WorldWideScience

Sample records for adriatic seafood contamination

  1. Organic and inorganic micropollutants in Adriatic seafood: contamination levels and evaluation of human potential intake; Microinquinanti organici ed inorganici in specie marine eduli del mare Adriatico: livelli di presenza e stima dell`assunzione potenziale da parte dell`uomo

    Energy Technology Data Exchange (ETDEWEB)

    Cubadda, F.; Stacchini, P.; Baldini, M. [Istituto Superiore di Sanita`, Rome (Italy). Lab. Alimenti

    1998-06-01

    Review the state of the art on the chemical contamination of seafood and on the human intake of contaminants through these commodities in the Adriatic area. Scientific literature on the levels of inorganic (i.e. cadmium, chromium, mercury, lead) and organic (i.e. pesticides, polychlorinated biphenyls, dioxins, polycyclic aromatic hydrocarbons) contaminants as well as studies on potential health hazard related to Adriatic seafood consumption were examined. Where sufficient data were available, an evaluation of the average potential intake was carried out through the correlation between contamination levels in marine organisms and seafood consumption. The results of this study did not show any risk for the average consumer related to the consumption of Adriatic seafood. Nevertheless it is essential to carefully evaluate the potential risk to which some population groups, especially high consumers of local seafood, are exposed. For this purpose, it is necessary to obtain additional data on the content of contaminants in the main seafood products and on the levels of consumption by the Adriatic coastal populations. [Italiano] Si propone di fare il punto sullo stato dell`arte in materia di contaminazione chimica delle specie marine eduli e di assunzione di contaminanti da parte dell`uomo mediante tali alimenti nell`are adriatica. A tal fine e` stata presa in esame la letteratura scientifica concernente i livelli di presenza di contaminanti inorganici (cadmio, cromo, mercurio, piombo) e organici (pesticidi, policlorobifenili, diossine, idrocarburi policiclici aromatici), nonche` gli studi relativi al problema del rischio sanitario associato al consumo di prodotti della pesca nel Mare Adriatico. Nel caso dei contaminanti per i quali esiste una sufficiente base di dati si e` proceduto ad una stima dell`assunzione media potenziale calcolata mediante la correlazione dei livelli di presenza negli organismi marini con dati di consumo alimentare. In base ai risultati ottenuti

  2. Assuring Seafood Safety: Contaminants and Residues in Irish Seafood 2004-2008

    OpenAIRE

    McGovern, Evin; McHugh, Brendan; O’Hea, Linda; Joyce, Eileen; Tlustos, Christina; Glynn, Denise

    2011-01-01

    This report provides an overview on the occurrence of environmental contaminants, such as metals and persistent organic pollutants (POPs), and veterinary residues in Irish seafood. Compliance of seafood (shellfish, crustaceans, wild and farmed finfish) with relevant EC Regulatory Limits for contaminants is examined and an overview of conformance of the aquaculture sector with the requirements of the EC Residues Directive (Dir 96/23/EC) is presented for 2004 - 2008. The contribution of seafood...

  3. State of the art of seafood chemical contamination in the Adriatic sea and risk assessment for the population living along the Italian coast; Stato dell'arte sulla contaminazione chimica dei prodotti ittici nel mare Adriatico e valutazione del rischio per la popolazione residente lungo la costa italiana

    Energy Technology Data Exchange (ETDEWEB)

    Ferrara, F.; Funari, E. [Istituto Superiore di Sanita' , Rome (Italy). Lab. di Igiene Ambientale

    1999-07-01

    Data on seafood chemical contamination in the Adriatic sea (Italy) from open and grey literature referring to the period 1985-1997 are gathered. In spite of the high number of available data, the risk assessment was possible only few contaminants. Through the comparison of the estimated intakes with the safety doses defined by international organizations, according to a conservative approach, the latter were never exceeded for the general population in the case of aluminium, chromium, copper, mercury, zinc, DDTs, HCBs and HCHs. In the case of strong consumer categories, these doses were sometimes exceeded for arsenic, cadmium, lead and nickel only when the conservative approach was applied but not with the some realistic one. [Italian] Sono presentati i dati della letteratura scientifica aperta e grigia, relativi al periodo 1985-1997, sulla contaminazione chimica dei prodotti ittici del mare Adriatico. Nonostante la notevole mole di dati, la valutazione del rischio e' possibile soltanto per alcuni contaminanti. Confrontando le assunzioni stimate con le dosi ritenute tollerabili da organismi internazionali, applicando un approccio cautelativo, queste ultime non vengono mai superate per la popolazione generale nei casi di alluminio, cromo, mercurio, rame e zinco, DDT, HCB e HCH. Per le categorie dei forti consumatori, applicando l'approccio cautelativo, ma non quello piu' realistico, le dosi di sicurezza vengono talvolta superate nei casi di arsenico, cadmio, nichel e piombo.

  4. Prevalence and growth of Listeria monocytogenes in naturally contaminated seafood

    DEFF Research Database (Denmark)

    Jørgensen, Lasse Vigel; Huss, Hans Henrik

    1998-01-01

    Listeria monocytogenes contamination of seafood varies with product category. The highest prevalence was found in cold- smoked fish (34-60%), while the lowest was found in heat- treated and cured seafood (4-12%). The prevalence of L. monocytogenes differed greatly in cold-smoked salmon between...... production sites, ranging from monocytogenes. The organism showed moderate growth...... in naturally contaminated cold-smoked, and 'gravad', fish while the growth appeared faster in hot smoked fish. Thus L. monocytogenes is not under control in these products. Finally, the prevalence and growth of L. monocytogenes in naturally contaminated cold-smoked salmon are discussed in relation...

  5. Environmental contaminants of emerging concern in seafood--European database on contaminant levels.

    Science.gov (United States)

    Vandermeersch, Griet; Lourenço, Helena Maria; Alvarez-Muñoz, Diana; Cunha, Sara; Diogène, Jorge; Cano-Sancho, German; Sloth, Jens J; Kwadijk, Christiaan; Barcelo, Damia; Allegaert, Wim; Bekaert, Karen; Fernandes, José Oliveira; Marques, Antonio; Robbens, Johan

    2015-11-01

    Marine pollution gives rise to concern not only about the environment itself but also about the impact on food safety and consequently on public health. European authorities and consumers have therefore become increasingly worried about the transfer of contaminants from the marine environment to seafood. So-called "contaminants of emerging concern" are chemical substances for which no maximum levels have been laid down in EU legislation, or substances for which maximum levels have been provided but which require revision. Adequate information on their presence in seafood is often lacking and thus potential risks cannot be excluded. Assessment of food safety issues related to these contaminants has thus become urgent and imperative. A database (www.ecsafeseafooddbase.eu), containing available information on the levels of contaminants of emerging concern in seafood and providing the most recent data to scientists and regulatory authorities, was developed. The present paper reviews a selection of contaminants of emerging concern in seafood including toxic elements, endocrine disruptors, brominated flame retardants, pharmaceuticals and personal care products, polycyclic aromatic hydrocarbons and derivatives, microplastics and marine toxins. Current status on the knowledge of human exposure, toxicity and legislation are briefly presented and the outcome from scientific publications reporting on the levels of these compounds in seafood is presented and discussed.

  6. Distribution and fate of legacy and emerging contaminants along the Adriatic Sea: A comparative study.

    Science.gov (United States)

    Combi, Tatiane; Pintado-Herrera, Marina G; Lara-Martin, Pablo A; Miserocchi, Stefano; Langone, Leonardo; Guerra, Roberta

    2016-11-01

    The spatial distributions and fates of selected legacy and emerging compounds were investigated and compared in surface sediments sampled along the Adriatic mud-wedge and in deep-sea regions from the southern Adriatic basin. Results indicated that the concentrations of legacy contaminants (PAHs, PCBs and DDTs) and emerging contaminants (tonalide, galaxolide, EHMC, octocrylene, BP3 and NP) ranged from 0.1 to 572 ng g(-1) and from emerging contaminants to sediments in the Adriatic Sea. Nevertheless, the prevalence of some UV filters and fragrances in the central and southern Adriatic indicates that the proximity to tourist areas and WWTPs discharges seems to affect the distribution of those compounds. The accumulation of contaminants in the deep-sea areas supports the inference that this region may act as an important repository for contaminants within the Adriatic Sea. Estimated annual contaminant accumulation reveals that both, legacy and emerging contaminants accumulate preferentially in the northern Adriatic (40-60% of the total annual contaminant accumulation), where the presence of legacy, and to a lesser extent emerging contaminants, are likely to pose an immediate or long-term hazard to resident biota.

  7. Microcystin Contamination in Sea Mussel Farms from the Italian Southern Adriatic Coast following Cyanobacterial Blooms in an Artificial Reservoir

    Directory of Open Access Journals (Sweden)

    De Pace Rita

    2014-01-01

    Full Text Available An experimental study was performed in 2009-2010 to investigate the polluting effect of eutrophic inland waters communicating with the sea coast. The study was planned after a heavy and long-lasting Planktothrix rubescens bloom occurred in the Lake Occhito, an artificial reservoir. The waters of the reservoir flow into the southern Adriatic Sea, near several marine breeding of Mytilus galloprovincialis mussels, a typical seafood from the Apulia region (Southern Italy. A monitoring study of water and mussels from the sea coast of northern Apulia region and on the Occhito reservoir was carried out over twelve months, to get more information regarding the contamination by cyanobacteria and related cyanotoxins. Elisa immunoassay analyses estimated total microcystin amounts from 1.73 to 256 ng/g in mussels, up to 0.61 μg/L in sea water and up to 298.7 μg/L in lake water. Analyses of some samples of free-living marine clams as well as of marine and freshwater fish proved microcystin contamination. Selective confirmatory analyses by LC/ESI-Q-ToF-MS/MS on some mussel samples identified the microcystin desMe-MC-RR as the major toxin; this compound has been reported in the literature as a specific marker toxin of Planktothrix rubescens blooms. Our study describes for the first time the direct relationship between environmental pollution and food safety, caused by seafood contamination from freshwater toxic blooms.

  8. Environmental contaminants of emerging concern in seafood - European database on contaminant levels

    OpenAIRE

    Vandermeersch, Griet; Lourenço, Helena Maria; Álvarez-Muñoz, Diana; Cunha, Sara; Diogène, Jorge; Cano-Sancho, German; Sloth, Jens J.; Kwadijk, Christiaan; Barceló i Cullerés, Damià; Allegaert, Wim; Bekaert, Karen; Fernandes, José Oliveira; Marques, Antonio; Robbens, Johan

    2015-01-01

    Marine pollution gives rise to concern not only about the environment itself but also about the impact on food safety and consequently on public health. European authorities and consumers have therefore become increasingly worried about the transfer of contaminants from the marine environment to seafood. So-called "contaminants of emerging concern" are chemical substances for which no maximum levels have been laid down in EU legislation, or substances for which maximum levels have been provid...

  9. Environmental contaminants of emerging concern in seafood - European database on contaminant levels

    DEFF Research Database (Denmark)

    Vandermeersch, Griet; Lourenço, Helena Maria; Alvarez-Muñoz, Diana

    2015-01-01

    Marine pollution gives rise to concern not only about the environment itself but also about the impact on food safety and consequently on public health. European authorities and consumers have therefore become increasingly worried about the transfer of contaminants from the marine environment to ......, microplastics and marine toxins. Current status on the knowledge of human exposure, toxicity and legislation are briefly presented and the outcome from scientific publications reporting on the levels of these compounds in seafood is presented and discussed....

  10. Prevalence of microbial contamination of fresh seafood product sold in Constantine, Algeria

    Directory of Open Access Journals (Sweden)

    Amira Leila Dib

    2014-12-01

    Full Text Available The seafood products are considered as an important element in the Mediterranean diet and play a significant role in the appearance of diseases and food poisoning. Forty samples of seafood products from various provenances of eastern coast of Algeria were randomly collected from several retail markets at the Constantine region. Total bacterial counts of Aerobic Mesophilic bacteria, Salmonella spp., total and fecal coliforms, Staphylococcus aureus, sulphite reducing anaerobes bacteria, Vibrio spp., were measured. 39 samples (97.5% of the seafood product analysed, were inappropriate for human consumption, solely one sample 2.5% of sardines were suitable for human consumption. Salmonella spp., was detected in one sample (3% of Sardines, Total and fecal coliforms were detected in 39 samples, Clostridium spp. were detected in 5 samples. No strain of Staphylococcus aureus and vibrio were detected. The results of this study constitute an indicator of bacteriological contamination and showed that samples markets were contaminated with potential pathogenic microorganisms.

  11. Preliminary assessment on the bioaccessibility of contaminants of emerging concern in raw and cooked seafood.

    Science.gov (United States)

    Alves, Ricardo N; Maulvault, Ana L; Barbosa, Vera L; Cunha, Sara; Kwadijk, Christiaan J A F; Álvarez-Muñoz, Diana; Rodríguez-Mozaz, Sara; Aznar-Alemany, Òscar; Eljarrat, Ethel; Barceló, Damià; Fernandez-Tejedor, Margarita; Tediosi, Alice; Marques, António

    2017-02-13

    A preliminary assessment of the bioaccessibility of contaminants of emerging concern (CeCs), including perfluorinated compounds (PFCs; i.e. PFOS and PFUnA), brominated flame retardants (BFRs; i.e. BDE47, BDE100, α-HBCD) and pharmaceuticals and personal care products (PPCPs; i.e. venlafaxine, methylparaben and UV-filter OC) was performed in seafood species available in the European markets. Additionally, the effect of steaming on CeCs bioaccessibility was also investigated for the first time. Overall, steaming affected differentially contaminants' concentrations, for instance, decreasing PFOS levels in flounder, but increasing both BDE47 and BDE100. CeCs bioaccessibility varied according to seafood species and contaminant group, i.e. in general, lower bioaccessibility values were obtained for PBDEs (<70%, except for mackerel), while PFCs and PPCPs revealed higher bioaccessibility percentages (between 71 and 95%). The lowest bioaccessibility value was obtained for α-HBCD (mussel; 14%), whereas the highest percentage was observed in venlafaxine (mullet; 95%). Our preliminary study reports also, for the first time, the effects of steaming on CeCs bioaccessibility. In most cases, bioaccessibility was not affected by cooking, however, a decrease was observed in PBDEs and venlafaxine bioaccessibility in steamed mussels and mullet, respectively, thus lowering the potential health risks associated with seafood consumption.

  12. Toxic elements and speciation in seafood samples from different contaminated sites in Europe

    DEFF Research Database (Denmark)

    Maulvault, Ana Luísa; Anacleto, Patrícia; Barbosa, Vera

    2015-01-01

    farm area (Solund, Norway), between September and December 2013, were selected to assess metal contamination and potential risks to seafood consumers, as well as to determine the suitability of ecologically distinct organisms as bioindicators in environmental monitoring studies. Species exhibited....... This work highlights that the selection of the most appropriate bioindicator species is a fundamental step in environmental monitoring of each contaminant, especially in coastal areas. Furthermore, data clearly shows that the current risk assessment and legislation solely based on total As or Hg data...

  13. Intake of chemical contaminants through fish and seafood consumption by children of Catalonia, Spain: health risks.

    Science.gov (United States)

    Martí-Cid, Roser; Bocio, Ana; Llobet, Juan M; Domingo, José L

    2007-10-01

    The intake of arsenic (As), cadmium (Cd), mercury (Hg), lead (Pb), polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs), polychlorinated biphenyls (PCBs), polychlorinated naphthalenes (PCNs), polybrominated diphenylethers (PBDEs), polychlorinated diphenylethers (PCDEs), hexachlorobenzene, and polycyclic aromatic hydrocarbons through fish and seafood consumption by children of Catalonia, Spain, was assessed. In 2005, samples of the 14 most consumed marine species in Catalonia were randomly acquired in various cities of the country. Analysis of the above chemical contaminants were determined according to the appropriate analytical techniques and the daily intakes were estimated. For most pollutants, intake was higher in boys than in girls. Average exposure of children to contaminants through fish and seafood consumption did not exceed the respective tolerable daily intake of those pollutants for which it has been already established (metals, PCDD/Fs plus dioxin-like PCBs, HCB, and PAHs). In relation to body weight, intake by children of most contaminants was higher than that found for other age groups of the general population of Catalonia.

  14. Predicted and observed growth of Listeria monocytogenes in seafood challenge tests and in naturally contaminated cold smoked salmon

    DEFF Research Database (Denmark)

    Dalgaard, Paw; Jørgensen, Lasse Vigel

    1998-01-01

    with various types of seafoods. Storage trials clearly showed the growth of L. monocytogenes in naturally contaminated cold-smoked salmon to be markedly slower than growth in inoculated challenge tests. Consequently, all four models substantially overestimated growth in the naturally contaminated products......The performance of the Pathogen Modelling Program, the Food MicroModel, the Murphy-model and the Ross-model for growth of L. monocytogenes was evaluated by comparison with data from 100 seafood challenge tests and data from 13 storage trials with naturally contaminated sliced vacuum-packed cold-smoked....... Temperature, pH, NaCl/a(w) and lactate were measured in the storage trials and on the basis of these parameters, the Food MicroModel mu(max)-bias factor was 5.2. Clearly, the model could not be successfully validated with naturally contaminated cold-smoked salmon. To improve the applicability of predictive...

  15. Emerging Seafood Preservation Techniques to Extend Freshness and Minimize Vibrio Contamination

    Directory of Open Access Journals (Sweden)

    Jennifer eRonholm

    2016-03-01

    Full Text Available Globally, the popularity of seafood consumption is increasing exponentially. To meet the demands of a growing market, the seafood industry has increasingly been innovating ways keep their products fresh and safe while increasing production. Marine environments harbour several species of indigenous microorganisms, some of which, including Vibrio spp., may be harmful to humans, and all of which are part of the natural microbiota of the seafood. After harvest, seafood products are then often shipped over large geographic distances, sometimes for prolonged periods, during which the food must stay fresh and pathogen proliferation must be minimized. Upon arrival there is often a strong desire, arising from both culinary and nutritional considerations, to consume seafood products raw, or minimally cooked. This supply chain and the popular preferences have increased challenges for the seafood industry. This has resulted in a desire to develop methodologies that reduce pathogenic and spoilage organisms in seafood items to comply with regulations and result in minimal changes to the taste, texture, and nutritional content of the final product. This mini-review discusses and compares several emerging technologies, such as treatment with plant derived natural compounds, phage lysis, high-pressure processing, and irradiation for their ability to control pathogenic vibrios, limit the growth of spoilage organisms, and keep the desired organoleptic properties of the seafood product intact.

  16. Environmental contaminants of emerging concern in seafood - European database on contaminant levels

    NARCIS (Netherlands)

    Vandermeersch, Griet; Lourenço, Helena Maria; Alvarez-Muñoz, Diana; Cunha, Sara; Diogène, Jorge; Cano-Sancho, German; Sloth, Jens J.; Kwadijk, Christiaan; Barcelo, Damia; Allegaert, Wim; Bekaert, Karen; Fernandes, José Oliveira; Marques, Antonio; Robbens, Johan

    2015-01-01

    Marine pollution gives rise to concern not only about the environment itself but also about the impact on food safety and consequently on public health. European authorities and consumers have therefore become increasingly worried about the transfer of contaminants from the marine environment to

  17. Benthic biogeochemical cycling of mercury in two contaminated northern Adriatic coastal lagoons

    Science.gov (United States)

    Covelli, Stefano; Emili, Andrea; Acquavita, Alessandro; Koron, Neža; Faganeli, Jadran

    2011-10-01

    Previous research recognized most of the Northern Adriatic coastal lagoon environments as contaminated by mercury (Hg) from multiple anthropogenic sources. Among them, the Pialassa Baiona (P.B.) Lagoon, located near the city of Ravenna (Italy), received between 100 and 200 tons of Hg, generated by an acetaldehyde factory in the period 1957-1977. Further east, the Grado Lagoon has been mainly affected by a long-term Hg input from the Idrija mine (western Slovenia) through the Isonzo River since the 16th century. Hg cycling at the sediment-water interface (SWI) of the two lagoons was investigated and compared by means of an in situ benthic chamber, estimating diffusive Hg and Methyl-Hg fluxes in the summer season. Major chemical features in porewaters (Fe, Mn, H 2S, dissolved inorganic (DIC) and organic carbon (DOC), nutrients) and in the solid phase (C org, N and S) were also explored to understand the general biogeochemical conditions of the system in response to benthic respiration. The daily integrated flux for the methylated Hg form was extremely low in P.B. Lagoon, accounting for only 7% of the corresponding flux calculated for the Grado Lagoon. Despite a higher sedimentary Hg content in the P.B. Lagoon (14.4-79.0 μg g -1) compared to the Grado Lagoon (10.7-12.5 μg g -1), the in situ fluxes of Hg in the two experimental sites appeared similar. A selective sequential extraction procedure was applied to the solid phase, showing that the stable crystalline mineral phase cinnabar (HgS) is the predominant Hg fraction (about 50%) in the Grado Lagoon surface sediments. Conversely, Hg mobilization and sequestration in the P.B. Lagoon is related to the extremely anoxic redox conditions of the system where the intense sulfate reduction, by the release of sulfur and the formation of sulfides, limits the metal recycling at the SWI and its availability for methylation processes. Thus, the environmental conditions at the SWI in the P.B. Lagoon seem to represent a natural

  18. Toxic elements and speciation in seafood samples from different contaminated sites in Europe

    NARCIS (Netherlands)

    Maulvault, A.L.; Anacleto, P.; Barbosa, V.; Sloth, J.J.; Rasmussen, R.; Tediosi, A.; Fernandez-Tejedor, M.; Heuvel, F.H.M.; Kotterman, M.J.J.; Marques, A.

    2015-01-01

    The presence of cadmium (Cd), lead (Pb), mercury (THg), methylmercury (MeHg), arsenic (TAs), inorganic arsenic (iAs), cobalt (Co), copper (Cu), zinc (Zn), nickel (Ni), chromium (Cr) and iron (Fe) was investigated in seafood collected from European marine ecosystems subjected to strong anthropogenic

  19. Human health implications associated with mucilage in the northern Adriatic Sea.

    Science.gov (United States)

    Funari, E; Ade, P

    1999-01-01

    Mucilage in the northern Adriatic Sea is well known for its negative impact not only on the ecology of the affected area and on fishing activities but on tourism as well. The microhabitat mucilage creates in the sea can provide favourable conditions for the growth and/or survival of some environmental microorganisms that include human opportunistic pathogens. It also seems to favour the selective development of some marine toxic algae. Finally, mucilage can concentrate chemical contaminants from surrounding waters, hence increasing their bioaccumulation in seafoods. This paper examines the possible direct and indirect effects on human health of mucilage and other forms of marine aggregates.

  20. Effects of industrial processing on essential elements and regulated and emerging contaminant levels in seafood

    DEFF Research Database (Denmark)

    Rasmussen, Rie Romme; Bøge Søndergaard, Annette; Bøknæs, Niels

    2017-01-01

    Mitigation of contaminants in industrial processing was studied for prawns (cooked and peeled), Greenland halibut (cold smoked) and Atlantic salmon (cold smoked and trimmed). Raw prawns had significantly higher cadmium, chromium, iron, selenium and zinc content in autumn than in spring, while sum...

  1. Seafood Technology

    DEFF Research Database (Denmark)

    Børresen, Torger

    This presentation will fill the total picture of this conference between fisheries and aquaculture, blue biotech and bioconservation, by considering the optimal processing technology of marine resources from the raw material until the seafood reaches the plate of the consumer. The situation today...... must be performed such that total traceability and authenticity of the final products can be presented on demand. The most important aspects to be considered within seafood technology today are safety, healthy products and high eating quality. Safety can be divided into microbiological safety...... and not presenting any safety risk per se. Seafood is healthy due to the omega-3 fatty acids and the nutritional value of vitamins, peptides and proteins. The processing technology must however be performed such that these valuable features are not lost during production. The same applies to the eating quality. Any...

  2. Control options for Listeria monocytogenes in seafoods

    DEFF Research Database (Denmark)

    Huss, Hans Henrik; Jørgensen, Lasse Vigel; Vogel, Birte Fonnesbech

    2000-01-01

    At least three outbreaks of listeriosis associated with seafood have been reported. Listeria monocytogenes is widely distributed in the general environment including fresh water, coastal water and live fish from these areas. Contamination or recontamination of seafood may also take place during...

  3. SWASV speciation of Cd, Pb and Cu for the determination of seawater contamination in the area of the Nicole shipwreck (Ancona coast, Central Adriatic Sea).

    Science.gov (United States)

    Annibaldi, Anna; Illuminati, Silvia; Truzzi, Cristina; Scarponi, Giuseppe

    2011-12-01

    The study reports for the first time on the heavy metal contamination of the waters surrounding a shipwreck lying on the sea floor. Square wave anodic stripping voltammetry has been used for a survey of the total and dissolved Cd, Pb and Cu contents of the seawater at the site of the sinking of the Nicole M/V (Coastal Adriatic Sea, Italy). Results show that the hulk has a considerable impact as regards all three metals in the bottom water, especially for the particulate fraction concentrations, which increased by factors of ≈ 9 (Cd), ≈ 3 (Pb) and ≈ 5 (Cu). The contaminated plume extended downstream for about 2 miles. Much lower contamination was observed for dissolved bottom concentrations; nevertheless Pb (0.56 ± 0.03 nmol/L) is higher than the Italian legal limits established for 2015 and Cd (0.23 ± 0.03 nmol/L) is very close the limit of Cd will be exceeded if the hulk is not removed.

  4. [Monitoring of contamination of foodstuffs with elements noxious to human health. Part II. Mineral waters, soft drinks, fruits, nuts, rice, soybeans, fish and seafood].

    Science.gov (United States)

    Wojciechowska-Mazurek, Maria; Starska, Krystyna; Mania, Monika; Brulińska-Ostrowska, Elzbieta; Biernat, Urszula; Karłowski, Kazimierz

    2010-01-01

    Results of the 5-years cycle (2004-2008) monitoring investigations on food contamination with elements noxious to human health, involving testing of mineral waters and soft drinks (226 samples), fruits (467 samples), rice (234 samples), soybeans (236 samples), nuts and peanuts (237 samples), fish and seafood (237 samples) are discussed. The parties involved in testing were: laboratories of State Sanitary Inspection and the national reference laboratory of the Department of Food and Consumer Articles Research of National Institute of Public Health - National Institute of Hygiene. The reported metals contents did not give rise to health concerns, remaining generally below the levels set forth in food legislation and being comparable with contamination levels reported in other European countries; and for cadmium--often lower. Health hazard assessment was performed taking into account the mean contamination levels obtained and average domestic consumption of these food products groups in Poland. The highest intake expressed as the percentage of provisional tolerable weekly intake (PTWI) was obtained for mercury in fish, which has reached mean 3.2% PTWI. Controlled fish consumption recommendations should be adhered to by prospective mothers, pregnant women, breast-feeding women and young children. Lead and arsenic intake with mineral waters and soft drinks comprises approx. 15% of total intake of these elements with food.

  5. Seasonal Variations of Escherichia Coli Contamination in Clams (Chamelea Gallina) Harvested in the Adriatic Sea (San Benedetto del Tronto district, Italy)

    Science.gov (United States)

    Semeraro, Angela Marisa; Aliventi, Alessandra; Di Trani, Vittoria; Capocasa, Piero

    2014-01-01

    In the European Union, the classification of shellfish harvesting areas depends on levels of Escherichia coli checked in shellfish flesh and determines whether post-harvest treatment required before shellfish can be sold for human consumption. Nevertheless, intermittent sources of contamination, such as rainfall and runoff from agricultural and urban lands, may give rise to seasonal variations of E. coli concentration, hence an annual classification could not be correct. In this study, we investigated the microbial trend in clams (Chamelea gallina) harvested from the district of San Benedetto del Tronto, Italy. The Algaeadria database, a monitoring network for the whole Adriatic area, provided results from 2005 to 2012. E. coli values compliant and non-compliant with food safety criteria were evaluated by graphical data analysis tools and one-tailed Fisher’s exact test. The results showed a clear general seasonal trend and, in one of the considered areas, the non-compliant values from July to February were significantly lower than those from March to June (P<0.05). These findings may scientifically support a seasonal classification.

  6. Occurrence of organochlorine contaminants (PCBs, PCDDs and PCDFs) and pathologic findings in loggerhead sea turtles, Caretta caretta, from the Adriatic Sea (Mediterranean Sea).

    Science.gov (United States)

    Storelli, Maria M; Zizzo, Nicola

    2014-02-15

    Livers of 12 loggerhead sea turtles, Caretta caretta from the Eastern Mediterranean Sea (Adriatic Sea) were analyzed for the presence of polychlorinated biphenyls (PCBs), polychlorinated dibenzo-p-dioxins (PCDDs) and dibenzofurans (PCDFs). Pathological and microbiological studies were also carried out in order to provide a contribution to the knowledge of causes of Mediterranean turtle death. Boat-strike injuries, entanglement in derelict fishing nets and ingestion of hooks and monofilament lines are the causes of death most frequently observed. PCBs (average: 1,399 ng g(-1) fat basis) were the dominant chemicals, followed by PCDFs (average: 61 pg g(-1) fat basic) and PCDDs (average: 16 pg g(-1) fat basis). Hexachlorobiphenyl 153 accounted for the greatest proportion of the total PCBs, followed in order by PCB 138 and PCB 180 (14.1%). Mid-chlorinated, penta-through hepta-PCBs were among the top contributors to the sum of total PCBs, while the homolog pattern of PCCD/Fs was dominated by the tetra- to hexa-substituted congeners. In general the contamination level observed here was comparable with that reported in literature for specimens from different marine areas. Average TEQPCDD/Fs+Dl-PCBs concentration was 27.02 pg g(-1) wet weight (305.1 pg g(-1) lipid weight), with dioxin like-PCBs (93.4%) contributing much more to the total than PCDFs (3.9%) and PCDDs (2.7%). The appreciable concentration of TEQ would at first suggest that there are signs of potential threats to the health of these marine reptiles. Apart from PCBs, this is the first study documenting concentrations of PCDD/Fs in marine turtles from the Mediterranean Sea. Further investigations are urgently needed to characterize their contamination level for a better future protection and conservation of this endangered animal.

  7. Deepwater Horizon Seafood Safety Response - Deepwater Horizon Oil Spill Seafood Safety Response

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — In the aftermath of the Deepwater Horizon oil spill in 2010, there was concern about the risk to human health through consumption of contaminated seafood from the...

  8. Surrogate parameters for rapid monitoring of contaminant removal for activated sludge treatment plants for para rubber and seafood industries in Southern Thailand

    Directory of Open Access Journals (Sweden)

    Panalee Chevakidagarn

    2005-03-01

    Full Text Available This study aimed at using surrogate parameters for rapid monitoring of contaminant removed of activated sludge treatment plant for para rubber and seafood industries in Southern Thailand. Wastewaters from these industries contain high organic concentrations and chemicals. The activated sludge process (AS is usually applied as a treatment process. However, plant operators generally lack the understanding and means to control the treatment plants because of a continuous monitoring system is not employed and the monitoring parameters are time consuming. UV absorbency at various wavelengths was used in this study as a surrogate parameters, for predicting the removal capacity of each plant. COD, BOD, suspended solids and nitrate-nitrogen concentrations could be estimated reliably without being time consuming. The results showed that UV absorbency at 220 nm can be used as a parameter to predict nitrate-nitrogen concentrations which less than 15 mg/L. That at 550 nm is for predicting suspended solids concentration and that at 260 nm is for COD predict.

  9. Risk assessment of methylmercury in five European countries considering the national seafood consumption patterns

    DEFF Research Database (Denmark)

    Jacobs, Silke; Sioen, Isabelle; Jacxsens, Liesbeth

    2017-01-01

    Although seafood is a nutritious protein source, due to marine environmental pollution, seafood may also be a source of contaminants. The results obtained within the FP7-ECsafeSEAFOOD-project show that among the range of studied environmental contaminants certainly methylmercury (MeHg) requires d...

  10. Development and validation of a stochastic model for potential growth of Listeria monocytogenes in naturally contaminated lightly preserved seafood

    DEFF Research Database (Denmark)

    Mejlholm, Ole; Bøknæs, Niels; Dalgaard, Paw

    2015-01-01

    added acetic and/or lactic acids. The stochastic model was developed from an existing deterministic model including the effect of 12 environmental parameters and microbial interaction (O. Mejlholm and P. Dalgaard, Food Microbiology, submitted for publication). Observed maximum population density (MPD......A new stochastic model for the simultaneous growth of Listeria monocytogenes and lactic acid bacteria (LAB) was developed and validated on data from naturally contaminated samples of cold-smoked Greenland halibut (CSGH) and cold-smoked salmon (CSS). During industrial processing these samples were......) values of L. monocytogenes in naturally contaminated samples of CSGH and CSS were accurately predicted by the stochastic model based on measured variability in product characteristics and storage conditions. Results comparable to those from the stochastic model were obtained, when product characteristics...

  11. Health Risk Assessment for Cyanobacterial Toxins in Seafood

    Directory of Open Access Journals (Sweden)

    Andrew Humpage

    2012-03-01

    Full Text Available Cyanobacteria (blue-green algae are abundant in fresh, brackish and marine waters worldwide. When toxins produced by cyanobacteria are present in the aquatic environment, seafood harvested from these waters may present a health hazard to consumers. Toxicity hazards from seafood have been internationally recognised when the source is from marine algae (dinoflagellates and diatoms, but to date few risk assessments for cyanobacterial toxins in seafood have been presented. This paper estimates risk from seafood contaminated by cyanobacterial toxins, and provides guidelines for safe human consumption.

  12. Microbial biofilms in seafood: a food-hygiene challenge.

    Science.gov (United States)

    Mizan, Md Furkanur Rahaman; Jahid, Iqbal Kabir; Ha, Sang-Do

    2015-08-01

    Seafood forms a part of a healthy diet. However, seafood can be contaminated with foodborne pathogens, resulting in disease outbreaks. Because people consume large amounts of seafood, such disease outbreaks are increasing worldwide. Seafood contamination is largely due to the naturally occurring phenomenon of biofilm formation. The common seafood bacterial pathogens that form biofilms are Vibrio spp., Aeromonas hydrophila, Salmonella spp., and Listeria monocytogenes. As these organisms pose a global health threat, recent research has focused on elucidating methods to eliminate these biofilm-forming bacteria from seafood, thereby improving food hygiene. Therefore, we highlight recent advances in our understanding of the underlying molecular mechanisms of biofilm formation, the factors that regulate biofilm development and the role of quorum sensing and biofilm formation in the virulence of foodborne pathogens. Currently, several novel methods have been successfully developed for controlling biofilms present in seafood. In this review, we also discuss the epidemiology of seafood-related diseases and the novel methods that could be used for future control of biofilm formation in seafood.

  13. 北海市海产品微生物污染及其影响因素调查%Investigation on microbial contamination of seafood and its influencing factors in Beihai City

    Institute of Scientific and Technical Information of China (English)

    曾小峰; 吴德仁; 陈坚磊; 刘斌

    2012-01-01

    目的 了解北海市海产品微生物污染状况,探讨影响不同类型海产品、不同食用人群的环节和主要影响因素.方法 对该市销售量较大的海产鱼类、软体类和甲壳类共3类18种海产品,计120份样品进行采样和微生物检测;收集、核实近5年以来本市辖区内食源性疾病次数进行比对分析.结果 调查120份海产品,在检测6种相关微生物中仅检出副溶血性弧菌19份,检出率为15.8%.其中软体类、甲壳类和海水鱼类中的检出率分别为16.7%、16.2%和14.6%.不同处理方式的海产品中新鲜的检出率最高(21.5%),其次为冰冻的(18.5%),干货则未检出,差异有统计学意义(X2=6.99,P<0.05).该市近5年食物中毒69起,以细菌性为主(43起),而其中因副溶血性弧菌引起的有26起(60.5%).结论 该市的海产品一定程度上受到副溶血性弧菌污染,新鲜的软体类海产品属于微生物污染高危海产品种类,应开展深入的污染控制研究和加强必要的监管.%[Objective] To understand the status of microbial contamination in seafood in Beihai City, explore the main influencing factors of different types of seafood and populations. [Methods] 120 samples were collected from 3 types of 18 kinds of seafood which included marine fishes, mollusks and crustaceans, and were detected for microbial contamination. The data of food-borne diseases in Beihai city in the last 5 years were collected and verified, and a comparative analysis were conducted. [ Results ] 120 seafood samples were detected for 6 kinds of related microorganisms, and vibrio parahaemolyticus was found in 19 samples with the detection rate of IS. 8%. The detection rate of mollusks, crustaceans and marine fishes was respectively 16. 7% , 16. 2% and 14.6%. Among different treatment methods, the detection rate of fresh samples was the highest (21.5% ), followed by the frozen samples (18.5% ) , vibrio parahaemolyticus was not detected in dry

  14. Bisphenol A in edible part of seafood

    Directory of Open Access Journals (Sweden)

    Adele Repossi

    2016-05-01

    Full Text Available Bisphenol A (BPA is a man-made compound, mainly used as a monomer to produce polycarbonate (PC, epoxy resins, non-polymer additives to other plastics, which have many food related applications, such as food storage containers, tableware and internal coating of cans, as well as non-food applications such as electronic equipment, construction materials and medical devices. BPA exposure can occur when the residual monomer migrates into packaged food and beverages. Moreover, due to the ubiquitous presence of this compound, the general population can be exposed to environmental sources such as water, air and soil. Many studies have investigated the potential health hazards associated with BPA, which can elicit toxic and cancerogenic effects on humans. According to the European Food Safety Authority opinion, diet is considered to be the main source of exposure, especially canned food; moreover, among non-canned food, meat and fish products have the highest levels of BPA contamination. This review focuses on BPA contamination in seafood, analysing worldwide literature (from January 2010 to October 2015 on BPA contamination of edible parts. The authors try to identify differences between canned and non-canned seafood in literature, and gaps in the state of art. The data evaluated underline that all concentrations for both canned and non-canned seafood were below the specific migration limit set by the European Community Directive for BPA in food. Moreover, the canned seafood is more contaminated than the non-canned one.

  15. Prevention and control of hazards in seafood

    DEFF Research Database (Denmark)

    Huss, Hans Henrik; Reilly, A.; Embarek, Peter Karim Ben

    2000-01-01

    are listed and discussed. It is pointed out that there are serious safety concerns related to the consumption of raw fish and shellfish due to the presence of biological (bacteria, virus, parasites) and chemical (biotoxins) hazards. These hazards are present in the fish and shellfish pre......Seafood is high on the list of foods transmitting disease. However, the food safety issues are highly focussed and more than 80% of all seafood-borne outbreaks are related to biotoxins (ciguatoxin), scombrotoxin or the consumption of raw molluscan shellfish. The safety hazards in seafood production......-harvest and are difficult or impossible to control by applying presently available preventive measures. In contrast, the hazards related to contamination, recontamination or survival of biological hazards during processing are well-defined and can be controlled by applying Good Manufacturing Practice (GMP), Good Hygiene...

  16. Evaluation of benefits and risks related to seafood consumption.

    Science.gov (United States)

    Sioen, I; De Henauw, S; Van Camp, J

    2007-01-01

    Dietary intake of long chain omega-3 poly-unsaturated fatty acids (LC n-3 PUFAs) in developed countries is low compared to recommendations. Seafood is naturally rich in LC n-3 PUFAs, vitamin D, and iodine, but is also a dietary source of heavy metals and organic pollutants. This study investigated the current intake of selected nutrients and contaminants via seafood and studied whether the recommendation for LC n-3 PUFAs could be reached through seafood consumption, without exceeding tolerable daily intakes (TDIs) of methyl mercury (MeHg) and dioxin-like compounds. Also the contribution of LC n-3 enriched margarines was assessed. On the basis of the current seafood consumption data, the simulation results predicted that the population currently does not reach an adequate intake for the three nutrients considered, at least when only seafood consumption is accounted for. This is mainly due to low frequency of seafood consumption. Regarding the contaminants, MeHg contamination in seafood assumed to be available on the Belgian market is not a major issue. In contrast, exceeding the TDI was noticed for the intake of dioxin-like compounds and this for heavy seafood consumers. Combination of regular seafood consumption (twice a week), with important contribution of fatty fish species (at least 50%), with regular consumption of EPA plus DHA enriched margarine can be advised to maximize LC n-3 PUFA intake without exceeding the TDI for dioxin-like compounds. It is important to add that no other dietary sources of dioxin-like compounds were taken into account in this assessment.

  17. Occupational seafood allergy: a review

    OpenAIRE

    Jeebhay, M; Robins, T; Lehrer, S; Lopata, A

    2001-01-01

    BACKGROUND—Recent years have seen increased levels of production and consumption of seafood, leading to more frequent reporting of allergic reactions in occupational and domestic settings. This review focuses on occupational allergy in the fishing and seafood processing industry.
REVIEW—Workers involved in either manual or automated processing of crabs, prawns, mussels, fish, and fishmeal production are commonly exposed to various constituents of seafood. Aerosolisation of seafood and cooking...

  18. Seafood and Water Management

    Directory of Open Access Journals (Sweden)

    Saskia M. van Ruth

    2014-12-01

    Full Text Available Seafood is an important food source for many. Consumers should be entitled to an informed choice, and there is growing concern about correct composition labeling of seafood. Due to its high price, it has been shown to be vulnerable to adulteration. In the present study, we focus on moisture levels in seafood. Moisture and crude protein contents of chilled and frozen cod, pangasius, salmon, shrimp and tilapia purchased from various retail outlets in the Netherlands were examined by reference methods and the values of which were compared with the reported data from other studies in literature. Significant differences in proximate composition were determined for different species and between chilled and frozen products of the same species. Pangasius products showed the highest moisture contents in general (86.3 g/100 g, and shrimp products revealed the largest differences between chilled and frozen products. Comparison with literature values and good manufacturing practice (GMP standards exposed that, generally, chilled pangasius, frozen pangasius and frozen shrimp products presented considerably higher moisture and lower crude protein/nitrogen contents than those found in other studies. From the GMP standards, extraneous water was estimated on average at 26 g/100 g chilled pangasius product, and 25 and 34 g/100 g product for frozen shrimp and pangasius products, respectively.

  19. 广州地区海产品和珠江水中致病性弧菌污染状况监测%Investigation of contamination status of Pathogenic Vibrio isolated from seafood and Pearl River water in Guangzhou

    Institute of Scientific and Technical Information of China (English)

    邓志爱; 陈佳旋; 李孝权; 何洁仪; 吴新伟; 陈守义; 杨智聪

    2011-01-01

    目的:了解广州地区海产品和珠江水中致病性弧菌的污染状况,为卫生行政部门制定相关控制措施提供科学依据.方法:霍乱弧菌按WS289-2008附录A和霍乱防治手册(第五版)进行检测,副溶血性弧菌按GB/T4789.7-2008操作,创伤弧菌的检验按国家食源性致病菌监测工作手册中创伤弧菌检验标准操作程序进行.结果:2009年-2010年二年共完成320份样品检测,共检出119株致病菌,检出率为37.19%.其中检出率最高的是副溶血性弧菌,检出率为26.56%,其次为创伤弧菌,检出率为9.06%,O1群霍乱弧菌检出率为1.56%.海产品和珠江水中致病性弧菌污染水平存在季度性差异(P<0.005).结论:应加强对海产品和珠江水中致病性弧菌的监测,尤其是在温暖季节.%Objective:To learn about the contamination status of pathogenic Vibrio isolated from seafood and Pearl River water in Guangzhou area and to provide scientific data for related health administration in making controlling measures. Methods: Vibrio cholerae were isolated and identified according to Diagnostic criteria for cholera WS 289 - 2008 ( Appendix A) and Mannual for cholera prevention and therapy. Vibrio parahaemolyticus were isolated and identified according to National Standards of Microbiological Examination for Vibrio parahaemolyticus ( GB/T4789.7 - 2008 ). The isolation and identification of Vibrio vulnificus were performed according to National Surveillance Mannual for food- borne pathogenic bacteria. Results: 119 strains of pathogenic Vibrio were isolated from all 320 samples, with the detection rate being 37.19%. Among them, Vibrio parahaemolyticus had the most highest detection rate ( 26.56% ), followed by Vibrio vulnificus ( 9.06% ) and Vibrio cholera serogroup O1 ( 1.56% ). Significant differences were observed in the contamination rate among pathogenic Vibrio in different quarter of the year ( P < 0. 005 ).Conclusion: There is high degree of contamination

  20. Separation of risks and benefits of seafood intake

    DEFF Research Database (Denmark)

    Budtz-Jørgensen, Esben; Grandjean, Philippe; Weihe, Pál

    2007-01-01

    a prospective study of developmental methylmercury neurotoxicity in the Faroe Islands. RESULTS: Adjustment for the benefits conferred by maternal fish intake during pregnancy resulted in an increased effect of the prenatal methylmercury exposure, as compared with the unadjusted results. The dietary......BACKGROUND: Fish and seafood provide important nutrients but may also contain toxic contaminants, such as methylmercury. Advisories against pollutants may therefore conflict with dietary recommendations. In resolving this conundrum, most epidemiologic studies provide little guidance because...... exposure. The adverse effects of methylmercury exposure from fish and seafood are therefore likely to be underestimated by unadjusted results from observational studies, and the extent of this bias will be study dependent....

  1. Seafood consumption among pregnant and non-pregnant women of childbearing age in the United States, NHANES 1999-2006

    OpenAIRE

    2014-01-01

    Objectives: Long-chain polyunsaturated fatty acids found in seafood are essential for optimal neurodevelopment of the fetus. However, concerns about mercury contamination of seafood and its potential harm to the developing fetus have created uncertainty about seafood consumption for pregnant women. We compared fish and shellfish consumption patterns, as well as their predictors, among pregnant and non-pregnant women of childbearing age in the US.Methods: Data from 1,260 pregnant and 5,848 non...

  2. A laboratory-incubated redox oscillation experiment to investigate Hg fluxes from highly contaminated coastal marine sediments (Gulf of Trieste, Northern Adriatic Sea).

    Science.gov (United States)

    Emili, A; Carrasco, L; Acquavita, A; Covelli, S

    2014-03-01

    Mercury (Hg) mobility at the sediment-water interface was investigated during a laboratory incubation experiment conducted with highly contaminated sediments (13 μg g(-1)) of the Gulf of Trieste. Undisturbed sediment was collected in front of the Isonzo River mouth, which inflows Hg-rich suspended material originating from the Idrija (NW Slovenia) mining district. Since hypoxic and anoxic conditions at the bottom are frequently observed and can influence the Hg biogeochemical behavior, a redox oscillation was simulated in the laboratory, at in situ temperature, using a dark flux chamber. Temporal variations of several parameters were monitored simultaneously: dissolved Hg (DHg) and methylmercury (MeHg), O2, NH4 (+), NO3 (-) + NO2 (-), PO4 (3-), H2S, dissolved Mn(2+), dissolved inorganic and organic carbon (DIC and DOC). Under anoxic conditions, both Hg (665 ng m(2) day(-1)) and MeHg (550 ng m(2) day(-1)) fluxed from sediments into the water column, whereas re-oxygenation caused concentrations of MeHg and Hg to rapidly drop, probably due to re-adsorption onto Fe/Mn-oxyhydroxides and enhanced demethylation processes. Hence, during anoxic events, sediments of the Gulf of Trieste may be considered as an important source of DHg species for the water column. On the contrary, re-oxygenation of the bottom compartment mitigates Hg and MeHg release from the sediment, thus acting as a natural "defence" from possible interaction between the metal and the aquatic organisms.

  3. Establishment of a seafood index to assess the seafood consumption in pregnant women

    Directory of Open Access Journals (Sweden)

    Ingvild E. Graff

    2013-02-01

    Full Text Available Background: Seafood (fish and shellfish is an excellent source of several essential nutrients for pregnant and lactating women. A short food frequency questionnaire (FFQ that can be used to quantitatively estimate seafood consumption would be a valuable tool to assess seafood consumption in this group. Currently there is no such validated FFQ in Norway. Objective: The objective of this study was to establish and validate a seafood index from a seafood FFQ against blood biomarkers (the omega-3 index, the omega-3 HUFA score, and serum 25OH vitamin D. Design: We assessed maternal seafood consumption during the 28th gestation week in healthy Norwegian women (n=54 with a seafood FFQ. A seafood index was developed to convert ordinal frequency data from the FFQ into numerical scale data. The following blood biomarkers were used as a validation method: omega-3 index, omega-3 HUFA score, and the serum 25OH vitamin D. Results: The reported frequency of seafood as dinner and as spread was strongly correlated with the estimated frequencies of seafood as dinner and as spread. This indicated that the seafood index is a valuable tool to aggregate reported frequencies from the seafood FFQ. The seafood index composed of the frequency of seafood consumption and intake of omega-3 supplements, termed the total seafood index, correlated positively with the omega-3 index, omega-3 HUFA score, and 25OH vitamin D. Conclusion: We established and validated a seafood index from a seafood FFQ. The developed seafood index can be used when studying health effects of seafood consumption in large populations. This seafood FFQ captures seafood consumption and omega-3 supplement intake considerably well in a group of pregnant women.

  4. Seafood: Nutritional Gold for Seniors

    Directory of Open Access Journals (Sweden)

    Alexandra McManus

    2010-12-01

    Full Text Available ObjectivesTo conduct a systematic review of published evidence around seafood, health and seniors.MethodData sources reviewing included: Proquest; PubMed; Science Direct; Taylor and Francis; Cochran Collaboration; Web of Knowledge and Web of Science. Key search terms included seniors, ageing, fish, seafood, protein, health and various lifestyle conditions Results A diet high in marine source Omega-3 poly unsaturated fatty acids affords particular benefits for seniors in a reduced risk of all cause mortality, with the strongest evidence around coronary heart disease and ischemic stroke. Other benefits include reduced inflammation associated with arthritis and delay to onset and slowed progression of dementia and Alzheimer’s disease. Conclusion There is increasing evidence to support the regular seafood consumption (particularly oily fish as being protective against a number of aged-related health conditions. Seniors should be encouraged to consume 3500mg- 4000mg of marine source Omega-3 PUFAs each week.

  5. A community-based assessment of seafood consumption along the lower James River, Virginia, USA: potential sources of dietary mercury exposure.

    Science.gov (United States)

    Holloman, Erica L; Newman, Michael C

    2010-04-01

    The use of community-based participatory research (CBPR) methods to conduct environmental exposure assessments provides valuable insight about disparities in seafood consumption and contaminant exposure. Ninety-five community-specific seafood consumption surveys were administered to low-income African-American women (ages 16-49) residing in the Southeast community of Newport News, VA, USA, for the purpose of assessing potential dietary mercury exposure. Only the results of the seafood consumption surveys are presented in this manuscript. Approximately 65% of the women surveyed do not fish; however, 83% had consumed seafood within the last 7 days. Whiting, shrimp, and canned tuna were the three items most frequently consumed. Ninety-three percent of the women surveyed stated that grocery/seafood markets were the main sources of the seafood items generally consumed. The mean seafood consumption rate for the women surveyed was 147.8 g/day (95% CI: 117.6-185.8), a rate substantially higher than the mean seafood consumption rate reported for US women (1.8 g/day 95% CI: 1.51-2.04). Shrimp, croaker, and blue crab were the top three seafood items with the highest summed amount (g/day) consumed. There was no significant association between demographic variables (age, income, education, and weight) and total number of seafood items listed, ingestion rate (g/meal), exposure frequency (meals/year), and seafood consumption rate (g/day). By using CBPR to assess seafood consumption in this community, we learned that even though women in Southeast Newport News, Virginia are not subsistence fishers, they consume seafood at a subsistence fisher rate. Of the three seafood items most frequently consumed, canned tuna potentially plays a significant role in dietary mercury exposure for women in this community. Future work includes determining mercury concentrations in seafood items consumed and generating community-specific statements of dietary mercury risks.

  6. Determination of cadmium, chromium, lead and vanadium in six fish species from the Adriatic Sea.

    Science.gov (United States)

    Sepe, A; Ciaralli, L; Ciprotti, M; Giordano, R; Funari, E; Costantini, S

    2003-06-01

    Concentrations of cadmium, chromium, lead and vanadium were determined in samples of six fish species collected along the coast of the Adriatic Sea. The concentrations of the elements studied were generally low, often below the detection limits of the analytical methods. The highest values (microg x kg(-1) fresh weight) were observed, mainly in the central area of the Adriatic Sea, for anchovy (Cd 20.2, Cr 82.9, Pb 45.9, V 89.9), red mullet (Cd 3.1, Cr 31.0, Pb 36.0, V 79.1) and mackerel (Cd 7.7, Cr 28.0, Pb 11.4, V 43.5). The concentrations of cadmium and lead in all the species examined were below the maximum levels indicated by the European Community for these two elements in seafood, and also would lead to exposure levels lower than the provisional tolerable daily intakes suggested by the FAO/WHO for Cd (420 microg x week(-1) for a 60-kg person) and Pb (1500 microg x week(-1) for a 60-kg person). The concentration of chromium was lower than the recommended daily amount (50-200 microg x day(-1) for a 60-kg person) indicated by the US National Research Council. An 11-34% contribution to the daily vanadium ingestion with fish was calculated for the population of the Adriatic coast.

  7. Statement on the benefits of fish/seafood consumption compared to the risks of methylmercury in fish/seafood

    Directory of Open Access Journals (Sweden)

    EFSA Panel on Scientific Committee (SC

    2015-01-01

    Full Text Available Following a request from the European Commission to carry out a risk benefit analysis as regards the risks and benefits to human health of fish/seafood consumption related to methylmercury, the EFSA Scientific Committee used previous work performed by the EFSA Panel on Contaminants in the Food Chain and the EFSA Panel on Dietetic Products, Nutrition and Allergies to create scenarios based on typical fish consumption patterns of population groups at risk of exceeding the tolerable weekly intake (TWI for methylmercury. The Scientific Committee then estimated how many servings of fish/seafood per week these population groups would need to reach the TWI for methylmercury and the dietary reference value (DRV for n-3 (Long-Chain Polyunsaturated Fatty Acid (LCPUFA. When consuming species with a high methylmercury content, only a few numbers of servings (<1–2 can be eaten before reaching the TWI, which may be attained before the DRV. To protect against inter alia neurodevelopmental toxicity of methylmercury and achieve the benefits of fish consumption (effect of fish/seafood consumption during pregnancy on functional outcomes of children’s neurodevelopment and on cardiovascular diseases in adults, which are associated with 1–4 fish servings per week, fish/seafood species with a high content of mercury in the daily diet should be limited. Because a variety of fish species are consumed across Europe, it is not possible to make general recommendations on fish consumption. The Scientific Committee therefore recommends that each country needs to consider its own pattern of fish consumption, especially the species of fish consumed, and carefully assess the risk of exceeding the TWI of methylmercury while obtaining the health benefits from consumption of fish/seafood.

  8. Seafood wastewater treatment in constructed wetland: tropical case.

    Science.gov (United States)

    Sohsalam, Prapa; Englande, Andrew Joseph; Sirianuntapiboon, Suntud

    2008-03-01

    A series of investigations were conducted to evaluate the feasibility of using constructed wetlands to remove pollutants from seafood processing wastewater. Six emergent plant species; Cyperus involucratus, Canna siamensis, Heliconia spp., Hymenocallis littoralis, Typha augustifolia and Thalia deabata J. Fraser were planted in surface flow wetland. They were fed with seafood wastewater that was 50% diluted with treated seafood wastewater from an aerated lagoon. All macrophytes were found to meet satisfying treatment efficiency (standard criteria for discharged wastewater) at 5 days hydraulic retention time (HRT). While C. involucratus, T. deabata and T. augustifolia met acceptable treatment efficacy at 3 days HRT. Nutrient uptake rate of these species was observed in the range of 1.43-2.30 g Nitrogen/m(2)day and 0.17-0.29 g Phosphorus/m(2)day, respectively at 3 days HRT. The highest treatment performances were found at 5 days HRT. Average removal efficiencies were 91-99% for BOD(5), 52-90% for SS, 72-92% for TN and 72-77% for TP. Plant growth and nitrogen assimilation were experienced to be most satisfactory for C. involucratus, T. deabata and T. augustifolia. Lower HRTs affected contaminant removal efficiency for all species. C. involucratus, T. deabata and T. augustifolia can remove all contaminants efficiently even at the lowest hydraulic retention time (1 day).

  9. Irradiation preservation of seafood: Literature review

    Energy Technology Data Exchange (ETDEWEB)

    Molton, P.M.

    1987-10-01

    The application of gamma-irradiation for extending the shelf life of seafood has been of interest for many years. This report reviews a number of studies on seafood irradiation conducted over the past several years. Topics covered include seafood irradiation techniques and dosages, species applicability and differences, the effects of packaging on seafood preservation, and changes in organoleptic acceptability as a result of irradiation. Particular attention is given to radiation effects (likely and unlikely) of concern to the public. These include the potential for generation of toxic chemical products, botulinum toxin production, and other health concerns. No scientifically defensible evidence of any kind was found for any harmful effect of irradiation of seafoods at the doses being considered (less than 300 krad), and all indications are that irradiation is an acceptable and needed additional tool for seafood preservation. 49 refs., 14 figs., 14 tabs.

  10. Consumer's food motives and seafood consumption

    DEFF Research Database (Denmark)

    Nguyen, Thong Tien; Solgaard, Hans Stubbe

    2016-01-01

    consumption frequencies of three typical seafood products (i.e., fish, shrimp and mussels) by estimating ordered probit models. Convenience and weight control are the most important motives driving the seafood consumptions, suggesting that convenience oriented-people choose seafood as meals less regularly......, while weight control oriented-people eat seafood more regularly. People who live alone are less likely to eat any type of the seafood; elderly and high income people are more likely to eat fish. Large size families avoid buying fish and shrimp probably due to the economic reason. The implications......The role of personal factors in driving seafood choice behavior was investigated. The individual psychological factors (i.e., food motives) and socio-demographic variables were measured on a national representative sample (n=996) of French adults. The personal factors were used to predict...

  11. Interannual variability of the Adriatic Sea circulation

    Science.gov (United States)

    Beg Paklar, Gordana; Sepic, Jadranka; Grbec, Branka; Dzoic, Tomislav; Kovac, Zarko; Ivatek-Sahdan, Stjepan

    2016-04-01

    The Regional Ocean Modeling System (ROMS) was implemented in order to reproduce interannual variability of the Adriatic Sea circulation. Simulations and model result analysis were performed for a three-year period from 1st January 2011 to 31st December 2013. ROMS model run was forced with realistic atmospheric fields obtained from meteorological model Aladin, climatological river discharges, tides and Mediterranean circulation imposed at the southern open boundary. Atmospheric forcing included momentum, heat and water fluxes calculated interactively from the Aladin surface fields during ROMS model simulations. Model results were compared with available CTD and ADCP measurements and discussed in the light of the climatological circulation and thermohaline properties of the Adriatic Sea and its coastal areas. Interannual variability in the Adriatic circulation is related to the prevailing atmospheric conditions, changes in the hydrological conditions and water mass exchange at the Otranto Strait. Basic features of the Adriatic circulation - basin-wide cyclonic circulation with several embedded smaller cyclonic gyres around main pits - are well reproduced by ROMS model. Modelled temperatures and salinities are within corresponding seasonal intervals, although measured profiles generally indicate stronger stratification than modelled ones. Summer circulation in 2011 with current reversal obtained along the eastern Adriatic coast was related to the sampling results of the early fish stages as well as to ARGO drifter movements. Simulated fields from the Adriatic scale model were used to prescribe the initial and open boundary conditions for the interannual simulation in the middle Adriatic coastal domain.

  12. Consumer's food motives and seafood consumption

    DEFF Research Database (Denmark)

    Nguyen, Thong Tien; Solgaard, Hans Stubbe

    2016-01-01

    The role of personal factors in driving seafood choice behavior was investigated. The individual psychological factors (i.e., food motives) and socio-demographic variables were measured on a national representative sample (n=996) of French adults. The personal factors were used to predict...... consumption frequencies of three typical seafood products (i.e., fish, shrimp and mussels) by estimating ordered probit models. Convenience and weight control are the most important motives driving the seafood consumptions, suggesting that convenience oriented-people choose seafood as meals less regularly...

  13. Occupational allergies in seafood-processing workers.

    Science.gov (United States)

    Jeebhay, Mohamed F; Lopata, Andreas L

    2012-01-01

    Global increased demand for seafood and its products has been associated with a concomitant rise in fishing, aquaculture, and processing activities. This increased harvesting of seafood is associated with more frequent reporting of allergic health problems among seafood processors. This review outlines the high-risk working populations, work processes, as well as host and environmental exposure risk factors for occupational respiratory and skin allergies. It also provides insights into the major and minor allergens as well as the pathophysiological mechanisms implicated. Diagnostic and preventive approaches are outlined in managing work-related allergy associated with seafood processing.

  14. Current levels of primary polybrominated diphenyl ethers (PBDEs) in Norwegian seafood

    Energy Technology Data Exchange (ETDEWEB)

    Bethune, C.; Nielsen, J.; Julshamn, K. [National Institute of Nutrition and Seafood Research, Bergen (Norway)

    2004-09-15

    The brominated flame retardants (BFRs) represent major industrial chemicals whose use has increased dramatically over the past few decades. Polybrominated diphenyl ethers (PBDEs) are BFRs that are used in many types of consumer products. PBDEs have come to the attention of regulators and scientists due to their bioaccumulation, increasing exposure and persistence in the environment, and adverse health effects in animals and humans. Although PBDE contamination in marine fish was first detected in Sweden in 1979, and certain PBDEs are now banned as of this year, the European Union has yet to establish regulations on PBDE levels in either feed or seafood. The determination of these contaminants in consumer seafood is important for dietary exposure assessment and protection of human health. This study reports on the levels of 6 prominent PBDE congeners (28, 47, 99, 100, 153, and 154) in a selection of common Norwegian seafood.

  15. Product modelling in the seafood industry

    DEFF Research Database (Denmark)

    Jonsdottir, Stella; Vesterager, Johan

    1997-01-01

    assessments, speed up the process and ensure a constant renewal of the seafood products. The objective, therefore, is to estimate the suitability of the CE, and especially CE through product modelling, in the seafood industry as a means to obtain an integration of the entire chain, i.e., a business and market...... based integration obtained by the CE approach and tools. It is described how the knowledge and information of a seafood product can be modelled by using object oriented techniques.......The paper addresses the aspects of Concurrent Engineering (CE) as a means to obtain integrated product development in the seafood industry. It is assumed that the future New Product Development (NPD) in seafood industry companies will shift from being retailer driven and reactive to be more company...

  16. Does consumption of different categories of seafood affect birthweight? The HUMIS study

    Energy Technology Data Exchange (ETDEWEB)

    Fristad, R.F.; Eggesboe, M.; Stigum, H.; Magnus, P. [Norwegian Inst. of Public Health, Oslo (Norway)

    2004-09-15

    Seafood is an important part of a healthy diet. Polyunsaturated fatty acids present in seafood play an essential role in the development of the central nervous system, of special importance to the brain development. The long chain n-3 fatty acids have also been reported to increase gestational length. Fish intake during pregnancy has been associated with both increased birthweight and gestational length. Birthweight is considered to be a predictor of a number of disorders in infant and adult life. However, negative effects may arise in connection with fish and shellfish intake. Seafood can be a major source of environmental contaminants, and correspondingly, adverse effects on pregnancy outcomes have been reported. In contrast, in a publication review carried out on the relationship between PCBs and related chemicals on several pregnancy outcomes, Kimbrough and Krouskas claim that none of the reviewed studies provided evidence on the existence of adverse effects on birthweight. Distinction between consumption of different types of seafood and its relation to pregnancy outcomes is scarce in the literature. Since the source of environmental contaminants is mainly in the marine fat, and that fat content potentially differ in the various categories of seafood items, it is plausible that different categories of seafood may have distinct health effects on fetal growth and gestational length. The objective of this study was to investigate the consumption of three major categories of seafood (fatty fish, lean/half-fatty fish and shellfish), potentially differing in their content of environmental toxicants, and its effects on pregnancy outcomes, specifically, birthweight and gestational length.

  17. Probabilistic intake assessment of multiple compounds as a tool to quantify the nutritional-toxicological conflict related to seafood consumption.

    Science.gov (United States)

    Sioen, Isabelle; Van Camp, John; Verdonck, Frederik; Verbeke, Wim; Vanhonacker, Filiep; Willems, Jan; De Henauw, Stefaan

    2008-04-01

    Seafood represents a natural source of valuable nutrients (e.g., long chain omega-3 poly-unsaturated fatty acids (LC n-3 PUFAs), vitamin D, and iodine), but the favourable health perception is troubled by the presence of contaminants (e.g., PCBs, dioxin-like compounds, and (methyl) mercury (MeHg)). This dualism forms the basis for an important public health conflict. The objective of this study was to calculate and evaluate the simultaneous intake of multiple beneficial and harmful compounds (LC n-3 PUFAs, vitamin D, iodine, (Me)Hg, PCBs, and dioxin-like compounds) via seafood consumption in Belgium. A methodology and a software module were developed for executing probabilistic assessments of the simultaneous intake of multiple compounds leading to better insight in the problematic nature of food items involving both health benefits and risks. The simulations concerning seafood consumption in Belgium predicted that, as far as only seafood consumption is concerned, the considered populations do not reach a sufficiently high intake for the three nutrients considered (LC n-3 PUFAs, vitamin D, and iodine). Regarding the contaminants, (Me)Hg contamination of seafood on the Belgian market does not seem to be an issue of major toxicological concern. In contrast, for dioxin-like compounds the tolerable daily intake is reached by people with high seafood consumption.

  18. Statement: Presence of microplastics and nanoplastics in food, with particular focus on seafood

    NARCIS (Netherlands)

    Hoogenboom, L.A.P.

    2016-01-01

    Following a request from the German Federal Institute for Risk Assessment (BfR), the EFSA Panel for Contaminants in the Food Chain was asked to deliver a statement on the presence of microplastics and nanoplastics in food, with particular focus on seafood. Primary microplastics are plastics original

  19. Rapid Determination of Mercury in Seafood in an Introductory Environmental Science Class

    Science.gov (United States)

    Rice, Jeanette K.; Jenkins, J. David; Manley, A. Citabria; Sorel, Eric; Smith, C. Jimmy

    2005-01-01

    An experiment is described which allows easy, rapid determination of mercury levels in commercially seafood samples from a contaminated area. Students gain experience in the preparation of a calibration curve, the determination of unknown concentrations, and risk assessment based on experimentally determined data.

  20. 2008-2010年上海市夏秋季市售海产品中副溶血性弧菌污染监测结果分析%Analysis on the contamination of seafoods caused by Vibrio parahaemolyticus during summer and autumn in 2008-2010 in Shanghai markets

    Institute of Scientific and Technical Information of China (English)

    彭少杰; 田明胜; 王颖; 郑雷军; 张磊; 李洁

    2011-01-01

    目的 了解上海市夏秋季节市售海产品中副溶血性弧菌的污染水平和特征.方法 2008-2010年5-10月,采用GB/T 4789.7-2008《食品卫生微生物学检验副溶血性孤菌检验》方法,对上海市批发市场、集贸市场、卖场超市和餐饮单位等污染物监测点的市售海产品进行副溶血性弧菌的定性和定量检测.结果 共监测市售海产品941件,副溶血性弧菌总体检出率为13.2%,不同种类、不同监测月份和不同采样地点的海产品,其副溶血性弧菌检出率和样品几何平均浓度总体上差异有统计学意义(P<0.05).其中,海产虾类副溶血性弧菌检出率(25.0%)和样品几何平均浓度(5.0 MPN/g)显著高于其他类海产品(P<0.05);8月份海产品副溶血性弧菌检出率(27.4%)和样品几何平均浓度(3.3 MPN/g)显著高于其他监测月份(P<0.05);集贸市场副溶血性弧菌检出率(28.5%)和批发市场样品几何平均浓度(3.9 MPN/g)显著高于其他采样地点(P<0.05).结论 上海市市售海产品中副溶血性孤菌的污聚率较高,应进一步开展海产品中副溶血性弧菌的风险监测和评估,并针对副溶血性弧菌污染的高风险环节开展监管.%Objective To investigate and characterize the contamination of seafoods caused by Vibrio parahaemolyticus in Shanghai markets. Methods Based on the method of GB/T 4789. 7-2008 Microbiological Examination of Food Hygiene: Examination of V. Parahaemolyticus , the contamination of seafoods caused by V. Parahaemolyticus from different predetermined monitoring sites in Shanghai was qualitatively and quantitatively determined. Results A total of 941 seafood samples from wholesale markets, farmers' markets, supermarkets and catering industries were collected from May to October in the years of 2008 to 2010. V. Parahaemolyticus was found in 124 samples ( 13. 2% ). The detection rates and geometric mean densities of V. Parahaemolyticus were different

  1. Scientific Opinion on health benefits of seafood (fish and shellfish consumption in relation to health risks associated with exposure to methylmercury

    Directory of Open Access Journals (Sweden)

    EFSA Panel on Dietetic Products, Nutrition and Allergies (NDA

    2014-07-01

    Full Text Available Following a request from the European Commission to address the risks and benefits as regards fish/seafood consumption related to relevant beneficial substances (e.g. nutrients such as n-3 long-chain polyunsaturated fatty acids and the contaminant methylmercury, the Panel on Dietetic Products, Nutrition and Allergies (NDA was asked to deliver a Scientific Opinion on health benefits of seafood consumption in relation to health risks associated with exposure to methylmercury. In the present Opinion, the NDA Panel has reviewed the role of seafood in European diets and evaluated the beneficial effects of seafood consumption in relation to health outcomes and population subgroups that have been identified by the FAO/WHO Joint Expert Consultation on the Risks and Benefits of Fish Consumption and/or the EFSA Panel on Contaminants in the context of a risk assessment related to the presence of mercury and methylmercury in food as relevant for the assessment. These included the effects of seafood consumption during pregnancy on functional outcomes of children’s neurodevelopment and the effects of seafood consumption on cardiovascular disease risk in adults. The Panel concluded that consumption of about 1‑2 servings of seafood per week and up to 3‑4 servings per week during pregnancy has been associated with better functional outcomes of neurodevelopment in children compared to no consumption of seafood. Such amounts have also been associated with a lower risk of coronary heart disease mortality in adults and are compatible with current intakes and recommendations in most of the European countries considered. These associations refer to seafood per se andinclude beneficial and adverse effects of nutrients and non-nutrients (i.e. including contaminants such as methylmercury contained in seafood. No additional benefits on neurodevelopmental outcomes and no benefit on coronary heart disease mortality risk might be expected at higher intakes.

  2. Seafood consumption among pregnant and non-pregnant women of childbearing age in the United States, NHANES 1999–2006

    Directory of Open Access Journals (Sweden)

    Hilda Razzaghi

    2014-06-01

    Full Text Available Objectives: Long-chain polyunsaturated fatty acids found in seafood are essential for optimal neurodevelopment of the fetus. However, concerns about mercury contamination of seafood and its potential harm to the developing fetus have created uncertainty about seafood consumption for pregnant women. We compared fish and shellfish consumption patterns, as well as their predictors, among pregnant and non-pregnant women of childbearing age in the US. Methods: Data from 1,260 pregnant and 5,848 non-pregnant women aged 16–49 years from the 1999 to 2006 National Health and Nutrition Examination Survey (NHANES were analyzed. Frequency and type of seafood consumed and adjusted associations of multiple characteristics with seafood consumption were estimated for pregnant and non-pregnant women, separately. Time trends were also examined. Results: There were no significant differences in the prevalence of fish or shellfish consumption, separately or combined, between pregnant and non-pregnant women using either the 30-day questionnaire or the Day 1, 24-h recall. Seafood consumption was associated with higher age, income, and education among pregnant and non-pregnant women, and among fish consumers these groups were more likely to consume ≥3 servings in the past 30 days. Tuna and shrimp were the most frequently reported fish and shellfish, respectively, among both pregnant and non-pregnant women. We observed no significant time trends. Conclusion: There were no differences in seafood consumption between pregnant and non-pregnant women, and the factors related to seafood consumption were similar for both groups. Our data suggest that many women consume less than the recommended two servings of seafood a week.

  3. Organotin levels in seafood and its implications for health risk in high-seafood consumers

    Energy Technology Data Exchange (ETDEWEB)

    Guerin, T. [Agence francaise de securite sanitaire des aliments - Afssa, Unites CIME et PASER, AFSSA-LERQAP, 23 Av. du G. de Gaulle, 94706 Maisons-Alfort Cedex (France)], E-mail: t.guerin@afssa.fr; Sirot, V.; Volatier, J.-L.; Leblanc, J.-C. [Agence francaise de securite sanitaire des aliments - Afssa, Unites CIME et PASER, AFSSA-LERQAP, 23 Av. du G. de Gaulle, 94706 Maisons-Alfort Cedex (France)

    2007-12-15

    Fish and fishery products are considered as the main source of organotin compounds (OTC). Unfortunately, little national contamination data is available to assess food exposure of organotins from French consumers. To provide a more accurate estimate of risks to human health, the butyltin, phenyltin and octyltin compounds sampling in four French coastal areas were measured in 159 composite samples (96 fresh and frozen fish, 28 mollusks, 14 crustaceans, 1 echinoderm, 11 canned foods, 4 smoked fish, 5 prepared seafood-based dishes) by capillary gas chromatography coupled with a microwave induced plasma atomic-emission spectrometer (CGC-MIP-AES). In these samples, butyltins were usually predominant and the range of the contamination levels was generally below those of earlier studies (fish: mean 5.6; min-max 1.1-23 {mu}g/kg; fishery products: mean 6; min-max 0.8-14 {mu}g/kg). Fish, especially tuna, salmon, mackerel, saithe/coalfish and cod were largely the main contributors (38%) to the total organotin exposure. With the supplementary contribution of great scallop, surimi, squid and oysters, the exposure exceeded 50% in all. However, the utmost OTC exposure was lesser than 47% of the provisional tolerable weekly intake [EFSA (European Food Safety Agency). Opinion of the Scientific Panel on Contaminants in the food chain on a request from the Commission to assess the health risks to consumers associated with exposure to organotins in foodstuffs. (Question N{sup o}EFSA-Q-2003-110). The EFSA Journal, 102, 1-119, 2004. (http://www.efsa.eu.int)]. Nobody would exceed this limit. Finally, as this study has some limitations and since some other sources and health effects have not been clearly evaluated, it appears rational from public health and environmental viewpoints to continue to reduce the OTC levels in the environment.

  4. Seafood consumption among Chinese coastal residents and health risk assessment of heavy metals in seafood.

    Science.gov (United States)

    Zhao, Ran; Yan, Shuangshuang; Liu, Min; Wang, Bi; Hu, Dong; Guo, Dongbei; Wang, Juan; Xu, Wanting; Fan, Chun

    2016-08-01

    The aims of the present study were to obtain the seafood dietary patterns of coastal residents, to determine the concentrations of heavy metals, and to evaluate the possible health risks caused by seafood intake. The daily food intakes of 24 types of seafood were collected from 738 participants from Xiamen, a southern Chinese coastal city, using food frequency questionnaire (FFQ) and dietary history method. One hundred and fifty-six samples of 14 types of highest intake seafood were collected from local markets for lead (Pb), cadmium (Cd), chromium (Cr), mercury (Hg), and arsenic (As) determination. Health risks via seafood consumption were evaluated by calculating the target hazard quotient (THQ) and the total hazard index (HI) for carcinogenic and non-carcinogenic effects recommended by the US Environmental Protection Agency. The results showed that the seafood daily intake of Xiamen residents was 61.5 (2.14, 115) g/day. The concentrations of Pb, Cd, Cr, Hg, and As in seafood were ND-0.45 mg/kg, ND-0.19 mg/kg, ND-0.80 mg/kg, ND-0.70 mg/kg, and 0.32-16.9 mg/kg, respectively. Concentrations of Cd and As in some samples were higher than national limitation standards. Consumption of 14 common types of seafood would not pose non-carcinogenic risk. However, some types, such as sparuslatus, oyster, and porphyra tenera, would form a carcinogenic risk. Regardless of a carcinogenic or non-carcinogenic risk, As posed the highest risk on humans. The observed HI value for non-carcinogenic effect of all metals in all seafood reached 0.69-2.20, and the metal orders of risk can be listed as As > Hg > Cr > Cd > Pb, reiterating the risk of As is a matter of concern in seafood from Xiamen markets.

  5. Concurrent Engineering in seafood product development

    DEFF Research Database (Denmark)

    Jonsdottir, Stella; Vesterager, Johan; Børresen, Torger

    1998-01-01

    Concurrent Engineering (CE) can provide an improved approach to product development for extending the lines of seafood products. Information technology support tools based on product models can provide an integrated and simultaneous approach for specifying new recipes. The seafood industry can...... benefit from the CE approach which can support product developers to provide concurrent specifications for raw materials, ingredients, packaging, and production methods. The approach involves the use of product models from which line extensions are more easily generated than by use of customary stepwise...

  6. Demographic Profiles, Mercury, Selenium, and Omega-3 Fatty Acids in Avid Seafood Consumers on Long Island, NY.

    Science.gov (United States)

    Monastero, Rebecca; Karimi, Roxanne; Silbernagel, Susan; Meliker, Jaymie

    2016-02-01

    Seafood consumption is known to confer nutritional benefits and risks from contaminant exposure. Avid seafood consumers are neither well-characterized with regard to their demographic profile nor their underlying risk-benefit profile. Contaminants [e.g., mercury (Hg)] and nutrients [e.g., selenium (Se), omega-3 fatty acids] are prevalent in some seafood. Participants (N = 285) recruited on Long Island, NY, completed food frequency and health questionnaires and received blood draws analyzed for Hg, omega-3s, and Se. Participants were categorized based on frequency and type of seafood consumption. Logistic regression analyses evaluated relationships between seafood consumption and demographics, and were age- and sex-adjusted. t tests assessed relationships between seafood consumption patterns and biomarkers Hg, omega-3s, and Se. Consumption of both tuna and salmon was associated with older age: those aged 55-75 and over 75 years old were more likely than participants aged 18-34 to eat tuna and salmon (OR 2.27; 95% CI 1.05, 4.89 and OR 3.67; 95% CI 1.20, 11.20, respectively). Males were less likely than females to eat fish other than tuna or salmon (OR 0.58; 95% CI 0.34, 0.97). Caucasians were more likely to consume tuna (OR 0.31; 95% CI 0.10, 0.96) or salmon and tuna (OR 0.34; 95% CI 0.12, 0.91), while non-Caucasians were more likely to consume other fish types (OR 2.73; 95% CI 1.45, 5.12). Total blood Hg was associated with weekly consumption of any type of fish (p = 0.01) and with salmon and tuna consumption (p = 0.01). Salmon was associated with plasma omega-3s (p = 0.01). Se was not associated with fish intake categories. Risk communicators can use these findings to influence seafood preferences of different demographic groups.

  7. Diurnal internal tides detected in the Adriatic

    Energy Technology Data Exchange (ETDEWEB)

    Mihanovic, H. [Hydrographic Inst. of the Republic of Croatia, Split (Croatia); Orlic, M.; Pasaric, Z. [Andrija Mohorovicic Geophysical Inst., Univ. of Zagreb (Croatia)

    2006-07-01

    Strong diurnal oscillations, documented by temperature data that were collected along a submarine cliff on the Lastovo Island (southern Adriatic), are studied and compared with sea level and wind measurements at Dubrovnik and Komiza (island of Vis). Three thermistors were deployed at the depths of 15, 22 and 36 m between March 2001 and March 2002. Pronounced diurnal temperature oscillations were detected at 15 and 22 m during the stratified season. The correlation between the sea surface and thermocline displacements was highest in June 2001, when diurnal wind changes were not significant, while diurnal sea level oscillations achieved annual maxima. Thermocline oscillations were in phase with sea level changes. The range of diurnal sea surface variability was close to 19 cm, while the range of corresponding thermocline variability was about 5.4 m. The findings summarize the outcome of the first dedicated study of internal tides in the Adriatic. (orig.)

  8. Statement on the presence of microplastics and nanoplastics in food, with particular focus on seafood

    DEFF Research Database (Denmark)

    Petersen, Annette

    Following a request from the German Federal Institute for Risk Assessment (BfR), the EFSA Panel for Contaminants in the Food Chain was asked to deliver a statement on the presence of microplastics and nanoplastics in food, with particular focus on seafood. Primary microplastics are plastics...... originally manufactured to be that size, while secondary microplastics originate from fragmentation. Nanoplastics can originate from engineered material or can be produced during fragmentation of microplastic debris. Microplastics range from 0.1 to 5,000 μm and nanoplastics from approximately 1 to 100 nm (0.......001–0.1 μm). There is no legislation for microplastics and nanoplastics as contaminants in food. Methods are available for identification and quantification of microplastics in food, including seafood. Occurrence data are limited. In contrast to microplastics no methods or occurrence data in food...

  9. A content analysis of Internet resources about the risks of seafood consumption.

    Science.gov (United States)

    Henderson, Heather C; Hong, Jie; Friedman, Daniela B; Porter, Dwayne E; Halfacre, Angela C; Scott, Geoffrey I; Lead, Jamie R

    2016-08-01

    Seafood consumption is a main source of human exposure to certain environmental contaminants. Therefore, it is valuable to assess the online health risk messages focused on this topic, as people in the US are increasingly accessing the Internet for health-related information. Previous research indicates that online health information tends to be written at a reading level that is more advanced than ability of the general population. The purpose of this research was to examine the content and readability of Internet resources targeted toward consumers in the US regarding the health risks from consumption of contaminated seafood. Sources for analysis were gathered through a targeted search of state and national government websites, as well as through a Google search. The overall mean readability level was Grade 9.21, which is slightly above the average reading level of US adults. Future research should evaluate the accuracy of the health risk messages, as well as consumer perceptions of risk.

  10. Control of indigenous pathogenic bacteria in seafood

    DEFF Research Database (Denmark)

    Huss, Hans Henrik

    1997-01-01

    The pathogenic bacteria indigenous to the aquatic and general environment are listed. Their distribution in nature, prevalence in seafood and the possibilities for growth of these organisms in various types of products are outlined These data, combined with what is known regarding the epidemiology...

  11. Biogenic amines in raw and processed seafood

    Directory of Open Access Journals (Sweden)

    Pierina eVisciano

    2012-06-01

    Full Text Available The presence of biogenic amines in raw and processed seafood, associated with either time/temperature conditions or food technologies is discussed in the present paper from a safety and prevention point of view. In particular, storage temperature, handling practices, presence of microbial populations with decarboxylase activity and availability of free amino acids are considered the most important factors affecting the production of biogenic amines in raw seafood. On the other hand, some food technological treatments such as salting, ripening, fermentation or marination can increase the levels of biogenic amines in processed seafood. The consumption of high amount of biogenic amines, above all histamine, can result in food borne poisoning which is a worldwide problem. The European Regulation established as maximum limits for histamine, in fishery products from fish species associated with high histidine amounts, values ranging from 100 to 200 mg/kg, while for products which have undergone enzyme maturation treatment in brine, the aforementioned limits rise to 200 and 400 mg/kg. Preventive measures and emerging methods aiming at controlling the production of biogenic amines are also reported for potential application in seafood industries.

  12. Presence of microplastics and nanoplastics in food, with particular focus on seafood

    OpenAIRE

    EFSA Panel on Contaminants in the Food Chain (CONTAM); Hogstrand, Christer

    2016-01-01

    Following a request from the German Federal Institute for Risk Assessment (BfR), the EFSA Panel for Contaminants in the Food Chain was asked to deliver a statement on the presence of microplastics and nanoplastics in food, with particular focus on seafood. Primary microplastics are plastics originally manufactured to be that size, while secondary microplastics originate from fragmentation. Nanoplastics can originate from engineered material or can be produced during fragmentation of microplas...

  13. Statement on the presence of microplastics and nanoplastics in food, with particular focus on seafood

    OpenAIRE

    Petersen, Annette

    2016-01-01

    Following a request from the German Federal Institute for Risk Assessment (BfR), the EFSA Panel for Contaminants in the Food Chain was asked to deliver a statement on the presence of microplastics and nanoplastics in food, with particular focus on seafood. Primary microplastics are plastics originally manufactured to be that size, while secondary microplastics originate from fragmentation. Nanoplastics can originate from engineered material or can be produced during fragmentation of microplas...

  14. Detection and differentiation of Vibrio spp. in seafood and fish samples with cultural and molecular methods.

    Science.gov (United States)

    Messelhäusser, U; Colditz, J; Thärigen, D; Kleih, W; Höller, C; Busch, U

    2010-09-01

    Vibrio spp. as natural inhabitants of sea- and brackwater of both tropical and temperate regions of the world are commonly found in different kinds of seafood. Even among the three main human pathogenic species Vibrio parahaemolyticus, Vibrio cholerae and Vibrio vulnificus most of the isolates from seafood do not carry the different virulence factors responsible for foodborne infections. Therefore, the risk assessment of Vibrio spp. in seafood is currently based mainly on the knowledge of the genetic setting of foodborne strains. For the detection and differentiation of Vibrio spp. (V. parahaemolyticus, V. cholerae and V. vulnificus) three probe-based multiplex real-time PCR systems were developed and validated. One real-time PCR system simultaneously detects V. parahaemolyticus, V. cholerae and V. vulnificus on genus level combined with an Internal Amplification Control. The detection limit for the system was between 1cfu/mL and 10cfu/mL in pure culture and in different artificially contaminated sample material, e. g. prawns or Alaska Pollock. The other two PCR systems were implemented for the detection of different virulence genes of V. parahaemolyticus and V. cholerae isolates. The molecular detection systems were applied for the investigation of 338 raw and cooked seafood and fish samples for the presence of the different Vibrio spp. The collected data indicate that the PCR systems can be useful for rapid detection and differentiation of Vibrio spp. in different food matrices as basis for a preventive consumer protection policy.

  15. Microbiological Quality of Seafood Marketed in Taiwan.

    Science.gov (United States)

    Wong, Hin-Chung; Jiang, Huai-Yu; Lin, Hsu-Yang; Wang, Yu-Ting

    2015-11-01

    Seafood is often associated with foodborne illnesses, and Vibrio parahaemolyticus is the most common pathogen implicated in outbreaks in Taiwan. In this study, the microbiological quality of 300 raw or mixed ready-to-eat (RTE) and other cooking-needed seafood samples was examined. The total aerobic and coliform counts of the RTE samples were significantly higher than those of other cooking-needed samples. On average, 55.8 and 29.7% of the RTE samples failed to meet the local microbiological standards for total aerobic (5 log CFU/g) and coliform (3 log most probable number [MPN] per g), counts respectively; the corresponding percentages for the RTE samples from Taipei City were 9.1 and 18.2%, respectively. The total aerobic and coliform counts in the RTE samples from supermarkets and chain restaurants were significantly lower than those from traditional restaurants. The Vibrio species were more frequently identified in the cooking-needed samples than in RTE samples. Low incidences of V. parahaemolyticus (1.4%), V. vulnificus (1.9%), and V. cholerae (0%) were detected in most RTE samples. High densities of V. parahaemolyticus and V. vulnificus (1,200 MPN/g) were detected in a few RTE samples, only one of which contained toxigenic (tdh(+)) V. parahaemolyticus. The results of this investigation reveal that better hygiene of seafood providers such as chain restaurants, supermarkets, and traditional restaurants in Taipei City would effectively improve the microbiological quality of the seafood. The results will facilitate the establishment of measures for controlling the risks associated with seafood in Taiwan.

  16. Occurrence of halogenated flame retardants in commercial seafood species available in European markets.

    Science.gov (United States)

    Aznar-Alemany, Òscar; Trabalón, Laura; Jacobs, Silke; Barbosa, Vera Liane; Tejedor, Margarita Fernández; Granby, Kit; Kwadijk, Christiaan; Cunha, Sara C; Ferrari, Federico; Vandermeersch, Griet; Sioen, Isabelle; Verbeke, Wim; Vilavert, Lolita; Domingo, José L; Eljarrat, Ethel; Barceló, Damià

    2016-12-24

    PBDEs (congeners 28, 47, 99, 100, 153, 154, 183, 209), HBCD (α, β, γ), emerging brominated flame retardants (PBEB, HBB and DBDPE), dechloranes (Dec 602, 603, 604, syn- and anti-DP), TBBPA, 2,4,6-TBP and MeO-PBDEs (8 congeners) were analysed in commercial seafood samples from European countries. Levels were similar to literature and above the environmental quality standards (EQS) limit of the Directive 2013/39/EU for PBDEs. Contaminants were found in 90.5% of the seafood samples at n. d.-356 ng/g lw (n. d.-41.1 ng/g ww). DBDPE was not detected and 2,4,6-TBP was detected only in mussels, but at levels comparable to those of PBDEs. Mussel and seabream were the most contaminated species and the Mediterranean Sea (FAO Fishing Area 37) was the most contaminated location. The risk assessment revealed that there was no health risk related to the exposure to brominated flame retardants via seafood consumption. However, a refined risk assessment for BDE-99 is of interest in the future. Moreover, the cooking process concentrated PBDEs and HBB.

  17. Determination of factors affecting seafood consumption pattern and consumption frequency

    Directory of Open Access Journals (Sweden)

    Mustafa Tolga Tolon

    2016-08-01

    Full Text Available Current seafood consumption pattern, consumer profile and factors affecting seafood consumption amount and frequency of the consumers residing in coastal region (İzmir, mixed region (Adana and countryside region (Ankara of Turkey were researched in this study. It is aimed to provide source to researchers and relevant institutions who are willing to guide the future sectoral initiatives and conduct more extensive research on seafood consumer habits. In this context, the research population was determined according to their distance to the sea and their populations by purposive sampling method. 43 % of total 400 survey was conducted in Ankara, 36% in İzmir and 21% in Adana by face to face interviews. According to the survey results, 6% of respondents never consume seafood, 25% once a month, 28% once every two weeks, and 42% consume once and more than once in a week. The most seafood consumption frequency was identified in Izmir. Nearly 90% of consumers in the entire regions prefer to consume seafood in fresh type. According to the answers of all consumers 4 major factors affecting seafood consumption preferences and habits in a negative way were "high price, cannot be easily found in the market, not recognition of seafood varieties and disfavor of the flavor of seafood". The relationship between frequency of seafood consumption and education level of consumer’s variables is determined as linear and strong but the relationship between consumer age and seafood consumption frequency is determined as reverse. On the factors affecting choice of seafood consumption in a positive way, 71% of consumers stated the beneficial to health perception and taste of seafood as the most important reason for their preference. Therefore, the relationship between consumption trend and beneficial to health perception of seafood is determined as linear and strong.

  18. Seasonal and interannual variations in pigments in the Adriatic Sea

    Indian Academy of Sciences (India)

    Mira Morović

    2002-09-01

    Spatial and temporal variability of pigments was studied from the CZCS satellite data and from in situ chlorophyll and transparency for the period 1979-1985. The three Adriatic sites, Northern, Middle, and Southern Adriatic are differently in oceanographic parameters. The differences between seasonal in situ chlorophyll and remotely sensed pigment concentrations (from CZCS satellite data) from the Adriatic are large in winter. Through the correlation analysis, pigments were compared to meteo-oceanographic and hydrological parameters from different Adriatic sites. The PCA (principal component analysis) was applied to the pigment data series and significant components were compared. Different correlations are obtained for warm and cold periods of the year pointing to seasonal differences in the underlying mechanism of pigment variability. The first PC is in more parameters seem to in field, than in the cold period. The pigments in the Adriatic are in good correlation to a number of hydrologic and meteo-oceanographic factors.

  19. Increased sensitivity in PCR detection of tdh-positive Vibrio parahaemolyticus in seafood with purified template DNA.

    Science.gov (United States)

    Hara-Kudo, Y; Kasuga, Y; Kiuchi, A; Horisaka, T; Kawasumi, T; Kumagai, S

    2003-09-01

    PCR is an important method for the detection of thermostable direct hemolysin gene (tdh)-positive (pathogenic hemolysin-producing) strains of Vibrio parahaemolyticus in seafood because tdh-negative (nonpathogenic) V. parahaemolyticus strains often contaminate seafood and interfere with the direct isolation of tdh-positive V. parahaemolyticus. In this study, the use of PCR to detect the tdh gene of V. parahaemolyticus in various seafoods artificially contaminated with tdh-positive V. parahaemolyticus was examined. PCR was inhibited by substances in oysters, squid, mackerel, and yellowtail but not by cod, sea bream, scallop, short-necked clam, and shrimp. To improve detection, DNA was purified by either the silica membrane method, the glass fiber method, or the magnetic separation method, and the purified DNA was used as the PCR primer template. For all samples, the use of the silica membrane method and the glass fiber method increased detection sensitivity. The results of this study demonstrate that the use of properly purified template DNA for PCR markedly increases the effectiveness of the method in detecting pathogenic tdh-positive V. parahaemolyticus in contaminated seafood.

  20. Raoultella planticola bacteremia following consumption of seafood.

    Science.gov (United States)

    Lam, Philip W; Salit, Irving E

    2014-07-01

    Raoultella planticola is a Gram-negative bacillus commonly found in water, soil and aquatic environments. There have only been 16 cases of R planticola infection documented in the literature to date. R planticola possesses the ability to convert histidine to histamine and can produce symptoms of scombroid poisoning when poorly prepared seafood is consumed in large amounts. The present report describes a case involving a 56-year-old woman who presented with R planticola bacteremia and symptoms consistent with cholangitis four days after consuming a seafood salad containing squid and octopus. She was successfully treated with intravenous ceftriaxone followed by oral ciprofloxacin. Recent chemotherapy, proton pump inhibitor use and altered biliary flow secondary to hepatic metastases may have been contributing factors to the pathogenesis of disease.

  1. Raoultella Planticola Bacteremia Following Consumption of Seafood

    Directory of Open Access Journals (Sweden)

    Philip W Lam

    2014-01-01

    Full Text Available Raoultella planticola is a Gram-negative bacillus commonly found in water, soil and aquatic environments. There have only been 16 cases of R planticola infection documented in the literature to date. R planticola possesses the ability to convert histidine to histamine and can produce symptoms of scombroid poisoning when poorly prepared seafood is consumed in large amounts. The present report describes a case involving a 56-year-old woman who presented with R planticola bacteremia and symptoms consistent with cholangitis four days after consuming a seafood salad containing squid and octopus. She was successfully treated with intravenous ceftriaxone followed by oral ciprofloxacin. Recent chemotherapy, proton pump inhibitor use and altered biliary flow secondary to hepatic metastases may have been contributing factors to the pathogenesis of disease.

  2. Consumer Willingness to Pay for Quality Attributes of Fresh Seafood

    DEFF Research Database (Denmark)

    Nguyen, Thong Tien; Haider, Wolfgang; Solgaard, Hans Stubbe

    2015-01-01

    We applied a labeled choice experiment (LCE) to investigate consumer demand and choice behavior for fresh seafood in a retail market. The LCE was conducted for a large number of seafood alternatives (i.e., seafood species) labeled by the respective seafood name (e.g., cod, salmon, mussels). Consu...... allows respondents to evaluate choice alternatives through both attribute judgment and alternative comparison. Exploring a variety of product alternatives is also meaningful to firms with multiple products (e.g., fresh seafood retailers) or firms with many direct competitors......., production method, and country of origin), and the rank ordered-intrinsic value were estimated for each seafood alternative within classes and the entire market. The WTP estimate in our study is expected to be more accurate than those derived from studies based on single product alternatives because the LCE...

  3. EFSA NDA Panel (EFSA Panel on Dietetic Products, Nutrition and Allergies), 2014. Scientific Opinion on health benefits of seafood (fish and shellfish) consumption in relation to health risks associated with exposure to methylmercury

    DEFF Research Database (Denmark)

    Tetens, Inge

    Following a request from the European Commission to address the risks and benefits as regards fish/seafood consumption related to relevant beneficial substances (e.g. nutrients such as n-3 long-chain polyunsaturated fatty acids) and the contaminant methylmercury, the Panel on Dietetic Products, N....... No additional benefits on neurodevelopmental outcomes and no benefit on coronary heart disease mortality risk might be expected at higher intakes......., Nutrition and Allergies (NDA) was asked to deliver a Scientific Opinion on health benefits of seafood consumption in relation to health risks associated with exposure to methylmercury. In the present Opinion, the NDA Panel has reviewed the role of seafood in European diets and evaluated the beneficial...... of mercury and methylmercury in food as relevant for the assessment. These included the effects of seafood consumption during pregnancy on functional outcomes of children’s neurodevelopment and the effects of seafood consumption on cardiovascular disease risk in adults. The Panel concluded that consumption...

  4. Occurrence of halogenated flame retardants in commercial seafood species available in European markets

    DEFF Research Database (Denmark)

    Aznar-Alemany, Òscar; Trabalón, Laura; Jacobs, Silke

    2017-01-01

    PBDEs (congeners 28, 47, 99, 100, 153, 154, 183, 209), HBCD (α, β, γ), emerging brominated flame retardants (PBEB, HBB and DBDPE), dechloranes (Dec 602, 603, 604, syn- and anti-DP), TBBPA, 2,4,6-TBP and MeO-PBDEs (8 congeners) were analysed in commercial seafood samples from European countries....... Levels were similar to literature and above the environmental quality standards (EQS) limit of the Directive 2013/39/EU for PBDEs. Contaminants were found in 90.5% of the seafood samples at n. d.-356 ng/g lw (n. d.-41.1 ng/g ww). DBDPE was not detected and 2,4,6-TBP was detected only in mussels...

  5. Eco-Labeled Seafood: Determinants for (Blue Green Consumption

    Directory of Open Access Journals (Sweden)

    Malin Jonell

    2016-09-01

    Full Text Available Eco-certification has become an increasingly popular market-based tool in the endeavor to reduce negative environmental impacts from fisheries and aquaculture. In this study, we aimed at investigating which psychological consumer characteristics influence demand for eco-labeled seafood by correlating consumers’ stated purchasing of eco-labeled seafood to nine variables: environmental knowledge regarding seafood production, familiarity with eco-labels, subjective knowledge, pro-environmental self-identification, sense of personal responsibility, concern for negative environmental impacts from seafood production, perceived consumer effectiveness, gender and education. Questionnaires were distributed to consumers in Stockholm, Sweden, and the data were tested with multiple regression analysis using linear modeling and model averaging (n = 371. Two variables were the best predictors of stated purchasing of eco-labeled seafood: (i recognition and understanding of eco-labels for seafood (Marine Stewardship Council, Fish for Life, Aquaculture Stewardship Council and KRAV; and (ii concern for negative environmental impacts associated with seafood production. Meanwhile, consumer environmental knowledge was a weaker predictor. Results from this study suggest that strengthening the emotional component of consumer decision-making and improving the level of consumer familiarity with seafood eco-labels could stimulate more pro-environmental seafood consumption.

  6. Environmental security of the Adriatic coastal sea floor

    Energy Technology Data Exchange (ETDEWEB)

    Valkovic, V.; Kollar, R. [A.C.T.d.o.o., Prilesje 4, Zagreb (Croatia); Matika, D. [Institute for for Researches and Development of Defense Systems, Zagreb (Croatia); Obhodas, J.; Sudac, D. [Department of Experimental Physics, Institute Ruder Boskovic, Zagreb (Croatia)

    2009-07-01

    The coastal sea floor is littered with many of man made objects and materials including a variety of ammunition. In addition, sediments in ports, harbors and marinas have increased concentrations of chemicals used as biocides in anti-fouling paints. This report presents locations within the Adriatic Sea and Mediterranean as a whole, that are found to be contaminated by different ammunition. In order to be able to establish if an object on the sea floor contains some sort of threat material (explosives, chemical agent), a system using a neutron sensor installed within an unmanned underwater vessel has been developed and tested. When positioned above an object such a system can inspect the object for the presence of a threat material by using alpha particle tagged neutrons from a sealed tube d+t neutron generator and a gamma detector. The same system can also be used to inspect ship hulls, either to detect potential anomalies attached to the hull, or to determine the nature of materials within the hull, especially of sunken ships. (authors)

  7. Bioaccessibility and bioavailability of methylmercury from seafood commonly consumed in North America: In vitro and epidemiological studies.

    Science.gov (United States)

    Siedlikowski, Maia; Bradley, Mark; Kubow, Stan; Goodrich, Jaclyn M; Franzblau, Alfred; Basu, Niladri

    2016-08-01

    Methylmercury (MeHg) is a global contaminant of concern and human exposures are largely realized via seafood consumption. While it is assumed that 95-100% of the ingested MeHg from seafood reaches systemic circulation, recent in vitro studies have yielded results to suggest otherwise. Of the published studies to have characterized the bioaccessibility or bioavailability of MeHg from seafood, only a handful of seafood species have been characterized, there exists tremendous variability in data within and across species, few species of relevance to North America have been studied, and none of the in vitro studies have adapted results to an epidemiology study. The objective of the current study was two-fold: (a) to characterize in vitro MeHg bioaccessibility and bioavailability from ten commonly consumed types of seafood in North America; and (b) to apply the bioaccessibility and bioavailability data from the in vitro study to an existing human MeHg exposure assessment study. Raw seafood samples (cod, crab, halibut, salmon, scallop, shrimp, tilapia, and three tuna types: canned light, canned white, fresh) were purchased in Montreal and their MeHg concentrations generally overlapped with values reported elsewhere. The bioaccessibility of MeHg from these samples ranged from 50.1±19.2 (canned white tuna) to 100% (shrimp and scallop) of the amount measured in the raw undigested sample. The bioavailability of MeHg from these samples ranged from 29.3±10.4 (crab) to 67.4±9.7% (salmon) of the value measured in the raw undigested sample. There were significant correlations between the initial MeHg concentration in seafood with the percent of that Hg that was bioaccessible (r=-0.476) and bioavailable (r=-0.294). When the in vitro data were applied to an existing MeHg exposure assessment study, the estimated amount of MeHg absorbed into systemic circulation decreased by 25% and 42% when considering bioaccessibility and bioavailability, respectively. When the in vitro data

  8. Numerical modelling of an oil spill in the northern Adriatic

    Directory of Open Access Journals (Sweden)

    Marin Paladin

    2012-04-01

    Full Text Available Hypothetical cases of oil spills, caused by ship failure in the northern Adriatic, are analysed with the aim of producing three-dimensional models of sea circulation and oil contaminant transport. Sea surface elevations, sea temperature and salinity fields are applied as a forcing argument on the model's open boundaries.The Aladin-HR model with a spatial resolution of 8 km and a time interval of 3 hours is used for atmospheric forcing. River discharges along the coastline in question are introduced as point source terms and are assumed to have zero salinity at their respective locations. The results of the numerical modelling of physical oceanography parameters are validated by measurements carried out in the ‘Adriatic Sea monitoring programme’ in a series of current meter and CTD stations in the period from 1 January 2008 to 15 November 2008.The oil spill model uses the current field obtained from a circulation model.Besides the convective dispersive transport of oil pollution (Lagrangian model of discrete particles, the model takes into account a number of reactive processes such as emulsification, dissolution, evaporation and heat balance between the oil,sea and atmosphere. An actual event took place on 6 February 2008,when the ship `Und Adriyatik' caught fire in the vicinity of the town of Rovinj (Croatia en route from Istanbul (Turkey to Trieste (Italy. At the time the fire broke out, the ship was carrying around 800 tons of oil. Thanks to the rapid intervention of the firedepartment, the fire was extinguished during the following 12 hours,preventing possible catastrophic environmental consequences. Based on this occurrence, five hypothetical scenarios of ship failure with a consequent spill of 800 tons of oil over 12 hours were analysed. The main distinction between the simulated scenarios is the time of the start of the oil spill, corresponding to the times when stronger winds were blowing (>7 m s-1 with a minimum duration of 24 h

  9. Factors favouring large organic production in the northern Adriatic: towards the northern Adriatic empirical ecological model

    Directory of Open Access Journals (Sweden)

    R. Kraus

    2015-06-01

    Full Text Available Influenced by one of the largest Mediterranean rivers, Po, the northern Adriatic production is highly variable seasonally and interannually. The changes are especially pronounced between winters and seemingly reflect on total Adriatic bioproduction of certain species (anchovy. We analysed the long-term changes in the phytoplankton production at the transect in the region, as derived from monthly oceanographic cruises, in relation to concomitant geostrophic currents distribution in the area and in the Po River discharge rates in days preceding the cruises. In winter and early spring the phyto-abundances depended on existing circulation fields, in summer and autumn they were related to 1–15 days earlier Po River discharge rates and on concomitant circulation fields, while in late spring phyto-abundances increased 1–3 days after high Po River discharge rates regardless of circulation fields. During the entire year the phyto-abundances were dependant on forcing of the previous 1–12 months of surface fluxes and/or Po River rates. Large February blooms are, as well as February circulation patterns, precondited by low evaporation rates in previous November. From 1990 to 2004 a shift towards large winter bioproduction induced by circulation changes appeared. Performed investigations represent the preliminary actions in building of an empirical ecological model of the northern Adriatic which can be used in the sustainable economy of the region, however also in validation of the numerical ecological model of the region, which is currently being developed.

  10. Factors favouring large organic production in the northern Adriatic: towards the northern Adriatic empirical ecological model

    Science.gov (United States)

    Kraus, R.; Supić, N.; Precali, R.

    2015-06-01

    Influenced by one of the largest Mediterranean rivers, Po, the northern Adriatic production is highly variable seasonally and interannually. The changes are especially pronounced between winters and seemingly reflect on total Adriatic bioproduction of certain species (anchovy). We analysed the long-term changes in the phytoplankton production at the transect in the region, as derived from monthly oceanographic cruises, in relation to concomitant geostrophic currents distribution in the area and in the Po River discharge rates in days preceding the cruises. In winter and early spring the phyto-abundances depended on existing circulation fields, in summer and autumn they were related to 1-15 days earlier Po River discharge rates and on concomitant circulation fields, while in late spring phyto-abundances increased 1-3 days after high Po River discharge rates regardless of circulation fields. During the entire year the phyto-abundances were dependant on forcing of the previous 1-12 months of surface fluxes and/or Po River rates. Large February blooms are, as well as February circulation patterns, precondited by low evaporation rates in previous November. From 1990 to 2004 a shift towards large winter bioproduction induced by circulation changes appeared. Performed investigations represent the preliminary actions in building of an empirical ecological model of the northern Adriatic which can be used in the sustainable economy of the region, however also in validation of the numerical ecological model of the region, which is currently being developed.

  11. 78 FR 21911 - Proposed Information Collection; Comment Request; Fish and Seafood Promotion; Correction

    Science.gov (United States)

    2013-04-12

    ... Seafood Promotion; Correction AGENCY: National Oceanic and Atmospheric Administration (NOAA), Commerce... 20092) on the proposed information collection, Fish and Seafood Promotion. The information under...

  12. Demands for Modern Shipping and SUiveillance of the Adriatic Sea

    Directory of Open Access Journals (Sweden)

    Martin Lakota

    2006-05-01

    Full Text Available In this work modem navigation and Adriatic control demandcharacteristics are developed. It correlates the modemnavigation characteristics and the Adriatic sea control. Thepresent operating procedures used for sea control are mentionedas well as the new systems and procedures based on newcomputer and communication technologies (automatic identificationsystems, GPS, computer networks, Internet/Intranetstandards. It discusses unmanned aerial vehicles characteristicsaccording to demands and grading standards for picture/scene interpretation (NIIRS grading scale.

  13. Cross-reactivity and masqueraders in seafood reactions.

    Science.gov (United States)

    Banks, Taylor A; Gada, Satyen M

    2013-01-01

    Confounding variables play a significant role in many adverse seafood reactions and a clear understanding of these factors is important in properly characterizing reactions associated with potential masqueraders and mimics. Although the medical literature is replete with reviews of seafood hypersensitivity and reports of cross-reactive and newly characterized allergens, there has not been a recent effort to provide an updated overview of the several processes that may lead clinicians to draw incorrect conclusions in evaluating reported reactions to seafood. Ranging from seafood intoxications to other nonallergic or complex seafood reactions, these events can easily be misconstrued as representing a seafood IgE-mediated allergy. Among these are the more familiar topics of cross-reactivity and scombroid intoxication, and those with a still evolving understanding such as ciguatera fish poisoning and Anisakis reactions. This article seeks to provide an accessible but comprehensive summary of the relevant information surrounding these confounders in assessing adverse reactions to seafood. Such knowledge may be instrumental in unraveling complex or otherwise unclear presentations and aid clinicians in accurately evaluating and managing patients with reported seafood reactions.

  14. Mercury and selenium content of Taiwanese seafood.

    Science.gov (United States)

    Fang, G C; Nam, D H; Basu, N

    2011-01-01

    Fish consumption is avid in Taiwan (and other Asian nations), but little is known about the mercury and selenium content in local seafood. This paper reports on total mercury, methylmercury and selenium levels from 14 commonly consumed seafood items obtained from Taichung, Taiwan. Mean total mercury concentrations varied nearly 100-fold across species. Fifty per cent of the marlins sampled and 35% of the sharks exceeded the 0.3 µg g(-1) US Environmental Protection Agency (USEPA) guideline. Methylmercury comprised a majority of the total mercury in all species. In all species studied there was a molar excess of selenium over mercury. The rank order of mean selenium-mercury molar ratios was red tilapia (166.8) > abura (87.9) > river prawn (82.4) > whiteleg shrimp (64.2) > butterfish (44.6) > milkfish (37.0) > tuna (15.6) > grouper (13.9) > ayu (13.4) > coral hind (13.0) > weever (11.8) > saury (9.0) > shark (7.8) > marlin (4.2).

  15. Selenium Content in Seafood in Japan

    Directory of Open Access Journals (Sweden)

    Haruka Iida

    2013-01-01

    Full Text Available Selenium is an essential micronutrient for humans, and seafood is one of the major selenium sources, as well as red meat, grains, eggs, chicken, liver and garlic. A substantial proportion of the total amount of selenium is present as selenium containing imidazole compound, selenoneine, in the muscles of ocean fish. In order to characterize the selenium content in seafood, the total selenium levels were measured in the edible portions of commercially important fish and shellfish species. Among the tested edible portions, alfonsino muscle had the highest selenium levels (concentration of 1.27 mg/kg tissue. High levels of selenium (1.20–1.07 mg/kg were also found in the salted ovary products of mullet and Pacific herring. In other fish muscles, the selenium levels ranged between 0.12 and 0.77 mg/kg tissue. The selenium levels were closely correlated with the mercury levels in the white and red muscles in alfonsino. The selenium content in spleen, blood, hepatopancreas, heart, red muscle, white muscle, brain, ovary and testis ranged between 1.10 and 24.8 mg/kg tissue in alfonsino.

  16. Modeling the drift of plastics in the Adriatic Basin

    Science.gov (United States)

    Liubartseva, Svitlana; Coppini, Giovanni; Lecci, Rita; Creti, Sergio

    2016-04-01

    Recently, plastic pollution at sea has become widely recognized as an acute environmental problem. Distribution of plastics in the marine environment is controlled by (1) locations and time-varying intensity of inputs; (2) the dynamics of the upper mixed layer of the ocean, where the majority of plastics float; and (3) the sinks of plastics. In the present work, we calculate the plastic concentrations at the sea surface and fluxes onto the coastline (2009-2015) that originated from terrestrial and maritime inputs. We construct a Markov chain model based on coupling the MEDSLIK-II model (De Dominicis et al., 2013) with the daily Adriatic Forecasting System (AFS) ocean currents simulations (1/45° horizontal resolution) (Guarneri et al., 2010) and ECMWF surface wind analyses (0.25° horizontal and 6-h temporal resolutions). We assume that the coastline is the main sink of plastics in the Adriatic Sea (Liubartseva et al., 2015). Our calculations have shown that the mean particle half-life in the basin approximately equals 43.7 days, which allows us to define the Adriatic Sea as a highly dissipative system with respect to floating plastics. On long-term time-mean scales, the most polluted sea surface area (more than 10 g/km2 floating plastics) is represented by an elongated band shifted to the Italian coastline and narrowed from northwest to southeast. That corresponds to the spatial distributions of plastic inputs, and indicates a tight connection with patterns of the general Adriatic circulation, including the Western Adriatic Coastal Current and the South Adriatic gyre. On seasonal time-mean scales, we indicate the winter plastics' expansion into the basin's interior, spring trapping in the northern Adriatic, summer cleansing the middle and southern Adriatic and autumn spreading into the southeastern Adriatic. Distinctive coastal "hot spot" is found on the Po Delta coastline that receives a plastic flux of 70 kg/(kmṡday). Complex source-receptor relationships

  17. Plasma levels of pollutants are much higher in loggerhead turtle populations from the Adriatic Sea than in those from open waters (Eastern Atlantic Ocean).

    Science.gov (United States)

    Bucchia, Matteo; Camacho, María; Santos, Marcelo R D; Boada, Luis D; Roncada, Paola; Mateo, Rafael; Ortiz-Santaliestra, Manuel E; Rodríguez-Estival, Jaime; Zumbado, Manuel; Orós, Jorge; Henríquez-Hernández, Luis A; García-Álvarez, Natalia; Luzardo, Octavio P

    2015-08-01

    In this paper we determined the levels of 63 environmental contaminants, including organic (PCBs, organochlorine pesticides, and PAHs) and inorganic (As, Cd, Cu, Pb, Hg and Zn) compounds in the blood of loggerhead turtles (Caretta caretta) from two comparable populations that inhabit distinct geographic areas: the Adriatic Sea (Mediterranean basin) and the Canary Islands (Eastern Atlantic Ocean). All animals were sampled at the end of a period of rehabilitation in centers of wildlife recovery, before being released back into the wild, so they can be considered to be in good health condition. The dual purpose of this paper is to provide reliable data on the current levels of contamination of this species in these geographic areas, and secondly to compare the results of both populations, as it has been reported that marine biota inhabiting the Mediterranean basin is exposed to much higher pollution levels than that which inhabit in other areas of the planet. According to our results it is found that current levels of contamination by organic compounds are considerably higher in Adriatic turtles than in the Atlantic ones (∑PCBs, 28.45 vs. 1.12ng/ml; ∑OCPs, 1.63 vs. 0.19ng/ml; ∑PAHs, 13.39 vs. 4.91ng/ml; p<0.001 in all cases). This is the first time that levels of PAHs are reported in the Adriatic loggerheads. With respect to inorganic contaminants, although the differences were not as great, the Adriatic turtles appear to have higher levels of some of the most toxic elements such as mercury (5.74 vs. 7.59μg/ml, p<0.01). The results of this study confirm that the concentrations are larger in turtles from the Mediterranean, probably related to the high degree of anthropogenic pressure in this basin, and thus they are more likely to suffer adverse effects related to contaminants.

  18. Quality Evaluation of Some Fresh and Imported Frozen Seafood

    Directory of Open Access Journals (Sweden)

    Fatma Hassan Mohamed Ali

    2011-02-01

    Full Text Available This work was done to evaluate the quality parameters of fresh and imported frozen seafood (fillets and shrimp. A total of 120 seafood samples, fillets and shrimp (fresh and imported frozen 30 each, collected from fish markets at Giza Governorate were sensory, bacteriological, chemical investigated. Panelists rejected 5.0 (16.6% and 0.0 (0.0% of fresh fillets and shrimp samples, while the number raised up to 12.0 (40.0% and 15.0 (50.0% of frozen fillets and shrimp samples respectively. Fresh seafood had a significant lower (p<0.05 pH values in compared to frozen products. There were observed significant difference (p<0.05 in the TBA and TVB-N values between the fresh and frozen seafood samples. All fresh and frozen seafood samples were judge as safe food from microbiological point of view. The total proteolytic, lipolytic, psychrotrophic and pseudomonas/aeromonas counts for all examined seafood samples were lie within the standard permissible limits. L. monocytogenes could not be detected from fresh or frozen fillets. Few freqyency of L. monocytogenes found in fresh and imported frozen shrimp. As well as V. parahaemolyticus and Y. enterocolitica were recovered from examined fresh and frozen seafood samples. The public health significance of the isolated organisms was also discussed. The quality of fresh fillets and shrimp were better than that of imported frozen one.

  19. Seafood Safety and Quality: The Consumer’s Role

    Directory of Open Access Journals (Sweden)

    Doris T. Hicks

    2016-10-01

    Full Text Available All the good news about seafood—the health and nutritional benefits, the wide varieties and flavors—has had a positive effect on consumption: people are eating more seafood (http://www.seagrant.sunysb.edu/seafood/pdfs/SeafoodSavvy.pdf. Yet consumers want to be assured that seafood is as safe as, or safer to eat than, other foods. When you hear “seafood safety”, think of a safety net designed to protect you, the consumer, from food-borne illness. Every facet of the seafood industry, from harvester to consumer, plays a role in holding up the safety net. The role of state and federal agencies, fishermen, aquaculturists, retailers, processors, restaurants, and scientists is to provide, update, and carry out the necessary handling, processing, and inspection procedures to give consumers the safest seafood possible. The consumer’s responsibility is to follow through with proper handling techniques, from purchase to preparation. It doesn’t matter how many regulations and inspection procedures are set up; the final edge of the safety net is held by the consumer. This article will give you the information you need to educate yourself and be assured that the fish and shellfish you consume are safe. The most common food-borne illnesses are caused by a combination of bacteria naturally present in our environment and food handling errors made in commercial settings, food service institutions, or at home.

  20. Occupational allergy due to seafood delivery: Case report

    Directory of Open Access Journals (Sweden)

    Trautmann Axel

    2008-05-01

    Full Text Available Abstract Background Sensitization to fish or crustaceans requires intensive skin contact and/or airway exposition and therefore especially workers in the seafood processing industry may develop an occupational seafood allergy. However, even in jobs with limited direct exposure, individuals with atopic disposition not using appropriate skin protection are at risk for developing occupational seafood allergy which requires termination of employment. Case presentation Due to increasing workload and pressure of time a truck driver in charge of seafood deliveries for 10 years neglected preventive measures such as wearing protective cloths and gloves which resulted in increasing direct skin contact to seafood or mucosal contact to splashing storage ice. Despite his sensitization to fish and crustaceans he tried to remain in his job but with ongoing incidental allergen exposure his symptoms progressed from initial contact urticaria to generalized urticaria, anaphylaxis and finally occupational asthma. Conclusion Faulty knowledge and increased work load may impede time-consuming usage of preventive measures for occupational health and safety. In predisposed atopic individuals even minor allergen exposure during seafood distribution may lead to occupational seafood allergy. With ongoing allergen exposure progression to potentially life-threatening allergy symptoms may occur.

  1. A survey of Danish consumers' purchase of seafood

    DEFF Research Database (Denmark)

    Grunert, Klaus G.; Bisp, Søren; Bredahl, Lone;

    for you. However, many perceive frozen fish as being less healthy than fresh fish. ­ Purchasing behaviour for seafood varies from segment to segment; not all segments are equally inclined to increase their consumption of seafood, and not all segments can be reached with the same marketing strategy...... and market communication should be adapted to one more of the six Danish consumer segments....... fish, consumers put the fishmonger and the fisherman at the harbour at the top, with 42% and 32% respectively. This can be interpreted as expressing consume desire to be as close to the landing time as possible. 3. Initiatives to increase Danish consumption of seafood should take account...

  2. Cadmium and lead in selected tissues of two commercially important fish species from the Adriatic Sea.

    Science.gov (United States)

    Gaspić, Z Kljaković; Zvonarić, T; Vrgoc, N; Odzak, N; Barić, A

    2002-12-01

    Baseline levels of cadmium and lead were determined in muscle tissue and liver of hake (Merluccius merluccius) and red mullet (Mullus barbatus), two commercially important fish species from the eastern Adriatic. Concentrations of trace metals in liver (Cd: 6-183 microg kg(-1) w. wt. ; Pb: 39-970 microg kg(-1) w. wt.) were within the range of recently published data for the Mediterranean. In the muscle tissue, cadmium concentrations (4.1-29 microg kg(-1) w. wt.) were among the lowest reported values for the Mediterranean, whereas lead levels (49-158 microg kg(-1) w. wt.) were within the range of values reported for various coastal areas of the Mediterranean. Presented data on cadmium and lead content in the studied fish species provide no proof of the general pollution of the Adriatic. Obtained data were tested in relation to fish length. Metal concentrations in liver decreased with the increase in fish size, whereas no significant correlation was found between trace metal levels in the muscle tissue and the length of both species. Relationships between metal concentrations and sex were also tested, but they gave no significant results. A comparison of contaminant concentrations in the edible tissue of hake and red mullet with the Croatian legislation shows that the consumption of their meat is not harmful for humans, not even for the most endangered population from the coastal region.

  3. Relationship between microbial communities and mercury species in the seawater of the Central Adriatic Sea

    Science.gov (United States)

    Zivkovic, Igor; Horvat, Milena; Kotnik, Joze; Fajon, Vesna; Solic, Mladen; Kanduc, Tjasa

    2016-04-01

    The structure of the microbial food web and its role in biogeochemical processes in marine ecosystems may vary noticeably and depend on environmental trophic status. Importance of picoplankton makes them an essential component for understanding the food web dynamics in marine systems. These small organisms dominate the photosynthetic biomass and primary production in oligotrophic waters like the Adriatic Sea. One of the hypotheses of research is that the factors that enable scavenging nutrients at low concentrations also promote accumulation of contaminants in the biomass of microorganisms. Biologically mediated reactions can transform mercury species and facilitate their entrance into the marine food web in which it bioaccumulates in the form of methylmercury (MeHg). In order to establish relationship between Hg and microbial species, we performed samplings in the Central Adriatic Sea. Samplings were conducted during oceanographic cruises aboard the research vessel Bios Dva from March 2014 to December 2015. Research was constrained to transect from the island of Vis to the Bay of Kastela. Non-filtered water samples were collected for determination of methylmercury (MeHg), total mercury (THg), dissolved gaseous mercury (DGM), and microbial species in Adriatic coastal and open waters. In the pristine environment of the island of Vis, THg concentrations are the lowest and range from 0.14-1.10 ng/L. Mercury contamination from chlor-alkali industrial waters in the Bay of Kastela is observed through the highest THg concentrations (up to 5.58 ng/L). DGM always shows higher values in more contaminated areas (31.8-351 pg/L) than in the pristine environment (22.1-245 pg/L). MeHg concentrations vary, but the highest values are usually found in the Bay of Kastela (up to 34.3 pg/L). Number of picoeukaryotes is the highest in the Bay of Kastela (0.44×106-31.8×106/L) which has been affected by industrial and civil effluents from the surrounding cities. The lowest number is

  4. Expanding the concept of sustainable seafood using Life Cycle Assessment

    DEFF Research Database (Denmark)

    Ziegler, Friederike; Hornborg, Sara; Green, Bridget S

    2016-01-01

    -scale environmental impacts. In parallel, Life Cycle Assessment (LCA) has emerged as a widely used and recommended framework to assess environmental impacts of products, including globalscale impacts. For over a decade, LCA has been applied to seafood supply chains, leading to new insights into the environmental......Fisheries management and sustainability assessment of fisheries more generally have recently expanded their scope from single-species stock assessment to ecosystem-based approaches, aiming to incorporate economic, social and local environmental impacts, while still excluding global...... impact of seafood products. We present insights from seafood LCA research with particular focus on evaluating fisheries management, which strongly influences the environmental impact of seafood products. Further, we suggest tangible ways in which LCA could be taken up in management. By identifying trade...

  5. 2009 Survey of Gulf of Mexico Dockside Seafood Dealers

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This survey employed a two page, self-administered mail survey structured to collect economic and financial information from dockside seafood dealers who operated...

  6. Fresh and Frozen Seafood: Selecting and Serving It Safely

    Science.gov (United States)

    ... seafood will be used within 2 days after purchase, store it in the refrigerator. Otherwise, wrap it ... feeds Follow FDA on Twitter Follow FDA on Facebook View FDA videos on YouTube View FDA photos ...

  7. 2009 Survey of Gulf of Mexico Dockside Seafood Processors

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This survey gathered and analyze economic data from seafood processors throughout the states in the Gulf region. The survey sought to collect financial variables...

  8. Structure and evolution of the global seafood trade network

    Science.gov (United States)

    Gephart, Jessica A.; Pace, Michael L.

    2015-12-01

    The food production system is increasingly global and seafood is among the most highly traded commodities. Global trade can improve food security by providing access to a greater variety of foods, increasing wealth, buffering against local supply shocks, and benefit the environment by increasing overall use efficiency for some resources. However, global trade can also expose countries to external supply shocks and degrade the environment by increasing resource demand and loosening feedbacks between consumers and the impacts of food production. As a result, changes in global food trade can have important implications for both food security and the environmental impacts of production. Measurements of globalization and the environmental impacts of food production require data on both total trade and the origin and destination of traded goods (the network structure). While the global trade network of agricultural and livestock products has previously been studied, seafood products have been excluded. This study describes the structure and evolution of the global seafood trade network, including metrics quantifying the globalization of seafood, shifts in bilateral trade flows, changes in centrality and comparisons of seafood to agricultural and industrial trade networks. From 1994 to 2012 the number of countries trading in the network remained relatively constant, while the number of trade partnerships increased by over 65%. Over this same period, the total quantity of seafood traded increased by 58% and the value increased 85% in real terms. These changes signify the increasing globalization of seafood products. Additionally, the trade patterns in the network indicate: increased influence of Thailand and China, strengthened intraregional trade, and increased exports from South America and Asia. In addition to characterizing these network changes, this study identifies data needs in order to connect seafood trade with environmental impacts and food security outcomes.

  9. Seafood Safety: Seriousness of Problems and Efforts to Protect Consumers.

    Science.gov (United States)

    1988-08-01

    acute or chronic illness in humans. Biological pathogens (including naturally occurring, water-borne and sewage- related bacteria and viruses) are...Seafood S GAtO 1 le% I Contents Executive Summary 2 Chapter 1 10 Introduction Recent Concerns About Seafood Safety 11 Objectives, Scope, and Methodology...con- cern for most of t his centuiiry. Illness out breaks and deathl froim typhoid fever bacteria in shellfish during the first qtuarter of’ this (ent

  10. Seasonal distribution of bromophenols in selected Hong Kong seafood.

    Science.gov (United States)

    Chung, Hau Yin; Joyce Ma, Wing Chi; Kim, Joo-Shin

    2003-11-01

    Selected seafood including rabbitfish (Siganus canaliculatus), brown-spotted grouper (Epinephelus areolatus), clam (Tapes philippinarum), oyster (Ostrea rivularis), shrimp (Penaeus japonicus), and crab (Charybdis feriatus), commonly found in the Hong Kong wet market, was monitored for their distribution and seasonal variations of their bromophenol contents. Specifically, 2-bromophenol (1). 4-bromophenol (2). 2,4-dibromophenol (3). 2,6-dibromophenol (4). and 2,4,6-tribromophenol (5). were monitored due to their flavor impact to seafood. All samples of marine origin contained bromophenols throughout a year. Crab had the highest concentration of total bromophenol content throughout the season. Concentrations of compounds 1, 4, and 5 in the local seafood were generally higher than that found in the literature values to provide characteristic flavor, but lower than that required to cause off-flavor. Variations of the flavor impact of bromophenols in seafood during a season could be better shown by their flavor values. Distribution and seasonal variations of bromophenol content in seafood coincided well with the seasonal growth cycle of the bromophenol synthesizing seaweeds, e.g. brown algae, in the region suggesting the abundant source of bromophenols in the environment might have a high impact on the quantity of bromophenols found in seafood.

  11. Hepatotoxic Seafood Poisoning (HSP Due to Microcystins: A Threat from the Ocean?

    Directory of Open Access Journals (Sweden)

    Evangelos Briasoulis

    2013-08-01

    Full Text Available Cyanobacterial blooms are a major and growing problem for freshwater ecosystems worldwide that increasingly concerns public health, with an average of 60% of blooms known to be toxic. The most studied cyanobacterial toxins belong to a family of cyclic heptapeptide hepatotoxins, called microcystins. The microcystins are stable hydrophilic cyclic heptapeptides with a potential to cause cell damage following cellular uptake via organic anion-transporting proteins (OATP. Their intracellular biologic effects presumably involve inhibition of catalytic subunits of protein phosphatases (PP1 and PP2A and glutathione depletion. The microcystins produced by cyanobacteria pose a serious problem to human health, if they contaminate drinking water or food. These toxins are collectively responsible for human fatalities, as well as continued and widespread poisoning of wild and domestic animals. Although intoxications of aquatic organisms by microcystins have been widely documented for freshwater ecosystems, such poisonings in marine environments have only occasionally been reported. Moreover, these poisonings have been attributed to freshwater cyanobacterial species invading seas of lower salinity (e.g., the Baltic or to the discharge of freshwater microcystins into the ocean. However, recent data suggest that microcystins are also being produced in the oceans by a number of cosmopolitan marine species, so that Hepatotoxic Seafood Poisoning (HSP is increasingly recognized as a major health risk that follows consumption of contaminated seafood.

  12. Use of modified atmosphere in seafood preservation

    Directory of Open Access Journals (Sweden)

    Marcilene C. Heidmann Soccol

    2003-12-01

    Full Text Available Fish production has increased in Brazil, mainly the fresh-water aquaculture. However, refrigerated fish presents a relatively short shelf-life (approximately 12 days. In view of the increasing demand for fresh products, there is the need of shelf-life lengthening through a combination of methods in order to minimally expose the product to adverse conditions. The use of the modified atmosphere packaging presents the following advantages: lengthening of the products' shelf-life by 50 to 400%, reduction of economic losses, cost reductions by distributing the product over great distances with the need of fewer shipments and the supply of a better quality product. The purpose of this work was to review and discuss the major effects of the modified-atmosphere packaging, especially carbon dioxide (CO2, on seafood preservation, as well as on the survival and growth of seafood pathogenic organisms.A produção de pescado vem crescendo no Brasil, principalmente a piscicultura de água doce, porém o pescado refrigerado tem uma vida útil relativamente pequena, cerca de 12 dias, e a demanda de produtos frescos é crescente, havendo, portanto, a necessidade de aumentar a vida útil destes, através da utilização de processos combinados, que exponham o mínimo possível o produto a condições adversas. O uso de embalagens com atmosfera modificada têm como vantagens potenciais: aumento da vida útil de 50 a 400%; redução de perdas econômicas; distribuição dos produtos a longas distâncias e com poucas remessas, diminuindo os custos; além do fornecimento de produtos de qualidade. Esta revisão teve como objetivo discutir os efeitos da atmosfera modificada na conservação do pescado, principalmente CO2, sobre o crescimento e sobrevivência de patógenos de origem alimentar.

  13. Toxin Levels and Profiles in Microalgae from the North-Western Adriatic Sea—15 Years of Studies on Cultured Species

    Directory of Open Access Journals (Sweden)

    Elena Riccardi

    2012-01-01

    Full Text Available The Northern Adriatic Sea is the area of the Mediterranean Sea where eutrophication and episodes related to harmful algae have occurred most frequently since the 1970s. In this area, which is highly exploited for mollusk farming, the first occurrence of human intoxication due to shellfish consumption occurred in 1989, nearly 10 years later than other countries in Europe and worldwide that had faced similar problems. Until 1997, Adriatic mollusks had been found to be contaminated mostly by diarrhetic shellfish poisoning toxins (i.e., okadaic acid and dinophysistoxins that, along with paralytic shellfish poisoning toxins (i.e., saxitoxins, constitute the most common marine biotoxins. Only once, in 1994, a toxic outbreak was related to the occurrence of paralytic shellfish poisoning toxins in the Adriatic coastal waters. Moreover, in the past 15 years, the Adriatic Sea has been characterized by the presence of toxic or potentially toxic algae, not highly widespread outside Europe, such as species producing yessotoxins (i.e., Protoceratium reticulatum, Gonyaulax spinifera and Lingulodinium polyedrum, recurrent blooms of the potentially ichthyotoxic species Fibrocapsa japonica and, recently, by blooms of palytoxin-like producing species of the Ostreopsis genus. This review is aimed at integrating monitoring data on toxin spectra and levels in mussels farmed along the coast of the Emilia-Romagna region with laboratory studies performed on the species involved in the production of those toxins; toxicity studies on toxic or potentially toxic species that have recently appeared in this area are also reviewed. Overall, reviewed data are related to: (i the yessotoxins producing species P. reticulatum, G. spinifera and L. polyedrum, highlighting genetic and toxic characteristics; (ii Adriatic strains of Alexandrium minutum, Alexandrium ostenfeldii and Prorocentrum lima whose toxic profiles are compared with those of strains of different geographic origins

  14. A long and winding road: Skeletonema sp transport by Northern Adriatic Dense Waters to the Southern Adriatic Pit.

    Science.gov (United States)

    Marcello Falcieri, Francesco; Bernardy Aubry, Fabrizio; Barbariol, Francesco; Benetazzo, Alvise; Bergamasco, Andrea; Boldrin, Alfredo; Bonaldo, Davide; Carniel, Sandro; Finotto, Stefania; Sclavo, Mauro

    2015-04-01

    The semi enclosed Adriatic Sea is a sub basin of the Mediterranean Sea located in its northeastern part; it has a shallow northern part (average depth of 40 m) and a deep Southern Adriatic Pit (SAP) that reaches 1200m. The presence of a wide continental shelf exposed to strong heat and momentum fluxes during winter months makes the Northern Adriatic a formation site of dense waters, generally referred to as Northern Adriatic Dense Water (NAdDW). Once produced, it moves south as a quasi-geostrophically adjusted vein , flowing along the Italian coast and enters the SAP giving origin to descent and cascading dense shelf water bringing into the deep layers oxygen, nutrients and organic compound. In February 2012 a long and intense cold air outbreak, with strong Bora winds, interested the northern part of the Adriatic sea causing a drop in water temperature to less than 6 °C and an increase in density to values as high as 1030.2 kg/m3 (likely the maximum values since 1929). This resulted in a massive production of NAdDW. In order to study the behavior of the NAdDW vein, a rapid response 2 legs cruise (ODW2012) was organized in the southern Adriatic. During the cruise, along with physical and chemical measurements, water and phytoplankton samples were collected at different depths. Usual abundance and distribution with a general decrease in phytoplankton abundance from the surface to the bottom were found in all stations with one exception. The bottom sample of a station located roughly 40 km at 120 m depth in front of Gargano showed a significantly high dominance (40%) of the small diatom Skeletonema sp whose flowering is typical in the surface waters of the northern Adriatic in late winter. The physical parameters of the water column showed signs of the passage of the dense water vein (lower temperature and higher dissolved oxygen concentrations) hence it was hypothesized that those diatoms were actively transported by the NAdDW near-bottom stream. A further

  15. The distribution of bats on the Adriatic islands

    NARCIS (Netherlands)

    Dulić, Beatrica; Tvrtković, Nikola

    1970-01-01

    The bat fauna of the Adriatic islands is very poorly known in comparison with that of the coastal continental regions (Kolombatović, 1882, 1884; Dulić, 1959). Although ten species of bats are recorded, the data for most of the islands except the island of Lastovo (Dulić, 1968) are scarce, and of an

  16. Assessing larval connectivity for marine spatial planning in the Adriatic.

    Science.gov (United States)

    Bray, L; Kassis, D; Hall-Spencer, J M

    2017-04-01

    There are plans to start building offshore marine renewable energy devices throughout the Mediterranean and the Adriatic has been identified as a key location for wind farm developments. The development of offshore wind farms in the area would provide hard substrata for the settlement of sessile benthos. Since the seafloor of the Adriatic is predominantly sedimentary this may alter the larval connectivity of benthic populations in the region. Here, we simulated the release of larvae from benthic populations along the coasts of the Adriatic Sea using coupled bio-physical models and investigated the effect of pelagic larval duration on dispersal. Our model simulations show that currents typically carry particles from east to west across the Adriatic, whereas particles released along western coasts tend to remain there with the Puglia coast of Italy acting as a sink for larvae from benthic populations. We identify areas of high connectivity, as well as areas that are much more isolated, and discuss how these results can be used to inform marine spatial planning and the licensing of offshore marine renewable energy developments.

  17. Polychlorinated biphenyls, organochlorine pesticides and trace metals in cultured and harvested bivalves from the eastern Adriatic coast (Croatia).

    Science.gov (United States)

    Milun, Vesna; Lušić, Jelena; Despalatović, Marija

    2016-06-01

    Polychlorinated biphenyls, organochlorine pesticides and trace metals were determined in tissues of bivalve molluscs (Mytilus galloprovincialis, Ostrea edulis, Venus verrucosa, Arca noae and Callista chione), collected from 11 harvesting and 2 cultured locations along the eastern Adriatic coast, in May and November 2012. Concentrations (ng g(-1) dry weight) of organochlorines ranged from 1.53 to 21.1 for PCBs and 0.68 to 5.21 for p,p'-DDTs. HCB, lindane, heptachlor and aldrin-like compounds were found in lower levels or were not detected. Metal concentrations (mg kg(-1) dry weight) ranged from 0.23 to 4.03 for Cd, 0.87-3.43 for Cr, 3.69-202.3 for Cu, 0.06-0.26 for HgT, 0.62-9.42 for Ni, 0.95-4.64 for Pb, and 55.76-4010.3 for Zn. Established organochlorine and trace metal levels were lower than the maximum allowable levels in seafood set by the European Commission.

  18. ASSESSMENT OF RASFF NOTIFICATIONS CONCERNING SEAFOOD DURING THE YEAR 2008

    Directory of Open Access Journals (Sweden)

    A. M. Semeraro

    2013-02-01

    Full Text Available The RASFF provides a useful database on food and hazard types and countries of origin. We focused on all of the weekly overviews during the year 2008 containing tables with data of seafood alert and information notifications and border rejections. Data have been parsed into an Excel spreadsheet file and stored into the following column headings: seafood, food preservation, reason for notifying or rejection, country of origin, reference number. Relationships between product and hazard categories, way of storing, country of origin have been assessed. The results have been shown by means of graphs. The aim of this paper is making a database with specific informations on seafood and correlated hazards and country of origin available for both studying historical trends and predicting future risks.

  19. Design Activities in the NorwegianSeafood Industry: A theoretical approach to understanding cooperation and communication

    OpenAIRE

    Schulte, Kjersti Øverbø

    2009-01-01

    The thesis discusses design activities in the Norwegian seafood processing industry, with focus on cooperation between packaging suppliers and designers. There is a twofold objective: to increase understanding of how industrial design methodology can be utilised in the seafood industry, and to introduce a theoretical foundation for cooperation and communication in industrial design methodology.Sales of fish and seafood represent Norway’s third largest export. Seafood is an industrially proces...

  20. [Fish and seafood as a source of human exposure to methylmercury].

    Science.gov (United States)

    Mania, Monika; Wojciechowska-Mazurek, Maria; Starska, Krystyna; Rebeniak, Małgorzata; Postupolski, Jacek

    2012-01-01

    Fish and seafood are recommended diet constituents providing high quality protein, vitamins, minerals and omega-3 fatty acids, mainly eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). However, these foodstuffs can also be the major source ofmethylmercury intake in humans. In general, more than 90% of the mercury in fish is found as methylmercury, but contents of methylmercury can vary considerably between species. Predatory species that are at the top of the food chain and live a long time, may accumulate higher levels of methylmercury. This paper contains information about sources of human exposure to organic compounds of mercury, toxicity, metabolism and transformation of mercury in the environment. Assessment of methylmercury by international risk assessment bodies such as the Joint FAO/WHO Expert Committee on Food Additives (JECFA) and U.S. National Research Council (NRC) were presented. Climate changes and their influence on the mercury cycle in the environment especially mercury methylation and concentrations of methylmercury in marine species were also presented. Consumer advice prepared by European Commission and Member States as regards consumption of predatory fishes such as swordfish, tuna, shark, marlin and pike, taking into account the most vulnerable groups of population e.g. women planning pregnancy, pregnant or breastfeeding women and children were presented. Mercury and methylmercury contamination of fishes and seafood on the basis of the literature references as well as intake of mercury with fish and fish products in Poland and other European country were discussed. The role of selenium as a factor which counteracts methylmercury toxicity and protects against some neurological effects of methylmercury exposure in humans, as well as information on potential etiological factors connected with autism disorder were also described. Attention has also been drawn to increasing number of notifications to Rapid Alert System for Food and Feed

  1. Seafood inclusion in commercial main meal early years' food products.

    Science.gov (United States)

    Carstairs, Sharon A; Marais, Debbi; Craig, Leone C A; Kiezebrink, Kirsty

    2016-10-01

    Seafood consumption is recommended as part of a healthy, balanced diet. Under-exposure to seafood during early years feeding, when taste and food acceptance is developed, may impact on the future development of a varied diet. This study aimed to investigate the availability and nutritional content of seafood in commercial infant meals compared to the other food types. A survey was conducted of all commercial infant main meal products available for purchase in supermarkets, high street retailers and online stores within the United Kingdom. The primary food type (seafood, poultry, meat and vegetables) within each product, nutritional composition per 100 g, and ingredient contribution were assessed. Of the original 341 main meal products seafood (n = 13; 3.8%) was underrepresented compared to poultry (103; 30.2%), meat (121; 35.5%) and vegetables (104; 30.5%). The number of the seafood meals increased three years later (n = 20; 6.3%) vegetable meals remained the largest contributor to the market (115; 36.4%) with meat (99; 31.3%) and poultry (82; 26.0%) both contributing slightly less than previously. Seafood-based meals provided significantly higher energy (83.0 kcal), protein (4.6 g), and total fat (3.2 g) than vegetable (68 kcal, 2.7 g, 1.9 g), meat (66 kcal, 3.0 g, 2.1 g) and poultry-based meals (66 kcal, 3.0 g, 2.1 g) and higher saturated fat (1.3 g) than poultry (0.4 g) and vegetable-based (0.6 g) meals (all per 100 g) which may be attributed to additional dairy ingredients. Parents who predominantly use commercial products to wean their infant may face challenges in sourcing a range of seafood products to enable the introduction of this food into the diet of their infant.

  2. Concurrent engineering and product models in seafood companies

    DEFF Research Database (Denmark)

    Jonsdottir, Stella; Vesterager, Johan; Børresen, Torger

    1998-01-01

    Concurrent Engineering (CE) can provide an improved approach to product development for extending the lines of seafood products. Information technology (IT) support tools based on product models can provide an integrated and simultaneous approach for specifying new recipes. The seafood industry can...... benefit from the CE approach which can support product developers to provide concurrent specifications for raw materials, ingredients, packaging, and production methods. The approach involves the use of product models from which line extensions are more easily generated than by use of customary stepwise...

  3. Longitudinal surface plasmon resonance assay enhanced by magnetosomes for simultaneous detection of Pefloxacin and Microcystin-LR in seafoods.

    Science.gov (United States)

    Sun, Xiulan; Wu, Longyun; Ji, Jian; Jiang, Donglei; Zhang, Yinzhi; Li, Zaijun; Zhang, Genyi; Zhang, Hongxia

    2013-09-15

    A simple longitudinal surface plasmon resonance (LSPR) assay for the simultaneous detection of Pefloxacin and Microcystin-LR in seafoods has been developed for the first time using antibody-functionalized gold nanorods as signal probes and antigen-ovalbumin modified biological magnetosomes as signal amplification probes. The gold nanorods exhibit two different LSPR peaks, at around 695nm and 863nm, the positions of which were sensitive to changes in the local environment but can be subjected to simultaneous UV-vis detection. The biological magnetosomes produced by the magnetotactic bacteria not only act as a substrate for the immobilization of artificial antigen, but also enable signal enhancement and rapid separation, because of good dispersivity, biocompatibility and superparamagnetic properties. Under optimal conditions, magnetosome-enhanced LSPR assays showed a good linear response over the range 1-20ngmL(-1) (R(2)=0.9978 and R(2)=0.9992) with little adsorption to Enrofloxacin, Sarafloxacin, Ciprofloxacin, Norfloxacin, Microcystin-RR, Microcystin-LW, and Microcystin-LF, and compared with magnetosome-free LSPR assays, the response signal was amplified 2.5-5.0 fold. Furthermore, LSPR assays were successful in the analysis of Pefloxacin and Microcystin-LR in naturally contaminated seafood samples and high recoveries were achieved. Indications are that this LSPR assay promises reliable simultaneous detection of Pefloxacin and Microcystin-LR in seafoods, and holds the potential of novel applications in exploiting this multiple simultaneous UV-vis detection.

  4. 78 FR 20092 - Proposed Information Collection; Comment Request; Fish and Seafood Promotion

    Science.gov (United States)

    2013-04-03

    ... Seafood Promotion AGENCY: National Oceanic and Atmospheric Administration (NOAA), Commerce. ACTION: Notice... collection. Under the authority of the Fish and Seafood Promotion Act of 1986, information collected under... organization applying for consideration to form a seafood promotion council, and (2) the information...

  5. Origin and ecological selection of core and food-specific bacterial communities associated with meat and seafood spoilage.

    Science.gov (United States)

    Chaillou, Stéphane; Chaulot-Talmon, Aurélie; Caekebeke, Hélène; Cardinal, Mireille; Christieans, Souad; Denis, Catherine; Desmonts, Marie Hélène; Dousset, Xavier; Feurer, Carole; Hamon, Erwann; Joffraud, Jean-Jacques; La Carbona, Stéphanie; Leroi, Françoise; Leroy, Sabine; Lorre, Sylvie; Macé, Sabrina; Pilet, Marie-France; Prévost, Hervé; Rivollier, Marina; Roux, Dephine; Talon, Régine; Zagorec, Monique; Champomier-Vergès, Marie-Christine

    2015-05-01

    The microbial spoilage of meat and seafood products with short shelf lives is responsible for a significant amount of food waste. Food spoilage is a very heterogeneous process, involving the growth of various, poorly characterized bacterial communities. In this study, we conducted 16S ribosomal RNA gene pyrosequencing on 160 samples of fresh and spoiled foods to comparatively explore the bacterial communities associated with four meat products and four seafood products that are among the most consumed food items in Europe. We show that fresh products are contaminated in part by a microbiota similar to that found on the skin and in the gut of animals. However, this animal-derived microbiota was less prevalent and less abundant than a core microbiota, psychrotrophic in nature, mainly originated from the environment (water reservoirs). We clearly show that this core community found on meat and seafood products is the main reservoir of spoilage bacteria. We also show that storage conditions exert strong selective pressure on the initial microbiota: alpha diversity in fresh samples was 189±58 operational taxonomic units (OTUs) but dropped to 27±12 OTUs in spoiled samples. The OTU assemblage associated with spoilage was shaped by low storage temperatures, packaging and the nutritional value of the food matrix itself. These factors presumably act in tandem without any hierarchical pattern. Most notably, we were also able to identify putative new clades of dominant, previously undescribed bacteria occurring on spoiled seafood, a finding that emphasizes the importance of using culture-independent methods when studying food microbiota.

  6. Sea surface microplastics in Slovenian part of the Northern Adriatic.

    Science.gov (United States)

    Gajšt, Tamara; Bizjak, Tine; Palatinus, Andreja; Liubartseva, Svitlana; Kržan, Andrej

    2016-12-15

    Plastics are the most common material of marine litter and have become a global pollution concern. They are persistent in the environment where they gradually degrade into increasingly smaller particles-microplastics (MP). Our study presents results of sea-surface monitoring for MP in the Slovenian part of the Trieste Bay in the Northern Adriatic Sea. In 17 trawls conducted over a 20-month period we found a high average concentration of 406×10(3)MPparticles/km(2). Over 80% of the particles were identified as polyethylene. The significant variability of MP concentrations obtained on different sampling dates is explained by use of surface current maps and a recently developed Markov chain marine litter distribution model for the Adriatic Sea.

  7. Wastewater Pollution from Cruise Ships in the Adriatic Sea

    Directory of Open Access Journals (Sweden)

    Tina Perić

    2016-08-01

    Full Text Available The global growth of cruise tourism has brought increasing concern for the pollution of the marine environment. Marine pollution from sanitary wastewater is a problem especially pronounced on large cruise ships where the number of people on board may exceed 8,000. To evaluate future marine pollution in any selected period of time it is necessary to know the movement of ships in the Adriatic Sea. This paper presents the problem of marine pollution by sanitary wastewater from cruise ships, wastewater treatment technology and a model of cruise ship traffic in the Adriatic Sea considering MARPOL Annex IV areas of limited wastewater discharge. Using the model, it is possible to know in advance the routes of the cruisers and retention time in certain geographic areas. The data obtained by this model can be used as input parameters for evaluation model of wastewater pollution or for evaluation of other types of pollution from cruise ships.

  8. Molecular Detection of the Three Major Pathogenic Vibrio Species from Seafood Products and Sediments in Tunisia Using Real-Time PCR.

    Science.gov (United States)

    Gdoura, Morsi; Sellami, Hanen; Nasfi, Hanen; Trabelsi, Rahma; Mansour, Sabeur; Attia, Touraya; Nsaibia, Siwar; Vallaeys, Tatiana; Gdoura, Radhouane; Siala, Mariam

    2016-12-01

    Vibrio spp. have emerged as a serious threat to human health worldwide. V. parahaemolyticus , V. cholerae , and V. vulnificus pose a considerable public health risk in Tunisia because they cause sporadic and epidemic foodborne infections associated with the consumption of raw or undercooked contaminated seafood. More recently, toxR-positive V. alginolyticus was also reported to be a potential source of contaminated seafood. A total of 247 samples, including 113 fishes ( Labrus viridis , Penaeus kerathurus , Diplodus annularis , Diplodus sparaillon , Scorparna porcus , Sarpa salpa , Dentex dentex , Scorparna scrofa , Sardinella aurita , Trachurus trachurus , Synodus saurus , Pagellus erythrinus , and Metapenaeus monoceros ), 83 clams ( Ruditapes decussatus species), 30 seawater samples, and 21 sediment samples were analyzed using traditional culture methods (ISO/TS 21872-1; International Organization for Standardization 2007) and a conventional PCR method for Vibrio spp.

  9. Improved Ant Colony Optimization for Seafood Product Delivery Routing Problem

    Directory of Open Access Journals (Sweden)

    Baozhen Yao

    2014-02-01

    Full Text Available This paper deals with a real-life vehicle delivery routing problem, which is a seafood product delivery routing problem. Considering the features of the seafood product delivery routing problem, this paper formulated this problem as a multi-depot open vehicle routing problem. Since the multi-depot open vehicle routing problem is a very complex problem, a method is used to reduce the complexity of the problem by changing the multi-depot open vehicle routing problem into an open vehicle routing problem with a dummy central depot in this paper. Then, ant colony optimization is used to solve the problem. To improve the performance of the algorithm, crossover operation and some adaptive strategies are used. Finally, the computational results for the benchmark problems of the multi-depot vehicle routing problem indicate that the proposed ant colony optimization is an effective method to solve the multi-depot vehicle routing problem. Furthermore, the computation results of the seafood product delivery problem from Dalian, China also suggest that the proposed ant colony optimization is feasible to solve the seafood product delivery routing problem.

  10. Human exposure to organic arsenic species from seafood.

    Science.gov (United States)

    Taylor, Vivien; Goodale, Britton; Raab, Andrea; Schwerdtle, Tanja; Reimer, Ken; Conklin, Sean; Karagas, Margaret R; Francesconi, Kevin A

    2017-02-15

    Seafood, including finfish, shellfish, and seaweed, is the largest contributor to arsenic (As) exposure in many human populations. In contrast to the predominance of inorganic As in water and many terrestrial foods, As in marine-derived foods is present primarily in the form of organic compounds. To date, human exposure and toxicological assessments have focused on inorganic As, while organic As has generally been considered to be non-toxic. However, the high concentrations of organic As in seafood, as well as the often complex As speciation, can lead to complications in assessing As exposure from diet. In this report, we evaluate the presence and distribution of organic As species in seafood, and combined with consumption data, address the current capabilities and needs for determining human exposure to these compounds. The analytical approaches and shortcomings for assessing these compounds are reviewed, with a focus on the best practices for characterization and quantitation. Metabolic pathways and toxicology of two important classes of organic arsenicals, arsenolipids and arsenosugars, are examined, as well as individual variability in absorption of these compounds. Although determining health outcomes or assessing a need for regulatory policies for organic As exposure is premature, the extensive consumption of seafood globally, along with the preliminary toxicological profiles of these compounds and their confounding effect on assessing exposure to inorganic As, suggests further investigations and process-level studies on organic As are needed to fill the current gaps in knowledge.

  11. Consumer purchasing behavior towards fish and seafood products

    NARCIS (Netherlands)

    Carlucci, D.; Nocella, G.; Devitiis, De B.; Bimbo, F.; Nardone, G.

    2015-01-01

    The present systematic review was performed to assess consumer purchasing behaviour towards fish and seafood products in the wide context of developed countries. Web of Science, Scopus, ScienceDirect and Google Scholar engines were used to search the existing literature and a total of 49 studies wer

  12. Theoretical Aspects of Brand Building in Seafood Industry

    OpenAIRE

    Križanová, Anna; Majerová, Jana; Klieštik, Tomáš; Majerčák, Peter

    2013-01-01

    The aim of this paper is to describe theoretical aspects of brand building in seafood industry, because of its perpectives and the lack of brand building practice in this field. According to this, basics elements of brands are described and brand building and tools of brand concept development are analyzed.

  13. NUTRITIVE VALUE OF TROUT (ONCORHYNCHUS MYKISS FARMED IN ADRIATIC SEA

    Directory of Open Access Journals (Sweden)

    Tibor Janči

    2013-01-01

    Full Text Available The aim of this study was to determine the chemical composition of fresh and cold smoked rainbow trout fillets (Oncorhynchus mykiss farmed in the Adriatic sea by measuring water, fat, protein, salt and ash content, fatty acid profile with an emphasis on eicosapentaenoic (EPA and docosahexaenoic (DHA fatty acids. Physical characteristics were determined by pH and color measurements. Analysis was performed on homogenized fish muscles without skin and bones. Determination of moisture, ash, fat and protein was conducted according to AOAC (1995. Determination of fatty acid content of previously prepared methyl esters (HRN EN ISO 5509, 2004 was conducted by gas chromatography according to HRN EN ISO 5508 (1999. Results showed that fresh rainbow trout farmed in the Adriatic sea is an excellent protein source (21.21% but has slightly lower fat (5.21% and omega-3 fatty acid content (12.52 % compared to the results of other studies. Fat and omega-3 fatty acid content was not decreased by the process of cold smoking. Overall, fresh and smoked trout farmed in the Adriatic may be regarded as food high in nutritional value.

  14. Seafood Banquets in Beijing: Consumer Perspectives and Implications for Environmental Sustainability

    Directory of Open Access Journals (Sweden)

    Michael Fabinyi

    2014-01-01

    Full Text Available Understanding the social drivers of increased seafood consumption in China, such as consumer perspectives in banquets, will be crucial if practical strategies to introduce sustainability into this market are to be successfully implemented. Based on 34 semi-structured interviews with key informants including seafood restaurant operators, seafood consumers and seafood traders, this study investigated seafood consumer attitudes and behaviours in Beijing seafood restaurants. The results and discussion is divided into sections that address the popularity and reasons behind the popularity of: 1 seafood banquets in general; 2 fish at banquets; 3 other forms of seafood at banquets; and 4 preferred characteristics and qualities of seafood at banquets. The consumption of certain types of seafood such as live reef fish and sea cucumber is becoming increasingly popular, while the consumption of shark fin is decreasing in popularity. Awareness and concern about sustainability and traceability issues were relatively low, and more significant themes for understanding consumer preferences about seafood include social status and prestige, food safety and quality, and health and nutrition. The paper concludes by demonstrating the implications for market-based interventions and government regulation.

  15. Impact of winter oceanographic conditions on zooplankton abundance in northern Adriatic with implications on Adriatic anchovy stock prognosis

    Science.gov (United States)

    Kraus, Romina; Supić, Nastjenjka; Lučić, Davor; Njire, Jakica

    2015-12-01

    Anchovy, Engraulis encrasicolus (L.), is commercially one of the most important Adriatic small pelagic fish. Despite the prevailing oligotrophication trend in the northern Adriatic (NA), the anchovy catch increased after 2000, coinciding with an increased number of the winter type A occurrences, when Po River waters are favoured to spread across the NA. Namely, winter type A is characterised by conditions resulting with Po River waters spreading across the NA along with salinity decrease. On the contrary, in winters of type B, salinity is high. We hypothesized in previous paper, based on correlation between circulation patterns and phytoplankton with anchovy catch, that excess feeding of anchovy in this winter pre-spawning period (February) can lead to increased amounts of the anchovy eggs two months later and subsequently to the total fish catch of the same year. In this paper, we investigate in more details and based on longer time series the relation between anchovy catch and winter circulation patterns of the NA. Additionally, we studied the association between anchovy catch and zooplankton, as anchovy is predominantly zooplanktivorous. We found that zooplankton abundances in winters of A type enhance and that ciliates play an important role in the NA anchovy food web and enrichment of the region with anchovy. Finally, the results of our investigation might in time represent the basics for a sustainable anchovy management in the Adriatic Sea as they enable the development of prediction models of the anchovy stock.

  16. Enzymes from Seafood Processing Waste and Their Applications in Seafood Processing.

    Science.gov (United States)

    Venugopal, V

    Commercial fishery processing results in discards up to 50% of the raw material, consisting of scales, shells, frames, backbones, viscera, head, liver, skin, belly flaps, dark muscle, roe, etc. Besides, fishing operations targeted at popular fish and shellfish species also result in landing of sizeable quantity of by-catch, which are not of commercial value because of their poor consumer appeal. Sensitivity to rapid putrefaction of fishery waste has serious adverse impact on the environment, which needs remedial measures. Secondary processing of the wastes has potential to generate a number of valuable by-products such as proteins, enzymes, carotenoids, fat, and minerals, besides addressing environmental hazards. Fishery wastes constitute good sources of enzymes such as proteases, lipases, chitinase, alkaline phosphatase, transglutaminase, hyaluronidase, acetyl glycosaminidase, among others. These enzymes can have diverse applications in the seafood industry, which encompass isolation and modification of proteins and marine oils, production of bioactive peptides, acceleration of traditional fermentation, peeling and deveining of shellfish, scaling of finfish, removal of membranes from fish roe, extraction of flavors, shelf life extension, texture modification, removal of off-odors, and for quality control either directly or as components of biosensors. Enzymes from fish and shellfish from cold habitats are particularly useful since they can function comparatively at lower temperatures thereby saving energy and protecting the food products. Potentials of these applications are briefly discussed.

  17. Detection of cholera toxin in seafood using a ganglioside-liposome immunoassay.

    Science.gov (United States)

    Ahn, Soohyoun; Durst, Richard A

    2008-05-01

    Microbiological contamination of foods continues to be a major concern in public health. Biological toxins are one class of important contaminants that can cause various human diseases. Outbreaks related to contamination by biological toxins or toxin-producing microorganisms have made it extremely important to develop rapid (approximately 20 min), sensitive and cost-effective analytical methods. This paper describes the development of a sensitive bioassay for the detection of cholera toxin (CT) in selected seafood samples, using ganglioside-incorporated liposomes. In this study, the assays were run with food samples spiked with various concentrations of CT. The limit of detection (LOD) increased by a factor of about 10-20 in most food samples, compared with the LOD in the buffer system previously reported. However, the LOD of toxins in food samples (8 × 10-3 × 10(3) fg/mL for CT) was still comparable to, or lower than, that previously reported for other assays. The results from this study demonstrate that the bioassays using ganglioside-liposomes can detect the toxin directly in the field screening of food samples rapidly, simply and reliably, without the need for complex instrumentation.

  18. Qualified temperature, salinity and dissolved oxygen climatologies in a changing Adriatic Sea

    Directory of Open Access Journals (Sweden)

    M. Lipizer

    2014-02-01

    Full Text Available An updated climatology, based on a comprehensive dataset (1911–2009 of temperature, salinity and dissolved oxygen, has been produced for the whole Adriatic Sea with the Variational Inverse Method using the DIVA software. Climatological maps were produced at 26 levels and validated with Ordinary Cross Validation and with real vs. synthetic Temperature–Salinity diagram intercomparison. The concept of Climatology–Observation Misfit (COM has been introduced as an estimate of the physical variability associated with the climatological structures. In order to verify the temporal stability of the climatology, long-term variability has been investigated in the Mid Adriatic and the South Adriatic Pits, regarded as the most suitable records of possible long-term changes. Compared with previous climatologies, this study reveals a surface temperature rise (up to 2 °C, a clear deep dissolved oxygen minimum in the South Adriatic Gyre and a bottom summer oxygen minimum in the North Adriatic. Below 100 m all properties profoundly differ between the Middle and the South Adriatic. The South Adriatic Pit clearly shows the remote effects of the Eastern Mediterranean Transient, while no effect is observed in Middle Adriatic Pits. The deepest part of the South Adriatic seems now to be significantly saltier (+0.18 since the period 1911–1914, with an increase of +0.018 decade−1 since the late 1940s and warmer (+0.54 °C since 1911–1914, even though a long-term temperature trend could not be statistically demonstrated. Conversely, the Middle Adriatic Pits present a long-term increase in apparent oxygen utilisation (+0.77 mL L−1 since 1911–1914, with a constant increase of +0.2 mL L−1 decade−1 after the 1970s.

  19. Are retailers' preferences for seafood attributes predictive for consumers wants?

    DEFF Research Database (Denmark)

    Fernández-Polancoa, José; Mueller Loose, Simone; Luna, Ladislao

    2013-01-01

    choice and to test for differences in attribute preferences between retailers and consumers. Results indicate that both consumers and retailers agree in their marginal willingness to pay for wild over farmed seabream. However, they differ in the extent to which the disutility from farmed production can......Aquaculture production has grown considerably in the southern countries of Europe during the last two decades. This increase in supply has not been matched by an equivalent rise in consumer demand, resulting in price decay. For farmed seabream (Sparus aurata) this paper examines which attributes...... and claims are able to successfully influence Spanish consumers’ perceived value of seafood and to which degree consumers and retailers in a traditional fish market differ in their choice reaction to these attributes. A heteroscedastic logit model was used to assess the impact of seafood claims on consumer...

  20. Polychlorinated biphenyls (PCBs), polybrominated diphenyl ethers (PBDEs) and perfluorinated alkylated substances (PFASs) in traditional seafood items from western Greenland.

    Science.gov (United States)

    Carlsson, Pernilla; Herzke, Dorte; Kallenborn, Roland

    2014-03-01

    In this study, contamination levels were determined for polychlorinated biphenyls (PCBs), polybrominated diphenyl ethers (PBDEs) and perfluorinated alkylated substances (PFASs) in traditional Greenland seafood items, such as raw and smoked fish fillet (salmon and halibut), whale and seal meat and narwhal mattak (skin and blubber). The daily intake of PCBs, PBDEs and PFASs through traditional seafood items in Greenland was assessed. Based on the presented levels of contaminants, in combination with earlier food intake studies, suggests that the daily exposure was below the tolerable daily intake threshold for all compounds. BDE-47 was the only PBDE-congener detected in all food items, except in smoked halibut. The levels of BDE-47 varied from < LOD in smoked halibut up to 18 ng/g lw in narwhal mattak and 21 ng/g lw in whale beef. ∑PCB were lowest in smoked halibut (37 ng/g lw) and highest in narwhal mattak with 1,146 ng/g lw. Perfluorooctane sulfonate (PFOS) was the most common of the PFASs. However, ΣPFASs were below detection limits in most fish fillet samples, and varied from 2.9 ng/g ww in whale beef to 13.5 ng/g ww in seal beef. The present study shows that the exclusion from the diet of local food items such as intestines and blubber have a strong positive effect for the reduction of POPs levels in food, without a reducing the health benefits of traditional food intake considerably.

  1. Wave climate of the Adriatic Sea: a future scenario simulation

    Directory of Open Access Journals (Sweden)

    A. Benetazzo

    2012-06-01

    Full Text Available We present a study on expected wind wave severity changes in the Adriatic Sea for the period 2070–2099 and their impact on extremes. To do so, the phase-averaged spectral wave model SWAN is forced using wind fields computed by the high-resolution regional climate model COSMO-CLM, the climate version of the COSMO meteorological model downscaled from a global climate model running under the IPCC-A1B emission scenario. Namely, the adopted wind fields are given with a horizontal resolution of 14 km and 40 vertical levels, and they are prepared by the Italian Aerospace Research Centre (CIRA. Firstly, in order to infer the wave model accuracy in predicting seasonal variability and extreme events, SWAN results are validated against a control simulation, which covers the period 1965–1994. In particular, numerical predictions of the significant wave height Hs are compared against available in-situ data. Further, a statistical analysis is carried out to estimate changes on wave storms and extremes during the simulated periods (control and future scenario simulations. In particular, the generalized Pareto distribution is used to predict changes of storm peak Hs for frequent and rare storms in the Adriatic Sea. Finally, Borgman's theory is applied to estimate the spatial pattern of the expected maximum wave height Hmax during a storm, both for the present climate and that of the future scenario. Results show a future wave climate in the Adriatic Sea milder than the present climate, even though increases of wave severity can occur locally.

  2. Operational ocean models in the Adriatic Sea: a skill assessment

    Directory of Open Access Journals (Sweden)

    J. Chiggiato

    2008-02-01

    Full Text Available In the framework of the Mediterranean Forecasting System (MFS project, the performance of regional numerical ocean forecasting systems is assessed by means of model-model and model-data comparison. Three different operational systems considered in this study are: the Adriatic REGional Model (AREG; the Adriatic Regional Ocean Modelling System (AdriaROMS and the Mediterranean Forecasting System General Circulation Model (MFS-GCM. AREG and AdriaROMS are regional implementations (with some dedicated variations of POM and ROMS, respectively, while MFS-GCM is an OPA based system. The assessment is done through standard scores. In situ and remote sensing data are used to evaluate the system performance. In particular, a set of CTD measurements collected in the whole western Adriatic during January 2006 and one year of satellite derived sea surface temperature measurements (SST allow to asses a full three-dimensional picture of the operational forecasting systems quality during January 2006 and to draw some preliminary considerations on the temporal fluctuation of scores estimated on surface quantities between summer 2005 and summer 2006.

    The regional systems share a negative bias in simulated temperature and salinity. Nonetheless, they outperform the MFS-GCM in the shallowest locations. Results on amplitude and phase errors are improved in areas shallower than 50 m, while degraded in deeper locations, where major models deficiencies are related to vertical mixing overestimation. In a basin-wide overview, the two regional models show differences in the local displacement of errors. In addition, in locations where the regional models are mutually correlated, the aggregated mean squared error was found to be smaller, that is a useful outcome of having several operational systems in the same region.

  3. The radiological exposure of man from ingestion of Cs-137 and Sr-90 in seafood from the Baltic Sea. Pilot project: Marina-Balt

    Energy Technology Data Exchange (ETDEWEB)

    Nielsen, S.P. [Risoe National Lab., Roskilde (Denmark); Oehlenschlaeger, M. [National Institute of Radiation Hygiene, Broenshoej (Denmark); Karlberg, O. [Swedish Radiation Protection Institute, Stockholm (Sweden)

    1995-04-01

    This report describes a limited radiological assessment of the collective doses to man from the intake of seafood from the Baltic Sea contaminated with the radionuclides Cs-137 and Sr-90. Information on fisheries statistics is presented. The most important source terms to radioactive contamination of Cs-137 and Sr-90 in the Baltic Sea are identified and quantified. A compartment model for the dispersion of radionuclides in European coastal waters including the Baltic Sea is described and tested by comparing model predictions with observations. Collective doses are calculated with the model for each of the source-term categories. (au) (11 tabs., 28 ills., 17 refs.).

  4. Digenea trematodes in fish of the North Adriatic Sea

    Directory of Open Access Journals (Sweden)

    Vesna PARADIŽNIK

    2007-12-01

    Full Text Available The paper gives an overview of trematodes that have been isolated from the north Adriatic Sea , during a 10-year research program. A total of 63 marine fish species of pelagic and benthic of the classes Chondrichthyes and Osteichthyes were analyzed. We found that 21 fish species ted digenean trematodes (33.33% prevalence, and 12 fish species are reported as hosts for the t time. During our research, 63 species of fish (total of 2659 fish were examined and 25.16 % e found invaded by endohelminths, belonging to 22 digeneans species.

  5. Pregnant Women in Louisiana Are Not Meeting Dietary Seafood Recommendations

    Directory of Open Access Journals (Sweden)

    M. L. Drewery

    2016-01-01

    Full Text Available Background. The 2015–2020 Dietary Guidelines for Americans recommend that pregnant women and women of childbearing ages consume 8–12 oz. of seafood per week. Fish are the major dietary source of omega-3 long chain polyunsaturated fatty acids, which have benefits for the mother and fetus. Methods. In this observational study, we investigated dietary habits of pregnant women in Baton Rouge, Louisiana, USA, to determine if they achieve recommended seafood intake. A print survey, which included commonly consumed foods from protein sources (beef, chicken, pork, and fish, was completed by pregnant women at a single-day hospital convention for expecting families in October 2015. Women (n=221 chose from six predefined responses to answer how frequently they were consuming each food. Results. Chicken was consumed most frequently (75% of women, followed by beef (71%, pork (65%, and fish (22%, respectively. Consumption frequency for the most consumed fish (catfish, once per month was similar to or lower than that of the least consumed beef, chicken, and pork foods. Consumption frequency for the most consumed chicken and beef foods was at least once per week. Conclusion. Our data indicate that pregnant women in Louisiana often consume protein sources other than fish and likely fail to meet dietary seafood recommendations.

  6. Mercury speciation analysis in seafood by species-specific isotope dilution: method validation and occurrence data

    Energy Technology Data Exchange (ETDEWEB)

    Clemens, Stephanie; Guerin, Thierry [Agence Nationale de Securite Sanitaire de l' Alimentation, Laboratoire de Securite des Aliments de Maisons-Alfort, Unite des Contaminants Inorganiques et Mineraux de l' Environnement, ANSES, Maisons-Alfort (France); Monperrus, Mathilde; Donard, Olivier F.X.; Amouroux, David [IPREM UMR 5254 CNRS - Universite de Pau et des Pays de l' Adour, Laboratoire de Chimie Analytique Bio-Inorganique et Environnement, Institut des Sciences Analytiques et de Physico-chimie pour l' Environnement et les Materiaux, Pau Cedex (France)

    2011-11-15

    Methylmercury (MeHg) and total mercury (THg) in seafood were determined using species-specific isotope dilution analysis and gas chromatography combined with inductively coupled plasma mass spectrometry. Sample preparation methods (extraction and derivation step) were evaluated on certified reference materials using isotopically enriched Hg species. Solid-liquid extraction, derivation by propylation and automated agitation gave excellent accuracy and precision results. Satisfactory figures of merit for the selected method were obtained in terms of limit of quantification (1.2 {mu}g Hg kg{sup -1} for MeHg and 1.4 {mu}g Hg kg{sup -1} for THg), repeatability (1.3-1.7%), intermediate precision reproducibility (1.5% for MeHg and 2.2% for THg) and trueness (bias error less than 7%). By means of a recent strategy based on accuracy profiles ({beta}-expectation tolerance intervals), the selected method was successfully validated in the range of approximately 0.15-5.1 mg kg{sup -1} for MeHg and 0.27-5.2 mg kg{sup -1} for THg. Probability {beta} was set to 95% and the acceptability limits to {+-}15%. The method was then applied to 62 seafood samples representative of consumption in the French population. The MeHg concentrations were generally low (1.9-588 {mu}g kg{sup -1}), and the percentage of MeHg varied from 28% to 98% in shellfish and from 84% to 97% in fish. For all real samples tested, methylation and demethylation reactions were not significant, except in one oyster sample. The method presented here could be used for monitoring food contamination by MeHg and inorganic Hg in the future to more accurately assess human exposure. (orig.)

  7. The study of lead content distribution in Chinese seafood and its oral bioavailability in mice.

    Science.gov (United States)

    Tong, Yongpeng; Zhu, Zhipeng; Hao, Xin; He, Long; He, Weibiao; Chen, Jianmin

    2016-01-01

    Using inductively coupled plasma mass spectrometry (ICP-MS), the lead concentrations and isotope ratios of 32 kinds of seafood collected from local markets of China were measured. Among these seafoods, the highest concentrations of lead were found in Patinopecten yessoensis and Mugil cephalus, which were 2.94 ± 0.40 and 2.02 ± 0.26 μg g(-1) of dry weight, respectively. Pb concentration was found to be higher in benthic fish than in other fish. The result indicated that lead concentrations in some seafood exceeded the maximum levels of Pb in foods proposed by European Commission (EC). Nine species of cooked seafood were chosen to feed mice (35-38 g). The result showed that Pb oral bioavailability of cooked seafood in vivo was below 10%. Furthermore, oral bioavailability of the same lead-containing seafood increased greatly in pregnant mice compared with non-pregnant mice.

  8. Adriatic calcarean sponges (Porifera, Calcarea, with the description of six new species and a richness analysis

    Directory of Open Access Journals (Sweden)

    Michelle Klautau

    2016-03-01

    Full Text Available In this study we analyze the calcarean sponge diversity of the Adriatic Sea, the type locality of some of the first described species of calcarean sponges. Morphological and molecular approaches are combined for the taxonomic identification. Our results reveal six species new to science and provisionally endemic to the Adriatic Sea (Ascandra spalatensis sp. nov., Borojevia croatica sp. nov., Leucandra falakra sp. nov., L. spinifera sp. nov., Paraleucilla dalmatica sp. nov., and Sycon ancora sp. nov., one species previously known only from the Southwestern Atlantic (Clathrina conifera, and three already known from the Adriatic Sea (Ascaltis reticulum, Borojevia cerebrum, and Clathrina primordialis. We confirm the presence of the alien species Paraleucilla magna in the Adriatic and again record Clathrina blanca, C. clathrus, and C. rubra. We emend the description of the genus Ascaltis, propose a lectotype for Borojevia cerebrum and synonymise B. decipiens with B. cerebrum. A checklist of all calcarean species previously and currently known from the Adriatic Sea (39 species is given. The Central Adriatic is indicated as the richest calcarean sponge fauna sector; however, the biodiversity of this class is underestimated in the whole Adriatic Sea and new systematic surveys are desirable.

  9. Ozone: an emerging technology for the seafood industry

    Directory of Open Access Journals (Sweden)

    Alex Augusto Gonçalves

    2009-12-01

    Full Text Available In recent years, increasing attention has been focused on the safety of foods, and in particular on the intervention methods to reduce and eliminate human pathogens from fresh product, especially fresh seafood. Traditional technology utilizes water with or without a sanitizing agent to wash fresh seafood. Chlorine is the most widely used sanitizing agent available for fresh product, but it has a limited effect in killing bacteria on seafood surfaces. An alternative treatment is being sought to improve food safety. Many research and industrial trials are underway to validate the use of ozone in the food industry. This article intends to show a clean technology to be applied in seafood industry and to show that many studies must be done to demonstrate the best concentrations and the best methods of ozone applications in diverse seafood species, so that the governments of all the countries can approve their application in the fishing industry.Nos últimos anos, tem sido cada vez maior a atenção concentrada na segurança dos alimentos e, em especial, sobre os métodos de intervenção para reduzir e eliminar os agentes patogênicos humanos de produtos frescos, principalmente o pescado fresco. Tecnologias tradicionais utilizam água, com ou sem um agente de desinfecção para lavagem do pescado fresco. O cloro é o agente sanitizante disponível mais amplamente utilizado para produtos frescos, mas tem um efeito limitado na eliminação de bactérias na superfície do pescado. Um tratamento alternativo está sendo procurado para melhorar a segurança alimentar. Muitas pesquisas e experimentos industriais estão em andamento para validar a utilização do ozônio na indústria de alimentos. Este artigo tenciona mostrar uma tecnologia limpa para ser aplicada na indústria do pescado e para mostrar que muitos estudos devem ser feitos para demonstrar as melhores concentrações e os melhores métodos de aplicação de ozônio em diversas espécies de

  10. Sources, Fate and Distribution of Organic Matter on the Western Adriatic Continental Shelf, Italy

    Energy Technology Data Exchange (ETDEWEB)

    Tesi, Tommaso, E-mail: tommaso.tesi@bo.ismar.cnr.it; Miserocchi, Stefano; Langone, Leonardo [ISMAR-CNR, Sede di Bologna - Geologia Marina (Italy); Boni, Laurita; Guerrini, Franca [Universita di Bologna, Laboratorio di Biologia e Fisiologia Algale, Sc. Ambientali (Italy)

    2006-12-15

    In the framework of the EUROSTRATAFORM projects, a multidisciplinary research was focused on processes that involve transport and deposition of riverine material in the Adriatic Sea. The aim of our contribution was to increase a more complete understanding of organic matter deposition on the Adriatic shelf, also taking into account the role of Apennine rivers beyond the Po influence. In order to characterize origin, fate and variability of sedimentary organic carbon we utilized elemental and stable carbon isotope data in surficial sediments along shallow cross-shelf transects on the western Adriatic shelf.

  11. Preliminary results of mercury levels in raw and cooked seafood and their public health impact.

    Science.gov (United States)

    Costa, Fernanda do N; Korn, Maria Graças A; Brito, Geysa B; Ferlin, Stacy; Fostier, Anne H

    2016-02-01

    Mercury is toxic for human health and one of the main routes of exposure is through consumption of contaminated fish and shellfish. The objective of this work was to assess the possible mercury contamination of bivalves (Anomalocardia brasiliana, Lucina pectinata, Callinectes sapidus), crustacean (C. sapidus) and fish (Bagre marinus and Diapterus rhombeus) collected on Salinas da Margarida, BA (Brazil), a region which carciniculture, fishing and shellfish extraction are the most important economic activities. The effect of cooking on Hg concentration in the samples was also studied. The results showed that Hg concentration was generally higher in the cooked samples than in raw samples. This increase can be related to the effect of Hg pre-concentration, formation of complexes involving mercury species and sulfhydryl groups present in tissues and/or loss of water and fat. The highest concentrations were found in B. marinus samples ranging 837.0-1585.3 μg kg(-1), which exceeded those recommended by Brazilian Health Surveillance Agency (ANVISA). In addition, Hg values found in the other samples also suggest the monitoring of the Hg concentrations in seafood consumed from the region.

  12. Intake of Seafood in the US Varies by Age, Income, and Education Level but Not by Race-Ethnicity

    Directory of Open Access Journals (Sweden)

    Lisa Jahns

    2014-12-01

    Full Text Available Current US federal dietary guidance recommends regular consumption of seafood (fish + shellfish to promote health; however, little is known about how well Americans meet the guideline, particularly population subgroups that may be at risk for inadequate intake. The purposes of this study were to describe the prevalence of seafood consumption and, among consumers, the amounts of seafood eaten by sex, age group, income and education level, and race-ethnicity. Data from 15,407 adults aged 19+ participating in the 2005–2010 National Health and Nutrition Examination Surveys were analyzed using methods to account for sporadic intake of seafood. Over 80% of Americans reported consuming any seafood over the past 30 days, 74% reported consuming fish, and 54% reported eating shellfish. The percentages varied by socio-demographic group. Younger age and lower income and education levels were associated with lower odds of being a seafood consumer (p < 0.0001. Among those who reported eating seafood, the average amount eaten of any seafood was 158.2 ± 5.6 g/week. Among seafood consumers, women and individuals of lower age and education levels consumed less seafood. Approximately 80%–90% of seafood consumers did not meet seafood recommendations when needs were estimated by energy requirements. A great deal of work remains to move Americans toward seafood consumption at current recommended levels.

  13. [Molecular Detection Methods for Vibrio parahaemolyticus in Seafood].

    Science.gov (United States)

    Nishio, Tomohiro; Ohtsuka, Kayoko; Oda, Midori; Sugiyama, Kanji; Hara-Kudo, Yukiko

    2015-07-01

    To detect Vibrio parahaemolyticus in seafood, we evaluated efficient combinations of molecular methods with DNA extraction methods using heat extraction and alkaline heat extraction, and PCR, real-time PCR and loop-mediated isothermal amplification (LAMP) assays were performed targeting V parahaemolyticus species-specific genes (tlh and rpoD) and pathogenic factors genes (tdh and trh). The species-specific genes were detected in all combinations of two strains (a tdh * trh1-positive strain and a trh2-positive strain), two kinds of shellfish (oyster and bloody clams) and molecular methods with tlh-real time PCR or rpoD-LAMP assays with DNA of alkaline heat extraction at 85-145cfu/test level. tdh was detected in both seafoods with real time PCR assay with DNA of heat extraction at 85cfu/test level, and detected with the LAMP and real time PCR assays with DNA of alkaline heat extraction at 85cfu/test level. Detection of both trh1 and trh2 with the PCR assay with DNA of alkaline heat extraction was comparatively high though trh2 was detected with the LAMP assay with DNA of alkaline heat extraction at 145cfu/test level. It, however, is necessary to investigate more sensitive trh-detection methods. In this study, the results indicated that tlh-real time PCR or rpoD-LAMP, tdh-real time PCR and tdh-LAMP assays with DNA of alkaline heat extraction are relatively-sensitive methods to detect V. parahaemolyticus in seafood.

  14. Variability of PAHs and trace metals in the sediments in relation to environmental characteristics of the bottom layer in the middle Adriatic Sea

    Science.gov (United States)

    Grilli, Federica; Frapiccini, Emanuela; Campanelli, Alessandra; Guicciardi, Stefano; Marini, Mauro; Marasovic, Ivona; Grbec, Branka; Skejić, Sanda; Ujević, Ivana; Lušić, Jelena

    2015-04-01

    towards the Italian coast. The total PAHs concentrations (sum of 16 PAH priority pollutant - US EPA) recorded in the marine sediments during the cruise in April 2013 showed a higher level of PAH contamination in the pits, especially in the central pit (28.5 ng/g d.w.), in comparison to others analyzed samples. The corresponding bottom water in the central pit is characterized by a temperature of 10.9°C, density of 29.6 kg/m3, salinity of 38.6 and low values of DIN (0.55 μmol•l-1). The linear regression between DIN and PAHs showed a significant negative relationship (p ≤ 0.05). This feature implies a possible accumulation of PAHs very likely due to a lower microbial activity as demonstrated by Xu et al. (2014). The physical and chemical characteristics of the bottom layer in these areas could influence the PAHs contamination of the deep sediments. Bibliography: Grbec, B. and Morović, M. (1997): Seasonal thermohaline fluctuations in the middle Adriatic Sea. Nuovo Cimento della Societa Italiana di Fisica C-Geophysics & Space Physics. 20(4): 561-576. Grilli F., Marini M., Book J. W., Campanelli A., Paschini E., Russo A., 2013. Flux of nutrients between the middle and southern Adriatic Sea (Gargano-Split section). Marine Chemistry 153,1-14. Marini, M., Russo, A., Paschini, E., Grilli, F., Campanelli, A., 2006. Short-term physical and chemical variations in the bottom water of middle Adriatic depressions. Climate Research 31, 227-237. Meiying Xu, Qin Zhang, Chunyu Xia, Yuming Zhong, Guoping Sun, Jun Guo, Tong Yuan, Jizhong Zhou and Zhili He, 2014. Elevated nitrate enriches microbial functional genes for potential bioremediation of complexly contaminated sediments. The ISME Journal 8, 1932-1944 | doi:10.1038/ismej.2014.42 Marasović I., Grbec B. & Morović M., 1995. Long term production changes in the Adriatic. Neth. J. of Sea Res. 34 (4): 267-273. Vilibić I., Grbec B. and Supić N., 2004. Dense water generation in the north Adriatic in 1999 and its recirculation along

  15. Numerical modelling of sediment transport in the Adriatic Sea

    Directory of Open Access Journals (Sweden)

    A. Guarnieri

    2014-06-01

    Full Text Available A new sediment transport model, considering currents, tides and waves is presented for the Adriatic Sea basin. The simulations concentrate on the winter of 2002–2003 because of field data availability and interesting intermittent processes occurrence. A process oriented analysis is performed to investigate the impact that Sirocco and Bora wind regimes have on sediment transport. The comparisons of the simulations with the observed data show that the model is capable to capture the main dynamics of sediment transport along the Italian coasts and the sediment concentration within the water column. This latter can reach values up to several g L−1, especially within the first centimetres above the bottom. The sediments are transported mainly southwards along the Italian coasts, consistently with the known literature results, except during Sirocco wind events, which can be responsible for reversing the coastal circulation in the northern area of the basin, and consequently the sediment transport. The resuspension of sediments is also related to the specific wave regimes induced by Bora and Sirocco, the former inducing resuspension events near the coasts while the latter causing a more diffused resuspension regime in the Northern Adriatic basin. Beside the realistic representation of short timescales resuspension/deposition events due to storms, the model was also used to investigate persistent erosion or deposition areas in the Adriatic Sea. Two main depocenters were identified: one, very pronounced, in the surroundings of the Po river delta, and another one a few kilometres off the coast in front of the Ancona promontory. A third region of accumulation, even if less intense, was found to be offshore the southernmost limit of the Gargano region. On the contrary the whole western coast within a distance of a few kilometres from the shore was found to be subject to prevailing erosion. The comparison with observed accumulation and erosion data shows

  16. The Adriatic region: An independent microplate within the Africa-Eurasia collision zone

    OpenAIRE

    Battaglia, M.; Seismological Laboratory, University of California, Berkeley, California, USAIstituto Nazionale di Oceanografia e Geofisica Sperimentale, Centro Ricerche Sismologiche, Udine, Italy; Murray, M. H.; Seismological Laboratory, University of California, Berkeley, California, USA; Serpelloni, E.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione CNT, Roma, Italia; Burgmann, R.; Department of Earth and Planetary Science, University of California, Berkeley, California, USA

    2004-01-01

    [1] We use GPS measurements and block modeling to investigate the present-day deformation of the Adriatic region, whose kinematics within the Nubia-Eurasia plate boundary zone is not well constrained and remains controversial. Block modeling allows us to compute rigidplate angular velocities while accounting for elastic strain accumulation along block-bounding faults. Results suggest that the Adriatic is a microplate (Adria) and that the southern boundary with the Nubi...

  17. ADCP Observations of the Western Adriatic Slope Current During Winter of 2001

    Science.gov (United States)

    2005-05-23

    northern and central Adriatic Sea. Journal of Marine Systems , 20, 279-300. Cavaleri, L. (2000). The oceanographic tower Acqua Alta - activity and...Northern Adriatic Sea surface circulation and temperature/pigment fields in September and October 1997. Journal of Marine Systems , 29, 51-67. Orli6, M...drifter data between 1990 and 1999. Journal of Marine Systems , 29, 3-32. Pullen, J., Doyle, J. D., Hodur, R., Ogsten, A., Book, J. W., Perkins, H

  18. Long-term variability of the southern Adriatic circulation in relation to North Atlantic Oscillation

    OpenAIRE

    L. Shabrang; Menna, M.; C. Pizzi; Lavigne, H.; Civitarese, G.; Gačić, M.

    2016-01-01

    The interannual variability of the South Adriatic Gyre and its relation to the wind vorticity and the large-scale climatic pattern (North Atlantic Oscillation – NAO) was studied using the time series of satellite altimetric data and ocean surface wind products. The cyclonic circulation observed in the southern Adriatic area was partly sustained by the local wind forcing, as suggested by the positive correlation between the rate of change of the current vorticity and the wind...

  19. A High Throughput Method for Measuring Polycyclic Aromatic Hydrocarbons in Seafood Using QuEChERS Extraction and SBSE

    Directory of Open Access Journals (Sweden)

    Edward A. Pfannkoch

    2015-01-01

    Full Text Available National Oceanic and Atmospheric Administration (NOAA Method NMFS-NWFSC-59 2004 is currently used to quantitatively analyze seafood for polycyclic aromatic hydrocarbon (PAH contamination, especially following events such as the Deepwater Horizon oil rig explosion that released millions of barrels of crude oil into the Gulf of Mexico. This method has limited throughput capacity; hence, alternative methods are necessary to meet analytical demands after such events. Stir bar sorptive extraction (SBSE is an effective technique to extract trace PAHs in water and the quick, easy, cheap, effective, rugged, and safe (QuEChERS extraction strategy effectively extracts PAHs from complex food matrices. This study uses SBSE to concentrate PAHs and eliminate matrix interference from QuEChERS extracts of seafood, specifically oysters, fish, and shrimp. This method provides acceptable recovery (65–138% linear calibrations and is sensitive (LOD = 0.02 ppb, LOQ = 0.06 ppb while providing higher throughput and maintaining equivalency between NOAA 2004 as determined by analysis of NIST SRM 1974b mussel tissue.

  20. Modelling and predicting the simultaneous growth of Listeria monocytogenes and psychrotolerant lactic acid bacteria in processed seafood and mayonnaise-based seafood salads

    DEFF Research Database (Denmark)

    Mejlholm, Ole; Dalgaard, Paw

    2015-01-01

    A new combined model for Listeria monocytogenes and psychrotolerant Lactobacillus spp. was constructed and evaluated for processed seafood and mayonnaise-based seafood salads. The new model was constructed by combining existing cardinal parameter models for L. monocytogenes and Lactobacillus spp....... using the classical Jameson effect to model microbial interaction. Maximum population density (MPD) values of L. monocytogenes were accurately predicted in processed seafood with a known initial cell concentration of Lactobacillus spp. For these experiments, average MPD values of 4.5 and 4.3 log (cfu....../g) were observed and predicted, respectively for L. monocytogenes. In seafood salads, growth of L. monocytogenes continued at a reduced growth rate after Lactobacillus sakei had reached their MPD. This growth pattern was successfully described by an expanded version of the classical Jameson effect model...

  1. A voice-of-consumer approach in development of new seafood product concepts

    NARCIS (Netherlands)

    Altintzoglou, T.; Einarsdóttir, G.; Valsdóttir, T.; Schelvis, R.; Skåra, T.; Luten, J.B.

    2010-01-01

    This article describes a consumer-based approach for development of new seafood product concepts among young adults in Norway and Iceland. The study aim was to gain insight into how young adults determine their acceptance of seafood and make potential product choices. Additional insights measured we

  2. Processing, quality and safety of irradiation - and high pressure processed meat and seafood products

    Science.gov (United States)

    In the past two decades, worldwide demands for meat and seafood products have increased dramatically due to the improved economical condition in many countries. To meet the demand, the producers have increased the production of meat and seafood products as well as applied new processing techniques t...

  3. Total mercury content in fish und molluscs from Adriatic sea

    Energy Technology Data Exchange (ETDEWEB)

    Vedrina-Dragojevic, I. [Zagreb Univ. (Croatia). Dept. of Food Chemistry; Dragojevic, D. [Water Quality Dept., Waterworks, Zagreb (Croatia); Bujan, M. [Zagreb Univ. (Croatia). Dept. of Chemistry

    2002-07-01

    In regard to a long known and still persisting problem of the ecosystem loaded with mercury, total mercury contents in different species of fish and molluscs in the Adriatic Sea have been followed in an interval of 12 years. Total mercury concentrations were determined by cold vapour atomic adsorption spectrometry (CVAAS) at 253. 7 nm after digestion of the edible of fish tissues. The results of analysis reveal positive shifts and unlike the samples in a previous study all the investigated samples meet the conditions of the Public Health Regulations on the quantity of pesticides, mycotoxins, metals, histamine and similar substances that may occur in foodstuff and on other conditions as to the standards of foodstuff and objects of general use, which fixed the total Hg content at maximum of 0.5 mg/kg on the basis of fresh mass. (orig.)

  4. Spring 2009 Water Mass Distribution, Mixing and Transport in the Southern Adriatic after a Low Production of Winter Dense Waters

    Science.gov (United States)

    2013-05-21

    the southern Adriatic basin and meets warm and salty Modified Levantine Intermediate Water (MLIW) coming from the Ionian Sea. This study examine...and fresh intermediate water enters the southern Adriatic basin and meets warm and salty Modified Levantine Intermediate Water (MLIW) coming from the...Spring of 2009 can be observed in T–S space (Triangle 2) in Fig. 2. The saltiness of ADW compared to other Adriatic water masses is heavily influenced by

  5. Dioxin-like polychlorinated biphenyls, polychlorinated dibenzo-p-dioxins, and polychlorinated dibenzofurans in seafood samples from Malaysia: estimated human intake and associated risks.

    Science.gov (United States)

    Leong, Yin-Hui; Gan, Chee-Yuen; Majid, Mohamed Isa Abdul

    2014-07-01

    A total of 127 and 177 seafood samples from Malaysia were analyzed for polychlorinated dibenzo-p-dioxins/dibenzofurans (PCDD/Fs) and dioxin-like polychlorinated biphenyls (dl-PCBs), respectively. The World Health Organization-toxic-equivalency quotients (WHO-TEQ) of PCDD/Fs varied from 0.13 to 1.03 pg TEQ g(-1), whereas dl-PCBs ranged from 0.33 to 1.32 pg TEQ g(-1). Based on food-consumption data from the global environment monitoring system-food contamination monitoring and assessment programme, calculated dietary exposures to PCDD/Fs and dl-PCBs from seafood for the general population in Malaysia were 0.042 and 0.098 pg TEQ kg(-1) body weight day(-1), respectively. These estimations were quite different from the values calculated using the Malaysian food-consumption statistics (average of 0.313 and 0.676 pg TEQ kg(-1) body weight day(-1) for PCDD/Fs and PCBs, respectively). However, both of the dietary exposure estimations were lower than the tolerable daily intake recommended by WHO. Thus, it is suggested that seafood from Malaysia does not pose a notable risk to the health of the average consumer.

  6. HACCP在禽肉、水产品加工中的应用%HACCP in Poultry and Seafood

    Institute of Scientific and Technical Information of China (English)

    陈本洲; 李海锋

    2003-01-01

    Poultry and seafood are important parts of food processing. In this article, the seven principles of HACCP and its application in poultry and seafood were described. From material to product, the hazard was deeply analysis. Based on this analysis, many methods were put up for setting up HACCP system in poultry and seafood factories, the relation of trade and HACCP also has been narrated.

  7. Levels and distribution of methoxylated and hydroxylated polybrominated diphenyl ethers in plant and soil samples surrounding a seafood processing factory and a seafood market.

    Science.gov (United States)

    Sun, Jianteng; Liu, Jiyan; Liu, Yanwei; Jiang, Guibin

    2013-05-01

    Polybrominated diphenyl ethers (PBDEs) along with hydroxylated polybrominated diphenyl ethers (OH-PBDEs) and methoxylated polybrominated diphenyl ethers (MeO-PBDEs) were found in plant and soil samples collected surrounding a seafood processing factory and a seafood market in China. The profiles of MeO-PBDE congeners were different between seafood processing factory and seafood market. The detection frequency and concentration of 6-OH-BDE-47 were lower than that of MeO-PBDEs. Near seafood processing factory, a decreasing trend of analyte concentrations in plants was found downstream the river where factory wastewater was discharged. Concentrations of ΣMeO-PBDEs in plant and soil samples showed difference as root > soil > leaf. However, at seafood market, the concentrations of ΣMeO-PBDEs were much higher in leaves than those in soil. The concentration of ΣMeO-PBDEs in leaves showed a remarkable difference between Calystegia soldanella (Linn.) R. Br. and Setaira viridis (L.) Beauv.

  8. Vulnerability to shocks in the global seafood trade network

    Science.gov (United States)

    Gephart, Jessica A.; Rovenskaya, Elena; Dieckmann, Ulf; Pace, Michael L.; Brännström, Åke

    2016-03-01

    Trade can allow countries to overcome local or regional losses (shocks) to their food supply, but reliance on international food trade also exposes countries to risks from external perturbations. Countries that are nutritionally or economically dependent on international trade of a commodity may be adversely affected by such shocks. While exposure to shocks has been studied in financial markets, communication networks, and some infrastructure systems, it has received less attention in food-trade networks. Here, we develop a forward shock-propagation model to quantify how trade flows are redistributed under a range of shock scenarios and assess the food-security outcomes by comparing changes in national fish supplies to indices of each country’s nutritional fish dependency. Shock propagation and distribution among regions are modeled on a network of historical bilateral seafood trade data from UN Comtrade using 205 reporting territories grouped into 18 regions. In our model exposure to shocks increases with total imports and the number of import partners. We find that Central and West Africa are the most vulnerable to shocks, with their vulnerability increasing when a willingness-to-pay proxy is included. These findings suggest that countries can reduce their overall vulnerability to shocks by reducing reliance on imports and diversifying food sources. As international seafood trade grows, identifying these types of potential risks and vulnerabilities is important to build a more resilient food system.

  9. Factors influencing the consumption of seafood among young children in Perth: a qualitative study

    Directory of Open Access Journals (Sweden)

    Howat Peter A

    2007-06-01

    Full Text Available Abstract Background This formative study sought to explore the factors that influence the consumption of fish and seafood among 4–6 year old children in the Perth metropolitan area. Focus groups were conducted with mothers of young children to gain insights into the enablers and barriers to regular seafood consumption in children, and the knowledge, attitudes and perceptions of their mothers to including seafood as a regular part of their children's diet. Methods Purposive sampling techniques were used to select and recruit mothers of children aged between four and six years from within the Perth metropolitan area. A total of seven focus groups were conducted. Thematic content analysis was employed to code data generated and to extract major themes. Results Findings indicated that all children of study participants had tried fish and seafood products, with some being exposed to a wide variety from an early age. Across focus groups, several dominant factors were apparent in influencing the frequency and type of seafood purchased and consumed. Perceived cost, freshness, availability/accessibility, and the level of confidence to prepare a meal to suit all family members were significant determinants of whether seafood featured regularly on the household menu. The influence of others in the family (particularly the husband or partner also tended to impact upon the likelihood of serving fish and seafood, and the types of products mothers were willing to serve. Conclusion Findings from this qualitative study indicate that interventions seeking to promote seafood (particularly fish as an integral part of a healthy diet should address existing negative attitudes and beliefs around the storage and preparation of seafood. The influence of dominant male influences within the family unit should also be considered. Strategies directed at parents and children should include experimental 'hands-on' components to encourage experimentation, particularly

  10. From Reef to Table: Social and Ecological Factors Affecting Coral Reef Fisheries, Artisanal Seafood Supply Chains, and Seafood Security.

    Directory of Open Access Journals (Sweden)

    John N Kittinger

    Full Text Available Ocean and coastal ecosystems provide critical fisheries, coastal protection, and cultural benefits to communities worldwide, but these services are diminishing due to local and global threats. In response, place-based strategies involve communities and resource users in management have proliferated. Here, we present a transferable community-based approach to assess the social and ecological factors affecting resource sustainability and food security in a small-scale, coral reef fishery. Our results show that this small-scale fishery provides large-scale benefits to communities, including 7,353 ± 1547 kg yr(-1 (mean ± SE of seafood per year, equating to >30,000 meals with an economic value of $78,432. The vast majority of the catch is used for subsistence, contributing to community food security: 58% is kept, 33.5% is given away, and 8.5% is sold. Our spatial analysis assesses the geographic distribution of community beneficiaries from the fishery (the "food shed" for the fishery, and we document that 20% of seafood procured from the fishery is used for sociocultural events that are important for social cohesion. This approach provides a method for assessing social, economic, and cultural values provided by small-scale food systems, as well as important contributions to food security, with significant implications for conservation and management. This interdisciplinary effort aims to demonstrate a transferable participatory research approach useful for resource-dependent communities as they cope with socioeconomic, cultural, and environmental change.

  11. The good, the bad, and the ugly: weighing the risks and benefits of seafood consumption.

    Science.gov (United States)

    Morrissey, Michael T

    2006-01-01

    The health benefits that long chain omega-3 fatty acids contribute in the reduction of coronary heart disease are well established through a number of scientific publications. A number of studies are also examining their potential role in mitigating other diseases and health conditions such as Alzheimer's and mental disorders. Some of the latest research have shown the importance of omega-3 fatty acids such as docosahexaenoic acid in cognitive development in infants. Extensive scientific research and recommendations to consume fish regularly from professional societies, health organizations, and government agencies consistently support dietary guidance to consume fish regularly. Nevertheless, increasingly consumers are being warned to eliminate or minimize their consumption of certain species. The warnings, which have been issued due to risks associated with chemical contaminates such as mercury, PCB, and dioxin in fish, have received extensive coverage in news articles and stories in popular magazines. There have been a series of mixed messages to the consumer about the benefits or risks in eating seafood. In some cases, the warnings have been issued by government agencies such as the Food and Drug Administration and Environmental Protection Agency's Joint Fish Advisory on methylmercury. In other cases, the warnings have come from advocacy groups and others. Unfortunately, the advice is often miscommunicated and misunderstood by consumers. The emerging news about the benefits and risks of fish consumption will be discussed in the context of their impacts on consumer's health and well-being.

  12. Rapid detection of chemical hazards (toxins, dioxins, and PCBs) in seafood.

    Science.gov (United States)

    Arvanitoyannis, Ioannis S; Kotsanopoulos, Konstantinos V; Papadopoulou, Anna

    2014-01-01

    Among the various hazards occurring in fish and seafood chemical hazards and in particular toxins (ciguatera, scombroid fish poisoning, paralytic shellfish poisoning, neurotoxic (brevetoxic) shellfish poisoning, puffer fish poisoning, diarrhetic shellfish poisoning) have an important place in food poisoning cases. On the other hand, some of the chemical hazards are often due to the pollution of the environment (heavy metals, dioxins, polychlorinated biphenyls, and halogenated aromatic hydrocarbons) and their detection is neither rapid nor facile. As a result there was a great need for developing new rapid and effective methods toward the chemical hazards determination mainly because of their high toxicity. The aim of this review is to provide the information about the new up-to-date detection techniques (Immunological, Chemical and Biochemical, and Molecular assays) in conjunction with detection limits. The latter is made possible by means of inclusion of seven comprehensive and, in most case cases, very extended tables. A reference is also made on the risk characterization of toxins as regards their importance to food contamination or poisoning.

  13. Long-term decline of radiocesium concentration in seafood from the Ligurian Sea (Northern Italy) after Chernobyl

    Energy Technology Data Exchange (ETDEWEB)

    Gallelli, Giovanni; Panatto, Donatella; Perdelli, Fernanda [Istituto di Igiene e Medicina Preventiva, Universitadi Genova, Genova (Italy); Pellegrino, Claudio [Istituto Zooprofilattico Sperimentale del Piemonte Liguria, Val d`Aosta (Italy)

    1997-02-28

    The activity of {sup 137}Cs, {sup 134}Cs and {sup 40}K in tissues from fish, mollusc and shellfish of the Ligurian sea was measured during 1987-1988. The mean annual concentrations in 1987 were 5.92{+-}4.1 Bq/kg (wet tissue) for {sup 137}Cs and 2.7{+-}1.5 Bq/kg for {sup 134}Cs and 2.46{+-}1.82 and 0.33{+-}0.57 Bq/kg respectively in 1988. The mean value of {sup 40}K activity was 138.6{+-}22.1 Bq/kg. Contamination was significantly higher in the littoral area up to 1000m from the coast (8.39{+-}7.6 and 1.74{+-}2.08 Bq/kg respectively versus 2.91{+-}1.87 and 0.58{+-}0.59 Bq/kg respectively in the open sea). The common octopus (Octopus vulgaris) had the highest radioactivity values and could be utilized as an indicator of radioactivity pollution. There were no significant differences regarding the trophic level, the seafood phylum, or the east and west Ligurian sea areas. Long-term reduction in the sea habitat was estimated at about 200 days for {sup 137}Cs and 110 days for {sup 134}Cs, reflecting differences in the physical half-life of these radionuclides. These values were lower than those found in terrestrial foodstuff and could have reflected dilution of the contaminants in the open sea. The effective dose equivalent for the Ligurian population of radiocesium originating from seafood was estimated at 1.3 {mu}Sv in 1987 and 0.5 {mu}Sv in 1988. These values represent 0.8 and 0.3% respectively of the annual dose (180 {mu}Sv/year) due to {sup 40}K intake with the diet.

  14. Vibrio cholerae and Vibrio parahaemolyticus detected in seafood products from Senegal.

    Science.gov (United States)

    Coly, Ignace; Sow, Amy Gassama; Seydi, Malang; Martinez-Urtaza, Jaime

    2013-12-01

    The detection of pathogenic Vibrio in seafood from Senegal has generated five food alerts in the European Union. To investigate the presence and abundance Vibrio cholerae and Vibrio parahaemolyticus in seafood and coastal and estuarine waters, 123 seafood samples and 52 water samples were collected during 2007-2009 from two large seafood markets in Dakar, and from different oceanic and estuarine areas of the country. V. parahaemolyticus was detected in 30.1% of seafood samples, whereas presence of V. cholerae was only found in 1.6%. In water samples, V. parahaemolyticus and V. cholerae were detected in 28.8% and 5.7% of the samples, respectively. Abundance of V. parahaemolyticus in seafood from the fishing areas ranged from 110 MPN/g. Densities of V. cholerae in the two positive seafood samples reached values of 0.36 and 0.61 MPN/g, repectively. V. parahaemolyticus strains were found to possess tlh, but not tdh and trh by polymerase chain reaction, and all the strains of V. cholerae were non-O1 or non-O139. These results suggest that the prevalence of high salinities in coastal and estuarine environments of Senegal limits the occurrence of V. parahaemolyticus and V. cholerae, despite warmer temperatures prevailing in seawater environments throughout the year. Furthermore, temperature abuse driven by a deficient cold chain over the distribution and retail sales may represent a major risk due to the postharvest multiplication of these Vibrio pathogens.

  15. Use of DNA barcoding to reveal species composition of convenience seafood.

    Science.gov (United States)

    Huxley-Jones, Elizabeth; Shaw, Jennifer L A; Fletcher, Carly; Parnell, Juliette; Watts, Phillip C

    2012-04-01

    Increased education of consumers can be an effective tool for conservation of commercially harvested marine species when product labeling is accurate and allows an informed choice. However, generic labeling (e.g., as white fish or surimi) and mislabeling of seafood prevents this and may erode consumer confidence in seafood product labels in general. We used DNA barcoding to identify the species composition of two types of convenience seafood (i.e., products processed for ease of consumption): fish fingers (long pieces of fish covered with bread crumbs or batter, n = 241) and seafood sticks (long pieces of cooked fish, n = 30). In products labeled as either white fish or surimi, four teleost species were present. Less than 1.5% of fish fingers with species-specific information were mislabeled. Results of other studies show substantially more mislabeling (e.g., >25%) of teleost products, which likely reflects the lower economic gains associated with mislabeling of convenience seafood compared with whole fillets. In addition to species identification, seafood product labels should be required to contain information about, for example, harvesting practices, and our data indicate that consumers can have reasonable confidence in the accuracy of the labels of convenience seafood and thus select brands on the basis of information about current fisheries practice.

  16. Advanced glycation endproducts in 35 types of seafood products consumed in eastern China

    Science.gov (United States)

    Wang, Jing; Li, Zhenxing; Pavase, Ramesh Tushar; Lin, Hong; Zou, Long; Wen, Jie; Lv, Liangtao

    2016-08-01

    Advanced glycation endproducts (AGEs) have been recognized as hazards in processed foods that can induce chronic diseases such as cardiovascular disease, diabetes, and diabetic nephropathy. In this study, we investigated the AGEs contents of 35 types of industrial seafood products that are consumed frequently in eastern China. Total fluorescent AGEs level and Nɛ-carboxymethyl-lysine (CML) content were evaluated by fluorescence spectrophotometry and gas chromatography-mass spectrometry (GC-MS), respectively. The level of total fluorescent AGEs in seafood samples ranged from 39.37 to 1178.3 AU, and was higher in canned and packaged instant aquatic products that were processed at high temperatures. The CML content in seafood samples ranged from 44.8 to 439.1 mg per kg dried sample, and was higher in roasted seafood samples. The total fluorescent AGEs and CML content increased when seafood underwent high-temperature processing, but did not show an obvious correlation. The present study suggested that commonly consumed seafood contains different levels of AGEs, and the seafood processed at high temperatures always displays a high level of either AGEs or CML.

  17. Prevalence of Seafood Allergy in Student Living in Bushehr and Borazjan

    Directory of Open Access Journals (Sweden)

    Shockrolla Farrokhi

    2014-08-01

    Full Text Available Background: Seafood allergy is potentially severe, but the prevalence of this group of food allergies in Iran, has not been determined. The objective of this study was to estimate the prevalence of seafood allergy in student living in Bushehr and Borazjan. Materials and Methods: We performed a cross-sectional, random school survey by using a questionnaire in 2012-13. A total of 608 (36% male, and 64% female were asked questions about personal and family history of allergies, food and seafood allergy. Results: The overall prevalence of food allergy was 12% (Total 73 subjects, 69.8% male and 30.2% female, and seafood allergy was 4.4% (Total 27 subjects, 36.6% male, 43.4% female. Fish allergy (1.4% and shrimp and shellfish allergy (3.5% were reported. The most frequently reported symptoms were skin (49.3%, gastrointestinal (28.7%, and respiratory reactions (2.7%. Seafood allergy was not associated with subjects reporting atopic diseases, significantly (P> 0.05, while the other food allergy was positively associated (P=0.00. Conclusion: Our study is the first report on prevalence estimates for seafood allergy in Bushehr province. Findings indicated high prevalence of seafood allergy in student, therefore further studies and significant health concern is needed.

  18. Sustainable Multi-Product Seafood Production Planning Under Uncertainty

    Science.gov (United States)

    Simanjuntak, Ruth; Sembiring, Monalisa; Sinaga, Rani; Pakpahan, Endang J.; Mawengkang, Herman

    2013-04-01

    A multi-product fish production planning produces simultaneously multi fish products from several classes of raw resources. The goal in sustainable production planning is to meet customer demand over a fixed time horizon divided into planning periods by optimizing the tradeoff between economic objectives such as production cost, waste processed cost, and customer satisfaction level. The major decisions are production and inventory levels for each product and the number of workforce in each planning period. In this paper we consider the management of small scale traditional business at North Sumatera Province which performs processing fish into several local seafood products. The inherent uncertainty of data (e.g. demand, fish availability), together with the sequential evolution of data over time leads the sustainable production planning problem to a nonlinear mixed-integer stochastic programming model. We use scenario generation based approach and feasible neighborhood search for solving the model.

  19. Saltwater Intrusion in Coastal Aquifers: A Primary Case Study along the Adriatic Coast Investigated within a Probabilistic Framework

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    Giada Felisa

    2013-11-01

    Full Text Available Environmentally sensitive areas along coastlines may be adversely affected by saltwater intrusion (SI, a condition which can be worsened by extensive groundwater extraction. Given the uncertainty of problem parameters, the risk of contamination of the vegetation capture zone needs to be cast in a probabilistic framework. In order to exemplify real situations existing along the Adriatic coast of Emilia-Romagna, a case study involving a pinewood strip and a well field drawing freshwater from an unconfined coastal aquifer was examined. On the basis of a widely adopted sharp interface formulation, key hydrogeological problem parameters were modeled as random variables, and a global sensitivity analysis was carried out to determine their influence on the position of the interface. This analysis utilized an efficient model reduction technique based on Polynomial Chaos Expansion. The risk that saltwater intrusion affects coastal vegetation was then evaluated via a two-step procedure by computing the probability that (i the leading edge of the saltwater wedge reaches the sensitive area in the horizontal plane, and (ii the freshwater/saltwater interface reaches the capture zone. The influence of the design parameters of the well field on the overall probability of contamination was investigated, revealing the primary role of the pumping discharge in the examined configuration.

  20. "Protected" marine shelled molluscs: thriving in Greek seafood restaurants

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    S. KATSANEVAKIS

    2012-12-01

    Full Text Available International agreements as well as European and national legislation prohibit exploitation and trading of a number of edible marine shelled molluscs, due to either significant declines in their populations or destructive fishing practices. However, enforcement of existing legislation in Greece is ineffective and many populations of “protected” species continue to decline, mainly due to poaching. The extent of illegal trading of protected bivalves and gastropods in Greek seafood restaurants was investigated by interviewing owners or managers of 219 such restaurants in 92 localities. Interviews were based on questionnaires regarding the frequency of availability in the menus and the origin of twenty-one species or groups of species, among which eight are protected - illegally exploited. Forty-two percent of the surveyed restaurants were found to serve at least one of the protected ¬- illegally exploited species. Among the illegally traded species, Lithophaga lithophaga, Pecten jacobaeus, and Pinnanobilis were served in a relatively high proportion of the surveyed restaurants (22.8%, 19.2%, and 16.4% respectively, outrunning many commercial species. In many cases these species were always or often available (11.4%, 4.6% and 5.0% respectively. There was substantial spatial variation in the proportion of restaurants that illegally served protected species with differing patterns for each species; very high proportions of illegal trading were observed in some marine regions (e.g., date mussels were served in >65% of the seafood restaurants along the coastline of Evvoikos Gulf. In most cases the illegally traded species were of local origin, while there was no finding of illegally imported molluscs from other countries. The strategy for enforcement of existing legislation should be greatly improved otherwise protection of shelled molluscs will remain ineffective.

  1. Operational ocean models in the Adriatic Sea: a skill assessment

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    J. Chiggiato

    2006-12-01

    Full Text Available In the framework of the Mediterranean Forecasting System project (MFS sub-regional and regional numerical ocean forecasting systems performance are assessed by mean of model-model and model-data comparison. Three different operational systems have been considered in this study: the Adriatic REGional Model (AREG; the AdriaROMS and the Mediterranean Forecasting System general circulation model (MFS model. AREG and AdriaROMS are regional implementations (with some dedicated variations of POM (Blumberg and Mellor, 1987 and ROMS (Shchepetkin and McWilliams, 2005 respectively, while MFS model is based on OPA (Madec et al., 1998 code. The assessment has been done by means of standard scores. The data used for operational systems assessment derive from in-situ and remote sensing measurements. In particular a set of CTDs covering the whole western Adriatic, collected in January 2006, one year of SST from space born sensors and six months of buoy data. This allowed to have a full three-dimensional picture of the operational forecasting systems quality during January 2006 and some preliminary considerations on the temporal fluctuation of scores estimated on surface (or near surface quantities between summer 2005 and summer 2006. In general, the regional models are found to be colder and fresher than observations. They eventually outperform the large scale model in the shallowest locations, as expected. Results on amplitude and phase errors are also much better in locations shallower than 50 m, while degraded in deeper locations, where the models tend to have a higher homogeneity along the vertical column compared to observations. In a basin-wide overview, the two regional models show some dissimilarities in the local displacement of errors, something suggested by the full three-dimensional picture depicted using CTDs, but also confirmed by the comparison with SSTs. In locations where the regional models are mutually correlated, the aggregated mean

  2. Border Dispute in the Adriatic Sea between Croatia and Slovenia

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    Sandra Fabijaniæ GAGRO

    2013-11-01

    Full Text Available This Article represents an overview of long-running border dispute between two neighboring states – Republic of Croatia and Republic of Slovenia in the maritime area of the Northern Adriatic. Despite more than two decades of unsuccessful efforts, including several documents controversial on one or both sides, there are still some disputable points waiting for the final settlement. It is expected to be reached by the Arbitration Tribunal established by the Arbitration Agreement between Croatia and Slovenia, signed in 2009. Without any doubt, this Agreement represents a step forward in their mutual efforts toward peaceful solution, but also contains few open questions to be resolved by the Arbitration Tribunal. In this Article the author presents brief overview of long-time efforts that led to the conclusion of the Arbitration Agreement, as well as the main components that has to be considered – strong political demands in relation to preserve territorial integrities of both states and – at the end – to accomplish a peaceful solution in accordance to the rules of international law.

  3. Decapod crustaceans associated with an artificial reef (Adriatic Sea

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    A. SANTELLI

    2013-07-01

    Full Text Available The aim of this study is to increase the knowledge on the distribution of decapod crustaceans associated with an artificial reef positioned on sandy-mud bottoms in the central Adriatic Sea. The reef is constituted of concrete modules assembled in pyramids and concrete poles. Hard and soft bottom samples were collected from 2001, just after reef construction, to 2005 (4 surveys per year. Regarding the soft seabed, three sites close to a pyramid, three inside the reef area at a distance of 10-15 m from the structures, and three 200 m outside the reef (control sites were randomly sampled during each survey. At the same time, three pyramids (vertical and horizontal walls and three poles were also investigated. After taxonomical analysis, decapod crustaceans were analysed using abundance and species richness. Sites and years were compared using a balanced, fixed effect, 2-way ANOVA and PERMANOVA. In addition, SIMPER analysis was performed to identify those species typifying each community inhabiting both the soft bottom and the artificial substrates. The results showed that the artificial reef induced an increase in both abundance and diversity of the decapods of the natural habitat. In fact, man-made substrates may offer new available space for biological colonization and allow the settlement of new species usually living on hard bottoms, thus increasing the complexity of the original benthic communities.

  4. COMPETITION BETWEEN CONTAINER PORTS IN THE NORTHERN ADRIATIC

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    Elen Twrdy

    2014-12-01

    Full Text Available World trade has changed in the last decade such that container traffic flows are oriented towards more parts of the European continent. The European container port system is not a homogeneous set of ports; instead it consists of several big ports (e.g., Rotterdam, Hamburg, Algeciras... and a large number of medium and small ports. Northern Adriatic (NA ports, namely Rijeka, Koper, Trieste, Venice and Ravenna, are small ports. Each of these ports have different development plans but in varying degrees common hinterlands and costumers. As these ports are located very close one to another, they have to cooperate, but at same time they are competing for their market share. Based on the literature related to port competition and port selection we have analysed the throughput in NA ports for the last twenty four years, and in accordance with this, we have prepared a model for expected growth of container throughput in this region. The resulting model of port dynamics includes three characteristics of container throughput: relative growth, market share and container shift. Furthermore, to obtain some insight into cooperation/competition between the NA ports we have set up a simple dynamic model in which we selected ports’ market share fractions for each port as a dynamic variable.

  5. Long-term climate variability of the Adriatic Sea thermohaline properties using an ensemble of regional ocean hindcast simulations

    Science.gov (United States)

    Dunic, Natalija; Vilibic, Ivica; Sepic, Jadranka; Sevault, Florence; Somot, Samuel; Waldman, Robin; Jorda, Gabriel

    2016-04-01

    The Adriatic Sea has a substantial impact on dynamical properties and thermohaline circulation of the Eastern Mediterranean, through a large freshwater input and dense water formation processes that drive the thermohaline circulation of the Adriatic-Ionian basin. Together with Bimodal Adriatic-Ionian Oscillation (BiOS), it represents the major driving process of interannual and decadal variations in thermohaline properties of the Adriatic Sea and Central/Eastern Mediterranean. Recent findings, extracted from the long-term observations, implicate a change in driving Adriatic climate processes, which might be important for future climate of the whole Eastern Mediterranean. The reproduction of these processes may be challenging for climate models, as occurring over limited areas and over daily timescales at the most. For that reason, an ensemble of NEMOMED regional ocean hindcast simulations with different spatial (10 and 6 km) and vertical (43 and 75 z-levels) resolutions, atmosphere (50 and 12 km resolution) and freshwater (from 8 to 43 river mouths in the basin) forcing have been analyzed, focusing on their representativeness for the Adriatic Sea dynamics. Furthermore, new Adriatic river climatology, developed recently within short-term oceanographic studies, has been imposed to the hindcast simulations with an aim to lower model biases. Half-centurial time series of temperature and salinity collected at the Palagruža Sill transect, and at the Jabuka and South Adriatic Pits known to be collectors of the Adriatic dense waters, were used for verification of models. The analyses focused on the reproduction of the Adriatic interannual and decadal variations, including their governing processes, dense water formation and BiOS for the 1980-2012 time period. Once becoming reliably reproduced, it will allow for an assessment of their importance and changes in future climate.

  6. The Social Context of the Chinese Food System: An Ethnographic Study of the Beijing Seafood Market

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    Michael Fabinyi

    2016-03-01

    Full Text Available China’s role in the global food system has expanded immensely in recent years. In the seafood sector, it is now the largest consumer of seafood products in the world, making the Chinese market highly significant for global fisheries. Drawing on ethnographic- and interview-based research in the largest seafood market in Beijing, this paper analyzes the social context of Chinese consumption and trade. We broadly conceive of this social context as encompassing a range of social norms and practices that include culturally and historically generated consumer preferences, and distinctive forms of governance and business practice. We find that the social context of China is a key driver of patterns of consumption and trade, and provides challenges and opportunities to improve governance for environmental sustainability. We highlight the need for greater policy and academic attention to these characteristics of seafood consumption and trade within China.

  7. Operability Guidelines For Product Tanker In Heavy Weather In The Adriatic Sea

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    Mudronja Luka

    2014-06-01

    Full Text Available This paper presents operability guidelines for seafarers on a product tanker which navigates in the Adriatic Sea during heavy weather. Tanker route starts from the Otranto strait in the south to the island Krk in the north of Adriatic Sea. Heavy weather is caused by south wind called jugo (blowing from E-SE to SS-E, sirocco family. Operability guidelines are given based on an operability criteria platform for presenting ship seakeeping characteristics. Operability criteria considered in this paper are propeller emergence, deck wetness and bow acceleration of a product tanker. Limiting values of mentioned criteria determine sustainable speed. Heavy weather is described by extreme sea state of 7.5 m wave height. Wave spectrum used in this paper is Tabain spectrum which is developed specifically for Adriatic Sea. Seafarer's approach of decisions making in extreme weather is also shown and servers as a guideline for further research of the authors.

  8. The development and implementation of a real-time meteotsunami warning network for the Adriatic Sea

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    J. Šepić

    2011-01-01

    Full Text Available The Adriatic Sea meteotsunami research and warning network is described. The network is located in the middle Adriatic, an area where the most destructive of the Adriatic meteotsunamis (destructive tsunami-like sea level oscillations generated by air pressure oscillations occur. The network consists of three microbarograph meteorological stations, and is supplemented by four permanent tide-gauge stations. The two strongest air pressure disturbances, detected in almost a year and a half of measurements, are examined in more detail and used to test functionality and applicability of the network. Both of these disturbances had a meteotsunami favourable velocity, however, only one generated a meteotsunami. It is discussed why this happened and additional information on creating a meteotsunami warning system are obtained. Methods to construct a simple low-cost meteotsunami warning network are given.

  9. Incidence and prevalence of Vibrio parahaemolyticus in seafood: a systematic review and meta-analysis

    OpenAIRE

    Olumide A. Odeyemi

    2016-01-01

    Vibrio parahaemolyticus is an important seafood borne human pathogen worldwide due to it occurrence, prevalence and ability to cause gastrointestinal infections. This current study aim at investigating the incidence and prevalence of V. parahaemolyticus in seafood using systematic review-meta-analysis by exploring heterogeneity among primary studies. A comprehensive systematic review and meta-analysis of peer reviewed primary studies reported between 2003 and 2015 for the occurrence and preva...

  10. Effects of Food Safety Standards on Seafood Exports to US, EU and Japan

    OpenAIRE

    Van Nguyen, Anh Thi; Wilson, Norbert L.W.

    2009-01-01

    Estimating the panel gravity model with bilateral pair and country-by-time fixed-effects separately for each seafood product, we found that food safety regulations have differential effects across seafood products. In all three industrialized markets, shrimp is most sensitive, while fish is the least sensitive to changing food safety policies. The enforcement of the US HACCP, the EU Minimum Required Performance Level and the Japanese Food Safety Basic Law caused a loss of 90.45%, 99.47%, and ...

  11. Two patients with ciguatera toxicity: a seafood poisoning in travellers to (sub) tropical areas.

    Science.gov (United States)

    Slobbe, L; van Genderen, P J J; Wismans, P J

    2008-10-01

    Ciguatera toxicity is a type of seafood poisoning caused by the consumption of ciguatoxic reef fish. We describe two patients with characteristic gastrointestinal and neurological symptoms, both of whom had eaten local seafood. Although mortality is low, morbidity can be considerable due to debilitating symptoms. Most cases originate in the (sub)tropics but due to expanding tourism and fish exportation, it may be encountered in more temperate regions. Treatment is supportive, but some benefit from intravenous mannitol has been reported.

  12. Evaluation and identification of histamine-forming bacteria on fish products of middle Adriatic Sea

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    Claudia Costanza

    2013-04-01

    Full Text Available Regulation EU 2073/2005 sets maximum concentration for histamine in fish and products thereof. To meet these criteria, manufacturers have to define performance objectives, such as the maximum allowed prevalence and number/activity of histamine-producing bacteria at relevant stage of production. In order to assess the presence and decarboxylase activity of contaminant bacteria we examined 51 samples of blue fish caught and processed in Emilia Romagna region. We collected 50 gr of fish (skin and gills or the entire product from 10 sample units from every lot. Analytical samples were cultured in Trypticase Soy Broth supplemented with histidine and pyridoxal HCl. Histamine was measured with an electrochemical biosensor after incubation at both 37°C for 24 h and 18-22°C for 48 h. Enrichments that showed relevant enzymatic activity were seeded on Niven agar to isolate suspected colonies and DNA extracts from these bacteria were analyzed by polymerase chain reaction (PCR for detecting specific sequences of the gene encoding pyridoxaldependent histidine decarboxylase (HDC. Overall, 29.4% samples showed relevant production of histamine in broth cultures (above a cut-off value set at 250 ng/mL and 53.3% of them (8 out of 15 samples allowed detection of HDC positive strains. All of them were typed as Morganella, which appears to be the most common of fish caught in middle Adriatic sea. Ten out of the twelve positive samples with enrichment cultures incubated at both 37 and 18-22°C (83% showed higher decarboxylase activity at room temperature, suggesting the presence of psychrotolerant strains. In addition, the prevalence of histamine-producing bacteria was higher at retail than at production level, probably as a consequence of manipulations and cross-contamination. The risk correlated to development of histamine-producing psychrotolerans bacteria cannot be controlled only with storage temperature: it is necessary for the food business operators to

  13. Readily Available Sources of Long-Chain Omega-3 Oils: Is Farmed Australian Seafood a Better Source of the Good Oil than Wild-Caught Seafood?

    OpenAIRE

    Peter D Nichols; Brett Glencross; Petrie, James R.; Surinder P. Singh

    2014-01-01

    Seafood consumption enhances intake of omega-3 long-chain (≥C20) polyunsaturated fatty acids (termed LC omega-3 oils). Humans biosynthesize only small amounts of LC-omega-3, so they are considered semi-essential nutrients in our diet. Concern has been raised that farmed fish now contain lower LC omega-3 content than wild-harvested seafood due to the use of oil blending in diets fed to farmed fish. However, we observed that two major Australian farmed finfish species, Atlantic salmon (Salmo ...

  14. Determination of four paraben-type preservatives and three benzophenone-type ultraviolet light filters in seafoods by LC-QqLIT-MS/MS.

    Science.gov (United States)

    Han, Chao; Xia, Biqi; Chen, Xiangzhun; Shen, Jincan; Miao, Qian; Shen, Yan

    2016-03-01

    For the first time, an efficient and sensitive analytical method based on liquid chromatography-quadrupole linear ion trap-tandem mass spectrometry (LC-QqLIT-MS/MS) was developed for the simultaneous determination of four paraben-type preservatives and three benzophenone-type ultraviolet light filters in both plant (Sargassum fusiforme, porphyra, kelp) and animal (hairtail, yellow croaker, shrimp) seafood. The samples were extracted in methanol by pressurized liquid extraction (PLE), and the extracts were then cleaned up by mixed-mode cationic exchange (MCX) solid-phase extraction cartridges. Both isotope-labeled internal standards and matrix-matched calibration standards were used to alleviate and correct for the matrix effects, and the limits of quantification (LOQs) were 10.0μg kg(-1) for all target compounds. The average recoveries were in the range of 80.6-107.8% at three spiked concentration levels (10, 50 and 100μgkg(-1)) with relative standard deviations (RSDs) below 8.5%. The results suggest that very limited contamination of these seven emerging contaminants, mainly associated with PCPs, occurred in these common seafoods.

  15. The Adriatic – Contemporary Geographic Issues, Zadar, September 10-12, 2009

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    Branimir Vukosav

    2009-12-01

    Full Text Available From September 10 to 12, the Department of Geography of the University of Zadar and the Croatian Geographical Society – Zadar organized a scientific conference as a part of the Department's 15th anniversary celebration. Another important anniversary 20 years of the Croatian Geographic Society Zadar was also celebrated at the conference named The Adriatic – Contemporary Geographic Issues. About 50 Croatian and foreign geographers, as well as other scientists concerned with spatial issues participated in the conference. During the two-day program, a variety of interesting subjects were presented and discussed, mostly related to issues related to the broader Adriatic area.

  16. Spatial planning for fisheries in the Northern Adriatic: working toward viable and sustainable fishing

    DEFF Research Database (Denmark)

    Bastardie, Francois; Angelini, Silvia; Bolognini, Luca

    2017-01-01

    Given the great overfishing of the demersal resources in the Northern Adriatic Sea (geographical sub-area [GSA] 17), along with the fishing pressure in marine habitats, evidence strongly supports the need to evaluate appropriate management approaches. Several fishing activities operate simultaneo......Given the great overfishing of the demersal resources in the Northern Adriatic Sea (geographical sub-area [GSA] 17), along with the fishing pressure in marine habitats, evidence strongly supports the need to evaluate appropriate management approaches. Several fishing activities operate...

  17. Occurrence of potential pathogenic Aeromonas species in tropical seafood, aquafarms and mangroves off Cochin coast in South India

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    Alphonsa Vijaya Joseph

    2013-12-01

    Full Text Available Background: The genus Aeromonas include gram-negative, motile, facultative anaerobic, rod shaped and oxidase positive bacteria comprising several species, associated with the aquatic environment. Aeromonas species have been implicated in human pathogenesis and are linked with gastroenteritis, muscle infections, septicemia, and skin diseases. In fish they are renowned as enteric pathogens causing haemorrhagic septicemia, fin rot, soft tissue rot and furunculosis resulting in major die-offs and fish kills. Aim: This study reports the occurrence of potential pathogenic Aeromonas sp. in tropical seafood (Squids, Prawns and Mussels, aquafarms and mangroves of Cochin, Kerala, South India. Materials and Methods :Tropical seafood (Squid, Prawn and Mussel, sediment and water samples from aquafarms and associated mangroves were screened for Aeromonas contamination. The isolates were identified by 16S rDNA sequence analysis and subjected to morphological and biochemical characterization. Haemolytic assay was used for determining pathogenicity of the organisms. Antibiotic susceptibility against 12 antibiotics were performed and the MAR index was calculated. Results: A total of 134 isolates were recovered from the samples of which 15 were identified as Aeromonas species by 16S rDNA sequence analysis and were assigned to 5 species namely, A. hydrophila, A. enteropelogenes, A. caviae, A. punctataand A. aquarorium. Morphological, biochemical and phylogenetic analyses revealed relatedness and variability among the strains. All the isolates were haemolytic on blood agar indicating their pathogenicity. The isolates exhibited varying degrees of resistance to vancomycin (86.66%, ampicillin (46.66%, nalidixic acid (20%, tetracycline (6.66%, co-trimaxozole (6.66% and rifampicin (6.66% and were susceptible to antibiotics like gentamycin, streptomycin, trimethoprim, azithromycin, cefixime and chloramphenicol. 20% of Aeromonas sp. showed MAR index > 0.2 indicative of the

  18. Volatile compounds of some popular Mediterranean seafood species

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    I. GIOGIOS

    2013-07-01

    Full Text Available The volatile compounds of highly commercialised fresh Mediterranean seafood species, including seven fish (sand-smelt Atherina boyeri, picarel Spicara smaris, hake Merluccius merluccius, pilchard Sardina pilchardus, bogue Boobps boops, anchovy Engraulis encrasicolus and striped-mullet Mullus barbatus, squid (Loligo vulgaris, shrimp (Parapenaeus longirostris and mussel (Mytilus galloprovincialis, were evaluated by simultaneous steam distillation-extraction and subsequent GC-MS analysis. A total of 298 volatile compounds were detected. The mussels contained the highest total concentration of volatile compounds, while pilchard among fish species contained the highest number and concentrations of volatile compounds. Individual patterns of volatile compounds have been distinguished. The fish species when compared to the shellfish species studied, contained 6 to 30 times more 1-penten-3-ol, higher quantities of 2-ethylfuran, and 2,3-pentanedione, which was absent from the shellfish species. Pilchard is characterized by a high concentration of alcohols, shrimps by the high presence of amines and S-compounds, while mussels by high amounts of aldehydes, furans, and N-containing compounds (pyridine, pyrazines and pyrrols. The fatty acid-originating carbonyl compounds in fish seem to be related to the species’ fat content.

  19. Total synthesis of a chlorosulpholipid cytotoxin associated with seafood poisoning.

    Science.gov (United States)

    Nilewski, Christian; Geisser, Roger W; Carreira, Erick M

    2009-01-29

    Each year, there are many cases of seafood poisoning in humans worldwide. Among the various toxins isolated that contribute to these poisonings, the chlorosulpholipids are particularly intriguing because of their structural and stereochemical complexity. The mechanism of biological activity remains unknown and, although chlorosulpholipids are associated with membranes in the organisms from which they are isolated, little is understood about their role within biological membranes. The lack of availability of the natural products has impaired more in-depth biochemical studies. So far, none of the chlorosulpholipids have been obtained from total synthesis, and efficient routes to their synthesis would be desirable for the preparation of material for pharmacological characterization and proper evaluation of the risk to human health. Despite the notable advances in the science of organic synthesis, reliable methods for stereoselective construction of polychlorinated acyclic substrates are lacking, although some preliminary investigations have appeared. Here we report the synthesis of a chlorosulpholipid cytotoxin, leading to confirmation of the proposed structure and the discovery of unanticipated reactivity of polychlorinated hydrocarbons. The concise synthetic approach should enable the preparation of material in sufficient quantities to facilitate biological studies.

  20. An Investigation of Biodiesel Production from Wastes of Seafood Restaurants

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    Nour Sh. El-Gendy

    2014-01-01

    Full Text Available This work illustrates a comparative study on the applicability of the basic heterogeneous calcium oxide catalyst prepared from waste mollusks and crabs shells (MS and CS, resp. in the transesterification of waste cooking oil collected from seafood restaurants with methanol for production of biodiesel. Response surface methodology RSM based on D-optimal deign of experiments was employed to study the significance and interactive effect of methanol to oil M : O molar ratio, catalyst concentration, reaction time, and mixing rate on biodiesel yield. Second-order quadratic model equations were obtained describing the interrelationships between dependent and independent variables to maximize the response variable (biodiesel yield and the validity of the predicted models were confirmed. The activity of the produced green catalysts was better than that of chemical CaO and immobilized enzyme Novozym 435. Fuel properties of the produced biodiesel were measured and compared with those of Egyptian petro-diesel and international biodiesel standards. The biodiesel produced using MS-CaO recorded higher quality than that produced using CS-CaO. The overall biodiesel characteristics were acceptable, encouraging application of CaO prepared from waste MS and CS for production of biodiesel as an efficient, environmentally friendly, sustainable, and low cost heterogeneous catalyst.

  1. Incidence and toxigenicity of Aeromonas hydrophila in seafood.

    Science.gov (United States)

    Tsai, G J; Chen, T H

    1996-08-01

    Three selective media, Oxoid Aeromonas agar (OA), blood ampicillin agar (BA) and starch ampicillin agar (SA) were used to evaluate the presence of Aeromonas hydrophila in 66 samples of oyster, shrimp, fish and surimi products. Oyster had the highest incidence, with 50% positive, whilst no A. hydrophila was found in the surimi. Of the three selective media, BA displayed the highest recovery rate of A. hydrophila from seafood. Forty-eight isolates from this survey were tested for their capability to produce hemolysin and cytotoxin. Hemolysin was produced by 79.2% of the isolates and cytotoxin was produced by 91.7% of the isolates in brain heart infusion broth. One of the toxin-producing isolates from oyster, strain 8-169, was further tested for growth and toxin production in oyster, shrimp and fish at various temperatures. This particular isolate grew best and had highest toxin production in oyster. Hemolysin and cytotoxin were produced earlier at 28 degrees C than at 37 degrees C, and titers of hemolysin were also higher at 28 degrees C. At 5 degrees C, it was able to grow and produce hemolysin in oyster.

  2. Towards Safer Seafood: What Indonesian Law Should “Say” about Mercury-Contaminated Fish

    Directory of Open Access Journals (Sweden)

    Margaretha Quina

    2016-08-01

    Full Text Available Fish is a popular culinary dish in Indonesian culture and a major economic resource on which many people depend their livelihood. However, with severe pollution in Indonesian water, including uncontrolled mercury pollution which persists in the food chain and eventually gets into humans’ body as the top predator, fish safety is particularly worrying – especially taking into account the frequency of average Indonesians’ consumption of fish. In various jurisdictions, the management tool used by lawmakers and regulators with regard to this issue is information disclosure, or known as “fish advisory warning,” to cover the failure of command and control. This paper analyses whether Indonesian laws have provided the mandate or authority to issue fish advisory warning under Fishery Law, Food Law, Environmental Protection and Management Law, and Public Information Disclosure Law. It concluded that Indonesian law implies a statutory mandate for the government to issue fish advisory warning, at least in a situation involving the threat to general life – not specifically through the Fishery Law, Food Law, or EPML, but through PIDL’s immediate information mandate.  

  3. PCBs contamination in seafood species at the Eastern Coast of Thailand.

    NARCIS (Netherlands)

    Jaikanlaya, C.; Settachan, D.; Denison, M.; Ruchirawat, M.; van den Berg, M.

    2009-01-01

    Polychlorinated biphenyls (PCBs) are a large group of persistent organic substances spread throughout the world. The most toxic PCBs are those that are dioxin-like (dl-PCBs). Environmental studies on PCBs in Thailand are limited, especially with regards to dl-PCBs. This study is one of the first in

  4. Occupational allergies in the seafood industry--a comparative study of Australian and South African workplaces.

    Science.gov (United States)

    Lopata, A L; Baatjies, R; Thrower, S J; Jeebhay, M F

    2004-01-01

    Although seafood allergy due to ingestion is commonly observed in clinical practice, the incidence of seafood allergies in general and more specifically in the occupational setting in Australia is largely unknown. The work practices, occupational health services and allergic health problems in 140 seafood processing workplaces in Australia were examined and compared to previous studies in South Africa. A cross-sectional employer-based survey design was used to conduct the study in both countries. In the South African study a response rate of 60% (n = 41) was obtained, compared to a response rate of 18% (n = 140) in Australia. The most common seafood processed by workplaces in South Africa was finfish (76%) and rock lobster (34%). Similarly in Australia, finfish (34%) was the most frequently handled seafood. However, processing of prawns (24%) and oysters (21%) was more common in Australia. Common work processes in South Africa involved freezing (71%), cutting/filleting (63%) and degutting (58%) procedures. Similar processes were followed in Australian industries with the exception of shucking of oysters, particularly common in the aquaculture industries. About half of the workplaces in both countries provided an occupational health service and medical surveillance of workers. However, none of the workplaces in South Africa and only 9% of the workplaces in Australia had industrial hygiene programs for seafood aerosols in place. In both countries positive trends were observed between the size of the workforce and the provision of occupational health services (poccupational health related effects among exposed workers has previously not been investigated in detail and merits further study. It is recommended that further epidemiological studies focus on seafood exposure in Australia and identify specific risk factors for sensitisation.

  5. Metallothioneins and heat shock proteins 70 in marine mussels as sensors of environmental pollution in Northern Adriatic Sea.

    Science.gov (United States)

    Mićović, Vladimir; Bulog, Aleksandar; Kučić, Natalia; Jakovac, Hrvoje; Radošević-Stašić, Biserka

    2009-11-01

    In an attempt to assess the intensity of environmental pollution in industrial zones of Kvarnerian Bay in Northern Adriatic Sea and the reactivity of Mytilus galloprovincialis to these changes, in this study we estimated the concentration of heavy metals at four locations in both sea-sediment and in the mussels. Further we tried to correlate these changes with seasonal variations in environmental temperature, pH and salinity, as well as with the expression of metallothioneins (MTs) and heat shock proteins (HSPs) in the digestive tract of the mussels. Sampling in vivo was performed monthly, during the year 2008, while under the laboratory conditions the reactivity of acclimated mussels were tested to increasing concentrations of CdCl(2) and to thermal stress. The data have shown that the induction of MTs and HSP isoforms of the 70-kDa size class were highly affected by model agents treatment including contamination of sea-sediment by Pb, Hg and Cd, implying that these stress proteins might be power biomarkers of marine pollution.

  6. Distribution and morphological abnormalities of recent foraminifera in the Marano and Grado Lagoon (North Adriatic Sea, Italy

    Directory of Open Access Journals (Sweden)

    R. MELIS

    2013-07-01

    Full Text Available The Marano and Grado Lagoon, is a northern Adriatic wetland system of relevant naturalistic and economic value, that is constantly under quality control in accordance with the current environmental directives. Benthic foraminifers community with its morphological abnormalities were investigated in the recent sediments (about 10 years old of 21 stations collected in the framework of the “MIRACLE” Project which aimed at testing the coexistence of clam farming with high Hg contamination. Euryhaline foraminifers, well known in Mediterranean brackish-waters, mainly characterizes the total assemblage. A. tepida dominates in areas characterized by low salinity, high clay and Corg content, but also to anthropogenic pressure. E. gunteri and H. germanica are recorded in the western sector of the lagoon, which is more affected by salinity variations and agricultural activities. Slightly higher values of assemblage diversity appear in less restricted areas of the lagoon or, at least, where physical parameters such as temperature and salinity are less variable. The test abnormalities, carried out on total assemblage, shows that the FAI (Foraminiferal Abnormality Index values always exceed 1% of the total assemblage, with clear decreasing gradients from inland to the sea (from N to S and from W to E in the studied area.

  7. Tracking Bottom Waters in the Southern Adriatic Sea Applying Seismic Oceanography Techniques

    Science.gov (United States)

    2011-10-05

    Sciences Serie II 306, 781-787 (in French with English abstract). Hobbs. R.W- et al.. 2007. CO—Geophysical Oceanography: A New Tool to Under...Langone. L, Miserocchi, S.. Tesi . T., Foglini. F.. 2007. Particle transport in the Bari Canyon (Southern Adriatic Sea). Marine Geology 246(2-4

  8. Observed and simulated trophic index (TRIX) values for the Adriatic Sea basin

    Science.gov (United States)

    Fiori, Emanuela; Zavatarelli, Marco; Pinardi, Nadia; Mazziotti, Cristina; Ferrari, Carla Rita

    2016-09-01

    The main scope of the Marine Strategy Framework Directive is to achieve good environmental status (GES) of the EU's marine waters by 2020, in order to protect the marine environment more effectively. The trophic index (TRIX) was developed by Vollenweider in 1998 for the coastal area of Emilia-Romagna (northern Adriatic Sea) and was used by the Italian legislation to characterize the trophic state of coastal waters. We compared the TRIX index calculated from in situ data ("in situ TRIX") with the corresponding index simulated with a coupled physics and biogeochemical numerical model ("model TRIX") implemented in the overall Adriatic Sea. The comparison between in situ and simulated data was carried out for a data time series on the Emilia-Romagna coastal strip. This study shows the compatibility of the model with the in situ TRIX and the importance of the length of the time series in order to get robust index estimates. The model TRIX is finally calculated for the whole Adriatic Sea, showing trophic index differences across the Adriatic coastal areas.

  9. Gelatinous zooplankton assemblages in temperate coastal waters - seasonal variations (Gulf of Trieste, Adriatic Sea):

    OpenAIRE

    Malej, Alenka; Miloš, Čarna

    2005-01-01

    Gelatinous plankton composition, abundance, biomass and their seasonality was studied in the Gulf of Trieste (Adriatic Sea) over a yearly cycle. The most diversive gelatinous groups were Hydromedusae with 14 species, followed by Siphonophora (six species), Appendicularia (five species), Chaetognatha (two species), and Thaliacea (one species)....

  10. Polycyclic aromatic hydrocarbons and halogenated persistent organic pollutants in canned fish and seafood products: smoked versus non-smoked products.

    Science.gov (United States)

    Drabova, Lucie; Pulkrabova, Jana; Kalachova, Kamila; Tomaniova, Monika; Kocourek, Vladimir; Hajslova, Jana

    2013-01-01

    In this study, levels of several groups of environmental contaminants represented by PAHs, PCBs, organochlorine pesticides and polybrominated diphenyl ethers were determined in various types of canned smoked and non-smoked fish and seafood products (54 samples) obtained from the Czech market. PAHs were detected in all of the studied samples, and at least one of the target halogenated persistent organic pollutants was present above the LOQ in 85% of the samples. The levels of PAHs, PCBs, organochlorine pesticides (mainly DDTs) and polybrominated diphenyl ethers found in the canned products varied in the range of 1.4-116 µg kg(-1), 0.6-59.6 µg kg(-1), 0.6-82.7 µg kg(-1) and 0.1-2.1 µg kg(-1) can content, respectively. Smoked sprats were the most contaminated fish product (n = 12) in which the highest levels of both PAHs and persistent organic pollutants were found. In 67% of the samples of smoked sprats in oil, the level of benzo[a]pyrene exceeded the maximum level of 5 µg kg(-1) established for smoked fish by European Union legislation. The distribution of target analytes between oil and fish fractions was also assessed. Significantly higher levels of PAHs were measured in the oil fraction.

  11. Fukushima radionuclides in the NW Pacific, and assessment of doses for Japanese and world population from ingestion of seafood

    Science.gov (United States)

    Povinec, Pavel P.; Hirose, Katsumi

    2015-03-01

    Variations of Fukushima-derived radionuclides (90Sr, 134Cs and 137Cs) in seawater and biota offshore Fukushima and in the NW Pacific Ocean were investigated and radiation doses to the Japanese and world population from ingestion of seafood contaminated by Fukushima radionuclides were estimated and compared with those from other sources of anthropogenic and natural radionuclides. The total effective dose commitment from ingestion of radionuclides in fish, shellfish and seaweed caught in coastal waters off Fukushima was estimated to be 0.6 +/- 0.4 mSv/y. The individual effective dose commitment from consumption of radioactive-contaminated fish caught in the open Pacific Ocean was estimated to be 0.07 +/- 0.05 mSv/y. These doses are comparable or much lower than doses delivered from the consumption of natural 210Po in fish and in shellfish (0.7 mSv/y). The estimated individual doses have been below the levels when any health damage of the Japanese and world population could be expected.

  12. Activity concentrations of (137)Caesium and (210)Polonium in seafood from fishing regions of New Zealand and the dose assessment for seafood consumers.

    Science.gov (United States)

    Pearson, Andrew J; Gaw, Sally; Hermanspahn, Nikolaus; Glover, Chris N

    2016-01-01

    A study was undertaken to determine activity concentrations for (134)Caesium, (137)Caesium and (210)Polonium in New Zealand seafood, and establish if activity concentrations varied with respect to species/ecological niche and coastal region. Thirty seafood samples were obtained from six fishing regions of New Zealand along with a further six samples of two commercially important species (hoki and arrow squid) with well-defined fisheries. (134)Caesium was not detected in any sample. (137)Caesium was detected in 47% of samples, predominantly in pelagic fish species, with most activities at a trace level. Detections of (137)Caesium were evenly distributed across all regions. Activity concentrations were consistent with those expected from the oceanic inventory representing residual fallout from global nuclear testing. (210)Polonium was detected above the minimum detectable concentration in 33 (92%) of the analysed samples. Molluscs displayed significantly elevated activity concentrations relative to all other species groups. No significant regional variation in activity concentrations were determined. Two dose assessment models for high seafood consumers were undertaken. Dose contribution from (137)Caesium was minimal and far below the dose exemption limit of 1 mSv/year. Exposure to (210)Polonium was significant in high seafood consumers at 0.44-0.77 mSv/year (5th-95th percentile). (137)Caesium is concluded to be a valuable sentinel radionuclide for monitoring anthropogenic releases, such as global fallout and reactor releases, in the marine environment. (210)Polonium is of importance as a natural radionuclide sentinel due to its high contribution to dietary committed dose in seafood consumers.

  13. Dietary exposure to perfluoroalkyl acids of specific French adult sub-populations: high seafood consumers, high freshwater fish consumers and pregnant women.

    Science.gov (United States)

    Yamada, A; Bemrah, N; Veyrand, B; Pollono, C; Merlo, M; Desvignes, V; Sirot, V; Marchand, P; Berrebi, A; Cariou, R; Antignac, J P; Le Bizec, B; Leblanc, J C

    2014-09-01

    Perfluoroalkyl acids (PFAAs) are globally found in various media, including food and especially fishery products. In the present study, the dietary exposure to 15 perfluoroalkyl acids was assessed for 3 French adult populations, namely high seafood consumers, high freshwater fish consumers, and pregnant women. Purified food extracts were analysed by LC-MS/MS and PFBA, PFPA, PFHxA, PFHpA, PFOA, PFNA, PFDA, PFUnA, PFTrDA, PFTeDA, PFBS, PFHxS, PFHpS, PFOS and PFDS were monitored and quantified according to the isotope dilution principle. Under lower bound (LB) hypothesis (i.e. contamination valuesseafood consumers appear as the most exposed to PFOA (1.2 ng.kg(-1) bw.d(-1)), PFNA (0.2 ng.kg(-1) bw.d(-1)) and PFHxS (0.06 ng.kg(-1) bw.d(-1)). For all considered populations, the major exposure contributors are fish, seafood and water under LB hypothesis, while dairy products, bread and crispbread are the main contributors under upper bound (UB) hypothesis. Besides this food exposure assessment, further studies are needed to assess the more global PFAA exposure, taking into account indoor and outdoor air, dust and cutaneous contact, which could be other important contributors for this particular class of chemicals.

  14. Essential and toxic element concentrations in blood and urine and their associations with diet: results from a Norwegian population study including high-consumers of seafood and game.

    Science.gov (United States)

    Birgisdottir, B E; Knutsen, H K; Haugen, M; Gjelstad, I M; Jenssen, M T S; Ellingsen, D G; Thomassen, Y; Alexander, J; Meltzer, H M; Brantsæter, A L

    2013-10-01

    The first aim of the study was to evaluate calculated dietary intake and concentrations measured in blood or urine of essential and toxic elements in relation to nutritional and toxicological reference values. The second aim was to identify patterns of the element concentrations in blood and urine and to identify possible dietary determinants of the concentrations of these elements. Adults with a known high consumption of environmental contaminants (n=111), and a random sample of controls (n=76) answered a validated food frequency questionnaire (FFQ). Complete data on biological measures were available for 179 individuals. Blood and urine samples were analyzed for selenium, iodine, arsenic, mercury, cadmium and lead. Principal component analysis was used to identify underlying patterns of correlated blood and urine concentrations. The calculated intakes of selenium, iodine, inorganic arsenic and mercury were within guideline levels. For cadmium 24% of the high consumer group and 8% of the control group had intakes above the tolerable weekly intake. Concentrations of lead in blood exceeded the bench-mark dose lower confidence limits for some participants. However, overall, the examined exposures did not give rise to nutritional or toxicological concerns. Game consumption was associated with lead in blood (B(ln) 0.021; 95%CI:0.010, 0.031) and wine consumption. Seafood consumption was associated with urinary cadmium in non-smokers (B(ln) 0.009; 95%CI:0.003, 0.015). A novel finding was a distinct pattern of positively associated biological markers, comprising iodine, selenium, arsenic and mercury (eigenvalue 3.8), reflecting seafood intake (B 0.007; 95%CI:0.004, 0.010). The study clearly demonstrates the significance of seafood as a source of both essential nutrients and toxic elements simultaneously and shows that exposure to various essential and toxic elements can be intertwined.

  15. Life cycle considerations for improving sustainability assessments in seafood awareness campaigns.

    Science.gov (United States)

    Pelletier, Nathan; Tyedmers, Peter

    2008-11-01

    It is widely accepted that improving the sustainability of seafood production requires efforts to reverse declines in global fisheries due to overfishing and to reduce the impacts to host ecosystems from fishing and aquaculture production technologies. Reflective of on-going dialogue amongst participants in an international research project applying Life Cycle Assessment to better understand and manage global salmon production systems, we argue here that such efforts must also address the wider range of biophysical, ecological, and socioeconomic impacts stemming from the material and energetic throughput associated with these industries. This is of particular relevance given the interconnectivity of global environmental change, ocean health, and the viability of seafood production in both fisheries and aquaculture. Although the growing popularity of numerous ecolabeling, certification, and consumer education programs may be making headway in influencing Western consumer perceptions of the relative sustainability of alternative seafood products, we also posit that the efficacy of these initiatives in furthering sustainability objectives is compromised by the use of incomplete criteria. An emerging body of Life Cycle Assessment research of fisheries and aquaculture provides valuable insights into the biophysical dimensions of environmental performance in alternative seafood production and consumption systems, and should be used to inform a more holistic approach to labeling, certifying, and educating for sustainability in seafood production. More research, however, must be undertaken to develop novel techniques for incorporating other critical dimensions, in particular, socioeconomic considerations, into our sustainability decision-making.

  16. Microplastics in seafood: Benchmark protocol for their extraction and characterization.

    Science.gov (United States)

    Dehaut, Alexandre; Cassone, Anne-Laure; Frère, Laura; Hermabessiere, Ludovic; Himber, Charlotte; Rinnert, Emmanuel; Rivière, Gilles; Lambert, Christophe; Soudant, Philippe; Huvet, Arnaud; Duflos, Guillaume; Paul-Pont, Ika

    2016-08-01

    Pollution of the oceans by microplastics (marine organisms collected in situ. For extraction and characterization of microplastics in biological samples, the crucial step is the identification of solvent(s) or chemical(s) that efficiently dissolve organic matter without degrading plastic polymers for their identification in a time and cost effective way. Most published papers, as well as OSPAR recommendations for the development of a common monitoring protocol for plastic particles in fish and shellfish at the European level, use protocols containing nitric acid to digest the biological tissues, despite reports of polyamide degradation with this chemical. In the present study, six existing approaches were tested and their effects were compared on up to 15 different plastic polymers, as well as their efficiency in digesting biological matrices. Plastic integrity was evaluated through microscopic inspection, weighing, pyrolysis coupled with gas chromatography and mass spectrometry, and Raman spectrometry before and after digestion. Tissues from mussels, crabs and fish were digested before being filtered on glass fibre filters. Digestion efficiency was evaluated through microscopical inspection of the filters and determination of the relative removal of organic matter content after digestion. Five out of the six tested protocols led to significant degradation of plastic particles and/or insufficient tissue digestion. The protocol using a KOH 10% solution and incubation at 60 °C during a 24 h period led to an efficient digestion of biological tissues with no significant degradation on all tested polymers, except for cellulose acetate. This protocol appeared to be the best compromise for extraction and later identification of microplastics in biological samples and should be implemented in further monitoring studies to ensure relevance and comparison of environmental and seafood product quality studies.

  17. Seafood prices reveal impacts of a major ecological disturbance

    Science.gov (United States)

    Smith, Martin D.; Oglend, Atle; Kirkpatrick, A. Justin; Asche, Frank; Bennear, Lori S.; Craig, J. Kevin; Nance, James M.

    2017-01-01

    Coastal hypoxia (dissolved oxygen ≤ 2 mg/L) is a growing problem worldwide that threatens marine ecosystem services, but little is known about economic effects on fisheries. Here, we provide evidence that hypoxia causes economic impacts on a major fishery. Ecological studies of hypoxia and marine fauna suggest multiple mechanisms through which hypoxia can skew a population’s size distribution toward smaller individuals. These mechanisms produce sharp predictions about changes in seafood markets. Hypoxia is hypothesized to decrease the quantity of large shrimp relative to small shrimp and increase the price of large shrimp relative to small shrimp. We test these hypotheses using time series of size-based prices. Naive quantity-based models using treatment/control comparisons in hypoxic and nonhypoxic areas produce null results, but we find strong evidence of the hypothesized effects in the relative prices: Hypoxia increases the relative price of large shrimp compared with small shrimp. The effects of fuel prices provide supporting evidence. Empirical models of fishing effort and bioeconomic simulations explain why quantifying effects of hypoxia on fisheries using quantity data has been inconclusive. Specifically, spatial-dynamic feedbacks across the natural system (the fish stock) and human system (the mobile fishing fleet) confound “treated” and “control” areas. Consequently, analyses of price data, which rely on a market counterfactual, are able to reveal effects of the ecological disturbance that are obscured in quantity data. Our results are an important step toward quantifying the economic value of reduced upstream nutrient loading in the Mississippi Basin and are broadly applicable to other coupled human-natural systems. PMID:28137850

  18. The elements of a consumer-based initiative in contributing to positive environmental change: Monterey Bay Aquarium's Seafood Watch program.

    Science.gov (United States)

    Kemmerly, Jennifer Dianto; Macfarlane, Victoria

    2009-09-01

    Monterey Bay Aquarium launched the Seafood Watch program in 2000. The program's Seafood Watch pocket guide is a simple tool that visitors can use to identify seafood from environmentally responsible sources. Since its inception, more than 2 million pocket guides have been distributed to Monterey Bay Aquarium visitors and 20 million have been distributed through partnerships across the United States. Partner institutions such as aquariums, conservation organizations, and businesses also conduct outreach and are working to influence their local seafood purveyors. An evaluation conducted in 2003 and 2004 assessed the program's strategies for increasing awareness and shifting consumer buying habits as they relate to sustainable seafood, including use of the pocket guide. Visitors who picked up pocket guides were surveyed immediately after their aquarium visit, and again four months later. The evaluation found that most visitors continued to use the guides and had changed their seafood buying habits in several respects. Those interviewed also reported some barriers to using the guides. The elements that appear to be critical to the success of the strategy with respect to changing consumer purchasing habits include: a focused distribution approach; providing credible and specific information on problems and solutions to increase action-related knowledge; providing a trigger or prompt that is available at the time of purchase; and reducing barriers to action, at the point of action, by working with seafood purveyors and the broader sustainable seafood movement to increase knowledge and available options. In response to the evaluation, Seafood Watch has strengthened these elements and expanded to help meet the needs of the broader sustainable seafood movement. A process of strategic planning, evaluation, cooperation among partners, and adaptability to the movement's natural evolution has proven to be critical to the program's success in contributing to the development of a

  19. Turbulence Variability in the Upper Layers of the Southern Adriatic Sea Under a Variety of Atmospheric Forcing Conditions

    Science.gov (United States)

    2012-01-01

    NURC ) Dynamics of the Adriatic in Real •Corresponding author. Tel.: +39 041 2407956. E-mail address: sandro.carnieWismar.cnr.it (S. Carniel). 1 Fax... NURC , and other partners in the southern Adriatic under the DART-06 campaigns. Although each of these campaigns had diverse and multiple focuses...Longitude "E Fig. 1. Station B90 (red circle) was where microstructure observations were made near moorings deployed under the NRL/ NURC DART06B campaign

  20. Long-term variability of the South Adriatic circulation and phytoplankton biomass in relation to large-scale climatic pattern

    OpenAIRE

    L. Shabrang; Menna, M.; C. Pizzi; Lavigne, H.; Civitarese, G.; Gačić, M.

    2015-01-01

    The interannual variability of the South Adriatic Gyre and its relation to the wind vorticity and the large-scale climatic pattern (North Atlantic Oscillation – NAO), was studied using the time-series of satellite altimetry data and ocean surface wind products. The cyclonic circulation observed in the South Adriatic area was mainly sustained by the local wind forcing, as suggested by the positive correlation between the rate of change of the current vorticity and the wind-stres...

  1. Understanding sustainable seafood consumption behavior: an examination of the Ocean Wise (OW initiative in British Columbia

    Directory of Open Access Journals (Sweden)

    Katherine M. Dolmage

    2016-06-01

    Full Text Available Sustainable seafood labeling programs have been developed as one of several efforts to address the current dire trends in fish stocks. The Ocean Wise (OW program, started at the Vancouver Aquarium (Canada, works with restaurateurs and suppliers to simplify sustainable purchasing decisions. By aiding restaurateurs with responsible purchasing, OW hopes to shift demand to sustainable seafood products. OW has grown in numbers and spread across Canada quickly; we examine the factors associated with individual and organizational decisions to participate in the program, including personal, business, and program-related factors. These factors were examined in relation to OW membership by Vancouver restaurateurs. Results show that restaurateurs with greater knowledge of seafood issues and restaurants with greater commitment to a range of green initiatives are more likely to participate in the OW program. By focusing efforts on education and incorporating a range of green values into marketing, OW can maximize their limited resources to grow membership.

  2. Determination of Content of Hydrargyrum in Seafood by Diphenyl Thiocarbazone Method%双硫腙比色法测定海鱼中的汞含量

    Institute of Scientific and Technical Information of China (English)

    张铁涛; 周宁海

    2012-01-01

    Determination of the content of Hydrargyrum in Seafood by Diphenyl thioearbazone method. Food safety assessment according to NY5073 -2006. Studies have shown that water quality in the region at low risk of hydrargyrum contamination. The level of hydrargyrum of the fish head slightly higher than others. The tuna higher than the sea pomfret. To provide pollution of heavy metal in seafood and a theoretical basis for food safety.%采用双硫腙比色法测定三亚红沙海域金枪鱼、海鲳鱼中重金属汞的含量,根据NY5073-2006进行食用安全性评估。样本分析表明,三亚红沙海域水质汞污染在低风险范围内,鱼头汞含量略高于鱼尾、鱼肉,肉食性鱼体(金枪鱼)比海鲳鱼汞的含量高,为该海域海产品重金属汞的污染状况提供理论基础。

  3. Essential and toxic element concentrations in blood and urine and their associations with diet: Results from a Norwegian population study including high-consumers of seafood and game

    Energy Technology Data Exchange (ETDEWEB)

    Birgisdottir, B.E.; Knutsen, H.K.; Haugen, M.; Gjelstad, I.M. [Division of Environmental Medicine, Norwegian Institute of Public Health, Oslo (Norway); Jenssen, M.T.S. [Norwegian Institute for Water Research, Oslo (Norway); Ellingsen, D.G.; Thomassen, Y. [National Institute of Occupational Health, Oslo (Norway); Alexander, J. [Office of the Director-General, Norwegian Institute of Public Health, Oslo (Norway); Meltzer, H.M. [Division of Environmental Medicine, Norwegian Institute of Public Health, Oslo (Norway); Brantsæter, A.L., E-mail: Anne.Lise.Brantsaeter@fhi.no [Division of Environmental Medicine, Norwegian Institute of Public Health, Oslo (Norway)

    2013-10-01

    The first aim of the study was to evaluate calculated dietary intake and concentrations measured in blood or urine of essential and toxic elements in relation to nutritional and toxicological reference values. The second aim was to identify patterns of the element concentrations in blood and urine and to identify possible dietary determinants of the concentrations of these elements. Adults with a known high consumption of environmental contaminants (n = 111), and a random sample of controls (n = 76) answered a validated food frequency questionnaire (FFQ). Complete data on biological measures were available for 179 individuals. Blood and urine samples were analyzed for selenium, iodine, arsenic, mercury, cadmium and lead. Principal component analysis was used to identify underlying patterns of correlated blood and urine concentrations. The calculated intakes of selenium, iodine, inorganic arsenic and mercury were within guideline levels. For cadmium 24% of the high consumer group and 8% of the control group had intakes above the tolerable weekly intake. Concentrations of lead in blood exceeded the bench-mark dose lower confidence limits for some participants. However, overall, the examined exposures did not give rise to nutritional or toxicological concerns. Game consumption was associated with lead in blood (B{sub ln} 0.021; 95%CI:0.010, 0.031) and wine consumption. Seafood consumption was associated with urinary cadmium in non-smokers (B{sub ln} 0.009; 95%CI:0.003, 0.015). A novel finding was a distinct pattern of positively associated biological markers, comprising iodine, selenium, arsenic and mercury (eigenvalue 3.8), reflecting seafood intake (B 0.007; 95%CI:0.004, 0.010). The study clearly demonstrates the significance of seafood as a source of both essential nutrients and toxic elements simultaneously and shows that exposure to various essential and toxic elements can be intertwined. - Highlights: • A study on interplay and sources of six different

  4. Hepatitis E seroprevalence and related risk factors among seafood processing workers: a cross-sectional survey in Shandong Province, China

    Directory of Open Access Journals (Sweden)

    Weihong Cui

    2016-08-01

    Conclusions: There is a higher risk of HEV infection in those who have direct contact with raw seafood. This study will help identify the risk factors for HEV infection and provide guidance on controlling HEV infection in the seafood processing occupations.

  5. A Summary of the United States Food and Drug Administrations' Food Safety Program for Imported Seafood; One Country's Approach.

    Science.gov (United States)

    Koonse, Brett

    2016-04-29

    It is well known that the vast majority of seafood is captured or farmed in emerging countries and exported to developed countries. This has resulted in seafood being the number one traded food commodity in the world. Food safety is essential to this trade. Exporting countries should understand the regulatory food safety programs of the countries they ship to in order to comply with their applicable laws and regulations to avoid violations and disruptions in trade. The United States (U.S.) imports more seafood than any individual country in the world but the European Union (E.U.) countries, as a block, import significantly more. Each importing country has its own programs and systems in place to ensure the safety of imported seafood. However, most countries that export seafood have regulatory programs in place that comply with the import requirements of the E.U. The purpose of this paper is to describe the United States Food and Drug Administration's (USFDA) imported seafood safety program. The primary audience for the information is foreign government regulators, seafood exporters, and U.S. importers. It can also give consumers confidence that f U.S. seafood is safe no matter which country it originates from.

  6. Evaluation of Seafood Product Concepts by Young Adults and Families with Young Children from Denmark, Norway, and Iceland

    NARCIS (Netherlands)

    Altintzoglou, T.; Sveinsdottir, K.; Einarsdottir, G.; Schelvis, R.; Luten, J.B.

    2012-01-01

    This article describes the results of a study that tested the responses to 14 seafood concepts among young adults and families with young children in Denmark, Norway, and Iceland. This study was aimed at gaining insight into the evaluation of new seafood product concepts by individuals with low seaf

  7. A short food frequency questionnaire to assess intake of seafood and n-3 supplements: validation with biomarkers

    Directory of Open Access Journals (Sweden)

    Dahl Lisbeth

    2011-11-01

    Full Text Available Abstract Background Seafood intake is associated with beneficial effects for human health. Seafood provides a number of nutrients beyond the traditionally known long chain marine n-3 fatty acids EPA, DPA and DHA, such as protein, vitamin D, iodine, selenium and vitamin B12. Valid assessment of dietary seafood and n-3 supplement intakes are becoming increasingly crucial when giving recommendations to populations as seafood consumption is regarded as an important part of a healthy and balanced diet. Methods The aim was to validate a short FFQ developed for assessment of dietary intake of seafood and n-3 supplements using the biomarkers marine n-3 fatty acids in erythrocytes and 25(OHD in serum. Results Fifty-three healthy Norwegians aged 30-64 years with a mean BMI of 25 kg/m2 were compliant with the study protocol. 70% reported eating seafood for dinner one to two times per week, and 45% reported to eat seafood as spread, in salads or as snack meal three to five times or more per week. The FFQ correlated significantly with both the levels of marine n-3 fatty acids (r = 0.73, p Conclusion The present short FFQ predicted strongly the levels of marine n-3 fatty acids in erythrocytes, and predicted fairly good the level of serum 25(OHD and may therefore be a valid method for assessment of seafood and n-3 supplements intake among adults.

  8. Mercury exposure and a shift toward oxidative stress in avid seafood consumers.

    Science.gov (United States)

    Karimi, Roxanne; Vacchi-Suzzi, Caterina; Meliker, Jaymie R

    2016-04-01

    Mechanisms of mercury (Hg) toxicity at low doses from seafood consumption, the most common exposure route, are not well understood. We tested the hypothesis that seafood Hg exposure is related to a shift in redox status, indicated by a decrease in the ratio of reduced to oxidized glutathione (GSH:GSSG) in blood, or increase in redox potential (Eh). We also examined whether key seafood nutrients (selenium (Se), omega-3 fatty acids) confound or modify this shift. We measured blood concentrations of total Hg, Se, GSH, GSSG, and the Omega-3 Index (% omega-3s of total fatty acids in red blood cell membranes) in seafood consumers in Long Island, NY. We examined relationships between Hg, GSH:GSSG ratio and Eh. Elevated blood Hg (>5.8µgL(-1)) was associated with lower GSH:GSSG (β=-116.73, p=0.01), with no evidence of confounding by Se or Omega-3 Index. However, in models stratified by Omega-3 Index levels, Hg-GSH:GSSG associations were weakened among those with high Omega-3 Index levels (>6% of fatty acids, β=-63.46, p=0.28), and heightened among those with low Omega-3 Index (β=-182.53, p<0.01). We observed comparable patterns for Eh in relation to Hg. These results support the hypothesis that Hg exposure from seafood is linked to a shift in redox status toward oxidative stress, modified by omega-3 fatty acids in this population. Further work should examine the role of different seafood nutrients and Hg-induced shifts in redox status in the diverse health effects associated with elevated Hg exposure.

  9. A tiered assessment framework to evaluate human health risk of contaminated sediment.

    Science.gov (United States)

    Greenfield, Ben K; Melwani, Aroon R; Bay, Steven M

    2015-07-01

    For sediment contaminated with bioaccumulative pollutants (e.g., PCBs and organochorine pesticides), human consumption of seafood that contain bioaccumulated sediment-derived contaminants is a well-established exposure pathway. Historically, regulation and management of this bioaccumulation pathway has focused on site-specific risk assessment. The state of California (United States) is supporting the development of a consistent and quantitative sediment assessment framework to aid in interpreting a narrative objective to protect human health. The conceptual basis of this framework focuses on 2 key questions: 1) do observed pollutant concentrations in seafood from a given site pose unacceptable health risks to human consumers? and 2) is sediment contamination at a site a significant contributor to seafood contamination? The first question is evaluated by interpreting seafood tissue concentrations at the site, based on health risk calculations. The second question is evaluated by interpreting site-specific sediment chemistry data using a food web bioaccumulation model. The assessment framework includes 3 tiers (screening assessment, site assessment, and refined site assessment), which enables the assessment to match variations in data availability, site complexity, and study objectives. The second and third tiers use a stochastic simulation approach, incorporating information on variability and uncertainty of key parameters, such as seafood contaminant concentration and consumption rate by humans. The framework incorporates site-specific values for sensitive parameters and statewide values for difficult to obtain or less sensitive parameters. The proposed approach advances risk assessment policy by incorporating local data into a consistent region-wide problem formulation, applying best available science in a streamlined fashion.

  10. Observed and modeled surface Lagrangian transport between coastal regions in the Adriatic Sea with implications for marine protected areas

    Science.gov (United States)

    Carlson, Daniel F.; Griffa, Annalisa; Zambianchi, Enrico; Suaria, Giuseppe; Corgnati, Lorenzo; Magaldi, Marcello G.; Poulain, Pierre-Marie; Russo, Aniello; Bellomo, Lucio; Mantovani, Carlo; Celentano, Paolo; Molcard, Anne; Borghini, Mireno

    2016-04-01

    Surface drifters and virtual particles are used to investigate transport between seven coastal regions in the central and southern Adriatic Sea to estimate the degree to which these regions function as a network. Alongshore coastal currents and cyclonic gyres are the primary circulation features that connected regions in the Adriatic Sea. The historical drifter observations span 25 years and, thus, provide estimates of transport between regions realized by the mean surface circulation. The virtual particle trajectories and a dedicated drifter experiment show that southeasterly Sirocco winds can drive eastward cross-Adriatic transport from the Italian coast near the Gargano Promontory to the Dalmatian Islands in Croatia. Southeasterly winds disrupt alongshore transport on the west coast. Northwesterly Mistral winds enhanced east-to-west transport and resulted in stronger southeastward coastal currents in the western Adriatic current (WAC) and export to the northern Ionian Sea. The central Italian regions showed strong connections from north to south, likely realized by alongshore transport in the WAC. Alongshore, downstream transport was weaker on the east coast, likely due to the more complex topography introduced by the Dalmatian Islands of Croatia. Cross-Adriatic connection percentages were higher for east-to-west transport. Cross-Adriatic transport, in general, occurred via the cyclonic sub-gyres, with westward (eastward) transport observed in the northern (southern) arms of the central and southern gyres.

  11. Dense water formation and BiOS-induced variability in the Adriatic Sea simulated using an ocean regional circulation model

    Science.gov (United States)

    Dunić, Natalija; Vilibić, Ivica; Šepić, Jadranka; Somot, Samuel; Sevault, Florence

    2016-08-01

    A performance analysis of the NEMOMED8 ocean regional circulation model was undertaken for the Adriatic Sea during the period of 1961-2012, focusing on two mechanisms, dense water formation (DWF) and the Adriatic-Ionian Bimodal Oscillating System (BiOS), which drive interannual and decadal variability in the basin. The model was verified based on sea surface temperature and sea surface height satellite measurements and long-term in situ observations from several key areas. The model qualitatively reproduces basin-scale processes: thermohaline-driven cyclonic circulation and freshwater surface outflow along the western Adriatic coast, dense water dynamics, and the inflow of Ionian and Levantine waters to the Adriatic. Positive temperature and salinity biases are reported; the latter are particularly large along the eastern part of the basin, presumably because of the inappropriate introduction of eastern Adriatic rivers into the model. The highest warm temperature biases in the vertical direction were found in dense-water-collecting depressions in the Adriatic, indicating either an inappropriate quantification of DWF processes or temperature overestimation of modelled dense water. The decadal variability in the thermohaline properties is reproduced better than interannual variability, which is considerably underestimated. The DWF rates are qualitatively well reproduced by the model, being larger when preconditioned by higher basin-wide salinities. Anticyclonic circulation in the northern Ionian Sea was modelled only during the Eastern Mediterranean Transient. No other reversals of circulation that could be linked to BiOS-driven changes were modelled.

  12. Spatial data integration for analyzing the dynamics of Albanian Adriatic shoreline

    Science.gov (United States)

    Arapi, Luan; Nikolli, Pal; Kovaçi, Sander

    2016-04-01

    Shoreline mapping and shoreline change detection are critical subjects for coastal resource management, coastal environmental protection and sustainable coastal development and planning. Coastal changes are attracting more focus since they are important environmental indicators that directly impact coastal economic development and land management. Changes in the shape of shoreline may essentially affect the environment of the coastal zone. These may be caused by natural processes and human activities. The undertaken work focuses on analyzing the Adriatic shoreline dynamics, using spatial temporal data, by taking advantage of Geographic Informatin System (GIS) and Remote Sensing (RS). Shoreline mapping focuses on some specific issues such as mapping methods used to acquire shoreline data, models and database design used to represent shoreline in the spatial database and shoreline -change analysis methods. The study area extends from the mouth of Buna River in the north to Vlora Bay in the south covering a total length of about 220 km. Detection and future assessment of Albanian Adriatic shoreline spatial position is carried out through integration of multi scale resolution of spatial temporal data and different processing methods. We have combined topographic maps at different scales (1:75 000, 1918; 1:50 000, 1937; 1:25 000, 1960, 1986 and 1:10 000, 1995), digital aerial photographs of 2007 year, satellite images of Landsat TM, Landsat ETM+ and field observed GIS data. Generation of spatial data is carried out through vectorization process and image processing. Monitoring the dynamics of shoreline position change requires understanding the coastal processes as well as coastal mapping methods. The net rates of variations in the position of the shoreline are calculated according to transects disposed perpendicularly to the baseline and spaced equally along the coast. Analysis of the relative impact of the natural factors and human activities, it is fundamental

  13. Consumers' health risk-benefit perception of seafood and attitude toward the marine environment: Insights from five European countries.

    Science.gov (United States)

    Jacobs, Silke; Sioen, Isabelle; Pieniak, Zuzanna; De Henauw, Stefaan; Maulvault, Ana Luisa; Reuver, Marieke; Fait, Gabriella; Cano-Sancho, German; Verbeke, Wim

    2015-11-01

    This research classifies European consumers into segments based on their health risk-benefit perception related to seafood consumption. The profiling variables of these segments are seafood consumption frequency, general attitude toward consuming fish, confidence in control organizations, attitude toward the marine environment, environmental concern and socio-demographics. A web-based survey was performed in one western European country (Belgium), one northern European country (Ireland) and three southern European countries (Italy, Portugal and Spain), resulting in a total sample of 2824 participants. A cluster analysis was performed based on risk-benefit perception related to seafood and the profiles of the segments were determined by a robust 2-way ANOVA analysis accounting for country effects. Although this study confirms consumers' positive image of consuming seafood, gradients are found in health risk-benefit perception related to seafood consumption. Seafood consumption frequency is mainly determined by country-related traditions and habits related to seafood rather than by risk-benefit perceptions. Segments with a higher benefit perception, irrespective of their level of risk perception, show a more positive attitude toward consuming seafood and toward the marine environment; moreover, they report a higher concern about the marine environment and have a higher involvement with seafood and with the marine environment. Consequently, information campaigns concentrating on pro-environmental behavior are recommended to raise the involvement with seafood and the marine environment as this is associated with a higher environmental concern. This research underpins that in such information campaigns a nationally differentiated rather than a pan-European or international information strategy should be aimed for because of significant cultural differences between the identified segments.

  14. Readily Available Sources of Long-Chain Omega-3 Oils: Is Farmed Australian Seafood a Better Source of the Good Oil than Wild-Caught Seafood?

    Directory of Open Access Journals (Sweden)

    Peter D. Nichols

    2014-03-01

    Full Text Available Seafood consumption enhances intake of omega-3 long-chain (≥C20 polyunsaturated fatty acids (termed LC omega-3 oils. Humans biosynthesize only small amounts of LC-omega-3, so they are considered semi-essential nutrients in our diet. Concern has been raised that farmed fish now contain lower LC omega-3 content than wild-harvested seafood due to the use of oil blending in diets fed to farmed fish. However, we observed that two major Australian farmed finfish species, Atlantic salmon (Salmo salar and barramundi (Lates calcifer, have higher oil and LC omega-3 content than the same or other species from the wild, and remain an excellent means to achieve substantial intake of LC omega-3 oils. Notwithstanding, LC omega-3 oil content has decreased in these two farmed species, due largely to replacing dietary fish oil with poultry oil. For Atlantic salmon, LC omega-3 content decreased ~30%–50% between 2002 and 2013, and the omega-3/omega-6 ratio also decreased (>5:1 to <1:1. Australian consumers increasingly seek their LC omega-3 from supplements, therefore a range of supplement products were compared. The development and future application of oilseeds containing LC omega-3 oils and their incorporation in aquafeeds would allow these health-benefitting oils to be maximized in farmed Australian seafood. Such advances can assist with preventative health care, fisheries management, aquaculture nutrition, an innovative feed/food industry and ultimately towards improved consumer health.

  15. Readily available sources of long-chain omega-3 oils: is farmed Australian seafood a better source of the good oil than wild-caught seafood?

    Science.gov (United States)

    Nichols, Peter D; Glencross, Brett; Petrie, James R; Singh, Surinder P

    2014-03-11

    Seafood consumption enhances intake of omega-3 long-chain (≥C₂₀) polyunsaturated fatty acids (termed LC omega-3 oils). Humans biosynthesize only small amounts of LC-omega-3, so they are considered semi-essential nutrients in our diet. Concern has been raised that farmed fish now contain lower LC omega-3 content than wild-harvested seafood due to the use of oil blending in diets fed to farmed fish. However, we observed that two major Australian farmed finfish species, Atlantic salmon (Salmo salar) and barramundi (Lates calcifer), have higher oil and LC omega-3 content than the same or other species from the wild, and remain an excellent means to achieve substantial intake of LC omega-3 oils. Notwithstanding, LC omega-3 oil content has decreased in these two farmed species, due largely to replacing dietary fish oil with poultry oil. For Atlantic salmon, LC omega-3 content decreased ~30%-50% between 2002 and 2013, and the omega-3/omega-6 ratio also decreased (>5:1 to oils and their incorporation in aquafeeds would allow these health-benefitting oils to be maximized in farmed Australian seafood. Such advances can assist with preventative health care, fisheries management, aquaculture nutrition, an innovative feed/food industry and ultimately towards improved consumer health.

  16. Polybrominated diphenyl ethers in mussels (Mytilus galloprovincialis) collected from Central Adriatic Sea.

    Science.gov (United States)

    Piersanti, Arianna; Tavoloni, Tamara; Bastari, Eleonora; Lestingi, Carmela; Romanelli, Sara; Saluti, Giorgio; Moretti, Simone; Galarini, Roberta

    2015-12-15

    One-hundred and thirty-four samples of mussels (Mytilus galloprovincialis) collected along Central Adriatic Sea in 2013 were examined to determine the levels of fifteen congeners of polybrominated diphenyl ethers (PBDEs). The purified samples were analysed by gas-chromatography coupled to tandem mass spectrometry (GC-MS/MS) applying the isotopic dilution. Only four congeners (PBDE 47, PBDE 99, PBDE 49 and PBDE 100) were present above the established limits of quantification with mean concentrations equal to 73, 30, 19 and 18 pg g(-1), respectively. The concentrations of PBDEs (sum) ranged from 27 to 386 pg g(-1), with the highest levels around the coastal area of Ancona town. The here found levels were comparable to those measured in mussels collected along Southern Adriatic Sea.

  17. POTENTIAL FOR DEVELOPMENT OF INTEGRATED MULTI-TROPHIC AQUACULTURE (IMTA IN THE ADRIATIC SEA

    Directory of Open Access Journals (Sweden)

    Danijel Kanski

    2012-12-01

    Full Text Available Over recent years, scientific interest for investigating ecological, economical and social effects of Integrated Multi-trophic Aquaculture (IMTA has increased worldwide. Its development in the Mediterranean, including the Adriatic Sea, is still in the early stages. The main obstacle preventing IMTA to be commercially adopted is the lack of scientific information on choosing compatible species, knowing the carrying capacity of a production area and interactions between species feeding at different trophic levels, as well as its socio–economic impacts. Current experience in the area is based on smaller experimental studies of local importance but they generally give a good insight into potential of IMTA and its interactions with the environment. The aim of this paper was to overview current literature and experiences worldwide and to review the potential for adopting IMTA principles in the Adriatic Sea.

  18. First record of Ostreopsis cfr. ovata on macroalgae in the Northern Adriatic Sea

    Energy Technology Data Exchange (ETDEWEB)

    Monti, Marina [Department of Biological Oceanography, National Institute of Oceanography and Applied Geophysics, Via Auguste Piccard 54, 34010 Trieste (Italy)]. E-mail: mmonti@inogs.it; Minocci, Marco [Department of Biological Oceanography, National Institute of Oceanography and Applied Geophysics, Via Auguste Piccard 54, 34010 Trieste (Italy); Beran, Alfred [Department of Biological Oceanography, National Institute of Oceanography and Applied Geophysics, Via Auguste Piccard 54, 34010 Trieste (Italy); Ivesa, Ljiljana [Ruder Boskovic Institute, Center for Marine Research, G. Paliaga 5, 52210 Rovinj (Croatia)

    2007-05-15

    Ostreopsis ovata is an epiphytic potentially toxic dinoflagellate. It has a world-wide distribution, normally associated with other epiphytic or benthic dinoflagellates. In tropical seas O. ovata is often associated with the genera Gambierdiscus, Coolia and Prorocentrum, causing cinguatera fish poisoning. Recently, Ostreopsis spp. blooms in the Tyrrhenian and southern Adriatic Sea have been related to human health problems, such as breathing and skin irritation. Here we report the first record of Ostreopsis cfr. ovata in the Northern Adriatic Sea. O. cfr. ovata was isolated from macroalgae in two areas, the Gulf of Trieste (Italy) and close to Rovinj (Croatia). The microalga was identified by scanning electron microscopy and by fluorescence light microscopy. Size range and thecal pore structure were similar to those described for O. cfr. ovata in previous studies. Ostreopsis cfr. ovata was present on all the macroalgae collected, particularly browns and reds. The microalgal association on macroalgae was mostly composed of Ostreopsis sp., Coolia monotis and Coscinodiscus sp.

  19. Comparison of Model-Simulated and Observed Currents in the Central Adriatic During DART

    Science.gov (United States)

    2009-01-01

    AUTHOR(S) Paul J. Martin, Jeffrey W. Book, Derek M. Burrage, Clark D. Rowley, Marina Tudor 5d. PROJECT NUMBER 5e. TASK NUMBER 5f. WORK UNIT...OF RESPONSIBLE PERSON Paul Martin 19b. TELEPHONE NUMBER (Include area code) 228-688-5447 Standard Form 298 (Rev. 8/98I Prescribed by ANSI Std...Kuzmic, and M. Wimbush (2009), Vertical structure of bottom Ekman tidal flow: Observatios, theory, and modeling from northern Adriatic, J. Geophys. Res

  20. Eutrophication in the northern Adriatic Sea: Benthic fluxes and nutrient budgets

    Energy Technology Data Exchange (ETDEWEB)

    Berelson, W.M.; Hammond, D.E. (Univ. of Southern California, Los Angeles (United States)); Giordani, P. (Inst. di Geologia Marina-CNR, Bologna (Italy))

    1990-01-09

    The northern Adriatic Sea has been plagued by problems of eutrophication. This area is relatively shallow (maximum depth = 60m), becoming stratified during the summer months which inhibits oxygen transport to bottom waters. Anthropogenic nutrient loading in rivers entering the northern Adriatic has increased nutrient input to this system and stimulated algai growth. Five stations in the western Adriatic (south of the Po River Delta) were occupied during September, 1988 and benthic flux chambers used to measure nutrient fluxes. These sites included 3 stations previously studied in 1982. Flux measurements of dissolved silica, nitrate, oxygen, ammonia, phosphate, CO[sub 2], alkalinity and radon were made during 24 hour incubations of flux chambers (area covered - 0.07 m[sup 2], volume = [approximately]81) that were continuously stirred and sampled periodically. Nutrient fluxes measured were generally consistent with the fluxes measured previously in June, 1982 except for radon fluxes which were 203 times greater in the earlier field season. There was a general trend in nutrient fluxes to decrease offshore, a pattern probably controlled by the sedimentation patterns because fine grained, organic matter-rich sediment are concentrated in a zone near shore. Average regional fluxes were (in mmol m[sup -2]d[sup -1], negative values indicate flux into sediment): Oxygen (-12), CO[sub 2] (19), Alkalinity (4), Silica (3.3), Ammonia (1.5), Phosphate (0.1) and Nitrate (0.3). The carbon/ammonia flux ratio is about twice the C/N ratio in marine phytoplankton, suggesting that large amounts of denitrification may be occuring in these sediments. Comparisons of benthic fluxes and sediment burial rates indicate that 50-90% of the carbon, silica, phosphorus and nitrogen arriving at the sediment-water interface is recycled before burial. The nutrient input to the water column from NW Adriatic sediments is about equal to the input from coastal rivers.

  1. Sea-level changes and crustal movements recorded along the east Adriatic coast

    Energy Technology Data Exchange (ETDEWEB)

    Orlic, M.; Pasaric, M. [Zagreb Univ., Zagreb (Croatia). Andrija Mohorovicic Geophysical institute

    2000-08-01

    Sea-level changes in the Adriatic are investigated on the basis of monthly mean sea levels registered at Croatian tide-gauge stations Rovinj, Bakar, Split and Dubrovnik since the beginning of the 1950s. A comparison of sea-level anomalies with air-pressure anomalies recorded simultaneously at Pula, Rijeka, Split and Dubrovnik reveals a statistically significant relationship: a 1 mbar air-pressure change corresponds to a 1.8-2.0 cm sea-level change. The relationship enables sea-level anomalies to be corrected and, consequently, long term sea-level changes to be determined more reliably. A 20-year cycle observed in both the uncorrected and corrected anomalies is interpreted in terms of the global bidecadal signal and its regional manifestation in the Mediterranean. In order to minimize the effects of the bidecadal cycle, trends are analysed over a 30-year sliding window. The procedure reveals that the trends very along the Croatian coast from ca. 1mm/a in the North to zero to the South, with deceleration being visible at all the stations during the early 1970s. The finding is interpreted in terms of (a) global sea-level rise; (b) regional multidecadal sea-level variability, and (c) local tectonic movements. Multidecadal atmosphere above Europe and/or to the anthropogenic changes of the Mediterranean freshwater budget. Tectonic movements bring about a rising of the middle and south Adriatic budget. Tectonic movements bring about a rising of the middle and south Adriatic coast relatively to the north Adriatic coast at a 1 mm/a speed, with the Bakar area being characterized by anomalous crustal motions.

  2. Bora-induced currents corresponding to different synoptic conditions above the Adriatic

    Energy Technology Data Exchange (ETDEWEB)

    Beg Paklar, G.; Dadic, V.; Grbec, B. [Inst. of Oceanography and Fisheries, Split (Croatia); Bajic, A. [Meteorological and Hydrological Service of Croatia, Zagreb (Croatia); Orlic, M. [Andrija Mohorovicic Geophysical Inst., Faculty of Science, Univ. of Zagreb, Zagreb (Croatia)

    2005-07-01

    The Bora wind field is characterised by strong vorticity and divergence. Several numerical experiments, in which an oceanographic model was forced with northeasterly winds having climatological alongshore variability, were performed in order to study the influence of spatial variability in the bora wind field on the surface currents in the northern Adriatic. Numerical model results showed that during bora episodes with lower speeds and fast offshore decay surface currents along transect Rovinj - Po River are predominantly in the downwind direction. On the other hand, during bora episodes with strong intensity and slow offshore decay, a cyclonic gyre due to the pronounced bora alongshore variability is formed in the northernmost part of the Adriatic Sea and the studied transect is influenced by the counter currents. Moreover, bora having a high speed and a short offshore range produces the same effect in the eastern part of the Rovinj - Po River transect as low-speed bora characterised by slow offshore decay. Eulerian current measurements performed in the northern Adriatic during bora episodes characterised by different synoptic conditions supported the numerical model findings. Surface currents during the bora episode of 8-11 February 1984 were directed downwind, whereas during the episode of 12-19 February 1984 they were directed upwind. The first episode was characterised by a deep bora layer with cyclonic activity over the western Mediterranean and Genoa Bay, whereas the second one was accompanied by temperature inversion and a southwesterly tropospheric wind above a shallow bora layer. According to the hydraulic theory developed by Smith (1985), an observed descent of isentropes during the second bora episode led to the stronger acceleration in the bora layer and its larger offshore extent. Different offshore bora decays during studied events were confirmed by a comparison of the wind data originating from the meteorological stations positioned on the opposite

  3. Characterization of aerosols above the Northern Adriatic Sea: Case studies of offshore and onshore wind conditions

    Science.gov (United States)

    Piazzola, J.; Mihalopoulos, N.; Canepa, E.; Tedeschi, G.; Prati, P.; Zarmpas, P.; Bastianini, M.; Missamou, T.; Cavaleri, L.

    2016-05-01

    Aerosol particles in coastal areas result from a complex mixing between sea spray aerosols locally generated at the sea surface by the wind-waves interaction processes and a continental component resulting from natural and/or anthropogenic sources. This paper presents a physical and chemical analysis of the aerosol data acquired from May to September 2014 in the Adriatic Sea. Aerosol distributions were measured on the Acqua Alta platform located 15 km off the coast of Venice using two Particle Measuring System probes and a chemical characterization was made using an Ion Chromatography analysis (IC). Our aim is to study both the sea-spray contribution and the anthropogenic influence in the coastal aerosol of this Mediterranean region. To this end, we focus on a comparison between the present data and the aerosol size distributions measured south of the French Mediterranean coast. For air masses of marine origin transported by southern winds on the French coast and by the Sirocco in the Adriatic, we note a good agreement between the concentrations of super-micrometer aerosols measured in the two locations. This indicates a similar sea surface production of sea-spray aerosols formed by bubble bursting processes in the two locations. In contrast, the results show larger concentrations of submicron particles in the North-Western Mediterranean compared to the Adriatic, which result probably from a larger anthropogenic background for marine conditions. In contrast, for a coastal influence, the chemical analysis presented in the present paper seems to indicate a larger importance of the anthropogenic impact in the Northern Adriatic compared to the North-Western Mediterranean.

  4. Accumulation of cyanobacterial toxins in freshwater "seafood" and its consequences for public health: A review

    NARCIS (Netherlands)

    Ibelings, B.W.; Chorus, I.

    2007-01-01

    This review summarizes and discusses the current understanding of human exposure to cyanobacterial toxins in “seafood” collected from freshwater and coastal areas. The review consists of three parts: (a) the existing literature on concentrations of cyanobacterial toxins in seafood is reviewed, and t

  5. Occurrence of halogenated flame retardants in commercial seafood species available in European markets

    NARCIS (Netherlands)

    Aznar-alemany, Òscar; Trabalón, Laura; Jacobs, Silke; Barbosa, Vera Liane; Tejedor, Margarita Fernández; Granby, Kit; Kwadijk, Christiaan; Cunha, Sara C.; Ferrari, Federico; Vandermeersch, Griet; Sioen, Isabelle; Verbeke, Wim; Vilavert, Lolita; Domingo, José L.; Eljarrat, Ethel; Barceló, Damià

    2016-01-01

    PBDEs (congeners 28, 47, 99, 100, 153, 154, 183, 209), HBCD (α, β, γ), emerging brominated flame retardants (PBEB, HBB and DBDPE), dechloranes (Dec 602, 603, 604, syn- and anti-DP), TBBPA, 2,4,6-TBP and MeO-PBDEs (8 congeners) were analysed in commercial seafood samples from European countries. Leve

  6. Prevalence and Molecular Typing of Vibrio parahaemolyticus (tdh+) isolated from seafood using PCR-based methods

    Science.gov (United States)

    Vibrio parahaemolyticus is a pathogen most frequently implicated in foodborne outbreaks linked to the consumption of seafood in the coastal cities of China. The pathogenicity of environmental V. parahaemolyticus is mostly correlated with the production of thermostable direct hemolysin (TDH). In orde...

  7. Myanmar seafood exports:Quick scan of the EU market potential

    NARCIS (Netherlands)

    Pijl, van der W.; Duijn, van A.P.

    2012-01-01

    The Asian region is a major supplier of fish products to the European market. The aquaculture sector in a number of Asian countries has become an important producer as well as exporter of various captured and cultured seafood products. Since Myanmar is in a transition to democracy and the EU decided

  8. Secure sustainable seafood from developing countries. Require improvements as conditions for market access

    NARCIS (Netherlands)

    Sampson, G.S.; Sanchirico, J.N.; Roheim, C.A.; Bush, S.R.; Taylor, J.E.; Allison, E.A.; Anderson, J.L.; Ban, N.C.; Fujita, R.; Jupiter, S.; Wilson, J.R.

    2015-01-01

    Demand for sustainably certified wild-caught fish and crustaceans is increasingly shaping global seafood markets. Retailers such as Walmart in the United States, Sainsbury's in the United Kingdom, and Carrefour in France, and processors such as Canadianbased High Liner Foods, have promised to source

  9. [Effects of food supplements on the safety and quality of seafoods].

    Science.gov (United States)

    Vorob'ev, V V

    2007-01-01

    The safety of foodstuffs from the hydrocoles made with food supplements is considered. The use in the seafoods of sodium benzoate (E 211), a preservative, monosodium glutamate (E 621), an agent enhancing the flavor of the food, does not provide safety of products, the use of which negative influences human health.

  10. Factors Influencing Industry Uptake of Marketing & Supply Chain Innovations within the Australian Seafood Cooperative Research Centre

    NARCIS (Netherlands)

    Dentoni, D.; English, F.

    2012-01-01

    This study identifies factors influencing the Australian seafood industry’s adoption of marketing and supply chain innovations created from public-private funded research and development (R&D). A grounded theory approach was followed by comparing and contrasting the evidence from 35 projects fun

  11. Three Anisakis spp. isolated from toothed whales stranded along the eastern Adriatic Sea coast.

    Science.gov (United States)

    Blažeković, Kristina; Pleić, Ivana Lepen; Đuras, Martina; Gomerčić, Tomislav; Mladineo, Ivona

    2015-01-01

    Knowledge concerning cetacean ecology in the Mediterranean is limited but important for sustainable planning and enforcement of appropriate conservation measures. Any information that might help to elucidate their ecology is essential. We explored the population and genetic structures of Anisakis spp. nematodes isolated from four toothed whale species - bottlenose dolphins (Tursiops truncatus), striped dolphins (Stenella coeruleoalba), Risso's dolphins (Grampus griseus) and Cuvier's beaked whales (Ziphius cavirostris) - stranded along the eastern Adriatic Sea coast (1990-2012) to reveal more information on host ecological patterns. Lower parasite prevalence was observed in resident dolphin species compared with occasionally occurring species, as well as in young compared with adult dolphins, indicating different feeding habits related to age. No unequivocal relationship between the biological traits of a host (age, body length, body mass and blubber depth) and Anisakis population parameters was observed. Phylogenetic analysis revealed a new geographical record of Anisakis simplex sensu stricto (1.96%) and Anisakis physeteris (1.31%) in the Adriatic Sea in addition to resident Anisakis pegreffii (96.73%). In an assessment of the Adriatic Sea and oceans worldwide, the genetic structure of Anisakis revealed that A. pegreffii populations do not differ among various final host species but do differ with respect to geographical location in contrast to previously accepted Anisakis panmixia.

  12. Modelling the formation of dense water in the northern Adriatic: Sensitivity studies

    Science.gov (United States)

    Vilibić, Ivica; Mihanović, Hrvoje; Janeković, Ivica; Šepić, Jadranka

    2016-05-01

    This study aims to document the effects of imposing different river runoff forcing and tidal forcing to the dense water formation (DWF) rates and dynamics in a semi-enclosed sea. An extreme DWF episode that occurred in the winter of 2012 in the shallow northern Adriatic Sea during a prolonged cold bora wind outbreak event has been reproduced using a one-way coupled atmosphere-ocean modelling system comprised of the atmospheric Aladin/HR mesoscale model and ocean ROMS model. Three different river runoff forcing and tides/no tides scenarios were imposed on the model. The introduction of tides and river climatology instead of real rivers did not substantially change the modelled DWF transports and volumes, whereas the simulation using the old Raicich climatology resulted in a substantial freshening of the entire Adriatic that reduced or prevented the DWF at sites in the northern and northeastern Adriatic. The necessity of using an up-to-date river runoff climatology to properly reproduce the DWF in semi-enclosed seas is emphasised.

  13. Seabed litter composition, distribution and sources in the Northern and Central Adriatic Sea (Mediterranean).

    Science.gov (United States)

    Pasquini, Giulia; Ronchi, Francesca; Strafella, Pierluigi; Scarcella, Giuseppe; Fortibuoni, Tomaso

    2016-12-01

    Detecting the origin of marine benthic litter is fundamental for developing policies aimed at achieving the Good Environmental Status in European Seas by 2020, as requested by the Marine Strategy Framework Directive (MSFD). The abundance and composition of benthic litter in the Northern and Central Adriatic Sea were investigated at 67 stations with bottom trawl nets. Average density of benthic litter was 913±80items/km(2), ranking the Adriatic as one of the most polluted basins worldwide. Plastic was dominant in terms of numbers (80%) and weight (62%), and mainly consisted in bags, sheets and mussel nets. Higher quantities of litter were found in coastal areas, especially in front river mouths, coastal cities and mussel farms. In deep waters, litter hotspots were associated with most congested shipping lanes, indicating an additional litter input to the basin. Benthic litter composition resulted to be largely driven by the vicinity to local sources, i.e. mussel farming installations and most congested shipping routes. These findings provide useful insights to set measures to manage marine litter in the Adriatic region, and possibly to minimize this anthropogenic pollution.

  14. Oscillating Adriatic temperature and salinity regimes mapped using the Self-Organizing Maps method

    Science.gov (United States)

    Matić, Frano; Kovač, Žarko; Vilibić, Ivica; Mihanović, Hrvoje; Morović, Mira; Grbec, Branka; Leder, Nenad; Džoić, Tomislav

    2017-01-01

    This paper aims to document salinity and temperature regimes in the middle and south Adriatic Sea by applying the Self-Organizing Maps (SOM) method to the available long-term temperature and salinity series. The data were collected on a seasonal basis between 1963 and 2011 in two dense water collecting depressions, Jabuka Pit and Southern Adriatic Pit, and over the Palagruža Sill. Seasonality was removed prior to the analyses. Salinity regimes have been found to oscillate rapidly between low-salinity and high-salinity SOM solutions, ascribed to the advection of Western and Eastern Mediterranean waters, respectively. Transient salinity regimes normally lasted less than a season, while temperature transient regimes lasted longer. Salinity regimes prolonged their duration after the major basin-wide event, the Eastern Mediterranean Transient, in the early 1990s. A qualitative relationship between high-salinity regimes and dense water formation and dynamics has been documented. The SOM-based analyses have a large capacity for classifying the oscillating ocean regimes in a basin, which, in the case of the Adriatic Sea, beside climate forcing, is an important driver of biogeochemical changes that impacts trophic relations, appearance and abundance of alien organisms, and fisheries, etc.

  15. Estimation of the Adriatic sea water turnover time using fallout 90Sr as a radioactive tracer

    CERN Document Server

    Franic, Z

    2004-01-01

    Systematic, long term measurements, starting in 1963, of 90Sr activity concentrations in sea water have been performed at four locations (cities of Rovinj, Rijeka, Split and Dubrovnik) along the Croatian coast of the Adriatic sea. In addition, fallout samples were collected in the city of Zadar. 90Sr activity concentrations are in good correlation with the fallout activity, the coefficient of correlation being 0.72. After the nuclear moratorium on atmospheric nuclear bomb tests in 1960s, 90Sr activity concentrations in sea water exponentially dropped from 14.8 +/- 2.4 Bq/m3 in 1963 to 2.0 +/- 0.3 Bq/m3 in 2003. In the same period, the total annual 90Sr land surface deposit in Zadar fell by three orders of magnitude, from 713.3 Bq/m2 in 1963 to 0.4 Bq/m2 in 2003. Using strontium sea water and fallout data, a mathematical model was developed to describe the rate of change of 90Sr activity concentrations in the Adriatic sea water and estimate its mean residence time in the Adriatic. By fitting the experimental d...

  16. BACTERIOLOGICAL PROPERTIES OF MARINE WATER IN ADRIATIC FISH FARMS: ENUMERATION OF HETEROTROPHIC BACTERIA

    Directory of Open Access Journals (Sweden)

    Emin Teskeredžić

    2012-12-01

    Full Text Available Aquaculture is currently one of the fastest growing food production sectors in the world. Increase in nutrients and organic wastes lead to general deterioration of water quality. The problem of water quality is associated with both physical and chemical factors, as well as microbiological water quality. Heterotrophic bacteria play an important role in the process of decomposition of organic matter in water environment and indicate eutrophication process. Here we present our experience and knowledge on bacterial properties of marine water in the Adriatic fish farms with European sea bass (Dicentrarchus labrax L., 1758, with an emphasis on enumeration of heterotrophic bacteria in marine water. We applied two temperatures of incubation, as well as two methods for enumeration of heterotrophic bacteria: substrate SimPlate® test and spread plate method on conventional artificial media (Marine agar and Tryptic Soy agar with added NaCl. The results of analysis of bacteriological properties of marine water in the Adriatic fish farms showed that enumeration of heterotrophic bacteria in marine water depends on the applied incubation temperature and media for enumeration. At the same time, the incubation temperature of 22C favours more intense growth of marine heterotrophic bacteria, whereas a SimPlate test gives higher values of heterotrophic bacteria. Volatile values of heterotrophic bacteria during this research indicate a possible deterioration of microbiological water quality in the Adriatic fish farms and a need for regular monitoring of marine water quality.

  17. Modelling origin and transport fate of waste materials on the south-eastern Adriatic coast (Croatia

    Directory of Open Access Journals (Sweden)

    M. Tudor

    2014-12-01

    Full Text Available The south-eastern parts of the Adriatic Sea coastline were severely polluted by large amounts of accumulated waste material in the second half of November 2010. The waste, reported by major news agencies, accumulated dominantly during 21 November 2010 by favourable wind – ocean current transport system. In the study we analysed meteorological and oceanographic conditions that lead to the waste deposition using available in situ measurements, remote sensing data as well numerical models of the ocean and the atmosphere. The measured data reveal that an intensive rainfall event from 7 till 10 November 2010, over the parts of Montenegro and Albania, was followed by a substantial increase of the river water levels indicating flash floods that possibly splashed the waste material into a river and after to the Adriatic Sea. In order to test our hypothesis we set a number of numerical drifter experiments with trajectories initiated off the coast of Albania during the intensive rainfall events following their faith in space and time. One of the numerical drifter trajectory experiment resulted with drifters reached right position (south-eastern Adriatic coast and time (exactly by the time the waste was observed when initiated on 00:00 and 12:00 UTC of 10 November 2010 during the mentioned flash flood event.

  18. The carbon budget in the northern Adriatic Sea, a winter case study

    Science.gov (United States)

    Catalano, G.; Azzaro, M.; Bastianini, M.; Bellucci, L. G.; Bernardi Aubry, F.; Bianchi, F.; Burca, M.; Cantoni, C.; Caruso, G.; Casotti, R.; Cozzi, S.; Del Negro, P.; Fonda Umani, S.; Giani, M.; Giuliani, S.; Kovacevic, V.; La Ferla, R.; Langone, L.; Luchetta, A.; Monticelli, L. S.; Piacentino, S.; Pugnetti, A.; Ravaioli, M.; Socal, G.; Spagnoli, F.; Ursella, L.

    2014-07-01

    This paper presents a winter carbon budget for the northern Adriatic Sea, obtained through direct measurements during two multidisciplinary cruises and literature data. A box model approach was adopted to integrate estimates of stocks and fluxes of carbon species over the total area. The oligotrophy at the basin scale and the start of primary productivity well before the onset of spring stratification were observed. In winter, the system underwent a complete reset, as the mixing of water masses erased any signal of previous hypoxia or anoxia episodes. The northern Adriatic Sea was phosphorus depleted with respect to C and N availability. This fact confirms the importance of mixing with deep-sea water for P supply to biological processes on the whole. Despite the abundant prokaryotic biomass, the microbial food web was less efficient in organic C production than phytoplankton. In the upper layer, the carbon produced by primary production exceeded the fraction respired by planktonic community smaller than 200 µm. On the contrary, respiration processes prevailed in the water column below the pycnocline. The carbon budget also proved that the northern Adriatic Sea can be an effective sink for atmospheric CO2 throughout the entire winter season.

  19. Soft-agar-coated filter method for early detection of viable and thermostable direct hemolysin (TDH)- or TDH-related hemolysin-producing Vibrio parahaemolyticus in seafood.

    Science.gov (United States)

    Hayashi, Sachiko; Okura, Masatoshi; Osawa, Ro

    2006-07-01

    A novel method for detecting viable and thermostable direct hemolysin (TDH)-producing or TDH-related hemolysin (TRH)-producing Vibrio parahaemolyticus in seafood was developed. The method involved (i) enrichment culture, selective for viable, motile cells penetrating a soft-agar-coated filter paper, and (ii) a multiplex PCR assay targeting both the TDH gene (tdh) and TRH gene (trh) following DNase pretreatment on the test culture to eradicate any incidental DNAs that might have been released from dead cells of tdh- or trh-positive (tdh+ trh+) strains and penetrated the agar-coated filter. A set of preliminary laboratory tests performed on 190 ml of enrichment culture that had been inoculated simultaneously with ca. 100 viable cells of a strain of tdh+ trh+ V. parahaemolyticus and dense populations of a viable strain of tdh- and trh-negative V. parahaemolyticus or Vibrio alginolyticus indicated that the method detected the presence of viable tdh+ trh+ strains. Another set of preliminary tests on 190 ml of enrichment culture that had been initially inoculated with a large number of dead cells of the tdh+ trh+ strain together with dense populations of the tdh- and trh-negative strains confirmed that the method did not yield any false-positive results. Subsequent quasi-field tests using various seafood samples (ca. 20 g), each of which was experimentally contaminated with either or both hemolysin-producing strains at an initial density of ca. 5 to 10 viable cells per gram, demonstrated that contamination could be detected within 2 working days.

  20. Benthic fluxes of mercury during redox changes in pristine coastal marine sediments from the Gulf of Trieste (northern Adriatic Sea)

    Energy Technology Data Exchange (ETDEWEB)

    Koron, Neza [National Institute of Biology, Piran (Slovenia). Marine Biological Section; Faganeli, Jadran [National Institute of Biology, Piran (Slovenia). Marine Biological Section; Jozef Stefan Institute, Ljubljana (Slovenia). Dept. of Environmental Sciences

    2012-12-15

    Purpose: The Gulf of Trieste (northern Adriatic Sea) is an example of a coastal environment contaminated with mercury (Hg). Contamination is a consequence of nearly 500 years of activity at the Idrija Mine (western Slovenia), which is the second largest Hg mine in the world. Oxygen depletion can be common in the Gulf of Trieste due to late summer stratification of the water column and accumulation of labile organic matter. Since changing redox conditions can have an impact on Hg transformations, we studied the effect of oxygen depletion, in parallel with sulphide, iron (Fe), manganese (Mn), fluorescent dissolved organic matter (FDOM) and nitrogen (N) and phosphorus (P) availability, on total Hg and methylmercury (MeHg) fluxes from sediments. Materials and methods: Pore water concentrations and benthic fluxes of total dissolved Hg and MeHg were studied in situ and in microcosm laboratory experiments using flux chambers encompassing three different stages: oxic, anoxic and reoxidation. Results and discussion: Our experiments showed that in the oxic stage there were small effluxes of MeHg to the water column, which increased in the anoxic stage and dropped rapidly in a subsequent reoxic stage, showing influx. Our results support the hypothesis that MeHg desorption from reduced metal hydroxides under anoxic conditions, and co-precipitation with Fe-oxides and MeHg demethylation in the reoxidation stage, may play a major role in determining MeHg benthic fluxes. For Hg and MeHg, it appears that there is little relationship between their pore water distribution and flux and that of FDOM, i.e. humics. Conclusions: The results indicate that there was no significant difference in Hg and MeHg pore water levels and their benthic fluxes between the contaminated northern and central parts of the Gulf of Trieste and the pristine southern part. This suggests that shallow and stratified coastal marine environments, in general, represent areas with a risk of high benthic release of

  1. Mercury in the sediments of the Marano and Grado Lagoon (northern Adriatic Sea): Sources, distribution and speciation

    Science.gov (United States)

    Acquavita, Alessandro; Covelli, Stefano; Emili, Andrea; Berto, Daniela; Faganeli, Jadran; Giani, Michele; Horvat, Milena; Koron, Neža; Rampazzo, Federico

    2012-11-01

    The existence of mining tailings in Idrija (Slovenia) and their subsequent transportation via the Isonzo River has been the primary source of mercury (Hg) in the northern Adriatic Sea for almost 500 years, making the Gulf of Trieste and the adjacent Marano and Grado Lagoon two of the most contaminated marine areas in the world. A further, more recent, contribution of Hg has been added by the operation of a chlor-alkali plant (CAP) located in the drainage basin flowing into the Lagoon. On the basis of previous research, as well as new data obtained from the "MIRACLE" project (Mercury Interdisciplinary Research for Appropriate Clam farming in a Lagoon Environment), the spatial distribution of Hg and its relationships with methylmercury (MeHg), organic matter and several geochemical parameters in surface sediments were investigated. The predominant and long-term impacts of the cinnabar-rich Isonzo River particulate matter in the Lagoon surface sediments are evident and confirmed by a decreasing concentration gradient from east (>11 μg g-1) to west (0.7 μg g-1). Hg originated from the CAP is only significant in the central sector of the Lagoon. Hg is primarily associated with fine-grained sediments (production. In the context of the potential hazard of Hg and MeHg accumulation in reared clams, the choice of a site for the extension of farming activities inside the Marano and Grado Lagoon is dependent on several factors and cannot be decided solely on the basis of the total Hg content in the sediment.

  2. Burried MIS 5 abrasion platforms in the Bay of Koper (Gulf of Trieste, Northern Adriatic) confirm long-term subsidence of the Northern Adriatic region

    Science.gov (United States)

    Trobec, Ana; Šmuc, Andrej; Poglajen, Sašo; Vrabec, Marko

    2016-04-01

    The youngest seafloor sediments of the Gulf of Trieste (Northern Adriatic) are represented by an up to several 100 meters thick succession of Pliocene to Quaternary continental and shallow-marine deposits recording numerous transgressive-regressive cycles. These sediments are separated from older lithologies (mainly Eocene flysch) by an erosional unconformity. Previous geophysical campaigns conducted in the Italian part of the Gulf of Trieste revealed a complex undulating morphology of the unconformity characterised by numerous morphological steps in the flysch appearing between 40 and 200 m below sea level. From correlation with onshore well data from the Friuli and Veneto area it is assumed that the highest system of these unconformities located at approximately 40 mbsl represents a marine abrasion platform formed during the MIS 5 period sea-level highstand. We present the first observations of these abrasion platforms in the Bay of Koper in the southern (Slovenian) part of the Gulf of Trieste. A series of perpendicular sub-bottom sonar profiles with a spacing of 250-500 meters was acquired in the Bay of Koper between 2009 and 2012 with the Innomar parametric sediment echo sounder SES-2000. Along the northern coast of the bay several acoustic facies were resolved, including the top erosional unconformity surface of the flysch. On this surface we located platforms at 35 ms (platform A), 40 ms (platform B) and 50 ms (platform C) of two-way-travel time. The top of abrasion platform B coincides with the top of a sediment progradational wedge which overlies abrasion platform C. No progradational wedge is developed at the top of platform A. Due to signal attenuation and multiples sub-bottom profiles could not be interpreted below 53 ms TWT time. We used a sound velocity of 1650 m/s for the time to depth conversion, which places the platforms at the depth of 28, 33 and 41 mbsl, respectively. Assuming that the abrasion platforms are a remnant of the MIS 5 highstand, this

  3. The New Man and the Sea: Climate Change Perceptions and Sustainable Seafood Preferences of Florida Reef Anglers

    Directory of Open Access Journals (Sweden)

    James W. Harper

    2015-05-01

    Full Text Available Florida Reef stakeholders have downplayed the role of anthropogenic climate change while recognizing the reef system’s degradation. With an emphasis on recreational anglers, a survey using contingent valuation methods investigated stakeholders’ attitudes about the Florida Reef, climate change, and willingness to pay for sustainable and local seafood. Angst expressed about acidification and other climate change effects represents a recent shift of opinion. Supermajorities were willing to pay premiums for sustainably harvested and especially local seafood. Regression analysis revealed trust in seafood labels, travel to coral reefs, political orientation, place of birth, and motorboat use as strong, direct predictors of shopping behavior, age and environmental concerns as moderately influential, and income and education as surprisingly poor predictors. Distrust of authority may motivate some stakeholders, but new attitudes about climate change and the high desirability of local seafood offer potential for renewed regional engagement and market-based incentives for sustainability.

  4. Down-core changes in molluscan death assemblages at Panzano Bay, an impacted area in the northern Adriatic Sea

    Science.gov (United States)

    Haselmair, Alexandra; Gallmetzer, Ivo; Stachowitsch, Michael; Tomasovych, Adam; Zuschin, Martin

    2016-04-01

    We use a historical ecology approach to shed light on the environmental history of the northern Adriatic Sea over the last hundreds to thousands of years. We focus on down-core changes in molluscan death assemblages, which serve as proxies for ecological shifts over time. The northern Adriatic Sea is particularly suited to study ecosystem modification under human pressure because it is among the most degraded marine ecosystems worldwide. We chose a sampling station in Panzano Bay, close the Isonzo River mouth and not far from the major industrial harbours of Trieste (Italy) and Koper (Slovenia), and traced down-core changes in molluscan community structure in correlation to major anthropogenic impacts that occurred here during the last centuries. Five sediment cores (1.5 m in length and diameters of 90 and 160 mm) were taken at a water depth of 12 m. We analysed grain size composition, the concentration of heavy metals and organic pollutants, and radiometrically dated the sediment using 210Pb. Furthermore, we dated shells of the abundant bivalve species Corbula gibba using 14C calibrated amino acid-racemisation (AAR). The whole molluscan community in the cores was analysed for species composition, abundance, taxonomic similarity, evidence for ecological interactions (i.e., frequencies of drilling predation) and taphonomic conditions of shells. The granulometric analysis shows that silt and clay dominate equally throughout the cores. Radiometric sediment dating revealed an average sedimentation rate of 2.5 mm/yr during the last 120 years. Shell dating points to a comparable overall core age, with only a few shell specimens being older than 500 years in the deepest core layer. In total, 10,452 mollusc individuals were analysed and 104 species identified. The most abundant bivalve species are Kurtiella bidentata, Corbula gibba and Abra nitida. Turritella communis and Nassarius pygmaeus are the most frequent gastropod species. Down-core changes in species composition

  5. Norwegian salmon goes to market: The case of the Austevoll seafood cluster

    DEFF Research Database (Denmark)

    Hovgaard, Gestur

    2006-01-01

    This paper examines the impact of the globalisation of the farmed salmon comodity chain upon farmed salmon production in the western Norwegian municipality of Austevoll. On the basis of field research conducted in 2002 and 2003, we conclude that salmon farming in Austevoll has responded to the ch...... with suggestions for incorporating the literatues on global food chains and industrial clusters in the study of seafood production and global markets....... to the challenges of 'buyer-driven' food chains by virtue of its history as a seafood cluster. Despite this era of 'homogenised globalisation'. Nevertheless, recent changes in the global farmed salmon supply chain may result in the imposition of vertical relations in the Austevoll cluster. We conclude...

  6. Demographic Factors Influencing Consumer Preferences of Seafood Consumption: Central Anatolia Region

    Directory of Open Access Journals (Sweden)

    Osman Orkan Özer

    2016-06-01

    Full Text Available This study was carried out in order to analyze seafood consumption level of consumers in Central Anatolia Region (Province Ankara and their consumption behavior. Proportional sampling method was used in determining sample size and sample size was determined as 167. Data were collected from randomly chosen individuals with face-to-face interviews. As a result of study, in order to determine possible effects of socio-economic properties of consumers on seafood consumption, CHAID analysis which is one of the decision tree analyses was used. According to the results of analysis; it can be said that dependent variables of income, education and age have effect on attitude and behavior of consumers while gender have no effect on consumption behaviors.

  7. Dietary exposure to perfluoroalkyl acids of specific French adult sub-populations: High seafood consumers, high freshwater fish consumers and pregnant women

    Energy Technology Data Exchange (ETDEWEB)

    Yamada, A., E-mail: ami.s.yamada@gmail.com [Risk Assessment Directorate, French Agency for Food, Environmental and Occupational Health and Safety (ANSES), 27-31 avenue du Général Leclerc, Maisons-Alfort 94701 (France); Bemrah, N., E-mail: nawel.bemrah@anses.fr [Risk Assessment Directorate, French Agency for Food, Environmental and Occupational Health and Safety (ANSES), 27-31 avenue du Général Leclerc, Maisons-Alfort 94701 (France); Veyrand, B., E-mail: bruno.veyrand@oniris-nantes.fr [LUNAM Université, Oniris, Laboratoire d' Etude des Résidus et Contaminants dans les Aliments (LABERCA), USC INRA 1329, Nantes 44307 (France); Pollono, C., E-mail: charles.pollono@oniris-nantes.fr [LUNAM Université, Oniris, Laboratoire d' Etude des Résidus et Contaminants dans les Aliments (LABERCA), USC INRA 1329, Nantes 44307 (France); Merlo, M., E-mail: mathilde.merlo@anses.fr [Risk Assessment Directorate, French Agency for Food, Environmental and Occupational Health and Safety (ANSES), 27-31 avenue du Général Leclerc, Maisons-Alfort 94701 (France); Desvignes, V., E-mail: virginie.desvignes@anses.fr [Risk Assessment Directorate, French Agency for Food, Environmental and Occupational Health and Safety (ANSES), 27-31 avenue du Général Leclerc, Maisons-Alfort 94701 (France); Sirot, V., E-mail: sirotv@gmail.com [Risk Assessment Directorate, French Agency for Food, Environmental and Occupational Health and Safety (ANSES), 27-31 avenue du Général Leclerc, Maisons-Alfort 94701 (France); and others

    2014-09-01

    Perfluoroalkyl acids (PFAAs) are globally found in various media, including food and especially fishery products. In the present study, the dietary exposure to 15 perfluoroalkyl acids was assessed for 3 French adult populations, namely high seafood consumers, high freshwater fish consumers, and pregnant women. Purified food extracts were analysed by LC–MS/MS and PFBA, PFPA, PFHxA, PFHpA, PFOA, PFNA, PFDA, PFUnA, PFTrDA, PFTeDA, PFBS, PFHxS, PFHpS, PFOS and PFDS were monitored and quantified according to the isotope dilution principle. Under lower bound (LB) hypothesis (i.e. contamination values < LOD considered as 0), high freshwater fish consumers appear as the most exposed to PFOS (7.5 ng.kg{sup −1} bw.d{sup −1}), PFUnA (1.3 ng.kg{sup −1} bw.d{sup −1}), PFDA (0.4 ng.kg{sup −1} bw.d{sup −1}) and PFHpS (0.03 ng.kg{sup −1} bw.d{sup −1}) while high seafood consumers appear as the most exposed to PFOA (1.2 ng.kg{sup −1} bw.d{sup −1}), PFNA (0.2 ng.kg{sup −1} bw.d{sup −1}) and PFHxS (0.06 ng.kg{sup −1} bw.d{sup −1}). For all considered populations, the major exposure contributors are fish, seafood and water under LB hypothesis, while dairy products, bread and crispbread are the main contributors under upper bound (UB) hypothesis. Besides this food exposure assessment, further studies are needed to assess the more global PFAA exposure, taking into account indoor and outdoor air, dust and cutaneous contact, which could be other important contributors for this particular class of chemicals. - Highlights: • The dietary exposure was estimated for 15 perfluoroalkyl acids. • Despite the overestimation, the FFQ remains useful to evaluate the whole diet. • The high fish consumers are the most dietary exposed population. • Fishery products are the main exposure contributors under LB hypothesis.

  8. Microbiological and sensorial quality assessment of ready-to-cook seafood products packaged under modified atmosphere.

    Science.gov (United States)

    Speranza, B; Corbo, M R; Conte, A; Sinigaglia, M; Del Nobile, M A

    2009-01-01

    The effects of modified atmosphere packaging (MAP) (30:40:30 O(2):CO(2):N(2) and 5:95 O(2):CO(2)) on the quality of 4 ready-to-cook seafood products were studied. In particular, the investigation was carried out on hake fillets, yellow gurnard fillets, chub mackerel fillets, and entire eviscerated cuttlefish. Quality assessment was based on microbiological and sensorial indices determination. Both packaging gas mixtures contributed to a considerable slowing down of the microbial and sensorial quality loss of the investigated seafood products. Results showed that sensorial quality was the subindex that limited their shelf life. In fact, based primarily on microbiological results, samples under MAP remained acceptable up to the end of storage (that is, 14 d), regardless of fish specie. On the other hand, results from sensory analyses showed that chub mackerel fillets in MAP were acceptable up to the 6th storage d, whilst hake fillets, yellow gurnard fillets, and entire cuttlefish became unacceptable after 10 to 11 d. However, compared to control samples, an increase in the sensorial shelf life of MAP samples (ranging from about 95% to 250%) was always recorded. Practical Application: Modified atmosphere packaging (MAP) is an inexpensive and uncomplicated method of extending shelf life of packed seafood. It could gain great attention from the fish industrial sector due to the fact that MAP is a practical and economic technique, realizable by small technical expedients. Moreover, there is great attention from the food industry and retailers to react to the growing demand for convenience food, thus promoting an increase in the assortments of ready-to-cook seafood products.

  9. Quantifying the Seafood Consumption Patterns of Recreational Anglers in Charleston and Berkeley Counties, South Carolina.

    Science.gov (United States)

    Perkinson, Matthew T; Faith, Trevor D; Vahey, Grace M; Vena, John E; Williams, Edith M

    2016-01-01

    This study was designed to provide self-reported data on the frequency of fish consumption and shellfish consumption in Charleston and Berkeley (CB) counties, South Carolina. While commercial fishing and recreational fishing have played an important role in the culture and history of the area, information on the specific patterns of consumption by recreational anglers has been previously unavailable. The pilot data presented here will help determine the feasibility of a large-scale survey of seafood consumption in coastal South Carolina. The study's sampling frame consisted of CB county anglers who had purchased a recreational saltwater fishing license for the 2005/2006 year with oversampling in North Charleston. Survey recipients were asked to provide information on fish consumption and shellfish consumption, general angling habits, perception of water and fishing quality, and demographics. Of the 2500 individuals who were sent questionnaires, about one-fourth responded. Respondents were generally white, middle, or upper class and highly educated. The majority fished by boat and most often ate flounder, spotted sea trout, and red drum. Most respondents ate shrimp several times a month and also supplemented their recreational catch with seafood purchased from grocery stores, markets, and restaurants. Almost all respondents had eaten some seafood in the last year, and more than one-fourth ate seafood twice a week or more. Most anglers responded positively about the area's fishing and water qualities, but many referred to areas where they would hesitate to eat their catch. Further research may need to incorporate direct distribution of surveys to underrepresented groups and financial incentives to encompass a more diverse population of anglers.

  10. Optimization of Process Parameters for Litopenaeus vannamei Seafood Sauce using Response Surface Methodology

    OpenAIRE

    Xinyue Li; Jianfeng Sun; Xiaopeng Cui; Jie Wang

    2014-01-01

    In this study, in order to determine the optimum formulation of Litopenaeus vannamei seafood sauce, Response Surface Methodology (RSM) was employed to investigate the effects of contents of thick broad-bean sauce, sweet soybean paste and Shacha sauce on the sensory quality. Statistical analysis of the results showed that the data were adequately fitted into a second-order polynomial model. The independent parameters of contents of thick broad-bean sauce, sweet soybean paste and the quadratics...

  11. THE LEGISLATIVE CONDITIONS IN EUROPEAN UNION IMPORT FOR SEAFOOD AND OTHER FISHERY PRODUCTS

    Directory of Open Access Journals (Sweden)

    S. STANCIU

    2013-12-01

    Full Text Available The European Union is by far the world’s biggest importer of fish, seafood andaquaculture products. Import rules for these products are harmonized, meaning thatthe same rules apply in all EU countries. For non-EU countries the EuropeanCommission is the negotiating partner that defines import conditions andcertification requirements. Also, for most countries with existing trade, the EuropeanCommission negotiates on behalf of the 27 Member States.

  12. Late Quaternary transgressive large dunes on the sediment-starved Adriatic shelf

    Science.gov (United States)

    Correggiari, A.; Field, M.E.; Trincardi, F.

    1996-01-01

    The Adriatic epicontinental basin is a low-gradient shelf where the late-Quaternary transgressive systems tract (TST) is composed of thin parasequences of backbarrier, shoreface and offshore deposits. The facies and internal architecture of the late-Quaternary TST in the Adriatic epicontinental basin changed consistently from early transgression to late transgression reflecting: (1) fluctuations in the balance between sediment supply and accommodation increase, and (2) a progressive intensification of the oceanographic regime, driven by the transgressive widening of the basin to as much as seven times its lowstand extent. One of the consequences of this trend is that high-energy marine bedforms such as sand ridges and sand waves characterize only areas that were flooded close to the end of the late-Quaternary sea-level rise, when the wind fetch was maximum and bigger waves and stronger storm currents could form. We studied the morphology, sediment composition and sequence-stratigraphical setting of a field of asymmetric bedforms (typically 3 m high and 600 m in wavelength) in 20-24 m water depth offshore the Venice Lagoon in the sediment-starved North Adriatic shelf. The sand that forms these large dunes derived from a drowned transgressive coastal deposit reworked by marine processes. Early cementation took place over most of the dune crests limiting their activity and preventing their destruction. Both the formation and deactivation of this field of sand dunes occurred over a short time interval close to the turn-around point that separates the late-Quaternary sea-level rise and the following highstand and reflect rapid changes in the oceanographic regime of the basin.

  13. The Adriatic Sea ecosystem seasonal cycle: Validation of a three-dimensional numerical model

    Science.gov (United States)

    Polimene, L.; Pinardi, N.; Zavatarelli, M.; Colella, S.

    2006-03-01

    A three-dimensional coupled biogeochemical-circulation numerical model was implemented in the Adriatic Sea. The biogeochemical part of the model is a development of the European Seas Regional Ecosystem Model (ERSEM II), while the circulation model is the Adriatic Sea implementation of the Princeton Ocean Model (POM). The model was run under climatological monthly varying atmospheric and river runoff forcing in order to reproduce seasonal circulation and biochemical processes. Simulated chlorophyll, nutrient, and plankton biomass and distributions were analyzed and compared with the data coming from a historic in situ data set and a newly constructed chlorophyll climatological data set from SeaWiFS. Model reproduction of the chlorophyll seasonal cycle is, at least qualitatively, in good agreement both with the remote sensing and the in situ data. However, larger production than observed is simulated during the late winter and spring, probably due to inadequate knowledge of the nutrient inputs. Comparison between simulated nutrients and observations shows a general underestimation for orthophosphate and orthosilicate, while nitrate is mostly overestimated. The shape of the nutrient-simulated profiles is in qualitatively good agreement with observations in the central and southern part of the basin. The analysis of the ratio between the large (>20 μm) and small (<20 μm) phytoplankton biomass and between the bacteria and phytoplankton biomass shows that the Western Adriatic Coastal Current is not only a physical frontal structure but also an ecosystem front, where larger phytoplankton grow on the coastal side while smaller ones are present offshore where the microbial loop is the dominant food web.

  14. Role of Recruitment Processes in Structuring Coralligenous Benthic Assemblages in the Northern Adriatic Continental Shelf

    Science.gov (United States)

    Abbiati, Marco

    2016-01-01

    Coralligenous biogenic reefs are among the most diverse marine habitats in the Mediterranean Sea. The northern Adriatic mesophotic coralligenous outcrops host very rich and diverse epibenthic assemblages. Several studies quantified the low temporal variability and high spatial heterogeneity of these habitats, while processes driving structuring and differentiation are still poorly understood. To shed light on these processes, temporal and spatial patterns of colonisation were investigated using travertine tiles deployed on three coralligenous outcrops, corresponding to the main typologies of benthic assemblages described in previous studies. Three years after deployment, assemblages colonising travertine tiles resembled the differentiation among sites revealed by the natural assemblages in terms of major ecological groups. Processes structuring and maintaining species diversity have been explored. Pioneer species with high reproduction rate, long distance larval dispersal and fast growth (e.g. the serpulid polychaete Spirobranchus triqueter and the bivalve Anomia ephippium), were the most abundant in the early stages of recruitment on the two outcrops further away from the coast and with lower sedimentation. Their success may vary according to larval availability and environmental conditions (e.g., sedimentation rates). At these sites early-stage lasted 10–12 months, during which even species from natural substrates began colonising tiles by settlement of planktonic propagules (e.g., encrusting calcareous Rhodophyta) and lateral encroachment (e.g., sponges and ascidians). On coastal outcrop, exposed to a higher sedimentation rates, tiles were colonised by fast-growing algal turfs. Resilience of northern Adriatic coralligenous assemblages, and maintenance of their diversity, appeared largely entrusted to asexual reproduction. Exploring the mechanisms that underlie the formation and maintenance of the species diversity is crucial to improve our understanding of

  15. Macro- and megafauna recorded in the submarine Bari Canyon (southern Adriatic, Mediterranean Sea using different tools

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    G. D'ONGHIA

    2015-01-01

    Full Text Available Macro- and megafauna were recorded in the submarine Bari Canyon (southern Adriatic Sea, Mediterranean Sea during an oceanographic cruise carried out in May-June 2012 and an experimental fishing survey conducted in November 2013. During the former, a total of 20 benthic samples were taken using a Van Veen grab at depths between 268 and 770 m and 4 deployments of a baited lander, for about 43 hours of video records, were carried out at depths between 443 and 788 m. During the latter, 8 longline fishing operations were conducted from 338 down to 612 m. Eighty-five living benthic and benthopelagic species were recorded: 29 Porifera, 1 Cnidaria, 2 Mollusca, 11 Annelida, 1 Arthropoda, 19 Bryozoa, 3 Echinodermata and 19 Chordata. A total of 51 species are new records for the Bari Canyon, 29 new records for the Adriatic Sea. Among the Porifera Cerbaris curvispiculifer is a new addition for the Italian Sponge Fauna. The first certain record of living specimens for the bryozoan Crisia tenella longinodata is reported. A total of 6 Mediterranean endemic species have been identified: 4 Porifera and 2 Annelida. The bathymetric range of some species has been extended. New information acquired for deep sea species confirms their importance in the structure of cold-water coral communities. This study has updated the knowledge on the biodiversity of the Adriatic Sea, as well as of the Bari Canyon in particular, one of the sites designated as “jewels of the Mediterranean” for which urgent conservation measures are needed.

  16. Towards integrated assessment of the northern Adriatic Sea sediment budget using remote sensing

    Science.gov (United States)

    Taramelli, A.; Filipponi, F.; Valentini, E.; Zucca, F.; Gutierrez, O. Q.; Liberti, L.; Cordella, M.

    2014-12-01

    Understanding the factors influencing sediment fluxes is a key issue to interpret the evolution of coastal sedimentation under natural and human impact and relevant for the natural resources management. Despite river plumes represent one of the major gain in sedimentary budget of littoral cells, knowledge of factors influencing complex behavior of coastal plumes, like river discharge characteristics, wind stress and hydro-climatic variables, has not been yet fully investigated. Use of Earth Observation data allows the identification of spatial and temporal variations of suspended sediments related to river runoff, seafloor erosion, sediment transport and deposition processes. Objective of the study is to investigate sediment fluxes in northern Adriatic Sea by linking suspended sediment patterns of coastal plumes to hydrologic and climatic forcing regulating the sedimentary cell budget and geomorphological evolution in coastal systems and continental shelf waters. Analysis of Total Suspended Matter (TSM) product, derived from 2002-2012 MERIS time series, was done to map changes in spatial and temporal dimension of suspended sediments, focusing on turbid plume waters and intense wind stress conditions. From the generated multi temporal TSM maps, dispersal patterns of major freshwater runoff plumes in northern Adriatic Sea were evaluated through spatial variability of coastal plumes shape and extent. Additionally, sediment supply from river distributary mouths was estimated from TSM and correlated with river discharge rates, wind field and wave field through time. Spatial based methodology has been developed to identify events of wave-generated resuspension of sediments, which cause variation in water column turbidity, occurring during intense wind stress and extreme metocean conditions, especially in the winter period. The identified resuspension events were qualitatively described and compared with to hydro-climatic variables. The identification of spatial and

  17. Prevalence and antimicrobial susceptibilities of Vibrio, salmonella, and Aeromonas isolates from various uncooked seafoods in Thailand.

    Science.gov (United States)

    Woodring, Joseph; Srijan, Apichai; Puripunyakom, Paksathorn; Oransathid, Wilawan; Wongstitwilairoong, Boonchai; Mason, Carl

    2012-01-01

    Uncooked seafood samples were collected from open markets and supermarkets in Bangkok, Thailand, and were examined for the presence of Vibrio, Salmonella, and Aeromonas species from January to February 2008. From 120 samples, 272 bacterial isolates were identified through biochemical testing. Of all sea bass, shrimp, oyster, and blood cockle samples (30 of each) that were processed for culture, 114 (95%) samples had at least one detectable isolate of Vibrio, Salmonella, or Aeromonas, leaving only 6 (5%) samples free of them. All oyster sample (100%) had at least one pathogen, followed by sea bass (97%), blood cockles (97%), and shrimp (90%). Overall, 111 (92%) of all samples had detectable Vibrio spp., 32 (27%) had detectable Aeromonas spp., and 25 (21%) had detectable Salmonella enterica. There was no overall difference between positive samples collected from fresh markets versus supermarkets (relative risk, 0.97; 95% CI, 0.89 to 1.05). Resistance to ampicillin among isolated pathogens was relatively high (56%), while resistance to 12 other antibiotics, including azithromycin, ciprofloxacin, and trimethoprim-sulfamethoxazole, was relatively low (0, 0, and 3%, respectively). Study results indicate that uncooked seafood in Bangkok, Thailand, commonly harbors enteric pathogens and that consumption of uncooked seafood should be avoided to reduce foodborne illnesses.

  18. Australian seafood compositional profiles: A pilot study. Vitamin D and mercury content.

    Science.gov (United States)

    Padula, David; Greenfield, Heather; Cunningham, Judy; Kiermeier, Andreas; McLeod, Catherine

    2016-02-15

    Given the scarcity of comprehensive nutritional data for Australia's >400 commercially produced seafood species a pilot study was undertaken to collect and analyse 22 species of wild and aquaculture seafood in order to develop a model for future comprehensive surveys. The species analysed were: Atlantic salmon, Australian sardine, prawn (six species), barramundi, abalone (three species), blue sprat, burrowing blackfish, gummy shark, oyster (four species), ocean trout and yellowtail kingfish. The analyses undertaken in this pilot study were: moisture, protein, total fat, cholesterol, fatty acids, vitamin C, vitamins A and D, and 21 mineral elements (including total mercury and methyl mercury). The data reported here are for vitamin D and mercury only. Comprehensive data have already been published elsewhere. Issues identified that should be addressed prior to undertaking a more extensive and representative study of the remaining major edible commercial Australian seafood species include: choice of samples and nutrients for analysis, facilities for sample handling and storage, data management and scrutiny, and laboratory quality control.

  19. Preliminarily comparison of nutritional composition of some fresh and processed seafood.

    Science.gov (United States)

    Aberoumand, Ali

    2012-10-01

    Processing made fish less susceptible to spoilage. Fish are rich in protein content but the protein content is reduced with processing gave a better result when long-time preservation was carried out. Aim of this study was comparison of proximate analysis of some fresh and processed seafoods. Raw materials and processed seafoods (canned mackerel tuna, frozen Sea-Bream and Pressed caviar) were obtained from different firms and analyzed. Analysis carried out according AOAC methods. Moisture, protein and fat values of tuna fish were estimated to be 51, 23.9 and 21.4%, respectively. In this study, moisture content of pressed caviar was 36%, protein content was 34.4% and fat content was 16.7%, carbohydrate and energy values were 4.9% and 316 kcal/100 g, respectively. Pressed and smoked seafoods contained lower amount of moisture but higher amounts of the other components than raw materials (p canning with water, all processing technologies decreased the moisture content but increased energy values (p foods that was produced in Iran. Since fishes are consumed as a major protein source in food, it is very important that the protein content should not be compromised during table preparation.

  20. Survey into the seafood consumption preferences and patterns in the portuguese population. Gender and regional variability.

    Science.gov (United States)

    Cardoso, Carlos; Lourenço, Helena; Costa, Sara; Gonçalves, Susana; Nunes, Maria Leonor

    2013-05-01

    With the purpose of achieving a deeper knowledge of one of the most important seafood markets in Europe, a survey into the seafood consumption preferences and patterns in the Portuguese population was carried out. A thorough, comprehensive, and simple questionnaire was developed. Consumers were asked to state their preferences towards fish products, their consumption frequencies, the average meal portion, and the usual culinary treatments. Respondents provided personal data: gender, age, geographical location, education level, weight, height, and health condition. This paper presents the first part of the study's results, focusing mainly on the gender and regional variables. Portuguese consumers prefer wild to cultured fish as well as fat to lean fish. Chilled fish is preferred over frozen, salted/dried, canned, and smoked fish, being the latter the least preferred. Soaked cod, hake, and canned tuna are the most eaten seafood products. Men prefer to a greater extent wild and smoked fish. Men consume more cephalopods and sardine and women eat more frequently hake, pink cusk-eel, and redfish. Coastal populations prefer wild fish. Algarve (southern Portugal) consumers exhibit a stronger tendency to wild and whole fish and consume more sardine and sole. Madeira archipelago consumers are particularly fond of black scabbard fish.

  1. Pathogenetic characterization of Vibrio parahaemolyticus isolates from clinical and seafood sources.

    Science.gov (United States)

    Vongxay, Khamphouth; Wang, Shuna; Zhang, Xiaofeng; Wu, Beibei; Hu, Hongxia; Pan, Zijiang; Chen, Suyun; Fang, Weihuan

    2008-08-15

    A total of 216 Vibrio parahaemolyticus isolates from seafood and clinical samples in eastern China were investigated for their hemolytic and urea-producing phenotypes, presence of putative virulence genes tdh and trh. Twenty-one clinical isolates (84%, 21/25) and 3 seafood isolates (1.57%, 3/191) were tdh-positive while only 3 clinical isolates (12%) and 7 seafood isolates (3.66%) were positive for trh gene. We further examined the pathogenicity of selected V. parahaemolyticus isolates in in vitro and in vivo systems. The clinical isolates were apparently more enteropathogenic (74.26 per thousand vs 62.07 per thousand expressed as intestine/body weight ratio, Ptdh-positive V. parahaemolyticus isolates were of higher enteropathogenicity (Ptdh-negative isolates. The tdh-positive isolates were generally more cytotoxic and adhesive to the cultured cell lines as well. From the in vitro and in vivo pathogenicity profiles, trh-positive isolates seemed to line between tdh-positive isolates and those without tdh and trh. There were two isolates H8 and H10 from clinical cases having moderate enteropathogenicity and virulence to mice, but were tdh-negative yet trh-positive. These results seem to suggest that hemolysins TDH and/or TRH may not be necessarily the only virulence factors of pathogenic V. parahaemolyticus isolates.

  2. Heavy Metals in Seafood and Farm Produce from Uyo, Nigeria; Levels and health implications

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    Orish E. Orisakwe

    2015-05-01

    Full Text Available Objectives: This study aimed to obtain representative data on the levels of heavy metals in seafood and farm produce consumed by the general population in Uyo, Akwa Ibom State, Nigeria, a region known for the exploration and exploitation of crude oil. Methods: In May 2012, 25 food items, including common types of seafood, cereals, root crops and vegetables, were purchased in Uyo or collected from farmland in the region. Dried samples were ground, digested and centrifuged. Levels of heavy metals (lead, cadmium, nickel, cobalt and chromium were analysed using an atomic absorption spectrophotometer. Average daily intake and target hazard quotients (THQ were estimated. Results: Eight food items (millet, maize, periwinkle, crayfish, stock fish, sabina fish, bonga fish and pumpkin leaf had THQ values over 1.0 for cadmium, indicating a potential health risk in their consumption. All other heavy metals had THQ values below 1.0, indicating insignificant health risks. The total THQ for the heavy metals ranged from 0.389 to 2.986. There were 14 items with total THQ values greater than 1.0, indicating potential health risks in their consumption. Conclusion: The regular consumption of certain types of farm produce and seafood available in Uyo, Akwa Ibom State, Nigeria, is likely adding to the body burden of heavy metals among those living in this region.

  3. Cadmium and lead in seafood from the Aratu Bay, Brazil and the human health risk assessment.

    Science.gov (United States)

    Silva da Araújo, Cecilia Freitas; Lopes, Mariângela Vieira; Vaz Ribeiro, Mirian Rocha; Porcino, Thiago Santos; Vaz Ribeiro, Amanda Santos; Rodrigues, Juliana Lima Gomes; do Prado Oliveira, Sérgio Soares; Menezes-Filho, José Antonio

    2016-04-01

    This study aimed to evaluate cadmium (Cd) and lead (Pb) levels in seafood and perform a risk assessment based on individual food consumption frequency of inhabitants of the Aratu Bay, Brazil. From December 2013 to November 2014, ready-to-market seafood, including fish [pititinga (Lile piquitinga) and small green eel (Gobionellus oceanicus)], mollusks [mussel (Mytella guyanensis) and oyster (Crassostrea rhizophorae)], and crustaceans [white shrimp (Litopenaeus schmitti) and blue crab (Callinectes exasperatus)], were purchased bimonthly from a local artisanal shellfish harvester. Metal levels were analyzed by graphite furnace atomic absorption spectrometry (GFAAS). Based on the volunteer’ seafood consumption, estimates of the non-carcinogenic target hazard quotients (THQs) were calculated. The annual concentrations (μg/g, w/w) of Cd were 0.007 (±0.001) in crustaceans, 0.001 (±0.0003) in fish, and 0.446 (±0.034) in mollusks. Lead levels were fish, and 0.111 (±0.009) in mollusks. All values were within the international guidelines. We observed that 90.9 % of the responders presented an average THQ < 1, which is classified as negligible risk; however, 9.1 % presented THQs between ≥1 and <9.9. These data are important to inform the community of the imminent exposure risk through communication strategies, with the purpose of minimizing exposure and, consequently, the health effects associated with it.

  4. Iron is an essential cause of fishy aftertaste formation in wine and seafood pairing.

    Science.gov (United States)

    Tamura, Takayuki; Taniguchi, Kiyoshi; Suzuki, Yumiko; Okubo, Toshiyuki; Takata, Ryoji; Konno, Tomonori

    2009-09-23

    Fishy aftertaste is sometimes perceived in wine with fish and seafood pairing. However, what component of wine clashes with seafood or what compound contributes to the unpleasant fishy aftertaste in the mouth remains an open problem. First, intensities of unpleasant fishy aftertaste of wine and dried scallop pairings were rated by sensory analysis. Second, components of the wines were analyzed. Strong positive correlations were found between the intensity of fishy aftertaste and the concentration of both total iron and ferrous ion. Moreover, the intensity of fishy aftertaste was increased by the addition of ferrous ion in model wine and suppressed by the chelation of ferrous ion in red wine. Third, potent volatile compounds of fishy aftertaste, such as hexanal, heptanal, 1-octen-3-one, (E,Z)-2,4-heptadienal, nonanal, and decanal, were determined by gas chromatography-olfactometry and gas chromatography-mass spectrometry in dried scallop soaked in red wine. The formations of these compounds depended on the dose of ferrous ion in the model wine. These results suggest that ferrous ion is a key compound of the formation of fishy aftertaste in wine and seafood pairing within the concentration range commonly found in wine.

  5. Investigation of the loss of byssus in Mytilus galloprovincialis from mussel farms in the Adriatic Sea.

    Science.gov (United States)

    Franchini, Antonella; Malagoli, Davide; Ottaviani, Enzo

    2005-10-01

    A fungal infection has been found in the mussel Mytilus galloprovincialis from Adriatic Sea mussel farms. The infection ultimately results in the loss of the byssus, with serious consequences for mussel farming yield. The pathogen provokes the progressive destruction of the foot muscles, also damaging related structures such as the intra-organism part of the byssus apparatus, resulting in loss of the thread component. The affected health status of the animal is also sustained by modifications in the digestive gland structure, ranging from hyperactivity to extreme cell death in the tubula. At present, the identity of the harmful fungus is unknown.

  6. The Adriatic-Ionian Macroregion in the Eurasian Socio-economic Future

    Directory of Open Access Journals (Sweden)

    Carlo Carboni

    2014-12-01

    Full Text Available This paper discusses the economic and social potential enabled by the Adriatic Ionian Macroregion (AIMr, characterized by a diffuse industrial pattern based on small and mediumsized enterprises, located in a European periphery, logistics and politics. The analyses show a diverse environment, made up of territories and states that move between vitality, modernization, economic backwardness and social inadequacy of infrastructure networks. In reference to the pillars identified by the EU, the ability to develop investments agreements with strategic political partnership between the states are the main instruments to achieve the objectives of modernizing the infrastructure and technology of this new political and economic realities.

  7. Sterol composition of the Adriatic Sea algae Ulva lactuca, Codium dichotomum, Cystoseira adriatica and Fucus virsoides

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    RADOMIR KAPETANOVIC

    2005-12-01

    Full Text Available The sterol composition of two green algae and two brown algae from the South Adriatic was determined. In the green alga Ulva lactuca, the principal sterols were cholesterol and isofucosterol. In the brown alga Cystoseira adriatica, the main sterols were cholesterol and stigmast-5-en-3ß-ol, while the characteristic sterol of the brown algae, fucosterol, was found only in low concentration. The sterol fractions of the green alga Codium dichotomum and the brown alga Fucus virsoides contained practically only one sterol each, comprising more than 90 % of the total sterols (clerosterol in the former and fucosterol in the latter.

  8. Validation of the 3M molecular detection system for the detection of listeria in meat, seafood, dairy, and retail environments.

    Science.gov (United States)

    Fortes, Esther D; David, John; Koeritzer, Bob; Wiedmann, Martin

    2013-05-01

    There is a continued need to develop improved rapid methods for detection of foodborne pathogens. The aim of this project was to evaluate the 3M Molecular Detection System (3M MDS), which uses isothermal DNA amplification, and the 3M Molecular Detection Assay Listeria using environmental samples obtained from retail delicatessens and meat, seafood, and dairy processing plants. Environmental sponge samples were tested for Listeria with the 3M MDS after 22 and 48 h of enrichment in 3M Modified Listeria Recovery Broth (3M mLRB); enrichments were also used for cultural detection of Listeria spp. Among 391 samples tested for Listeria, 74 were positive by both the 3M MDS and the cultural method, 310 were negative by both methods, 2 were positive by the 3M MDS and negative by the cultural method, and one sample was negative by the 3M MDS and positive by the cultural method. Four samples were removed from the sample set, prior to statistical analyses, due to potential cross-contamination during testing. Listeria isolates from positive samples represented L. monocytogenes, L. innocua, L. welshimeri, and L. seeligeri. Overall, the 3M MDS and culture-based detection after enrichment in 3M mLRB did not differ significantly (P < 0.05) with regard to the number of positive samples, when chi-square analyses were performed for (i) number of positive samples after 22 h, (ii) number of positive samples after 48 h, and (iii) number of positive samples after 22 and/or 48 h of enrichment in 3M mLRB. Among 288 sampling sites that were tested with duplicate sponges, 67 each tested positive with the 3M MDS and the traditional U.S. Food and Drug Administration Bacteriological Analytical Manual method, further supporting that the 3M MDS performs equivalently to traditional methods when used with environmental sponge samples.

  9. Study on seafood volatile profile characteristics during storage and its potential use for freshness evaluation by headspace solid phase microextraction coupled with gas chromatography-mass spectrometry.

    Science.gov (United States)

    Zhang, Zhuomin; Li, Gongke; Luo, Lin; Chen, Guonan

    2010-02-05

    Seafood volatile profile characteristics at different storage phases are various and can be used for freshness evaluation during storage. It is imperative to obtain the full volatile information prior to the further study of seafood volatile profile characteristics during storage. Also, the efficient data-processing method is another important factor for the interpretation of seafood volatile profile characteristics during storage and related potential volatile markers. In this work, a new analytical strategy, including the efficient sampling technique, sensitive detection and suitable data-processing method, for seafood freshness evaluation was developed based on the volatile profile characteristics during storage. First, the study of volatiles of seafood samples including razor clam, redspot swimming crab and prawn at different storage phases were conducted by headspace solid phase microextraction (HSSPME) followed by gas chromatography-mass spectrometry (GC-MS) detection. Then, seafood volatile profile characteristics at different storage phases were statistically interpreted by a combination data-processing method including normalization, principle component analysis (PCA) and common model strategy. The different seafood volatile profile characteristics and potential volatile markers were attempted to be distilled. The results tentatively suggested that the different seafood volatile profile characteristics during storage could reflect the transitional changing seafood freshness and provide more precise warning information for seafood spoilage during storage than any single chemical markers. This work developed an analytical method for study of seafood volatile profile characteristics and tentatively proposed a new idea of using seafood volatile profile characteristics during storage for the freshness evaluation from the point of view of analytical chemistry.

  10. Investigation on tsunami effects in the central Adriatic Sea during the last century – a contribution

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    A. Maramai

    2007-01-01

    Full Text Available In this work we present the result of a study aimed at examining the Italian earthquake sequences that occurred in the area of the central Adriatic sea with the purpose of understanding whether some of them were accompanied by tsunami effects. The motivation for this research was the update and enrichment of the Italian Tsunami Catalogue. The result was that evidence was found for two new cases of earthquake-induced tsunamis: these are the August 1916 Rimini and the October 1930 Ancona events. The bulk of the present research consisted in collecting all the available data on the earthquakes that affected the selected area in the past century and in identifying those potentially capable of generating tsunamis. During the study all the available material was gathered, which includes specific monographs and scientific papers, articles available in contemporary chronicles and in local and national newspapers. The final result of this research will improve our knowledge of the tsunamigenic activity of the central Adriatic sea and contribute to the assessment of the tsunami hazard and risk along these coasts, that especially in the peak season form one of the most densely populated areas of the Italian peninsula with flat and large beaches and water front resorts crowded of tourists.

  11. Bacterial diversity of polluted surface sediments in the northern Adriatic Sea.

    Science.gov (United States)

    Korlević, Marino; Zucko, Jurica; Dragić, Mirjana Najdek; Blažina, Maria; Pustijanac, Emina; Zeljko, Tanja Vojvoda; Gacesa, Ranko; Baranasic, Damir; Starcevic, Antonio; Diminic, Janko; Long, Paul F; Cullum, John; Hranueli, Daslav; Orlić, Sandi

    2015-05-01

    Samples were collected from sea sediments at seven sites in the northern Adriatic Sea that included six sites next to industrial complexes and one from a tourist site (recreational beach). The samples were assayed for alkanes and polycyclic aromatic hydrocarbons. The composition of the hydrocarbon samples suggested that industrial pollution was present in most cases. A sample from one site was also grown aerobically under crude oil enrichment in order to evaluate the response of indigenous bacterial populations to crude oil exposure. Analysis of 16S rRNA gene sequences showed varying microbial biodiversity depending on the level of pollution--ranging from low (200 detected genera) to high (1000+ genera) biodiversity, with lowest biodiversity observed in polluted samples. This indicated that there was considerable biodiversity in all sediment samples but it was severely restricted after exposure to crude oil selection pressure. Phylogenetic analysis of putative alkB genes showed high evolutionary diversity of the enzymes in the samples and suggested great potential for bioremediation and bioprospecting. The first systematic analysis of bacterial communities from sediments of the northern Adriatic Sea is presented, and it will provide a baseline assessment that may serve as a reference point for ecosystem changes and hydrocarbon degrading potential--a potential that could soon gain importance due to plans for oil exploitation in the area.

  12. PSP toxins profile in ascidian Microcosmus vulgaris (Heller, 1877) after human poisoning in Croatia (Adriatic Sea).

    Science.gov (United States)

    Roje-Busatto, Romana; Ujević, Ivana

    2014-03-01

    Toxins known to cause Paralytic Shellfish Poisoning (PSP) syndrome in humans that can have serious economic consequences for aquaculture were determined in ascidians of the genus Microcosmus. Significant concentrations of toxins were confirmed in all tested samples collected from the western coast of Istria Peninsula (Adriatic Sea, Croatia) when six people were poisoned following the consumption of fresh ascidians. Several species of bivalves that were under continuous monitoring had not accumulated PSP toxins although they were exposed to the same environmental conditions over the survey period. In the present study, HPLC-FLD with pre-column oxidation of PSP toxins has been carried out to provide evidence for the first human intoxication due to consumption of PSP toxic ascidians (Microcosmus vulgaris, Heller, 1877) harvested from the Adriatic Sea. Qualitative analysis established the presence of six PSP toxins: saxitoxin (STX), decarbamoylsaxitoxin (dcSTX), gonyautoxins 2 and 3 (GTX2,3), decarbamoylgonyautoxins 2 and 3 (dcGTX2,3), gonyautoxin 5 (GTX5) and N-sulfocarbamoylgonyautoxins 1 and 2 (C1,2), while quantitative analysis suggested STX and GTX2,3 as dominant toxin types and the ones that contribute the most to the overall toxicity of these samples with concentrations near the regulatory limit.

  13. CLIMATE CHANGES AND ADAPTATION POLICIES IN THE BALTIC AND THE ADRIATIC REGIONS

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    Branko Bosnjakovic

    2015-06-01

    Full Text Available This paper provides an overview of differences and similarities of the current climate changes in the Baltic and Adriatic coastal regions and appropriate adaptation policies on national, regional and European level. All reparian countries are at different stages of developing and implementing national adaptation strategies. The proposal for an overall BSR wide Climate Change Adaptation Strategy and Action Plan has been launched with the aim to recommend actions for climate change adaptation in the Baltic region. No similar agreement has been concluded yet on the protection of the semi-closed Adriatic Sea, the surface of which is about 1/2 of that of the Baltic Sea, and whose coastal region is home to about 1/4 of that of the Baltic Sea. The differences in the socio-economic characteristics and indicators may be partly responsible for the differring attitudes, actions and reporting concerning the adaptation to climate change, both between individual countries, as well as between the two regions as a whole

  14. A survey of the past earthquakesin the Eastern Adriatic (14th to early 19th century

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    P. Albini

    2004-06-01

    Full Text Available Focusing on the Eastern Adriatic region, from Zadar in the north to Corfu in the south, the background information supporting our knowledge of the seismicity in the time-span 14th to early 19th century is discussed from the point of view of the historical earthquake records. The late 19th century seismological compilations turn out to be those responsible for the uneven spatial and temporal distribution of seismicity suggested by current parametric earthquake catalogues. This awareness asked for a comprehensive reappraisal of the reliability and completeness of the available historical earthquake records. This task was addressed by retrieving in the original version the information already known, by putting the records in the historical context in which they were produced, and finally by sampling historical sources so far not considered. Selected case histories have been presented in some detail also. This material altogether has shown that i current parameterisation of past earthquakes in the Eastern Adriatic should be reconsidered in the light of a critically revised interpretation of the available records; ii collecting new evidence in sources and repositories, not fully exploited so far, is needed. This should aim mostly at overcoming another limitation affecting the evaluation of full sets of earthquake parameters, that is the few observations available for each earthquake. In this perspective, an optimistic assessment of the potential documentation on this area is proposed.

  15. Multi-Meteotsunami Event in the Adriatic Sea Generated by Atmospheric Disturbances of 25-26 June 2014

    Science.gov (United States)

    Šepić, Jadranka; Međugorac, Iva; Janeković, Ivica; Dunić, Natalija; Vilibić, Ivica

    2016-01-01

    A series of meteotsunamis hit a few locations in the Mediterranean and Black Seas during 22-27 June 2014. Meteotsunamis were particularly numerous on 25 and 26 June in the Adriatic Sea, where at least six harbours and bays were stricken by powerful waves: strongest events occurred in Vela Luka (Korčula Island), a known meteotsunami hot-spot, where waves reached height of ~3 m, and in Rijeka dubrovačka Bay, where strong ~5 m/s currents accompanied ~2.5 m high waves. Intensification of high-frequency sea level activity was observed at both the eastern and western Adriatic tide gauge stations, with maximum recorded wave heights reaching ~68 cm (Ortona, Italy). A series of individual air pressure disturbances characterized by pronounced rates of air pressure change (up to 2.4 hPa/5 min), limited spatial extent (~50 km) and high temporal variability, propagated over the Adriatic on 2 days in question. Numerical hydrodynamic model SCHISM forced by measured and idealised air pressure disturbances was utilised to reproduce the observed Adriatic sea level response. Several important conclusions were reached: (1) meteotsunamis occurring at various parts of the coast were generated by different atmospheric air pressure disturbances; (2) topographic influence can be removed from sea level spectra by computing spectral signal-to-background ratios; the result, being related to the external forcing, resembles atmospheric pressure spectra; (3) sea response is strongly dependant on details of atmospheric forcing; and (4) over complex bathymetries, like the middle and south Adriatic ones, numerous effects, including Proudman resonance, edge waves, strong topographical enhancement and refractions on the islands placed on the pathway of atmospheric disturbances should be taken into account to fully understand meteotsunami generation and dynamics. An in-depth numerical study is planned to supplement the latter conclusion and to quantify contribution of each process.

  16. Multi-Meteotsunami Event in the Adriatic Sea Generated by Atmospheric Disturbances of 25-26 June 2014

    Science.gov (United States)

    Šepić, Jadranka; Međugorac, Iva; Janeković, Ivica; Dunić, Natalija; Vilibić, Ivica

    2016-12-01

    A series of meteotsunamis hit a few locations in the Mediterranean and Black Seas during 22-27 June 2014. Meteotsunamis were particularly numerous on 25 and 26 June in the Adriatic Sea, where at least six harbours and bays were stricken by powerful waves: strongest events occurred in Vela Luka (Korčula Island), a known meteotsunami hot-spot, where waves reached height of 3 m, and in Rijeka dubrovačka Bay, where strong 5 m/s currents accompanied 2.5 m high waves. Intensification of high-frequency sea level activity was observed at both the eastern and western Adriatic tide gauge stations, with maximum recorded wave heights reaching 68 cm (Ortona, Italy). A series of individual air pressure disturbances characterized by pronounced rates of air pressure change (up to 2.4 hPa/5 min), limited spatial extent ( 50 km) and high temporal variability, propagated over the Adriatic on 2 days in question. Numerical hydrodynamic model SCHISM forced by measured and idealised air pressure disturbances was utilised to reproduce the observed Adriatic sea level response. Several important conclusions were reached: (1) meteotsunamis occurring at various parts of the coast were generated by different atmospheric air pressure disturbances; (2) topographic influence can be removed from sea level spectra by computing spectral signal-to-background ratios; the result, being related to the external forcing, resembles atmospheric pressure spectra; (3) sea response is strongly dependant on details of atmospheric forcing; and (4) over complex bathymetries, like the middle and south Adriatic ones, numerous effects, including Proudman resonance, edge waves, strong topographical enhancement and refractions on the islands placed on the pathway of atmospheric disturbances should be taken into account to fully understand meteotsunami generation and dynamics. An in-depth numerical study is planned to supplement the latter conclusion and to quantify contribution of each process.

  17. Antibiotic resistant Esherichia coli strains from seafood and its susceptibility to seaweed extracts

    Institute of Scientific and Technical Information of China (English)

    Subramanian Kumaran; Balaraman Deivasigamani; Kumarappan Alagappan; Mannikam Sakthivel; Rajamani Karthikeyan

    2010-01-01

    Objective: To determine the prevalence and antibiotic resistance of Escherichia coli (E.coli) , in seafood obtained from Cuddalore and Parangipettai fish landing centres. Also, to identify the susceptibility of E. coli against predominant seaweeds red alga Kappaphycusalvarezii (K. alvarezii) and brown alga Padina boergessenii (P. boergessenii) extracts as sulfated polysaccharides and polyphenols respectively. Methods: A total of 48 samples (Two stations Cuddalore and Parangipettai, Tamil Nadu, India). Sampling area are fish landing centre where fishes caught from sea and estuary, seafood processing plants (packing and ice packed fishes) and local fish markets (fish samples). After isolation totally 80 strains were analyzed for its antimicrobial resistance and sensitivity against commercially 10 antibiotics. The ampicillin resistant E. coli CE21 was identified through molecular techniques as 16S rDNA sequencing. Two seaweeds K. alvarezii and P. boergessenii were screened for antibacterial activity against 12 antibiotic resistant E. coli strains. Results: Totally 48 swabbed samples from two different fish handling area were characterized for total bacterial and E. coli count. Mostly, the E. coli strains were isolated from fish local market and seafood processing plants before and after packaging process. In that maximum 56.25% strains were resistant to ampicillin and the minimum 2.5% strains were resistant to chloramphenicol. Therefore, the E. coli CE21 was identified through molecular techniques E. coli (GenBank accession number GU065251), The MIC value for polyphenol extract was slightly less than sulfated polysaccharides. E. coli strain isolated from Parangipettai was considerably increased MIC value that Cuddalore. Conclusions:The polyphenol and sulfated polysaccharides showed promising inhibitory response against all antimicrobial resistant E. coli strains and in particular the inhibitory response of ampicillin resistant E. coli.

  18. Isolation and characterization of Vibrio cholerae isolates from seafood in Hat Yai City, Songkhla, Thailand.

    Science.gov (United States)

    Preeprem, Sutima; Mittraparp-arthorn, Pimonsri; Bhoopong, Phuangthip; Vuddhakul, Varaporn

    2014-11-01

    Seafood has been identified as an important source of Vibrio cholerae in Thailand, especially in the Southern coastal region. In this study, we isolated and characterized V. cholerae from seafood obtained from several markets in Hat Yai city, Southern Thailand. A total of 100 V. cholerae isolates were obtained from 55 of 125 seafood samples. The dominant serotype was non-O1/non-O139. Polymerase chain reaction (PCR) analysis was used to detect the presence of pathogenesis-related genes. The stn/sto and hlyA El Tor virulence genes were detected in 20% and 96% of the isolates, respectively. None of the isolates were positive for the ctxA, tcpA, zot, and ace genes. Only 6% of the isolates carried the T3SS gene (vcsV2); however, the majority of the isolates (96%) carried the T6SS gene (vasH). Representative isolates (n=35) that exhibited various virulence gene patterns were randomly selected and analyzed for their hemolytic activity, antibiotic susceptibility, biofilm formation, and genotype. Hemolytic activity using sheep red blood cells was detected in only one of the hlyA-negative isolates. Apart from ampicillin, all isolates were pansusceptible to five test antibiotics. Biofilm production was observed in most of the isolates, and there was no difference in the presence of a biofilm between the smooth and rugose isolates. Using the enterobacterial repetitive intergenic consensus-PCR method, clonal relationships were observed among the isolates that exhibited identical virulence gene patterns.

  19. Examination of Listeria monocytogenes in Seafood Processing Facilities and Smoked Salmon in the Republic of Ireland.

    Science.gov (United States)

    Leong, Dara; Alvarez-Ordóñez, Avelino; Zaouali, Sarah; Jordan, Kieran

    2015-12-01

    Listeria monocytogenes is a foodborne pathogen that causes listeriosis, a relatively rare but life-threatening disease primarily affecting immunocompromised individuals. The aim of this study was to determine the prevalence of L. monocytogenes in the seafood processing industry in the Republic of Ireland. The occurrence of L. monocytogenes was determined by regular sampling of both food samples and processing environment swabs at eight seafood processing facilities over two calendar years. All samples were analyzed by the International Organization for Standardization 11290-1 standard method, and the isolates were characterized by PCR, pulsed-field gel electrophoresis, serotyping, and the occurrence of some genes related to survival under stress (SSI-1, Tn6188, and bcrABC). A prevalence of 2.5% in 508 samples (433 environmental swabs and 75 food samples) was found. From the isolates obtained, eight different pulsed-field gel electrophoresis profiles were identified, two occurring in more than one facility and one occurring in food and the environment. Five of the eight pulsotypes identified contained at least one of the three stress survival-related genes tested. The tolerance of the isolates to benzalkonium chloride, a representative quaternary ammonium compound, was also examined and ranged from 5.5 ± 0.5 to 8.5 ± 0.5 ppm of benzalkonium chloride. To evaluate the ability of smoked salmon to support the growth of L. monocytogenes, including the T4 widespread pulsotype that was isolated, a challenge test was performed on cold-smoked salmon obtained from two separate producers. The results showed clearly that both types of smoked salmon supported the growth of L. monocytogenes. Although occurrence of L. monocytogenes on seafood was low, this study showed that the smoked salmon used in this study can support the growth of L. monocytogenes; therefore, vigilance is required in the processing facilities to reduce the associated risk.

  20. JV Task - 116 Selenium's Role in the Seafood Safety Issue

    Energy Technology Data Exchange (ETDEWEB)

    Nicholas Ralston; Laura Raymond

    2009-03-30

    Continuing studies under these three funded projects - (JV Task 77 The Health Implications of the Mercury-Selenium Interaction, JV Task 96 Investigating the Importance of the Mercury-Selenium Interaction, and JV Task 116 Selenium's Role in the Seafood Safety Issue) - were performed to determine the effects of different levels of dietary mercury and selenium on the growth and development of test animals, and related tissue analyses, to understand the protective benefits of dietary selenium in reference to low-level exposure to mercury. Maternal exposure to methylmercury from seafood has been found to cause neurodevelopmental harm in children. However, significant nutritional benefits will be lost if fish consumption is needlessly avoided. The results of these studies support the hypothesis that intracellular Se itself is the physiologically important biomolecule and that the harm of mercury toxicity arises when Hg abundance becomes great enough to bind a significant portion of intracellular Se in vulnerable tissues such as the brain. Formation of HgSe limits bioavailability of Se for synthesis of Se-dependent enzymes, particularly in brain tissues. When production of these enzymes is impaired, the loss of their numerous essential functions results in the signs and symptoms of Hg toxicity. The finding that one mole of Se protects against many moles of Hg indicates that its beneficial effect is not due to sequestration of mercury as HgSe but rather due to the biological activity of the Se. Therefore, the selenium content of seafoods must be considered along with their methylmercury contents in evaluating the effect of dietary exposure to mercury.

  1. Eco-label conveys reliable information on fish stock health to seafood consumers.

    Directory of Open Access Journals (Sweden)

    Nicolás L Gutiérrez

    Full Text Available Concerns over fishing impacts on marine populations and ecosystems have intensified the need to improve ocean management. One increasingly popular market-based instrument for ecological stewardship is the use of certification and eco-labeling programs to highlight sustainable fisheries with low environmental impacts. The Marine Stewardship Council (MSC is the most prominent of these programs. Despite widespread discussions about the rigor of the MSC standards, no comprehensive analysis of the performance of MSC-certified fish stocks has yet been conducted. We compared status and abundance trends of 45 certified stocks with those of 179 uncertified stocks, finding that 74% of certified fisheries were above biomass levels that would produce maximum sustainable yield, compared with only 44% of uncertified fisheries. On average, the biomass of certified stocks increased by 46% over the past 10 years, whereas uncertified fisheries increased by just 9%. As part of the MSC process, fisheries initially go through a confidential pre-assessment process. When certified fisheries are compared with those that decline to pursue full certification after pre-assessment, certified stocks had much lower mean exploitation rates (67% of the rate producing maximum sustainable yield vs. 92% for those declining to pursue certification, allowing for more sustainable harvesting and in many cases biomass rebuilding. From a consumer's point of view this means that MSC-certified seafood is 3-5 times less likely to be subject to harmful fishing than uncertified seafood. Thus, MSC-certification accurately identifies healthy fish stocks and conveys reliable information on stock status to seafood consumers.

  2. On Baltic Slovenia and Adriatic Lithuania. A qualitative comparative analysis of patterns in post-communist transformation / Lars Fredrik Stöcker

    Index Scriptorium Estoniae

    Stöcker, Lars Fredrik, 1979-

    2014-01-01

    Arvustus: Norkus, Zenonas. On Baltic Slovenia and Adriatic Lithuania. A qualitative comparative analysis of patterns in post-communist transformation. Verlag Apostrofia Publishers, Central European University Press. Budapest und New York 2012

  3. The concept of glocal seafood: a case study of Madagascar shrimps

    Directory of Open Access Journals (Sweden)

    Inger Beate Pettersen

    2007-06-01

    Full Text Available Cette étude de cas considère le concept de produits « glocaux » dans des perspectives théoriques issues de géographie et de marketing, en observant l’effet de la mondialisation sur les systèmes de productions locaux. Ce papier met en valeur le pouvoir relatif des forces locales et globales, et le jeu interactif entre acteurs globaux et locaux à partir de l’étude empirique des crevettes de Madagascar sur le marché français. L’étude montre que les acteurs locaux peuvent définir les stratégies liées aux conditions et à la croissance économique de leur production, tout en étant dépendant des ressources extérieures et étrangères. Le succès des crevettes de Madagascar sur le marché français est donc tributaire de l’interaction et des relations entre les différents acteurs.This paper discusses the concept of glocal seafood through theories drawn from geography and marketing. The central theme of the paper is the effect of globalization processes on local production systems. We discuss the relative power of local and global forces and the interplay between local and global and actors. Moreover, we explain the specific glocalization process of the seafood industry and provide evidence from an empirical study of the success on the French market of shrimps from Madagascar, a pioneering country with regard to developing sustainable fisheries and seafood farming. The case shows that local actors have the power and control to set conditions and define strategies for economic growth in the local seafood industry. However, the local production system in turns depends on foreign resources – financial, technical and human, to create economic growth. The success of Madagascar shrimps is therefore the result of the long term interplay between local and global actors.

  4. Stability of arsenic compounds in seafood samples during processing and storage by freezing

    DEFF Research Database (Denmark)

    Dahl, Lisbeth; Molin, Marianne; Amlund, Heidi

    2010-01-01

    In this study, the stability of arsenic compounds in fresh and frozen samples of raw, boiled and fried Atlantic cod (Gadhus morhua), Atlantic salmon (Salmo salar) and blue mussel (Mytilus edulis) were examined. Results show that the total arsenic concentrations of the fresh Atlantic cod...... and Atlantic salmon samples were not different from the frozen samples within the same seafood type. For blue mussel, the total arsenic concentration decreased significantly after storage. Inorganic arsenic was found only in blue mussels and, importantly, no significant increase of inorganic arsenic...

  5. POLYCYCLIC AROMATIC HYDROCARBONS (PAHS IN SEAFOODS CAUGHT IN CORIGLIANO CALABRO GULF (CS,ITALY

    Directory of Open Access Journals (Sweden)

    R. Marrone

    2012-08-01

    Full Text Available Polycyclic aromatic hydrocarbons (PAHs were determined by high performance liquid chromatography (HPLC with fluorescence detection in seafoods (Merluccius merluccius, Arnoglossus laterna, Scomber japonicus, Penaeus kerathurus, Eledone cirrhosa collected along coasts of Corigliano Calabro gulf (Calabria Region - Italy. The results showed that Bap levels exceeded the limit fixed by EU Regulation 1881/2006 in only four samples of Merluccius merluccius, Arnoglossus laterna and Scomber japonicus particularly. PAH concentrations detected in samples caught in winter were higher than those found in summer.

  6. Insights on Continental Collisional Processes from GPS Data: Dynamics of the Peri-Adriatic Belts

    Science.gov (United States)

    Metois, Marianne; D'Agostino, Nicola; Avallone, Antonio; Chamot-Rooke, Nicolas; Rabaute, Alain; Duni, Llambro; Kuka, Neki; Koci, Rexhep; Georgiev, Ivan

    2015-04-01

    Recent advances in GPS technology and processing strategies make now spatial geodesy a suitable tool to image intra-continental slowly deforming areas such as collisional mountain belts and to get further insights on their kinematics and dynamics. Here, using the peri-Adriatic belts as a test case, we propose a methodology based on accurate GPS velocities to discriminate whether the current day deformation pattern over a mountain belt is controlled at the first order by gravity through gradients of gravitational potential energy. We calculate a new GPS velocity field covering the peri-Adriatic region and the entire Balkan Peninsula, taking advantage of newly available measurements coming from private networks operating since several years in this area. Based on these velocities, we derive the strain rate tensor and an interpolated velocity field using the method of Haines & Holt (1993). Opposite to the commonly accepted hypothesis considering the Balkans as part of the stable Eurasia, we show that the peninsula experiences significant compression across the Dinarides belt and extension toward the Aegean domain South of 44°N. We image a clockwise rotation of the entire peninsula around North Albania, and propose that the lithosphere under the old Scutari-Peck transform zone is weak and acts as a pivot point for this rotation since early Miocene. The Hellenic slab suction and the release of stress in the northern Hellenides subduction zone may favour the southwestward motion of the inner Balkan lithosphere, flowing between the rigid Apulia and Black sea blocks consequently. Because our velocity field is unusually dense in Slovenia and Austria, we picture the Eastern Alps deformation with great details and show that the Austrian Alps are moving eastward together with the Alpine foreland and Bohemian Promontory relative to stable Eurasia. Based on these new GPS data, we investigate the dynamics of the peri-Adriatic mountain belts, in particular of Albania and Eastern

  7. An operational coupled wave-current forecasting system for the northern Adriatic Sea

    Science.gov (United States)

    Russo, A.; Coluccelli, A.; Deserti, M.; Valentini, A.; Benetazzo, A.; Carniel, S.

    2012-04-01

    Since 2005 an Adriatic implementation of the Regional Ocean Modeling System (AdriaROMS) is being producing operational short-term forecasts (72 hours) of some hydrodynamic properties (currents, sea level, temperature, salinity) of the Adriatic Sea at 2 km horizontal resolution and 20 vertical s-levels, on a daily basis. The main objective of AdriaROMS, which is managed by the Hydro-Meteo-Clima Service (SIMC) of ARPA Emilia Romagna, is to provide useful products for civil protection purposes (sea level forecasts, outputs to run other forecasting models as for saline wedge, oil spills and coastal erosion). In order to improve the forecasts in the coastal area, where most of the attention is focused, a higher resolution model (0.5 km, again with 20 vertical s-levels) has been implemented for the northern Adriatic domain. The new implementation is based on the Coupled-Ocean-Atmosphere-Wave-Sediment Transport Modeling System (COAWST)and adopts ROMS for the hydrodynamic and Simulating WAve Nearshore (SWAN) for the wave module, respectively. Air-sea fluxes are computed using forecasts produced by the COSMO-I7 operational atmospheric model. At the open boundary of the high resolution model, temperature, salinity and velocity fields are provided by AdriaROMS while the wave characteristics are provided by an operational SWAN implementation (also managed by SIMC). Main tidal components are imposed as well, derived from a tidal model. Work in progress is oriented now on the validation of model results by means of extensive comparisons with acquired hydrographic measurements (such as CTDs or XBTs from sea-truth campaigns), currents and waves acquired at observational sites (including those of SIMC, CNR-ISMAR network and its oceanographic tower, located off the Venice littoral) and satellite-derived wave-heights data. Preliminary results on the forecast waves denote how, especially during intense storms, the effect of coupling can lead to significant variations in the wave

  8. Consumer purchasing behaviour towards fish and seafood products. Patterns and insights from a sample of international studies.

    Science.gov (United States)

    Carlucci, Domenico; Nocella, Giuseppe; De Devitiis, Biagia; Viscecchia, Rosaria; Bimbo, Francesco; Nardone, Gianluca

    2015-01-01

    The present systematic review was performed to assess consumer purchasing behaviour towards fish and seafood products in the wide context of developed countries. Web of Science, Scopus, ScienceDirect and Google Scholar engines were used to search the existing literature and a total of 49 studies were identified for inclusion. These studies investigated consumer purchasing behaviour towards a variety of fish and seafood products, in different countries and by means of different methodological approaches. In particular, the review identifies and discusses the main drivers and barriers of fish consumption as well as consumers' preferences about the most relevant attributes of fish and seafood products providing useful insights for both practitioners and policy makers. Finally, main gaps of the existing literature and possible trajectories for future research are also discussed.

  9. Reassuring or risky: the presentation of seafood safety in the aftermath of the British Petroleum Deepwater Horizon Oil Spill.

    Science.gov (United States)

    Greiner, Amelia L; Lagasse, Lisa P; Neff, Roni A; Love, David C; Chase, Rachel; Sokol, Natasha; Smith, Katherine Clegg

    2013-07-01

    The BP Deepwater Horizon Oil Spill was enormously newsworthy; coverage interlaced discussions of health, economic, and environmental impacts and risks. We analyzed 315 news articles that considered Gulf seafood safety from the year following the spill. We explored reporting trends, risk presentation, message source, stakeholder perspectives on safety, and framing of safety messages. Approximately one third of articles presented risk associated with seafood consumption as a standalone issue, rather than in conjunction with environmental or economic risks. Government sources were most frequent and their messages were largely framed as reassuring as to seafood safety. Discussions of prevention were limited to short-term, secondary prevention approaches. These data demonstrate a need for risk communication in news coverage of food safety that addresses the larger risk context, primary prevention, and structural causes of risk.

  10. A COMPARISON OF EXTRACTION EFFICIENCIES IN SEAFOOD MATRICES USING A SYNTHETIC STOMACH AND AN ACCELERATED SOLVENT EXTRACTION APPROACH WITH IC-ICP-MS DETECTION

    Science.gov (United States)

    Seafood is one of the largest sources of dietary arsenic exposure. Because most of the arsenic present is non-toxic (such as arsenobetaine [AsB]), the consumption of seafood is thought to result in a low risk or non-toxic exposure. This can be misleading for two reasons. First...

  11. Food and nutrient intakes of French frequent seafood consumers with regard to fish consumption recommendations: results from the CALIPSO study.

    Science.gov (United States)

    Sirot, Véronique; Dumas, Céline; Leblanc, Jean-Charles; Margaritis, Irène

    2011-05-01

    Besides providing n-3 fatty acids with nutritional and health benefits, seafood consumption may contribute to the reduction of nutrient prevalences of inadequacy. To evaluate the contributions of seafood and other food groups to nutrient intakes of frequent seafood consumers, food consumption was evaluated through an FFQ on 991 French men and women (18-81 years) consuming seafood at least twice a week. Intakes, prevalence of inadequacies, risks of upper limit excess and food contributions to intakes were assessed for thirty-three nutrients. Mean fat contributions to total energy intakes (38·3 and 39·0 % for men and women, respectively) met French recommendations, but mean carbohydrate intakes (40·9 and 39·7 %, respectively) were insufficient. Micronutrient inadequacies were lower than in the French general population, the highest being for vitamin C (41·3 and 40·1 % for men and women, respectively), vitamin E (35·0 and 35·3 % for men and women, respectively) and Mg (37·5 and 25·5 % for men and women, respectively). Upper safety limits (USL) were exceeded mostly for Zn (6·2 %), Ca (3·7 %), retinol (2·0 %) and Cu (0·9 %). Mean contributions of seafood to vitamin D, B12, I and Se intakes ranged 40-65 %. Molluscs and crustaceans significantly contributed to vitamin B12 (13·7 %), Cu (11·4 %), Fe (11·5 %), Zn (8·4 %) and I (6·1 %) intakes, and canned fish contributed to vitamin D intake (13·4 %). Besides fish, contributions of mollusc and crustacean consumption to nutrient intakes should be considered from a public health viewpoint. Consuming seafood at least twice a week induces moderate inadequacies and risks of exceeding USL for some micronutrients, whereas macronutrient intakes remained imbalanced.

  12. Polychlorinated biphenyls in fresh and canned fish from the Central Adriatic.

    Science.gov (United States)

    Kipcić, D; Vukusić, J

    1991-01-01

    By using the GLC method, levels of polychlorinated biphenyls (PCBs) were determined in fresh and canned fish during the 1984-88 period. Forty-six samples of fish caught in the Central Adriatic's littoral, 11 of which in a control, non-industrialized area, and 35 in an urbanized area strongly affected by industry, were collected. Also, 101 samples of canned fish were tested for PCBs. The average PCB values were 0.059 mg kg-1 and 0.287 mg kg-1 in control and polluted areas, respectively; the mean value in canned fish was 0.194 mg kg-1. Although the levels of PCBs in control and industrialized areas were found to differ, the difference was not significant statistically.

  13. Isotopic characteristics of shells Mytilus galloprovincialis from eastern coastal area of Adriatic Sea

    Directory of Open Access Journals (Sweden)

    Tjaša Kanduč

    2006-06-01

    Full Text Available Samples of Mytilus galloprovincialis were collected from entire Eastern Adriatic coast to determine δ18O and δ13C performed on calcite and aragonite shell layers. The aim of this work was to check whether shells of M. galloprovincialis are good environmental indicators (water temperature, salinity. Based on measured isotopic composition of oxygen in shell layers and assumed isotopic composition in water temperatures of calcite and aragonite of shell layers were calculated. The calculated temperatures for M. galloprovincialis shell growth of calcite and aragonite shell layer are in good agreement with measured temperatures of sea water. According to our results of δ18O and δ13C in shell layers we canseparate the locations of the investigated area into three groups: those with more influence of fresh water, those with less influence of fresh water and those of marine environments.

  14. Exceptional dense water formation on the Adriatic shelf in the winter of 2012

    Directory of Open Access Journals (Sweden)

    H. Mihanović

    2013-06-01

    Full Text Available In this paper we document dense water formation throughout the Adriatic shelf and coastal area in January/February 2012, resulting in record-breaking densities observed during and after the event. The unprecedented dense water generation was preconditioned by a dry and warm year which resulted in a significant reduction of coastal freshwaters, superimposed on a long-term basin-wide salinity increase. The final event that triggered the dense water formation was an extended period of cold weather with strong and severe winds. Record-breaking potential density anomalies (above 30 kg m−3 were measured at several formation sites. Accumulated surface net heat and water losses in some coastal regions exceeded 1.5 GJ m−2 and 250 kg m−2 over 21 days, respectively. Excessiveness, importance of shelf-type dense water formation and effects on the thermohaline circulation and deep aquatic systems are discussed.

  15. Occurrence of Vibrio and other pathogenic bacteria in Mytilus galloprovincialis (mussels) harvested from Adriatic Sea, Italy.

    Science.gov (United States)

    Ripabelli, G; Sammarco, M L; Grasso, G M; Fanelli, I; Caprioli, A; Luzzi, I

    1999-08-01

    Sixty-two samples of Mytilus galloprovincialis (mussels) harvested from approved shellfish waters in the Adriatic Sea were examined for the presence of Vibrio, Salmonella, Campylobacter, and verocytotoxin producing Escherichia coli. Vibrio spp. were isolated from 48.4% of samples; the species most frequently found were V. alginolyticus (32.2%) and V. vulnificus (17.7%), followed by V. cincinnatiensis (3.2%), V. parahaemolyticus (1.6%), V. fluvialis (1.6%) and V. cholerae non-O1 (1.6%). V. parahaemolyticus resulted negative to Kanagawa-phenomenon and to PCR amplification of tdh gene. V. cholerae resulted negative to PCR amplification of sto gene. No Salmonella, Campylobacter, or E. coli verocytotoxin-producing strains were isolated. The results of this study suggest the potential risk of ingesting raw or undercooked mussels due to the frequent presence of potentially pathogenic Vibrio species.

  16. Life-history traits and population decline of the Atlantic mackerel Scomber scombrusin the Adriatic Sea.

    Science.gov (United States)

    Meneghesso, C; Riginella, E; La Mesa, M; Donato, F; Mazzoldi, C

    2013-11-01

    This study investigated demographic structure and reproductive characteristics of the Atlantic mackerel Scomber scombrus, in relation to landing trends in the northern-central Adriatic Sea. Results highlighted the occurrence of only small-sized and young-age individuals, and a marked decline from the 1990s to the present in maximum age (from 8 to 3 years) and total length (L(T); from 420 to 360 mm). Fecundity ranged between 40,000 and 190,000 eggs, and was related to female L(T). High levels of atresia implied lower values of actual fecundity. Sexual maturity was attained by 72·8% of individuals in their first year of life at 200 mm. The reduction in maximum L(T) resulted in a marked decline in the population egg production, while the reduction in maximum age implied that females participated in fewer spawning events.

  17. A review of modeling applications using ROMS model and COAWST system in the Adriatic sea region

    CERN Document Server

    Carniel, Sandro

    2013-01-01

    From the first implementation in its purely hydrodynamic configuration, to the last configuration under the Coupled Ocean-Atmosphere-Wave-Sediment Transport (COAWST) system, several specific modelling applications of the Regional Ocean Modelling Systems (ROMS, www.myroms.org) have been put forward within the Adriatic Sea (Italy) region. Covering now a wide range of spatial and temporal scales, they developed in a growing number of fields supporting Integrated Coastal Zone Management (ICZM) and Marine Spatial Planning (MSP) activities in this semi-enclosed sea of paramount importance including the Gulf of Venice. Presently, a ROMS operational implementation provides every day hydrodynamic and sea level 3-days forecasts, while a second one models the most relevant biogeochemical properties, and a third one (two-way coupled with the Simulating Waves Nearshore (SWAN) model) deals with extreme waves forecast. Such operational models provide support to civil and environmental protection activities (e.g., driving su...

  18. Directional Storm Surge in Enclosed Seas: The Red Sea, the Adriatic, and Venice

    Directory of Open Access Journals (Sweden)

    Carl Drews

    2015-05-01

    Full Text Available Storm surge is dependent on wind direction, with maximum surge heights occurring when strong winds blow onshore. It is less obvious what happens when a port city is situated at the end of a long narrow gulf, like Venice at the northwestern end of the Adriatic Sea. Does the narrow marine approach to the port city limit the dangerous wind direction to a span of only a few degrees? This modeling study shows that the response in surge height to wind direction is a sinusoidal curve for port cities at the end of a long inlet, as well as for cities exposed along a straight coastline. Surge height depends on the cosine of the angle between the wind direction and the major axis of the narrow gulf. There is no special protection from storm surge afforded by a narrow ocean-going approach to a port city.

  19. Accumulation of radiocesium in fine recent sediments of the Northern Adriatic Sea

    Energy Technology Data Exchange (ETDEWEB)

    Delfanti, R.; Papucci, C. [ENEA, La Spezia (Italy). Centro Ricerche Ambiente Marino; Frignani, M.; Langone, L.; Ravaioli, M. [Consiglio Nazionale delle Richerche, Bologna (Italy). Istituto di Geologia Marina

    1997-12-31

    {sup 137}Cs and {sup 210}Pb were used to get insight into present sedimentary processes in the Northern Adriatic coastal area. Concentrations and inventories of {sup 137}Cs clearly indicate that radiocesium in the sediments is supplied mostly from rivers and preferentially accumulates in the pro-delta areas. In 1987 {sup 137}Cs maximum concentrations and inventories in these zones ranged between 200 and 300 Bq/kg and between 12 and 64 kBq/m{sup 2}, respectively. The stability of the pro-delta deposits was studied by sampling in the same location in different years. Temporal differences in the radionuclide inventories and depth profiles show that some areas are unstable on the time scale from months to years due to sediment removal processes. (author) 7 refs.

  20. Sea level variability at Adriatic coast and its relationship to atmospheric forcing

    Directory of Open Access Journals (Sweden)

    K. Bergant

    2005-09-01

    Full Text Available Sea level (SLH variability at the Adriatic coast was investigated for the period 1872–2001 using monthly average values of observations at 13 tide gauge stations. Linear trends and seasonal cycles were investigated first and removed afterwards from the data. Empirical Orthogonal Functions (EOF analysis was used further on remaining anomalies (SLA to extract the regional intermonthly variability of SLH. It was found that the leading EOF and its principal component (PC explain a major part of SLA variability (92%. The correlation between the reconstructed SLA, based on leading EOF and its PC, and overlapping observed SLA values for selected tide gauge stations is between 0.93 and 0.99. Actual SLH values at tide gauge stations can be reconstructed and some gaps in the data can be filled in on the basis of estimated SLA values if reasonable estimates of long-term trends and seasonal cycles are also available. A strong, seasonally dependent relationship between SLA at the Adriatic coast and atmospheric forcing, represented by sea level pressure (SLP fields, was also found. Comparing the time series of leading PC and gridded SLP data for the period 1948–2001, the highest correlation coefficients (r of –0.92 in winter, –0.84 in spring, –0.66 in summer, and –0.91 in autumn were estimated for a SLP grid point located in northern Italy. The SLP variability on this grid point contains information about the isostatic response of the sea level at the Adriatic coast, but can also be treated as a sort of teleconnection index representing the large-scale SLP variability across central and southern Europe. To some extent the large-scale SLP variability that affects the SLA at the Adriatic coast can be related to the North Atlantic Oscillation (NAO, because significant correlations were found between the NAO index and the first PC of SLA (rwinter=–0.56, rspring=–0.45, rsummer=–0

  1. North Adriatic Tides: Observations, Variational Data Assimilation Modeling, and Linear Tide Dynamics

    Science.gov (United States)

    2009-12-01

    in the North Adriatic as GEOFIZIKA, VOL. 26, NO. 2, 2009, 115–143 117 70 60 50 4030 20 20 50 80 80 SS2 SS4 SS5 SS6 SS8 SS9 SS10KB1 CP2 CP3 VR1 VR2 VR4...59 SS10 44.4812 N 14.2904 E 51 CP2 44.4610 N 12.8551 E 42 CP3 44.5402 N 13.1245 E 42 KB1 44.7507 N 14.0213 E 48 VR1 45.3139 N 12.5081 E 17...applied to these values to account for the inferred (but unexplained) counter-clockwise compass bias in the VR5 measurements (see Section 2.1). CP2 CP3

  2. Performance analysis of coupled and uncoupled hydrodynamic and wave models in the northern Adriatic Sea

    Science.gov (United States)

    Busca, Claudia; Coluccelli, Alessandro; Valentini, Andrea; Benetazzo, Alvise; Bonaldo, Davide; Bortoluzzi, Giovanni; Carniel, Sandro; Falcieri, Francesco; Paccagnella, Tiziana; Ravaioli, Mariangela; Riminucci, Francesco; Sclavo, Mauro; Russo, Aniello

    2014-05-01

    The complex dynamics of the Adriatic Sea are the result of geographical position, orography and bathymetry, as well as rivers discharge and meteorological conditions that influence, more strongly, the shallow northern part. Such complexity requires a constant monitoring of marine conditions in order to support several activities (marine resources management, naval operations, emergency management, shipping, tourism, as well as scientific ones). Platforms, buoys and mooring located in Adriatic Sea supply almost continuously real time punctual information, which can be spatially extended, with some limitations, by drifters and remote sensing. Operational forecasting systems represent valid tools to provide a complete tridimensional coverage of the area, with a high spatial and temporal resolution. The Hydro-Meteo-Clima Service of the Emilia-Romagna Environmental Agency (ARPA-SIMC, Bologna, Italy) and the Dept. of Life and Environmental Sciences of Università Politecnica delle Marche (DISVA-UNIVPM, Ancona, Italy), in collaboration with the Institute of Marine Science of the National Research Council (ISMAR-CNR, Italy) operationally run several wave and hydrodynamic models on the Adriatic Sea. The main implementations are based on the Regional Ocean Modeling System (ROMS), the wave model Simulating WAves Nearshore (SWAN), and the coupling of the former two models in the Coupled Ocean-Atmosphere-Wave-Sediment Transport (COAWST) system. Horizontal resolutions of the different systems range from the 2 km of AdriaROMS to the 0.5 km of the recently implemented northern Adriatic COAWST. Forecasts are produced every day for the subsequent 72 hour with hourly resolution. All the systems compute the fluxes exchanged through the interface with the atmosphere from the numerical weather prediction system named COSMO-I7, an implementation for Italy of the Consortium for Small-scale Modeling (COSMO) model, at 7 km horizontal resolution. Considering the several operational

  3. Drifter dispersion in the Adriatic Sea: Lagrangian data and chaotic model

    Directory of Open Access Journals (Sweden)

    G. Lacorata

    Full Text Available We analyze characteristics of drifter trajectories from the Adriatic Sea with recently introduced nonlinear dynamics techniques. We discuss how in quasi-enclosed basins, relative dispersion as a function of time, a standard analysis tool in this context, may give a distorted picture of the dynamics. We further show that useful information may be obtained by using two related non-asymptotic indicators, the Finite-Scale Lyapunov Exponent (FSLE and the Lagrangian Structure Function (LSF, which both describe intrinsic physical properties at a given scale. We introduce a simple chaotic model for drifter motion in this system, and show by comparison with the model that Lagrangian dispersion is mainly driven by advection at sub-basin scales until saturation sets in.

    Key words. Oceanography: General (marginal and semi-closed seas – Oceanography: Physical (turbulence, diffusion, and mixing processes; upper ocean processes

  4. Post-mortem investigations on a leatherback turtle Dermochelys coriacea stranded along the Northern Adriatic coastline.

    Science.gov (United States)

    Poppi, Lisa; Zaccaroni, Annalisa; Pasotto, Daniela; Dotto, Giorgia; Marcer, Federica; Scaravelli, Dino; Mazzariol, Sandro

    2012-08-13

    Leatherback sea turtles Dermochelys coriacea are regularly reported in the Mediterranean Sea but rarely reach the northern Adriatic Sea. In the summer of 2009, a well-preserved carcass of an adult female of this species was found dead along the coast of Lido di Venezia. A complete necropsy was carried out, along with evaluation of levels of tissue trace elements. The the post-mortem revealed acute severe bacterial gastroenteritis caused by Photobacterium damselae ssp. piscicida, an opportunistic agent that infected an apparently debilitated animal weakened by ingested plastic debris. High levels of heavy metals (Hg, Pb, Cd and As) found in the liver and kidneys might have contributed to the animal's demise. These findings support previous indications that marine debris is one of the major threats to marine animals, particularly for critically endangered species such as the leatherback turtle.

  5. Characteristic carotenoids in some phytobenthos species in the coastal area of the Adriatic Sea

    Directory of Open Access Journals (Sweden)

    Bazyli Czeczuga

    2014-01-01

    Full Text Available The author investigated the presence of various carotcnoids in some phytobenthos species (20 species representative of Chlorophytn, Phaeophyta and Rhodophyta from the coast of the Adriatic Sea. The presence of following carotenoids has been determined 1 in Chlorophyta lycopene, α-, β-, γ- , ε-carotene, β-cryptoxanthin, lutein, lutein epoxide, zeaxanthin, antheraxanthin, neoxanthin, violaxanthin, siphonein and astaxanthin esier; 2 in Phorophyta: α-, β-, γ- , ε- carotene, zeaxanthin, antheraxanthin, diataxanthin, fucoxanthin, fucoxanthol, neoxanthin, violaxanthin and rhodoxanthin-like: 3 in Rhodophyta α-, β-, γ-carotene,α-, β-,cryptoxanthin, lutein lutein epoxide, zeaxanthin, anthcraxanthin, mutatoxanthin, fucoxanthin neoxanthin and violaxanthin The total carotenoid content ranged from 1.197 ( Cystoseira corniculata to 16 748 mg g-1 dry weight (Chaetomorpha aerea.

  6. Regional approach to modeling the transport of floating plastic debris in the Adriatic Sea.

    Science.gov (United States)

    Liubartseva, S; Coppini, G; Lecci, R; Creti, S

    2016-02-15

    Sea surface concentrations of plastics and their fluxes onto coastlines are simulated over 2009-2015. Calculations incorporate combinations of terrestrial and maritime litter inputs, the Lagrangian model MEDSLIK-II forced by AFS ocean current simulations, and ECMWF wind analyses. With a relatively short particle half-life of 43.7 days, the Adriatic Sea is defined as a highly dissipative basin where the shoreline is, by construction, the main sink of floating debris. Our model results show that the coastline of the Po Delta receives a plastic flux of approximately 70 kg(km day)(-1). The most polluted sea surface area (>10 g km(-2) floating debris) is represented by an elongated band shifted to the Italian coastline and narrowed from northwest to southeast. Evident seasonality is found in the calculated plastic concentration fields and the coastline fluxes. Complex source-receptor relationships among the basin's subregions are quantified in impact matrices.

  7. Eutrophication in the northern Adriatic Sea: Pore water and sediment studies

    Energy Technology Data Exchange (ETDEWEB)

    Hammond, D.E.; Berelson, W.M. (Univ. of Southern California, Los Angeles (United States)); Giordani, P.; Langone, L.; Frignani, M.; Ravaioli, M. (Inst. di Geologia Marina, CNR, Bologna (Italy))

    1990-01-09

    The northern Adriatic Sea has been plagued by problems of eutrophication. This area is relatively shallow (maximum depth = 60m), becoming stratified during the summer months which inhibits oxygen transport to bottom waters. Anthropogenic nutrient loading in rivers entering the northern Adriatic (Po River being the largest) has increased nutrient input to this system and stimulated algal growth. Cores were collected for studies of pore water and solid phase chemistry at 6 stations in this region. [sup 210]Pb was used to constrain sediment accumulation rates and a range of 0-0.5 cm/yr was determined at different stations. Excess [sup 234]Th was only found in the upper 1-2 cm, suggesting that bioturbation is largely restricted to shallow depths. Pore water profiles show evidence of irrigation, and mean diffusive fluxes for oxygen, silica phosphate and ammonia are generally 20-90% of the fluxes obtained from benthic chamber measurements. This is consistent with previous work in this area in which studies of radon fluxes indicated that irrigation plays an important role in sediment-water exchange. Pore water profiles in the northern portion of the study area (near the Po River Delta) were markedly different than profiles in the south; sediments in the north are substantially more acidic and have high concentrations of dissolved iron and phosphate. From the alkalinity vs. TCO[sub 2] relationship in sediment pore waters it appears that differences in reactions involving the reduction of iron oxides and the exchange of magnesium for iron in clays are responsible for this regional difference in pore water properties. Sediments close to the Po apparently undergo more iron-magnesium exchange, while more distal sediments are limited in their ability to do so. Other pore water observations are limited in their ability to do so. Other pore water observations and trends regarding the shape of the silica profiles (which show shallow maxima) will be discussed.

  8. Teleconnections force interannual-to-decadal tidal variability in the Lagoon of Venice (northern Adriatic)

    Science.gov (United States)

    Zanchettin, D.; Rubino, A.; Traverso, P.; Tomasino, M.

    2009-04-01

    In the present investigation, for the first time, fundamental characteristics of autumn and winter average sequences of sea level heights (SLH) that were recorded in the Lagoon of Venice (northern Adriatic, in the Mediterranean Sea) during the period 1872-2004 are investigated. Interannual-to-decadal variability of Venetian SLH is found to reflect the variability of the most prominent Euro-Atlantic teleconnections (EATs). In particular, the North Atlantic Oscillation (NAO), the East Atlantic/Western Russian, and the Scandinavian patterns are found to contribute to generate the ˜5-year, ˜8-year and ˜22-year peaks that dominate the spectra of seasonal Venetian SLH. Among the possible oceanic and atmospheric phenomena downscaling interannual-to-decadal large-scale atmospheric signals into the observed variability in the Venetian SLH, we explore inverse barometer effect, wind-driven setup, and the thermohaline circulation of both the Adriatic and the Mediterranean seas. All these phenomena are assessed to display some of the typical features of the shared interannual-to-decadal variability of both Venetian SLH and EATs. Our analysis shows also that the decadal variability of winter Venetian SLH is closely linked with variations in solar activity: in particular, the winter SLH multidecadal pattern is found to be correlated, with very high statistical confidence, to the Hale Cycles pattern (˜22 years), which describes the series of sunspot cycles with alternating opposite polarity. The marked signature of Hale Cycles on the leading mode of multidecadal sea level pressure winter variability (which is practically indistinguishable from the inverse wintertime NAO) is also detailed to further support the hypothesis of a Sun-Venetian SLH association.

  9. Mitochondrial DNA and Y-chromosome diversity in East Adriatic sheep.

    Science.gov (United States)

    Ferencakovic, M; Curik, I; Pérez-Pardal, L; Royo, L J; Cubric-Curik, V; Fernández, I; Alvarez, I; Kostelic, A; Sprem, N; Krapinec, K; Goyache, F

    2013-04-01

    Variation in mitochondrial DNA (mtDNA) and Y-chromosome haplotypes was analysed in nine domestic sheep breeds (159 rams) and 21 mouflon (Ovis musimon) sampled in the East Adriatic. Mitochondrial DNA analyses revealed a high frequency of type B haplotypes, predominantly in European breeds, and a very low frequency of type A haplotypes, which are more frequent in some Asian breeds. Mitochondrial haplotype Hmt-3 was the most frequent (26.4%), and 37.1%, 20.8% and 7.6% of rams had haplotypes one, two and three mutations remote from Hmt-3 respectively. In contrast, Y-chromosome analyses revealed extraordinary paternal allelic richness: HY-6, 89.3%; HY-8, 5.0%; HY-18, 3.1%; HY-7, 1.3%; and HY-5, 1.3%. In fact, the number of haplotypes observed is comparable to the number found in Turkish breeds and greater than the number found in European breeds so far. Haplotype HY-18 (A-oY1/135-SRYM18), identified here for the first time, provides a link between the haplotype HY-12 (A-oY1/139-SRYM18) found in a few rams in Turkey and haplotype HY-9 (A-oY1/131-SRYM18) found in one ram in Ethiopia. All mouflons had type B mtDNA haplotypes, including the private haplotype (Hmt-55), and all were paternally monomorphic for haplotype HY-6. Our data support a quite homogeneous maternal origin of East Adriatic sheep, which is a characteristic of European breeds. At the same time, the high number of haplotypes found was surprising and intriguing, and it begs for further analysis. Simultaneous analysis of mtDNA and Y-chromosome information allowed us to detect a large discrepancy between maternal and paternal lineages in some populations. This is most likely the result of breeder efforts to 'upgrade' local populations using rams with different paternal origins.

  10. Climate change risks and adaptation options across Australian seafood supply chains – A preliminary assessment

    Directory of Open Access Journals (Sweden)

    A. Fleming

    2014-01-01

    Full Text Available Climate change is already impacting the biology of the oceans and some dependent industries are in turn responding to these impacts. The development of response options for users of marine resources, such as fishers, is important in guiding adaptation efforts. However, harvesting fish is only the first step in a supply chain that delivers seafood to consumers. Impacts higher up the chain have seldom been considered in fisheries-climate research yet an understanding of these impacts and how climate risks and adaptation information are interpreted and used by stakeholders across the chain is vital for developing viable and sustainable adaptation options. We examined stakeholder perceptions of points where climate change impacts and adaptations currently occur, or may occur in the future, across the supply chains of several Australian fisheries (southern rock lobster, tropical rock lobster, prawn and aquaculture sectors (oyster, aquaculture prawn. We found that climate change impacts are well understood at the harvest stage and there is evidence of potential impacts and disruption to supply chains. Yet, there currently is no strong driver for change higher up the chain. Holistic adaptation planning along the supply chain, underpinned by targeted information and policy for the catch, processing and distribution, and marketing phases is needed. This effort is needed now, as some adaptation options have long lead times, and a delay in adaptation planning may limit future options. Given potential lead times and associated uncertainty, a risk-based approach is recommended with regard to adaptation planning for Australia’s seafood sector.

  11. Enterobacter siamensis sp. nov., a transglutaminase-producing bacterium isolated from seafood processing wastewater in Thailand.

    Science.gov (United States)

    Khunthongpan, Suwannee; Bourneow, Chaiwut; H-Kittikun, Aran; Tanasupawat, Somboon; Benjakul, Soottawat; Sumpavapol, Punnanee

    2013-01-01

    A novel strain of Enterobacter, C2361(T), a Gram-negative, non-spore-forming, rod-shaped and facultative anaerobic bacterium with the capability to produce transglutaminase, was isolated from seafood processing wastewater collected from a treatment pond of a seafood factory in Songkhla Province, Thailand. Phylogenetic analyses and phenotypic characteristics, including chemotaxonomic characteristics, showed that the strain was a member of the genus Enterobacter. The 16S rRNA gene sequence similarities between strain C2361(T) and Enterobacter cloacae subsp. cloacae ATCC 13047(T) and Enterobacter cloacae subsp. dissolvens LMG 2683(T) were 97.5 and 97.5%, respectively. Strain C2361(T) showed a low DNA-DNA relatedness with the above-mentioned species. The major fatty acids were C16:0, C17:0cyclo and C14:0. The DNA G+C content was 53.0 mol%. On the basis of the polyphasic evidence gathered in this study, it should be classified as a novel species of the genus Enterobacter for which the name Enterobacter siamensis sp. nov. is proposed. The type strain is C2361(T) (= KCTC 23282(T) = NBRC 107138(T)).

  12. 海鲜类香精的调配%Compounding of seafood flavoring

    Institute of Scientific and Technical Information of China (English)

    刘华; 季大伟

    2011-01-01

    According to the market demand for the seafood flavorings, we chose suitable materials and adopted different techniques including Maillard reaction and perfumery technology to blend savory flavors. Enzyme hydrolysis, extracts and Millard materials were used. The crab flavor, seaweed flavor and tuna fish flavor were used as examples showing the processing of compounding natural reaction flavor and volatile fragrance to meet the requirement for seafood flavor. The sea food enzymatic hydrolysis and Millard reaction were briefly discussed.%根据市场对海鲜类咸味香精的要求,选取合适的已开发原料,运用不同的加工技术,包括美拉德反应技术和调香师的调香技术研发出适合市场需要的各类海鲜香精.并简单涉及到酶解物,萃取物和反应物.通过天然反应香精和头香香气的完美搭配来体现海鲜的头香和口味一致性.本文仅探讨几个具有一般代表性的海鲜香精:蟹味,海苔和金枪鱼香精,同时简单叙述了海鲜酶解物以及海鲜反应物的生产工艺流程及要点.

  13. Forensic assignment to geographic origin, a useful tool in seafood fraud control.

    Science.gov (United States)

    Horreo, J L; Machado-Schiaffino, G; García-Vázquez, E

    2017-03-01

    Seafood fraud is an economically motivated and widely spread problem encompassing drastic consequences in both public health and species conservation. In Northern Spain, only the first Atlantic salmon (Salmo salar) catch of the angling season (named Campanu) can be sold. In the year 2011, an angler denounced it on regional Court claiming that the Campanu (which was sold in 6000€) was fraudulent because it had been caught from another river than the fisherman ("the seller") stated. Here, we report the first judicial case of application of geographical genetic assignment in a fish species in Spain. In order to accomplish this, genetic assignments to their rivers of origin of the Campanu and another three following salmon catches of the angling season of the year 2011 were performed. A panel of eight microsatellite loci together with a comprehensive genetic baseline of the rivers of the region were employed. Results showed that the Campanu was the only case in which genetic assignment and fisherman declaration of the river of origin did not match. The methodology here employed showed to be very useful as a reinforcement of other evidences contributing to fight against seafood fraud in Courts.

  14. Humans seem to produce arsenobetaine and dimethylarsinate after a bolus dose of seafood

    DEFF Research Database (Denmark)

    Molin, M.; Ulven, S.M.; Dahl, L.

    2012-01-01

    of arsenicals of health concern. The present controlled dietary study examined the urinary excretion of arsenic compounds (total arsenic (tAs), iAs, AB (arsenobetaine), dimethylarsinate (DMA) and methylarsonate (MA)) following ingestion of a single test meal of seafood (cod, 780μg tAs, farmed salmon, 290μg t......As or blue mussel, 690μg tAs or potato (control, 110μg tAs)) in 38 volunteers. The amount of ingested tAs excreted via the urine within 0–72h varied significantly among the groups: Cod, 74% (52–92%), salmon 56% (46–82%), blue mussel 49% (37–78%), control 45% (30–60%). The estimated total urinary excretion...... in the different groups). Although the ingested amount of iAs+DMA+MA was low for all seafood groups (1.2–4.5% of tAs ingested), the urinary DMA excretion was high in the blue mussel and salmon groups, counting for 25% and 11% of the excreted tAs respectively. In conclusion our data indicate a possible formation...

  15. Edible protein energy return on investment ratio (ep-EROI) for Spanish seafood products.

    Science.gov (United States)

    Vázquez-Rowe, Ian; Villanueva-Rey, Pedro; Moreira, M Teresa; Feijoo, Gumersindo

    2014-04-01

    Life cycle assessment (LCA) has developed into a useful methodology to assess energy consumption of fishing fleets and their derived seafood products, as well as the associated environmental burdens. In this study, however, the life cycle inventory data is used to provide a dimensionless ratio between energy inputs and the energy provided by the fish: the edible protein energy return on investment (ep-EROI). The main objective was to perform a critical comparison of seafood products landed in Galicia (NW Spain) in terms of ep-EROI. The combination of energy return on investment (EROI) with LCA, the latter having standardized mechanisms regarding data acquisition and system boundary delimitation, allowed a reduction of uncertainties in EROI estimations. Results allow a deeper understanding of the energy efficiency in the Galician fishing sector, showing that small pelagic species present the highest ep-EROI values if captured using specific fishing techniques. Finally, results are expected to provide useful guidelines for policy support in the EU's Common Fisheries Policy.

  16. Relationship between Listeria monocytogenes and Listeria spp. in seafood processing plants.

    Science.gov (United States)

    Alali, Walid Q; Schaffner, Donald W

    2013-07-01

    The objective of this study was to evaluate the relationship between prevalence of Listeria monocytogenes as an outcome and Listeria spp. as an explanatory variable by food products, food contact surfaces, and nonfood contact surfaces in seafood processing plants by using peer-reviewed published data. Nine sets of prevalence data of L. monocytogenes and Listeria spp. were collected from published studies and used for the analyses. Based on our analysis, the relationship between L. monocytogenes prevalence and Listeria spp. prevalence in food products (incoming raw materials and finish products) was significant (P = 0.04) with (low) R² = 0.36. Furthermore, Listeria spp. were not a good indicator for L. monocytogenes when testing food contact surfaces (R² = 0.10). Listeria spp. were a good indicator for L. monocytogenes only on nonfood contact surfaces (R² = 0.90). On the other hand, the presence of Listeria spp. on food contact surfaces (R² = 0.002) and nonfood contact surfaces (R² = 0.03) was not a good indicator for L. monocytogenes presence in food products. In general, prevalence of Listeria spp. does not seem to be a good indicator for L. monocytogenes prevalence in seafood processing plants.

  17. Determination of chlorate and chlorite and mutagenicity of seafood treated with aqueous chlorine dioxide.

    Science.gov (United States)

    Kim, J; Marshall, M R; Du, W X; Otwell, W S; Wei, C I

    1999-09-01

    The use of chlorine dioxide (ClO(2)) as a potential substitute for aqueous chlorine to improve the quality of seafood products has not been approved by regulatory agencies due to health concerns related to the production of chlorite (ClO(2)(-)) and chlorate (ClO(3)(-)) as well as possible mutagenic/carcinogenic reaction products. Cubes of Atlantic salmon (Salmo salar) and red grouper (Epinephelus morio) were treated with 20 or 200 ppm aqueous chlorine or ClO(2) solutions for 5 min, and extracts of the treated fish cubes and test solutions were checked for mutagenicity using the Ames Salmonella/microsome assay. No mutagenic activity was detected in the treated fish samples or test solutions with ClO(2). Only the sample treated with 200 ppm chlorine showed weak mutagenic activity toward S. typhimurium TA 100. No chlorite residue was detected in sea scallops, mahi-mahi, or shrimp treated with ClO(2) at 3.9-34.9 ppm. However, low levels of chlorate residues were detected in some of the treated samples. In most cases, the increase in chlorate in treated seafood was time- and dose-related.

  18. Determination of total mercury in seafood and other protein-rich products

    Energy Technology Data Exchange (ETDEWEB)

    Landi, S.; Fagioli, F.; Locatelli, C. [Universita di Ferrara (Italy)

    1992-11-01

    A previously developed wet-digestion method for the determination of total mercury in plants by cold vapor atomic absorption spectroscopy (CVAAS) was extended to the analysis of seafood and other products rich in proteins. Oxidation of matrixes is accomplished by K{sub 2}Cr{sub 2}O{sub 7} in the presence of diluted H{sub 2}SO{sub 4}; a simple air condenser is used to reflux vapors released from the boiling mixture. The original procedure (A) and 2 modifications (B and C), which differ with respect to the mode of acidification and/or digestion time and the types of condensers used, were compared for precision and accuracy by means of National Institute of Standards and Technology Research Material 50 Albacore Tuna and proved to be reliable (Hg present, 0.95{plus_minus}0.1 {mu}g/g; Hg found, 0.97 {plus_minus} 0.029 {mu}g/g [A], 0.98 {plus_minus} 0.018 {mu}g/g [B], and 0.94 {plus_minus} 0.025 {mu}g/g [C]). The modified procedures were tested further in Hg recovery experiments on a variety of biological matrixes with different spiking substances and again showed good analytical characteristics (overall average recoveries = 98 {plus_minus} 5.1% for seafood and 100 {plus_minus} 3.6 for protein-rich baby foods). 22 refs., 1 fig., 5 tabs.

  19. Mussels (Mytilus galloprovincialis) as a bio-indicator species in radioactivity monitoring of Eastern Adriatic coastal waters.

    Science.gov (United States)

    Krmpotić, Matea; Rožmarić, Martina; Barišić, Delko

    2015-06-01

    Croatian Adriatic coastal waters are systematically monitored within the Mediterranean Mussel Watch Project using mussels (Mytilus galloprovincialis) as a bio-indicator species. The study includes determination of naturally occurring ((7)Be, (40)K, (232)Th, (226)Ra and (238)U), as well as anthropogenic (137)Cs radionuclides. Activity concentrations in dry weight of mussels' soft tissue along the Croatian Adriatic coast are presented, with spatial and seasonal variations given and discussed. Samples were collected in spring and autumn for the period between 2009 and 2013. Radionuclides were determined by gamma-ray spectrometry. Activity concentrations of (7)Be were the highest in spring periods, especially in the areas with significant fresh water discharges. Activity concentrations of (40)K did not vary significantly with season or location. (137)Cs activities were low, while (232)Th, (226)Ra and (238)U activities were mostly below the detection limit of performed gamma-spectrometric measurement.

  20. Biogeochemical processes in sediments of the Manfredonia Gulf (Southern Adriatic Sea: early diagenesis of carbon and nutrient and benthic exchange

    Directory of Open Access Journals (Sweden)

    P. Giordano

    2004-10-01

    Full Text Available In order to understand the mechanisms responsible of the recycle of carbon and nutrients at the sediment-water interface and to understand the role of sediments in nutrients mass balance in coastal water, cores were collected (pore waters and solid phases and benthic fluxes (oxygen, dissolved nutrients, dissolved iron and managanese, alkalinity and TCO2 were measured in two stations in the Gulf of Manfredonia (Southern Adriatic Sea. Stations were chosen to include a site, in the offshore part of the gulf, under the influence of western Adriatic current and another site, in the inner part of the gulf, under influence of gyres occurring inside the gulf. Both stations were placed in areas characterized by high sedimentation rate. Fluxes at sediment water interface show higher values in S2 site during the summer. Bio-irrigation seems to be the main transport mechanism characterizing both sites, with more evident effects during summer in S1 site.

  1. {sup 210}Pb dating of sediments from the central and northern Adriatic Sea: deposition and preservation of sedimentary organic carbon

    Energy Technology Data Exchange (ETDEWEB)

    Hamilton, T. F., LLNL

    1998-04-01

    Lead-210 ({sup 21O}Pb) and organic C depth distribution profiles in sediments from the northern and central Adriatic Sea were measured as part of the EEC funded project on Eutrophic Limits of the Northern Adriatic (ELNA). {sup 210}Pb derived mass-accumulation rates decrease southward from between 0.15 and 0.2 g cm{sup -2}y{sup -1} close to the Po River outflow (> 24 m, water depth) to less than 0.04 g cm{sup -2}y{sup -1} in the Jabuka Pit (246 m, water depth) in the central Adriatic Sea. The mass- accumulation rates obtained in the Jabuka Pit correspond to mean sedimentation rates of about 0.03 cm y{sup -1} (ref. porosity = 0.5) and fall between 5 to 20 times lower than rates found for north Adriatic shelf cores. Estimated sedimentation rates are considered as upper limits because of the possible effects of bioturbation and physical disturbance on the {sup 21O}Pb sedimentary record but are consistent with data from previous work. Rates of sediment accumulation and carbon burial appear to be strongly influenced by the transport of fluvial materials from land and transport of fine-grained particles. First-order estimates of organic C burial rates into surface sediment ranged from 1 to 0.028 mMol cm{sup -2}y{sup -1} between the Po delta and the Jabuka Pit regions, respectively. We estimate that a maximum of 50% of organic C preserved in surface sediment may be derived from biological production in the overlying water column.

  2. Selecting the Location of a Nautical Tourism Port by Applying PROMETHEE And GAIA Methods Case Study – Croatian Northern Adriatic

    OpenAIRE

    Mirjana Kovačić

    2010-01-01

    In this paper, the author presents the multi-criteria analysis methods, PROMETHEE I and II and GAIA, used for selecting the location of a nautical tourism port. In an example of the selected location of a nautical tourism port in the Northern Adriatic, the author has used an analytic and graphical evaluation for solving such a problem. Particular attention has been paid to the use of GAIA method, which is suitable for visualisation of the problem characteristics through geometrical interpreta...

  3. Long-term variability of the South Adriatic circulation and phytoplankton biomass in relation to large-scale climatic pattern

    Directory of Open Access Journals (Sweden)

    L. Shabrang

    2015-02-01

    Full Text Available The interannual variability of the South Adriatic Gyre and its relation to the wind vorticity and the large-scale climatic pattern (North Atlantic Oscillation – NAO, was studied using the time-series of satellite altimetry data and ocean surface wind products. The cyclonic circulation observed in the South Adriatic area was mainly sustained by the local wind forcing, as suggested by the positive correlation between the rate of change of the current vorticity and the wind-stress vorticity. Nevertheless, the influence of vorticity advection from the adjacent area (North Ionian Sea cannot be ignored and it is more significant during the anticyclonic phase of Adriatic–Ionian Bimodal Oscillation System. The geostrophic current vorticities of the South Adriatic and North Ionian Seas are correlated with a time lag of 15 months, which corresponds to an advection speed of ~1 cm s−1. The different wind patterns observed during the two NAO phases revealed a stronger positive vorticity during the negative NAO phase. Conversely, during the positive NAO phase the wind vorticity is characterized by lower positive values. Subsequently, the calculated positive linear correlation between the NAO index and the frequency of the cold and dry northerly wind suggests the strengthening of the winter convection, and of the consecutive deep water formation, during the positive NAO phases. As a consequence of the winter deep convection, Southern Adriatic area is characterized by the late winter/early spring algal blooms. Relationship between the spatially averaged surface chlorophyll concentrations and the northerly wind frequencies revealed that the two biological productivity regimes likely exist: the subtropical one and the subpolar one depending on the frequency of windy days. We also showed that the bloom timing is a linear function of the wind frequency and can vary within the range of almost two months. This study thus contributes to our understanding of the

  4. Studies on phycobiliproteins in Algae. VI. Light-harvesting phycobiliprotein pigments in some Rhodophyta from the Adriatic Sea

    Directory of Open Access Journals (Sweden)

    Bazyli Czeczuga

    2014-02-01

    Full Text Available The phycobiliprotein content in 5 species of red algae from the coast of the Adriatic Sea' was studied by chromatography on Sephadex G-100. The phycobiliproteins, R-phycoerythrin, C-phycocyanin and allophycocyanin were identified. The total content of phycobiliproteins ranged from 0.152 (Phyllophora nervosa to 1.874 mg•g-1 dry wt. (Plocamium cartilagineum. The dominant phycobiliproteins were found to belong to the phycocyanin group, this resulting from complementary chromatic adaptation.

  5. Use of small diameter column particles to enhance HPLC determination of histamine and other biogenic amines in seafood

    DEFF Research Database (Denmark)

    Simat, Vida; Dalgaard, Paw

    2011-01-01

    Pre-column and post-column HPLC derivatization methods were modified and evaluated for the identification and quantification of nine biogenic amines in seafood Two HPLC methods with column particles of 1 8 mu m or 3 mu m in diameter were modified and compared to classical methods using 5 mu m col...

  6. A set of sustainability performance indicators for seafood : direct human consumption products from Peruvian anchoveta fisheries and freshwater aquaculture

    OpenAIRE

    2015-01-01

    Different seafood products based on Peruvian anchoveta (Engraulis ringens) fisheries and freshwater aquaculture of trout (Oncorhynchus mykiss), tilapia (Oreochromis spp.) and black pacu (Colossoma macropomum), contribute at different scales to the socio-economic development, environmental degradation and nutrition of the Peruvian population. Various indicators have been used in the literature to assess the performance of these industries regarding different aspects of sustainability, notably ...

  7. Fishing management scenarios to rebuild exploited resources and ecosystems of the Northern-Central Adriatic (Mediterranean Sea)

    Science.gov (United States)

    Fouzai, Nadia; Coll, Marta; Palomera, Isabel; Santojanni, Alberto; Arneri, Enrico; Christensen, Villy

    2012-10-01

    We examined various fishing management options to recover exploited marine resources and ecosystems of the Northern-Central Adriatic Sea. Dynamic simulations were based on a spatial ecological model previously calibrated with time series of data. Scenarios regarding spatial management were evaluated with the establishment of two marine protected areas, respectively, in the Pomo pit and the northern region. In addition, three temporal simulations of temporary closures and overall reduction of fishing effort of demersal and pelagic fleets (bottom, mid-water trawls and purse seines) were also considered. Simulations were run for 45 years (1975-2020), including the calibration period (1975-2002), and changes in biomass and catch of marine resources were analyzed. Our results confirm that current fishing management in the Adriatic Sea does not have clear beneficial impacts for the recovery of exploited resources, which will remain depleted in 2020 if "business as usual" continues. Simulations of alternative management suggest that both protected areas could be beneficial for fish population recovery predicting an increase in the biomass of commercial fish and predatory organisms. Simulations of temporary closures and overall reduction of fishing effort also show significant benefits for several commercial resources. We argue that both management measures may be effective tools to recover exploited ecosystems of the Northern-Central Adriatic Sea and halt the decline of marine resources.

  8. The role of solar and wind energy in sustainable development of the Adriatic Marco region in Croatia

    Energy Technology Data Exchange (ETDEWEB)

    Hrastnik, B. [Hrvoje Pozar Energy Inst., Zagreb (Croatia)

    1999-07-01

    Aggregated energy demand in the Adriatic region, as well as the specific demand of individual sectors like industry, tourism, residential and commercial sector and agriculture has been assessed. Seasonal and daily load characteristics of the thermal and electric energy consumption in the Adriatic macro-region, as applied for heating, cooling and electrical appliances are discussed. Optimal mix of energy carrier (fossil and renewable) covering thermal and electric demand in the region is proposed. It has been shown that present regional energy mix, particularly for thermal applications based on electric energy, can be modified in favor of other energy carriers like LPG, LNG, hydropower, solar and wind energy, which are more appropriate for the sustainable development of the region. The expected market penetration of flat plate collectors, power plants with line focusing collectors, wind parks, photovoltaic power plants (off grid and grid connected) and passive use of solar radiation in commercial and residential buildings is given in the outlines. Based on the low energy consumption and seasonal/daily load characteristics, latest by the year 2050, it could be expected that renewables, at least for a number of Adriatic islands, could by nearly 100% substitute the present use of fossil sources, supplying electricity and thermal energy. (author)

  9. Diet-induced obesity, energy metabolism and gut microbiota in C57BL/6J mice fed Western diets based on lean seafood or lean meat mixtures.

    Science.gov (United States)

    Holm, Jacob Bak; Rønnevik, Alexander; Tastesen, Hanne Sørup; Fjære, Even; Fauske, Kristin Røen; Liisberg, Ulrike; Madsen, Lise; Kristiansen, Karsten; Liaset, Bjørn

    2016-05-01

    High protein diets may protect against diet-induced obesity, but little is known regarding the effects of different protein sources consumed at standard levels. We investigated how a mixture of lean seafood or lean meat in a Western background diet modulated diet-induced obesity, energy metabolism and gut microbiota. Male C57BL/6J mice fed a Western diet (WD) containing a mixture of lean seafood (seafood WD) for 12weeks accumulated less fat mass than mice fed a WD containing a mixture of lean meat (meat WD). Meat WD-fed mice exhibited increased fasting blood glucose, impaired glucose clearance, elevated fasting plasma insulin and increased plasma and liver lipid levels. We observed no first choice preference for either of the WDs, but over time, mice fed the seafood WD consumed less energy than mice fed the meat WD. Mice fed the seafood WD exhibited higher spontaneous locomotor activity and a lower respiratory exchange ratio (RER) than mice fed the meat WD. Thus, higher activity together with the decreased energy intake contributed to the different phenotypes observed in mice fed the seafood WD compared to mice fed the meat WD. Comparison of the gut microbiomes of mice fed the two WDs revealed significant differences in the relative abundance of operational taxonomic units (OTUs) belonging to the orders Bacteroidales and Clostridiales, with genes involved in metabolism of aromatic amino acids exhibiting higher relative abundance in the microbiomes of mice fed the seafood WD.

  10. Chemical and biological contamination of fish products; Contaminazione chimica e biologica dei prodotti della pesca. Corso tenuto presso l`Istituto Superiore di Sanita`, Roma, 1-2 giugno 1994

    Energy Technology Data Exchange (ETDEWEB)

    Stacchini, Angelo [Istituto Superiore di Sanita`, Rome (Italy). Lab. Alimenti

    1997-03-01

    The first contribution deals with chemical contaminants, particularly heavy metals and their acceptable daily intake (ADI). The following contributions deals with sanitary measures concerning biological contamination associated with the consumption of seafood, especially shellfish, taking into consideration the epidemiological relevance of some biological contaminants in Italy and Europe. Particular sanitary aspects concerning the presence of enteric viruses in mussels are presented; new molecular biology methodologies and the different techniques for enteroviruses concentration are discussed. Some questions concerning the detection of algal bio toxins are shown, based on the experience recently acquired by the Istituto Superiore di Sanita` about the biological methods. The current chromatographic methods for PSP and DSP biotoxin determination and the most recent developments in chemical methods based on liquid chromatography and mass spectrometric techniques are presented. The last section is devoted to the parasitic contamination of seafood.

  11. Application of a toxicity test battery integrated index for a first screening of the ecotoxicological threat posed by ports and harbors in the southern Adriatic Sea (Italy).

    Science.gov (United States)

    Manzo, Sonia; Schiavo, Simona; Aleksi, Pellumb; Tabaku, Afrim

    2014-11-01

    Ports and harbors may represent a threat for coastal ecosystems due to pollutant inputs, especially those derived from maritime activities. In this study, we report a first assessment of the ecotoxicological threat posed by six ports and harbors of opposite coastal regions, Apulia and Albania, in the southern Adriatic Sea (Italy). A bioassay battery consisting of four different species representing different trophic levels, algae Dunaliella tertiolecta, bacteria Vibrio fischeri, crustacean Artemia salina, and echinoids Paracentrotus lividus, has been used to assess sediment elutriates, pore waters, and sediment suspensions. Two different approaches of toxicity data integration, worst case and integrated index, have been used to determine the most appropriate procedure for the investigated sites. All sites with the worst case approach showed high toxicity levels. The chronic test with algae was the most sensitive identifying the highest effects in the battery. This effect can be attributable to contaminants derived from antifouling paints. The sediments, evaluated with V. fischeri test, often showed toxicity not found in the aqueous matrices of the same sites and that can be mainly linked to organic compounds. The test battery used in this study allowed us to perform a preliminary screening of the ecotoxicological risk of the studied area. In fact, the species utilized for toxicity tests responded differently to the investigated samples, showing different sensitivity. The test battery integrated index did not allow highlighting the differences among the sites and showed a general high ecotoxicological risk. A larger number of tests with higher sensitivity together with a tailored attribution of weights to endpoints and matrices will improve the final site evaluation.

  12. Submarine landslides in the Southern Adriatic basin: good candidates for potential paleoseismic analysis.

    Science.gov (United States)

    Dalla Valle, Giacomo; Trincardi, Fabio; Foglini, Federica; Campiani, Elisabetta; Pellegrini, Claudio

    2016-04-01

    The Plio-Pleistocene sedimentary succession of the western continental margin that surround the Southern Adriatic basin mainly consists of contourite depositional systems. The architectural stacking pattern of the contourites-linked bodies is sometimes interrupted by the presence of large-scale mass-transport complexes (MTCs). MTCs are spatially diffused along the margin and are characterized by high variability in size, morphology and geometries. In the northern sector of the margin MTCs derive from the remobilisation of upper-slope contourite drifts, whereas in the southern sector of the margin sedimentary instability involves shelf-margin, progradational deposits. The most prominent MTC of the northern sector of the margin is the Gondola Slide (GS) a large, deep-seated MTC composed of at least three distinct MTDs involving up to 40km3 of sediments. The events that have generated these MTDs have been enclosed within a robust chronological framework using sedimentary shallow piston-cores collected along the continental slope. The reconstruction of the age of these MTDs indicates that failures have repeatedly occurred along the margin during at least the last 55,000 years. Therefore, the GS case indicates that sediment instability processes can span a large portion of a sea-level cycle, pointing to triggering mechanisms that are independent from variations in the relative sea level position. The repeated GS failure events are therefore interpreted to be mainly triggered by earthquake shocks. The Southern Adriatic basin represents a seismically active area and earthquakes are generally cluster along long-lived shear zones. One of these zones, the Gondola Zone, which run across the shelf and the slope, close to the GS-MTC, has been site of paleoseismology analysis, indicating recent (younger than 5.5 kyr) tectonic deformation through E-W strike-slip faulting . Basin-scale MTDs characterize also the southern sector of the continental margin. MTDs are present both

  13. Recognizing and Preventing Overexposure to Methylmercury from Fish and Seafood Consumption: Information for Physicians

    Directory of Open Access Journals (Sweden)

    Susan M. Silbernagel

    2011-01-01

    Full Text Available Fish is a valuable source of nutrition, and many people would benefit from eating fish regularly. But some people eat a lot of fish, every day or several meals per week, and thus can run a significant risk of overexposure to methylmercury. Current advice regarding methylmercury from fish consumption is targeted to protect the developing brain and nervous system but adverse health effects are increasingly associated with adult chronic low-level methylmercury exposure. Manifestations of methylmercury poisoning are variable and may be difficult to detect unless one considers this specific diagnosis and does an appropriate test (blood or hair analysis. We provide information to physicians to recognize and prevent overexposure to methylmercury from fish and seafood consumption. Physicians are urged to ask patients if they eat fish: how often, how much, and what kinds. People who eat fish frequently (once a week or more often and pregnant women are advised to choose low mercury fish.

  14. Separating the effects of age, period and birth cohort on seafood consumption in Norway

    DEFF Research Database (Denmark)

    Scholderer, Joachim; Trondsen, Torbjørn; Lund, Eiliv

    Effects of age, period and birth cohort on consumption of fat fish, lean fish and processed fish were estimated based on panel data from the Norwegian Women and Seafood Consumption Study (NOWAC). Cohorts selected for the present analysis were women born between 1951 and 1966. Survey questionnaires...... fish increased between 1996 and 2001, while consumption of lean fish decreased. All three period effects were stable across birth cohorts. Estimation of polynomial contrasts indicated that birth cohort itself had linear effects on consumption, with older generations consuming significantly more fat...... and lean fish, but less processed fish than younger generations. Finally, the effects of cohort and period on consumption of lean and processed fish remained stable when biological age was controlled for, whilst the effect of period on fat fish consumption vanished. Regarding total consumption of fat fish...

  15. Age, period, or birth cohort: What determines demographic differences in seafood consumption?

    DEFF Research Database (Denmark)

    Scholderer, Joachim; Lund, Eiliv; Trondsen, Torbjørn

    Effects of age, period and birth cohort on consumption of fat fish, lean fish and processed fish were estimated based on panel data from the Norwegian Women and Seafood Consumption Study (NOWAC). Cohorts selected for the present analysis were women born between 1951 and 1966. Survey questionnaires...... fish increased between 1996 and 2001, while consumption of lean fish decreased. All three period effects were stable across birth cohorts. Estimation of polynomial contrasts indicated that birth cohort itself had linear effects on consumption, with older generations consuming significantly more fat...... and lean fish, but less processed fish than younger generations. Finally, the effects of cohort and period on consumption of lean and processed fish remained stable when biological age was controlled for, whilst the effect of period on fat fish consumption vanished. Regarding total consumption of fat fish...

  16. Performance of laboratories in speciation analysis in seafood – Case of methylmercury and inorganic arsenic

    DEFF Research Database (Denmark)

    Baer, Ines; Baxter, Malcolm; Devesa, Vicenta;

    2011-01-01

    The international measurement evaluation program (IMEP) has together with the European Reference Laboratory for Heavy Metals in Feed and Food (EU-RL-HM) carried out two interlaboratory comparisons (ILC) in 2010 on the measurement of trace metals, as well as methylmercury and inorganic arsenic...... in seafood. In IMEP-109 only EU National Reference Laboratories (NRL) took part, while IMEP-30 was open to all laboratories. In this article only methylmercury and inorganic arsenic analysis will be discussed, as these appear generally to be more problematic measurands. They are also particularly interesting...... arsenic analysis. Results for inorganic arsenic were spread, but not method dependant. The measurand seems to be difficult to analyse in this matrix and possible method issues were identified. Methylmercury results were satisfactory, but not many laboratories perform this type of analysis because...

  17. Microbial risk assessment of Vibrio spp. in seafood products in Mexico

    Directory of Open Access Journals (Sweden)

    Karla M López-Hernández

    2014-05-01

    Full Text Available Food-borne diseases are among the major public health problems that currently exist. Microbiological risk assessment is a process used to evaluate the hidden hazards in food, the likelihood of exposure to these hazards and their impact on public health. Risk assessment is performed in four steps: hazard identification, hazard characterization, assessment of exposure and risk characterization. According to the process/response microbial risk assessment is classified in two categories, qualitative and quantitative. The aim of this review is to underline the importance of implementing assessments in seafood that is usually consumed raw, strengthening access to good quality and safe food for the consumer’s benefit and to stress the necessity of microbiological risks assessments in Mexico.

  18. [Microbial risk assessment of Vibrio spp. in seafood products in Mexico].

    Science.gov (United States)

    López-Hernández, Karla M; Pardío-Sedas, Violeta T; Williams, José de Jesús

    2014-01-01

    Food-borne diseases are among the major public health problems that currently exist. Microbiological risk assessment is a process used to evaluate the hidden hazards in food, the likelihood of exposure to these hazards and their impact on public health. Risk assessment is performed in four steps: hazard identification, hazard characterization, assessment of exposure and risk characterization. According to the process/response microbial risk assessment is classified in two categories, qualitative and quantitative. The aim of this review is to underline the importance of implementing assessments in seafood that is usually consumed raw, strengthening access to good quality and safe food for the consumer's benefit and to stress the necessity of microbiological risks assessments in Mexico.

  19. Synthesis of Seafood Catch, Distribution, and Consumption Patterns in the Gulf of Mexico Region

    Energy Technology Data Exchange (ETDEWEB)

    Steimle and Associates, Inc.

    1999-08-16

    The purpose of this task was to gather and assemble information that will provide a synthesis of seafood catch, distribution and consumption patterns for the Gulf of Mexico (GOM) region. This task was part of a U.S. Department of Energy (DOE)-sponsored project entitled ''Environmental and Economic Assessment of Discharges from Gulf of Mexico Region Oil and Gas Operations.'' Personal interviews were conducted with a total of 905 recreational fishermen and 218 commercial fishermen (inclusive of shrimpers, crabbers, oystermen and finfishermen) in Louisiana and Texas using survey questionnaires developed for the study. Results of these interviews detail the species and quantities caught, location of catch, mode of fishing, distribution of catch, family consumption patterns and demographics of the fishermen.

  20. Synergistic effect of ionizing radiation on chemical disinfectant treatments for reduction of natural microflora on seafood

    Science.gov (United States)

    Kim, Hyunjoo; Ha, Ji-Hyoung; Lee, Ju-Woon; Jo, Cheorun; Ha, Sang-Do

    2012-08-01

    The purpose of this study was to determine whether combined treatments would produce synergistic disinfection effects on seafood products such as mussel and squid compared with single treatments. We investigated the bactericidal effects of chlorine and ionizing radiation on the natural microflora of mussel and squid. Total aerobic bacteria initially ranged from 102 to 104 Log CFU/g. More than 100 ppm of chlorine and irradiation at 1 kGy were sufficient to reduce the total aerobic bacteria on mussel and squid to a level lower than detection limit (10 CFU/g). Synergistic effects against natural microflora were observed for all combined treatment. These results suggest that a significant synergistic benefit results from combine chlorine-ionizing radiation treatment against natural microflora on mussel and squid.

  1. Organochlorine compounds (PCBs, PCDDs and PCDFs) in seafish and seafood from the Spanish Atlantic Southwest Coast.

    Science.gov (United States)

    Bordajandi, L R; Martín, I; Abad, E; Rivera, J; González, M J

    2006-08-01

    Concentrations and congener specific profiles of PCDD/Fs and PCBs were determined in edible fish and seafood species from the Coast of Huelva, in the Spanish southwest Atlantic coast. Five fish species, namely wegde sole (Dicologoglossa cuneata), common sole (Solea vulgaris), white seabream (Diplodus sargus), sardine (Sardina pilchardus), angler fish (Lophius piscatorius), two shellfish species (Donax trunculus and Chamelea gallina), common cuttlefish (Sepia officinalis) and prawns (Parapenaeus longirostris), frequently found and consumed in the area were analysed. Concentrations ranged from 861 to 23787pg/g wet weight for total PCBs, while 2,3,7,8-PCDD/Fs showed concentrations ranging from 0.2 to 1.18pg/g wet weight. WHO-TEQ concentrations ranged from 0.038 to 0.186pg WHO-TEQ(PCDD/Fs)/g wet weight, values well below the maximum concentrations established by the EU. When non- and mono-ortho PCBs were included the values increased to a maximum of 0.99pg WHO-TEQ(PCDD/Fs+PCBs)/g wet weight. The PCB and PCDD/F accumulation pattern found in the samples analysed showed a distribution typically reported for marine samples, and no remarkable differences were found between species. The PCBs were the ones contributing with the highest percentage to the total TEQ content in most species studied. Concerning the seafood, specially prawns and shellfish, the opposite was observed and PCDD/Fs were found to contribute with a higher percentage than PCBs. The congener specific contribution to the TEQ showed PCB 126 followed by 1,2,3,7,8-PeCDD and 2,3,4,7,8-PeCDF as the most abundant ones.

  2. Estimate of the uncertainty in measurement for the determination of mercury in seafood by TDA AAS.

    Science.gov (United States)

    Torres, Daiane Placido; Olivares, Igor R B; Queiroz, Helena Müller

    2015-01-01

    An approach for the estimate of the uncertainty in measurement considering the individual sources related to the different steps of the method under evaluation as well as the uncertainties estimated from the validation data for the determination of mercury in seafood by using thermal decomposition/amalgamation atomic absorption spectrometry (TDA AAS) is proposed. The considered method has been fully optimized and validated in an official laboratory of the Ministry of Agriculture, Livestock and Food Supply of Brazil, in order to comply with national and international food regulations and quality assurance. The referred method has been accredited under the ISO/IEC 17025 norm since 2010. The approach of the present work in order to reach the aim of estimating of the uncertainty in measurement was based on six sources of uncertainty for mercury determination in seafood by TDA AAS, following the validation process, which were: Linear least square regression, Repeatability, Intermediate precision, Correction factor of the analytical curve, Sample mass, and Standard reference solution. Those that most influenced the uncertainty in measurement were sample weight, repeatability, intermediate precision and calibration curve. The obtained result for the estimate of uncertainty in measurement in the present work reached a value of 13.39%, which complies with the European Regulation EC 836/2011. This figure represents a very realistic estimate of the routine conditions, since it fairly encompasses the dispersion obtained from the value attributed to the sample and the value measured by the laboratory analysts. From this outcome, it is possible to infer that the validation data (based on calibration curve, recovery and precision), together with the variation on sample mass, can offer a proper estimate of uncertainty in measurement.

  3. Bacterial flora and antimicrobial resistance in raw frozen cultured seafood imported to Denmark.

    Science.gov (United States)

    Noor Uddin, Gazi M; Larsen, Marianne Halberg; Guardabassi, Luca; Dalsgaard, Anders

    2013-03-01

    Intensified aquaculture includes the use of antimicrobials for disease control. In contrast to the situation in livestock, Escherichia coli and enterococci are not part of the normal gastrointestinal flora of fish and shrimp and therefore not suitable indicators of antimicrobial resistance in seafood. In this study, the diversity and phenotypic characteristics of the bacterial flora in raw frozen cultured and wild-caught shrimp and fish were evaluated to identify potential indicators of antimicrobial resistance. The bacterial flora cultured on various agar media at different temperatures yielded total viable counts of 4.0 × 10(4) to 3.0 × 10(5) CFU g(-1). Bacterial diversity was indicated by 16S rRNA sequence analysis of 84 isolates representing different colony types; 24 genera and 51 species were identified. Pseudomonas spp. (23% of isolates), Psychrobacter spp. (17%), Serratia spp. (13%), Exiguobacterium spp. (7%), Staphylococcus spp. (6%), and Micrococcus spp. (6%) dominated. Disk susceptibility testing of 39 bacterial isolates to 11 antimicrobials revealed resistance to ampicillin, amoxicillin-clavulanic acid, erythromycin, and third generation cephalosporins. Resistance to third generation cephalosporins was found in Pseudomonas, a genus naturally resistant to most β-lactam antibiotics, and in Staphylococcus hominis. Half of the isolates were susceptible to all antimicrobials tested. Results indicate that identification of a single bacterial resistance indicator naturally present in seafood at point of harvest is unlikely. The bacterial flora found likely represents a processing rather than a raw fish flora because of repeated exposure of raw material to water during processing. Methods and appropriate indicators, such as quantitative PCR of resistance genes, are needed to determine how antimicrobials used in aquaculture affect resistance of bacteria in retailed products.

  4. Simple analysis of total mercury and methylmercury in seafood using heating vaporization atomic absorption spectrometry.

    Science.gov (United States)

    Yoshimoto, Keisuke; Anh, Hoang Thi Van; Yamamoto, Atsushi; Koriyama, Chihaya; Ishibashi, Yasuhiro; Tabata, Masaaki; Nakano, Atsuhiro; Yamamoto, Megumi

    2016-01-01

    This study aimed to develop a simpler method for determining total mercury (T-Hg) and methylmercury (MeHg) in biological samples by using methyl isobutyl ketone (MIBK) in the degreasing step. The fat in the samples was extracted by MIBK to the upper phase. T-Hg transferred into the water phase. This was followed by the extraction of MeHg from the water phase using HBr, CuCl2 and toluene. The MeHg fraction was reverse-extracted into L-cysteine-sodium acetate solution from toluene. The concentrations of T-Hg and MeHg were determined by heating vaporization atomic absorption spectrometry. Certified reference materials for T-Hg and MeHg in hair and fish were accurately measured using this method. This method was then applied to determine T-Hg and MeHg concentrations in the muscle, liver and gonads of seafood for the risk assessment of MeHg exposure. The mean T-Hg and MeHg concentrations in squid eggs were 0.023 and 0.022 µg/g, and in squid nidamental glands 0.052 and 0.049 µg/g, respectively. The MeHg/T-Hg ratios in the eggs and nidamental glands of squid were 94.4% and 96.5%, respectively. The mean T-Hg and MeHg concentrations in the gonads of sea urchins were 0.043 and 0.001 µg/g, respectively, with a MeHg/T-Hg ratio of 3.5%. We developed an efficient analytical method for T-Hg and MeHg using MIBK in the degreasing step. The new information on MeHg concentration and MeHg/T-Hg ratios in the egg or nidamental glands of squid and gonads of sea urchin will also be useful for risk assessment of mercury in seafood.

  5. Current Status and Future Perspectives in Research on Seafood Allergens%水产品过敏原的研究现状和展望

    Institute of Scientific and Technical Information of China (English)

    刘光明; 曹敏杰; 蔡秋凤; 沈海旺; 阮韦伟; 苏文金

    2012-01-01

    水产品作为人类食物的重要来源之一,其市场和消费群体不断扩大.与此同时,由水产品引发的食物过敏也日益增多,在联合国粮农组织公布的八大类过敏食物中,水产品就占了两大类.水产品过敏原有小清蛋白(Parvalbumin)、鱼卵蛋白(如鲑鱼的硫酸鱼精蛋白)和胶原蛋白(Collagen)、原肌球蛋白(Tropomyosin,TM)、精氨酸激醇(Arginine kinase)、肌球蛋白轻链(Myosin light chain)、肌钙结合蛋白(Sarcoplasmic calcium binding protein)、血蓝蛋白亚基(Hemocyanin subunits)等.基于此,本文重点概述了国内外水产品过敏原及其加工脱敏技术的研究现状,以及今后水产品过敏原研究的发展趋势.%Seafood plays an important role in human nutrition and health. The growing international trade in seafood species and products has enhanced the popularity and frequency of consumption of various seafood products across many countries. This increased production and consumption of seafood has been accompanied by more frequent reports of adverse health problems among consumers as well as processors of seafood. Adverse reactions to seafood are often mediated by the immune system and cause allergies. Seafood accounted for two categories in the eight categories of allergic foods which announced by Food and Agriculture Organization of the United Nations. Allergic reactions to seafood can generate clinical symptoms ranging from mild urticaria and oral allergy syndrome to life-threatening anaphylactic reactions. The major seafood allergens are parvalbumin and tropomyosin, although other allergens may play an important part in hyper-sensitivity such as collagen, and arginine kinase, myosin light chain, sarcoplasmic calcium binding protein. Current observations regard parvalbumin and tropomyosin to be the major allergens responsible for molecular and clinical cross-reactivity between fish, crustaceans and mollusks. Future research on the immunological and physical and

  6. Development of climate risk services under climate change scenarios in the North Adriatic coast (Italy).

    Science.gov (United States)

    Valentina, Gallina; Silvia, Torresan; Anna, Sperotto; Elisa, Furlan; Andrea, Critto; Antonio, Marcomini

    2014-05-01

    Nowadays, the challenge for coastal stakeholders and decision makers is to incorporate climate change in land and policy planning in order to ensure a sustainable integrated coastal zone management aimed at preserve coastal environments and socio-economic activities. Consequently, an increasing amount of information on climate variability and its impact on human and natural ecosystem is requested. Climate risk services allows to bridge the gap between climate experts and decision makers communicating timely science-based information about impacts and risks related to climate change that could be incorporated into land planning, policy and practice. Within the CLIM-RUN project (FP7), a participatory Regional Risk Assessment (RRA) methodology was applied for the evaluation of water-related hazards in coastal areas (i.e. pluvial flood and sea-level rise inundation risks) taking into consideration future climate change scenarios in the case study of the North Adriatic Sea for the period 2040-2050. Specifically, through the analysis of hazard, exposure, vulnerability and risk and the application of Multi-Criteria Decision Analysis (MCDA), the RRA methodology allowed to identify and prioritize targets (i.e. residential and commercial-industrial areas, beaches, infrastructures, wetlands, agricultural typology) and sub-areas that are more likely to be affected by pluvial flood and sea-level rise impacts in the same region. From the early stages of the climate risk services development and application, the RRA followed a bottom-up approach taking into account the needs, knowledge and perspectives of local stakeholders dealing with the Integrated Coastal Zone Management (ICZM), by means of questionnaires, workshops and focus groups organized within the project. Specifically, stakeholders were asked to provide their needs in terms of time scenarios, geographical scale and resolution, choice of receptors, vulnerability factors and thresholds that were considered in the

  7. Dense water cascading, bottom currents and sediment wave formation at the exit of the Bari canyon (Southern Adriatic Sea, Italy)

    Science.gov (United States)

    Langone, Leonardo; Miserocchi, Stefano; Boldrin, Alfredo; Turchetto, Margherita; Foglini, Federica; Trincardi, Fabio

    2010-05-01

    The dense water forming in the North Adriatic (NAdDW) spreading southward along the Italian continental shelf, sinks in the Southern Adriatic basin through particular cascading events. Such events are seasonal, occurring specially in April, with variable intensity. These phenomena control the water mass mixing, the deep ocean ventilation, the behaviour of deep ecosystems, the formation of complex erosive and depositional bedforms and the abyssal export and burial of nutrients and carbon. Because of the NadDW formation is linked to climate factors (frequency, duration and size of Bura winds), the temporal variations of the NadDW dispersion into the Southern Adriatic allow to make inferences of the impact of recent climate changes on the ecosystems of the deep Mediterranean Sea. Previous research projects (EuroStrataform, HERMES) acquired a large data set of bathymetric, side-scan sonar (TOBI) and Chirp sonar profiles, which were used to build detailed morpho-bathymetric maps of the Southern Adriatic margin. There, the seabed is extremely complex, characterized by a large variety of bedforms (sediment waves, erosive scours, longitudinal furrows and giant comet marks). A branch of the cascading NAdDW is confined and accelerated through the Bari canyon where it produces a strong current capable of reaching down-slope velocities greater than 60 cm s-1 near the bottom at ~600 m of water depth, eroding the canyon thalweg and entraining large amounts of fine-grained sediment. At the exit of the canyon, in water depth greater than 800 m, the current becomes less confined, spreads laterally and generates an 80-km2-wide field of mud waves; these bedforms migrate up current and show amplitudes up to 50 m and wavelengths of about 1 km. Cruise IMPACT-09 of RV Urania was carried out in the Southern Adriatic Sea from 17-30 March 2009 with main scope of studying the impact of NadDW cascading events on the deep ecosystems of the Southern Adriatic. Experiments planned in the cruise

  8. Domoic Acid - A New Toxin in the Croatian Adriatic Shellfish Toxin Profile

    Directory of Open Access Journals (Sweden)

    Ivona Marasović

    2010-10-01

    Full Text Available This is the first study that presents concentrations of domoic acid detected in the whole shellfish tissue from breeding and harvesting areas along the Croatian coast of the Adriatic Sea during the period 2006 to 2008. Shellfish sample analyses after SAX cleaning procedures, using a UV-DAD-HPLC system, showed the presence of domoic acid in four species. The most prevalent of those species were the blue mussel (Mytilus galloprovincialis, followed by European flat oyster (Ostrea edulis, Mediterranean scallop (Pecten jacobaeus and proteus scallop (Flexopecten proteus. Domoic acid, a potentially lethal phycotoxin that causes amnesic shellfish poisoning (ASP, was detected for the first time in January 2006 with the highest value of 6.5486 μg g-1 in whole shellfish tissue. Pseudo-nitzschia spp. bloom events preceded these high domoic acid concentrations. According to this study, retention of domoic acid in the blue mussel M. galloprovincialis is more than 42 days. This investigation indicates the first presence of domoic acid in Croatian shellfish, but in concentrations under the regulatory limit (20 μg g-1, therefore shellfish consumption was not found to endanger human health.

  9. Quantification of Dissolved and Particulate Polyunsaturated Aldehydes in the Adriatic Sea

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    Raffaella Casotti

    2011-03-01

    Full Text Available Polyunsaturated aldehydes (PUA are supposed to play critical roles in chemically-mediated plankton interactions. Laboratory studies suggest that they act as mediators of chemical defense and chemical communication. PUA are oxylipins containing an α,β,γ,δ-unsaturated aldehyde structure element and are mainly found in diatoms. We present here a detailed surface mapping of PUA during a spring bloom of the diatom Skeletonema marinoi in the Adriatic Sea. We monitored dissolved PUA, as well as particulate PUA, which are produced by phytoplankton after cell disintegration. Our survey revealed a patchy distribution of PUA and shows that at most stations S. marinoi is the major contributor to the overall PUA. Our data also suggest that lysis of a diatom bloom can contribute significantly to the dissolved PUA concentrations and that other producers, which are smaller in cell size compared to diatoms, have to be taken into account as well if the total PUA content of marine samples is considered. The analyses of samples collected in deeper water suggests that diatom contribution to PUA decreases with depth, while smaller-sized unidentified organisms take place as dominant contributors to the PUA concentrations.

  10. 226Ra activity in the mullet species Liza aurata and South Adriatic Sea marine.

    Science.gov (United States)

    Antovic, N M; Antovic, I; Svrkota, N

    2010-08-01

    (226)Ra activity in the South Adriatic Sea-water, surface sediment, mud with detritus, seagrass (Posidonia oceanica) samples and the mullet (Mugilidae) species Liza aurata, as well as soil and sand from the Montenegrin Coast-was measured using the six-crystal gamma-coincidence spectrometer PRIPYAT-2M. The results are used for calculation of the absorbed (and annual effective) dose rates in air due to the (226)Ra gamma radiation. The absorbed dose rates ranged from 5.94 to 97.16 nGy h(-1) (soil) and from 0.65 to 7.65 nGy h(-1) (sand). In seawater (226)Ra activity is found to be from 0.08 to 0.15 Bq l(-1), while in whole L. aurata individuals from 0.58 to 1.97 Bq kg(-1). Annual intake of (226)Ra by human consumers of this fish species has been estimated to provide an effective dose of 0.006 mSv y(-1).

  11. Exceptional dense water formation on the Adriatic shelf in the winter of 2012

    Directory of Open Access Journals (Sweden)

    H. Mihanović

    2012-12-01

    Full Text Available We document dense water formation (DWF throughout the Adriatic shelf and coastal area in January/February 2012, resulting in record-breaking densities observed during and after the event. The unprecedented dense water generation was preconditioned by a dry and warm year which resulted in a significant reduction of coastal freshwaters, superimposed on a long-term basin-wide salinity increase. The final event that triggered the DWF was an extended period of cold weather with strong and severe winds. Record-breaking potential density anomalies (above 30 kg m−3 were measured at several DWF sites. Accumulated surface net heat and water losses in some coastal regions exceeded 1.5 GJ m−2 and 250 kg m−2 over 21 days, respectively. Excessiveness, importance of shelf-type DWF, effects on the thermohaline circulation and deep aquatic systems, and connection with climate change are discussed.

  12. Space and time variability of the surface color field in the northern Adriatic Sea

    Science.gov (United States)

    Barale, Vittorio; Mcclain, Charles R.; Malanotte-Rizzoli, Paola

    1986-01-01

    A time series of coastal zone color scanner images for the years 1979 and 1980 was used to observe the spatial and temporal variability of bio-optical processes and circulation patterns of the northern Adriatic Sea on monthly, seasonal, and interannual scales. The chlorophyll-like pigment concentrations derived from satellite data exhibited a high correlation with sea truth measurements performed during seven surveys in the summer of both years. Comparison of the mean pigment fields indicates a general increase in concentration values and larger scales of coastal features from 1979 to 1980. This variability may be linked to the different patterns of nutrient influx due to coastal runoff in the 2 years. The distribution of surface features is consistent with the general cyclonic circulation pattern. The pigment heterogeneity appears to be governed by fluctuations of freshwater discharge, while the dominant wind fields do not appear to have important direct effects. The Po River presents a plume spreading predominantly in a southeastern direction, with scales positively correlated with its outflow. The spatial scales of the western coastal layer, in contrast, are negatively correlated with this outflow and the plume scales. Both results are consistent with, and may be rationalized by, recent theoretical and experimental results involving a dynamical balance between nonlinear advection and bottom friction, with alternate predominance of one of the two effects.

  13. Partitioning of snowy and rainy precipitation in a case of a north Adriatic frontal passage

    Directory of Open Access Journals (Sweden)

    M. Monai

    2006-01-01

    Full Text Available A case of snow fall in the plains of the Northern Italian region Veneto is presented from a forecasters' perspective. Contrasting forecast guidance came from the ECMWF global model and the limited area model LAMI. The former showed a marked warm-moist Sirocco flow coming from the Adriatic Sea onto the coast at all levels, the latter discerned a distinct cold air flow from the north-east along the foothills of the Alps. The integrated observing network of the Centro Meteorologico di Teolo ARPA Veneto revealed this cold-air structure and helped the forecaster in the choice of the forecast and underpin the snowfall alert to the road authorities. It is argued that this feature is a crucial element for the occurrence of snowfall over the Veneto plains, and that the high-resolution numerical weather prediction model was essential in describing this mesoscale feature. The nature of the north-easterly flow is thought to be a combination of a Bora like flow and a barrier jet induced by flow blocking by the Alps.

  14. Southern Adriatic Sea as a Potential Area for CO2 Geological Storage

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    Volpi V.

    2015-04-01

    Full Text Available The Southern Adriatic Sea is one of the five prospective areas for CO2 storage being evaluated under the three year (FP7 European SiteChar project dedicated to the characterization of European CO2 storage sites. The potential reservoir for CO2 storage is represented by a carbonate formation, the wackstones and packstones of the Scaglia Formation (Upper Cretaceous-Paleogene. In this paper, we present the geological characterization and the 3D modeling that led to the identification of three sites, named Grazia, Rovesti and Grifone, where the Scaglia Formation, with an average thickness of 50 m, reveals good petrophysical characteristics and is overlain by an up to 1 200 thick caprock. The vicinity of the selected sites to the Enel - Federico II power plant (one of the major Italian CO2 emittor where a pilot plant for CO2 capture has been already started in April 2010, represents a good opportunity to launch the first Carbon Capture and Storage (CCS pilot project in Italy and to apply this technology at industrial level, strongly contributing at the same time at reducing the national CO2 emissions.

  15. Post-Chernobyl investigations of radiocaesium activity concentrations in Adriatic Sea pilchards.

    Science.gov (United States)

    Franić, Zdenko; Petrinec, Branko; Branica, Gina; Marović, Gordana; Kubelka, Dragan; Franić, Zrinka

    2012-08-01

    Investigations in the post-Chernobyl period (1986-2009) of radiocaesium activity concentrations in Adriatic pilchards are presented. Compared with pre-Chernobyl period, the Chernobyl nuclear accident caused increase of (137)Cs activity concentrations in pilchards. By fitting the measured (137)Cs activity concentrations to the theoretical curve was estimated to be 1.5±0.4 y for 1986-90 and 5.8±0.4 y for 1991-2009 and the bimodal behaviour for the ecological half-life of (137)Cs in pilchards has been observed. Estimated annual effective doses received by (134)Cs and (137)Cs intake due to consumption for an adult member of Croatian population are small. Collective dose for the 1986-2009 period was 4.9+0.3 person-Sv. The observed (134)Cs/(137)Cs activity ratio in pilchards was similar to the ratio that has been found in other environmental samples. The concentration factor for pilchards was roughly estimated to be 93.7±39.2 l kg(-1), which is consistent with the values observed elsewhere.

  16. Measurements and modeling of the volume scattering function in the coastal northern Adriatic Sea

    Science.gov (United States)

    Berthon, Jean-François; Shybanov, Eugeny; Lee, Michael E.-G.; Zibordi, Giuseppe

    2007-08-01

    We performed measurements of the volume scattering function (VSF) between 0.5° and 179° with an angular resolution of 0.3° in the northern Adriatic Sea onboard an oceanographic platform during three different seasons, using the multispectral volume scattering meter (MVSM) instrument. We observed important differences with respect to Petzold's commonly used functions, whereas the Fournier-Forand's analytical formulation provided a rather good description of the measured VSF. The comparison of the derived scattering, bp(λ) and backscattering, bbp(λ) coefficients for particles with the measurements performed with the classical AC-9 and Hydroscat-6 showed agreement to within 20%. The use of an empirical relationship for the derivation of bb(λ) from β(ψ,λ) at ψ=140° was validated for this coastal site although ψ=118° was confirmed to be the most appropriate angle. The low value of the factor used to convert β(ψ,λ) into bb(λ) within the Hydroscat-6 processing partially contributed to the underestimation of bb(λ) with respect to the MVSM. Finally, use of the Kopelevich model together with a measurement of bp(λ) at λ=555 nm allowed us to reconstruct the VSF with average rms percent differences between 8 and 15%.

  17. Gastrointestinal helminth community of loggerhead sea turtle Caretta caretta in the Adriatic Sea.

    Science.gov (United States)

    Gračan, Romana; Buršić, Moira; Mladineo, Ivona; Kučinić, Mladen; Lazar, Bojan; Lacković, Gordana

    2012-07-25

    We analysed the intestinal helminth community of 70 loggerhead sea turtles Caretta caretta with a curved carapace length ranging from 25 to 85.4 cm, recovered dead in neritic foraging habitats in the Adriatic Sea in 1995 to 2004. The overall prevalence of infection was high (70.0%), with a mean abundance of 36.8 helminth parasites per turtle. Helminth fauna comprised 5 trematodes (Calycodes anthos, Enodiotrema megachondrus, Orchidasma amphiorchis, Pachypsolus irroratus, Rhytidodes gelatinosus) and 3 nematodes (Sulcascaris sulcata, Anisakis spp., Hysterothylacium sp.), with 6 taxa specific for marine turtles. In terms of infection intensity and parasite abundance, O. amphiorchis was the dominant species (mean intensity: 49.8; mean abundance: 12.8), followed by R. gelatinosus (30.5 and 8.3, respectively) and P. irroratus (23.5 and 7.0, respectively), while larval Anisakis spp. exhibited the highest prevalence (34.3%). The intensity of helminth infection ranged from 1 to 302 (mean: 52.6 ± 69.1) and was not correlated with the size of turtles; this relationship held for all species, except R. gelatinosus (rS = 0.556, p sea turtles in recruited neritic grounds and the diversity of their benthic prey.

  18. Assimilation experiments for the Fishery Observing System in the Adriatic Sea

    Science.gov (United States)

    Aydoǧdu, Ali; Pinardi, Nadia; Pistoia, Jenny; Martinelli, Michela; Belardinelli, Andrea; Sparnocchia, Stefania

    2016-10-01

    An impact assessment of a Fishery Observing System (FOS) network in the Adriatic Sea was carried out with an ocean circulation model fully-coupled with a data assimilation system. The FOS data are single point vertical values of temperature collected in 2007. In this study, we used the Observing System Experiment (OSE) and Observing System Simulation Experiment (OSSE) methodologies to estimate the impact of different FOS design and sensors implementation. OSEs were conducted to evaluate real observations and they show that the FOS network improves the analysis significantly, especially during the stratification season. Root mean square (RMS) of temperature errors are reduced by about 44% and 36% in the upper and lower layers respectively. We also demonstrated that a similar impact can be obtained with a reduced number of vessels if the spatial coverage of the data points does not change significantly. In the OSSE, the impact of the implementation of a CTD (conductivity-temperature-depth) sensor in place of the existing temperature sensor was tested with identical twin approaches between January and April 2007. The results imply that the assimilation of salinity does not improve the analysis significantly during the winter and spring seasons.

  19. Foraminiferal species responses to in situ experimentally induced anoxia in the Adriatic Sea

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    D. Langlet

    2013-07-01

    Full Text Available Anoxia was successfully induced in four benthic chambers installed at 24 m depth in the northern Adriatic Sea, for periods varying from 9 days to 10 months. During the 10 months period, species richness significantly decreased. Although no significant change in Shannon diversity and Evenness is observed, the composition of the foraminiferal assemblages changes with time. This change is due to interspecific differences in tolerance with respect to anoxia and free sulphides. Leptohalysis scottii, Textularia agglutinans and Quinqueloculina cf. stelligera all showed a significant decrease with time, strongly suggesting they are sensitive to the anoxia and sulphides. Conversely, Eggerella scabra, Bulimina marginata, Lagenammina atlantica, Hopkinsina pacifica and Bolivina pseudoplicata appear to be resistant to the experimental conditions. Quinqueloculina seminula also appears to be sensitive to anoxia but shows a clear standing stock increase during the first month of the experiment, which we interpret as an opportunistic response to increasing organic matter availability due to the degradation of the dead macrofaunal organisms. It appears that none of the anoxia sensitive species is capable to accumulate intracellular nitrates. Such a capacity could be shown for some tested specimens of the dominant anoxia tolerant species E. scabra and B. marginata. However, tests on the denitrification capacity of these taxa yielded negative results, suggesting that their resistance to long-term anoxia is not due to a capacity to denitrify.

  20. Mesoscale dynamics, structure and predictability of a severe Adriatic bora case

    Energy Technology Data Exchange (ETDEWEB)

    Belusic, D.; Klaic, Z.B. [Andrija Mohorovicic Geophysical Inst., Univ. of Zagreb (Croatia)

    2006-04-15

    The dynamics, structure and temporal evolution of a severe Adriatic bora, which occurred during 14 and 15 November 2004 was inspected. Numerical simulation of the investigated episode was performed by the mesoscale model MM5. The model was validated against radiosonde data and wind data from one automatic meteorological station and three ultrasonic anemometers. Two anemometers where located in the region extremely favorable for the bora occurrence (Senj and Vratnik Pass), while the third one was placed in the mainland (Zagreb-Horvatovac). The model reproduced well the onset and the strength of the investigated bora, as well as the establishment of bora-induced potential vorticity (PV) banners. On the other hand, surface turbulent kinetic energy (TKE) was poorly predicted. Inspection of gap wind characteristics indicated the absence of strong dissipation in the flow through a mountain pass, which gives rise to a horizontally elongated jet. Appearance of wave breaking in the lee of a mountain peak leads to the creation of a mountain wake. Shear lines between individual jets and wakes created in this way are then responsible for the generation of PV banners. Also, the ability of the model to predict hourly wind gusts was validated using a recently developed method. (orig.)

  1. Direct pollution cost assessment of cruising tourism in the Croatian Adriatic

    Directory of Open Access Journals (Sweden)

    Hrvoje Carić

    2010-06-01

    Full Text Available Cruise tourism is one of the fastest growing sectors of the tourism industry and one that has significant environmental, economic and social impacts on target destinations. Yet, tourism decision makers, developers and managers rarely incorporate or estimate environmental impacts in their tourism development planning. Indeed, the analysis of the resulting resource exploitation is rarely undertaken until carrying capacity is breached and attractiveness diminished. In this article an assessment is offered that determines, quantifies and financially estimates emissions and waste streams so they can be compared with the direct income generated to the local economy by cruising tourism. It is applied to the Croatian part of the Adriatic and financially evaluates environmental impacts, arguing that they are negative externalities due to inappropriate internalization and management.The purpose of the assessment is to give a “snapshot” of the situation, and also to create the groundwork for a model that will assist decision makers and stakeholders, at different levels and of different interests, to prevent and reduce the ecological, health and economic risks associated with dead-end tourism development.

  2. A process study of the Adriatic-Ionian System baroclinic dynamics

    Science.gov (United States)

    Reale, M.; Crise, A.; Farneti, R.; Mosetti, R.

    2016-08-01

    The driving mechanisms behind the decadal reversal of the Ionian Sea upper layer circulation recently sparked a considerable discussion in the Mediterranean scientific community. It has been suggested that the reversal can be driven by variations in wind stress curl over the basin, baroclinic dynamics acting within the Adriatic-Ionian System (AISys) or baroclinic dynamics driven by thermohaline properties at the AISys eastern boundary. Here we perform numerical simulations in order to assess the relative importance of remote forcings (wind stress, thermohaline fluxes, thermohaline open boundary conditions) on the vorticity and energy budget of the Ionian Sea. A mechanistic understanding of the AISys dynamics is achieved with an approach based on an increasing complexity in the model forcings and domain. Our experiments suggest that wind stress does not play a leading role in the vorticity and energy budgets of the Ionian Sea. Wind stress can reinforce or weaken the circulation but it is not able to reverse its sign. Its role becomes dominant only in the absence of inflows through the Antikythira Strait and Cretan Passage. Instead, reversals in the upper layer circulation of the Ionian Sea take place only in the presence of an active boundary on the Aegean Sea/Levantine Basin side and appear to be correlated with substantial exchanges of Availalble Potential Energy between the two basins (as observed at the end of the Eastern Mediterranean Transient). From an energetic point of view, AISys can be explained therefore only if the role of the Aegean Sea is explicitly considered.

  3. Development and validation of an extensive growth and growth boundary model for psychrotolerant Lactobacillus spp. in seafood and meat products.

    Science.gov (United States)

    Mejlholm, Ole; Dalgaard, Paw

    2013-10-15

    A new and extensive growth and growth boundary model for psychrotolerant Lactobacillus spp. was developed and validated for processed and unprocessed products of seafood and meat. The new model was developed by refitting and expanding an existing cardinal parameter model for growth and the growth boundary of lactic acid bacteria (LAB) in processed seafood (O. Mejlholm and P. Dalgaard, J. Food Prot. 70. 2485-2497, 2007). Initially, to estimate values for the maximum specific growth rate at the reference temperature of 25 °C (μref) and the theoretical minimum temperature that prevents growth of psychrotolerant LAB (T(min)), the existing LAB model was refitted to data from experiments with seafood and meat products reported not to include nitrite or any of the four organic acids evaluated in the present study. Next, dimensionless terms modelling the antimicrobial effect of nitrite, and acetic, benzoic, citric and sorbic acids on growth of Lactobacillus sakei were added to the refitted model, together with minimum inhibitory concentrations determined for the five environmental parameters. The new model including the effect of 12 environmental parameters, as well as their interactive effects, was successfully validated using 229 growth rates (μ(max) values) for psychrotolerant Lactobacillus spp. in seafood and meat products. Average bias and accuracy factor values of 1.08 and 1.27, respectively, were obtained when observed and predicted μ(max) values of psychrotolerant Lactobacillus spp. were compared. Thus, on average μ(max) values were only overestimated by 8%. The performance of the new model was equally good for seafood and meat products, and the importance of including the effect of acetic, benzoic, citric and sorbic acids and to a lesser extent nitrite in order to accurately predict growth of psychrotolerant Lactobacillus spp. was clearly demonstrated. The new model can be used to predict growth of psychrotolerant Lactobacillus spp. in seafood and meat

  4. Occurrence of the tdh and trh genes in Vibrio parahaemolyticus isolates from waters and raw shellfish collected in two French coastal areas and from seafood imported into France.

    Science.gov (United States)

    Robert-Pillot, Annick; Guénolé, Alain; Lesne, Jean; Delesmont, Régis; Fournier, Jean-Michel; Quilici, Marie-Laure

    2004-03-15

    The occurrence of the hemolysin genes, tdh and trh, in Vibrio parahaemolyticus strains isolated from environmental samples collected in two French coastal areas, clinical samples, and seafood products imported into France was studied. Polymerase chain reaction (PCR) with two sets of primers was used to detect the hemolysin genes. Most of the clinical isolates (91%) and 1.5% of the isolates from seafood possessed the hemolysin genes. Three and fifteen percent, respectively, of the two groups of environmental strains carried the hemolysin genes depending on the geographic site. The tdh and trh genes play important roles in virulence. Thus, our results indicate that pathogenic V. parahaemolyticus isolates are present in French coastal areas and in seafood imported into France. Furthermore, they may also be present in French seafood products.

  5. Contamination status and spatial distribution of organochlorine compounds in fishes from Nansei Islands, Japan.

    Science.gov (United States)

    Malarvannan, Govindan; Takahashi, Shin; Ikemoto, Tokutaka; Isobe, Tomohiko; Kunisue, Tatsuya; Sudaryanto, Agus; Miyagi, Toshihiko; Nakamura, Masaru; Yasumura, Shigeki; Tanabe, Shinsuke

    2011-01-01

    Two species of fishes (n=52; tilapia and mullet) from industrialized and urbanized areas of Okinawa Island (Manko-Noha river, Hija river and Shikaza river) and from a remote area of Ishigaki Island (Anparu mudflat), Japan were collected between August 2005 and July 2006, and analyzed for five organochlorine compounds (OCs), viz., DDTs, PCBs, CHLs, HCHs and HCB. Concentrations and the contamination patterns of OCs in fishes varied between locations. Considerable residue levels of OCs, especially CHLs and DDTs were found in both fishes from the main Okinawa Island. These levels were relatively higher than the reported values for seafood from Japanese coasts, indicating that even now pollution sources of these contaminants still exist in this region. On the other hand, lower concentrations of OCs were detected in fishes from Ishigaki Island waters than those of other Japanese coastal waters, suggesting that this region is less contaminated by OC contaminants.

  6. (Contaminated soil)

    Energy Technology Data Exchange (ETDEWEB)

    Siegrist, R.L.

    1991-01-08

    The traveler attended the Third International Conference on Contaminated Soil, held in Karlsruhe, Germany. The Conference was a status conference for worldwide research and practice in contaminated soil assessment and environmental restoration, with more than 1500 attendees representing over 26 countries. The traveler made an oral presentation and presented a poster. At the Federal Institute for Water, Soil and Air Hygiene, the traveler met with Dr. Z. Filip, Director and Professor, and Dr. R. Smed-Hildmann, Research Scientist. Detailed discussions were held regarding the results and conclusions of a collaborative experiment concerning humic substance formation in waste-amended soils.

  7. Impact of irradiation on fish and seafood shelf life: a comprehensive review of applications and irradiation detection.

    Science.gov (United States)

    Arvanitoyannis, Ioannis S; Stratakos, Alexandros; Mente, Elena

    2009-01-01

    Irradiation is one of the most important and effective methods towards food preservation despite the consumer lack of trust and aversion towards this method. Irradiation effectiveness greatly depends on the dose provided to food. This review aims at summarizing all available information regarding the impact of irradiation dose on the shelf life and microflora and sensory and physical properties of fish, shellfish, molluscs, and crustaceans. The synergistic effect of irradiation in conjunction with other techniques such as salting, smoking, freezing, and vacuum packaging was also reported. Another issue covered within the frame of this review is the detection (comparison of methods in terms of their effectiveness and validity) of irradiated fish and seafood. The information related to fish and seafood irradiation and its detection is presented by means of 11 comprehensive tables and 9 figures.

  8. Development and validation of an extensive growth and growth boundary model for psychrotolerant Lactobacillus spp. in seafood and meat products

    DEFF Research Database (Denmark)

    Mejlholm, Ole; Dalgaard, Paw

    2013-01-01

    boundary of lactic acid bacteria (LAB) in processed seafood (O. Mejlholm and P. Dalgaard, J. Food Prot. 70. 2485–2497, 2007). Initially, to estimate values for the maximum specific growth rate at the reference temperature of 25°C (μref) and the theoretical minimum temperature that prevents growth......, citric and sorbic acids on growth of Lactobacillus sakei were added to the refitted model, together with minimum inhibitory concentrations determined for the five environmental parameters. The new model including the effect of 12 environmental parameters, as well as their interactive effects......A new and extensive growth and growth boundary model for psychrotolerant Lactobacillus spp. was developed and validated for processed and unprocessed products of seafood and meat. The new model was developed by refitting and expanding an existing cardinal parameter model for growth and the growth...

  9. Novel method to reduce fishy aftertaste in wine and seafood pairing using alcohol-treated yeast cells.

    Science.gov (United States)

    Tsuji, Toshikazu; Kanai, Keiko; Yokoyama, Aki; Tamura, Takayuki; Hanamure, Kenichi; Sasaki, Kanako; Takata, Ryoji; Yoshida, Satoshi

    2012-06-20

    "Fishy aftertaste" is sometimes perceived in wine consumed with seafood. Iron in wine has been reported to be a key compound that produces fishy aftertaste. However, cost-effective methods to remove iron from wine have not been developed. Here, we describe a cost-effective and safe iron adsorbent consisting of alcohol-treated yeast (ATY) cells based on the observation that nonviable cells adsorbed iron after completion of fermentation. Treatment of cells with more than 40% (v/v) ethanol killed them without compromising their ability to adsorb iron. Drying the ATY cells did not reduce iron adsorption. Use of ATY cells together with phytic acid had a synergistic effect on iron removal. We term this means of removing iron the "ATY-PA" method. Sensory analysis indicated that fishy aftertaste in wine-seafood pairings was not perceived if the wine had been pretreated with both ATY cells and phytic acid.

  10. Characterization of anti-listeria bacteriocins isolated from shellfish: Potential antimicrobials to control non-fermented seafood

    OpenAIRE

    Pinto, Ana Luísa; Fernandes, Melissa; Pinto, Cristina; Albano, Helena; Castilho, Fernanda; Teixeira, Paula; Gibbs, Paul A

    2009-01-01

    This work had as main objectives to characterize two bacteriocins produced by lactic acid bacteria (LAB) previously isolated from non-fermented seafood, in order to evaluate their potential as new food protective agents. The two bacteriocinogenic isolates were identified by Polymerase Chain Reaction (PCR) using genusand species-specific primers, and confirmed by 16S rDNA sequencing, as Enterococcus faecium and Pediococcus pentosaceus. The antimicrobial spectrum of each strain incl...

  11. Evaluation of Chemical Analysis Method and Determination of Polycyclic Aromatic Hydrocarbons Content from Seafood and Dairy Products

    OpenAIRE

    Lee, So-Young; Lee, Jee-Yeon; Shin, Han-Seung

    2015-01-01

    This study was carried out to investigate contents of 8 polycyclic aromatic hydrocarbons (PAHs) from frequently consumed seafood and dairy products and to evaluate their chemical analysis methods. Samples were collected from markets of 9 cities in Korea chosen as the population reference and evaluated. The methodology involved saponification, extraction with n-hexane, clean-up on Sep-Pak silica cartridges and gas chromatograph-mass spectrometry analysis. Validation proceeded on 2 matrices. Re...

  12. The sensory quality of meat, game, poultry, seafood and meat products as affected by intense light pulses: a systematic review

    OpenAIRE

    2015-01-01

    The effect of intense light pulses (ILP) on sensory quality of 16 different varieties of meat, meat products, game, poultry and seafood are reviewed. Changes induced by ILP are animal species, type of meat product and fluences applied dependent. ILP significantly deteriorates sensory quality of cooked meat products. It causes less change in the sensory properties of dry cured than cooked meat products while fermented sausage is least affected. The higher fluence applied significantly changes ...

  13. Comparison of SeaWiFS and MODIS time series of inherent optical properties for the Adriatic Sea

    Directory of Open Access Journals (Sweden)

    F. Mélin

    2011-05-01

    Full Text Available Time series of inherent optical properties (IOPs derived from SeaWiFS and MODIS are compared for the Adriatic Sea. The IOPs are outputs of the Quasi-Analytical Algorithm and include total absorption a, phytoplankton absorption aph, absorption associated with colored detrital material (CDM acdm, and particle backscattering coefficient bbp. The average root-mean square difference Δ computed for log-transformed distributions decreases for $a$ from 0.084 at 412 nm to 0.052 at 490 nm, is higher for aph(443 (0.149 than for acdm(443 (0.071, and is approximately 0.165 for bbp at various wavelengths. The SeaWiFS a at 443 and 490 nm, aph at 443 nm and bbp are on average higher than the MODIS counterparts. Statistics show significant variations in space and time. There is an overall increasing gradient for Δ associated with the absorption terms from the open southern and central Adriatic to the northwest part of the basin, and a reversed gradient for the particulate backscattering coefficient. For time series analysis, only a(412 and acdm(443 currently present an unbiased continuity bridging the SeaWiFS and MODIS periods for the Adriatic Sea.

  14. Spatial variations of scavenging rates within the central and northern Adriatic Sea: Use of U-Th disequilibria

    Energy Technology Data Exchange (ETDEWEB)

    Hamilton, T. [Lawrence Livermore National Lab., CA (United States); Heilmann, J. [Danish Inst. for Fisheries and Marine Research, Charlottenlund (Denmark); Fowler, S.; Miquel, J.C. [IAEA Marine Environment Lab., Monaco (Monaco)

    1996-04-01

    Dissolved and particulate concentrations of {sup 234}Th, {sup 210}Pb and {sup 210}Po were measured in surface waters of the central and northern Adriatic Sea. The half-lives and biogeochemistry of {sup 234}Th (t{sub 1/2} = 24.1 days), {sup 210}Po (t{sub 1/2} = 138.4 days) and {sup 210}Pb (t{sub 1/2} = 22.3 years) are ideal for studying particle dynamics in the upper water column. It has been observed that the residence time of dissolved {sup 234}Th with respect to removal on biogenic particles is inversely proportional to primary productivity and may be used to predict export from or new production in the euphotic zone. Model-derived {sup 234}Th fluxes can also be used to help validate sediment trap collections in the upper water column. The aim of the present study was to gain an insight into the intensity and variability of active scavenging and particle removal processes in the central and northern Adriatic Sea. This semi-enclosed sea is strongly influenced by fresh water runoff from rivers carrying large quantities of dissolved nutrients and suspended particles. These inputs of nutrients and suspended particles are expected to give rise to large biological and biogeochemical gradients across the Continental Shelf and offer a range of environments for studying particle scavenging and removal processes. The authors have examined the relationships between {sup 234}Th scavenging rates and residence times of dissolved and particulate phases as a function of other physical and biological parameters (primary productivity, POC, chlorophyll, C/N and total suspended matter). Particular reference is made to the two contrasting environments of the Adriatic--a eutrophic zone near the Po River outflow and in the largely oligotrophic waters of the Jabuka Pit.

  15. Assessing the main threats to marine ecosystem components of the Adriatic - Ionian Region for the implementation of Maritime Spatial Planning

    Science.gov (United States)

    Lipizer, Marina

    2015-04-01

    Marine and coastal ecosystems and the related benefits they provide for humans are threatened by increasing pressures and competing usages. To address these issues, in the last decade, several EU legislations have been formulated to guarantee and promote sustainable use of the sea (e.g. Common Fishery Policy, Marine Strategy Framework Directive, Maritime Spatial Planning). As a first step to implement cross-border Maritime Spatial Planning (MSP) in the Adriatic - Ionian Seas, a review of the main anthropogenic pressures due to maritime activities involving the Adriatic - Ionian Region (AIR) as well as of the most relevant environmental components has been carried out. The main objective of the analysis is to better identify the spatial distribution of human uses of the sea and of the key environmental components and the ecosystem services provided. The analysis of the existing conditions includes a description of the human activities per economic sector, considering type, location, dimension and magnitude of the activity in the AIR and the spatial extent of the main environmental and ecological values present in the AIR. The environmental status has been characterized according to the descriptors proposed by the Marine Strategy Framework Directive (MSFD Directive 2008/56/EC) and the most sensitive ecosystem components in the AIR have been pointed out. A qualitative analysis of the relationships between good environmental status descriptors sensu MSFD and ecosystem services in the AIR has been carried out to provide useful information for the implementation of MSP. Cross-border Maritime Spatial Planning is particularly needed in a semi-enclosed basin such as the Adriatic Sea, hosting very diverse human activities, ranging from fishery to tourism, sand extraction, commercial and passenger transport, oil and gas exploration and exploitation, which may partially overlap and severely threaten ecosystem functioning and the associated services.

  16. Concentrations of PCDD/PCDFs and PCBs in fish and seafood from the Catalan (Spain) market: estimated human intake.

    Science.gov (United States)

    Bocio, Ana; Domingo, José L; Falcó, Gemma; Llobet, Juan M

    2007-02-01

    The concentrations of polychlorinated dibenzo-p-dioxins (PCDDs), dibenzofurans (PCDFs) and biphenyls (PCBs) in samples from 14 fish and seafood species widely consumed by the population of Catalonia, Spain, were measured. These samples were randomly purchased independently of their geographical origin. The intake of PCDD/Fs and PCBs through consumption of these species was also estimated for various age and sex groups of this population. The highest and lowest levels of PCDD/Fs and dioxin-like PCBs (DL-PCBs) were found in red mullet and shrimp, respectively. For a standard adult man (70 kg body weight), the intake of PCDD/Fs plus DL-PCBs through consumption of fish and other seafood was estimated to be 38.0 pg WHO-TEQ/day. Tuna, hake, and sardine were the species with the highest contribution to this intake. The results of this study indicate that, in general terms, the dietary habits of the population of Catalonia (Spain) regarding fish and seafood consumption do not contribute remarkably to increase PCDD/F and DL-PCB intake.

  17. Seafood-like flavour obtained from the enzymatic hydrolysis of the protein by-products of seaweed (Gracilaria sp.).

    Science.gov (United States)

    Laohakunjit, Natta; Selamassakul, Orrapun; Kerdchoechuen, Orapin

    2014-09-01

    An enzymatic bromelain seaweed protein hydrolysate (eb-SWPH) was characterised as the precursor for thermally processed seafood flavour. Seaweed (Gracilaria fisheri) protein after agar extraction was hydrolysed using bromelain (enzyme activity=119,325 U/g) at 0-20% (w/w) for 0.5-24 h. Optimal hydrolysis conditions were determined using response surface methodology. The proposed model took into account the interaction effect of the enzyme concentration and hydrolysis time on the physicochemical properties and volatile components of eb-SWPH. The optimal hydrolysis conditions for the production of eb-SWPH were 10% bromelain for 3h, which resulted in a 38.15% yield and a 62.91% degree of hydrolysis value. Three free amino acids, arginine, lysine, and leucine, were abundant in the best hydrolysate. Ten volatile flavours of the best eb-SWPH were identified using gas chromatography/mass spectrometry. The predominant odourants were hexanal, hexanoic acid, nonanoic acid, and dihydroactinidiolide. The thermally processed seafood flavour produced from eb-SWPH exhibited a roasted seafood-like flavouring.

  18. By-Catch Impacts in Fisheries: Utilizing the IUCN Red List Categories for Enhanced Product Level Assessment in Seafood LCAs

    Science.gov (United States)

    Hornborg, Sara; Svensson, Mikael; Nilsson, Per; Ziegler, Friederike

    2013-11-01

    Overexploitation of fish stocks causes concern not only to fisheries managers and conservation biologists, but also engages seafood consumers; more integrated product perspectives would be useful. This could be provided by life cycle assessment (LCA); however, further complements of present LCA methodology are needed to assess seafood production, one being by-catch impacts. We studied the scientific rationale behind using the IUCN Red List of Threatened Species™ for assessment of impacts relating to fish species’ vulnerability. For this purpose, the current Red List status of marine fish in Sweden was compared to the advice given in fisheries as well as key life history traits known to indicate sensitivity to high fishing pressure. Further, we quantified the amount of threatened fish (vulnerable, endangered, or critically endangered) that was discarded in demersal trawl fisheries on the Swedish west coast. The results showed that not only did the national Red List of marine fish have a high consistency with advice given in fisheries and indices of vulnerability, the different fishing practices studied were also found to have vastly different amounts of threatened fish discarded per kilo landing. The suggested approach is therefore promising as a carrier of aggregated information on the extent to which seafood production interferes with conservation priorities, in particular for species lacking adequate stock assessment. To enable extensive product comparisons, it is important to increase coverage of fish species by the global IUCN Red List, and to reconsider the appropriate assessment unit (species or stocks) in order to avoid false alarms.

  19. By-catch impacts in fisheries: utilizing the IUCN red list categories for enhanced product level assessment in seafood LCAs.

    Science.gov (United States)

    Hornborg, Sara; Svensson, Mikael; Nilsson, Per; Ziegler, Friederike

    2013-11-01

    Overexploitation of fish stocks causes concern not only to fisheries managers and conservation biologists, but also engages seafood consumers; more integrated product perspectives would be useful. This could be provided by life cycle assessment (LCA); however, further complements of present LCA methodology are needed to assess seafood production, one being by-catch impacts. We studied the scientific rationale behind using the IUCN Red List of Threatened Species™ for assessment of impacts relating to fish species' vulnerability. For this purpose, the current Red List status of marine fish in Sweden was compared to the advice given in fisheries as well as key life history traits known to indicate sensitivity to high fishing pressure. Further, we quantified the amount of threatened fish (vulnerable, endangered, or critically endangered) that was discarded in demersal trawl fisheries on the Swedish west coast. The results showed that not only did the national Red List of marine fish have a high consistency with advice given in fisheries and indices of vulnerability, the different fishing practices studied were also found to have vastly different amounts of threatened fish discarded per kilo landing. The suggested approach is therefore promising as a carrier of aggregated information on the extent to which seafood production interferes with conservation priorities, in particular for species lacking adequate stock assessment. To enable extensive product comparisons, it is important to increase coverage of fish species by the global IUCN Red List, and to reconsider the appropriate assessment unit (species or stocks) in order to avoid false alarms.

  20. Prevention and control technology progress of Vibrio parahaemolyticus in seafood%海产品中副溶血性弧菌防控技术研究进展

    Institute of Scientific and Technical Information of China (English)

    胡连花; 王雅玲; 刘阳; 孙力军

    2011-01-01

    Because Vibrio parahaemolyticus was recognized as a major food borne pathogen that caused food poisoning in coastal provinces, effective measures must be taken to prevent and control its contamination in seafood. Recent years, with the deep research of prevention and control technology, lots of experiences were summed up and many new ways had been developed. The existing control measures such as supervision,purification,and physical, ohemical, biological control were systematically discussesed in this review, in order to provide reference information for the application and development of these techniques, and the guarantee for seafood quality and security.%副溶血性弧菌是沿海省份引起食物中毒的一种主要的食源性致病菌,因此必须采取有效措施预防控制副溶血性弧菌在海产品中的污染.随着近些年人们对副溶血性弧菌防控技术研究的深入,总结出了大量的经验,开发出了许多新方法.本文主要从监管、净化、物理、化学及生物控制等方面对现有的副溶血性弧菌防控技术进行系统阐述,旨在为这些方法的应用和发展提供参考,进而为海产品的质量安全控制提供有利保障.

  1. Morphological change by overwash on a microtidal backshore: Bevano beach, Northern Adriatic Sea

    Science.gov (United States)

    Sedrati, M.; Ciavola, P.; Armaroli, C.; Fontana, E.; Masina, M.

    2009-04-01

    The Bevano beach is a small microtidal shore facing the Adriatic Sea located south of Ravenna, in the Emilia-Romagna region, northern Italy. This beach corresponds to the old Bevano river spit which was abandoned after the relocation of the river mouth some 500 m to the south of the previous inlet position. The old river mouth was cut off from the Adriatic by massive sand dumping and the sediments on the newly created beach were fixed by aeolian fences and vegetation. This 600 m long featureless beach looks like a sand barrier: it is backed by the abandoned channel of the Bevano River and is one of the lowest dune system of the region (around 1 m height), causing the beach to still being vulnerable to coastal flooding, storm surges and overwash. This study presents the morphological changes of the "microtidal barrier" in response to one of the highest surges recorded in the last 100 years. Two topographic surveys of the Bevano beach were conducted before and a few hours after the exceptional high tide level recorded on 01 December 2008 (high tide level of 1.59 m above MSL and surge of 0.97 m, combined with an offshore significant wave height of 1.45 m). The lack of height and sand volume of the lower dune crest of the Bevano beach caused the entire barrier to be inundated during the high tide, resulting in important overwash processes. The inundation event was preceded by increasing water levels that were recorded in the old river channel which is the landward limit of the Bevano barrier. Seven separate washover fans were distinguished together with severe damages to fences and dune vegetation. The washover fans had different dimensions, the most important one being around 18 m wide, and generating a ~ 9 m landward migration of the back-barrier limit. The cross-shore profile response to the overwash event can be categorized into two types (1) barrier disintegration and (2) barrier rollover relative to the dune crest height. Furthermore, the study area was subjected

  2. VHR Reconstruction of a Portion of Late Holocene Transgressive Adriatic System Tract

    Science.gov (United States)

    Moscon, Giorgia; Correggiari, Annamaria; Remia, Alessandro; Stefani, Cristina; Fontana, Alessandro

    2014-05-01

    The Adriatic Sea is an epicontinental semi-enclosed basin characterized by a very low axial gradient shelf in the northern and central part and by a steeper gradient in the southern sector. During the last sea-level cycle in the Adriatic basin were deposited 1) low-stand deposits formed during the Last Glacial Maximum (LGM), 2) transgressive deposits formed during the last relative sea-level rise and 3) high-stand deposits confined in a narrow belt parallel to the modern shore-line. Across the low-gradient northern shelf, the stepwise, high-amplitude last relative sea-level rise favoured the deposition and in-place drowning of different generations of transgressive barrier-lagoon systems. Where present, the paralic transgressive deposits rest on a transgressive surface and are topped by a wave ravinement surface (Cattaneo and Steel, 2003). The transgressive deposits located south of the Po delta, offshore Ravenna show a dominant longshore trend similar to the modern sea-level high-stand deposits. These bodies are wreak of ancient coastal wedges drowned in place and consist in well sorted sand capped by ravinement surface and frequently drapped by a thin veneer of high-stand mud. In recent years, the study of the transgressive deposits has focused on the quality and the amount of sand for beaches nourishment. A stratigraphic characterization of one transgressive deposit at 33 m depth was carried out in order to understand its evolution before and during the last sea-level rise and define its sand content. 765 Km of very high resolution seismic profiles were acquired at 33 w.d. during NAD12 oceanographic cruise to increase the knowledge in a known shelf area. In each profiles the transgressive surface (ts) has been traced correlating the dated peat layers from published data and it has been digitized through SeisPrho which is an interactive software for processing and interpreting high-resolution seismic reflection profiles. Data processing defined a transgressive

  3. Quality control of climatological time series in the province of macerata (adriatic side of central italy)

    Science.gov (United States)

    Gentilucci, Matteo; Bisci, Carlo; Fazzini, Massimiliano; Tognetti, Danilo

    2016-04-01

    The analysis is focused on more than 100 meteorological recording stations located in the Province of Macerata (Marche region, Adriatic side of Central Italy) and in its neighbours; it aims to check the time series of their climatological data (temperatures and precipitations), covering about one century of observations, in order to remove or rectify any errors. This small area (about 2.800Km2) features many different climate types, because of its varied topography ranging, moving westward, from the Adriatic coast to the Appennines (over 2.100m of altitude). In this irregular context, it is difficult to establish a common procedure for each sector; therefore, it has been followed the general guidelines of the WMO, with some important difference (mostly in the method). Data are classified on the basis of validation codes (VC): missing datum (VC=-1), correct or verified datum (VC=0), datum under investigation (VC=1), datum removed after the analysis (VC=2), datum reconstructed through interpolation or by estimating the errors of digitization (VC=3). The first step was the "Logical Control", consisting in the investigation of gross errors of digitization: the data found in this phase of the analysis has been removed without any other control (VC=2). The second step, represented by the "Internal Consistency Check", leads to the elimination (VC=2) of all the data out of range, estimated on the basis of the climate zone for each investigated variable. The third one is the "Tolerance Test", carried out comparing each datum with the historical record it belongs to, in order to apply this test, the normal distribution of data has been evaluated. The "Tolerance Test" usually defines only suspect data (VC=1) to be verified with further tests, such as the "Temporal Consistency" and the "Spatial Consistency". The "Temporal Consistency" allows an evaluation of the time sequence of data, setting a specified range for each station basing upon its historical records. Data out of

  4. Morphodynamics video monitoring and modelling of storm events at Jesolo, Northern Adriatic Sea

    Science.gov (United States)

    Archetti, Renata; Bonaldo, Davide; Carniel, Sandro; Parlagreco, Luca

    2014-05-01

    Near-shore zone morphodynamic assessment is crucial for beach management and hinterland protection against flooding. To this aim, high resolution coastal models are a useful tool, as they allow to couple waves, currents and sediment transport processes for simulating short term morphodynamics and coastal flooding due to extreme storm events. Calibration and validation of high resolution modelling needs coastal in-situ observations. The collection of data representative of the state of the coastal environment, essential for proper set up and calibration of the numerical models, is nonetheless a challenging and expensive task. In the framework of the Italian Flagship Project RITMARE—the Italian Research for the Sea, Subproject 3 (Coastal Waters), Workpackage 4 (Coastal Oceanographic Modeling), the North Adriatic littoral zone has been identified as one Strategic Test Area for the study of coastal dynamics and for the collection of a time series of integrated of integrated measurements to support comprehensive, detailed insight on coastal circulation, wave dynamics, sediment transport and coastal erosion. More specifically, this activity proposes and validates a system for the monitoring and modelling of hydrodynamics and morphodynamics at the beach of Jesolo, about 30 km NE Venice. The system combines a video installation and a 2DH numerical model to simultaneously provide shoreline changes and maps of nearshore waves and currents and sediment transport. In this way the system can cope with issues such as beach flooding, shoreline evolution and morphodynamic nearshore changes. The proposed poster will present first results of wave - currents - sediment simulations with the software Mike21, during selected storm events, and validation of results with in situ observation (shoreline, bar position) collected by the new video monitoring station.

  5. High-frequency atmospherically-induced oscillations in the middle Adriatic coastal area

    Directory of Open Access Journals (Sweden)

    I. Vilibić

    2006-11-01

    Full Text Available Temporal and spatial characteristics of the resonant coupling between travelling air pressure disturbances and the middle Adriatic coastal waters are examined using a barotropic numerical model for a one year period (July 2000–July 2001. The model is forced by the travelling air pressure disturbances reconstructed from the 2-min resolution air pressure series measured at Split. Six experiments for the studied period are performed, in order to analyse the influence of the speed and disturbance direction on the resonant coupling. The first group of three experiments uses variable disturbance direction, whereas in the second three, a constant direction is employed during the whole experiment. Disturbance direction for the first group of experiments is computed from the 500-mb geopotential data provided by European Center for Medium Range Weather Forecast (ECMWF, as it is found that all of the past extreme events are correlated with them. Each experiment, with variable and constant disturbance direction, is repeated with three different constant values of 10, 20 and 30 m/s for the disturbance speed. The model verification on the Split sea level data reveals that the model reproduces most of the events but also overestimates/underestimates some of them and creates some false events due to the rigid assumption of a constant disturbance speed. The best agreement with data is obtained in the model runs assuming a disturbance speed of 20 m/s. A number of trapped and edge waves have been modelled at the constrictions and along the coast, in particular on a shoal that lies off Split perpendicular to the channel axis. The importance of the disturbance direction to the energy content is highlighted, particularly close to the shore, where the difference may be significant at 2–3 times on average, up to 30 cm in maximum amplitude.

  6. Structural and functional responses of harpacticoid copepods to anoxia in the Northern Adriatic: an experimental approach

    Science.gov (United States)

    De Troch, M.; Roelofs, M.; Riedel, B.; Grego, M.

    2013-06-01

    Combined in situ and laboratory studies were conducted to document the effects of anoxia on the structure and functioning of meiobenthic communities, with special focus on harpacticoid copepods. In a first step, anoxia was created artificially by means of an underwater chamber at 24 m depth in the Northern Adriatic, Gulf of Trieste (Mediterranean). Nematodes were found as the most abundant taxon, followed by harpacticoid copepods. While nematode densities were not affected by treatment (anoxia/normoxia) or sediment depth, these factors had a significant impact on copepod abundances. Harpacticoid copepod family diversity, in contrast, was not affected by anoxic conditions, only by depth. Ectinosomatidae and Cletodidae were most abundant in both normoxic and anoxic samples. The functional response of harpacticoid copepods to anoxia was studied in a laboratory tracer experiment by adding 13C pre-labelled diatoms to sediment cores in order to test (1) if there is a difference in food uptake by copepods under normoxic and anoxic conditions and (2) whether initial (normoxia) feeding of harpacticoid copepods on diatoms results in a better survival of copepods in subsequent anoxic conditions. Independent of the addition of diatoms, there was a higher survival rate in normoxia than anoxia. The supply of additional food did not result in a higher survival rate of copepods in anoxia, which might be explained by the presence of a nutritionally better food source and/or a lack of starvation before adding the diatoms. However, there was a reduced grazing pressure by copepods on diatoms in anoxic conditions. This resulted in a modified fatty acid composition of the sediment. We concluded that anoxia not only impacts the survival of consumers (direct effect) but also of primary producers (indirect effect), with important implications for the recovery phase.

  7. Structural and functional responses of harpacticoid copepods to anoxia in the Northern Adriatic: an experimental approach

    Directory of Open Access Journals (Sweden)

    M. De Troch

    2013-02-01

    Full Text Available Combined in situ and laboratory studies were conducted to document the effects of anoxia on the structure and functioning of meiobenthic communities, with special focus on harpacticoid copepods. In a first step, anoxia was created artificially by means of an underwater chamber at 24 m depth in the Northern Adriatic, Gulf of Trieste (Mediterranean. Nematodes were found as most abundant taxon, followed by harpacticoid copepods. While nematode densities were not affected by treatment (anoxia/normoxia or sediment depth, these factors had a significant impact on copepod abundances. Harpacticoid copepod family diversity, in contrast, was not affected by anoxic conditions, only by depth. Ectinosomatidae and Cletodidae were most abundant in both normoxic and anoxic samples. The functional response of harpacticoid copepods to anoxia was studied in a laboratory tracer experiment by adding 13C pre-labelled diatoms to sediment cores in order to test (1 if there is a difference in food uptake by copepods under normoxic and anoxic conditions and (2 whether initial (normoxia feeding of harpacticoid copepods on diatoms results in a better survival of copepods in subsequent anoxic conditions. Independent of the addition of diatoms, there was a higher survival rate in normoxia than anoxia. The supply of additional food did not result in a higher survival rate of copepods in anoxia, which might be explained by the presence of a nutritionally better food source and/or a lack of starvation before adding the diatoms. However, there was a reduced grazing pressure by copepods on diatoms in anoxic conditions. This resulted in a modified fatty acid composition of the sediment. We concluded that anoxia not only impacts the survival of consumers (direct effect but also of primary producers (indirect effect, with important implications for the recovery phase.

  8. Eutrophication influence on phytoplankton community composition in three bays on the eastern Adriatic coast

    Directory of Open Access Journals (Sweden)

    Mia Bužančić

    2016-10-01

    Full Text Available This study shows the influence of eutrophication pressure on the phytoplankton community structure, abundance and biodiversity in the investigated bays with different hydromorphological features. Šibenik Bay is a highly stratified estuary of the karstic river Krka; Kaštela Bay is a semi-enclosed coastal bay, which is influenced by the relatively small river Jadro; and Mali Ston Bay is located at the Neretva River estuary, the largest river on the eastern part of the Adriatic Sea. All of the areas are affected by urban pressure, which is reflected in the trophic status of the waters. The greatest anthropogenic influence was found in Kaštela Bay while the lowest influence was found in Mali Ston Bay. In this study, the highest biomass concentration and maximum abundance of phytoplankton were recorded at the stations under the strongest anthropogenic influence. Those stations show a dominance of abundance compared to the biomass and a dominance of opportunistic species, which is reflected in the lower biodiversity of phytoplankton community. Diatoms were the most represented group of the phytoplankton community in all three bays, followed by the dinoflagellates. Diatoms that were highlighted as significant for the difference between the bays were Skeletonema marinoi in Šibenik Bay, Leptocylindrus minimus in Kaštela Bay and the genus Chaetoceros spp. in Mali Ston Bay. Dinoflagellates were more abundant at the stations under the strongest anthropogenic influence, and most significant were Prorocentrum triestinum in Kaštela Bay and Gymnodinium spp. in Šibenik Bay and Mali Ston Bay.

  9. Prevalence and antimicrobial susceptibility of Vibrio parahaemolyticus isolated from seafoods in Lagos Lagoon Nigeria

    Directory of Open Access Journals (Sweden)

    Chigozie Oramadike

    2015-12-01

    Full Text Available In this study, a total of 90 seafood samples; croaker fish (Pseudotolithus senegalensis, shrimps (Penaeus notialis and blue crab (Callinectes sapidus collected from landing sites along the Lagos Lagoon in Nigeria were examined for the prevalence of Vibrio parahaemolyticus using both biochemical and molecular methods. Biochemical identification of the isolates was confirmed by Polymerase Chain Reaction (PCR. The presence of the virulence-associated tdh (thermostable direct haemolysin, trh1 (thermostable-related haemolysin and trh2 genes in the V. parahaemolyticus isolates was also detected by the PCR method. PCR products from the V.16S primers were sequenced. Antibiotics susceptibility of the isolates was also determined. About, eight isolates were presumptively identified as V. parahaemolyticus, PCR identified five and none of the isolates were positive for the genes tdh or trh. The five isolates sequenced were identified as different strains of V. parahaemolyticus. V. parahaemolyticus_RIMD_2210633 = 2MKSHa remained resistant to all antimicrobials tested. However, only V. parahaemolyticus_MP-2_AY911391 = TBSHy showed strong sensitivity to all the antimicrobials with ampicillin (minimum inhibitory concentration-4 μg/ml. In addition, the other three isolates showed sensitivity for Tetracycline, Ciprofloxacin, Gentamicin and Ceftazidime. Ampicillin resistance in most of the isolates suggests low efficiency of ampicillin in management of V. parahaemolyticus infection.

  10. The cost of being valuable: predictors of extinction risk in marine invertebrates exploited as luxury seafood.

    Science.gov (United States)

    Purcell, Steven W; Polidoro, Beth A; Hamel, Jean-François; Gamboa, Ruth U; Mercier, Annie

    2014-04-22

    Extinction risk has been linked to biological and anthropogenic variables. Prediction of extinction risk in valuable fauna may not follow mainstream drivers when species are exploited for international markets. We use results from an International Union for Conservation of Nature Red List assessment of extinction risk in all 377 known species of sea cucumber within the order Aspidochirotida, many of which are exploited worldwide as luxury seafood for Asian markets. Extinction risk was primarily driven by high market value, compounded by accessibility and familiarity (well known) in the marketplace. Extinction risk in marine animals often relates closely to body size and small geographical range but our study shows a clear exception. Conservation must not lose sight of common species, especially those of high value. Greater human population density and poorer economies in the geographical ranges of endangered species illustrate that anthropogenic variables can also predict extinction risks in marine animals. Local-level regulatory measures must prevent opportunistic exploitation of high-value species. Trade agreements, for example CITES, may aid conservation but will depend on international technical support to low-income tropical countries. The high proportion of data deficient species also stresses a need for research on the ecology and population demographics of unglamorous invertebrates.

  11. Reconnaissance of 47 antibiotics and associated microbial risks in seafood sold in the United States.

    Science.gov (United States)

    Done, Hansa Y; Halden, Rolf U

    2015-01-23

    Aquaculture production has nearly tripled in the last two decades, bringing with it a significant increase in the use of antibiotics. Using liquid chromatography/tandem mass spectrometry (LC-MS/MS), the presence of 47 antibiotics was investigated in U.S. purchased shrimp, salmon, catfish, trout, tilapia, and swai originating from 11 different countries. All samples (n=27) complied with U.S. FDA regulations and five antibiotics were detected above the limits of detection: oxytetracycline (in wild shrimp, 7.7ng/g of fresh weight; farmed tilapia, 2.7; farmed salmon, 8.6; farmed trout with spinal deformities, 3.9), 4-epioxytetracycline (farmed salmon, 4.1), sulfadimethoxine (farmed shrimp, 0.3), ormetoprim (farmed salmon, 0.5), and virginiamycin (farmed salmon marketed as antibiotic-free, 5.2). A literature review showed that sub-regulatory levels of antibiotics, as found here, can promote resistance development; publications linking aquaculture to this have increased more than 8-fold from 1991 to 2013. Although this study was limited in size and employed sample pooling, it represents the largest reconnaissance of antibiotics in U.S. seafood to date, providing data on previously unmonitored antibiotics and on farmed trout with spinal deformities. Results indicate low levels of antibiotic residues and general compliance with U.S. regulations. The potential for development of microbial drug resistance was identified as a key concern and research priority.

  12. Optimization of Process Parameters for Litopenaeus vannamei Seafood Sauce using Response Surface Methodology

    Directory of Open Access Journals (Sweden)

    Xinyue Li

    2014-02-01

    Full Text Available In this study, in order to determine the optimum formulation of Litopenaeus vannamei seafood sauce, Response Surface Methodology (RSM was employed to investigate the effects of contents of thick broad-bean sauce, sweet soybean paste and Shacha sauce on the sensory quality. Statistical analysis of the results showed that the data were adequately fitted into a second-order polynomial model. The independent parameters of contents of thick broad-bean sauce, sweet soybean paste and the quadratics of contents of thick broad-bean sauce, sweet soybean paste and Shacha sauce significantly affected the sensory evaluation scores. Also the interactions between contents of thick broad-bean sauce and sweet soybean paste, sweet soybean paste and Shacha sauce had a significant effect on the sensory evaluation scores. The optimal conditions for higher sensory evaluation scores were thick broad-bean sauce 6.22%, sweet soybean paste 16.32% and Shacha sauce 10.10%. Under such conditions, the maximum predicted sensory evaluation score was 9.49; the prediction accuracy rate of model was up to 97.10%. These optimum conditions were used to evaluate the trail experiment and the maximum sensory evaluation score was recorded as 9.5±0.36.

  13. Initial Investigation of Using Planar Interdigital Sensors for Assessment of Quality in Seafood

    Directory of Open Access Journals (Sweden)

    A. R. Mohd Syaifudin

    2008-01-01

    Full Text Available A planar interdigital sensor-based sensing system has been fabricated for assessment of seafood quality. Our main objective is to sense the molecule of domoic acid presence in mussels. Three peptide derivatives namely sarcosine, proline, and hydroxylproline were used for the initial studies which are structurally closely related to our target molecule. The proline molecule is arguably the most important amino acid in peptide conformation, containing the basic structural similarity to the domoic acid. Three novel interdigital sensors have been designed and fabricated. The initial result shows that sensors respond very well to the chemicals and it is possible to discriminate the different chemicals from the output of the sensor. Results from the analysis have shown that Sensor_1 has better sensitivity compared to other sensors. Sensor_1 was chosen for further analysis with real mussels. The changes in sensor impedance were then analysed with real mussels before and after adding the proline. The presence of proline on the mussel samples was detected by the sensor. Results also showed a good correlation of 2 = 0.717 between sensitivity and sample thickness.

  14. Duration of pregnancy in relation to seafood intake during early and mid pregnancy: prospective cohort

    DEFF Research Database (Denmark)

    Olsen, S. F; Osterdal, M. L; Salvig, J. D;

    2006-01-01

    We examined the association between exposure to seafood intake during two periods of pregnancy on the one hand and risks of preterm delivery and postterm delivery on the other. In a prospective cohort of 8729 pregnant Danish women, we assessed frequency of fish meals during the first and second.......12-0.95), respectively, in zero fish consumers. All analyses were adjusted for potential confounding by factors such as maternal smoking, height, and prepregnant weight. We conclude that never consuming fish in the first two trimesters of pregnancy was an extremely strong risk factor for preterm delivery but was also...... in the two trimesters, those who never consumed fish (n = 165) had 8.57 (5.46-11.7) days shorter mean gestation and 19.6 (2.32-165) times increased odds of preterm delivery, compared to high fish consumers (n = 127); odds of elective and postterm delivery were reduced by a factor 0.33 (0.11-1.02) and 0.34 (0...

  15. Reconnaissance of 47 Antibiotics and Associated Microbial Risks in Seafood Sold in the United States

    Science.gov (United States)

    Done, Hansa Y.; Halden, Rolf U.

    2014-01-01

    Aquaculture production has nearly tripled in the last two decades, bringing with it a significant increase in the use of antibiotics. Using liquid chromatography/tandem mass spectrometry (LC-MS/MS), the presence of 47 antibiotics was investigated in U.S. purchased shrimp, salmon, catfish, trout, tilapia, and swai originating from 11 different countries. All samples (n= 27) complied with U.S. FDA regulations and five antibiotics were detected above the limits of detection: oxytetracycline (in wild shrimp, 7.7 ng/g of fresh weight; farmed tilapia, 2.7; farmed salmon, 8.6; farmed trout with spinal deformities, 3.9), 4-epioxytetracycline (farmed salmon, 4.1), sulfadimethoxine (farmed shrimp, 0.3), ormetoprim (farmed salmon, 0.5), and virginiamycin (farmed salmon marketed as antibiotic-free, 5.2). A literature review showed that sub-regulatory levels of antibiotics, as found here, can promote resistance development and publications linking aquaculture to this have increased more than 8-fold from 1991–2013. Although this study was limited in size and employed sample pooling, it represents the largest reconnaissance of antibiotics in U.S. seafood to date, providing data on previously unmonitored antibiotics and on farmed trout with spinal deformities. Results indicate low levels of antibiotic residues and general compliance with U.S. regulations. The potential for development of microbial drug resistance was identified as a key concern and research priority. PMID:25449970

  16. Probiotic properties of Pediococcus strains isolated from jeotgals, salted and fermented Korean sea-food.

    Science.gov (United States)

    Lee, Kang Wook; Park, Ji Yeong; Sa, Hyun Deok; Jeong, Ji Hee; Jin, Dong Eun; Heo, Ho Jin; Kim, Jeong Hwan

    2014-08-01

    Three Pediococcus pentosaceus strains were isolated from jeotgals, salted and fermented Korean sea-foods, and their probiotic potentials were examined. After 2 h exposure to pH 3.0, P. pentosaceus F66 survived with the survival ratio of 32.6% followed by P. pentosaceus D56 (17.2%) and P. pentosaceus A24 (7.5%). P. pentosaceus F66 also survived better (26.6%) than P. pentosaceus A24 (13.7%) and P. pentosaceus D56 (5.8%) after 2 h exposure to 0.3% bile salts. Three strains grew slowly on MRS broth with 15% NaCl (w/v), reaching the OD600 values of 0.4-0.8 in 36 h. They adhered to Caco-2 cells (10.9-13.9 CFU/cell) with similar degree of adherence of a positive control, Lactobacillus rhamnosus GG (12.8 ± 0.5 CFU/cell). Three strains possess some desirable enzyme activities such as β-galactosidase, α-glucosidase, β-glucosidase, and N-acetyl-β-glucosidase. From these results, P. pentosaceus F66 seems qualified as a probiotic and can be utilized for fermented foods including jeotgals.

  17. Protease inhibitor from Moringa oleifera with potential for use as therapeutic drug and as seafood preservative.

    Science.gov (United States)

    Bijina, B; Chellappan, Sreeja; Krishna, Jissa G; Basheer, Soorej M; Elyas, K K; Bahkali, Ali H; Chandrasekaran, M

    2011-07-01

    Protease inhibitors are well known to have several applications in medicine and biotechnology. Several plant sources are known to return potential protease inhibitors. In this study plants belonging to different families of Leguminosae, Malvaceae, Rutaceae, Graminae and Moringaceae were screened for the protease inhibitor. Among them Moringa oleifera, belonging to the family Moringaceae, recorded high level of protease inhibitor activity after ammonium sulfate fractionation. M. oleifera, which grows throughout most of the tropics and having several industrial and medicinal uses, was selected as a source of protease inhibitor since so far no reports were made on isolation of the protease inhibitor. Among the different parts of M. oleifera tested, the crude extract isolated from the mature leaves and seeds showed the highest level of inhibition against trypsin. Among the various extraction media evaluated, the crude extract prepared in phosphate buffer showed maximum recovery of the protease inhibitor. The protease inhibitor recorded high inhibitory activity toward the serine proteases thrombin, elastase, chymotrypsin and the cysteine proteases cathepsin B and papain which have more importance in pharmaceutical industry. The protease inhibitor also showed complete inhibition of activities of the commercially available proteases of Bacillus licheniformis and Aspergillus oryzae. However, inhibitory activities toward subtilisin, esperase, pronase E and proteinase K were negligible. Further, it was found that the protease inhibitor could prevent proteolysis in a commercially valuable shrimp Penaeus monodon during storage indicating the scope for its application as a seafood preservative. This is the first report on isolation of a protease inhibitor from M. oleifera.

  18. Picoplankton Community Composition by CARD-FISH and Flow Cytometric Techniques: A Preliminary Study in Central Adriatic Sea Water

    Directory of Open Access Journals (Sweden)

    Anita Manti

    2012-01-01

    Full Text Available Data concerning picoplanktonic community composition and abundance in the Central Adriatic Sea are presented in an effort to improve the knowledge of bacterioplankton and autotrophic picoplankton and their seasonal changes. Flow cytometry analyses revealed the presence of two distinct bacteria populations: HNA and LNA cells. HNA cells showed an explicit correlation with viable and actively respiring cells. The study of viability and activity may increase our knowledge of the part that contributes really to the remineralization and bacterial biomass production. Authotrophic picoplankton abundance, especially picocyanobacteria, was strongly influenced by seasonality, indicating that light availability and water temperature are very important regulating factors. In terms of total carbon biomass, the main contribution came from heterotrophic bacteria with a lower contribution from autotrophic picoplankton. CARD-FISH evidenced, within the Eubacteria domain, the dominance of members of the phyla Alphaproteobacteria, with a strong contribution from SAR11clade, followed by Cytophaga-Flavobacterium and Gammaproteobacteria. The bacterial groups detected contributed differently depending when the sample was taken, suggesting possible seasonal patterns. This study documents for the first time picoplankton community composition in the Central Adriatic Sea using two different approaches, FCM and CARD-FISH, and could provide preliminary data for future studies.

  19. Use of the acoustic Doppler current profiler (ADCP) in the study of the circulation of the Adriatic sea

    Energy Technology Data Exchange (ETDEWEB)

    Ursella, L.; Gacic, M. [Ist. Nazionale di Oceanografia e di Geofisica Sperimentale, Trieste (Italy)

    2001-09-01

    The results of basin-wide vessel-mounted ADCP measurements carried out from May 1995 through February 1996 in the Adriatic Sea are analysed in order to characterise the tidal flow, the steady current field and some specific subbasin scale features. The M2 tide shows the amphidromic point close to the location predicted from theory. The K1 presents an almost constant phase structure that increases in the northern part from east to west during summer. The circulation in the Italian coastal shelf area is highly variable, due to the local wind forcing and pulses of the Po River discharge. The propagation of the signal associated with the latter, can be described in terms of hybrid internal Kelvin waves, revealed also from the upwelling events. It is also shown that the bottom density-driven current draining the bottom layer of the northern Adriatic is, to a large extent, a time-dependent feature with a temporal scale on the order of days. (orig.)

  20. Domoic acid in phytoplankton net samples and shellfish from the Krka River estuary in the Central Adriatic Sea

    Directory of Open Access Journals (Sweden)

    J. ARAPOV

    2014-06-01

    Full Text Available This paper deals with the precise identification of species of Pseudo-nitzschia, focusing on those which are a potential source of domoic acid, from the Krka River estuary of the Central Adriatic Sea. Domoic acid was measured in phytoplankton net samples and shellfish collected in the winter and early spring of 2011 and 2012. Domoic acid was only detected in early March 2011, both in plankton net samples and shellfish extracts, during a Pseudo-nitzschia species bloom. The measured concentrations of particulate domoic acid (DA in filtered concentrated seawater varied from 3.1˗6.2 ng DA ml-1. In shellfish sample DA concentration was 0.2 μg g-1. Species belonging to the Pseudo-nitzschia delicatissima complex were more common than those from the Pseudo-nitzschia seriata complex. Morphological analyses by electron microscopy revealed the presence of three potentially toxic species: P. calliantha, P. pseudodelicatissima and P. pungens, and one non-toxic species: P. subfraudulenta. However, P. calliantha and P. pseudodelicatissima dominated during the March 2011 bloom. This study presents the first evaluation of particulate domoic acid along the Eastern Adriatic Sea and the first record of the presence of P. calliantha, P. pseudodelicatissima, P. pungens and P. subfraudulenta in the Krka River estuary.

  1. Interannual variability of surface heat fluxes in the Adriatic Sea in the period 1998-2001 and comparison with observations

    Energy Technology Data Exchange (ETDEWEB)

    Chiggiato, Jacopo [Servizio Idro Meteorologico, ARPA Emilia Romagna, Viale Silvani 6, I-40122 Bologna (Italy) and Universita degli Studi di Bologna, Dipartimento di Scienze della Terra, Piazza Porta San Donato 1, I-40126 Bologna (Italy)]. E-mail: jchiggiato@smr.arpa.emr.it; Zavatarelli, Marco [Universita di Bologna, Centro Interdipartimentale per la Ricerca sulle Scienze Ambientali, Via S. Alberto 163, I-47100 Ravenna (Italy); Castellari, Sergio [Istituto Nazionale di Geofisica e Vulcanologia, Via Donato Creti 12, I-40128 Bologna (Italy); Deserti, Marco [Servizio Idro Meteorologico, ARPA Emilia Romagna, Viale Silvani 6, I-40122 Bologna (Italy)

    2005-12-15

    Surface heat fluxes of the Adriatic Sea are estimated for the period 1998-2001 through bulk formulae with the goal to assess the uncertainties related to their estimations and to describe their interannual variability. In addition a comparison to observations is conducted. We computed the components of the sea surface heat budget by using two different operational meteorological data sets as inputs: the ECMWF operational analysis and the regional limited area model LAMBO operational forecast. Both results are consistent with previous long-term climatology and short-term analyses present in the literature. In both cases we obtained that the Adriatic Sea loses 26 W/m{sup 2} on average, that is consistent with the assessments found in the literature. Then we conducted a comparison with observations of the radiative components of the heat budget collected on offshore platforms and one coastal station. In the case of shortwave radiation, results show a little overestimation on the annual basis. Values obtained in this case are 172 W/m{sup 2} when using ECMWF data and 169 W/m{sup 2} when using LAMBO data. The use of either Schiano's or Gilman's and Garrett's corrections help to get even closer values. More difficult is to assess the comparison in the case of longwave radiation, with relative errors of an order of 10-20%.

  2. Flocculation, heavy metals (Cu, Pb, Zn) and the sand-mud transition on the Adriatic continental shelf, Italy

    Science.gov (United States)

    George, D.A.; Hill, P.S.; Milligan, T.G.

    2007-01-01

    Across a limited depth range (5-10 m) on many continental shelves, the dominant sediment size changes from sand to mud. This important boundary, called the sand-mud transition (SMT), separates distinct benthic habitats, causes a significant change in acoustic backscatter, represents a key facies change, and delimits more surface-reactive mud from less surface-reactive sand. With the goal of improving dynamical understanding of the SMT, surficial sediments were characterized across two SMTs on the Adriatic continental shelf of Italy. Geometric mean diameter, specific surface area (SSA), mud fraction (<63 ??m) and heavy metal concentrations were all measured. The SMT related to the Tronto River is identified between 15 and 20 m water depth while the SMT associated with the Pescara River varies between 15 and 25 m water depth. The sediment properties correlate with a new, process-based sedimentological parameter that quantifies the fraction of the sediment in the seabed that was delivered as flocs. These correlations suggest that floc dynamics exert strong influence over sediment textural properties and metal concentrations. Relative constancy in the depth of the SMT along this portion of the margin and its lack of evolution over a period during which sediment input to the margin has dramatically decreased suggest that on the Adriatic continental shelf energy is the dominant control on the depth of the SMT. ?? 2006 Elsevier Ltd. All rights reserved.

  3. Use of the Acoustic Doppler Current Profiler (ADCP in the study of the circulation of the Adriatic Sea

    Directory of Open Access Journals (Sweden)

    L. Ursella

    Full Text Available The results of basin-wide vessel-mounted ADCP measurements carried out from May 1995 through February 1996 in the Adriatic Sea are analysed in order to characterise the tidal flow, the steady current field and some specific sub-basin scale features. The M2 tide shows the amphidromic point close to the location predicted from theory. The K1 presents an almost constant phase structure that increases in the northern part from east to west during summer. The circulation in the Italian coastal shelf area is highly variable, due to the local wind forcing and pulses of the Po River discharge. The propagation of the signal associated with the latter, can be described in terms of hybrid internal Kelvin waves, revealed also from the upwelling events. It is also shown that the bottom density-driven current draining the bottom layer of the northern Adriatic is, to a large extent, a time-dependent feature with a temporal scale on the order of days.

    Key words. Oceanography: general (descriptive and regional oceanography; marginal and semi-enclosed seas Oceanography: physical (currents

  4. Searching for a stock structure in Sardina pilchardus from the Adriatic and Ionian seas using a microsatellite DNA-based approach

    DEFF Research Database (Denmark)

    Ruggeri, Paolo; Splendiani, Andrea; Bonanomi, Sara;

    2013-01-01

    In the present study the genetic variability of European sardine from Adriatic and Ionian seas was investigated in order to detect the occurrence of genetic structure within and between these basins. In several samples the analysis of genetic variability at eight microsatellite loci showed a numb...

  5. THE ENVIRONMENTAL IMPACTS OF MARINE FISH CAGE FARMS IN THE EASTERN ADRIATIC

    Directory of Open Access Journals (Sweden)

    Ivan Katavić

    2003-12-01

    Full Text Available Mariculture in Croatia could play a more important role in development of rural communities along coastline. However, by increase of fish farming, public concern over environmental issues has been raised, and the need for more responsible mariculture development and management has been asked. There are opportunities and challenges for effectively integrating mariculture into coastal zone management with equal rights and obligations. This is primarily because of its social and economic mission consisting in preventing de-population of rural coastal areas and islands and meeting the growing needs of tourist market for seafood. Although intensive mariculture production is accused of producing negative environmental effects, many of these effects still need to be scientifically documented. The effect of nitrogen and phosphorous releases from farmed fish faeces or uneaten food is not of significant issues for marine ecosystem, and it is generally of little importance compared to the inflow of nutrients from other coastal sources. The impact on sediment and benthic communities is mainly local and short-term ones, and depends on the number and extent of the farms and their location. Recovery of some benthic communities after the cessation of farming activities may be delayed over several years (i. e. Posidonia beds due to the accumulated organic matter. Bluefin tuna farming if not properly located and managed might cause pollution problems, either from uneaten feed and metabolic waste or from harvesting and processing the fish. In most cases the problem comes from smell pollution during the summer time and the oily water surface that may be widespread much outside of the farm areas. It will be important for sustainable development of Croatian mariculture to offer a healthy and good quality product in the quantities required by the market, while not degrading the marine environment.

  6. Discussion on the Practice of Marketing Strategy of Seafood Culinary Tourism and Standardization of Market Order-Sanya as an Example

    Directory of Open Access Journals (Sweden)

    Qiong Sun

    2014-10-01

    Full Text Available This study makes research on Sanya seafood culinary tourism, aiming to achieve substantial effects in the supervision of Sanya culinary industry, especially the seafood snack bar market and promote the development of market economy in terms of culinary tourism. As an important part of tourism resources, seafood culinary tourism not only has the potential to attract visitors and enhance the attraction of tourism, but may also bring great economic benefits to the local tourism. However, some stalls in Sanya cheat visitors in order to reap fabulous profits. This paper firstly introduces the marketing strategy of Sanya seafood tourism based on the economic analysis method and do researches on the practical path of normative market order from the tourism capacity, demand season, price elasticity of demand, the contradiction of supply and demand balance and the regulation model, then initially put forward the targeted strategies, so as to achieve the well-running sales market and explores how to regulate the order of catering markets, directed at the phenomenon of the cheating of visitors in the seafood snack bars.

  7. Exposure to hexachlorobenzene through fish and seafood consumption in Catalonia, Spain.

    Science.gov (United States)

    Falcó, Gemma; Llobet, Juan M; Bocio, Ana; Domingo, José L

    2008-01-25

    The concentrations of hexachlorobenzene (HCB) were analyzed by HRGC/HRMS in 42 composite samples of the 14 most consumed marine species (sardine, tuna, anchovy, mackerel, swordfish, salmon, hake, red mullet, sole, cuttlefish, squid, clam, mussel, and shrimp) in Catalonia, Spain. The daily intake of HCB associated with this consumption was also estimated for four age groups of the population of Catalonia: children, adolescents, adults and seniors, which were in turn divided according to sex. The highest HCB levels were found in salmon and mackerel: 1.68 and 0.80 ng/g of wet weight, respectively, whereas the lowest HCB levels were found in cuttlefish, mussel, and shrimp (0.02, 0.03, and 0.04 ng/g of wet weight, respectively). In general terms, these results are within the range of data reported in recent years by a number of authors. The highest and lowest HCB intake (ng/day) corresponded to female adults (13.3) and girls (4.0), respectively. For most age/sex groups, salmon and sole were the species showing the highest contribution to HCB intake. When HCB intake was calculated according to the average body weight of the individuals in each group, the highest and lowest values corresponded to boys (0.32 ng/kg/day) and female adolescents (0.14 ng/kg/day). For all groups, HCB intake from fish and seafood consumption was considerably lower than the WHO tolerable daily intake (TDI), for non-cancer effects and for neoplastic effects in humans.

  8. Effect of seafood mediated PCB exposure on desaturase activity and PUFA profile in Faroese septuagenarians.

    Science.gov (United States)

    Tøttenborg, Sandra Søgaard; Choi, Anna L; Bjerve, Kristian S; Weihe, Pal; Grandjean, Philippe

    2015-07-01

    Polychlorinated biphenyl (PCB) exposure may affect serum concentrations of polyunsaturated fatty acids (PUFAs) by inhibiting desaturases ∆5 and ∆6 that drive their synthesis from precursor fatty acids. Such changes in the composition of fatty acids may affect cardiovascular disease risk, which is thought to increase at elevated PCB exposures. This population-based cross-sectional study examined 712 Faroese men and women aged 70-74 years. The serum phospholipid fraction of fasting blood samples was used to determine the PUFA profile, including linoleic acid, dihomo-γ-linolenic acid, arachidonic acid, eicosatrienoic acid, and other relevant fatty acids. Ratios between precursor and metabolite fatty acids were used as proxies for ∆5 and ∆6 desaturase activity. Tertiles of serum-PCB concentrations were used in multiple regression analyses to determine the association between the exposure and desaturase activity. In multiple regression models, PCB exposure was inversely related to the estimated Δ6 desaturase activity resulting in accumulation of precursor fatty acids and decrease in the corresponding product PUFAs. A positive association between PCB and Δ5 desaturation was also found. A relative increase in EA was also observed, though only in the third tertile of PCB exposure. Non-linear relationships between the exposure and the desaturase activity were not found. Consuming fish and seafood may not be translated into beneficial fatty acid profiles if the diet simultaneously causes exposure to PCBs. Although the desaturase estimates were likely influenced by dietary intakes of product PUFAs, the association between PCB exposure and ∆6 desaturase activity is plausible and may affect cardiovascular disease risk.

  9. Coastal ocean forecasting with an unstructured grid model in the southern Adriatic and northern Ionian seas

    Science.gov (United States)

    Federico, Ivan; Pinardi, Nadia; Coppini, Giovanni; Oddo, Paolo; Lecci, Rita; Mossa, Michele

    2017-01-01

    SANIFS (Southern Adriatic Northern Ionian coastal Forecasting System) is a coastal-ocean operational system based on the unstructured grid finite-element three-dimensional hydrodynamic SHYFEM model, providing short-term forecasts. The operational chain is based on a downscaling approach starting from the large-scale system for the entire Mediterranean Basin (MFS, Mediterranean Forecasting System), which provides initial and boundary condition fields to the nested system. The model is configured to provide hydrodynamics and active tracer forecasts both in open ocean and coastal waters of southeastern Italy using a variable horizontal resolution from the open sea (3-4 km) to coastal areas (50-500 m). Given that the coastal fields are driven by a combination of both local (also known as coastal) and deep-ocean forcings propagating along the shelf, the performance of SANIFS was verified both in forecast and simulation mode, first (i) on the large and shelf-coastal scales by comparing with a large-scale survey CTD (conductivity-temperature-depth) in the Gulf of Taranto and then (ii) on the coastal-harbour scale (Mar Grande of Taranto) by comparison with CTD, ADCP (acoustic doppler current profiler) and tide gauge data. Sensitivity tests were performed on initialization conditions (mainly focused on spin-up procedures) and on surface boundary conditions by assessing the reliability of two alternative datasets at different horizontal resolution (12.5 and 6.5 km). The SANIFS forecasts at a lead time of 1 day were compared with the MFS forecasts, highlighting that SANIFS is able to retain the large-scale dynamics of MFS. The large-scale dynamics of MFS are correctly propagated to the shelf-coastal scale, improving the forecast accuracy (+17 % for temperature and +6 % for salinity compared to MFS). Moreover, the added value of SANIFS was assessed on the coastal-harbour scale, which is not covered by the coarse resolution of MFS, where the fields forecasted by SANIFS

  10. Composition and qualitative characteristics of virgin olive oils produced in northern Adriatic region, Republic of Croatia

    Directory of Open Access Journals (Sweden)

    Milin, Cedomila

    2001-12-01

    Full Text Available Istria and Island Krk are located in the Northern Adriatic region, Republic of Croatia. The majority of oils produced on the islands of this Region correspond to extra virgin classification as a consequence of olive cultivars (Debela, Naska, Rosulja, Slatka, Buza, Carbonera, Bianchera, Leccino. The characterisation of these oils is little known. The objective of this work was the characterisation of virgin olive oils during the 1997/98, 1998/99 and six months of 1999/2000 harvest. Acidity, peroxide value and UV absorption constants were determined for all samples. Fatty acid composition, sterol and aliphatic alcohol contents, saturated fatty acids in the 2-position of the triglyceride and trilinolein content were determined for the virgin olive oils during 1997/98 harvest. The chemical analyses were supported by the determination of polyphenol content expressed as caffeic acid, squalene and α-tocopherol content.Istria y la isla Krk están localizadas en el norte de la región Adriática, República de Croacia. La mayoría de los aceites producidos en las islas de esta región corresponden a la clasificación extra virgen de las variedades (Debela, Naska, Rosulja, Slatka, Buza, Carbonera, Bianchera, Leccino. La caracterización de estos aceites es poco conocida. El objetivo de este trabajo fue la caracterización de los aceites de oliva vírgenes durante las campañas 1997/98, 1998/99 y seis meses de 1999/2000. Para todas las muestras se determinó la acidez, el índice de peróxido y las constantes de absorción en el UV. Para los aceites de oliva vírgenes durante la campaña 1997/98 se determinaron la composición en ácidos grasos, los contenidos en esteroles y alcoholes alifáticos, los ácidos grasos saturados en posición 2 de los triglicéridos y el contenido en trilinoleína. Los análisis químicos se completaron con la determinación del contenido en polifenoles expresado como ácido cafeico, y la determinación de escualeno y α-tocoferol.

  11. Variability of currents in front of the Venice Lagoon, Northern Adriatic Sea

    Energy Technology Data Exchange (ETDEWEB)

    Cosoli, S.; Gacic, M. [Istituto Nazionale di Oceanografia e di Geofisica Sperimentale - OGS, Sgonico (Trieste) (Italy); Mazzoldi, A. [Consiglio Nazionale delle Ricerche - ISMAR-CNR, Venice (Italy). Ist. di Scienze Marine

    2008-07-01

    Time scales and modes of variability of the flow in the water column in the Northern Adriatic Sea for late summer 2002 are described based on current record from a single bottom-mounted ADCP in the shallow-water area in front of the Venice Lagoon. The time averaged flow was directed 277 E (CCW), roughly aligned with the coastline, with typical magnitudes in the range 4-6 cm/s and a limited, not significant clockwise veering with depth. Tidal forcing was weak and mainly concentrated in the semidiurnal frequency band, with a barotropic (depth-independent) structure. On a diurnal time scale, tidal signal was biased by the sea-breeze regime and was characterized by a clockwise veering with depth according to the Ekman spiral. A complex EOF analysis on the velocity profile time series extracted two dominant spatial modes of variability, which explained more than 90% of the total variance in the current field. More than 78% of the total variance was accounted for by the first EOF mode, with a barotropic structure that contained the low-frequency components and the barotropic tidal signal at semidiurnal and diurnal frequencies. The second mode had a baroclinic structure with a zero-crossing at mid-depth, which was related with the response of the water column to the high-frequency wind-driven diurnal sea breeze variability. The response of low-passed non-tidal currents to local wind stress was fast and immediate, with negligible temporal lag up to mid-depth. Currents vectors were pointing to the right of wind stress, as expected from the surface Ekman veering, but with angles smaller than the expected ones. A time lag in the range 10 to 11 h was found below 8 m depth, with current vectors pointing to the left of wind stress and a counterclockwise veering towards the bottom. The delay was consistent with the frictional adjustment time scale describing the dynamics of a frictionally dominated flow in shallow water, thus suggesting the importance of bottom friction on the

  12. Spatial distribution of sardine and anchovy early life stages along the eastern Adriatic Sea

    Directory of Open Access Journals (Sweden)

    Barbara Zorica

    2015-10-01

    Full Text Available Despite long-term investigations of the Adriatic Sea in general and extensive research on sardine and anchovy as ecologically and economically important fish species, knowledge concerning their spawning ecology, precisely their possible spawning grounds, is still incomplete. Therefore, two scientific surveys (January, July 2012 were performed, as target species spawn during different periods of the year (sardine - October to April (Sinovčić et al., 2007 and anchovy - April to September (Zorica et al., 2013. Throughout these surveys, standard vertical plankton tows were made during the daylight at 72 stations in January and 60 stations in July using a WP2 sampler (mouth opening, 0.255 m2; mesh size, 0.200 mm. WP2 net was put vertically down during the calm sea to a depth of 100 m or to 5 m above the seabed in relatively shallow marine area (less than 100 m. Plankton samples were preserved in 4% buffered formalin and transported to the laboratory where they were analysed. Throughout ichtyoplankton analysis of samples collected during the winter survey a total of 506 sardine eggs and 348 larvae were sorted out. The mean sardine egg and larval abundance in the analysed period at positive stations was 57.8 +/- 77.4 eggs/m2 and 29 +/- 25.85 larvae/m2, with peaks of 396 eggs/m2 and 108 larvae/m2 at positive sampling stations. Concerning the summer survey and anchovy early life stages from obtained samples 1489 anchovy eggs and 1036 larvae were isolated. Average abundance of anchovy eggs and larvae was 145.26 +/- 201.27eggs/m2 and 115.11+/- 162.32 larvae/m2, respectively. The highest values of mentioned parameters at positive stations were 800 eggs/m2 and 952 larvae/m2. According to obtained results and their processing within Ocean Data View (odv.awi.de, revile that both species during 2012 spawn above the whole continental shelf and the areas of higher early life stages abundance overlap.

  13. Physicochemical signatures of natural surfactant sea films from coastal Middle Adriatic stations

    Science.gov (United States)

    Frka, Sanja; Pogorzelski, Stanislaw; Kozarac, Zlatica; Ćosović, Božena

    2013-04-01

    Boundary layers between different environmental compartments represent critical interfaces for biological, chemical and physical processes. The sea surface microlayer (SSM) as a top layer of the sea surface represents natural interface between the atmosphere and ocean. Although carbohydrates, proteins, lipids and humic substances. Although lipid material is much less abundant than carbohydrates and proteins in the SML, their contribution to surface activity may be disproportionately large. The surfactant films at the air-sea interface change its physicochemical properties reducing air-sea exchange possesses by impeding molecular diffusion across the interface and influencing the hydrodynamic characteristics of water motion at the interface. Various biological, chemical and physical processes lead to the alteration of the film chemical composition, surface physical properties, surface concentration and spatial distribution of film-forming components. Instead of analyzing its chemical composition, it should be possible to scale the SML surface pressure-area (π-A) isotherms in terms of structural parameters which appear to be a sensitive and quantitative measure of the film physicochemical composition, surface concentration and miscibility of its film-forming components. We will present a large data set obtained by electrochemical and monolayer techniques, accompanied with the novel scaling approach for physicochemical characterization of SA substances of the natural microlayers from coastal Middle Adriatic stations including saline Rogoznica Lake and Krka river estuarine station. Higher primary production during late spring-early autumn is reflected in the presence of microlayers of higher surfactant activity containing on average molecules of lower molecular masses (Mw=0.65±0.27 kDa) and higher miscibility (y=6.46±1.33) and elasticity (E=18.33±2.02 mN/m) modulus in comparison to structural parameters (average Mw=2.15±1.58 kDa; y=3.51±1.46; E=6.41±1.97 m

  14. Carbonate system variability in the Gulf of Trieste (North Adriatic Sea)

    Science.gov (United States)

    Cantoni, Carolina; Luchetta, Anna; Celio, Massimo; Cozzi, Stefano; Raicich, Fabio; Catalano, Giulio

    2012-12-01

    The seasonal variability of the carbonate system in the waters of the Gulf of Trieste (GoT) was studied at PALOMA station from 2008 to 2009, in order to highlight the effects of biological processes, meteorological forcings and river loads on the dynamics of pHT, CO2 partial pressure (pCO2), dissolved inorganic carbon (DIC), carbonate ion concentration (CO3=), aragonite saturation state (ΩAr) and total alkalinity (AT). During winter, low seawater temperature (9.0 ± 0.4 °C) and a weak biological activity (-10.7 trends were observed in the bottom waters. In August 2008, during a hypoxic event (dissolved oxygen DO = 86.9 μmol O2 kg-1), the intense remineralisation of organic carbon caused the rise of pCO2 (1043 μatm) and the decreases of pHT and ΩAr values down to 7.732 and 1.79 respectively. On an annual basis, surface pCO2 was mainly regulated by the pronounced seasonal cycle of seawater temperature. In winter, surface waters in the GoT were under-saturated with respect to atmospheric CO2, thus acting as a sink of CO2, in particular when strong-wind events enhanced air-sea gas exchange (FCO2 up to -11.9 mmol m-2 d-1). During summer, the temperature-driven increase of pCO2 was dampened by biological CO2 uptake, as consequence a slight over-saturation (pCO2 = 409 μatm) turned out. River plumes were generally associated to higher AT and pCO2 values (up to 2859 μmol kg-1 and 606 μatm respectively), but their effect was highly variable in space and time. During winter, the ambient conditions that favour the formation of dense waters on this continental shelf, also favour a high absorption of CO2 in seawater and its consequent acidification (pHT decrease of -0.006 units during a 7-day Bora wind event). This finding indicates a high vulnerability of North Adriatic Dense Water to atmospheric CO2 increase and ocean acidification process.

  15. Changes in the northern Adriatic molluscan community from the Holocene transgression up to the present

    Science.gov (United States)

    Gallmetzer, Ivo; Haselmair, Alexandra; Tomasovych, Adam; Stachowitsch, Michael; Zuschin, Martin

    2016-04-01

    The northern Adriatic Sea is one of the few modern, epicontinental seas comparable to typical Palaeozoic shelf environments. It has a shallow average water depth (pollution, eutrophication, increased sedimentation), making it one of the most degraded marine ecosystems worldwide. Our study was designed to reconstruct major environmental changes here since the onset of the Holocene transgression using down-core changes in death assemblages of molluscs as indicators for ecological shifts. The sediment cores were taken at three different stations (Brijuni Islands, Croatia, off Piran, Slovenia, and off Venice, Italy), each representative of specific sediment and nutrient conditions and degrees of habitat exploitation. The cores were 1.5 m long and had diameters of 90 or 160 mm. For the molluscan shell analyses, sediment subsamples were examined for species composition, abundance, taxonomic similarity and ecological interactions (e.g. frequencies of drilling predation). In total, 98,700 valves and shells were investigated and 113 bivalve and 178 gastropod species recorded. Sedimentation rates derived from 210Pb dating are very low, between 0.15 cm/yr at Brijuni and 0.25 cm/yr at Piran. The dating of Lucinella divaricata, Timoclea ovata and Gouldia minima shells with 14C calibrated amino-acid racemisation (AAR) revealed that the cores at all three stations cover at least 6000 to 8000 years, i.e. the whole Holocene transgression period. Time averaging is high, especially in the lower core layers of Piran station, probably due to strong bioturbation. Surface mixed-layer assemblages tend to show right-skewed postmortem age-frequency distributions, whereas subsurface assemblages show unimodal or uniform shapes. Molluscan assemblages show significant interregional differences that correlate with sedimentation rate, grain size, and the occurrence of organic pollutants and heavy metals. Down-core changes in molluscan communities are also conspicuous in all cores. They partly

  16. Variability of currents in front of the Venice Lagoon, Northern Adriatic Sea

    Directory of Open Access Journals (Sweden)

    S. Cosoli

    2008-05-01

    Full Text Available Time scales and modes of variability of the flow in the water column in the Northern Adriatic Sea for late summer 2002 are described based on current record from a single bottom-mounted ADCP in the shallow-water area in front of the Venice Lagoon.

    The time averaged flow was directed 277° E (CCW, roughly aligned with the coastline, with typical magnitudes in the range 4–6 cm/s and a limited, not significant clockwise veering with depth. Tidal forcing was weak and mainly concentrated in the semidiurnal frequency band, with a barotropic (depth-independent structure. On a diurnal time scale, tidal signal was biased by the sea-breeze regime and was characterized by a clockwise veering with depth according to the Ekman spiral.

    A complex EOF analysis on the velocity profile time series extracted two dominant spatial modes of variability, which explained more than 90% of the total variance in the current field. More than 78% of the total variance was accounted for by the first EOF mode, with a barotropic structure that contained the low-frequency components and the barotropic tidal signal at semidiurnal and diurnal frequencies. The second mode had a baroclinic structure with a zero-crossing at mid-depth, which was related with the response of the water column to the high-frequency wind-driven diurnal sea breeze variability.

    The response of low-passed non-tidal currents to local wind stress was fast and immediate, with negligible temporal lag up to mid-depth. Currents vectors were pointing to the right of wind stress, as expected from the surface Ekman veering, but with angles smaller than the expected ones. A time lag in the range 10 to 11 h was found below 8 m depth, with current vectors pointing to the left of wind stress and a counterclockwise veering towards the bottom. The delay was consistent with the frictional adjustment time scale describing the dynamics of a frictionally dominated flow in shallow water, thus

  17. A late Quaternary multiple paleovalley system from the Adriatic coastal plain (Biferno River, Southern Italy)

    Science.gov (United States)

    Amorosi, Alessandro; Bracone, Vito; Campo, Bruno; D'Amico, Carmine; Rossi, Veronica; Rosskopf, Carmen M.

    2016-02-01

    A buried paleovalley system, up to 2 km wide and exceeding 50 m in relief, made up of multiple cross-cutting depressions incised into the Lower Pleistocene bedrock, is reported from the central Adriatic coastal plain at the mouth of Biferno River. Through a multi-proxy approach that included geomorphological, stratigraphic, sedimentological and paleontological (benthic foraminifers, ostracods and molluscs) investigations, the facies architecture of distinct, superposed valley fills is reconstructed and their relative chronology established along a transverse profile with extremely high data density (average borehole spacing 75 m). Regional tectonic uplift appears as the major controlling factor of initial (Middle Pleistocene) river down-cutting and paleovalley formation. In contrast, glacio-eustatic fluctuations drove fluvial-system response over the last 120 ky, when valley incision was primarily induced by the last glacial base-level lowering and climatic forcing. A fragmented record of coastal and shallow-marine deposits is available for the lower paleovalley fill, which is penetrated by a limited borehole dataset. Multiple erosion phases probably related to the post-MIS 5e sea-level fall are reconstructed from the upper paleovalley fill, where a buried fluvial terrace succession is identified a few tens of meters below the ground surface. The flat surfaces of two buried fluvial terraces suggest longer-term, stepped relative sea-level fall, and are correlated with fluvial incisions that took place possibly at the MIS 5/4 transition and at the MIS 3/2 transition, respectively. A laterally extensive gravel body developed on the valley floor during the Last Glacial Maximum. During the ensuing latest Pleistocene-early Holocene sea-level rise the Biferno paleovalley was transformed into an estuary. Upstream from the maximum shoreline ingression, the vertical succession of well-drained floodplain, poorly-drained floodplain, and swamp deposits evidences increasing

  18. Oceanographic profile chemical, nutrient, and physical data from CTD and bottle casts aboard the R/V Aegaeo in the Adriatic and Mediterranean Seas from February 9, 1995 to February 10, 1995 (NODC Accession 0084544)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — NODC Accession 0084544 includes oceanographic profile chemical, nutrient, and physical data collected aboard the AEGAEO in the Adriatic Sea and Mediterranean Sea...

  19. Development and validation of extensive growth and growth boundary models for psychrotolerant pseudomonads in seafood, meat and vegetable products

    DEFF Research Database (Denmark)

    Martinez Rios, Veronica; Dalgaard, Paw

    ., Int. J. Food Microbiol.216. 110-120, 2016). MIC-values for acetic-, benzoic- and citric acids were determined in broth and terms modelling their antimicrobial effect were added to the model. Cardinal parameter values for CO2 and aw were obtained from literature.The new model included 9 environmental...... literature data. Performance of the new expanded model was equally good for seafood and meat products, and importance of including the effect of acetic, benzoic, citric acids and CO2 in order to accurately predict growth of psychrotolerant pseudomonads was clearly demonstrated e.g. for brined shrimps...

  20. Characterization of anti-Listeria bacteriocins isolated from shellfish: potential antimicrobials to control non-fermented seafood.

    Science.gov (United States)

    Pinto, Ana Luísa; Fernandes, Melissa; Pinto, Cristina; Albano, Helena; Castilho, Fernanda; Teixeira, Paula; Gibbs, Paul A

    2009-01-31

    This work had as main objectives to characterize two bacteriocins produced by lactic acid bacteria (LAB) previously isolated from non-fermented seafood, in order to evaluate their potential as new food protective agents. The two bacteriocinogenic isolates were identified by Polymerase Chain Reaction (PCR) using genus- and species-specific primers, and confirmed by 16S rDNA sequencing, as Enterococcus faecium and Pediococcus pentosaceus. The antimicrobial spectrum of each strain included several indicator microorganisms, some of them also isolated from seafood. Growth of Listeria innocua, L. monocytogenes, Staphylococcus aureus, Bacillus cereus and other LAB species were inhibited, although no inhibition of Gram-negative microorganisms was observed. Proteolytic, but not lipolytic or glycolytic enzymes, completely inactivated the antimicrobial effect of both cell-free supernatants confirming the proteinaceous nature of the inhibitors. The antimicrobial activity was maintained after treatment with NaCl, SDS, Triton X-100, Tween 20, Tween 80 and EDTA after 2 h or 5 h of exposure and both bacteriocins were stable over a wide range of pH and temperatures. Production of bacteriocin by E. faecium (bacALP7) was detected initially at exponential phase and reached a maximum activity of 25,600 AU/ml in the early stationary phase, whereas bacteriocin production by P. pentosaceus ALP57 (bacALP57) reached the maximum at exponential phase with 12,800 AU/ml. The bacteriocins did not kill L. monocytogenes ESB54 nor L. innocua 2030c however, cellular growth was reduced. The partially purified bacteriocins, bacALP7 and bacALP57, were below 6.5 kDa in size as determined by Tricine-SDS gel electrophoresis. E. faecium and P. pentosaceus contained DNA fragments corresponding in size to those recorded for enterocin B and pediocin PA-1, respectively. Sequencing of the fragments from both bacteriocins confirmed the homology. To our knowledge, for the first time two LAB producing bacteriocins

  1. Prevalence and molecular characterization of Vibrio cholerae O1, non-O1 and non-O139 in tropical seafood in Cochin, India.

    Science.gov (United States)

    Kumar, Rakesh; Lalitha, Kuttannappilly V

    2013-03-01

    The objective of this study was to determine the prevalence of O1, O139, and non-O1 and non-O139 Vibrio cholerae, which were associated with fresh and raw seafood samples harvested from Cochin, India waters during 2009-2011. Results from V. cholerae-specific biochemical, molecular, and serological assays identified five El Tor V. cholerae O1 Ogawa strains and 377 non-O1, non-O139 V. cholerae strains from 265 seafood samples. V. cholerae O139 strains were not isolated. Polymerase chain reaction assays confirmed the presence of V. cholerae O1 El Tor biotype in seafood. Antibiotic susceptibility analysis revealed that the V. cholerae O1 strains were pansusceptible to 20 test antibiotics, whereas 26%, 40%, 62%, and 84% of the non-O1, non-O139 V. cholerae strains were resistant to cefpodoxime, ticarcillin, augmentin, and colistin, respectively. Detection of virulence and regulatory genes in V. cholerae associated with seafood revealed the presence of virulence and regulatory genes (i.e., ctx, zot, ace, toxR genes) in V. cholerae O1 strains, nevertheless, presence of ace and toxR genes were detected in non-O1, non-O139 in 9.8 and 91% strains, respectively. In conclusion, the presence of pathogenic V. cholerae in seafood harvested from local Cochin waters warrants the introduction of a postharvest seafood monitoring program, which will lead to a greater understanding of the distribution, abundance, and virulence of diverse pathogenic Vibrio populations that inhabit these different coastal regions so that a risk management program can be established.

  2. Combined observations of a Bora event in the Adriatic Sea by means of ETA model and SAR data

    Science.gov (United States)

    Adamo, Maria; De Carolis, Giacomo; Morelli, Sandra; Rana, Fabio

    2013-04-01

    The Bora is a cold, strong, low level wind which blows from the northeast along the Adriatic coast (Ivančan-Picek and Tutiš, 1996, Lazić and Tošić, 1998, Morelli and Berni, 2002). Bora wind is known to have multiple surface wind jets linked to the orography of the Dinaric Alps and alters significantly the sea status (Cesini et al, 2004). A recent version of the Eta model (Mesinger et al, 2012), which is a three-dimensional, primitive equation, grid-point model, was used to represent the low level wind field corresponding to the Bora event occurred at the beginning of February 2012. Numerical simulations, initialized by ECMWF data, were performed with different horizontal resolutions (approximately 20 km and 4 km) and domain extent. The numerical simulations describe the atmospheric conditions of the period and reveal the spatial structure of the wind, in good agreement with the understanding as well as the observational knowledge of the bora. In addition, the wind speed and direction was estimated on the ASAR images. Wind directions were obtained by exploiting a novel technique based on the use of 2D continuous wavelets (Zecchetto and De Biasio, 2001, 2008). Then, the retrieved wind directions were used to estimate the wind speed from the ASAR NRCS by inverting the semi-empirical backscatter model CMOD-5 (Hersbach, 2005). The ASAR observed morphology, wake patterns and, where present, dual-jet structure of the Bora wind were analysed for 2 and 5 February at the two different Eta resolution scales. Results of the comparisons between Eta prediction and ASAR data will be shown. Cesini D., Morelli S., Parmiggiani F.: Analysis of an intense bora event in the Adriatic area, Natural Hazards and Earth System Sciences, 4, 323-337, 2004. Hersbach H.: CMOD-5. An improved geophysical model function for ERS C-band scatterometry, ECMWF Technical Memorandum 395, Reading, England, pp. 1-50, 2003. Ivančan-Picek, B., Tutiš, V.: A case study of a severe Adriatic bora on 28

  3. The fouling of fish farm cage nets as bioindicator of aquaculture pollution in the Adriatic Sea (Croatia).

    Science.gov (United States)

    Sliskovic, Merica; Jelic-Mrcelic, Gorana; Antolic, Boris; Anicic, Ivica

    2011-02-01

    A fouling assemblage (including density, species richness and diversity, and biomass) growing on netting of fish farm cages was investigated in Stracinska Bay--Location 1 and Peles Bay--Location 2 (Croatia) in order to test the efficiency of fouling as a bioindicator of organic pollution. A total number of 40 algal taxa in Location 1 and total number of 22 algal taxa in Location 2 were identified, with a dominance of opportunistic species (ESG II). We found domination of algal species over animal species and absolute dominance of Rhodophyta which are typical fouler in the Adriatic Sea. Low diversity and species richness with increase in value of the R/P index (occasionally higher than 6) were recorded in Location 2, indicating a certain impact of nutrient enrichment from fish culture facilities on a fouling community structure.

  4. Species variation of Aegilops genus and heavy metal content in plant habitat soil at southern Adriatic localities

    Directory of Open Access Journals (Sweden)

    Dimitrijević Miodrag

    2014-01-01

    Full Text Available The Aegilops genus is a wild relative to the bread wheat, having chromosomes homologous to wheat chromosomes. That genus could be the source of many usefull abiotic stress tolerance genes. Facing a global climate changes, as well as, environmental erosion, it is important to create a desirable genetic variability that could correspond to environmental challenges. Heavy metals in soil could cause soil pollution, could lead to different phenotypic changes in plants, and could enter food chain. Assessment of Aegilops sp. population variation, as well as, heavy metal content in their habitat was the main goal in this research. Aegilops population composition was examined and samples were taken from 55 localities of South Adriatic coastal and littoral areas. Topsoil samples from all the localities were taken and heavy metal content, namely Cr, Pb, Zn, Ni, Cd and Cu, was analyzed,. Manganese content was measured, as well. Value of pH was established.

  5. Northern Adriatic Sea hydrographic conditions from October 2002 – September 2003, including the climatic heating anomaly of summer 2003

    Directory of Open Access Journals (Sweden)

    Nastjenjka SUPIĆ

    2006-12-01

    Full Text Available CTD data were collected during 38 cruises in the northeastern Adriatic from October 2002 to September 2003 and were analyzed in the context of long-term variability (from data collected over a period of 38 years. A prognostic statistical model was created to fit the long-term data and predicted values were compared to those of the in situ CTD measurements. As with air temperatures, values attained by the sea in summer 2003 far exceeded those expected by predictive models and were induced by very large heat input from the atmosphere. In conditions of very low regional freshwater input and intrusions of more saline water masses from the south, salinity values in the spring/summer period lay far outside typical salinity values for the area.

  6. Sources, trends and ecotoxicological risks of PAH pollution in surface sediments from the northern Adriatic Sea (Croatia).

    Science.gov (United States)

    Traven, Luka

    2013-12-15

    In this study, the levels, sources and historical trends (2007-2012) of PAH pollution in surface sediments in the northern Adriatic Sea (Croatia) have been assessed. In addition, ecotoxicological risks have been estimated by evaluating the PAH dataset against Sediment Quality Guidelines (SQGs). The results indicate that PAH in surface sediments are of pyrolitic origin with no clear positive or negative trend in PAH concentration over the investigated period. Evaluations against SQG and mSQGq indicate that surface sediments at all sampling sites have a low to medium ecotoxicological risk. In order to improve trend analysis and characterization of PAH pollution in surface sediments in this region an increase in spatial resolution of sampling points is recommended.

  7. RIGED-RA project - Restoration and management of Coastal Dunes in the Northern Adriatic Coast, Ravenna Area - Italy

    Science.gov (United States)

    Giambastiani, Beatrice M. S.; Greggio, Nicolas; Sistilli, Flavia; Fabbri, Stefano; Scarelli, Frederico; Candiago, Sebastian; Anfossi, Giulia; Lipparini, Carlo A.; Cantelli, Luigi; Antonellini, Marco; Gabbianelli, Giovanni

    2016-10-01

    Coastal dunes play an important role in protecting the coastline. Unfortunately, in the last decades dunes have been removed or damaged by human activities. In the Emilia- Romagna region significant residual dune systems are found only along Ravenna and Ferrara coasts. In this context, the RIGED-RA project “Restoration and management of coastal dunes along the Ravenna coast” (2013-2016) has been launched with the aims to identify dynamics, erosion and vulnerability of Northern Adriatic coast and associated residual dunes, and to define intervention strategies for dune protection and restoration. The methodology is based on a multidisciplinary approach that integrates the expertise of several researchers and investigates all aspects (biotic and abiotic), which drive the dune-beach system. All datasets were integrated to identify test sites for applying dune restoration. The intervention finished in April 2016; evolution and restoration efficiency will be assessed.

  8. Albania – as the Bridge of Routes and Transport Corridors between the Adriatic Sea and Black Sea

    Directory of Open Access Journals (Sweden)

    Ramadan Mazrekaj

    2015-07-01

    Full Text Available Republic of Albania is located in the Western Balkans. Its location in the midst of crossroads for major transit corridors in Europe places Albania in a strategic geographic position. Albania links the western Mediterranean countries with the Balkans and Asia. Its biggest valleys situated in Drin, Shkumbin and Vjose rivers, facilitate the connection of the Balkans with the Adriatic Sea. In the Balkan territory are situated some of the most important Pan - European transport corridors, consisting of: Pan - European Corridor IV, V, VII, VIII, IX and X. Main objective of this paper is the analysis of the development of transport routes and corridors in the Balkans in the context of Pan-European corridors; evaluation of national policy, priorities of Transport, directions of Albania’s main road and their compatibility with the needs of Pan - European connectivity.

  9. Border Reconstruction of Bosnia and Herzegovina's Access to the Adriatic Sea at Sutorina by Consulting Old Maps

    Directory of Open Access Journals (Sweden)

    Nedim Tuno

    2011-12-01

    Full Text Available The paper presents the results of scientific research into the former southernmost Bosnian border by analyzing historical maps. In cartographic representations of the area (created between the mid-17th and mid-20th centuries, state and administrative boundary lines are clearly demarcated. They provide indisputable proof that the Sutorina area belonged to Bosnia and Herzegovina through many centuries, providing access to the Adriatic Sea. The maps presented follow the course of the historical changes in the area which shaped its borders. The extent of the narrow Sutorina corridor was observed by combining data on boundary lines taken from historical maps with the current situation in the area. The technique of georeferencing old maps based on a genetic algorithm was developed for this purpose. 

  10. Marine litter on Mediterranean shores: Analysis of composition, spatial distribution and sources in north-western Adriatic beaches.

    Science.gov (United States)

    Munari, Cristina; Corbau, Corinne; Simeoni, Umberto; Mistri, Michele

    2016-03-01

    Marine litter is one descriptor in the EU Marine Strategy Framework Directive (MSFD). This study provides the first account of an MSFD indicator (Trends in the amount of litter deposited on coastlines) for the north-western Adriatic. Five beaches were sampled in 2015. Plastic dominated in terms of abundance, followed by paper and other groups. The average density was 0.2 litter items m(-2), but at one beach it raised to 0.57 items m(-2). The major categories were cigarette butts, unrecognizable plastic pieces, bottle caps, and others. The majority of marine litter came from land-based sources: shoreline and recreational activities, smoke-related activities and dumping. Sea-based sources contributed for less. The abundance and distribution of litter seemed to be particularly influenced by beach users, reflecting inadequate disposal practices. The solution to these problems involves implementation and enforcement of local educational and management policies.

  11. Aquaculture, Biotechnological and Seafood Resource Potential of Sea Cucumbers from the Peniche coast (Portugal

    Directory of Open Access Journals (Sweden)

    Rita Alves Santos

    2014-06-01

    for aquaculture and also the high biotechnological and seafood potential of the three species.

  12. Analysis of coastal sea-level station records and implications for tsunami monitoring in the Adriatic Apulia region, southern Italy

    Science.gov (United States)

    Bressan, Lidia; Tinti, Stefano; Tallarico, Andrea

    2015-04-01

    The region of Apulia, southern Italy, was theater of one of the largest tsunami disaster in Italian history (the 30 July 1627 event) and is considered to be exposed to tsunami hazard coming from local Italian sources as well as from sources on the eastern side of the Adriatic and from the Ionian sea, including the Hellenic Arc earthquakes. Scientific interest for tsunami studies and monitoring in the region is only recent and this theme was specifically addressed by the international project OTRIONS, coordinated by the University of Bari. In the frame of this project the University of Bologna contributed to the analysis of the tsunami hazard and to the evaluation of the regional tide-gauge network with the scope of assessing its adequacy for tsunami monitoring. This latter is the main topic of the present work. In eastern Apulia, facing the Adriatic sea, the sea-level data network is sufficiently dense being formed of stations of the Italian tide-gauge network (Rete Mareografica Nazionale, RMN), of four additional stations operated by the Apulia Port Authority (in Brindisi, Ischitella, Manfredonia and Porto Cesareo) and of two more stations that were installed in the harbours of Barletta and Monopoli in the frame of the project OTRIONS with real-time data transmission and 1-sec sampling period. Pre-processing of the sea-level data of these stations included quality check and spectral analysis. Where the sampling rate was adequate, the records were also examined by means of the specific tools provided by the TEDA package. This is a Tsunami Early Detection Algorithm, developed by the Tsunami Research Team of the University of Bologna, that allows one to characterize the sea-level background signal in the typical tsunami frequency window (from 1 to several minutes) and consequently to optimize TEDA parameters for an efficient tsunami detection. The results of the analysis show stability of the spectral content and seasonal variations.

  13. Investigation of model capability in capturing vertical hydrodynamic coastal processes: a case study in the north Adriatic Sea

    Science.gov (United States)

    McKiver, W. J.; Sannino, G.; Braga, F.; Bellafiore, D.

    2016-01-01

    In this work we consider a numerical study of hydrodynamics in the coastal zone using two different models, SHYFEM (shallow water hydrodynamic finite element model) and MITgcm (Massachusetts Institute of Technology general circulation model), to assess their capability to capture the main processes. We focus on the north Adriatic Sea during a strong dense water event that occurred at the beginning of 2012. This serves as an interesting test case to examine both the models strengths and weaknesses, while giving an opportunity to understand how these events affect coastal processes, like upwelling and downwelling, and how they interact with estuarine dynamics. Using the models we examine the impact of setup, surface and lateral boundary treatment, resolution and mixing schemes, as well as assessing the importance of nonhydrostatic dynamics in coastal processes. Both models are able to capture the dense water event, though each displays biases in different regions. The models show large differences in the reproduction of surface patterns, identifying the choice of suitable bulk formulas as a central point for the correct simulation of the thermohaline structure of the coastal zone. Moreover, the different approaches in treating lateral freshwater sources affect the vertical coastal stratification. The results indicate the importance of having high horizontal resolution in the coastal zone, specifically in close proximity to river inputs, in order to reproduce the effect of the complex coastal morphology on the hydrodynamics. A lower resolution offshore is acceptable for the reproduction of the dense water event, even if specific vortical structures are missed. Finally, it is found that nonhydrostatic processes are of little importance for the reproduction of dense water formation in the shelf of the north Adriatic Sea.

  14. Holocene vegetation and climate changes in central Mediterranean inferred from a high-resolution marine pollen record (Adriatic Sea

    Directory of Open Access Journals (Sweden)

    N. Combourieu-Nebout

    2013-04-01

    Full Text Available To understand the effects of future climate change on the ecology of the central Mediterranean we can look to the impacts of long-term, millennial to centennial-scale climatic variability on vegetation in the basin. Pollen data from the Adriatic Marine core MD 90-917 allows us to reconstruct vegetation and regional climate changes over the south central Mediterranean during the Holocene. Clay mineral ratios from the same core reflect the relative contributions of riverine (illite and smectite and eolian (kaolinite contributions to the site, and thus act as an additional proxy with which to test precipitation changes in the Holocene. Vegetation reconstruction shows vegetation responses to the late-Glacial Preboreal oscillation, most likely driven by changes in seasonal precipitation. Pollen-inferred temperature declines during the early-mid Holocene, but increases during the mid-late Holocene, similar to southern-western Mediterranean climatic patterns during the Holocene. Several short climatic events appear in the record, indicating the sensitivity of vegetation in the region to millennial-scale variability. Reconstructed summer precipitation shows a regional maximum between 8000 and 7000 cal yr BP similar to the general pattern across southern Europe. Two important shifts in vegetation occur at 7700 and between 7500 and 7000 yr. These vegetation shifts are linked to changes in seasonal precipitation and are correlated to increased river inputs respectively from the north (7700 event and from the central Adriatic borderlands (7500–7000 event. These results reinforce the strengths of multi-proxy analysis and provide a deeper understanding of the role of precipitation and particularly the seasonality of precipitation in mediating vegetation change in the central Mediterranean during the Holocene.

  15. The Gulf of Manfredonia: a new neritic foraging area for loggerhead sea turtles in the Adriatic Sea

    Directory of Open Access Journals (Sweden)

    Paolo Casale

    2012-07-01

    Full Text Available The Adriatic Sea is an important foraging area for the loggerhead sea turtle, Caretta caretta, but neritic habitats for this species along the Italian coast were identified in the northern shallow area only. The Gulf of Manfredonia is a relatively wide shallow area in the south-west Adriatic and its features and preliminary information make it a potential foraging ground for turtles. In order to assess sea turtle occurrence in the area, we monitored seven bottom trawlers based in the port of Manfredonia during the period Oct 2010 – Jul 2011 through a voluntary logbook programme, resulting in a total of 62 turtle captures during 617 fishing days. Since a turtle capture represents a rare event during such sampling, data were analysed by a zero-inflated Poisson (ZIP model. Results indicate that: (i the Gulf is a neritic foraging ground for loggerhead turtles which occur there with a relatively high density comparable to other Mediterranean foraging grounds, (ii it is frequented by a wide range of size classes, including small juveniles as well as adults, (iii the highest occurrence is during the period Jun-Dec, (iv over 1700 turtle captures occur in the Gulf annually. Preliminary findings about recaptured individuals suggest that part of the turtles are resident in the area. The peculiar features of the Gulf of Manfredonia and the collaboration of the fishing fleet, make it a valuable index site for studying current trends of sea turtle populations at sea as well as other aspects of sea turtle biology and conservation.

  16. An ecological model of the Northern and Central Adriatic Sea: Analysis of ecosystem structure and fishing impacts

    Science.gov (United States)

    Coll, Marta; Santojanni, Alberto; Palomera, Isabel; Tudela, Sergi; Arneri, Enrico

    2007-08-01

    A trophic mass-balance model was developed to characterise the food web structure and functioning of the Northern and Central Adriatic Sea and to quantify the ecosystem impacts of fishing during the 1990s. Forty functional groups were described, including target and non-target fish and invertebrate groups, and three detritus groups (natural detritus, discards and by-catch of cetaceans and marine turtles). Results highlighted that there was an important coupling between pelagic-benthic production of plankton, benthic invertebrates and detritus. Organisms located at low and medium trophic levels, (i.e. benthic invertebrates, zooplankton and anchovy), as well as dolphins, were identified as keystone groups of the ecosystem. Jellyfish were an important element in terms of consumption and production of trophic flows within the ecosystem. The analysis of trophic flows of zooplankton and detritus groups indirectly underlined the importance of the microbial food web in the Adriatic Sea. Fishing activities inflicted notable impacts on the ecosystem during the 1990s, with a high gross efficiency of the fishery, a high consumption of fishable production, high exploitation rates for various target and non target species, a low trophic level of the catch and medium values of primary production required to sustain the fishery. Moreover, the analysis of Odum's ecological indicators highlighted that the ecosystem was in a low-medium developmental stage. Bottom trawling ( Strascico), mid-water trawling ( Volante) and beam trawling ( Rapido) fleets had the highest impacts on both target and non target ecological groups. On the contrary, purse seining ( Lampara) showed medium to low impacts on the ecosystem; cetaceans, marine turtles and sea birds were not significantly involved in competition with fishing activity.

  17. Human exposure to PCDD/Fs and PCBs through consumption of fish and seafood in Catalonia (Spain): Temporal trend.

    Science.gov (United States)

    Perelló, Gemma; Díaz-Ferrero, Jordi; Llobet, Juan M; Castell, Victòria; Vicente, Emilio; Nadal, Martí; Domingo, José L

    2015-07-01

    The concentrations of PCDD/Fs and 18 PCBs (DL- and NDL-) were analyzed in 16 fish and seafood species widely consumed in Catalonia (Spain). The exposure of these pollutants was subsequently estimated according to various groups of population. The concentrations of PCDD/Fs and PCBs showed an important decrease in relation to the baseline study (2000) and our last survey (2008). Sardine and red mullet were the species showing the highest pollutant concentrations, while canned tuna and cuttlefish presented the lowest levels. Sardine was the main contributor to the exposure of PCDD/Fs and PCBs. In contrast, swordfish was the species with the lowest contribution to the exposure of PCDD/Fs, DL-PCBs, and PCDD/Fs+DL-PCBs, while clam was the minor contributor for NDL-PCBs and total PCBs. For all groups of population, the current intakes of PCDD/Fs and PCBs were lower than the TDI (1-4 pg WHO-TEQ/kg body weight/day), being children the group with the highest exposure. However, this exposure should not mean a health risk for this group of population. The current intake of PCDD/Fs and PCBs through fish and seafood consumption was similar or even lower than most values reported in recent studies all over the world.

  18. Developed of a method for the genetic identification of ling species (Genypterus spp.) in seafood products by FINS methodology.

    Science.gov (United States)

    Santaclara, Francisco J; Pérez-Martín, Ricardo I; Sotelo, Carmen G

    2014-01-15

    In the present work a method of authentication of Genypterus and their substitute species was developed, by means of Polymerase Chain Reaction (PCR) technique followed by phylogenetic analysis (FINS, Forensically Informative Nucleotide Sequencing). The methodology developed allows the identification of all the studied species using the mitochondrial cytochrome oxidase subunit I gene (COXI) as molecular marker. Substitutions of the species belonging to Genypterus genera by other species with minor value can take place, since in a lot of seafood products , is not possible the assignation to a particular species based on morphological traits, because it are removed in the transformation process. In this work several methodological strategies were developed and all of them allow the authentication of the studied species in any kind of products, from fresh or frozen fish, to ready-cooked meal. Therefore, the proposed methodology can be used as a routine method to avoid the mislabelling in the marketing of Genypterus species. Also this methodological approximation is suitable to assess the correct seafood traceability of the products elaborated from the mentioned species.

  19. Listeria monocytogenes and ready-to-eat seafood in Spain: study of prevalence and temperatures at retail.

    Science.gov (United States)

    González, David; Vitas, Ana Isabel; Díez-Leturia, María; García-Jalón, Isabel

    2013-12-01

    The aim of this study was to obtain data from refrigerated ready-to-eat seafood products at retail in Spain (young eels, crabstick and smoked salmon), regarding prevalence and levels of Listeria monocytogenes, storage temperatures and the impact of transport conditions (type of bag) on the temperature of the product. The one-year surveillance period was carried out according to the EC Regulation No. 2073/2005, taking 5 units/batch and analyzing 250 samples following ISO 11290-1/A1 and ISO 11290-2/A methodologies. Low prevalence of L. monocytogenes was observed in surimi products, while 4.8% of smoked salmon samples were positive for Listeria with low levels (plastic shopping bags were used for transport, respectively. To avoid noncompliance of the Food Safety Objective for L. monocytogenes in seafood RTE products more efforts from all stakeholders are needed, with special attention so as to improve control and maintenance of refrigerators at retail and to enhance consumer education regarding food safety practices.

  20. Human impacts on the evolution of Rosolina Mare (Northern Adriatic, Italy): first results

    Science.gov (United States)

    Corbau, Corinne; Simeoni, Umberto

    2013-04-01

    The Italian coasts have undergone profound changes over the last century, in particular after the late 1950's. With the tourism industry development, the coastal system has been hardened resulting in the drastic reduction of its evolutive capacity. Human activity has therefore become a geological agent that has affected the evolution of the coastal zone both directly and indirectly in the last century. This study focuses on some of the coastal morphologies that have been modified by human actions in long and medium-term. The research was based on a comparison of sixty-year changes in land use, on dune-beach system and on the nearshore of Rosolina (Northern Adriatic, Italy). This coastal sandy zone extends over about 8 km in a N-NE - S-SW direction, and is delimited by the Adige River to the north and by the Porto Caleri to the south. This littoral, characterized by highly humanized stretches and natural stretches without human activities, can be divided into three parts: the first in the north, about 2 km long, where the beach is almost non-existent, the second in the central part long about 3 km, with a wide beach and completely built up for tourism, and the third in the south, about 3 km long, is within a natural park and is characterized by a wide beach bordered by a complex dune system. In the central part the coastal dunes present the greater heights, with an average of about +7 m (+ 4.5 m to +11 m); in the northern part the rare dunes reach heights of about +5 m (+4.5 m to +5.5 m). In the southern part the dunes present lower heights averaging +4.2 m (from +3 m to +5.5 m). The conservation state of the dunes is the result of coastal anthropization: blowouts and breaches in the coastal dune system are observed where there was the greatest urban development to allow users access to the beach. These "passages", however, constitute preferential sediment paths out of the beach as sediments are no longer stopped by the dune and its vegetation and are thus

  1. Temperature impact on the growth of Salmonella spp. in raw seafood

    Science.gov (United States)

    In recent years, there has been foodborne illness outbreaks linked to the consumption of raw yellow-fin tuna contaminated with Salmonella. In this study, the growth behavior of Salmonella spp. on raw yellow-fin tuna fillet at temperatures 4 – 22 deg C was determined. The final cell population, lag ...

  2. {sup 210}Pb dating of sediments from the central and the northern Adriatic Sea: The deposition and preservation of sedimentary organic carbon

    Energy Technology Data Exchange (ETDEWEB)

    Hamilton, T.; Fowler, S.; Miquel, J.C.; La Rosa, J.

    1996-04-01

    A central goal of the ELNA project is to assess the carbon assimilation capacity of the Northern Adriatic Sea. This requires fundamental quantitative information on budgets and sinks of organic carbon. Any change in carbon production in the water column should be reflected in the underlying sediments. Moreover, the fraction of particulate organic carbon reaching the sea floor which is subsequently preserved in the sediment will be strongly coupled to sediment accumulation and mixing. In this study a series of box cores were collected in order to characterize a hypothetical eutrophication gradient extending from the Po River outflow region in the north down to the shallow meso-Adriatic depression (Jabuka Pit). The main tasks assigned to IAEA-MEL were to provide {sup 210}Pb derived sedimentation and dry-mass accumulation rates and to examine the possible correlations between sedimentary processes, the deposition and preservation of sedimentary organic carbon and pelagic primary productivity.

  3. Discussion on sea level fluctuations along the Adriatic coasts coupling to climate indices forced by solar activity: Insights into the future of Venice

    Science.gov (United States)

    Zanchettin, Davide; Traverso, Pietro; Tomasino, Mario

    2006-04-01

    The North Atlantic Oscillation (NAO), which is a dominant circulation pattern in Northern Hemisphere winter, is known to affect sea-level variability in the Mediterranean Sea mainly through the hydrostatic response of water masses to pressure anomalies and changes in evaporation/precipitation budgets. In this study the influence of the NAO on sea levels along the Adriatic coasts is re-assessed in the attempt to uncover the potential causes of the observed high sensitivity of the northern basin to NAO fluctuations. The investigation is focused on the role of the NAO as forcing factor of the winds blowing in the area and of the freshwaters input from the Po River, both of which influence the hydrodynamics of the Northern Adriatic. In addition, some insights into the future of Venice are discussed on the basis of the hypothesis that NAO phases are modulated by the varying solar activity through the intensity of the Earth's geomagnetic activity.

  4. Comment on 'inflow, levels and the fate of some persistent chlorinated hydrocarbons in the Rijeka Bay area of the Adriatic Sea by N. Picer and M. Picer'

    Digital Repository Service at National Institute of Oceanography (India)

    Sarkar, A.

    around the Rijeka Bay of the Adriatic Sea. The first and foremost anomaly in this paper is the ambiguous presentation of the analytical procedure with regard to the analyses of the aquatic samples. While the paper dealt exclusively with the extraction... of various organochlorine compounds from the water samples, the analytical procedure referred to the method intercalibrated on different kinds of samples, i.e. shrimp homogenate and fish homogenate (Anonymous, 1988). Although they referred...

  5. A list of Y-O-Y fish species found in the littoral shallows of the Neretva and Mala Neretva estuaries (Eastern Adriatic, Croatian coast

    Directory of Open Access Journals (Sweden)

    Vlasta BARTULOVIĆ

    2007-06-01

    Full Text Available Young-of-the-Year (Y-O-Y fish in the littoral shallows of the Neretva and Mala Neretva estuaries comprises a highly diverse fish community composed of 68 species representing 28 families. Gobiidae represent the most diverse family followed by Sparidae, Mugilidae and Soleidae. Moreover, more than 64.7% (44 species of the Y-O-Y species caught are among the species that form the main targets for commercial fisheries in the southern Adriatic.

  6. Comparative Morphometric Analysis of the Smallscaled Scorpionfish, Scorpaena Porcus (Scorpaenidae, Scorpaeniformes, from the Southern Coast of the Crimea and Eastern Part of the Adriatic Sea

    Directory of Open Access Journals (Sweden)

    Manilo L. G.

    2016-12-01

    Full Text Available Comparative analysis of morphometric characters of small-scaled scorpionfish from the Black Sea (near the southern coast of the Crimea and from the eastern part of the Adriatic Sea showed significant differences in males and females on thirteen plastic and three meristic characters. These differences may be due to unequal abiotic and biotic habitat conditions, and refer about the geographical variability of the species, indicating the presence of two different populations in the study area.

  7. THE LIBERATION OF ARSENOSUGARS FROM MATRIX COMPONENTS IN DIFFICULT TO EXTRACT SEAFOOD SAMPLES UTILIZING TMAOH/ACETIC ACID SEQUENTIALLY IN A TWO-STAGE EXTRACTION PROCESS

    Science.gov (United States)

    Sample extraction is one of the most important steps in arsenic speciation analysis of solid dietary samples. One of the problem areas in this analysis is the partial extraction of arsenicals from seafood samples. The partial extraction allows the toxicity of the extracted arse...

  8. Evaluation of a real-time polymerase chain reaction (PCR) assay for detection of anisakis simplex parasite as a food-borne allergen source in seafood products.

    Science.gov (United States)

    Lopez, Itziar; Pardo, Miguel Angel

    2010-02-10

    Anisakis simplex has been recognized as an important cause of disease in humans and as a food-borne allergen source. Actually, this food-borne parasite was recently identified as an emerging food safety risk. An A. simplex -specific primer-probe system based on a real-time polymerase chain reaction (PCR) detection assay has been successfully optimized and validated with seafood samples. In addition, a DNA extraction procedure has been optimized to detect the presence of the nematode in food samples. The assay is a very reliable, specific, and sensitive methodology to detect the presence of traces of this parasite in seafood products, including highly processed samples. As a result, 13 sequences of cytochrome c oxidase II gene were obtained and scrutinized to calculate intra- and interspecific variabilities of 0 and 35-67%, respectively. Finally, an efficiency of 2.07 +/- 0.14 of the assay was calculated, and a limit of detection of 40 ppm parasite in 25 g of sample was also optimized. Actually, the presence of this parasite in several seafood products has been demonstrated, enforcing the necessity of a design for a good manufacturing practice protocol for the processing industry to minimize the presence of this parasite as a food-borne allergen source in seafood products.

  9. Louisiana residents' self-reported lack of information following the Deepwater Horizon oil spill: Effects on seafood consumption and risk perception.

    Science.gov (United States)

    Simon-Friedt, Bridget R; Howard, Jessi L; Wilson, Mark J; Gauthe, David; Bogen, Donald; Nguyen, Daniel; Frahm, Ericka; Wickliffe, Jeffrey K

    2016-09-15

    In 2010, the Deepwater Horizon (DWH) oil spill adversely impacted many communities along the Gulf of Mexico. Effects on Gulf waters, marshes, aquatic life, and fisheries were evident in the following days, months, and years. Through studying affected communities' perceptions regarding the DWH accident, we aim to identify behavioral changes, understand public information sources, and inform dissemination strategies that improve communications from regulatory agencies. Over a three-year period (2012-2015), residents (n = 192) from 7 coastal parishes in southeast Louisiana were surveyed about their perceptions and behaviors before, during, and after the DWH accident. Self-reported consumption of local seafood decreased significantly (50%) during the DWH oil spill but returned to pre-event reported levels by 2015. However, negative seafood quality perceptions remain and have not returned to what were generally positive pre-event levels. Over 30% of study participants trust relatives, friends, and neighbors more than government officials or scientists as information sources regarding locally harvested seafood. Importantly, nearly 50% of participants report that they lack the information needed to make informed decisions regarding the safety of consuming local seafood. We conclude that a lack of information and trust in government agencies exacerbated negative perceptions of oil spill-related dangers. In some cases, overestimation of perceived dangers likely led to behavioral modifications that persist today. Efforts should be made to improve relationships between public health agencies and communities in order to properly inform all citizens of risks following environmental disasters.

  10. Louisiana residents’ self-reported lack of information following the Deepwater Horizon oil spill: Effects on seafood consumption and risk perception

    Science.gov (United States)

    Simon-Friedt, Bridget R.; Howard, Jessi L.; Wilson, Mark J.; Gauthe, David; Bogen, Donald; Nguyen, Daniel; Frahm, Ericka; Wickliffe, Jeffrey K.

    2016-01-01

    In 2010, the Deepwater Horizon (DWH) oil spill adversely impacted many communities along the Gulf of Mexico. Effects on Gulf waters, marshes, aquatic life, and fisheries were evident in the following days, months, and years. Through studying affected communities’ perceptions regarding the DWH accident, we aim to identify behavioral changes, understand public information sources, and inform dissemination strategies that improve communications from regulatory agencies. Over a three-year period (2012 −2015), residents (n = 192) from 7 coastal parishes in southeast Louisiana were surveyed about their perceptions and behaviors before, during, and after the DWH accident. Self-reported consumption of local seafood decreased significantly (50%) during the DWH oil spill but returned to pre-event reported levels by 2015. However, negative seafood quality perceptions remain and have not returned to what were generally positive pre-event levels. Over 30% of study participants trust relatives, friends, and neighbors more than government officials or scientists as information sources regarding locally harvested seafood. Importantly, nearly 50% of participants report that they lack the information needed to make informed decisions regarding the safety of consuming local seafood. We conclude that a lack of information and trust in government agencies exacerbated negative perceptions of oil spill-related dangers. In some cases, overestimation of perceived dangers likely led to behavioral modifications that persist today. Efforts should be made to improve relationships between public health agencies and communities in order to properly inform all citizens of risks following environmental disasters. PMID:27289418

  11. Human exposure to trace metals and possible public health risks via consumption of mussels Mytilus galloprovincialis from the Adriatic coastal area.

    Science.gov (United States)

    Jović, Mihajlo; Stanković, Slavka

    2014-08-01

    Considering the growing concern due to different levels of anthropogenic loadings, the main purpose of this study was to identify the levels of trace metals (Fe, Mn, Cu, Zn, Co, Ni, Cd, Pb and Hg) in the mussels Mytilus galloprovincialis sampled along the marine coast of Boka Kotorska Bay, Montenegro. In comparison with the permissible limits set by the EU and the US FDA, all trace metal concentrations found in the mussels from the coastal area of Boka Kotorska Bay were lower than the prescribed limits. Generally, the trace metal concentrations found in Montenegrin mussels are within the range of trace metal concentrations determined in low to moderately polluted Adriatic areas. Based on these and other available literature data published by other authors for Adriatic region, the public health risks associated with the consumption of mussels in relation to reported trace metal concentrations were evaluated. In terms of the obtained trace metals concentrations in mussels and the provisional tolerable weekly intake prescribed by the JECFA and oral reference doses by the US EPA, the Pb and Cd concentrations and the Co and Cd concentrations were recognized as the limiting factor for the consumption of mussels from some Adriatic areas, respectively.

  12. Human exposure to lead, cadmium and mercury through fish and seafood product consumption in Italy: a pilot evaluation.

    Science.gov (United States)

    Pastorelli, A A; Baldini, M; Stacchini, P; Baldini, G; Morelli, S; Sagratella, E; Zaza, S; Ciardullo, S

    2012-01-01

    The presence of selected toxic heavy metals, such as cadmium (Cd), lead (Pb) and mercury (Hg), was investigated in fish and seafood products, namely, blue mussel, carpet shell clam, European squid, veined squid, deep-water rose shrimp, red mullet, European seabass, gilthead seabream, Atlantic cod, European hake, Atlantic bluefin tuna and swordfish so as to assess their human exposure through diet. Metals were detected by quadrupole inductively coupled plasma mass spectrometry (Q-ICP-MS) and hydride generation atomic absorption spectrometry (Hg-AAS). Measurements of Cd, Pb and Hg were performed by means of analytical methods validated in compliance with UNI CEI EN ISO/IEC 17025 [2005. General requirements for the competence of testing and calibration laboratories. Milano (Italy): UNI Ente Nazionale Italiano di Unificazione]. The exposure assessment was undertaken matching the levels of Cd, Pb and total Hg with consumption data related to fish and seafood products selected for this purpose. In order to establish human health implications, the estimated weekly intakes (EWIs) for Cd, Pb and Hg were compared with the standard tolerable weekly intakes (TWI) for Cd and provisional tolerable weekly intakes (PTWIs) for Pb and Hg stipulated by the European Food Safety Authority (EFSA) and the Food and Agriculture Organization/World Health Organization (FAO/WHO) Joint Expert Committee on Food Additives (JECFA). The found metal concentrations were largely below the maximum levels (MLs) established at the European Union level with the exception of Cd. This metal exceeded the MLs in squid, red mullet, European hake and Atlantic cod. Squid and blue mussel showed the highest Pb concentrations which accounted for 60% and 10% of the MLs, respectively. Highest Hg levels were found in predatory fish. The concentrations of Hg in swordfish, Atlantic bluefin tuna and red mullet accounted for 50%, 30% and 30% of the MLs, respectively. The EWIs for Cd, Pb and Hg related to the consumption

  13. Isolation and characterization of halophilic lactic acid bacteria isolated from "terasi" shrimp paste: a traditional fermented seafood product in Indonesia.

    Science.gov (United States)

    Kobayashi, Takeshi; Kajiwara, Michika; Wahyuni, Mita; Kitakado, Toshihide; Hamada-Sato, Naoko; Imada, Chiaki; Watanabe, Etsuo

    2003-10-01

    Lactic acid bacteria from "terasi" shrimp paste, a highly popular fermented seafood in Indonesia were isolated and characterized. Viable cell counts were 10(4) to 10(6) cfu/g on MRS medium. All the isolates were catalase-negative, gram-positive cocci and were able to grow at 15% NaCl. Numerical phenotypic analysis showed that the isolates clustered into one group. However, they could be classified into two types: the Tetragenococcus halophilus group and the T. muriaticus group as revealed by a restriction fragment length polymorphism (RFLP) analysis and sequencing of the 16S rRNA gene. This study is the first to show that both species of Tetragenococcus are distributed in Indonesian fermented foods.

  14. Harvesting contaminants from liquid

    Energy Technology Data Exchange (ETDEWEB)

    Simpson, John T.; Hunter, Scott R.

    2016-05-31

    Disclosed are examples of apparatuses for evaporative purification of a contaminated liquid. In each example, there is a vessel for storing the contaminated fluid. The vessel includes a surface coated with a layer of superhydrophobic material and the surface is at least partially in contact with the contaminated liquid. The contaminants do not adhere to the surface as the purified liquid evaporates, thus allowing the contaminants to be harvested.

  15. Assessing trace metal contamination and organic matter in the brackish lakes as the major source of potable water.

    Science.gov (United States)

    Cuculić, Vlado; Cukrov, Neven; Kwokal, Željko; Strmečki, Slađana; Plavšić, Marta

    2017-03-14

    On small and medium karstic coastal islands in the Adriatic Sea, brackish lakes are often the only source of freshwater. Therefore, it is important to adequately evaluate the biogeochemical processes occurring in these complex water systems, as well as to determine the origin of contaminants present. In this study, the distribution and origin of trace metals (Tl, Hg, Cd, Pb, Cu, Zn, Ni, Co) and organic matter in the water column, sediment, and surrounding soil of the brackish lakes on Mljet Island, South Adriatic Sea, Croatia, were evaluated. Thallium and mercury concentrations in the lake water were up to two orders of magnitude higher compared to ranges found in the adjacent coastal sea water. Elevated thallium concentrations were of anthropogenic origin resulting from previous use of rodenticide, while elevated mercury content was naturally enhanced. Levels for the other metals were characteristic of uncontaminated water systems. Speciation modelling showed that dissolved trace metals such as Cu, Pb, and Zn were mostly associated with organic matter, while Tl, Co, and Ni were present predominantly as free ions and inorganic complexes. The presence of organic matter (OM) clearly influenced the speciation and distribution of some trace metals. OM was characterised by the determination of the complexing capacity for Cu ions (CuCC), surface active substances, and catalytically active compounds. Reduced sulphur species (glutathione and other thiols) representing significant Cu-binding ligands were determined and discussed as well.

  16. The role of dunes in contrasting saltwater intrusion in coastal areas; a case study in the southern Po Plain Adriatic coast (Ravenna, Northern Italy)

    Science.gov (United States)

    Marconi, V.; Antonellini, M.; Balugani, E.; Minchio, A.; Gabbianelli, G.

    2009-04-01

    Due to climate changes and to anthropogenic interventions, saltwater intrusion is affecting the aquifers and the surface water of the Po plain along the Adriatic coast. During the last decade, we recognized in this area a pattern of climate change: precipitations are less frequent and the yearly amount of rain is concentrated in a few strong storm events. This pattern results in an increase of gales strength during the winter, which causes shoreline retreat and an erosion of the coastal dunes. The coastal part of the Po plain consists of a low-lying and mechanically-drained farmland further from the sea and of a narrow belt of dunes and pine forests in the backshore area. The wide sandy beaches are now retreating and the dune system (only a few meters in height) is almoust destroyed, because of tourism development and of disaggregated rivers and shorelines management. A still active dune system is preserved in our study area, a coastal plain included between the Fiumi Uniti and Bevano rivers near the city of Ravenna. As a result of an intensive exploitation of coastal aquifers for agricultural, industrial, and civil uses, both the phreatic aquifer and the surface waters have been contaminated by seawater. Despite its value for the natural ecosystem and the agricultural soil, the phreatic aquifer is not considered of interest by the regional authorities responsible for water management. A detailed hydrogeological survey was performed by our research group during the Summer 2008 within the framework of the CIRCLE-ERANET project WATERKNOW on the effects of climate change on the mediterranean catchments. In this survey 29 auger holes with an average spacing of 350 m where drilled with the objective of determining the top groundwater quality in the coastal aquifer. At the same time, we measured the chemical and physical parameters of the surface waters. The data collected in the field show that a fresh groundwater lens is still present in the aquifer of the backshore

  17. Water-gas dynamics and coastal land subsidence over Chioggia Mare field, northern Adriatic Sea

    Science.gov (United States)

    Teatini, Pietro; Baú, Domenico; Gambolati, Giuseppe

    2000-09-01

    A major development programme comprising 15 gas fields of the northern Adriatic Sea has recently been submitted to the Ministry of the Environment, VIA Committee for the assessment of the environmental impact, by ENI-Agip, the Italian national oil company. One of the largest reservoirs is Chioggia Mare, located about 10 km offshore of the Venetian littoral, with a burial depth of 1000-1400 m. The planned gas production from this field is expected to impact the shoreline stability with a potential threat to the city of Venice, 25 km northwest of the center of Chioggia Mare. To evaluate the risk of anthropogenic land subsidence due to gas withdrawal, a numerical model was developed that predicts the compaction of both the gas-bearing formations and the lateral/bottom aquifer (water drive) during a 13-year producing and a 12-year post-production period, and the transference of the deep compaction to the ground surface. To address the uncertainty of a few important hydromechanical parameters, several scenarios are simulated and the most pessimistic predictions obtained. The modeling results show that at most 1 cm of land subsidence over 25 years may be expected at the city of Chioggia, whereas Venice is not subject to settlement. If aquifer drawdown is mediated by water injection, land subsidence is arrested 5 km offshore, with the Chioggia littoral zone experiencing a rebound of 0.6-0.7 cm. Résumé. Un important programme de développement portant sur 15 gisements de gaz du nord de l'Adriatique a été récemment soumis au Comité VIA pour l'évaluation de l'impact sur l'environnement du Ministère de l'Environnement, par la société ENI-Agip, la compagnie nationale pétrolière italienne. L'un des plus importants réservoirs est celui de Chioggia Mare, situé à environ 10 km au large du littoral vénitien, à une profondeur de 1000 à 1400 m. La production de gaz prévue pour ce gisement laisse envisager un impact sur la stabilité du trait de côte, avec une

  18. 我国海产品电子商务发展对策研究%Seafood e-commerce development countermeasure research in China

    Institute of Scientific and Technical Information of China (English)

    赖媛媛; 韩立民

    2015-01-01

    我国网络购物群体规模不断扩大,海产品电子商务也随之兴起并迅速发展。本文主要通过对淘宝指数的数据分析,总结了当前我国海产品电子商务具有参与主体单一、消费区域广阔、销售途径多样化、消费群体差异大、品牌价值低等特点。从产品标准、配送体系、信息技术、销售策略等方面分析了我国海产品电子商务存在的问题,在宏观层面上提出制定海产品电子商务规范、健全海产品物流配送体系、加强信息网络建设、培养海产品电商人才等建议;在营销策略层面提出加强品牌建设、重视内陆市场、重视移动终端客户、提高网络营销技巧等对策建议。%China's online shopping population scale expands unceasingly, seafood e-commerce develop rapidly. Mainly through the Taobao index data analysis, this article summed up the characteristics of the current seafood electronic commerce in our country such as single participants , wide consumption area, marketing way diversification, large difference of consumer groups and low brand value. This article analyzed the problem of seafood electronic commerce in our country in product standard, distribution system, information technology, sales strategy, etc. this article pointed out at the macro level of seafood electronic commerce norm, the seafood logistics distribution system, to strengthen the construction of information network, cultivating seafood such as electric business advice; In the aspect of marketing strategy is put forward to strengthen the construction of brand, attaches great importance to the inland market, attaches great importance to the mobile terminal customers, improve the network marketing skills, etc.

  19. Coding early naturalists' accounts into long-term fish community changes in the Adriatic Sea (1800-2000.

    Directory of Open Access Journals (Sweden)

    Tomaso Fortibuoni

    Full Text Available The understanding of fish communities' changes over the past centuries has important implications for conservation policy and marine resource management. However, reconstructing these changes is difficult because information on marine communities before the second half of the 20(th century is, in most cases, anecdotal and merely qualitative. Therefore, historical qualitative records and modern quantitative data are not directly comparable, and their integration for long-term analyses is not straightforward. We developed a methodology that allows the coding of qualitative information provided by early naturalists into semi-quantitative information through an intercalibration with landing proportions. This approach allowed us to reconstruct and quantitatively analyze a 200-year-long time series of fish community structure indicators in the Northern Adriatic Sea (Mediterranean Sea. Our analysis provides evidence of long-term changes in fish community structure, including the decline of Chondrichthyes, large-sized and late-maturing species. This work highlights the importance of broadening the time-frame through which we look at marine ecosystem changes and provides a methodology to exploit, in a quantitative framework, historical qualitative sources. To the purpose, naturalists' eyewitness accounts proved to be useful for extending the analysis on fish community back in the past, well before the onset of field-based monitoring programs.

  20. Biomonitoring of heavy metals and arsenic on the east coast of the Middle Adriatic Sea using Mytilus galloprovincialis

    Science.gov (United States)

    Orescanin, Višnja; Lovrencic, Ivanka; Mikelic, Luka; Barisic, Delko; Matasin, Zeljka; Lulic, Stipe; Pezelj, Durdica

    2006-04-01

    Results of two years monitoring of heavy metals and arsenic concentrations in soft tissue of Mediterranean blue mussel Mytilus galloprovincialis are presented. Samples were taken at six localities (five exposed to various pollution sources and one control site) on the east coast of the Middle Adriatic in October 2003 and 2004 and in April 2004 and 2005. All measurements were carried out with source excited Energy Dispersive X-ray Fluorescence Method (EDXRF). Measured concentrations were in the following ranges: Pb (2-7 mg/kg); As (4-30 mg/kg); Cr (1-2.9 mg/kg); Mn (2-13 mg/kg); Fe (53.4-719 mg/kg); Ni (0.8-5 mg/kg); Cu (3.7-11.1 mg/kg) and Zn (59.1-273 mg/kg). Maximum values of the most elements were measured in samples from the most polluted Vranjic region. Statistically significant difference among six localities ( p = 0.05) was found for As, Fe and Zn while Mn, Fe and Cu showed significantly higher concentrations in spring period. None of the selected elements showed significant difference between the control and exposed regions.

  1. Biomonitoring of heavy metals and arsenic on the east coast of the Middle Adriatic Sea using Mytilus galloprovincialis

    Energy Technology Data Exchange (ETDEWEB)

    Orescanin, Visnja [Ruder Boskovic Institute, Laboratory for Radioecology, Bijenicka Cesta 54, 10 002 Zagreb (Croatia)]. E-mail: vobescan@irb.hr; Lovrencic, Ivanka [Ruder Boskovic Institute, Laboratory for Radioecology, Bijenicka Cesta 54, 10 002 Zagreb (Croatia); Mikelic, Luka [Ruder Boskovic Institute, Laboratory for Radioecology, Bijenicka Cesta 54, 10 002 Zagreb (Croatia); Barisic, Delko [Ruder Boskovic Institute, Laboratory for Radioecology, Bijenicka Cesta 54, 10 002 Zagreb (Croatia); Matasin, Zeljka [The Faculty of Veterinary Medicine, University of Zagreb, Heinzelova 55, 10 000 Zagreb (Croatia); Lulic, Stipe [Ruder Boskovic Institute, Laboratory for Radioecology, Bijenicka Cesta 54, 10 002 Zagreb (Croatia); Pezelj, Durdica [Department of Geology and Palaeontology, Faculty of Science, University of Zagreb, Zvonimirova 8, 10 000 Zagreb (Croatia)

    2006-04-15

    Results of two years monitoring of heavy metals and arsenic concentrations in soft tissue of Mediterranean blue mussel Mytilus galloprovincialis are presented. Samples were taken at six localities (five exposed to various pollution sources and one control site) on the east coast of the Middle Adriatic in October 2003 and 2004 and in April 2004 and 2005. All measurements were carried out with source excited Energy Dispersive X-ray Fluorescence Method (EDXRF). Measured concentrations were in the following ranges: Pb (2-7 mg/kg); As (4-30 mg/kg); Cr (1-2.9 mg/kg); Mn (2-13 mg/kg); Fe (53.4-719 mg/kg); Ni (0.8-5 mg/kg); Cu (3.7-11.1 mg/kg) and Zn (59.1-273 mg/kg). Maximum values of the most elements were measured in samples from the most polluted Vranjic region. Statistically significant difference among six localities (p = 0.05) was found for As, Fe and Zn while Mn, Fe and Cu showed significantly higher concentrations in spring period. None of the selected elements showed significant difference between the control and exposed regions.

  2. Biomonitoring of a polluted coastal area (Bay of Muggia, Northern Adriatic Sea): A five-year study using transplanted mussels.

    Science.gov (United States)

    Moschino, Vanessa; Del Negro, Paola; De Vittor, Cinzia; Da Ros, Luisa

    2016-06-01

    The subcellular effects of pollution were evaluated using two lysosomal biomarkers in mussels, Mytilus galloprovincialis, deployed periodically over a period of 5 years in a harbour area in the Bay of Muggia (Gulf of Trieste, North Adriatic Sea) that is strongly influenced by anthropogenic activities. Mussels were collected from a clean marine farm and analysed (sample T0). A sub-sample was transplanted to the harbour site (sample M) and analysed after about 12 weeks. An additional sub-sample was relocated within the farm as a control and was also tested at the end of the 12-week period (sample T1). The transplantation procedures were repeated twice yearly for 5 consecutive years, starting in 2009. Two well-established lysosomal biomarkers, i.e. lysosomal membrane stability and lipofuscin accumulation, were evaluated in hepatopancreas cells. The body condition index and mortality rate were also assessed. Moreover, various pollutants were determined in both mussel flesh, for a better comprehension of the biological response, and sediments, for a general characterization of the study area. As a whole, the applied biomarkers were found to be appropriate for determining the responses of mussels to environmental pollutant loads over time. Variations in lysosomal membrane stability and lipofuscin content were mostly related to total PAHs and metals respectively. Our results confirm the usefulness of active biomonitoring in evaluating pollution trends in marine coastal areas and in particular the value of lysosomal biomarkers as a rapid screening tool for highlighting pollutant effects at least at organism level.

  3. The onset of a severe summer bora episode near Oštarijska Vrata Pass in the Northern Adriatic

    Science.gov (United States)

    Trošić, Tanja

    2015-12-01

    A severe bora episode which lasted from 22 to 25 July 2012 has been selected for the 3D numerical model analysis of the start of the bora near the Oštarijska Pass in the Northern Adriatic of Croatia. The 10-m wind analysis shows that the gap flow turns and rotates in the central part of the Vir Sea at the start of bora. The MM5 model validation shows that the modelled wind matches well the automatic stations measurements and the validation of the vertical profiles shows that the model adequately captured the basic thermodynamic and flow structure during the bora episode. The vertical cross sections show the turning of the horizontal wind in the first 500-800 m over a relatively small area over the Vir Sea. The analysis implies that the wind turning can be attributed to the impact of the Etesian windflow, the frontal passage and the positions of the outer islands and coastal area. The analysis of the horizontal vorticity of the surface wind shows vorticity banners downwind of the gap with high vorticity values, up to 4 × 10-5 s-1, in the central part of the Vir Sea. A secondary northeastern vorticity maximum is developed due to the orography of the coastal area and the rotational windflow.

  4. Texture and composition of the Rosa Marina beach sands (Adriatic coast, southern Italy: a sedimentological/ecological approach

    Directory of Open Access Journals (Sweden)

    Moretti Massimo

    2016-06-01

    Full Text Available Beach sands from the Rosa Marina locality (Adriatic coast, southern Italy were analysed mainly microscopically in order to trace the source areas of their lithoclastic and bioclastic components. The main cropping out sedimentary units were also studied with the objective to identify the potential source areas of lithoclasts. This allowed to establish how the various rock units contribute to the formation of beach sands. The analysis of the bioclastic components allows to estimate the actual role of organisms regarding the supply of this material to the beach. Identification of taxa that are present in the beach sands as shell fragments or other remains was carried out at the genus or family level. Ecological investigation of the same beach and the recognition of sub-environments (mainly distinguished on the basis of the nature of the substrate and of the water depth was the key topic that allowed to establish the actual source areas of bioclasts in the Rosa Marina beach sands. The sedimentological analysis (including a physical study of the beach and the calculation of some statistical parameters concerning the grain-size curves shows that the Rosa Marina beach is nowadays subject to erosion.

  5. ASTROCHRONOLOGICAL CALIBRATION OF THE UPPER SERRAVALLIAN/LOWER TORTONIAN SEDIMENTARY SEQUENCE AT TREMITI ISLANDS(ADRIATIC SEA, SOUTHERN ITALY

    Directory of Open Access Journals (Sweden)

    FABRIZIO LIRER

    2002-07-01

    Full Text Available A high resolution cyclostratigraphic study was carried out on a cyclicaly bedded succession of late Middle Miocene deep marine deposits from the Tremiti Islands, Adriatic sea (Italy. Astronomical calibration of the sedimentary cycles provides absolute ages for different calcareous plankton bioevents, widely used for intra Mediterranean correlation, in the interval between 11.12 and 12.60 Ma. The sedimentary record of the S. nicola composite section consists of an alternation of indurated, withish coloured, CaCo3 rich and grey less indurated, CaCo3 poor marly beds, at times replaced by red coloured CaCo3 poor marls. Results of direct correlation between the La 90 (1,1 solution of the insolation curve and the cyclic lithologic patterns occurring in the studied sections, combined with results of spectral methodologies applied on the climate sensitive data (CaCo3 and Globigerinoides showed that the classic Milankovitch periodicity can be represented through the modulation forcing of the studied sedimentary records. 

  6. Application of surface analytical methods for hazardous situation in the Adriatic Sea: monitoring of organic matter dynamics and oil pollution

    Science.gov (United States)

    Pletikapić, Galja; Ivošević DeNardis, Nadica

    2017-01-01

    Surface analytical methods are applied to examine the environmental status of seawaters. The present overview emphasizes advantages of combining surface analytical methods, applied to a hazardous situation in the Adriatic Sea, such as monitoring of the first aggregation phases of dissolved organic matter in order to potentially predict the massive mucilage formation and testing of oil spill cleanup. Such an approach, based on fast and direct characterization of organic matter and its high-resolution visualization, sets a continuous-scale description of organic matter from micro- to nanometre scales. Electrochemical method of chronoamperometry at the dropping mercury electrode meets the requirements for monitoring purposes due to the simple and fast analysis of a large number of natural seawater samples enabling simultaneous differentiation of organic constituents. In contrast, atomic force microscopy allows direct visualization of biotic and abiotic particles and provides an insight into structural organization of marine organic matter at micro- and nanometre scales. In the future, merging data at different spatial scales, taking into account experimental input on micrometre scale, observations on metre scale and modelling on kilometre scale, will be important for developing sophisticated technological platforms for knowledge transfer, reports and maps applicable for the marine environmental protection and management of the coastal area, especially for tourism, fishery and cruiser trafficking.

  7. Assessing community assembly along a successional gradient in the North Adriatic Karst with functional and phylogenetic distances.

    Science.gov (United States)

    Batalha, Marco Antonio; Pipenbaher, Nataša; Bakan, Branko; Kaligarič, Mitja; Škornik, Sonja

    2015-08-01

    Recently, two approaches to account for ecological differences in community composition have been developed: one based on trait differences (functional diversity) and another based on evolutionary history (phylogenetic diversity). Combining them allows an integrated view of processes structuring communities. The North Adriatic Karst is covered by species-rich grasslands, but land abandonment has resulted in replacement by woodlands. This creates a successional gradient along which environmental conditions may change, and different community assembly rules may apply. We sampled 56 plant communities in the Karst and used functional-phylogenetic distances to assess assembly along a successional gradient, from grasslands to shrublands and woodlands. We found 146 species, for which we measured functional traits and built a phylogenetic tree. The three successional stages were floristically different, with grasslands having species that are typical of harsher soil conditions and woodlands with species preferring milder soil conditions. All communities had higher functional than phylogenetic distances, implying that closely related species tended to be phenotypically dissimilar. When more importance was given to functional distances, most grasslands and some shrublands were underdispersed; when more importance was given to phylogenetic distances, only one grassland was underdispersed and one woodland was overdispersed. Combining functional and phylogenetic distances provided us with better estimates of ecological differences in a successional gradient, where environmental filters seem to be the dominant force in early stages and competitive exclusion becomes more important in later stages. Taking into account that sucessional stages are assembled by different rules is essential to predicting their behaviour under future environmental scenarios.

  8. Effect of temporal and geographical factors on fatty acid composition of M. galloprovincialis from the Adriatic sea.

    Science.gov (United States)

    Ventrella, Vittoria; Pirini, Maurizio; Pagliarani, Alessandra; Trombetti, Fabiana; Manuzzi, Maria Pia; Borgatti, Anna Rosa

    2008-02-01

    Soft body tissue and gill and mantle microsomal membranes of Mytilus galloprovincialis, were analyzed to assess geographical and temporal effects on fatty acid distribution with special focus on n-3 polyunsaturated fatty acid (PUFA) content. Mussels and plankton samples were collected in April and in October from three locations of the North Adriatic Sea. Plankton fatty acid composition apparently depended both on the sampling site and time and differences referable to temporal features prevailed on the geographical ones. Accordingly, also mussel fatty acid composition appeared to be more effectively modulated by sampling time rather than by sampling location. Membrane fatty acids showed high homeostatic capabilities to reduce effects of exogenous input on cellular organization. Selective capabilities apparently enable mussels to modulate their fatty acid composition combining plankton input, environmental effects on lipid metabolism and physiological requirements. The constantly higher n-3/n-6 ratio in April than in October, shared by fatty acids of plankton, soft tissues and microsomal membranes, confirms the influence of temporal factors in fatty acid modulation. On these bases, late spring is suggested to be the more suitable period for collecting mussels destined for healthy diet of humans or other animals.

  9. The reproductive cycle, size at maturity and fecundity of garfish ( Belone belone, L. 1761) in the eastern Adriatic Sea

    Science.gov (United States)

    Zorica, B.; Sinovčić, G.; Keč, V. Čikeš

    2011-12-01

    A recent study concerning the reproductive biology of the garfish ( Belone belone, L. 1761) has been carried out in the eastern part of the Adriatic Sea along the Croatian coastline. Specimens of the fish ( N = 3,393) were collected over a 6-year period (2003-2008). Their length varied between 20.8 and 75.4 cm (mean ± SD = 38.3 ± 7.94). Female garfish were dominant in larger length groups being most apparent during the resting phase of sexual cycle and in the peak of the spawning period, occurring in April and May. The sexual ratio of all specimens was m/f = 0.98. Males were prevalent in March—at the beginning of the highest spawning activities. Fifty percentage of the garfish population sexually matured at 28.5 cm of total length. Males and females reached their sexual maturity at 28.0 and 31.5 cm of total length, respectively. Spawning began in January peaking during March to May. According to their maturity stages, gonad weight and the gonadosomatic index, males began to spawn one month earlier (April) than females (May). The mean batch fecundity of garfish was 1,242.46 ± 843.64 of matured oocytes per ovary. Matured oocyte diameters ranged from 1.223 to 4.283 mm with the mean value of 2.269 ± 0.332 mm.

  10. Diversity and localization of bacterial symbionts in three whitefly species (Hemiptera: Aleyrodidae) from the east coast of the Adriatic Sea.

    Science.gov (United States)

    Skaljac, M; Zanić, K; Hrnčić, S; Radonjić, S; Perović, T; Ghanim, M

    2013-02-01

    Several whitefly species (Hemiptera: Aleyrodidae) are cosmopolitan phloem-feeders that cause serious damage in numerous agricultural crops. All whitefly species harbor a primary bacterial symbiont and a diverse array of secondary symbionts which may influence several aspects of the insect's biology. We surveyed infections by secondary symbionts in Bemisia tabaci (Gennadius), Trialeurodes vaporariorum (Westwood) and Siphoninus phillyreae (Haliday) from areas in the east cost of the Adriatic Sea. Both the Middle East-Asia Minor 1 (MEAM1) and Mediterranean (MED) B. tabaci genetic groups were detected in Montenegro, whereas only the MED was confirmed in Croatia. Trialeurodes vaporariorum and S. phillyreae were found in all areas surveyed. MEAM1 and MED exhibited similarity to previously reported infections, while populations of T. vaporariorum from Montenegro harbored Rickettsia, Wolbachia and Cardinium in addition to previously reported Hamiltonella and Arsenopnohus. Siphoninus phillyreae harbored Hamiltonella, Wolbachia, Cardinium and Arsenophonus, with the latter appearing in two alleles. Multiple infections of all symbionts were common in the three insect species tested, with some reaching near fixation. Florescent in situ hybridization showed new localization patterns for Hamiltonella in S. phillyreae, and the morphology of the bacteriosome differed from that observed in other whitefly species. Our results show new infections with bacterial symbionts in the whitefly species studied. Infections with the same symbionts in reproductively isolated whitefly species confirm complex relationships between whiteflies and bacterial symbionts, and suggest possible horizontal transfer of some of these bacteria.

  11. Center for Contaminated Sediments

    Data.gov (United States)

    Federal Laboratory Consortium — The U.S. Army Corps of Engineers Center for Contaminated Sediments serves as a clearinghouse for technology and expertise concerned with contaminated sediments. The...

  12. Contaminated Sites in Iowa

    Data.gov (United States)

    Iowa State University GIS Support and Research Facility — Sites contaminated by hazardous materials or wastes. These sites are those administered by the Contaminated Sites Section of Iowa DNR. Many are sites which are...

  13. Patterns of benthic bacterial diversity in coastal areas contaminated by heavy metals, Polycyclic Aromatic Hydrocarbons (PAHs and Polychlorinated Biphenyls (PCBs

    Directory of Open Access Journals (Sweden)

    Grazia Marina eQuero

    2015-10-01

    Full Text Available Prokaryotes in coastal sediments are fundamental players in the ecosystem functioning and regulate processes relevant in the global biogeochemical cycles. Nevertheless, knowledge on benthic microbial diversity patterns across spatial scales, or as function to anthropogenic influence, is still limited. We investigated the microbial diversity in two of the most chemically polluted sites along the coast of Italy. One site is the Po River Prodelta (Northern Adriatic Sea, which receives contaminant discharge from one of the largest rivers in Europe. The other site, the Mar Piccolo of Taranto (Ionian Sea, is a chronically-polluted area due to steel production plants, oil refineries, and intense maritime traffic. We collected sediments from 30 stations along gradients of contamination, and studied prokaryotic diversity using Illumina sequencing of amplicons of a 16S rDNA gene fragment. The main sediment variables and the concentration of eleven metals, PCBs and PAHs were measured. Chemical analyses confirmed the high contamination in both sites, with concentrations of PCBs particularly high and often exceeding the sediment guidelines. The analysis of more than 3 millions 16S rDNA sequences showed that richness decreased with higher contamination levels. Multivariate analyses showed that contaminants significantly shaped community composition. Assemblages differed significantly between the two sites, but showed wide within-site variations related with spatial gradients in the chemical contamination, and the presence of a core set of OTUs shared by the two geographically distant sites. A larger importance of PCB-degrading taxa was observed in the Mar Piccolo, suggesting their potential selection in this historically-polluted site. Our results indicate that sediment contamination by multiple contaminants significantly alter benthic prokaryotic diversity in coastal areas, and suggests considering the potential contribution of the resident microbes to

  14. Dietary patterns, n-3 fatty acids intake from seafood and high levels of anxiety symptoms during pregnancy: findings from the Avon Longitudinal Study of Parents and Children.

    Directory of Open Access Journals (Sweden)

    Juliana dos Santos Vaz

    Full Text Available Little is known about relationships between dietary patterns, n-3 polyunsaturated fatty acids (PUFA intake and excessive anxiety during pregnancy.To examine whether dietary patterns and n-3 PUFA intake from seafood are associated with high levels of anxiety during pregnancy.Pregnant women enrolled from 1991-1992 in ALSPAC (n 9,530. Dietary patterns were established from a food frequency questionnaire using principal component analysis. Total intake of n-3 PUFA (grams/week from seafood was also examined. Symptoms of anxiety were measured at 32 weeks of gestation with the Crown-Crisp Experiential Index; scores ≥ 9 corresponding to the 85(th percentile was defined as high anxiety symptoms. Multivariate logistic regression models were used to estimate the OR and 95% CI, adjusted by socioeconomic and lifestyle variables.Multivariate results showed that women in the highest tertile of the health-conscious (OR 0.77; 0.65-0.93 and the traditional (OR 0.84; 0.73-0.97 pattern scores were less likely to report high levels of anxiety symptoms. Women in the highest tertile of the vegetarian pattern score (OR 1.25; 1.08-1.44 were more likely to have high levels of anxiety, as well as those with no n-3 PUFA intake from seafood (OR 1.53; 1.25-1.87 when compared with those with intake of >1.5 grams/week.The present study provides evidence of a relationship between dietary patterns, fish intake or n-3 PUFA intake from seafood and symptoms of anxiety in pregnancy, and suggests that dietary interventions could be used to reduce high anxiety symptoms during pregnancy.

  15. Isolation and molecular identification of Vibrio spp. by sequencing of 16S rDNA from seafood, meat and meat products in Libya.

    Science.gov (United States)

    Azwai, S M; Alfallani, E A; Abolghait, S K; Garbaj, A M; Naas, H T; Moawad, A A; Gammoudi, F T; Rayes, H M; Barbieri, I; Eldaghayes, I M

    2016-01-01

    The genus Vibrio includes several food-borne pathogens that cause a spectrum of clinical conditions including septicemia, cholera and milder forms of gastroenteritis. Several Vibrio spp. are commonly associated with food-borne transmission including Vibrio cholerae, Vibrio parahemolyticus, and Vibrio vulnificus. Microbiologic