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Sample records for atlantic bluefin tuna

  1. Impending collapse of bluefin tuna in the northeast Atlantic and Mediterranean

    DEFF Research Database (Denmark)

    MacKenzie, Brian; Mosegaard, Henrik; Rosenberg, Andrew A.

    2009-01-01

    The abundance of bluefin tuna, Thunnus thynnus, in the east Atlantic and Mediterranean has declined in recent decades. The International Commission for the Conservation of Atlantic Tunas (ICCAT), the regional bluefin tuna management authority, has developed a plan to promote recovery by 2022, while...

  2. Trophic impact of Atlantic bluefin tuna migrations in the North Sea

    DEFF Research Database (Denmark)

    Mariani, Patrizio; Andersen, Ken Haste; Lindegren, Martin

    2017-01-01

    and the stability of the fish community. The impact of a migrating top-predator is investigated here for Atlantic bluefin tuna in the North Sea. Bluefin tuna has been absent from the region for half-century, but recent years have seen recovery of migrations and a return of bluefin tuna in the area. We use a size...... spectrum model to analyse the trophic impact of the returning tuna on the entire fish community, under scenarios with varying levels of tuna consumption and fishing mortality on the prey. We show that with high level of prey fishing mortality in the North Sea, the effect of a tuna re-colonization results...... in only limited trophic cascades. However, high tuna consumption or changes in fishing mortality may result in a sudden recruitment failure of small-pelagic fish due to cascading effects on the fish community. In present-day conditions, the level of tuna consumption that triggers recruitment failure...

  3. 75 FR 30732 - Atlantic Highly Migratory Species; 2010 Atlantic Bluefin Tuna Quota Specifications

    Science.gov (United States)

    2010-06-02

    ... Species (HMS) Management Division, Office of Sustainable Fisheries (F/SF1), NMFS, 55 Great Republic Drive... Atlantic bluefin tuna stock (ICCAT Recommendation 08-04), i.e., 50 percent of the U.S. quota, or 488.7 mt... landings is now available, and it indicates a total 2009 underharvest of 388.6 mt. Thus, in this final...

  4. The development of the northern European fishery for north Atlantic bluefin tuna Thunnus thynnus during 1900-1950

    DEFF Research Database (Denmark)

    MacKenzie, Brian; Myers, R.A.

    2007-01-01

    North Atlantic bluefin tuna, Thunnus thynnus, used to migrate to northern European waters (Norwegian Sea, North Sea, Skagerrak, Kattegat, and Øresund) where it supported important commercial and sportfisheries. The species disappeared from the region in the early 1960s and the species is now still...... increasing. The species was frequently sighted while fishermen were targeting other species (herring, mackerel) and occasionally was caught as bycatch with these and other species. Information from scientifically trained observers demonstrate that tuna schools were common in the North Sea for 2–3 months...... and the capacity of processing facilities for bluefin tuna. Bluefin tuna in this area were generally medium-large (>50 kg whole weight). The most important countries which participated in bluefin tuna fisheries in this period were Norway, Denmark and Sweden, but bluefin tuna were also exploited by France, Germany...

  5. Electronic tagging of Atlantic bluefin tuna (Thunnus thynnus, L.) reveals habitat use and behaviors in the Mediterranean Sea.

    Science.gov (United States)

    Cermeño, Pablo; Quílez-Badia, Gemma; Ospina-Alvarez, Andrés; Sainz-Trápaga, Susana; Boustany, Andre M; Seitz, Andy C; Tudela, Sergi; Block, Barbara A

    2015-01-01

    We analyzed the movements of Atlantic tuna (Thunnus thynnus L.) in the Mediterranean Sea using data from 2 archival tags and 37 pop-up satellite archival tags (PAT). Bluefin tuna ranging in size from 12 to 248 kg were tagged on board recreational boats in the western Mediterranean and the Adriatic Sea between May and September during two different periods (2000 to 2001 and 2008 to 2012). Although tuna migrations between the Mediterranean Sea and the Atlantic Ocean have been well reported, our results indicate that part of the bluefin tuna population remains in the Mediterranean basin for much of the year, revealing a more complex population structure. In this study we demonstrate links between the western Mediterranean, the Adriatic and the Gulf of Sidra (Libya) using over 4336 recorded days of location and behavior data from tagged bluefin tuna with a maximum track length of 394 days. We described the oceanographic preferences and horizontal behaviors during the spawning season for 4 adult bluefin tuna. We also analyzed the time series data that reveals the vertical behavior of one pop-up satellite tag recovered, which was attached to a 43.9 kg tuna. This fish displayed a unique diving pattern within 16 days of the spawning season, suggesting a use of the thermocline as a thermoregulatory mechanism compatible with spawning. The results obtained hereby confirm that the Mediterranean is clearly an important habitat for this species, not only as spawning ground, but also as an overwintering foraging ground.

  6. Electronic tagging of Atlantic bluefin tuna (Thunnus thynnus, L. reveals habitat use and behaviors in the Mediterranean Sea.

    Directory of Open Access Journals (Sweden)

    Pablo Cermeño

    Full Text Available We analyzed the movements of Atlantic tuna (Thunnus thynnus L. in the Mediterranean Sea using data from 2 archival tags and 37 pop-up satellite archival tags (PAT. Bluefin tuna ranging in size from 12 to 248 kg were tagged on board recreational boats in the western Mediterranean and the Adriatic Sea between May and September during two different periods (2000 to 2001 and 2008 to 2012. Although tuna migrations between the Mediterranean Sea and the Atlantic Ocean have been well reported, our results indicate that part of the bluefin tuna population remains in the Mediterranean basin for much of the year, revealing a more complex population structure. In this study we demonstrate links between the western Mediterranean, the Adriatic and the Gulf of Sidra (Libya using over 4336 recorded days of location and behavior data from tagged bluefin tuna with a maximum track length of 394 days. We described the oceanographic preferences and horizontal behaviors during the spawning season for 4 adult bluefin tuna. We also analyzed the time series data that reveals the vertical behavior of one pop-up satellite tag recovered, which was attached to a 43.9 kg tuna. This fish displayed a unique diving pattern within 16 days of the spawning season, suggesting a use of the thermocline as a thermoregulatory mechanism compatible with spawning. The results obtained hereby confirm that the Mediterranean is clearly an important habitat for this species, not only as spawning ground, but also as an overwintering foraging ground.

  7. Dispersal routes and habitat utilization of juvenile Atlantic bluefin tuna, Thunnus thynnus, tracked with mini PSAT and archival tags.

    Directory of Open Access Journals (Sweden)

    Benjamin Galuardi

    Full Text Available Between 2005 and 2009, we deployed 58 miniature pop-up satellite archival tags (PSAT and 132 implanted archival tags on juvenile Atlantic bluefin tuna (age 2-5 in the northwest Atlantic Ocean. Data returned from these efforts (n = 26 PSATs, 1 archival tag revealed their dispersal routes, horizontal and vertical movements and habitat utilization. All of the tagged bluefin tuna remained in the northwest Atlantic for the duration observed, and in summer months exhibited core-use of coastal seas extending from Maryland to Cape Cod, MA, (USA out to the shelf break. Their winter distributions were more spatially disaggregated, ranging south to the South Atlantic Bight, northern Bahamas and Gulf Stream. Vertical habitat patterns showed that juvenile bluefin tuna mainly occupied shallow depths (mean= 5-12 m, sd = 15-23.7 m and relatively warm water masses in summer (mean= 17.9-20.9°C, sd= 4.2-2.6°C and had deeper and more variable depth patterns in winter (mean= 41-58 m, sd= 48.9-62.2 m. Our tagging results reveal annual dispersal patterns, behavior and oceanographic associations of juvenile Atlantic bluefin tuna that were only surmised in earlier studies. Fishery independent profiling from electronic tagging also provide spatially and temporally explicit information for evaluating dispersals rates, population structure and fisheries catch patterns.

  8. Dispersal routes and habitat utilization of juvenile Atlantic bluefin tuna, Thunnus thynnus, tracked with mini PSAT and archival tags.

    Science.gov (United States)

    Galuardi, Benjamin; Lutcavage, Molly

    2012-01-01

    Between 2005 and 2009, we deployed 58 miniature pop-up satellite archival tags (PSAT) and 132 implanted archival tags on juvenile Atlantic bluefin tuna (age 2-5) in the northwest Atlantic Ocean. Data returned from these efforts (n = 26 PSATs, 1 archival tag) revealed their dispersal routes, horizontal and vertical movements and habitat utilization. All of the tagged bluefin tuna remained in the northwest Atlantic for the duration observed, and in summer months exhibited core-use of coastal seas extending from Maryland to Cape Cod, MA, (USA) out to the shelf break. Their winter distributions were more spatially disaggregated, ranging south to the South Atlantic Bight, northern Bahamas and Gulf Stream. Vertical habitat patterns showed that juvenile bluefin tuna mainly occupied shallow depths (mean= 5-12 m, sd = 15-23.7 m) and relatively warm water masses in summer (mean= 17.9-20.9°C, sd= 4.2-2.6°C) and had deeper and more variable depth patterns in winter (mean= 41-58 m, sd= 48.9-62.2 m). Our tagging results reveal annual dispersal patterns, behavior and oceanographic associations of juvenile Atlantic bluefin tuna that were only surmised in earlier studies. Fishery independent profiling from electronic tagging also provide spatially and temporally explicit information for evaluating dispersals rates, population structure and fisheries catch patterns.

  9. Atlantic bluefin tuna: a novel multistock spatial model for assessing population biomass.

    Directory of Open Access Journals (Sweden)

    Nathan G Taylor

    Full Text Available Atlantic bluefin tuna (Thunnus thynnus is considered to be overfished, but the status of its populations has been debated, partly because of uncertainties regarding the effects of mixing on fishing grounds. A better understanding of spatial structure and mixing may help fisheries managers to successfully rebuild populations to sustainable levels while maximizing catches. We formulate a new seasonally and spatially explicit fisheries model that is fitted to conventional and electronic tag data, historic catch-at-age reconstructions, and otolith microchemistry stock-composition data to improve the capacity to assess past, current, and future population sizes of Atlantic bluefin tuna. We apply the model to estimate spatial and temporal mixing of the eastern (Mediterranean and western (Gulf of Mexico populations, and to reconstruct abundances from 1950 to 2008. We show that western and eastern populations have been reduced to 17% and 33%, respectively, of 1950 spawning stock biomass levels. Overfishing to below the biomass that produces maximum sustainable yield occurred in the 1960s and the late 1990s for western and eastern populations, respectively. The model predicts that mixing depends on season, ontogeny, and location, and is highest in the western Atlantic. Assuming that future catches are zero, western and eastern populations are predicted to recover to levels at maximum sustainable yield by 2025 and 2015, respectively. However, the western population will not recover with catches of 1750 and 12,900 tonnes (the "rebuilding quotas" in the western and eastern Atlantic, respectively, with or without closures in the Gulf of Mexico. If future catches are double the rebuilding quotas, then rebuilding of both populations will be compromised. If fishing were to continue in the eastern Atlantic at the unregulated levels of 2007, both stocks would continue to decline. Since populations mix on North Atlantic foraging grounds, successful rebuilding

  10. Seasonal movements, aggregations and diving behavior of Atlantic bluefin tuna (Thunnus thynnus) revealed with archival tags

    National Research Council Canada - National Science Library

    Walli, Andreas; Teo, Steven L H; Boustany, Andre; Farwell, Charles J; Williams, Tom; Dewar, Heidi; Prince, Eric; Block, Barbara A

    2009-01-01

    ...) were deployed in bluefin tuna from 1996 to 2005 and 106 tags were recovered. Movement paths of the fish were reconstructed using light level and sea-surface-temperature-based geolocation estimates...

  11. A Satellite Imagery, Ecosystem-Based GIS Study of Bluefin Tuna and Right Whale Distribution and Movements in the Gulf of Marine and NW Atlantic

    National Research Council Canada - National Science Library

    Lutcavage, Molly

    2002-01-01

    The goals of this research were to develop a GIS workstation to examine the distribution, relative abundance, and behavior of Atlantic bluefin tuna and the Northern right whale in relation to their environment and prey...

  12. Management actions and initiatives for bluefin tuna over the past ...

    African Journals Online (AJOL)

    spamer

    Management actions and initiatives for bluefin tuna over the past decade have been the subject of consid- erable controversy. Debate has centred particularly on stocks of the north Atlantic Thunnus thynnus, especially in the western North Atlantic, and of the southern hemi- sphere (southern bluefin tuna [SBT] Thunnus mac-.

  13. Habitat suitability of the Atlantic bluefin tuna by size class: An ecological niche approach

    Science.gov (United States)

    Druon, Jean-Noël; Fromentin, Jean-Marc; Hanke, Alex R.; Arrizabalaga, Haritz; Damalas, Dimitrios; Tičina, Vjekoslav; Quílez-Badia, Gemma; Ramirez, Karina; Arregui, Igor; Tserpes, George; Reglero, Patricia; Deflorio, Michele; Oray, Isik; Saadet Karakulak, F.; Megalofonou, Persefoni; Ceyhan, Tevfik; Grubišić, Leon; MacKenzie, Brian R.; Lamkin, John; Afonso, Pedro; Addis, Piero

    2016-03-01

    An ecological niche modelling (ENM) approach was used to predict the potential feeding and spawning habitats of small (5-25 kg, only feeding) and large (>25 kg) Atlantic bluefin tuna (ABFT), Thunnus thynnus, in the Mediterranean Sea, the North Atlantic and the Gulf of Mexico. The ENM was built bridging knowledge on ecological traits of ABFT (e.g. temperature tolerance, mobility, feeding and spawning strategy) with patterns of selected environmental variables (chlorophyll-a fronts and concentration, sea surface current and temperature, sea surface height anomaly) that were identified using an extensive set of precisely geo-located presence data. The results highlight a wider temperature tolerance for larger fish allowing them to feed in the northern - high chlorophyll levels - latitudes up to the Norwegian Sea in the eastern Atlantic and to the Gulf of Saint Lawrence in the western basin. Permanent suitable feeding habitat for small ABFT was predicted to be mostly located in temperate latitudes in the North Atlantic and in the Mediterranean Sea, as well as in subtropical waters off north-west Africa, while summer potential habitat in the Gulf of Mexico was found to be unsuitable for both small and large ABFTs. Potential spawning grounds were found to occur in the Gulf of Mexico from March-April in the south-east to April-May in the north, while favourable conditions evolve in the Mediterranean Sea from mid-May in the eastern to mid-July in the western basin. Other secondary potential spawning grounds not supported by observations were predicted in the Azores area and off Morocco to Senegal during July and August when extrapolating the model settings from the Gulf of Mexico into the North Atlantic. The presence of large ABFT off Florida and the Bahamas in spring was not explained by the model as is, however the environmental variables other than the sea surface height anomaly appeared to be favourable for spawning in part of this area. Defining key spatial and

  14. Into the deep blue sea: Commons theory and international governance of Atlantic Bluefin Tuna

    Directory of Open Access Journals (Sweden)

    Graham Epstein

    2014-08-01

    Full Text Available The need to understand how to sustainably govern oceanic fisheries has become increasingly urgent as their contribution to global food security and livelihoods are threatened by declining stocks. Atlantic Bluefin Tuna (ABFT is a prominent example of the complexities associated with widely distributed oceanic resources, extending in this case to include much of the North-Atlantic and Mediterranean Sea. This distribution has led to limited attention from commons theorists that tend to focus on small-scale social ecological systems. Therefore in order to explore the fit between theories of the commons developed in small-scale systems, we apply the Social-Ecological Systems Meta-Analysis Database (SESMAD to systematically analyze ABFT governance over a 22 year period. The results, which focus on the effects of resource characteristics, broadly correspond to the expectations of commons theory. Interestingly, however, the addition of resource storage in the form of ABFT ranches appears to be contributing to unsustainable harvests. This stands in contrast to previous findings in the commons literature that storage tends to enhance prospects for sustainable governance. Therefore several alternative hypotheses are developed by comparing and contrasting attributes of ABFT and canal irrigation storage. These hypotheses may be used in future research to evaluate the conditions in which storage enhances prospects for sustainable governance.

  15. Depressed resilience of bluefin tuna in the western atlantic and age truncation.

    Science.gov (United States)

    Secor, D H; Rooker, J R; Gahagan, B I; Siskey, M R; Wingate, R W

    2015-04-01

    Following intense overfishing in the 1970s, the western stock of Atlantic bluefin tuna (Thunnus thynnus) experienced a long period of depressed abundance, which has been attributed to failure of the population to periodically produce large numbers of juveniles, the western stock mixing with the more highly exploited eastern stock (fisheries in the Northeast Atlantic Ocean and Mediterranean Sea), and regime shift in the population's ecosystem resulting in lower replacement rates. To evaluate the presence of relatively strong years of juvenile production, we analyzed age structure from a recent sample of otoliths (ear stones) collected from the western stock (2011-2013, North Carolina, U.S.A., winter fishery). Mixing levels for the recent sample were analyzed using otolith stable isotopes to test whether age structure might be biased through immigration of eastern stock bluefin tuna. Age structure from historical samples collected from United States and Canadian fisheries (1975-1981) was compared with more recent samples (1996-2007) to examine whether demographic changes had occurred to the western stock that might have disrupted juvenile production. Relatively high juvenile production occurred in 2003, 2005, and 2006. Otolith stable isotope analysis showed that these recruitments were mostly of western stock origin. However, these high recruitments were >2-fold less than historical recruitment. We found substantial age truncation in the sampled fisheries. Half the historical sample was >20 years old (mean age = 20.1 [SD 3.7]; skewness = -0.3), whereas 20 years old (mean age = 13.4 [SD 3.8]; skewness = 1.3). Loss of age structure is consistent with changes in fishing selectivity and trends in the stock assessment used for management. We propose that fishing, as a forcing variable, brought about a threshold shift in the western stock toward lower biomass and production, a shift that emulates the regime shift hypothesis. An abbreviated reproductive life span

  16. Dietary evidence of mesopelagic and pelagic foraging by Atlantic bluefin tuna (Thunnus thynnus L.) during autumn migrations to the Iceland Basin

    DEFF Research Database (Denmark)

    Olafsdottir, Droplaug; MacKenzie, Brian; Chosson-P, Valérie

    2016-01-01

    Atlantic bluefin tuna (ABFT; Thunnus thynnus) is a large highly mobile predator fish species in the North Atlantic Ocean and Mediterranean Sea. Knowledge of its trophic role in marine food webs in summer feeding areas is presently based on recent (1980–2010s) sampling in the Bay of Biscay, Gulfs...

  17. Microarray gene expression profiles from mature gonad tissues of Atlantic bluefin tuna, Thunnus thynnus in the Gulf of Mexico

    Directory of Open Access Journals (Sweden)

    Gardner Luke D

    2012-10-01

    Full Text Available Abstract Background Bluefin tunas are highly prized pelagic fish species representing a significant economic resource to fisheries throughout the world. Atlantic bluefin tuna (Thunnus thynnus populations have significantly declined due to overexploitation. As a consequence of their value and population decline, T. thynnus has been the focus of considerable research effort concerning many aspects of their life history. However, in-depth understanding of T. thynnus reproductive biology is still lacking. Knowledge of reproductive physiology is a very important tool for determining effective fisheries and aquaculture management. Transcriptome techniques are proving powerful and provide novel insights into physiological processes. Construction of a microarray from T. thynnus ESTs sourced from reproductive tissues has provided an ideal platform to study the reproductive physiology of bluefin tunas. The aim of this investigation was to compare transcription profiles from the ovaries and testes of mature T. thynnus to establish sex specific variations underlying their reproductive physiology. Results Male and females T. thynnus gonad tissues were collected from the wild and histologically staged. Sub-samples of sexually mature tissues were also measured for their mRNA differential expression among the sexes using the custom microarray design BFT 4X44K. A total of 7068 ESTs were assessed for differential expression of which 1273 ESTs were significantly different (p2 fold change in expression according to sex. Differential expression for 13 of these ESTs was validated with quantitative PCR. These include genes involved in egg envelope formation, hydration, and lipid transport/accumulation more highly expressed in ovaries compared with testis, while genes involved in meiosis, sperm motility and lipid metabolism were more highly expressed in testis compared with ovaries. Conclusions This investigation has furthered our knowledge of bluefin tunas

  18. Comparative phylogeography of Atlantic bluefin tuna and swordfish: the combined effects of vicariance, secondary contact, introgression, and population expansion on the regional phylogenies of two highly migratory pelagic fishes.

    Science.gov (United States)

    Alvarado Bremer, Jaime R; Viñas, Jordi; Mejuto, Jaime; Ely, Bert; Pla, Carles

    2005-07-01

    Comparative phylogeography has revealed remarkable patterns of concordance in the maternal phylogenies of many species. The phylogeography and historical demography of the mitochondrial control region I for 607 Atlantic bluefin tuna (Thunnus thynnus) and 275 swordfish (Xiphias gladius) were analyzed to clarify the complex phylogenetic signals in the North Atlantic-Mediterranean region where they are sympatric. Atlantic bluefin tuna mtDNA is polyphyletic, and includes rare sequences sister to Pacific bluefin tuna (Thunnus orientalis) and introgressed albacore (Thunnus alalunga) sequences. There is no geographic partitioning between Atlantic and Mediterranean samples of Atlantic bluefin tuna (Phi(ST)=0.002). In contrast, Atlantic and Mediterranean swordfish are differentiated (Phi(ST)=0.091) due to the combined effects of vicariance, secondary contact, and dissimilar regional demographic histories. Mediterranean swordfish has substantially less variation, and a more recent history (tau=2.42) than that of Atlantic swordfish (tau=7.02). In spite of the discordant phylogenetic and phylogeographic signals, the demographic history of Atlantic swordfish and Atlantic bluefin tuna (tau=7.51) suggests concordance in the timeline of population expansion. Possible scenarios of cladogenesis, expansion, and contraction, influenced by glacial cycles during the Pleistocene, are formulated.

  19. Development of a robust index of abundance for Atlantic bluefin tuna (Thunnus thynnus) through aerial surveys in the Northwestern Mediterranean Sea

    OpenAIRE

    Robert Klaus, Bauer

    2015-01-01

    Declines in Atlantic bluefin tuna stocks (ABFT, Thunnus thynnus), due to extensive over-fishing, have been widely publicized in recent decades. To counteract this trend, regulatory measures have been introduced by the fisheries managers, aiming at the rebuilding of ABFT stocks. However, apart from difficulties in controlling the implementation of these measures, fisheries management is limited in its capabilities to track their efficiency due to major uncertainties in the stock assessment. In...

  20. Organic waste impact of capture-based Atlantic bluefin tuna aquaculture at an exposed site in the Mediterranean Sea

    Science.gov (United States)

    Vezzulli, Luigi; Moreno, Mariapaola; Marin, Valentina; Pezzati, Elisabetta; Bartoli, Marco; Fabiano, Mauro

    2008-06-01

    A variety of pelagic and benthic parameters were measured at an aquaculture farm used for the fattening of Atlantic bluefin tuna ( Thunnus thynnus) which is located at an exposed site (700 m from the coast, average bottom depth of 45 m and average current speed of 6 cm s -1) in the Mediterranean Sea. The objective was to test whether modern off-shore tuna fattening industries can exert a sustainable organic waste impact on the receiving environment as has been reported for the offshore culture of more traditional Mediterranean species such as sparids. In the water column, the concentration of phytopigments, organic matter, heterotrophic bacteria and the taxonomic abundance of mesozooplankton (at the species level) were assessed. In the sediment, we assessed the concentration of reduced sulphur pools, phytopigments, organic matter, heterotrophic bacteria and the taxonomic abundance of meiofauna (at the taxa level) and nematodes (at the genus level). For most parameters, we found no substantial differences between farm and control sites. Deviations of farm values from control values, when they occurred, were small and did not indicate any significant impact on either the pelagic and benthic environment. Deviations were more apparent in the benthic compartment where lower redox potential values, higher bacterial production rates and a change in nematode genus composition pointed out to early changes in the sediment's metabolism. In addition, indigenous potential pathogenic bacteria showed higher concentration at the fish farm stations and were a warning of an undesirable event that may become established following aquaculture practice in oligotrophic environments. The overall data from this study provide extensive experimental evidence to support the sustainability of modern offshore farming technology in minimizing the hypertrophic-dystrophic risks associated with the rapidly-expanding tuna-fattening industry in the Mediterranean Sea.

  1. Co-Occurrence and Habitat Use of Fin Whales, Striped Dolphins and Atlantic Bluefin Tuna in the Northwestern Mediterranean Sea.

    Science.gov (United States)

    Bauer, Robert Klaus; Fromentin, Jean-Marc; Demarcq, Hervé; Brisset, Blandine; Bonhommeau, Sylvain

    2015-01-01

    Different dolphin and tuna species have frequently been reported to aggregate in areas of high frontal activity, sometimes developing close multi-species associations to increase feeding success. Aerial surveys are a common tool to monitor the density and abundance of marine mammals, and have recently become a focus in the search for methods to provide fisheries-independent abundance indicators for tuna stock assessment. In this study, we present first density estimates corrected for availability bias of fin whales (Balaenoptera physalus) and striped dolphins (Stenella coeruleoalba) from the Golf of Lions (GoL), compared with uncorrected estimates of Atlantic bluefin tuna (ABFT; Thunnus thynnus) densities from 8 years of line transect aerial surveys. The raw sighting data were further used to analyze patterns of spatial co-occurrence and density of these three top marine predators in this important feeding ground in the Northwestern Mediterranean Sea. These patterns were investigated regarding known species-specific feeding preferences and environmental characteristics (i. e. mesoscale activity) of the survey zone. ABFT was by far the most abundant species during the surveys in terms of schools and individuals, followed by striped dolphins and fin whales. However, when accounted for availability bias, schools of dolphins and fin whales were of equal density. Direct interactions of the species appeared to be the exception, but results indicate that densities, presence and core sighting locations of striped dolphins and ABFT were correlated. Core sighting areas of these species were located close to an area of high mesoscale activity (oceanic fronts and eddies). Fin whales did not show such a correlation. The results further highlight the feasibility to coordinate research efforts to explore the behaviour and abundance of the investigated species, as demanded by the Marine Strategy Framework Directive (MSFD).

  2. Co-Occurrence and Habitat Use of Fin Whales, Striped Dolphins and Atlantic Bluefin Tuna in the Northwestern Mediterranean Sea.

    Directory of Open Access Journals (Sweden)

    Robert Klaus Bauer

    Full Text Available Different dolphin and tuna species have frequently been reported to aggregate in areas of high frontal activity, sometimes developing close multi-species associations to increase feeding success. Aerial surveys are a common tool to monitor the density and abundance of marine mammals, and have recently become a focus in the search for methods to provide fisheries-independent abundance indicators for tuna stock assessment. In this study, we present first density estimates corrected for availability bias of fin whales (Balaenoptera physalus and striped dolphins (Stenella coeruleoalba from the Golf of Lions (GoL, compared with uncorrected estimates of Atlantic bluefin tuna (ABFT; Thunnus thynnus densities from 8 years of line transect aerial surveys. The raw sighting data were further used to analyze patterns of spatial co-occurrence and density of these three top marine predators in this important feeding ground in the Northwestern Mediterranean Sea. These patterns were investigated regarding known species-specific feeding preferences and environmental characteristics (i. e. mesoscale activity of the survey zone. ABFT was by far the most abundant species during the surveys in terms of schools and individuals, followed by striped dolphins and fin whales. However, when accounted for availability bias, schools of dolphins and fin whales were of equal density. Direct interactions of the species appeared to be the exception, but results indicate that densities, presence and core sighting locations of striped dolphins and ABFT were correlated. Core sighting areas of these species were located close to an area of high mesoscale activity (oceanic fronts and eddies. Fin whales did not show such a correlation. The results further highlight the feasibility to coordinate research efforts to explore the behaviour and abundance of the investigated species, as demanded by the Marine Strategy Framework Directive (MSFD.

  3. Co-Occurrence and Habitat Use of Fin Whales, Striped Dolphins and Atlantic Bluefin Tuna in the Northwestern Mediterranean Sea

    Science.gov (United States)

    Bauer, Robert Klaus; Demarcq, Hervé; Brisset, Blandine

    2015-01-01

    Different dolphin and tuna species have frequently been reported to aggregate in areas of high frontal activity, sometimes developing close multi-species associations to increase feeding success. Aerial surveys are a common tool to monitor the density and abundance of marine mammals, and have recently become a focus in the search for methods to provide fisheries-independent abundance indicators for tuna stock assessment. In this study, we present first density estimates corrected for availability bias of fin whales (Balaenoptera physalus) and striped dolphins (Stenella coeruleoalba) from the Golf of Lions (GoL), compared with uncorrected estimates of Atlantic bluefin tuna (ABFT; Thunnus thynnus) densities from 8 years of line transect aerial surveys. The raw sighting data were further used to analyze patterns of spatial co-occurrence and density of these three top marine predators in this important feeding ground in the Northwestern Mediterranean Sea. These patterns were investigated regarding known species-specific feeding preferences and environmental characteristics (i. e. mesoscale activity) of the survey zone. ABFT was by far the most abundant species during the surveys in terms of schools and individuals, followed by striped dolphins and fin whales. However, when accounted for availability bias, schools of dolphins and fin whales were of equal density. Direct interactions of the species appeared to be the exception, but results indicate that densities, presence and core sighting locations of striped dolphins and ABFT were correlated. Core sighting areas of these species were located close to an area of high mesoscale activity (oceanic fronts and eddies). Fin whales did not show such a correlation. The results further highlight the feasibility to coordinate research efforts to explore the behaviour and abundance of the investigated species, as demanded by the Marine Strategy Framework Directive (MSFD). PMID:26458254

  4. Fin spine bone resorption in atlantic bluefin tuna, Thunnus thynnus, and comparison between wild and captive-reared specimens.

    Directory of Open Access Journals (Sweden)

    Nicoletta Santamaria

    Full Text Available Bone resorption in the first spine of the first dorsal fin of Atlantic bluefin tuna (ABFT has long been considered for age estimation studies. In the present paper spine bone resorption was assessed in wild (aged 1 to 13 years and captive-reared (aged 2 to 11 years ABFT sampled from the Mediterranean Sea. Total surface (TS, solid surface (SS and reabsorbed surface (RS were measured in spine transverse sections in order to obtain proportions of SS and RS. The spine section surface was found to be isometrically correlated to the fish fork length by a power equation. The fraction of solid spine bone progressively decreased according to a logarithmic equation correlating SS/TS to both fish size and age. The values ranged from 57% in the smallest examined individuals to 37% in the largest specimens. This phenomenon was further enhanced in captive-reared ABFT where SS/TS was 22% in the largest measured specimen. The difference between the fraction of SS of wild and captive-reared ABFT was highly significant. In each year class from 1- to 7-year-old wild specimens, the fraction of spine reabsorbed surface was significantly higher in specimens collected from March to May than in those sampled during the rest of the year. In 4-year-old fish the normal SS increase during the summer did not occur, possibly coinciding with their first sexual maturity. According to the correlations between SS/TS and age, the rate of spine bone resorption was significantly higher, even almost double, in captive-reared specimens. This could be attributed to the wider context of systemic dysfunctions occurring in reared ABFT, and may be related to a number of factors, including nutritional deficiencies, alteration of endocrine profile, cortisol-induced stress, and loss of spine functions during locomotion in rearing conditions.

  5. The effect of Mistral (a strong NW wind episodes on the occurrence and abundance of Atlantic bluefin tuna (Thunnus thynnus in the trap fishery of Sardinia (W Mediterranean

    Directory of Open Access Journals (Sweden)

    Piero Addis

    2013-09-01

    Full Text Available From April to June Atlantic bluefin tuna, Thunnus thynnus, migrate along the western Sardinian coastline in a southward direction, where they are intercepted by the trap fishery. Fishermen claim that Mistral episodes facilitate the entry of tuna schools towards the traps, thus increasing capture rates. To test the fishermen’s hypothesis we conducted underwater visual counts of tuna in the trap chambers and analysed these data under the effect of wind. The results indicate a “stair-step” pattern in the abundance of tuna, demonstrating that major increases in abundance are associated with the Mistral. The second analytical approach involved a longer time scale to test whether higher Mistral occurrences corresponded to periods when higher captures were recorded. Using a linear regression model we found a significant correlation (p 15 knots seemed to have a negative effect on captures. This pattern may be caused by wind-induced advection of coastal waters generating a physical boundary that may have had a deterrent effect on tuna schools.

  6. Isotopic discrimination factors and nitrogen turnover rates in reared Atlantic bluefin tuna larvae (Thunnus thynnus: effects of maternal transmission

    Directory of Open Access Journals (Sweden)

    Amaya Uriarte

    2016-11-01

    Full Text Available The use of stable isotope analysis to study animal diets requires estimates of isotopic turnover rates (half time, t50 and discrimination factors (Δ for an accurate interpretation of trophic patterns. The stable isotopes of carbon and nitrogen were analysed for eggs and reared larvae of Thunnus thynnus, as well as for the different diets supplied during the experiment. The results showed high values of δ15N in eggs and larvae (n=646 until 4 DAH. After this time lapse, the stable isotope values declined progressively until 12 DAH, when notochord flexion began. The δ13C showed an inverse trend, suggesting that maternal inheritance of the stable isotopes is evident until pre-flexion stages. This study proposes a model for estimating maternal isotopic signatures of bluefin broodstock. After notochord flexion, larvae were fed with aquaculture-bred gilthead seabream, which resulted in a rapid increase of bluefin larvae δ15N values together with a rapid decrease in δ13C values. The estimated nitrogen half-time to reach the steady state from the diet was 2.5±0.3 days and the discrimination factor was 0.4±0.3(‰. These results represent the first data set that has allowed isotopic nitrogen turnover rates and discrimination factors of the larval stages of bluefin tuna to be estimated.

  7. Molecular Identification of Atlantic Bluefin Tuna (Thunnus thynnus, Scombridae Larvae and Development of a DNA Character-Based Identification Key for Mediterranean Scombrids.

    Directory of Open Access Journals (Sweden)

    Gregory Neils Puncher

    Full Text Available The Atlantic bluefin tuna, Thunnus thynnus, is a commercially important species that has been severely over-exploited in the recent past. Although the eastern Atlantic and Mediterranean stock is now showing signs of recovery, its current status remains very uncertain and as a consequence their recovery is dependent upon severe management informed by rigorous scientific research. Monitoring of early life history stages can inform decision makers about the health of the species based upon recruitment and survival rates. Misidentification of fish larvae and eggs can lead to inaccurate estimates of stock biomass and productivity which can trigger demands for increased quotas and unsound management conclusions. Herein we used a molecular approach employing mitochondrial and nuclear genes (CO1 and ITS1, respectively to identify larvae (n = 188 collected from three spawning areas in the Mediterranean Sea by different institutions working with a regional fisheries management organization. Several techniques were used to analyze the genetic sequences (sequence alignments using search algorithms, neighbour joining trees, and a genetic character-based identification key and an extensive comparison of the results is presented. During this process various inaccuracies in related publications and online databases were uncovered. Our results reveal important differences in the accuracy of the taxonomic identifications carried out by different ichthyoplanktologists following morphology-based methods. While less than half of larvae provided were bluefin tuna, other dominant taxa were bullet tuna (Auxis rochei, albacore (Thunnus alalunga and little tunny (Euthynnus alletteratus. We advocate an expansion of expertise for a new generation of morphology-based taxonomists, increased dialogue between morphology-based and molecular taxonomists and increased scrutiny of public sequence databases.

  8. Environmental and biological characteristics of Atlantic bluefin tuna and albacore spawning habitats based on their egg distributions

    Science.gov (United States)

    Reglero, Patricia; Santos, Maria; Balbín, Rosa; Laíz-Carrión, Raul; Alvarez-Berastegui, Diego; Ciannelli, Lorenzo; Jiménez, Elisa; Alemany, Francisco

    2017-06-01

    Tuna spawning habitats are traditionally characterized using data sets of larvae or gonads from mature adults and concurrent environmental variables. Data on egg distributions have never previously been used since molecular analyses are mandatory to identify tuna eggs to species level. However, in this study we use molecularly derived egg distribution data, in addition to larval data, to characterize hydrographic and biological drivers of the spatial distribution of eggs and larvae of bluefin Thunnus thynnus and albacore tuna Thunnus alalunga in the Balearic Sea, a main spawning area of these species in the Mediterranean. The effects of the hydrography, characterized by salinity, temperature and geostrophic velocity, on the spatial distributions of the eggs and larvae are investigated. Three biological variables are used to describe the productivity in the area: chlorophyll a in the mixed layer, chlorophyll a in the deep chlorophyll maximum and mesozooplankton biomass in the mixed layer. Our results point to the importance of salinity fronts and temperatures above a minimum threshold in shaping the egg and larval distribution of both species. The spatial distribution of the biotic variables was very scattered, and they did not emerge as significant variables in the presence-absence models. However, they became significant when modeling egg and larval abundances. The lack of correlation between the three biotic variables challenges the use of chlorophyll a to describe trophic scenarios for the larvae and suggests that the spatial distribution of resources is not persistent in time. The different patterns in relation to biotic variables across species and stages found in this and other studies indicate a still elusive understanding of the link between trophic levels involving tuna early larval stages. Our ability to improve short-term forecasting and long-term predictions of climate effects on the egg and larval distributions is discussed based on the consistency of

  9. On Making Statistical Inferences Regarding the Relationship between Spawners and Recruits and the Irresolute Case of Western Atlantic Bluefin Tuna (Thunnus thynnus.

    Directory of Open Access Journals (Sweden)

    Clay E Porch

    Full Text Available Forecasts of the future abundance of western Atlantic bluefin tuna (Thunnus thynnus have, for nearly two decades, been based on two competing views of future recruitment potential: (1 a "low" recruitment scenario based on hockey-stick (two-line curve where the expected level of recruitment is set equal to the geometric mean of the recruitment estimates for the years after a supposed regime-shift in 1975, and (2 a "high" recruitment scenario based on a Beverton-Holt curve fit to the time series of spawner-recruit pairs beginning in 1970. Several investigators inferred the relative plausibility of these two scenarios based on measures of their ability to fit estimates of spawning biomass and recruitment derived from stock assessment outputs. Typically, these comparisons have assumed the assessment estimates of spawning biomass are known without error. It is shown here that ignoring error in the spawning biomass estimates can predispose model-choice approaches to favor the regime-shift hypothesis over the Beverton-Holt curve with higher recruitment potential. When the variance of the observation error approaches that which is typically estimated for assessment outputs, the same model-choice approaches tend to favor the single Beverton-Holt curve. For this and other reasons, it is argued that standard model-choice approaches are insufficient to make the case for a regime shift in the recruitment dynamics of western Atlantic bluefin tuna. A more fruitful course of action may be to move away from the current high/low recruitment dichotomy and focus instead on adopting biological reference points and management procedures that are robust to these and other sources of uncertainty.

  10. Characterization of three pro-inflammatory cytokines, TNFα1, TNFα2 and IL-1β, in cage-reared Atlantic bluefin tuna Thunnus thynnus.

    Science.gov (United States)

    Lepen Pleić, Ivana; Secombes, Christopher J; Bird, Steve; Mladineo, Ivona

    2014-01-01

    Atlantic bluefin tuna (BFT) (Thunnus thynnus) is of great economic significance for world aquaculture and therefore it is necessary to ensure optimal and sustainable conditions for the farming of this species. Intensive culture of fish may be limited by infectious diseases that can impact on growth performance and cause heavy losses. However, to date there are no reports of cloning and expression analysis of any major immune genes of Atlantic BFT although some immune genes are known in other BFT species. Therefore the aim of this study was to characterize the first cytokine molecules in Atlantic BFT, through: 1) Isolation of full-length cDNA and gene sequences of TNFα1, TNFα2 and IL-1β, 2) comparison of these molecules to known sequences in other vertebrates, especially teleost fish, by multiple sequence alignment, phylogenetic tree analysis and homology modeling; 3) Quantification of in vivo expression of these cytokines in selected tissues in reared BFT over the duration of the farming process. The results indicated that these three cytokines could have value for monitoring Atlantic BFT health status. Curiously, the liver seemed to be an important site of cytokine production during poor health conditions in this species, perhaps reflecting its role as an important organ involved in fish defenses.

  11. Spawning of bluefin tuna in the black sea: historical evidence, environmental constraints and population plasticity

    DEFF Research Database (Denmark)

    Mackenzie, Brian R; Mariani, Patrizio

    2012-01-01

    The lucrative and highly migratory Atlantic bluefin tuna, Thunnus thynnus (Linnaeus 1758; Scombridae), used to be distributed widely throughout the north Atlantic Ocean, Mediterranean Sea and Black Sea. Its migrations have supported sustainable fisheries and impacted local cultures since antiquity......, but its biogeographic range has contracted since the 1950s. Most recently, the species disappeared from the Black Sea in the late 1980s and has not yet recovered. Reasons for the Black Sea disappearance, and the species-wide range contraction, are unclear. However bluefin tuna formerly foraged...... that the population must have (had) in order to reproduce successfully in the specific hydrographic (estuarine) conditions of the Black Sea. By comparing hydrographic conditions in spawning areas of the three species of bluefin tunas, and applying a mechanistic model of egg buoyancy and sinking rate, we show...

  12. Determination of Temporal Spawning Patterns and Hatching Time in Response to Temperature of Atlantic Bluefin Tuna (Thunnus thynnus) in the Western Mediterranean

    Science.gov (United States)

    Gordoa, Ana; Carreras, Gustavo

    2014-01-01

    This study analysed the temporal pattern of Atlantic bluefin tuna (ABFT) spawning in the Balearic spawning ground and examined its reproductive performance after years in captivity. Furthermore, ABFT hatching time at different on-site temperatures was determined for the first time. Spawning surveys were carried out in 4 spawning seasons (2009–2012) aboard tuna transport vessels. Three groups of spawners were monitored: a captive group transported to the spawning region and monitored throughout the four spawning seasons and two wild groups caught in 2009 and 2010 which were transferred to a monitoring transport cage immediately after being caught. Surface plankton samples were collected nightly, beginning immediately after the first purse seine catches were made and concluding after spawning was observed to have ended. All groups displayed the same spawning hours, restricted between 2:00–5:00 a.m. The captive group, as they got older, shifted towards the earliest hour, suggesting an age influence on reproductive time. The onset of spawning varied annually from the end of May to the beginning of June at temperatures around 19°C–20°C, ending by the second week of July. The peak of spawning was consistently around the summer solstice, June 15th–30th. The results showed the negative effect of unstable oceanographic conditions in the spawning process which might influence the annual reproductive success of ABFT. The influence of temperature on hatching time was higher than that observed in other tuna species, twice as fast at 26°C (23 h) as at 19.5°C (49 h). Overall, this study shows the strength of the internal mechanism in ABFT that controls spawning traits. Spawning in ABFT is cyclical and highly synchronised on diel and annual scales. We consider that the timing of spawning is rather influenced by day length and its adaptive significance is discussed. PMID:24608107

  13. Determination of temporal spawning patterns and hatching time in response to temperature of Atlantic bluefin tuna (Thunnus thynnus in the Western Mediterranean.

    Directory of Open Access Journals (Sweden)

    Ana Gordoa

    Full Text Available This study analysed the temporal pattern of Atlantic bluefin tuna (ABFT spawning in the Balearic spawning ground and examined its reproductive performance after years in captivity. Furthermore, ABFT hatching time at different on-site temperatures was determined for the first time. Spawning surveys were carried out in 4 spawning seasons (2009-2012 aboard tuna transport vessels. Three groups of spawners were monitored: a captive group transported to the spawning region and monitored throughout the four spawning seasons and two wild groups caught in 2009 and 2010 which were transferred to a monitoring transport cage immediately after being caught. Surface plankton samples were collected nightly, beginning immediately after the first purse seine catches were made and concluding after spawning was observed to have ended. All groups displayed the same spawning hours, restricted between 2:00-5:00 a.m. The captive group, as they got older, shifted towards the earliest hour, suggesting an age influence on reproductive time. The onset of spawning varied annually from the end of May to the beginning of June at temperatures around 19 °C-20 °C, ending by the second week of July. The peak of spawning was consistently around the summer solstice, June 15th-30th. The results showed the negative effect of unstable oceanographic conditions in the spawning process which might influence the annual reproductive success of ABFT. The influence of temperature on hatching time was higher than that observed in other tuna species, twice as fast at 26 °C (23 h as at 19.5 °C (49 h. Overall, this study shows the strength of the internal mechanism in ABFT that controls spawning traits. Spawning in ABFT is cyclical and highly synchronised on diel and annual scales. We consider that the timing of spawning is rather influenced by day length and its adaptive significance is discussed.

  14. A cascade of warming impacts brings bluefin tuna to Greenland waters

    DEFF Research Database (Denmark)

    MacKenzie, Brian; Payne, Mark; Boje, Jesper

    in ecological isolation from others. Here we show that a large highly migratory top predator fish species has entered a high latitude sub-polar area. Bluefin tuna, Thunnus thynnus Linnaeus 1758, were captured in waters east of Greenland (65o N) in August 2012 during exploratory fishing for Atlantic mackerel......, Scomber scombrus Linnaeus 1758. The bluefin tuna were captured in a single net-haul in 9-11o C water together with 6 tonnes of mackerel, which is a preferred prey species and itself a new immigrant to the area. Regional temperatures in August 2012 were historically high and contributed to a warming trend...... since 1985, when temperatures began to rise. The presence of bluefin tuna in this region is likely due to a combination of warm temperatures that are physiologically more tolerable and immigration of an important prey species into the region. We conclude that a cascade of climate change impacts...

  15. A cascade of warming impacts brings bluefin tuna to Greenland waters

    DEFF Research Database (Denmark)

    MacKenzie, Brian R.; Payne, Mark R.; Boje, Jesper

    2014-01-01

    in ecological isolation from others. Here, we show that a large highly migratory top predator fish species has entered a high latitude subpolar area beyond its usual range. Bluefin tuna, Thunnus thynnus Linnaeus 1758, were captured in waters east of Greenland (65°N) in August 2012 during exploratory fishing...... for Atlantic mackerel, Scomber scombrus Linnaeus 1758. The bluefin tuna were captured in a single net-haul in 9-11 °C water together with 6 tonnes of mackerel, which is a preferred prey species and itself a new immigrant to the area. Regional temperatures in August 2012 were historically high and contributed...... to a warming trend since 1985, when temperatures began to rise. The presence of bluefin tuna in this region is likely due to a combination of warm temperatures that are physiologically more tolerable and immigration of an important prey species to the region. We conclude that a cascade of climate change...

  16. Trophic ecology of Atlantic Bluefin Tuna (Thunnus thynnus [corrected] larvae from the Gulf of Mexico and NW Mediterranean spawning grounds: A Comparative Stable Isotope Study.

    Directory of Open Access Journals (Sweden)

    Raúl Laiz-Carrión

    Full Text Available The present study uses stable isotopes of nitrogen and carbon (δ15Nandδ13C as trophic indicators for Atlantic bluefin tuna larvae (BFT (6-10 mm standard length in the highly contrasting environmental conditions of the Gulf of Mexico (GOM and the Balearic Sea (MED. These regions are differentiated by their temperature regime and relative productivity, with the GOM being significantly warmer and more productive. MED BFT larvae showed the highest δ15N signatures, implying an elevated trophic position above the underlying microzooplankton baseline. Ontogenetic dietary shifts were observed in the BFT larvae from the GOM and MED which indicates early life trophodynamics differences between these spawning habitats. Significant trophic differences between the GOM and MED larvae were observed in relation to δ15N signatures in favour of the MED larvae, which may have important implications in their growth during their early life stages.These low δ15N levels in the zooplankton from the GOM may be an indication of a shifting isotopic baseline in pelagic food webs due to diatrophic inputs by cyanobacteria. Lack of enrichment for δ15N in BFT larvae compared to zooplankton implies an alternative grazing pathway from the traditional food chain of phytoplankton-zooplankton-larval fish. Results provide insight for a comparative characterization of the trophic pathways variability of the two main spawning grounds for BFT larvae.

  17. Spawning of bluefin tuna in the Black Sea: historical evidence, environmental constraints and population plasticity.

    Directory of Open Access Journals (Sweden)

    Brian R MacKenzie

    Full Text Available The lucrative and highly migratory Atlantic bluefin tuna, Thunnus thynnus (Linnaeus 1758; Scombridae, used to be distributed widely throughout the north Atlantic Ocean, Mediterranean Sea and Black Sea. Its migrations have supported sustainable fisheries and impacted local cultures since antiquity, but its biogeographic range has contracted since the 1950s. Most recently, the species disappeared from the Black Sea in the late 1980s and has not yet recovered. Reasons for the Black Sea disappearance, and the species-wide range contraction, are unclear. However bluefin tuna formerly foraged and possibly spawned in the Black Sea. Loss of a locally-reproducing population would represent a decline in population richness, and an increase in species vulnerability to perturbations such as exploitation and environmental change. Here we identify the main genetic and phenotypic adaptations that the population must have (had in order to reproduce successfully in the specific hydrographic (estuarine conditions of the Black Sea. By comparing hydrographic conditions in spawning areas of the three species of bluefin tunas, and applying a mechanistic model of egg buoyancy and sinking rate, we show that reproduction in the Black Sea must have required specific adaptations of egg buoyancy, fertilisation and development for reproductive success. Such adaptations by local populations of marine fish species spawning in estuarine areas are common as is evident from a meta-analysis of egg buoyancy data from 16 species of fish. We conclude that these adaptations would have been necessary for successful local reproduction by bluefin tuna in the Black Sea, and that a locally-adapted reproducing population may have disappeared. Recovery of bluefin tuna in the Black Sea, either for spawning or foraging, will occur fastest if any remaining locally adapted individuals are allowed to survive, and by conservation and recovery of depleted Mediterranean populations which could

  18. Differentiated stable isotopes signatures between pre- and post-flexion larvae of Atlantic bluefin tuna (Thunnus thynnus) and of its associated tuna species of the Balearic Sea (NW Mediterranean)

    Science.gov (United States)

    García, Alberto; Laiz-Carrión, Raúl; Uriarte, Amaya; Quintanilla, José M.; Morote, Elvira; Rodríguez, José M.; Alemany, Francisco

    2017-06-01

    The trophic ecology of bluefin tuna larvae (Thunnus thynnus) from the Balearic Sea, together with its co-existing tuna species such as albacore (T. alalunga), bullet (Auxis rochei) and little tunny (Euthynnus alletteratus) were examined by nitrogen and carbon stable isotope analyses. A total of 286 larvae were analyzed for this study, of which 72 larvae corresponded to bluefin, 57 to albacore, 81 to bullet tuna and 76 to little tunny. Tuna larvae were separated into the pre-flexion and post-flexion developmental stages. Within the size 3-9 mm standard length (SL), the stable isotope of nitrogen (δ15N) showed significant differences between species where bluefin tuna larvae ranked highest. Pre-flexion bluefin tuna and little tunny larvae showed significantly higher δ15N signatures than the post-flexion larvae. This effect is attributed to a biochemical trace of maternal δ15N signatures. However, neither albacore nor bullet tuna larvae showed this pattern in δ15N signatures, possibly owing to a compensation effect between lower maternal δ15N values transmitted to pre-flexion larvae and the early increase of δ15N values in post-flexion stages. One way ANOVA showed significant differences between species in the stable isotope ratio of carbon (δ13C) values, which suggests specific differences of carbon sources. Furthermore, a similar significant ontogenic effect between δ13C signatures of pre-flexion and post-flexion larvae is also evidenced in all four species. At pre-flexion stages, all species except bullet tuna larvae showed significant negative relationships between δ15N and larval standard length. At post-flexion stages, a significant linear relationship with larval size was only observed in albacore and bullet tuna larvae indicating a possible trophic shift towards early piscivory. With respect to δ13C values with larval size, all four species showed significant linear decreases. It may be explained by the metabolism of growth of somatic mass subject to

  19. Habitat use, vertical and horizontal behaviour of Atlantic bluefin tuna (Thunnus thynnus) in the Northwestern Mediterranean Sea in relation to oceanographic conditions

    Science.gov (United States)

    Bauer, Robert Klaus; Fromentin, Jean-Marc; Demarcq, Hervé; Bonhommeau, Sylvain

    2017-07-01

    We investigated the habitat utilization, vertical and horizontal behaviour of Atlantic bluefin tuna Thunnus thynnus (ABFT) in relation to oceanographic conditions in the northwestern Mediterranean Sea, based on 36 pop-up archival tags and different environmental data sets. Tags were deployed on early mature ABFT (127-255 cm) between July and November in 2007-2014, on the shelf area off Marseille, France. The data obtained from these tags provided 1643 daily summaries of ABFT vertical behaviour over 8 years of tag deployment. Based on a hierarchical clustering of this data, we could identify four principle daily vertical behaviour types, representing surface (≦ 10 m) and subsurface (10-100 m) orientation, moderate (50-200 m) and deep (≧ 200 m) diving behaviour. These vertical behaviour types showed seasonal variations with partly opposing trends in their frequencies. Accordingly, ABFT were more surface orientated during summer, while moderate diving behaviour was more common during winter. Depth time series data further revealed inverted day-night patterns for both of these periods. Tagged ABFT frequented the surface waters more regularly during daytime and deeper waters during the night in summer, while the opposite pattern was found in winter. Seasonal changes in the vertical behaviour of ABFT were accompanied by simultaneous changes in environmental conditions (SST, chla, thermal stratification). Accordingly, surface orientation and moderate diving behaviour appeared to be triggered by the thermal stratification of the water column, though less pronounced than previously reported for ABFT in the North Atlantic, probably indicating adaptive vertical behaviour related to the availability of epipelagic food resources (anchovies and sardines). Deep diving behaviour was particularly frequent during months of high biological productivity (February-May), although one recovered tag showed periodic and unusual long spike dives during summer-autumn, in relation to

  20. A full lifecycle bioenergetic model for bluefin tuna.

    NARCIS (Netherlands)

    Jusup, M.; Klanjscek, T.; Matsuda, H.; Kooijman, S.A.L.M.

    2011-01-01

    We formulated a full lifecycle bioenergetic model for bluefin tuna relying on the principles of Dynamic Energy Budget theory. Traditional bioenergetic models in fish research deduce energy input and utilization from observed growth and reproduction. In contrast, our model predicts growth and

  1. Trace elements in the kidney tissue of Bluefin Tuna ( Thunnus ...

    African Journals Online (AJOL)

    Trace elements, namely lead (Pb), copper (Cu), manganese (Mn), nickel (Ni), zinc (Zn), and iron (Fe), found in kidney tissues were analyzed and compared between wild/fattened and female/male bluefin tuna (BFT) in the Eastern Mediterranean region of Turkey. One hundred (that is, 50 female and 50 male) individual ...

  2. Bluefin tuna fishing and ranching: a difficult management problem

    NARCIS (Netherlands)

    Stefano, de V.; Heijden, van der P.G.M.

    2007-01-01

    The fish processing industry and consumers in Japan are willing to pay high (and sometimes outrageous) prices for fresh bluefin tuna with fat content and flesh colour just right to be served raw as sashimi or sushi. This willingness was and still is the economic incentive for a high fishing pressure

  3. Morphological characterisation and identification of four species of Cardicola Short, 1953 (Trematoda: Aporocotylidae) infecting the Atlantic bluefin tuna Thunnus thynnus (L.) in the Mediterranean Sea.

    Science.gov (United States)

    Palacios-Abella, José F; Rodríguez-Llanos, Javier; Mele, Salvatore; Montero, Francisco E

    2015-06-01

    Blood flukes of the genus Cardicola Short, 1953 are considered the most potentially pathogenic parasites in bluefin tuna cultures. Morphological study and genetic analyses of the ribosomal internal transcribed spacer ITS-2 and the mitochondrial cytochrome c oxidase 1 (cox1) gene fragments revealed the occurrence of four aporocotylid species (C. forsteri Cribb, Daintith & Munday, 2000, C. orientalis Ogawa, Tanaka, Sugihara & Takami, 2010, C. opisthorchis Ogawa, Ishimaru, Shirakashi, Takami & Grabner, 2011 and Cardicola sp.) in 421 Thunnus thynnus (L.) from the Western Mediterranean (274 fished from the wild and 147 from sea-cages). Cardicola opisthorchis was the most abundant species, with higher prevalence in the cage-reared fish than in those fished in the wild (21 vs 6%, p < 0.05). Adults of three species were recovered: C. forsteri from both gills and heart, C. opisthorchis from heart and C. orientalis from gills. The secondary gill lamellae were profusely infected by eggs of C. orientalis. A fourth species was found in four tunas, based on the molecular analyses of eggs apparently indistinguishable in size and shape from the eggs of C. orientalis. The findings provided evidence that infections with Cardicola spp. differed in relation to locality, host origin (wild vs cage-reared) and site of infection. It is necessary to estimate the possible different pathogenic effects of each species of Cardicola in order to take appropriate control measures.

  4. A cascade of warming impacts brings bluefin tuna to Greenland waters.

    Science.gov (United States)

    MacKenzie, Brian R; Payne, Mark R; Boje, Jesper; Høyer, Jacob L; Siegstad, Helle

    2014-08-01

    Rising ocean temperatures are causing marine fish species to shift spatial distributions and ranges, and are altering predator-prey dynamics in food webs. Most documented cases of species shifts so far involve relatively small species at lower trophic levels, and consider individual species in ecological isolation from others. Here, we show that a large highly migratory top predator fish species has entered a high latitude subpolar area beyond its usual range. Bluefin tuna, Thunnus thynnus Linnaeus 1758, were captured in waters east of Greenland (65°N) in August 2012 during exploratory fishing for Atlantic mackerel, Scomber scombrus Linnaeus 1758. The bluefin tuna were captured in a single net-haul in 9-11 °C water together with 6 tonnes of mackerel, which is a preferred prey species and itself a new immigrant to the area. Regional temperatures in August 2012 were historically high and contributed to a warming trend since 1985, when temperatures began to rise. The presence of bluefin tuna in this region is likely due to a combination of warm temperatures that are physiologically more tolerable and immigration of an important prey species to the region. We conclude that a cascade of climate change impacts is restructuring the food web in east Greenland waters. © 2014 John Wiley & Sons Ltd.

  5. Modelling retention and dispersion mechanisms of bluefin tuna eggs and larvae in the Northwest Mediterranean Sea

    DEFF Research Database (Denmark)

    Mariani, Patrizio; MacKenzie, Brian; Iudicone, D.

    2010-01-01

    Knowledge of early life history of most fish species in the Mediterranean Sea is sparse and processes affecting their recruitment are poorly understood. This is particularly true for bluefin tuna, Thunnus thynnus, even though this species is one of the world's most valued fish species. Here we...... Sea. The model reproduced the drift and growth of anchovy larvae as they drifted along the Catalan coast and yielded similar patterns as those observed in the field. We then applied the model to investigate transport and retention processes affecting the spatial distribution of bluefin tuna eggs...... locations of spawning bluefin tuna using hydrographic backtracking procedures; these locations were situated in a major salinity frontal zone and coincided with distributions of an electronically tagged bluefin tuna and commercial bluefin tuna fishing vessels. Moreover, we hypothesized that mesoscale...

  6. Spatially explicit estimates of stock sizes, structure and biomass of herring and blue whiting, and catch data of bluefin tuna

    DEFF Research Database (Denmark)

    Huse, G.; MacKenzie, B. R.; Trenkel, V.

    2015-01-01

    The North Atlantic is a productive marine region which has supported important commercial fisheries for centuries. Many of these fisheries have exploited the pelagic species, including herring, blue whiting and tuna. Here we present data on the distribution of herring and blue whiting based...... on the international ecosystem survey in the Nordic Seas (IESNS), the bottom trawl survey in the Bay of Biscay and Celtic Sea (EVHOE) and the pelagic survey in the Bay of Biscay (PELGAS). We also present catch data on bluefin tuna, which has been depleted for decades but historically used to be a key predator...... on the other pelagic stocks during summer. The results show that there were substantial changes in the herring and blue whiting distribution during the 1990s and early 2000s. The earliest bluefin tuna catches noted were in 1907. The catches in the Norwegian Sea area peaked in the 1950s and there have been very...

  7. Temporal distribution of size and weight of fattened Bluefin tuna (Thunnus thynnus l. from Tunisian farms: (2005-2010

    Directory of Open Access Journals (Sweden)

    A. HATTOUR

    2013-12-01

    Full Text Available The present study analysis size and weight-frequency composition of Atlantic bluefin tuna (Thunnus thynnus thynnus fattened in Tunisian farms for the period 2005-2010 and compare these morphometric parameters with those from wild bluefin tuna landed on 2001 at Sfax port (Tunisia. A total of 6,757 wild and fattened bluefin tuna were measured as straight-line fork length and 49,962 were weighted. Average value of K for wild BFT was 1.59 and respectively 2.43, 2.32, 2.15, 1.61, 1.79 and 1.90 for Fattened BFT after 5-6 months from 2005 to 2010. Length frequency of fattened bluefin showed clearly a substantial increase in juvenile rate. The percentage which was 21.4% in 2005 reached 31.3% in 2009. For weight distribution, 73.3% of the fish caught in 2001 are below the annual mean (75.7 kg, while means 71 to 72% of fattened fish were under annual mean weight. Year 2009 is exceptional because only 57% of fattened fish were under the mean weight. This demonstrates that the fish caught are becoming increasingly small. Mean weight for fattening period (77 to 124 kg are obviously higher than those of the wild fish (75,7kg.This study showed an increment in the amount of specimen under first sexual maturity which will not have the chance to spawn.

  8. Evolutionary changes of multiple visual pigment genes in the complete genome of Pacific bluefin tuna

    OpenAIRE

    Nakamura, Yoji; Mori, Kazuki; Saitoh, Kenji; Oshima, Kenshiro; Mekuchi, Miyuki; Sugaya, Takuma; Shigenobu, Yuya; Ojima, Nobuhiko; Muta, Shigeru; Fujiwara, Atushi; Yasuike, Motoshige; Oohara, Ichiro; Hirakawa, Hideki; Chowdhury, Vishwajit Sur; Kobayashi, Takanori

    2013-01-01

    Tunas are migratory fishes in offshore habitats and top predators with unique features. Despite their ecological importance and high market values, the open-ocean lifestyle of tuna, in which effective sensing systems such as color vision are required for capture of prey, has been poorly understood. To elucidate the genetic and evolutionary basis of optic adaptation of tuna, we determined the genome sequence of the Pacific bluefin tuna (Thunnus orientalis), using next-generation sequencing tec...

  9. First attempt to assess the viability of bluefin tuna spawning events in offshore cages located in an a priori favourable larval habitat

    Directory of Open Access Journals (Sweden)

    Patricia Reglero

    2013-10-01

    Full Text Available Most of the Atlantic bluefin tuna caught by the purse-seine fleet in the Mediterranean Sea are transferred alive into transport cages and towed to coastal facilities where they are fattened. This major fishery is targeting aggregations of reproductive bluefin tuna that continue spawning within the transport cages. Our study is the first attempt to assess the viability of the spawning events within transport cages placed offshore in a priori favourable locations for larval survival. The study was conducted in June 2010 in the Balearic Sea, a main spawning area for bluefin tuna in the Mediterranean. The location of two transport cages, one with wild and one with captive tuna, coincide with the situation of the chlorophyll front using satellite imagery as a proxy for the salinity front between resident surface waters and those of recent Atlantic origin. The results showed that bluefin tuna eggs were spawned almost every day within the two cages but few or no larvae were found. The expected larval densities estimated after applying mortality curves to the daily egg densities observed in the cages were higher than the sampled larval densities. The trajectories of the eggs after hatching estimated from a particle tracking model based on observed geostrophic currents and a drifter deployed adjacent to the cage suggest that larvae were likely to be caught close to the cages within the sampling dates. Spawning events in captive tuna in transport cages may hatch into larvae though they may experience higher mortality rates than expected in natural populations. The causes of the larval mortality are further discussed in the text. Such studies should be repeated in other spawning areas in the Mediterranean if spawning in cages located offshore in areas favourable a priori for larval survival is likely to be considered a management measurement to minimize the impact of purse-seine fishing on tuna.

  10. Evidence of separate subgroups of juvenile southern bluefin tuna.

    Science.gov (United States)

    Chambers, Mark S; Sidhu, Leesa A; O'Neill, Ben; Sibanda, Nokuthaba

    2017-11-01

    Archival tagging studies of southern bluefin tuna (SBT , Thunnus maccoyii) have revealed that juveniles residing in the Great Australian Bight (GAB) over the austral summer undertake seasonal cyclic migrations to the southeast Indian Ocean and the Tasman Sea during winter. However, there remains disagreement about the extent of mixing between juvenile SBT regularly caught by longline fleets south of Africa and those observed in the GAB. Some researchers have argued that archival tag recoveries indicate most juveniles reside in the GAB over the austral summer. Others have suggested that recoveries of conventional and archival tags are better explained by a juvenile population consisting of separate groups on the eastern and western sides of the Indian Ocean with limited intermixing. We present analyses of catch and tag recovery data and re-examine archival tagging studies. The evidence provided strongly favors the hypothesis of separate juvenile subgroups, or contingents, with limited intermixing. We draw some tentative conclusions about the nature of the putative contingents and discuss some implications of these findings for the interpretation of existing datasets and future research priorities. We also provide the first evidence that the migration choices of juveniles that summer in the GAB are influenced by fidelity to winter feeding grounds and suggest this helps explain the collapse of the surface fishery off New South Wales in the 1980s.

  11. Radioactive Cesium from Fukushima Japan Detected in Bluefin Tuna off California: Implications for Public Health and for Tracking Migration

    Directory of Open Access Journals (Sweden)

    Fisher N. S.

    2013-04-01

    Full Text Available Bluefin tuna are highly migratory pelagic fish. Pacific bluefin tuna are spawned in waters off Japan and some juveniles migrate across the Pacific to waters off California. Bluefin that had recently migrated and caught in waters off San Diego, California in August 2011 were found to have 134Cs and 137Cs in their muscle tissue, at concentrations that could only have come from the Fukushima nuclear reactor in Japan. Bluefin tuna caught 3 years earlier off San Diego and yellowfin tuna that are resident to the eastern Pacific had no 134Cs and only background levels of 137Cs. The radioactivity in tuna attributable to these Cs isotopes was only 2.8% of that from the naturally occurring 40K, suggesting that consumption of these fish poses little risk to public health. The presence of these isotopes in animal tissues can be used to discern migratory routes and timing for those animals that use the western Pacific.

  12. a statistical model for stock assessment of southern bluefin tuna with ...

    African Journals Online (AJOL)

    Assessment of the status of southern bluefin tuna (SBT) by Australia and Japan has used a method (ADAPT) that imposes a number of structural restrictions, and is similar to methods used for a number of stocks worldwide. A flexible method for assessment of the SBT population is presented that is much less restrictive and ...

  13. Warm fish with cold hearts: thermal plasticity of excitation-contraction coupling in bluefin tuna.

    Science.gov (United States)

    Shiels, H A; Di Maio, A; Thompson, S; Block, B A

    2011-01-07

    Bluefin tuna have a unique physiology. Elevated metabolic rates coupled with heat exchangers enable bluefin tunas to conserve heat in their locomotory muscle, viscera, eyes and brain, yet their hearts operate at ambient water temperature. This arrangement of a warm fish with a cold heart is unique among vertebrates and can result in a reduction in cardiac function in the cold despite the elevated metabolic demands of endothermic tissues. In this study, we used laser scanning confocal microscopy and electron microscopy to investigate how acute and chronic temperature change affects tuna cardiac function. We examined the temporal and spatial properties of the intracellular Ca2+ transient (Δ[Ca2+]i) in Pacific bluefin tuna (Thunnus orientalis) ventricular myocytes at the acclimation temperatures of 14°C and 24°C and at a common test temperature of 19°C. Acute (less than 5 min) warming and cooling accelerated and slowed the kinetics of Δ[Ca2+]i, indicating that temperature change limits cardiac myocyte performance. Importantly, we show that thermal acclimation offered partial compensation for these direct effects of temperature. Prolonged cold exposure (more than four weeks) increased the amplitude and kinetics of Δ[Ca2+]i by increasing intracellular Ca2+ cycling through the sarcoplasmic reticulum (SR). These functional findings are supported by electron microscopy, which revealed a greater volume fraction of ventricular SR in cold-acclimated tuna myocytes. The results indicate that SR function is crucial to the performance of the bluefin tuna heart in the cold. We suggest that SR Ca2+ cycling is the malleable unit of cellular Ca2+ flux, offering a mechanism for thermal plasticity in fish hearts. These findings have implications beyond endothermic fish and may help to delineate the key steps required to protect vertebrate cardiac function in the cold.

  14. Evolutionary changes of multiple visual pigment genes in the complete genome of Pacific bluefin tuna.

    Science.gov (United States)

    Nakamura, Yoji; Mori, Kazuki; Saitoh, Kenji; Oshima, Kenshiro; Mekuchi, Miyuki; Sugaya, Takuma; Shigenobu, Yuya; Ojima, Nobuhiko; Muta, Shigeru; Fujiwara, Atushi; Yasuike, Motoshige; Oohara, Ichiro; Hirakawa, Hideki; Chowdhury, Vishwajit Sur; Kobayashi, Takanori; Nakajima, Kazuhiro; Sano, Motohiko; Wada, Tokio; Tashiro, Kosuke; Ikeo, Kazuho; Hattori, Masahira; Kuhara, Satoru; Gojobori, Takashi; Inouye, Kiyoshi

    2013-07-02

    Tunas are migratory fishes in offshore habitats and top predators with unique features. Despite their ecological importance and high market values, the open-ocean lifestyle of tuna, in which effective sensing systems such as color vision are required for capture of prey, has been poorly understood. To elucidate the genetic and evolutionary basis of optic adaptation of tuna, we determined the genome sequence of the Pacific bluefin tuna (Thunnus orientalis), using next-generation sequencing technology. A total of 26,433 protein-coding genes were predicted from 16,802 assembled scaffolds. From these, we identified five common fish visual pigment genes: red-sensitive (middle/long-wavelength sensitive; M/LWS), UV-sensitive (short-wavelength sensitive 1; SWS1), blue-sensitive (SWS2), rhodopsin (RH1), and green-sensitive (RH2) opsin genes. Sequence comparison revealed that tuna's RH1 gene has an amino acid substitution that causes a short-wave shift in the absorption spectrum (i.e., blue shift). Pacific bluefin tuna has at least five RH2 paralogs, the most among studied fishes; four of the proteins encoded may be tuned to blue light at the amino acid level. Moreover, phylogenetic analysis suggested that gene conversions have occurred in each of the SWS2 and RH2 loci in a short period. Thus, Pacific bluefin tuna has undergone evolutionary changes in three genes (RH1, RH2, and SWS2), which may have contributed to detecting blue-green contrast and measuring the distance to prey in the blue-pelagic ocean. These findings provide basic information on behavioral traits of predatory fish and, thereby, could help to improve the technology to culture such fish in captivity for resource management.

  15. Effects of temperature acclimation on Pacific bluefin tuna (Thunnus orientalis) cardiac transcriptome.

    Science.gov (United States)

    Jayasundara, Nishad; Gardner, Luke D; Block, Barbara A

    2013-11-01

    Little is known about the mechanisms underpinning thermal plasticity of vertebrate hearts. Bluefin tuna hearts offer a unique model to investigate processes underlying thermal acclimation. Their hearts, while supporting an endothermic physiology, operate at ambient temperature, and are presented with a thermal challenge when migrating to different thermal regimes. Here, we examined the molecular responses in atrial and ventricular tissues of Pacific bluefin tuna acclimated to 14°C, 20°C, and 25°C. Quantitative PCR studies showed an increase in sarcoplasmic reticulum Ca(2+) ATPase gene expression with cold acclimation and an induction of Na(+)/Ca(2+)-exchanger gene at both cold and warm temperatures. These data provide evidence for thermal plasticity of excitation-contraction coupling gene expression in bluefin tunas and indicate an increased capacity for internal Ca(2+) storage in cardiac myocytes at 14°C. Transcriptomic analysis showed profound changes in cardiac tissues with acclimation. A principal component analysis revealed that temperature effect was greatest on gene expression in warm-acclimated atrium. Overall data showed an increase in cardiac energy metabolism at 14°C, potentially compensating for cold temperature to optimize bluefin tuna performance in colder oceans. In contrast, metabolic enzyme activity and gene expression data suggest a decrease in ATP production at 25°C. Expression of genes involved in protein turnover and molecular chaperones was also decreased at 25°C. Expression of genes involved in oxidative stress response and programmed cell death suggest an increase in oxidative damage and apoptosis at 25°C, particularly in the atrium. These findings provide insights into molecular processes that may characterize cardiac phenotypes at upper thermal limits of teleosts.

  16. Tuna and swordfish catch in the U.S. northwest Atlantic longline fishery in relation to mesoscale eddies.

    Science.gov (United States)

    Hsu, Ango C; Boustany, Andre M; Roberts, Jason J; Chang, Jui-Han; Halpin, Patrick N

    2015-11-01

    To analyze the effects of mesoscale eddies, sea surface temperature (SST), and gear configuration on the catch of Atlantic bluefin (Thunnus thynnus), yellowfin (Thunnus albacares), and bigeye tuna (Thunnus obesus) and swordfish (Xiphias gladius) in the U.S. northwest Atlantic longline fishery, we constructed multivariate statistical models relating these variables to the catch of the four species in 62 121 longline hauls made between 1993 and 2005. During the same 13-year period, 103 anticyclonic eddies and 269 cyclonic eddies were detected by our algorithm in the region 30-55°N, 30-80°W. Our results show that tuna and swordfish catches were associated with different eddy structures. Bluefin tuna catch was highest in anticyclonic eddies whereas yellowfin and bigeye tuna catches were highest in cyclonic eddies. Swordfish catch was found preferentially in regions outside of eddies. Our study confirms that the common practice of targeting tuna with day sets and swordfish with night sets is effective. In addition, bluefin tuna and swordfish catches responded to most of the variables we tested in the opposite directions. Bluefin tuna catch was negatively correlated with longitude and the number of light sticks used whereas swordfish catch was positively correlated with these two variables. We argue that overfishing of bluefin tuna can be alleviated and that swordfish can be targeted more efficiently by avoiding fishing in anticyclonic eddies and in near-shore waters and using more light sticks and fishing at night in our study area, although further studies are needed to propose a solid oceanography-based management plan for catch selection.

  17. Retinal ganglion cell topography in juvenile Pacific bluefin tuna Thunnus orientalis (Temminck and Schlegel).

    Science.gov (United States)

    Miyazaki, Taeko

    2014-02-01

    The retinal ganglion cell distribution, which is known to reflect fish feeding behavior, was investigated in juvenile Pacific bluefin tuna Thunnus orientalis. During the course of examination, regularly arrayed cells with a distinctive larger soma, which may be regarded as motion-sensitive cells, were found. The topographical distribution of ordinary-sized ganglion cells, which is usually utilized to estimate fish visual axis and/or visual field characteristics, showed that the highest-density area, termed the area centralis, was localized in the ventral-temporal retina. The retinal topography of ordinary-sized ganglion cells seems to reflect the bluefin tuna's foraging behavior; while cruising, cells in the area centralis may signal potential prey, such as small schooling pelagic fishes or squids, that are present in the upward-forward direction. Judging from morphological characteristics, the large ganglion cells localized in the small temporal retinal area seem to be equivalent to physiologically categorized off-center Y-cells of cat, which are stimulated by a transient dark spot in a bright visual field. It was inferred that presumed large off-center cells in the temporal retina detect movements of agile prey animals escaping from bluefin tuna as a silhouette against environmental light.

  18. Total mercury levels in muscle tissue of swordfish (Xiphias gladius) and bluefin tuna (Thunnus thynnus) from the Mediterranean Sea (Italy).

    Science.gov (United States)

    Storelli, M M; Marcotrigiano, G O

    2001-07-01

    This study was carried out to determine the current levels of total mercury in the muscle tissue of swordfish (Xiphias gladius) and bluefin tuna (Thunnus thynnus) caught in the Mediterranean Sea with the purpose of ascertaining whether the concentrations exceeded the maximum level fixed by the European Commission Decision. In addition, specimens of each species were divided into different ranges of weight to investigate the influence of size on mercury accumulation in order to provide data upon which commercial fishing strategies and marketing of swordfish and bluefin tuna may be based. Higher mean levels of total mercury were found in bluefin tuna (1.02 microg g(-1) wet wt) than in swordfish (0.49 microg g(-1) wet wt). In 4.3% of swordfish and in 44.3% of bluefin tuna analyzed, total mercury concentrations exceeded the maximum level fixed by the European Commission Decision (Hg = 1 microg g(-1) wet wt). Besides, for bluefin tuna the total mercury level variability observed, due to size, suggests that there should be greater regulatory control by the authorities.

  19. Larval stages of the bluefin tuna blood fluke Cardicola opisthorchis (Trematoda: Aporocotylidae) found from Terebella sp. (Polychaeta: Terebellidae).

    Science.gov (United States)

    Sugihara, Yukitaka; Yamada, Toshiyuki; Tamaki, Akio; Yamanishi, Ryohei; Kanai, Kinya

    2014-04-01

    We found aporocotylid larval stages (sporocysts and cercariae) from five individuals of terebellid polychaete Terebella sp., which were collected from seabed substrate and ropes and floats attached to tuna cages in a tuna farm on the coast of Tsushima Island, Nagasaki, Japan. Nucleotide sequences of the regions of internal transcribed spacer 2 ribosomal DNA and 28S ribosomal DNA from these larval stages were 100% identical to those of Cardicola opisthorchis registered in GenBank. C. opisthorchis is a pathogen causing blood fluke infection of Pacific bluefin tuna Thunnus orientalis, which is considered to have a significant impact on the Japanese Pacific bluefin tuna aquaculture industry. This is the first description of the intermediate host of C. opisthorchis. This indicates that the life cycle of C. opisthorchis is completed within tuna farms in this area. Copyright © 2013 Elsevier Ireland Ltd. All rights reserved.

  20. Mercury in Pacific bluefin tuna (Thunnus orientalis):bioaccumulation and trans-Pacific Ocean migration

    Science.gov (United States)

    Colman, John A.; Nogueira, Jacob I.; Pancorbo, Oscar C.; Batdorf, Carol A.; Block, Barbara A.

    2015-01-01

    Pacific bluefin tuna (Thunnus orientalis) have the largest home range of any tuna species and are well known for the capacity to make transoceanic migrations. We report the measurement of mercury (Hg) concentrations in wild Pacific bluefin tuna (PBFT), the first reported with known size-of-fish and capture location. The results indicate juvenile PBFT that are recently arrived in the California Current from the western Pacific Ocean have significantly higher Hg concentrations in white muscle (0.51 ug/g wet mass, wm) than PBFT of longer California Current residency (0.41 ug/g wm). These new arrivals are also higher in Hg concentration than PBFT in farm pens (0.43 ug/g wm) that were captured on arrival in the California Current and raised in pens on locally derived feed. Analysis by direct Hg analyzer and attention to Hg by tissue type and location on the fish allowed precise comparisons of mercury among wild and captive fish populations. Analysis of migration and nearshore residency, determined through extensive archival tagging, bioaccumulation models, trophic investigations, and potential coastal sources of methylmercury, indicates Hg bioaccumulation is likely greater for PBFT juvenile habitats in the western Pacific Ocean (East China Sea, Yellow Sea) than in the eastern Pacific Ocean (California Current). Differential bioaccumulation may be a trophic effect or reflect methylmercury availability, with potential sources for coastal China (large hypoxic continental shelf receiving discharge of three large rivers, and island-arc volcanism) different from those for coastal Baja California (small continental shelf, no large rivers, spreading-center volcanism).

  1. First data on growth and nucleic acid and protein content of field-captured Mediterranean bluefin (Thunnus thynnus and albacore (Thunnus alalunga tuna larvae: a comparative study

    Directory of Open Access Journals (Sweden)

    Alberto García

    2006-10-01

    Full Text Available The waters surrounding the Balearic archipelago are considered to be prime spawning habitats of the bluefin tuna (Thunnus thynnus and other tuna species such as albacore (T. alalunga in the Mediterranean. During the 2003 bluefin and albacore spawning season, a tuna larval survey (TUNIBAL 0703 was carried out to assess the distribution of bluefin larvae in relation to hydrographic mesoscale features. Tuna larvae were collected by means of surface plankton tows with a bongo gear with a quadrangular mouth measuring 1 m diagonally. The otolith microstructure of 157 and 71 field-captured larvae of Mediterranean bluefin and albacore, respectively, were analyzed to estimate the daily growth pattern. Furthermore, biochemical analysis to estimate DNA, RNA and protein content was done on another batch of 114 bluefin and 132 albacore larvae. The size range included pre-flexion to post-flexion larvae, from 2.8 to 8.6 mm in body length. bluefin and albacore larvae grew linearly in standard length (0.35 and 0.33 mm/day, respectively and potentially with respect to dry weight. No significant differences between species were observed in the size-weight relationship, or in the allometric relationship of body size and weight to otolith radius. However, the relationship of DNA and RNA to body size and weight showed a significant difference between species. Bluefin tuna larvae showed a greater nucleic acid content than albacore larvae. Protein content showed no significant differences with respect to body length.

  2. A reconstructed database of historic bluefin tuna captures in the Gibraltar Strait and Western Mediterranean

    Directory of Open Access Journals (Sweden)

    Josué M. Polanco-Martínez

    2018-02-01

    Full Text Available This data paper presents a reconstruction of a compilation of a small but consistent database of historical capture records of bluefin tuna (Thunnus thynnus; BFT hereafter from the Gibraltar Strait and Western Mediterranean (Portugal, Spain and Italy. The compilation come from diverse historical and documentary sources and span the time interval from 1525 to 1936 covering a period of 412 years. There is a total of 3074 datum, which reach up to 67.83% of the total implying a 32.17% of missing data. However, we have only reconstructed the captures for the time interval 1700–1936 and we provide these reconstructions only for this time interval and for 9 out of 11 series due to the scarcity and inhomogeneity of the two oldest capture time series. This reconstructed database provides an invaluable opportunity for fisheries and marine research as well as for multidisciplinary research in climate change.

  3. A reconstructed database of historic bluefin tuna captures in the Gibraltar Strait and Western Mediterranean.

    Science.gov (United States)

    Polanco-Martínez, Josué M; Caballero-Alfonso, Ángela M; Ganzedo, Unai; Castro-Hernández, José J

    2018-02-01

    This data paper presents a reconstruction of a compilation of a small but consistent database of historical capture records of bluefin tuna (Thunnus thynnus; BFT hereafter) from the Gibraltar Strait and Western Mediterranean (Portugal, Spain and Italy). The compilation come from diverse historical and documentary sources and span the time interval from 1525 to 1936 covering a period of 412 years. There is a total of 3074 datum, which reach up to 67.83% of the total implying a 32.17% of missing data. However, we have only reconstructed the captures for the time interval 1700-1936 and we provide these reconstructions only for this time interval and for 9 out of 11 series due to the scarcity and inhomogeneity of the two oldest capture time series. This reconstructed database provides an invaluable opportunity for fisheries and marine research as well as for multidisciplinary research in climate change.

  4. Preliminary approach on early post mortem stress and quality indexes changes in large size bluefin tuna (Thunnus thynnus

    Directory of Open Access Journals (Sweden)

    R. Ugolini

    2010-01-01

    Full Text Available Bluefin tuna (Thunnus thynnus is very appreciated on Japan and USA market for the preparation of sushi and sahimi. The market price of the fresh product can vary from 8 to 33 Euro/kg (gate farm/producers prices according to size, shape, fat level, meat colour, consistency and freshness (absence of “hyake”, all parameters strictly connected to feeding quality and quantity, rearing and killing stress factors and refrigeration times and conditions after death. Excessive levels of stress during the slaughtering can affect meat quality, contributing to significantly decrease of tuna’s price. The present trial was carried out to evaluate the possible harvesting/slaughtering stress effect on reared bluefin tuna meat quality, starting from the examination of the most important stress and quality parameters changes during the early post mortem period.

  5. Morphological, nutritional and safety traits of bluefin tuna (Thunnus thynnus reared in floating cages

    Directory of Open Access Journals (Sweden)

    B. M. Poli

    2010-04-01

    Full Text Available To evaluate the influence of fattening on morphological, nutritional and safety characteristics, two lots of bluefin tuna were sampled before (November: 2 C, 4 ? and after 5 months of fattening (April: 5 C, 5 ?. The specimens, after death, were refrigerated and analysed at different times over the period of a week for morphological and flesh physico-chemical parameters in six muscle sites. Tuna sampled in April had greater body weight (44.04 vs 36.41kg, trunk length (52.21 vs 48.22cm and minimum and maximum circumferences (13.74 vs 12.77 and 94.90 vs 89.10cm. No differences in other linear measures or body components were found. Fattening did not influence flesh colour or total lipid content, producing small differences in its chemical composition: greater C18:0, C18:1n9 and PUFAn6 percentages; higher putrescine and histamine (0.489 vs 0.335 and 0.666 vs 0.370mg/kg but lower spermine and spermidine (10.598 vs 17.387 and 2.420 vs 3.928mg/kg levels. Large differences in physico-chemical parameters were found between muscle sites and a significant interaction between sampling date and muscle site indicated non homogeneous changes in chemical composition of dorsal, ventral and red muscle after fattening. Sex only influenced fat content in viscera (C 12.84 vs ? 9.84%.

  6. A functional genomics tool for the Pacific bluefin tuna: Development of a 44K oligonucleotide microarray from whole-genome sequencing data for global transcriptome analysis.

    Science.gov (United States)

    Yasuike, Motoshige; Fujiwara, Atushi; Nakamura, Yoji; Iwasaki, Yuki; Nishiki, Issei; Sugaya, Takuma; Shimizu, Akio; Sano, Motohiko; Kobayashi, Takanori; Ototake, Mitsuru

    2016-02-01

    Bluefin tunas are one of the most important fishery resources worldwide. Because of high market values, bluefin tuna farming has been rapidly growing during recent years. At present, the most common form of the tuna farming is based on the stocking of wild-caught fish. Therefore, concerns have been raised about the negative impact of the tuna farming on wild stocks. Recently, the Pacific bluefin tuna (PBT), Thunnus orientalis, has succeeded in completing the reproduction cycle under aquaculture conditions, but production bottlenecks remain to be solved because of very little biological information on bluefin tunas. Functional genomics approaches promise to rapidly increase our knowledge on biological processes in the bluefin tuna. Here, we describe the development of the first 44K PBT oligonucleotide microarray (oligo-array), based on whole-genome shotgun (WGS) sequencing and large-scale expressed sequence tags (ESTs) data. In addition, we also introduce an initial 44K PBT oligo-array experiment using in vitro grown peripheral blood leukocytes (PBLs) stimulated with immunostimulants such as lipopolysaccharide (LPS: a cell wall component of Gram-negative bacteria) or polyinosinic:polycytidylic acid (poly I:C: a synthetic mimic of viral infection). This pilot 44K PBT oligo-array analysis successfully addressed distinct immune processes between LPS- and poly I:C- stimulated PBLs. Thus, we expect that this oligo-array will provide an excellent opportunity to analyze global gene expression profiles for a better understanding of diseases and stress, as well as for reproduction, development and influence of nutrition on tuna aquaculture production. Copyright © 2015 The Authors. Published by Elsevier B.V. All rights reserved.

  7. Amino Acid Isotope Incorporation and Enrichment Factors in Pacific Bluefin Tuna, Thunnus orientalis

    Science.gov (United States)

    Bradley, Christina J.; Madigan, Daniel J.; Block, Barbara A.; Popp, Brian N.

    2014-01-01

    Compound specific isotopic analysis (CSIA) of amino acids has received increasing attention in ecological studies in recent years due to its ability to evaluate trophic positions and elucidate baseline nutrient sources. However, the incorporation rates of individual amino acids into protein and specific trophic discrimination factors (TDFs) are largely unknown, limiting the application of CSIA to trophic studies. We determined nitrogen turnover rates of individual amino acids from a long-term (up to 1054 days) laboratory experiment using captive Pacific bluefin tuna, Thunnus orientalis (PBFT), a large endothermic pelagic fish fed a controlled diet. Small PBFT (white muscle δ15N∼11.5‰) were collected in San Diego, CA and transported to the Tuna Research and Conservation Center (TRCC) where they were fed a controlled diet with high δ15N values relative to PBFT white muscle (diet δ15N∼13.9‰). Half-lives of trophic and source amino acids ranged from 28.6 to 305.4 days and 67.5 to 136.2 days, respectively. The TDF for the weighted mean values of amino acids was 3.0 ‰, ranging from 2.2 to 15.8 ‰ for individual combinations of 6 trophic and 5 source amino acids. Changes in the δ15N values of amino acids across trophic levels are the underlying drivers of the trophic 15N enrichment. Nearly all amino acid δ15N values in this experiment changed exponentially and could be described by a single compartment model. Significant differences in the rate of 15N incorporation were found for source and trophic amino acids both within and between these groups. Varying half-lives of individual amino acids can be applied to migratory organisms as isotopic clocks, determining the length of time an individual has spent in a new environment. These results greatly enhance the ability to interpret compound specific isotope analyses in trophic studies. PMID:24465724

  8. Amino acid isotope incorporation and enrichment factors in Pacific bluefin tuna, Thunnus orientalis.

    Directory of Open Access Journals (Sweden)

    Christina J Bradley

    Full Text Available Compound specific isotopic analysis (CSIA of amino acids has received increasing attention in ecological studies in recent years due to its ability to evaluate trophic positions and elucidate baseline nutrient sources. However, the incorporation rates of individual amino acids into protein and specific trophic discrimination factors (TDFs are largely unknown, limiting the application of CSIA to trophic studies. We determined nitrogen turnover rates of individual amino acids from a long-term (up to 1054 days laboratory experiment using captive Pacific bluefin tuna, Thunnus orientalis (PBFT, a large endothermic pelagic fish fed a controlled diet. Small PBFT (white muscle δ(15N∼11.5‰ were collected in San Diego, CA and transported to the Tuna Research and Conservation Center (TRCC where they were fed a controlled diet with high δ(15N values relative to PBFT white muscle (diet δ(15N∼13.9‰. Half-lives of trophic and source amino acids ranged from 28.6 to 305.4 days and 67.5 to 136.2 days, respectively. The TDF for the weighted mean values of amino acids was 3.0 ‰, ranging from 2.2 to 15.8 ‰ for individual combinations of 6 trophic and 5 source amino acids. Changes in the δ(15N values of amino acids across trophic levels are the underlying drivers of the trophic (15N enrichment. Nearly all amino acid δ(15N values in this experiment changed exponentially and could be described by a single compartment model. Significant differences in the rate of (15N incorporation were found for source and trophic amino acids both within and between these groups. Varying half-lives of individual amino acids can be applied to migratory organisms as isotopic clocks, determining the length of time an individual has spent in a new environment. These results greatly enhance the ability to interpret compound specific isotope analyses in trophic studies.

  9. Global habitat preferences of commercially valuable tuna

    KAUST Repository

    Arrizabalaga, Haritz

    2015-03-01

    In spite of its pivotal role in future implementations of the Ecosystem Approach to Fisheries Management, current knowledge about tuna habitat preferences remains fragmented and heterogeneous, because it relies mainly on regional or local studies that have used a variety of approaches making them difficult to combine. Therefore in this study we analyse data from six tuna species in the Pacific, Atlantic and Indian Oceans in order to provide a global, comparative perspective of habitat preferences. These data are longline catch per unit effort from 1958 to 2007 for albacore, Atlantic bluefin, southern bluefin, bigeye, yellowfin and skipjack tunas. Both quotient analysis and Generalised Additive Models were used to determine habitat preference with respect to eight biotic and abiotic variables. Results confirmed that, compared to temperate tunas, tropical tunas prefer warm, anoxic, stratified waters. Atlantic and southern bluefin tuna prefer higher concentrations of chlorophyll than the rest. The two species also tolerate most extreme sea surface height anomalies and highest mixed layer depths. In general, Atlantic bluefin tuna tolerates the widest range of environmental conditions. An assessment of the most important variables determining fish habitat is also provided. © 2014 Elsevier Ltd.

  10. Cardicola opisthorchis n. sp. (Trematoda: Aporocotylidae) from the Pacific bluefin tuna, Thunnus orientalis (Temminck & Schlegel, 1844), cultured in Japan.

    Science.gov (United States)

    Ogawa, K; Ishimaru, K; Shirakashi, S; Takami, I; Grabner, D

    2011-09-01

    A new aporocotylid blood fluke is described, based on specimens from the ventricle of the Pacific bluefin tuna, Thunnus orientalis (Temminck et Schlegel), cultured in Wakayama and Nagasaki Prefectures, Japan. The new species is morphologically similar to the members of the genus Cardicola Short, 1953, but shows distinct differences in the body form, location of the testis and the orientation of the ootype. The body of the new species is long and slender, whereas other Cardicola species are small and generally lanceolate. The testis is mostly located posterior to the caeca and anterior to the ovary, occupying 31-45% of body length, in contrast to the known Cardicola species, whose testis is typically intercaecal. The ootype is oriented anteriorly, while in most congeners, it is directed posteriorly or horizontally. Phylogenetic analyses of this aporocotylid, together with Cardicola orientalis Ogawa, Tanaka, Sugihara et Takami, 2010 from the same host, were conducted based on DNA sequences of the ITS2 rDNA and the 28S region of ribosomal RNA. The analyses revealed that the new blood fluke belongs to the genus Cardicola despite the marked morphological differences. Thus, this aporocotylid is named Cardicola opisthorchis n. sp. and the generic diagnosis is emended in this paper. In addition, 100% identity among the ITS2 sequences from the present species, Cardicola sp. from T. orientalis in Mexico and Cardicola sp. from the northern bluefin tuna, Thunnus thynnus (Linnaeus) in Spain suggests that C. opisthorchis n. sp. has a broad geographical distribution and that it infects both the Pacific and northern bluefin tuna. Copyright © 2011 Elsevier Ireland Ltd. All rights reserved.

  11. Quantifying mercury isotope dynamics in captive Pacific bluefin tuna (Thunnus orientalis

    Directory of Open Access Journals (Sweden)

    Sae Yun Kwon

    2016-02-01

    Full Text Available Abstract Analyses of mercury (Hg isotope ratios in fish tissues are used increasingly to infer sources and biogeochemical processes of Hg in natural aquatic ecosystems. Controlled experiments that can couple internal Hg isotope behavior with traditional isotope tracers (δ13C, δ15N can improve the applicability of Hg isotopes as natural ecological tracers. In this study, we investigated changes in Hg isotope ratios (δ202Hg, Δ199Hg during bioaccumulation of natural diets in the pelagic Pacific bluefin tuna (Thunnus orientalis; PBFT. Juvenile PBFT were fed a mixture of natural prey and a dietary supplement (60% Loligo opalescens, 31% Sardinops sagax, 9% gel supplement in captivity for 2914 days, and white muscle tissues were analyzed for Hg isotope ratios and compared to time in captivity and internal turnover of δ13C and δ15N. PBFT muscle tissues equilibrated to Hg isotope ratios of the dietary mixture within ∼700 days, after which we observed a cessation in further shifts in Δ199Hg, and small but significant negative δ202Hg shifts from the dietary mixture. The internal behavior of Δ199Hg is consistent with previous fish studies, which showed an absence of Δ199Hg fractionation during Hg bioaccumulation. The negative δ202Hg shifts can be attributed to either preferential excretion of Hg with higher δ202Hg values or individual variability in captive PBFT feeding preferences and/or consumption rates. The overall internal behavior of Hg isotopes is similar to that described for δ13C and δ15N, though observed Hg turnover was slower compared to carbon and nitrogen. This improved understanding of internal dynamics of Hg isotopes in relation to δ13C and δ15N enhances the applicability of Hg isotope ratios in fish tissues for tracing Hg sources in natural ecosystems.

  12. Spawning Dynamics and Size Related Trends in Reproductive Parameters of Southern Bluefin Tuna, Thunnus maccoyii.

    Directory of Open Access Journals (Sweden)

    Jessica H Farley

    Full Text Available Knowledge of spawning behaviour and fecundity of fish is important for estimating the reproductive potential of a stock and for constructing appropriate statistical models for assessing sustainable catch levels. Estimates of length-based reproductive parameters are particularly important for determining potential annual fecundity as a function of fish size, but they are often difficult to estimate reliably. Here we provide new information on the reproductive dynamics of southern bluefin tuna (SBT Thunnus maccoyii through the analysis of fish size and ovary histology collected on the spawning ground in 1993-1995 and 1999-2002. These are used to refine previous parameter estimates of spawning dynamics and investigate size related trends in these parameters. Our results suggest that the small SBT tend to arrive on the spawning ground slightly later and depart earlier in the spawning season relative to large fish. All females were mature and the majority were classed as spawning capable (actively spawning or non-spawning with a very small proportion classed as regressing. The fraction of females spawning per day decreased with fish size, but once females start a spawning episode, they spawned daily irrespective of size. Mean batch fecundity was estimated directly at 6.5 million oocytes. Analysis of ovary histology and ovary weight data indicated that relative batch fecundity, and the duration of spawning and non-spawning episodes, increased with fish size. These reproductive parameter estimates could be used with estimates of residency time on the spawning ground as a function of fish size (if known and demographic data for the spawning population to provide a time series of relative annual fecundity for SBT.

  13. 76 FR 13583 - Atlantic Highly Migratory Species; Atlantic Bluefin Tuna Quotas and Atlantic Tuna Fisheries...

    Science.gov (United States)

    2011-03-14

    ..., Excel, WordPerfect, or Adobe PDF file formats only. To be considered, electronic comments must be... quota specifications in order to adjust the 2011 BFT baseline quota and subquotas to account for dead... base quotas for the 2012 fishing year based on the best estimate of dead discards and information...

  14. 76 FR 39019 - Atlantic Highly Migratory Species; Atlantic Bluefin Tuna Quotas and Atlantic Tuna Fisheries...

    Science.gov (United States)

    2011-07-05

    ... Impact Review, and Final Regulatory Flexibility Analysis (EA/RIR/FRFA), are available from Sarah Mc... endangered or threatened under the Endangered Species Act (ESA), and CBD's comments on the 90-day finding... Deepwater Horizon BP oil spill, the 2012 SCRS BFT stock assessment, and the 2012 ICCAT BFT recommendations...

  15. Tissue turnover rates and isotopic trophic discrimination factors in the endothermic teleost, pacific bluefin tuna (Thunnus orientalis.

    Directory of Open Access Journals (Sweden)

    Daniel J Madigan

    Full Text Available Stable isotope analysis (SIA of highly migratory marine pelagic animals can improve understanding of their migratory patterns and trophic ecology. However, accurate interpretation of isotopic analyses relies on knowledge of isotope turnover rates and tissue-diet isotope discrimination factors. Laboratory-derived turnover rates and discrimination factors have been difficult to obtain due to the challenges of maintaining these species in captivity. We conducted a study to determine tissue- (white muscle and liver and isotope- (nitrogen and carbon specific turnover rates and trophic discrimination factors (TDFs using archived tissues from captive Pacific bluefin tuna (PBFT, Thunnus orientalis, 1-2914 days after a diet shift in captivity. Half-life values for (15N turnover in white muscle and liver were 167 and 86 days, and for (13C were 255 and 162 days, respectively. TDFs for white muscle and liver were 1.9 and 1.1‰ for δ(15N and 1.8 and 1.2‰ for δ(13C, respectively. Our results demonstrate that turnover of (15N and (13C in bluefin tuna tissues is well described by a single compartment first-order kinetics model. We report variability in turnover rates between tissue types and their isotope dynamics, and hypothesize that metabolic processes play a large role in turnover of nitrogen and carbon in PBFT white muscle and liver tissues. (15N in white muscle tissue showed the most predictable change with diet over time, suggesting that white muscle δ(15N data may provide the most reliable inferences for diet and migration studies using stable isotopes in wild fish. These results allow more accurate interpretation of field data and dramatically improve our ability to use stable isotope data from wild tunas to better understand their migration patterns and trophic ecology.

  16. Brain morphology and immunohistochemical localization of the gonadotropin-releasing hormone in the bluefin tuna, Thunnus thynnus

    Directory of Open Access Journals (Sweden)

    G Palmieri

    2009-08-01

    Full Text Available The present study was focused on the morphology of the diencephalic nuclei (likely involved in reproductive functions as well as on the distribution of GnRH (gonadotropin-releasing hormone in the rhinencephalon, telencephalon and the diencephalon of the brain of bluefin tuna (Thunnus thynnus by means of immunohistochemistry. Bluefin tuna has an encephalization quotient (QE similar to that of other large pelagic fish. Its brain exhibits well-developed optic tecta and corpus cerebelli. The diencephalic neuron cell bodies involved in reproductive functions are grouped in two main nuclei: the nucleus preopticus-periventricularis and the nucleus lateralis tuberis. The nucleus preopticus-periventricularis consists of the nucleus periventricularis and the nucleus preopticus consisting of a few sparse multipolar neurons in the rostral part and numerous cells closely packed and arranged in several layers in its aboral part. The nucleus lateralis tuberis is located in the ventral-lateral area of the diencephalon and is made up of a number of large multipolar neurones. Four different polyclonal primary antibodies against salmon (sGnRH, chicken (cGnRH-II (cGnRH-II 675, cGnRH-II 6 and sea bream (sbGnRH were employed in the immunohistochemical experiments. No immunoreactive structures were found with anti sbGnRH serum. sGnRH and cGnRH-II antisera revealed immunoreactivity in the perikarya of the olfactory bulbs, preopticus-periventricular nucleus, oculomotor nucleus and midbrain tegmentum. The nucleus lateralis tuberis showed immunostaining only with anti-sGnRH serum. Nerve fibres immunoreactive to cGnRH and sGnRH sera were found in the olfactory bulbs, olfactory nerve and neurohypophysis. The significance of the distribution of the GnRHimmunoreactive neuronal structures is discussed.

  17. Discovery of intermediate hosts for two species of blood flukes Cardicola orientalis and Cardicola forsteri (Trematoda: Aporocotylidae) infecting Pacific bluefin tuna in Japan.

    Science.gov (United States)

    Shirakashi, Sho; Tani, Kazuki; Ishimaru, Katsuya; Shin, Sang Phil; Honryo, Tomoki; Uchida, Hiro'omi; Ogawa, Kazuo

    2016-04-01

    Fish blood flukes (Aporocotylidae) are important pathogens of farmed finfish around the world. Among them, Cardicola spp. infecting farmed tuna are considered to be serious threats to tuna farming and have received tremendous attention. We conducted periodical samplings at a tuna farming site in Japan between January and May, 2015 to determine the life cycle of Cardicola spp. We collected over 4700 terebellid polychaetes from ropes, floats and frames of tuna culture cages and found nearly 400 infected worms. Sporocysts and cercariae found in Nicolea gracilibranchis were genetically identified as Cardicola orientalis by 28S and ITS2 ribosomal DNA sequences. This was the first discovery of the intermediate host for this parasite species. Infection prevalence and the abundance of N. gracilibranchis significantly varied between sampling points and the highest number of infected terebellids were collected from ropes. We also demonstrated morphologically and molecularly that asexual stages found in a single Amphitrite sp. (Terebellidae) and adult worms isolated from farmed juvenile tuna were Cardicola forsteri. This is the first report of C. forsteri in Pacific bluefin tuna (PBT) Thunnus orientalis in Japan. Our results demonstrated that all three species of Cardicola orientalis, C. forsteri and Cardicola opisthorchis exist in Japanese farmed PBTs and that they all use terebellid polychaetes as the intermediate hosts. Copyright © 2015 Elsevier Ireland Ltd. All rights reserved.

  18. Habitat overlap between southern bluefin tuna and yellowfin tuna in the east coast longline fishery - implications for present and future spatial management

    Science.gov (United States)

    Hartog, Jason R.; Hobday, Alistair J.; Matear, Richard; Feng, Ming

    2011-03-01

    Southern bluefin tuna (SBT) are presently a quota-managed species in the multi-species eastern Australian tuna and billfish longline fishery (ETBF). Capture of SBT is regulated by quota, as is access to regions likely to contain SBT. A habitat prediction model combining data from an ocean model and pop-up satellite archival tags is used to define habitat zones based on the probability of SBT occurrence. These habitat zones are used by fishery managers to restrict access by ETBF fishers to SBT habitat during a May-November management season. The zones display a distinct seasonal cycle driven by the seasonal southward expansion and northward contraction of the East Australia Current (EAC) and as a result access by fishers to particular ocean regions changes seasonally. This species also overlaps with the commercially valuable yellowfin tuna (YFT), thus, we modified the SBT model to generate YFT habitat predictions in order to investigate habitat overlap between SBT and YFT. There is seasonal variation in the overlap of the core habitat between these two species, with overlap early (May-Jul) in the management season and habitat separation occurring towards the end (Aug-Nov). The EAC is one of the fastest warming ocean regions in the southern hemisphere. To consider the future change in distribution of these two species compared to the present and to explore the potential impact on fishers and managers of the future, we use future ocean predictions from the CSIRO Bluelink ocean model for the year 2064 to generate habitat predictions. As the ocean warms on the east coast of Australia and the EAC extends southward, our model predicts the suitable habitat for SBT and YFT will move further south. There was an increase in the overlap of SBT and YFT habitat throughout the management season, due to regional variation of each species' habitat. These results illustrate that a management tradeoff exists between restricting fisher access to SBT habitat and allowing access to YFT

  19. Computational Fluid Dynamics of the Boundary Layer Characteristics of a Pacific Bluefin Tuna

    Science.gov (United States)

    2015-09-18

    Harvested from the Tuna Research Conservation Center... Underwater Vehicle CAD Computer-Aided Design CFD Computational Fluid Dynamics FEA Finite Element Analysis IGES Initial Graphics Exchange...Averaged Navier-Stokes ReL Arc-Length Reynolds Number TKE Turbulent Kinetic Energy 1 1. INTRODUCTION In 2013, a research effort was

  20. An evaluation of management strategies for Atlantic tuna stocks

    Directory of Open Access Journals (Sweden)

    L. T. Kell

    2003-04-01

    Full Text Available International agreements for the International Commission for the Conservation of Atlantic Tunas (ICCAT convention area imply that Atlantic tuna stocks should be managed by strategies based on maximum sustainable yield (MSY; however, there is concern whether this will actually ensure sustainability with sufficiently high probability consistent with the principals of the precautionary approach. Therefore, the performance of MSY management strategies based on current assessment procedures was evaluated using a computer simulation framework. The framework includes the data collection, assessment, prediction, and management processes, as well as the implementation of management regulations. It therefore provides an integrated way to evaluate the relative importance of and the interactions between each component of the system with regard to the overall success of the management strategy. The study elucidates guidelines about assessment and management that are general enough to be applied to all tunas in the Atlantic Ocean. It does so by comparing different hypotheses about management and assessment for three stocks (North Atlantic albacore, Atlantic bigeye and East Atlantic skipjack, which are representative of the variety encountered (i.e. from data rich to poor and tropical to temperate waters in ICCAT stocks. Management performance was especially sensitive to the carrying capacity of the stock. The type of proxy used for MSY was more important to the success of the procedure than the frequency of assessment or the number of indices used in the assessment. Whilst the procedure was successful at achieving the management objectives for albacore, it was only partially successful for bigeye and was too conservative for skipjack.

  1. The oxidative stability of chilled and frozen pilchards used as feed for captive southern bluefin tuna

    DEFF Research Database (Denmark)

    Fitz-Gerald, C.H.; Bremner, Allan

    1998-01-01

    demonstrated that the oil in the pilchards is very readily oxidised and careful handling, chilling, freezing and storage procedures need to be adopted to provide a product which is a nutritionally sound feed material for captive tuna. The demerit point scoring system was found to be a rapid evaluative....... Vacuum packaging in a film of low permeability to oxygen was less effective than glazing and is not recommended due to cost. Pilchards in which oxidation had commenced before freezing continued to oxidise in frozen storage irrespective of whether they were glazed or vacuum packed. It was thus thoroughly...

  2. The migration game in habitat network: the case of tuna

    DEFF Research Database (Denmark)

    Mariani, Patrizio; Krivan, Vlastimil; MacKenzie, Brian

    2016-01-01

    habitats, where dispersal is costly. The model predicts migration dynamics between these habitats and the corresponding population distribution. When applied to Atlantic bluefin tunas, it predicts their biomass is located in the spawning areas which have also the largest diversity in the age......-structure. Distant feeding areas are occupied on a seasonal base and often by larger individuals, in agreement with empirical observations. Moreover, we show that only a selected number of migratory routes emerge as those effectively used by tunas...

  3. Data reconstruction can improve abundance index estimation: An example using Taiwanese longline data for Pacific bluefin tuna.

    Directory of Open Access Journals (Sweden)

    Shui-Kai Chang

    Full Text Available Catch-per-unit-effort (CPUE is often the main piece of information used in fisheries stock assessment; however, the catch and effort data that are traditionally compiled from commercial logbooks can be incomplete or unreliable due to many reasons. Pacific bluefin tuna (PBF is a seasonal target species in the Taiwanese longline fishery. Since 2010, detailed catch information for each PBF has been made available through a catch documentation scheme. However, previously, only market landing data with a low coverage of logbooks were available. Therefore, several nontraditional procedures were performed to reconstruct catch and effort data from many alternative data sources not directly obtained from fishers for 2001-2015: (1 Estimating the catch number from the landing weight for 2001-2003, for which the catch number information was incomplete, based on Monte Carlo simulation; (2 deriving fishing days for 2007-2009 from voyage data recorder data, based on a newly developed algorithm; and (3 deriving fishing days for 2001-2006 from vessel trip information, based on linear relationships between fishing and at-sea days. Subsequently, generalized linear mixed models were developed with the delta-lognormal assumption for standardizing the CPUE calculated from the reconstructed data, and three-stage model evaluation was performed using (1 Akaike and Bayesian information criteria to determine the most favorable variable composition of standardization models, (2 overall R2 via cross-validation to compare fitting performance between area-separated and area-combined standardizations, and (3 system-based testing to explore the consistency of the standardized CPUEs with auxiliary data in the PBF stock assessment model. The last stage of evaluation revealed high consistency among the data, thus demonstrating improvements in data reconstruction for estimating the abundance index, and consequently the stock assessment.

  4. Data reconstruction can improve abundance index estimation: An example using Taiwanese longline data for Pacific bluefin tuna.

    Science.gov (United States)

    Chang, Shui-Kai; Liu, Hung-I; Fukuda, Hiromu; Maunder, Mark N

    2017-01-01

    Catch-per-unit-effort (CPUE) is often the main piece of information used in fisheries stock assessment; however, the catch and effort data that are traditionally compiled from commercial logbooks can be incomplete or unreliable due to many reasons. Pacific bluefin tuna (PBF) is a seasonal target species in the Taiwanese longline fishery. Since 2010, detailed catch information for each PBF has been made available through a catch documentation scheme. However, previously, only market landing data with a low coverage of logbooks were available. Therefore, several nontraditional procedures were performed to reconstruct catch and effort data from many alternative data sources not directly obtained from fishers for 2001-2015: (1) Estimating the catch number from the landing weight for 2001-2003, for which the catch number information was incomplete, based on Monte Carlo simulation; (2) deriving fishing days for 2007-2009 from voyage data recorder data, based on a newly developed algorithm; and (3) deriving fishing days for 2001-2006 from vessel trip information, based on linear relationships between fishing and at-sea days. Subsequently, generalized linear mixed models were developed with the delta-lognormal assumption for standardizing the CPUE calculated from the reconstructed data, and three-stage model evaluation was performed using (1) Akaike and Bayesian information criteria to determine the most favorable variable composition of standardization models, (2) overall R2 via cross-validation to compare fitting performance between area-separated and area-combined standardizations, and (3) system-based testing to explore the consistency of the standardized CPUEs with auxiliary data in the PBF stock assessment model. The last stage of evaluation revealed high consistency among the data, thus demonstrating improvements in data reconstruction for estimating the abundance index, and consequently the stock assessment.

  5. Data reconstruction can improve abundance index estimation: An example using Taiwanese longline data for Pacific bluefin tuna

    Science.gov (United States)

    Fukuda, Hiromu; Maunder, Mark N.

    2017-01-01

    Catch-per-unit-effort (CPUE) is often the main piece of information used in fisheries stock assessment; however, the catch and effort data that are traditionally compiled from commercial logbooks can be incomplete or unreliable due to many reasons. Pacific bluefin tuna (PBF) is a seasonal target species in the Taiwanese longline fishery. Since 2010, detailed catch information for each PBF has been made available through a catch documentation scheme. However, previously, only market landing data with a low coverage of logbooks were available. Therefore, several nontraditional procedures were performed to reconstruct catch and effort data from many alternative data sources not directly obtained from fishers for 2001–2015: (1) Estimating the catch number from the landing weight for 2001–2003, for which the catch number information was incomplete, based on Monte Carlo simulation; (2) deriving fishing days for 2007–2009 from voyage data recorder data, based on a newly developed algorithm; and (3) deriving fishing days for 2001–2006 from vessel trip information, based on linear relationships between fishing and at-sea days. Subsequently, generalized linear mixed models were developed with the delta-lognormal assumption for standardizing the CPUE calculated from the reconstructed data, and three-stage model evaluation was performed using (1) Akaike and Bayesian information criteria to determine the most favorable variable composition of standardization models, (2) overall R2 via cross-validation to compare fitting performance between area-separated and area-combined standardizations, and (3) system-based testing to explore the consistency of the standardized CPUEs with auxiliary data in the PBF stock assessment model. The last stage of evaluation revealed high consistency among the data, thus demonstrating improvements in data reconstruction for estimating the abundance index, and consequently the stock assessment. PMID:28968434

  6. Active nanocomposite films based on soy proteins-montmorillonite- clove essential oil for the preservation of refrigerated bluefin tuna (Thunnus thynnus) fillets.

    Science.gov (United States)

    Echeverría, Ignacio; López-Caballero, María Elvira; Gómez-Guillén, María Carmen; Mauri, Adriana Noemi; Montero, María Pilar

    2018-02-02

    This manuscript evaluates the potential application of active nanocomposite films based on soy protein isolate (SPI)-montmorillonite (MMT)-clove essential oil (CEO) to the preservation of muscle fillets of bluefin tuna (Thunnus thynnus) during refrigerated storage, and furthermore analyzes whether the clay diffuses from the package to food. SPI films with: CEO (SPI-CEO), MMT (SPI-MMT), or both CEO and MMT (SPI-MMT-CEO), were prepared and used to cover tuna fillets during 17days of storage at 2°C. Polyethylene films were also used as control. Protein films nanoreinforced with 10g MMT/100g SPI and activated with CEO were able to decrease microbial growth (evaluated by TVBN and microorganism counts) and lipid autooxidation (evaluated according to the TBA index, FTIR and color parameters) of tuna fillets during the storage period studied. The presence of clay seemed to favor the release of the active principles of clove oil by prolonging its antimicrobial (especially effective to inhibit Pseudomonas spp.) and antioxidant activity over time without observing the diffusion of the clay's own metals (Si and Al) from the nanocomposite materials to the muscle of fish. These results are encouraging for the use of nanocomposite films in food packaging. Copyright © 2017 Elsevier B.V. All rights reserved.

  7. Tuna cornea as biomaterial for cardiac applications.

    Science.gov (United States)

    Parravicini, Roberto; Cocconcelli, Flavio; Verona, Alessandro; Parravicini, Valeriano; Giuliani, Enrico; Barbieri, Alberto

    2012-01-01

    Among available biomaterials, cornea is almost completely devoid of cells and is composed only of collagen fibers oriented in an orderly pattern, which contributes to low antigenicity. Thunnus thynnus, the Atlantic bluefin tuna, is a fish with large eyes that can withstand pressures of approximately 10 MPa. We evaluated the potential of this tuna cornea in cardiac bioimplantation. Eyes from freshly caught Atlantic bluefin tuna were harvested and preserved in a fixative solution. Sterilized samples of corneal stroma were embedded in paraffin and stained with hematoxylin and eosin, and the histologic features were studied. Physical and mechanical resistance tests were performed in comparison with bovine pericardial strips and porcine mitral valves. Corneal material was implanted subcutaneously in 7 rats, to evaluate in vivo calcification rates. Mitral valves made from tuna corneal leaflets were implanted in 9 sheep. We found that the corneal tissue consisted only of parallel collagen fibers without evidence of vascular or neural structures. In tensile strength, the tuna corneal specimens were substantially similar to bovine pericardium. After 23 days, the rat-implanted samples showed no calcium or calcium salt deposition. Hydrodynamic and fatigue testing of valve prototypes yielded acceptable functional and long-term behavioral results. In the sheep, valvular performance was stable during the 180-day follow-up period, with no instrumental sign of calcification at the end of observation. We conclude that low antigenicity and favorable physical properties qualify tuna cornea as a potential material for durable bioimplantation. Further study is warranted.

  8. Developmental stages of fish blood flukes, Cardicola forsteri and Cardicola opisthorchis (Trematoda: Aporocotylidae), in their polychaete intermediate hosts collected at Pacific bluefin tuna culture sites in Japan.

    Science.gov (United States)

    Ogawa, Kazuo; Shirakashi, Sho; Tani, Kazuki; Shin, Sang Phil; Ishimaru, Katsuya; Honryo, Tomoki; Sugihara, Yukitaka; Uchida, Hiro'omi

    2017-02-01

    Farming of Pacific bluefin tuna (PBT), Thunnus orientalis, is a rapidly growing industry in Japan. Aporocotylid blood flukes of the genus Cardicola comprising C. orientalis, C. opisthorchis and C. forsteri are parasites of economic importance for PBT farming. Recently, terebellid polychaetes have been identified as the intermediate hosts for all these parasites. We collected infected polychaetes, Terebella sp., the intermediate host of C. opisthorchis, from ropes and floats attached to tuna cages in Tsushima, Nagasaki Prefecture, Japan. Also, Neoamphitrite vigintipes (formerly as Amphitrite sp. sensu Shirakashi et al., 2016), the intermediate host of C. forsteri, were collected from culture cages in Kushimoto, Wakayama Prefecture, Japan. The terebellid intermediate hosts harbored the sporocysts and cercariae in their body cavity. Developmental stages of these blood flukes were molecularly identified using species specific PCR primers. In this paper, we describe the cercaria and sporocyst stages of C. opisthorchis and C. forsteri and compare their morphological characteristics among three Cardicola blood flukes infecting PBT. We also discuss phylogenetic relations of the six genera of the terebellid intermediate hosts (Artacama, Lanassa, Longicarpus, Terebella, Nicolea and Neoamphitrite) of blood flukes infecting marine fishes, based on their morphological characters. Copyright © 2016 Elsevier Ireland Ltd. All rights reserved.

  9. 76 FR 52886 - Atlantic Highly Migratory Species; Atlantic Bluefin Tuna Fisheries

    Science.gov (United States)

    2011-08-24

    ... retention limit from the default of one fish may mitigate rolling an excessive amount of unused quota from... fishing patterns and for the impacted sectors to benefit from the adjustments so as to not preclude...: August 18, 2011. Galen R. Tromble, Acting Director, Office of Sustainable Fisheries, National Marine...

  10. 77 FR 15712 - Atlantic Highly Migratory Species; 2012 Atlantic Bluefin Tuna Quota Specifications

    Science.gov (United States)

    2012-03-16

    ... anonymous). Attachments to electronic comments will be accepted in Microsoft Word or Excel, WordPerfect, or... indicates an underharvest of the 2011 adjusted BFT quota. Final 2011 landings and dead discard information... meeting, ICCAT recommended a TAC of 1,750 mt annually for 2011 and for 2012, inclusive of dead discards...

  11. 78 FR 21584 - Atlantic Highly Migratory Species; 2013 Atlantic Bluefin Tuna Quota Specifications

    Science.gov (United States)

    2013-04-11

    ... will be accepted in Microsoft Word, Excel, or Adobe PDF file formats only. The public hearing locations... adjusted BFT quota. Final 2012 landings and dead discard information will be available in late spring 2013... allowed to be carried forward to 2011, and to account for a portion of the estimated 2011 dead discards up...

  12. 76 FR 74003 - Atlantic Highly Migratory Species; Adjustments to the Atlantic Bluefin Tuna General and Harpoon...

    Science.gov (United States)

    2011-11-30

    ... Convention on the International Trade in Endangered Species of Wild Flora and Fauna, and until the 2010... that the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES) opted..., interspersed with mature western BFT on their way to the Gulf of Mexico to breed. This aggregation therefore...

  13. 77 FR 44161 - Atlantic Highly Migratory Species; 2012 Atlantic Bluefin Tuna Quota Specifications

    Science.gov (United States)

    2012-07-27

    ... fish) in 2011 would be reduced by 20 percent. The value of 20 percent was based on a report by the... comment that NMFS should collect more information on all BFT (commercial and recreational), whether landed... `MAST' model (Multistock Age-Structured Tag-Integrated assessment model), which uses electronic tagging...

  14. 77 FR 74612 - Atlantic Highly Migratory Species; Atlantic Bluefin Tuna Fisheries

    Science.gov (United States)

    2012-12-17

    ... feeding habits. Continued BFT landings would support the collection of a broad range of data for these... respect to food production, providing recreational opportunities, preserving traditional fisheries, and..., except for the Gulf of Mexico, and applies to those vessels permitted in the General category as well as...

  15. Immune reactivity in early life stages of sea-cage cultured Pacific bluefin tuna naturally infected with blood flukes from genus Cardicola (Trematoda: Aporocotylidae).

    Science.gov (United States)

    Pennacchi, Ylenia; Shirakashi, Sho; Nowak, Barbara F; Bridle, Andrew R

    2016-11-01

    Pacific bluefin tuna (PBT), Thunnus orientalis, due to its high average price on the market is an economically valuable fish species. Infections by blood flukes from the genus Cardicola (Trematoda: Aporocotylidae) represent a growing concern for the cage culture of bluefin tuna in Japan, Australia and Southern Europe. The accumulation of numerous Cardicola eggs in the fish gills causes severe pathology that has been linked to mortality in PBT juveniles up to one year old. The only effective treatment used to mitigate the infection is the oral administration of the antihelminthic drug praziquantel (PZQ) to the affected fish. However, with the need to minimise therapeutic drug use in aquaculture it is hoped that immunoprophylaxis can provide a future alternative to protect the PBT juveniles against Cardicola infection. Currently, little is known of the host immune response to these parasites and of their infection dynamics. In this study, using real-time qPCR we aimed to quantitatively detect C. orientalis and C. opisthorchis DNA within the gills and heart of cultured PBT juveniles and to investigate the host immune response at the transcriptional level in the gills. The research focused mainly during early stages of infection soon after young PBT were transferred to culture cages (from 14 to 77 days post-transfer). An increase (up to 11-fold) of immune-related genes, namely IgM, MHC-I, TCR-β and IL-1β was observed in the PBT gills infected with Cardicola spp. (28-77 days post-transfer). Furthermore, IgM (19-fold increase) and MHC-I (11.5-fold increase) transcription was strongly up-regulated in gill samples of PBT infected with C. orientalis relative to uninfected fish but not in fish infected with C. opisthorchis. Cardicola-specific DNA was first detected in the host 14 days post-transfer (DPT) to sea-cages which was 55 days earlier than the first detection of parasite eggs and adults by microscopy. Oral administration of PZQ did not have an immediate effect

  16. Ecological role of bluefin tuna (Thunnus thynnus) fish farms for associated wild fish assemblages in the Mediterranean Sea.

    Science.gov (United States)

    Stagličić, Nika; Šegvić-Bubić, Tanja; Ugarković, Pero; Talijančić, Igor; Žužul, Iva; Tičina, Vjekoslav; Grubišić, Leon

    2017-12-01

    The ecological effects of tuna fish farms are largely undocumented. This study confirmed their high capacity to attract surrounding wild fish. The aggregation effect persisted year round, without detectable seasonal differences. Farm impact was restricted to close proximity of the sea cages, and was more prominent over the bottom than in the water column strata. Tuna fish farms proved to be high energy trophic resources, as indicated by the enhanced fitness status of two focal species, bogue and seabream. Under abundant food supply, seabream appear to allocate the majority of energy reserves to gonad development. Farm associated bogue had greater parasite loads, with no detrimental effect on fitness status. Overall, tuna fish farms can be regarded as population sources for aggregated wild fish, and under the no fishing conditions within the leasehold areas, can serve as functional marine protected areas. Copyright © 2017 Elsevier Ltd. All rights reserved.

  17. Environmental preferences of tuna and non-tuna species associated with drifting fish aggregating devices (DFADs) in the Atlantic Ocean, ascertained through fishers' echo-sounder buoys

    Science.gov (United States)

    Lopez, Jon; Moreno, Gala; Lennert-Cody, Cleridy; Maunder, Mark; Sancristobal, Igor; Caballero, Ainhoa; Dagorn, Laurent

    2017-06-01

    Understanding the relationship between environmental variables and pelagic species concentrations and dynamics is helpful to improve fishery management, especially in a changing environment. Drifting fish aggregating device (DFAD)-associated tuna and non-tuna biomass data from the fishers' echo-sounder buoys operating in the Atlantic Ocean have been modelled as functions of oceanographic (Sea Surface Temperature, Chlorophyll-a, Salinity, Sea Level Anomaly, Thermocline depth and gradient, Geostrophic current, Total Current, Depth) and DFAD variables (DFAD speed, bearing and soak time) using Generalized Additive Mixed Models (GAMMs). Biological interaction (presence of non-tuna species at DFADs) was also included in the tuna model, and found to be significant at this time scale. All variables were included in the analyses but only some of them were highly significant, and variable significance differed among fish groups. In general, most of the fish biomass distribution was explained by the ocean productivity and DFAD-variables. Indeed, this study revealed different environmental preferences for tunas and non-tuna species and suggested the existence of active habitat selection. This improved assessment of environmental and DFAD effects on tuna and non-tuna catchability in the purse seine tuna fishery will contribute to transfer of better scientific advice to regional tuna commissions for the management and conservation of exploited resources.

  18. Incorporation of habitat information in the development of indices of larval bluefin tuna (Thunnus thynnus) in the Western Mediterranean Sea (2001-2005 and 2012-2013)

    Science.gov (United States)

    Ingram, G. Walter; Alvarez-Berastegui, Diego; Reglero, Patricia; Balbín, Rosa; García, Alberto; Alemany, Francisco

    2017-06-01

    Fishery independent indices of bluefin tuna larvae in the Western Mediterranean Sea are presented utilizing ichthyoplankton survey data collected from 2001 through 2005 and 2012 through 2013. Indices were developed using larval catch rates collected using two different types of bongo sampling, by first standardizing catch rates by gear/fishing-style and then employing a delta-lognormal modeling approach. The delta-lognormal models were developed three ways: 1) a basic larval index including the following covariates: time of day, a systematic geographic area variable, month and year; 2) a standard environmental larval index including the following covariates: mean water temperature over the mixed layer depth, mean salinity over the mixed layer depth, geostrophic velocity, time of day, a systematic geographic area variable, month and year; and 3) a habitat-adjusted larval index including the following covariates: a potential habitat variable, time of day, a systematic geographic area variable, month and year. Results indicated that all three model-types had similar precision in index values. However, the habitat-adjusted larval index demonstrated a high correlation with estimates of spawning stock biomass from the previous stock assessment model, and, therefore, is recommended as a tuning index in future stock assessment models.

  19. Kudoa prunusi n. sp. (Myxozoa: Multivalvulida) from the brain of Pacific bluefin tuna Thunnus orientalis (Temminck & Schlegel, 1844) cultured in Japan.

    Science.gov (United States)

    Meng, F; Yokoyama, H; Shirakashi, S; Grabner, D; Ogawa, K; Ishimaru, K; Sawada, Y; Murata, O

    2011-01-01

    Kudoa prunusi n. sp. (Myxozoa; Multivalvulida) is described from the brain of Pacific bluefin tuna Thunnus orientalis cultured in Japan. Numerous white cysts, up to 0.5mm in size, were found on and in the brain. Spores having typically five spore valves and five polar capsules resembled a five-petal cherry blossom in apical view and were conical shape with a round bottom in side view. Average spore size was 9.63 (8.5-10.3) μm in width and 7.50 (6.7-8.6) μm in length. The spore dimensions of K. prunusi overlapped with those of Kudoa yasunagai ex Sillago ciliata having five to six spore valves, but they were clearly distinct in spore shape, 18S rDNA and 28S rDNA sequences (0.3% and 1.7% differences, respectively). Phylogenetic analysis of 18S rDNA revealed that K. prunusi grouped with the brain-infecting multivalvulid species, K. yasunagai, K. chaetodoni, K. lethrini and K. neurophila, rather than five-valved Kudoa spp. Combined with morphological, molecular and biological differences, K. prunusi was proven to be a new species. Copyright © 2010 Elsevier Ireland Ltd. All rights reserved.

  20. Effects of the North Atlantic Oscillation on Spanish catches of albacore, Thunnus alalunga, and yellowfin tuna, Thunnus albacares, in the North–east Atlantic Ocean

    Energy Technology Data Exchange (ETDEWEB)

    Rubio, C.J.; MacIas, D.; Camiñas, J.A.; Fernandez, I.L.; Baez, J.C.

    2016-07-01

    Tuna are highly migratory pelagic species (HMPS) with great importance in commercial fishing. Several authors have highlighted the effect of climatic oscillations such as the NAO (North Atlantic Oscillation) on HMPS. This paper analyzes the effects of the NAO on two HMPS: albacore, Thunnus alalunga, and yellowfin tuna, Thunnus albacares. Fishing data from the Spanish fleet operating in the North Atlantic area were obtained from the International Commission for the Conservation of Atlantic Tunas (ICCAT) database. The results show a positive correlation between the NAO index and the Catch per Unit Effort (CPUE) for both albacore and yellowfin tuna, depicting a potential effect on their capturability. (Author)

  1. Bioenergetics, Trophic Ecology, and Niche Separation of Tunas.

    Science.gov (United States)

    Olson, R J; Young, J W; Ménard, F; Potier, M; Allain, V; Goñi, N; Logan, J M; Galván-Magaña, F

    Tunas are highly specialized predators that have evolved numerous adaptations for a lifestyle that requires large amounts of energy consumption. Here we review our understanding of the bioenergetics and feeding dynamics of tunas on a global scale, with an emphasis on yellowfin, bigeye, skipjack, albacore, and Atlantic bluefin tunas. Food consumption balances bioenergetics expenditures for respiration, growth (including gonad production), specific dynamic action, egestion, and excretion. Tunas feed across the micronekton and some large zooplankton. Some tunas appear to time their life history to take advantage of ephemeral aggregations of crustacean, fish, and molluscan prey. Ontogenetic and spatial diet differences are substantial, and significant interdecadal changes in prey composition have been observed. Diet shifts from larger to smaller prey taxa highlight ecosystem-wide changes in prey availability and diversity and provide implications for changing bioenergetics requirements into the future. Where tunas overlap, we show evidence of niche separation between them; resources are divided largely by differences in diet percentages and size ranges of prey taxa. The lack of long-term data limits the ability to predict impacts of climate change on tuna feeding behaviour. We note the need for systematic collection of feeding data as part of routine monitoring of these species, and we highlight the advantages of using biochemical techniques for broad-scale analyses of trophic relations. We support the continued development of ecosystem models, which all too often lack the regional-specific trophic data needed to adequately investigate climate and fishing impacts. © 2016 Elsevier Ltd. All rights reserved.

  2. Spatial distribution of tuna larvae in the Gulf of Gabes (Eastern Mediterranean in relation with environmental parameters

    Directory of Open Access Journals (Sweden)

    W. KOCHED

    2013-03-01

    Full Text Available Spatial distribution and ecology of the larvae of three tuna species (Thunnus thynnus, Auxis rochei and Euthynnus alletteratus were studied during an ichthyoplankton survey carried out in the Gulf of Gabes (Tunisia in June and July 2009. A total of 80 stations, distributed on a regular sampling grid, were sampled. The main objectives of this survey were to provide information on tuna larvae distribution in the Gulf of Gabes in relation to the environmental parameters. Regarding small tunas, larvae of A. rochei (bullet tuna showed the more widespread distribution, being found at both inshore and offshore stations. E. alletteratus (Atlantic black skipjack larvae were mainly found at the inshore stations covering the wide continental shelf of this region. On the other hand, larvae of the large migratory tuna T. Thynnus (Atlantic bluefin tuna, were mainly recorded at offshore stations, suggesting that spawning possibly takes place mainly near the shelf break. Regarding the biological and physical parameters examined, our results indicate that tuna larvae were mainly collected in oligotrophic and mixed waters resulting from the confluence of surface water of recent Atlantic origin and resident surface Mediterranean waters, as shown by their preference for lower chlorophyll a concentrations (from 1.4 to 2.5 mg m-3 and moderate salinity values (between 37.35 and 37.75. Significantly, tuna larvae seemed to avoid the more eutrophic and saltier waters of the gulf situated very close to the coast and around Kerkennah and Djerba islands.

  3. Genetic structuring and migration patterns of Atlantic bigeye tuna, Thunnus obesus (Lowe, 1839).

    Science.gov (United States)

    Gonzalez, Elena G; Beerli, Peter; Zardoya, Rafael

    2008-09-17

    Large pelagic fishes are generally thought to have little population genetic structuring based on their cosmopolitan distribution, large population sizes and high dispersal capacities. However, gene flow can be influenced by ecological (e.g. homing behaviour) and physical (e.g. present-day ocean currents, past changes in sea temperature and levels) factors. In this regard, Atlantic bigeye tuna shows an interesting genetic structuring pattern with two highly divergent mitochondrial clades (Clades I and II), which are assumed to have been originated during the last Pleistocene glacial maxima. We assess genetic structure patterns of Atlantic bigeye tuna at the nuclear level, and compare them with mitochondrial evidence. We examined allele size variation of nine microsatellite loci in 380 individuals from the Gulf of Guinea, Canary, Azores, Canada, Indian Ocean, and Pacific Ocean. To investigate temporal stability of genetic structure, three Atlantic Ocean sites were re-sampled a second year. Hierarchical AMOVA tests, RST pairwise comparisons, isolation by distance (Mantel) tests, Bayesian clustering analyses, and coalescence-based migration rate inferences supported unrestricted gene flow within the Atlantic Ocean at the nuclear level, and therefore interbreeding between individuals belonging to both mitochondrial clades. Moreover, departures from HWE in several loci were inferred for the samples of Guinea, and attributed to a Wahlund effect supporting the role of this region as a spawning and nursery area. Our microsatellite data supported a single worldwide panmictic unit for bigeye tunas. Despite the strong Agulhas Current, immigration rates seem to be higher from the Atlantic Ocean into the Indo-Pacific Ocean, but the actual number of individuals moving per generation is relatively low compared to the large population sizes inhabiting each ocean basin. Lack of congruence between mt and nuclear evidences, which is also found in other species, most likely reflects

  4. Genetic structuring and migration patterns of Atlantic bigeye tuna, Thunnus obesus (Lowe, 1839

    Directory of Open Access Journals (Sweden)

    Beerli Peter

    2008-09-01

    Full Text Available Abstract Background Large pelagic fishes are generally thought to have little population genetic structuring based on their cosmopolitan distribution, large population sizes and high dispersal capacities. However, gene flow can be influenced by ecological (e.g. homing behaviour and physical (e.g. present-day ocean currents, past changes in sea temperature and levels factors. In this regard, Atlantic bigeye tuna shows an interesting genetic structuring pattern with two highly divergent mitochondrial clades (Clades I and II, which are assumed to have been originated during the last Pleistocene glacial maxima. We assess genetic structure patterns of Atlantic bigeye tuna at the nuclear level, and compare them with mitochondrial evidence. Results We examined allele size variation of nine microsatellite loci in 380 individuals from the Gulf of Guinea, Canary, Azores, Canada, Indian Ocean, and Pacific Ocean. To investigate temporal stability of genetic structure, three Atlantic Ocean sites were re-sampled a second year. Hierarchical AMOVA tests, RST pairwise comparisons, isolation by distance (Mantel tests, Bayesian clustering analyses, and coalescence-based migration rate inferences supported unrestricted gene flow within the Atlantic Ocean at the nuclear level, and therefore interbreeding between individuals belonging to both mitochondrial clades. Moreover, departures from HWE in several loci were inferred for the samples of Guinea, and attributed to a Wahlund effect supporting the role of this region as a spawning and nursery area. Our microsatellite data supported a single worldwide panmictic unit for bigeye tunas. Despite the strong Agulhas Current, immigration rates seem to be higher from the Atlantic Ocean into the Indo-Pacific Ocean, but the actual number of individuals moving per generation is relatively low compared to the large population sizes inhabiting each ocean basin. Conclusion Lack of congruence between mt and nuclear evidences, which

  5. Growth and mortality rates of bigeye tuna Thunnus obesus (Perciformes: Scombridae in the central Atlantic Ocean

    Directory of Open Access Journals (Sweden)

    Guoping Zhu

    2009-06-01

    Full Text Available Age and growth parameters were estimated for bigeye tuna Thunnus obesus Lowe, 1839 sampled from China longline fisheries in the central Atlantic Ocean from October 2002 to July 2003 and from August 2004 to March 2005. The von Bertalanffy growth parameters were estimated at L8=217.9 cm fork length, k=0.23 year-1, and t0=-0.44 year. The total mortality rate (Z was estimated to be from 0.82 to 1.02, the fishing mortality (F and the natural mortality were 0.54 year-1 and 0.39 year-1, respectively. The exploitation ratio (E was 0.35. This study provides the detailed estimates of growth and mortality rate for bigeye tuna in the central Atlantic Ocean, which can be used as biological input parameters in further stock evaluations in this region. However, age analysis, additional validation of the size composition and stock structure are needed for future studies. Rev. Biol. Trop. 57 (1-2: 79-88. Epub 2009 June 30.

  6. 77 FR 73969 - International Fisheries; Pacific Tuna Fisheries; Fishing Restrictions in the Eastern Pacific Ocean

    Science.gov (United States)

    2012-12-12

    ... member of the IATTC and to reduce overfishing of the stock. DATES: Comments must be submitted in writing... are an important step for reducing the overfishing of bluefin tuna. In 2011, NMFS determined overfishing is occurring on Pacific bluefin tuna based on stock assessment results of the International...

  7. 76 FR 2313 - Atlantic Highly Migratory Species; Bluefin Tuna Bycatch Reduction in the Gulf of Mexico Pelagic...

    Science.gov (United States)

    2011-01-13

    ... Word, Excel, WordPerfect, or Adobe PDF file formats only. FOR FURTHER INFORMATION CONTACT: Dianne... dead discards will remain below the quota. The proposed rule would require a new gear technology that... that almost all BFT caught by PLL vessels are dead due to the high metabolic stress endured during...

  8. 76 FR 18653 - Atlantic Highly Migratory Species; Bluefin Tuna Bycatch Reduction in the Gulf of Mexico Pelagic...

    Science.gov (United States)

    2011-04-05

    ... slight increase in gear cost due to an increased replacement rate of weak hooks compared to the standard... hooks relatively quickly after being caught and likely do not incur as high a level of metabolic stress... standard circle hooks when BFT are not present in the GOM to mitigate potential economic impacts due to...

  9. 78 FR 52032 - Atlantic Highly Migratory Species; 2006 Consolidated Atlantic Highly Migratory Species Fishery...

    Science.gov (United States)

    2013-08-21

    ... may submit attachments to electronic comments in Microsoft Word or Excel, WordPerfect, or Adobe PDF... must account not only for landings but for bluefin tuna discarded dead. NMFS estimates and accounts for dead discards in the pelagic longline fishery, which cannot target bluefin tuna but catches them while...

  10. Factors that determine the quality of bigeye tuna, caught in the western tropical Atlantic Ocean

    Directory of Open Access Journals (Sweden)

    C.C. Nóbrega

    2014-06-01

    Full Text Available Tuna are highly prized in Oriental cuisine, and the bigeye tuna (Thunnus obesus is of great commercial importance. Quality is assessed by the tuna meat quality, freshness, texture and fat, which can be altered by factors inherent to capture, such as days of onboard storage, months of the year, whether the catch was living or dead, fish weight and year. These factors were correlated to identify those that affect quality. We obtained data from nine vessels, from January 2007 to April 2010, creating an information bank of 21,908 bigeye tuna. Fish quality and parameters were related using multiple linear regression analysis, in which the variables were included in the model by a stepwise procedure (F>4. We found that live catch, heavier fish and fewer days of storage positively affected the quality, and that there is a seasonality of quality related to biological factors, which are not amenable to control.

  11. Vulnerability of teleosts caught by the pelagic tuna longline fleets in South Atlantic and Western Indian Oceans

    Science.gov (United States)

    Lucena-Frédou, Flávia; Kell, Laurie; Frédou, Thierry; Gaertner, Daniel; Potier, Michel; Bach, Pascal; Travassos, Paulo; Hazin, Fábio; Ménard, Frédéric

    2017-06-01

    Productivity and Susceptibility Analysis (PSA) is a methodology for evaluating the vulnerability of a stock based on its biological productivity and susceptibility to fishing. In this study, we evaluated the vulnerability of 60 stocks of tuna, billfishes and other teleosts caught by the tuna longline fleets operating in the South Atlantic and Indian Ocean using a semi-quantitative PSA. We (a) evaluated the vulnerability of the species in the study areas; (b) compared the vulnerability of target and non-target species and oceans; (c) analyzed the sensitivity of data entry; and (d) compared the results of the PSA to other fully quantitative assessment methods. Istiophoridae exhibited the highest scores for vulnerability. The top 10 species at risk were: Atlantic Istiophorus albicans; Indian Ocean Istiompax indica; Atlantic Makaira nigricans and Thunnus alalunga; Indian Ocean Xiphias gladius; Atlantic T. albacares, Gempylus serpens, Ranzania laevis and X. gladius; and Indian Ocean T. alalunga. All species considered at high risk were targeted or were commercialized bycatch, except for the Atlantic G. serpens and R. laevis which were discarded, and may be considered as a false positive. Those species and others at high risk should be prioritized for further assessment and/or data collection. Most species at moderate risk were bycatch species kept for sale. Conversely, species classified at low risk were mostly discarded. Overall, species at high risk were overfished and/or subjected to overfishing. Moreover, all species considered to be within extinction risk (Critically Endangered, Endangered and Vulnerable) were in the high-risk category. The good concordance between approaches corroborates the results of our analysis. PSA is not a replacement for traditional stock assessments, where a stock is assessed at regular intervals to provide management advice. It is of importance, however, where there is uncertainty about catches and life history parameters, since it can

  12. Bluefin Tuna Life History (1972-1979)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Catch and size data for animals from which a collection of fish parts were done for life history studies. These samples will be used in comparison studies with more...

  13. Tuna and dolphin associations in the North-east Atlantic: Evidence of different ecological niches from stable isotope and heavy metal measurements

    Energy Technology Data Exchange (ETDEWEB)

    Das, K.; Lepoint, G.; Loizeau, V.; Debacker, V.; Dauby, P.; Bouquegneau, J.M

    2000-02-01

    Associations of tunas and dolphins in the wild are quite frequent events and the question arises how predators requiring similar diet in the same habitat share their environmental resources. As isotopic composition of an animal is related to that of its preys, stable isotope ({sup 13}C/{sup 12}C and {sup 15}N/{sup 14}N) analyses were performed in three predator species from the North-east Atlantic: the striped dolphin, Stenella coeruleoalba, the common dolphin Delphinus delphis and the albacore tuna, Thunnus alalunga, and compared to their previously described stomach content. Heavy metals (Cd, Zn, Cu and Fe) are mainly transferred through the diet and so, have been determined in the tissues of the animals. Tuna muscles display higher {delta}{sup 15}N than in common and striped dolphins (mean: 11.4 vs. 10.3%o and 10.4%o, respectively) which reflects their higher trophic level nutrition. Higher {delta}{sup 13}C are found in common (-18.4%o) and striped dolphin (-18.1%o) muscles than in albacore tuna (-19.3%o) probably in relation with its migratory pattern. The most striking feature is the presence of two levels of cadmium concentrations in the livers of the tunas (32 mg kg{sup -1} dry weight (DW) vs. 5 mg kg{sup -1} DW). These two groups also differ by their iron concentrations and their {delta}{sup 15}N and {delta}{sup 13}C liver values. These results suggest that in the Biscay Bay, tunas occupy two different ecological niches probably based on different squid inputs in their diet.

  14. Reconstruction of spatiotemporal capture data by means of orthogonal functions: the case of skipjack tuna (Katsuwonus pelamis in the central-east Atlantic

    Directory of Open Access Journals (Sweden)

    Unai Ganzedo

    2013-10-01

    Full Text Available The information provided by the International Commission for the Conservation of Atlantic Tunas (ICCAT on captures of skipjack tuna (Katsuwonus pelamis in the central-east Atlantic has a number of limitations, such as gaps in the statistics for certain fleets and the level of spatiotemporal detail at which catches are reported. As a result, the quality of these data and their effectiveness for providing management advice is limited. In order to reconstruct missing spatiotemporal data of catches, the present study uses Data INterpolating Empirical Orthogonal Functions (DINEOF, a technique for missing data reconstruction, applied here for the first time to fisheries data. DINEOF is based on an Empirical Orthogonal Functions decomposition performed with a Lanczos method. DINEOF was tested with different amounts of missing data, intentionally removing values from 3.4% to 95.2% of data loss, and then compared with the same data set with no missing data. These validation analyses show that DINEOF is a reliable methodological approach of data reconstruction for the purposes of fishery management advice, even when the amount of missing data is very high.

  15. Skipjack Tuna Availability for Purse Seine Fisheries Is Driven by Suitable Feeding Habitat Dynamics in the Atlantic and Indian Oceans

    Directory of Open Access Journals (Sweden)

    Jean-Noël Druon

    2017-10-01

    Full Text Available An Ecological Niche model was developed for skipjack tuna (Katsuwonus pelamis, SKJ in the Eastern Central Atlantic Ocean (AO and Western Indian Ocean (IO using an extensive set of presence data collected by the European purse seine fleet (1998–2014. Chlorophyll-a fronts were used as proxy for food availability while mixed layer depth, sea surface temperature, dissolved oxygen, salinity, current intensity, and height anomaly variables were selected to describe SKJ's abiotic environmental preferences. The resultant ecological niche included both mesoscale eddy-type productive features that displayed latitudinal range in the IO to large scale upwelling systems that shrink and swell seasonally in the AO. Overall, 83% of all free swimming school sets (FSC and 75% of drifting fish aggregating device sets (dFAD that contained SKJ occurred within 25 km of favorable feeding habitat. In the AO, 34% of dFAD sets were made more than 100 km away from this habitat, mostly in the surface chlorophyll-a poor environment of the Guinea Current. These distant sets represent 10% of dFAD sets in the IO and 8% of all FSC sets. Our results suggest that the Mozambique Channel in the IO, with its simultaneously favorable feeding and spawning conditions, may seasonally offer a better SKJ nursery habitat than the Guinea Current which shows a substantially poorer feeding capacity. With the exception of this latter area, our results also suggest that fishing accessibility will be higher in months where the size of the favorable feeding habitats are reduced, likely because this reduction drives a geographical contraction in SKJ populations. The observed relationship between the annual size of favorable feeding habitat and both annual catch rates and total catches in the IO is consistent with the near-full exploitation of this stock that has occurred since the 2000s. Moreover, it suggests that annual habitat size could be used as an indicator of growth capacity for this

  16. Tuna Species Substitution in the Spanish Commercial Chain: A Knock-On Effect.

    Science.gov (United States)

    Gordoa, Ana; Carreras, Gustavo; Sanz, Nuria; Viñas, Jordi

    2017-01-01

    Intentional mislabelling of seafood is a widespread problem, particularly with high-value species like tuna. In this study we examine tuna mislabelling, deliberate species substitution, types of substitution and its impact on prices. The survey covered the commercial chain, from Merca-Barna to fishmongers and restaurants in the Spanish Autonomous Community of Catalonia. To understand the geographic extent of the problem we also sampled Merca-Madrid, Europe's biggest fish market, and Merca-Málaga for its proximity to the bluefin tuna migratory route and trap fishery. Monthly surveys were carried out over one year. The results showed a high deficiency in labelling: 75% of points of sale and 83% of restaurants did not specify the species, and in those cases the name of the species had to be asked. A total of 375 samples were analysed genetically, the largest dataset gathered in Europe so far. The identified species were Thunnus albacares, Thunnus thynnus and Thunnus obesus. Species substitution began at suppliers, with 40% of observed cases, increasing to 58% at fishmongers and 62% at restaurants. The substitution was mainly on bluefin tuna (T. thynnus), 73% of cases. At restaurants, only during the bluefin fishing season, we observed a decrease of Bluefin tuna substitution and an increase of reverse substitution revealing some illegal fishing. The effect of species substitution on species prices was relevant: T. obesus increased its price by around €12 kg-1 when it was sold as bluefin. In view of the deficiency of labelling, the abuse of generic names and the lack of the bluefin catch document, we conclude that the Spanish regulations are ineffective, highlighting the need for policy execution, and the urgent need for information campaigns to Spanish consumers.

  17. Tuna Species Substitution in the Spanish Commercial Chain: A Knock-On Effect.

    Directory of Open Access Journals (Sweden)

    Ana Gordoa

    Full Text Available Intentional mislabelling of seafood is a widespread problem, particularly with high-value species like tuna. In this study we examine tuna mislabelling, deliberate species substitution, types of substitution and its impact on prices. The survey covered the commercial chain, from Merca-Barna to fishmongers and restaurants in the Spanish Autonomous Community of Catalonia. To understand the geographic extent of the problem we also sampled Merca-Madrid, Europe's biggest fish market, and Merca-Málaga for its proximity to the bluefin tuna migratory route and trap fishery. Monthly surveys were carried out over one year. The results showed a high deficiency in labelling: 75% of points of sale and 83% of restaurants did not specify the species, and in those cases the name of the species had to be asked. A total of 375 samples were analysed genetically, the largest dataset gathered in Europe so far. The identified species were Thunnus albacares, Thunnus thynnus and Thunnus obesus. Species substitution began at suppliers, with 40% of observed cases, increasing to 58% at fishmongers and 62% at restaurants. The substitution was mainly on bluefin tuna (T. thynnus, 73% of cases. At restaurants, only during the bluefin fishing season, we observed a decrease of Bluefin tuna substitution and an increase of reverse substitution revealing some illegal fishing. The effect of species substitution on species prices was relevant: T. obesus increased its price by around €12 kg-1 when it was sold as bluefin. In view of the deficiency of labelling, the abuse of generic names and the lack of the bluefin catch document, we conclude that the Spanish regulations are ineffective, highlighting the need for policy execution, and the urgent need for information campaigns to Spanish consumers.

  18. 78 FR 33240 - International Fisheries; Pacific Tuna Fisheries; Fishing Restrictions in the Eastern Pacific Ocean

    Science.gov (United States)

    2013-06-04

    ..., France, Guatemala, Japan, Kiribati, the Republic of Korea, Mexico, Nicaragua, Panama, Peru, the United...-like Species in the North Pacific Ocean and the IATTC scientific staff. While Pacific bluefin tuna... Source: Highly Migratory Species Stock Assessment and Fishery Evaluation: http://www.pcouncil.org/highly...

  19. Halimeda tuna

    African Journals Online (AJOL)

    cas

    Full Length Research Paper. Evaluation of in vitro antimicrobial property of seaweed. (Halimeda tuna) from Tuticorin coast, Tamil Nadu,. Southeast coast of India. K. Indira*, S. Balakrishnan, M. Srinivasan, S. Bragadeeswaran and T. Balasubramanian. Centre of Advanced Study in Marine Biology, Faculty of Marine Sciences, ...

  20. Large-Scale Examination of Spatio-Temporal Patterns of Drifting Fish Aggregating Devices (dFADs from Tropical Tuna Fisheries of the Indian and Atlantic Oceans.

    Directory of Open Access Journals (Sweden)

    Alexandra Maufroy

    Full Text Available Since the 1990s, massive use of drifting Fish Aggregating Devices (dFADs to aggregate tropical tunas has strongly modified global purse-seine fisheries. For the first time, a large data set of GPS positions from buoys deployed by French purse-seiners to monitor dFADs is analysed to provide information on spatio-temporal patterns of dFAD use in the Atlantic and Indian Oceans during 2007-2011. First, we select among four classification methods the model that best separates "at sea" from "on board" buoy positions. A random forest model had the best performance, both in terms of the rate of false "at sea" predictions and the amount of over-segmentation of "at sea" trajectories (i.e., artificial division of trajectories into multiple, shorter pieces due to misclassification. Performance is improved via post-processing removing unrealistically short "at sea" trajectories. Results derived from the selected model enable us to identify the main areas and seasons of dFAD deployment and the spatial extent of their drift. We find that dFADs drift at sea on average for 39.5 days, with time at sea being shorter and distance travelled longer in the Indian than in the Atlantic Ocean. 9.9% of all trajectories end with a beaching event, suggesting that 1,500-2,000 may be lost onshore each year, potentially impacting sensitive habitat areas, such as the coral reefs of the Maldives, the Chagos Archipelago, and the Seychelles.

  1. Trace elements in the kidney tissue of Bluefin Tuna (Thunnus ...

    African Journals Online (AJOL)

    user

    2011-02-14

    Feb 14, 2011 ... Generally, trace elements assimilated from food or the environment, such ..... specific welfare aspects of the main systems of stunning and killing of ... Part III. U.S.. Environmental Protection Agency Report 600/3-80-092. p. 290.

  2. Trace elements in the kidney tissue of Bluefin Tuna (Thunnus ...

    African Journals Online (AJOL)

    user

    2011-02-14

    Feb 14, 2011 ... The values for the fattened fish were determined to be Pb, 0.116; Cu, 1.279; Mn, 0.208; Ni,. 0.231; Zn, 8.507; and Fe, 10.364 (μg g-1 wt wt). The comparison of trace elements between wild and fattened fish was significant (p < 0.05). In terms of gender, the mean trace elements in the kidney tissue of wild and ...

  3. DNA barcodes reveal species-specific mercury levels in tuna sushi that pose a health risk to consumers

    Science.gov (United States)

    Lowenstein, Jacob H.; Burger, Joanna; Jeitner, Christian W.; Amato, George; Kolokotronis, Sergios-Orestis; Gochfeld, Michael

    2010-01-01

    Excessive ingestion of mercury—a health hazard associated with consuming predatory fishes—damages neurological, sensory-motor and cardiovascular functioning. The mercury levels found in Bigeye Tuna (Thunnus obesus) and bluefin tuna species (Thunnus maccoyii, Thunnus orientalis, and Thunnus thynnus), exceed or approach levels permissible by Canada, the European Union, Japan, the US, and the World Health Organization. We used DNA barcodes to identify tuna sushi samples analysed for mercury and demonstrate that the ability to identify cryptic samples in the market place allows regulatory agencies to more accurately measure the risk faced by fish consumers and enact policies that better safeguard their health. PMID:20410032

  4. Habitat and behaviour of yellowfin tuna Thunnus albacares in the Gulf of Mexico determined using pop-up satellite archival tags.

    Science.gov (United States)

    Weng, K C; Stokesbury, M J W; Boustany, A M; Seitz, A C; Teo, S L H; Miller, S K; Block, B A

    2009-05-01

    This study presents the first data on movement, habitat use and behaviour for yellowfin tuna Thunnus albacares in the Atlantic Basin. Six individuals were tracked in the Gulf of Mexico using pop-up satellite archival tags. Records up to 80 days in length were obtained, providing information on depth and temperature preferences as well as horizontal movements. Thunnus albacares in the Gulf of Mexico showed a strong preference for the mixed layer and thermocline, consistent with findings for this species in other ocean basins. Fish showed a diel pattern in depth distribution, remaining in surface and mixed layer waters at night and diving to deeper waters during the day. The vertical extent of T. albacares habitat appeared to be temperature limited, with fish generally avoiding waters that were >6 degrees C cooler than surface waters. The vertical and thermal habitat usage of T. albacares differs from that of bigeye Thunnus obesus and bluefin Thunnus thynnus, Thunnus orientalis and Thunnus maccoyii tunas. These results are consistent with the results of earlier studies conducted on T. albacares in other oceans.

  5. Observed foraging behaviour of killer whales (Orcinus orca) in the northwest Atlantic

    Science.gov (United States)

    Stevens, T. S.; Lawson, J. W.; Kenney, R.

    2016-02-01

    Killer whales (Orcinus orca) in the northwest Atlantic have been observed feeding on a variety of prey types with >35 cases of confirmed consumption and >55 other interactions since 1866. They have been documented harassing, attacking, and eating minke (Balaenoptera acutorostrata) and humpback whales (Megaptera novaeangliae), dolphins, porpoises, seals, tuna, birds, and other prey. However, it remains unknown whether killer whales are prey specialists in this region. It is likely that distribution, movement, and residency patterns of killer whales are linked to those of their prey. Some killer whales appear to remain year-round in Newfoundland and Labrador (NL) and have been sighted during the spring within pack ice, potentially feeding on breeding seals. Killer whales in southern areas, such as the Gulf of Maine, are sighted less frequently and have historically been in association with Bluefin Tuna (Thunnus thynnus). A majority of successful and confirmed attacks involve minke whales in NL during the summer months, suggesting that minke whales may be one of the most important prey for killer whales in this region. Killer whales are apex predators and so detailing their foraging behaviour in the northwest Atlantic is critical for assessing their influence in this marine ecosystem.

  6. Shift in tuna catches due to ocean warming.

    Directory of Open Access Journals (Sweden)

    Alberto Monllor-Hurtado

    Full Text Available Ocean warming is already affecting global fisheries with an increasing dominance of catches of warmer water species at higher latitudes and lower catches of tropical and subtropical species in the tropics. Tuna distributions are highly conditioned by sea temperature, for this reason and their worldwide distribution, their populations may be a good indicator of the effect of climate change on global fisheries. This study shows the shift of tuna catches in subtropical latitudes on a global scale. From 1965 to 2011, the percentage of tropical tuna in longliner catches exhibited a significantly increasing trend in a study area that included subtropical regions of the Atlantic and western Pacific Oceans and partially the Indian Ocean. This may indicate a movement of tropical tuna populations toward the poles in response to ocean warming. Such an increase in the proportion of tropical tuna in the catches does not seem to be due to a shift of the target species, since the trends in Atlantic and Indian Oceans of tropical tuna catches are decreasing. Our results indicate that as populations shift towards higher latitudes the catches of these tropical species did not increase. Thus, at least in the Atlantic and Indian Oceans, tropical tuna catches have reduced in tropical areas.

  7. DRY SALTED AND SMOKED TUNA PRODUCTS. CHEMICAL, RHEOLOGICAL AND NUTRITIONAL CHARACTERISTICS

    Directory of Open Access Journals (Sweden)

    R. Mercogliano

    2013-02-01

    Full Text Available Since the presence of bluefin tuna (Thunnus thynnus is limited to some fishing areas and the species undergoes a high fishing pressure the commercial answers to this situation might be the diversification of the commercial offer. The commercial value of this species, especially in oriental market, has prompted researches aiming at fully exploiting the potential of this species through the production of innovative tuna based products. Sliceable dry salted and smoked tuna products were manufactured using whole muscles from fresh and frozen subjects. The shelf life was long enough to justify the industrial production (up to 3 months or more. No significant correlations were observed between sensory characteristics and physico-chemical parameters.

  8. ANALISIS EKSPOR IKAN TUNA INDONESIA

    Directory of Open Access Journals (Sweden)

    Indriana - Yudiarosa

    2012-05-01

    Full Text Available ABSTRACT   Facing the  free trade era, Indonesia needs to reorganize its export strategies with not mainly depending on oil and gas sector only. In relation to this, tuna as Indonesia’s export commodity has plate an important role but presently Indonesia can only contribute 7% of the world tuna supply. Being one of the country which have unused tunas potensial  up to 53,7%, Indonesia’s opportunity to supply world market is the large. This studied was aimed at analyzing; factors influencing Indonesia’s tunas export; factors  influencing domestic supply of tunas; predicting tunas export in the next 5 years (2000 –2005 and study marketing strategies that effect Indonesia’s export of tuna. To analyze factors that influenced tunas export and domestic supply of tunas, simultan equation in the form of double logarithma with two stage least square (2SLS methods were used. Meanwhile, export development were analyzed with trend analysis and tunas export strategies with SWOT analysis. Result of this study showed that, tunas export price,  tunas export  tax, exchange rate and tunas export the previous year effected tunas export.Factors that influenced domestic tuna supplies were domestic prices of tunas and domestic supplies of tunas the previous year.       Tunas export prediction from 2000 – 2005 drawn from the trend analysis; shows an increase in export by average of 1.06%. Hopefully this will be followed by increase in tunas production by an average of 1.27%. Increase in tunas export must be supported by marketing strategies.Marketing strategies that can be carried out based on the SWOT analysis are improving infrastucture, transfer of technology for fleet and catch material, improvement in the quality and quantity of the product , marketing research and upgrading cooperation with importing countries.   Keywords: tuna fish, export

  9. Comparative ecology of widely distributed pelagic fish species in the North Atlantic: Implications for modelling climate and fisheries impacts

    Science.gov (United States)

    Trenkel, V. M.; Huse, G.; MacKenzie, B. R.; Alvarez, P.; Arrizabalaga, H.; Castonguay, M.; Goñi, N.; Grégoire, F.; Hátún, H.; Jansen, T.; Jacobsen, J. A.; Lehodey, P.; Lutcavage, M.; Mariani, P.; Melvin, G. D.; Neilson, J. D.; Nøttestad, L.; Óskarsson, G. J.; Payne, M. R.; Richardson, D. E.; Senina, I.; Speirs, D. C.

    2014-12-01

    This paper reviews the current knowledge on the ecology of widely distributed pelagic fish stocks in the North Atlantic basin with emphasis on their role in the food web and the factors determining their relationship with the environment. We consider herring (Clupea harengus), mackerel (Scomber scombrus), capelin (Mallotus villosus), blue whiting (Micromesistius poutassou), and horse mackerel (Trachurus trachurus), which have distributions extending beyond the continental shelf and predominantly occur on both sides of the North Atlantic. We also include albacore (Thunnus alalunga), bluefin tuna (Thunnus thynnus), swordfish (Xiphias gladius), and blue marlin (Makaira nigricans), which, by contrast, show large-scale migrations at the basin scale. We focus on the links between life history processes and the environment, horizontal and vertical distribution, spatial structure and trophic role. Many of these species carry out extensive migrations from spawning grounds to nursery and feeding areas. Large oceanographic features such as the North Atlantic subpolar gyre play an important role in determining spatial distributions and driving variations in stock size. Given the large biomasses of especially the smaller species considered here, these stocks can exert significant top-down pressures on the food web and are important in supporting higher trophic levels. The review reveals commonalities and differences between the ecology of widely distributed pelagic fish in the NE and NW Atlantic basins, identifies knowledge gaps and modelling needs that the EURO-BASIN project attempts to address.

  10. A validated methodology for genetic identification of tuna species (genus Thunnus.

    Directory of Open Access Journals (Sweden)

    Jordi Viñas

    Full Text Available BACKGROUND: Tuna species of the genus Thunnus, such as the bluefin tunas, are some of the most important and yet most endangered trade fish in the world. Identification of these species in traded forms, however, may be difficult depending on the presentation of the products, which may hamper conservation efforts on trade control. In this paper, we validated a genetic methodology that can fully distinguish between the eight Thunnus species from any kind of processed tissue. METHODOLOGY: After testing several genetic markers, a complete discrimination of the eight tuna species was achieved using Forensically Informative Nucleotide Sequencing based primarily on the sequence variability of the hypervariable genetic marker mitochondrial DNA control region (mtDNA CR, followed, in some specific cases, by a second validation by a nuclear marker rDNA first internal transcribed spacer (ITS1. This methodology was able to distinguish all tuna species, including those belonging to the subgenus Neothunnus that are very closely related, and in consequence can not be differentiated with other genetic markers of lower variability. This methodology also took into consideration the presence of introgression that has been reported in past studies between T. thynnus, T. orientalis and T. alalunga. Finally, we applied the methodology to cross-check the species identity of 26 processed tuna samples. CONCLUSIONS: Using the combination of two genetic markers, one mitochondrial and another nuclear, allows a full discrimination between all eight tuna species. Unexpectedly, the genetic marker traditionally used for DNA barcoding, cytochrome oxidase 1, could not differentiate all species, thus its use as a genetic marker for tuna species identification is questioned.

  11. 76 FR 53401 - Submission for OMB Review; Comment Request

    Science.gov (United States)

    2011-08-26

    ... anglers for large pelagic fish (tunas, sharks, and billfish) in the Atlantic Ocean. The survey provides the National Marine Fisheries Service (NMFS) with information to monitor catch of bluefin tuna, marlin... effort statistics for all pelagic fish is required under the Atlantic Tunas Convention Act and the...

  12. 76 FR 12340 - Proposed Information Collection; Comment Request; Large Pelagic Fishing Survey

    Science.gov (United States)

    2011-03-07

    ... surveys of recreational anglers for large pelagic fish (tunas, sharks, and billfish) in the Atlantic Ocean... bluefin tuna, marlin and other federally-managed species. Catch monitoring in these fisheries and collection of catch and effort statistics for all pelagic fish is required under the Atlantic Tunas...

  13. Identification of tuna species in commercial cans by minor groove binder probe real-time polymerase chain reaction analysis of mitochondrial DNA sequences.

    Science.gov (United States)

    Terio, Valentina; Di Pinto, Pietro; Decaro, Nicola; Parisi, Antonio; Desario, Costantina; Martella, Vito; Buonavoglia, Canio; Tantillo, Marilia Giuseppina

    2010-12-01

    Three different minor groove binder (MGB) probe assays have been developed for rapid and accurate identification of the species commonly used for production of canned tuna, i.e. yellowfin (Thunnus albacares), bluefin (Thunnus thynnus) and albacore (Thunnus alalunga) tunas. The assays targeting the mitochondrial cytochrome b gene were able to discriminate efficiently between the three species contained in fresh or canned tunas and did not react with other Scombroidei that were tested. A correct species prediction was obtained even from artificial mixtures prepared with different amounts of the reference tuna species and subjected to the sterilisation treatment. Testing of 27 commercial canned tunas by PCR-RFLP, MGB probe assays and sequence analysis showed a concordance of 100% between the last two techniques, whereas by using PCR-RFLP several samples were uncharacterised or mischaracterised. These results make the established MGB probe assays an attractive tool for direct and rapid species identification in canned tuna. Copyright © 2010 Elsevier Ltd. All rights reserved.

  14. 77 FR 4282 - Atlantic Highly Migratory Species; Meeting of the Atlantic Highly Migratory Species Advisory Panel

    Science.gov (United States)

    2012-01-27

    ... tuna management; revitalizing the swordfish fishery; shark management measures such as rebuilding scalloped hammerhead, dusky, and blacknose sharks and catch shares; and items contained in the Advanced... FMP amendments for Atlantic tunas, swordfish, billfish, and sharks. The AP has previously consulted...

  15. Effect of electrolyzed seawater treatment on the hatching rate of Pacific bluefin tuna Thunnus orientalis eggs

    National Research Council Canada - National Science Library

    樋口, 健太郎; 小西, 淳平; 高志, 利宣; 田中, 庸介; 鈴木, 絢子; 辻田, 明子; 澤口, 小有美; 玄, 浩一郎; 岡, 雅一; 虫明, 敬一

    2015-01-01

    電解海水によるクロマグロ受精卵の消毒法を開発する第1段階として,電解海水処理時の卵発生段階(4細胞期,桑実胚期,嚢胚期,5体節期,心臓拍動期,ふ化1時間前)および残留塩素濃度(0.0,0.5,1.0,1.5 mg /...

  16. Global trophic ecology of yellowfin, bigeye, and albacore tunas: Understanding predation on micronekton communities at ocean-basin scales

    Science.gov (United States)

    Duffy, Leanne M.; Kuhnert, Petra M.; Pethybridge, Heidi R.; Young, Jock W.; Olson, Robert J.; Logan, John M.; Goñi, Nicolas; Romanov, Evgeny; Allain, Valerie; Staudinger, Michelle D.; Abecassis, Melanie; Choy, C. Anela; Hobday, Alistair J.; Simier, Monique; Galván-Magaña, Felipe; Potier, Michel; Ménard, Frederic

    2017-06-01

    Predator-prey interactions for three commercially valuable tuna species: yellowfin (Thunnus albacares), bigeye (T. obesus), and albacore (T. alalunga), collected over a 40-year period from the Pacific, Indian, and Atlantic Oceans, were used to quantitatively assess broad, macro-scale trophic patterns in pelagic ecosystems. Analysis of over 14,000 tuna stomachs, using a modified classification tree approach, revealed for the first time the global expanse of pelagic predatory fish diet and global patterns of micronekton diversity. Ommastrephid squids were consistently one of the top prey groups by weight across all tuna species and in most ocean bodies. Interspecific differences in prey were apparent, with epipelagic scombrid and mesopelagic paralepidid fishes globally important for yellowfin and bigeye tunas, respectively, while vertically-migrating euphausiid crustaceans were important for albacore tuna in the Atlantic and Pacific Oceans. Diet diversity showed global and regional patterns among tuna species. In the central and western Pacific Ocean, characterized by low productivity, a high diversity of micronekton prey was detected while low prey diversity was evident in highly productive coastal waters where upwelling occurs. Spatial patterns of diet diversity were most variable in yellowfin and bigeye tunas while a latitudinal diversity gradient was observed with lower diversity in temperate regions for albacore tuna. Sea-surface temperature was a reasonable predictor of the diets of yellowfin and bigeye tunas, whereas chlorophyll-a was the best environmental predictor of albacore diet. These results suggest that the ongoing expansion of warmer, less productive waters in the world's oceans may alter foraging opportunities for tunas due to regional changes in prey abundances and compositions.

  17. Governance innovation networks for sustainable tuna

    NARCIS (Netherlands)

    Miller, A.M.M.

    2014-01-01

    Governance Innovation Networks for Sustainable Tuna Alice M.M. Miller Tuna fisheries are among the most highly capitalised and valuable fisheries in the world and their exploitation will continue for the foreseeable future. This means the sustainability of tuna stocks is a pressing

  18. Aleksander Loit - Tuna laureaat 2010

    Index Scriptorium Estoniae

    2010-01-01

    "Tuna" seitsmendast artklipreemiast. Esimest korda läks preemia väljapoole Eestit. Preemia vääriliseks osutus Aleksander Loidi artikkel "Appihüüd põrgust. Ümberpiiratud Tallinna viimased päevad Rootsi võimu all 2010"

  19. Aasta esimene Tuna / Vello Helk

    Index Scriptorium Estoniae

    Helk, Vello, 1923-2014

    2009-01-01

    ajakiri Tuna, 2009, nr. 1 sisust: Mait Kõivu Trooja sõja aineline essee, Tiina Kala Saare-Lääne piiskopi Johannes Kiveli ametissepühitsemine 1515. aastal, Jaan Rossi artikkel teadlaste panusest muusikasse, Riho Saardi Eesti Kirikute Nõukogu sünnilugu, Vello Salo 1924. aasta 1. detsembri lööksalkade juhtkonnast

  20. Towards better management of Coral Triangle tuna

    NARCIS (Netherlands)

    Bailey, M.L.; Flores, J.; Pokajam, S.; Rashid Sumaila, U.

    2012-01-01

    Indonesia, the Philippines, and Papua New Guinea, all part of a regional sub-group known as the Coral Triangle, have sizeable skipjack, yellowfin and bigeye tuna fisheries. Recent figures suggest that as much as a third of tuna catch from the western and central Pacific Ocean can be attributed to

  1. 78 FR 70015 - Proposed Information Collection; Comment Request; Large Pelagic Fishing Survey

    Science.gov (United States)

    2013-11-22

    ... telephone surveys of recreational anglers for large pelagic fish (tunas, sharks, and billfish) in the... monitor catch of bluefin tuna, marlin and other federally managed species. Catch monitoring in these fisheries and collection of catch and effort statistics for all pelagic fish is required under the Atlantic...

  2. 78 FR 65887 - International Fisheries; Pacific Tuna Fisheries; 2013 Bigeye Tuna Longline Fishery Closure in the...

    Science.gov (United States)

    2013-11-04

    ... National Oceanic and Atmospheric Administration 50 CFR Part 300 RIN 0648-XC922 International Fisheries; Pacific Tuna Fisheries; 2013 Bigeye Tuna Longline Fishery Closure in the Eastern Pacific Ocean AGENCY: National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA), Commerce...

  3. 78 FR 44095 - Atlantic Highly Migratory Species; Meeting of the Atlantic Highly Migratory Species Advisory Panel

    Science.gov (United States)

    2013-07-23

    ...; shark management measures regarding rebuilding scalloped hammerhead and blacknose sharks (Amendment 5a), rebuilding dusky sharks (Amendment 5b), and shark catch shares (Amendment 6); and swordfish management... Atlantic tunas, swordfish, billfish, and sharks. The AP has previously consulted with NMFS on: Amendment 1...

  4. DYNAMIC LINKAGES BETWEEN PRICES AND IMPORTS FOR JAPANESE FROZEN TUNA

    OpenAIRE

    Lei, Li-Fen; Sun, Lih-Chyun; Liu, His-Chiang

    1998-01-01

    VAR models have been used to describe the dynamic relationships among market price, Japanese harvest, import-from-Taiwan, and import-from-Korea for frozen Big-Eye tuna and Yellow-Fin tuna markets in Japan. It is found that tuna imports from South Korea exert more significant effects on Japan market prices than import-from-Taiwan.

  5. The Tuna Lexicon, a Mediterranean Sociocultural Creation

    Directory of Open Access Journals (Sweden)

    Francesc Xavier Llorca Ibi

    2017-08-01

    Full Text Available The tuna lexicon is a slang created by professionals involved in the process of catching and processing tuna fish. This social work-related group, made up of humble communities, has historically faced discrimination from other social strata, a factor which has contributed to the construction of their own lexicon. Another significant contribution in the configuration of trap-netting words has come from groups of migrant fishermen who speak different languages, which also distinguishes these professionals from other speakers. Thus, the study of the terms that make up this lexicon, and of its social and historical context, will allow us to visualize the relationships of cooperation and cultural, technological, economic and linguistic intervention made by some communities in others, making the tuna lexicon a symbol of Mediterranean culture.

  6. Scombroid Poisoning from Canned Tuna Ingestion

    Directory of Open Access Journals (Sweden)

    Thanjira Jiranantakan

    2017-07-01

    Full Text Available Fish allergy is well recognized, however scombroid poisoning or histamine fish poisoning, which exhibits identical clinical manifestations, is rarely diagnosed. We report the case of a 28-year-old female who, after eating tuna spaghetti, experienced a flushed face, generalized erythema, angioedema, shock and tachypnea requiring adrenaline, chlorpheniramine, ranitidine, and hydrocortisone injections. Her symptoms completely resolved within 3 hours. Her condition was diagnosed as scombroid poisoning based on temporality, normal serum tryptase levels (2.7 ng/mL at 2.5 hours and at her baseline (2.5 ng/mL, 60 hours, as well as negative results on skin-prick test and re-challenging one can of the same branded-tuna orally. The revelant public health authorities were notified and a restaurant-visit was made, although the tuna can from which the patient’s dish was prepared had been discarded, hence a histamine analysis of the tuna was unavailable. This case underscores the need for awareness of scombroid poisoning and public interventions regarding food safety.

  7. Kounis syndrome following canned tuna fish ingestion.

    Science.gov (United States)

    De Gennaro, Luisa; Brunetti, Natale Daniele; Locuratolo, Nicola; Ruggiero, Massimo; Resta, Manuela; Diaferia, Giuseppe; Rana, Michele; Caldarola, Pasquale

    2017-04-01

    Kounis syndrome (KS) is a complex of cardiovascular symptoms and signs following either allergy or hypersensitivity and anaphylactic or anaphylactoid insults. We report the case of 57-year-old man, with hypertension and history of allergy, referred for facial rash and palpitations appeared after consumption of canned tuna fish. Suddenly, the patient collapsed: electrocardiogram showed ST-elevation in inferior leads. The patient was transferred from the spoke emergency room for coronary angio, which did not show any sign of coronary atherosclerosis. A transient coronary spasm was therefore hypothesized and the final diagnosis was KS. To the best of our knowledge, this is one of the first cases of KS following the ingestion of tuna fish. KS secondary to food allergy has also been reported, and shellfish ingestion has been considered as one of the most active KS inducer foods. Canned tuna fish too is well known as an allergy inducer. Tuna fish allergy should be considered, however, within the context of scombroid food poisoning, also called histamine fish poisoning. Fish with high levels of free histidine, the enzyme substrate converted to histamine by bacterial histidine decarboxylase, are those most often implicated in scombroid poisoning. Inflammatory mediators such as histamine constitute the pathophysiologic basis of Kounis hypersensitivity-associated acute coronary syndrome. Patients with coronary risk factors, allergic reaction after food ingestion, and suspected scombroid poisoning should be therefore carefully monitored for a prompt diagnosis of possible coronary complications.

  8. 78 FR 68757 - Atlantic Highly Migratory Species; Vessel Monitoring Systems

    Science.gov (United States)

    2013-11-15

    ... regarding the alternatives considered and a brief summary of the recent management history. Those details... available from Cliff Hutt and Karyl Brewster-Geisz, Highly Migratory Species (HMS) Management Division... and Management Act (MSA) and the Atlantic Tunas Conservation Act (ATCA). Under the MSA, management...

  9. Dynamic optimal foraging theory explains vertical migrations of bigeye tuna

    DEFF Research Database (Denmark)

    Thygesen, Uffe Høgsbro; Sommer, Lene; Evans, Karen

    2016-01-01

    Bigeye tuna are known for remarkable daytime vertical migrations between deep water, where food is abundant but the water is cold, and the surface, where water is warm but food is relatively scarce. Here we investigate if these dive patterns can be explained by dynamic optimal foraging theory......, where the tuna maximizes its energy harvest rate. We assume that foraging efficiency increases with body temperature, so that the vertical migrations are thermoregulatory. The tuna's state is characterized by its mean body temperature and depth, and we solve the optimization problem numerically using...... dynamic programming. With little calibration of model parameters, our results are consistent with observed data on vertical movement: we find that small tuna should display constant-depth strategies while large tuna should display vertical migrations. The analysis supports the hypothesis that the tuna...

  10. KEBIJAKAN PENGELOLAAN HASIL TANGKAPAN SAMPINGAN TUNA LONGLINE DI SAMUDERA HINDIA

    Directory of Open Access Journals (Sweden)

    Budi Nugraha

    2013-11-01

    Full Text Available Tuna longline atau rawai tuna merupakan salah satu alat tangkap yang sangat efektif untuk menangkap tuna. Selain efektif alat tangkap ini juga merupakan alat tangkap yang selektif terhadap hasil tangkapannya. Namun demikian, alat tangkap ini masih menimbulkan suatu masalah dimana ikan hasil tangkapan yang diperoleh tidak semuanya merupakan hasil tangkapan utama (target species, ada sebagian yang merupakan hasil tangkapan sampingan (by-catch. Sebagian besar hasil tangkapan sampingan tuna longline memiliki nilai ekonomis, hanya jenis pari lumpur dan ikan naga yang tidak memiliki nilai ekonomis. Namun demikian, justru yang tidak memiliki nilai ekonomis mendominasi hasil tangkapan sampingan pada perikanan tuna longline. Oleh karena itu perlu adanya tindak lanjut dengan menyusun peraturan atau regulasi yang terkait dengan pengelolaan ikan hasil tangkapan sampingan dan pengelolaan yang benar terhadap hasil tangkapan tersebut beserta habitatnya agar terjaga kelestarian sumberdayanya dan juga tetap menjadi sumber pendapatan masyarakat.Tulisan ini membahas secara ringkas tentang isu hasil tangkapan sampingan pada perikanan tuna longline, komposisi jenisnya, pemanfaatannya dan kebijakannya. Tuna longline is one of the most effective fishing gears to catch tuna. In addition, this fishing gear is selective to catch tuna. However, this gear is still causing a problem where some species other than their target species were caught as by-catch. Most of by-catch species from the tuna longliners have an economic value, except pelagic stingrays and lancetfish. In fact, these by-catch species (non economical-valued species dominated the longline catch. Therefore, it is needed to develop rules or regulations related to the management of the fish by-products, and properly manage the fishing activities on these by-catch species and habitat preservation to preserve its resources and also remain as a source of income. This paper briefly discusses the issue of by

  11. 75 FR 57431 - Listing Endangered and Threatened Wildlife and Plants; 90-Day Finding on a Petition to List...

    Science.gov (United States)

    2010-09-21

    .... The ESA defines an endangered species as ``any species which is in danger of extinction throughout all... animals and plants. They are threatened with extinction, and CITES prohibits the international trade in...). CBD asserts that the western Atlantic bluefin tuna population is also in imminent danger of extinction...

  12. Biology, fishery, conservation and management of Indian Ocean tuna fisheries

    Science.gov (United States)

    Gopalakrishna Pillai, N.; Satheeshkumar, Palanisamy

    2012-12-01

    The focus of the study is to explore the recent trend of the world tuna fishery with special reference to the Indian Ocean tuna fisheries and its conservation and sustainable management. In the Indian Ocean, tuna catches have increased rapidly from about 179959 t in 1980 to about 832246 t in 1995. They have continued to increase up to 2005; the catch that year was 1201465 t, forming about 26% of the world catch. Since 2006 onwards there has been a decline in the volume of catches and in 2008 the catch was only 913625 t. The Principal species caught in the Indian Ocean are skipjack and yellowfin. Western Indian Ocean contributed 78.2% and eastern Indian Ocean 21.8% of the total tuna production from the Indian Ocean. The Indian Ocean stock is currently overfished and IOTC has made some recommendations for management regulations aimed at sustaining the tuna stock. Fishing operations can cause ecological impacts of different types: by catches, damage of the habitat, mortalities caused by lost or discarded gear, pollution, generation of marine debris, etc. Periodic reassessment of the tuna potential is also required with adequate inputs from exploratory surveys as well as commercial landings and this may prevent any unsustainable trends in the development of the tuna fishing industry in the Indian Ocean.

  13. Atlantic Blue Marlin, Makaira nigricans, and White Marlin, Tetrapterus albidus, Bycatch of the Japanese Pelagic Longline Fishery, 1960–2000

    OpenAIRE

    Serafy, Joseph E.; Diaz, Guillermo A.; Prince, Eric D.; Orbesen, Eric S.; Legault, Christopher M.

    2004-01-01

    ABSTRACT—Since the late 1950’s, a multi-national longline fishery has operated throughout the Atlantic Ocean to supply the growing global demand for tunas (Scombridae) and swordfish, Xiphias gladius. Two species caught as bycatch include Atlantic blue marlin, Makaira nigricans, and white marlin, Tetrapterus albidus, referred to in this paper as “Atlantic marlin.” Pelagic longlining has consistently been the principal source of adult mortality for both species, which are currently depleted ...

  14. Exploring future scenarios for the global supply chain of tuna

    Science.gov (United States)

    Mullon, C.; Guillotreau, P.; Galbraith, E. D.; Fortilus, J.; Chaboud, C.; Bopp, L.; Aumont, O.; Kaplan, D.

    2017-06-01

    The abundance of tuna, an important top predator that ranges throughout tropical and subtropical oceans, is now largely determined by fishing activity. Fishing activity, in turn, is determined by the interaction of fish availability, fishing capacity, fishing costs and global markets for tuna products. In the face of overfishing, the continued sustainable supply of tuna is likely to require improved global governance, that would benefit from modeling frameworks capable of integrating market forces with the availability of fish in order to consider alternative future projections. Here we describe such a modeling framework, in which we develop several simple, contrasting scenarios for the development of the tuna supply chain in order to illustrate the utility of the approach for global evaluation of management strategies for tuna and other complex, stock-structured fisheries. The model includes multiple national and multi-national fishing fleets, canneries and fresh/frozen markets, and connects these to global consumers using a network of flows. The model is calibrated using recent data on fish catch, cannery and fresh/frozen production, and consumption. Scenarios explore the control on future outcomes in the global tuna fishery by representing, in a simple way, the effects of (1) climate change, (2) changes in the global demand for tuna, and (3) changes in the access to fishing grounds (marine reserves). The results emphasize the potential importance of increasing demand in provoking a global collapse, and suggest that controlling tuna production by limiting technical efficiency is a potential countermeasure. Finally we discuss the outcomes in terms of potential extensions of the scenario approach allowed by this global network model of the tuna supply chain.

  15. Characterization of Fish Skin Gelatin Yellowfin Tuna

    Directory of Open Access Journals (Sweden)

    Mala Nurilmala

    2017-08-01

    Full Text Available Gelatin is one of the products which become a necessity for various industries, i.e. food and non-food industries. The application of gelatin has been increasing year by year in Indonesia. However, there is nogelatin industry in Indonesia so far. Thus, it is necessary to find an alternative source of gelatin, especially from fishery by products.Thus, the purpose of this research was to extract fish skin gelatin of yellowfin tuna with temperature treatments (55, 65 and 75oC. In addition, the properties of resulted gelatin were determined including yield, pH, gel strength, viscosity, functional groups, molecular weight profiles, and amino acid composition. The extraction at 75oC was chosen as the best result. The yield was 17%; pH 5.3; gel strength 1789.55 gf, viscosity 104.2 Cp, respectively. There was functional group amide A, I, II, dan III. SDS-PAGE showed β, α1 dan α2 bands for tuna skin gelatin. In addition, the main amino acids were glycine and proline.

  16. Tuna Cannery Points, Tutuila AS, 2007, US EPA Region 9

    Data.gov (United States)

    U.S. Environmental Protection Agency — American Samoa's primary industry is tuna processing by the Samoa Packing Co., user of the "Chicken of the Sea" label, and StarKist Samoa. Canneries thrive in this...

  17. 77 FR 50470 - Proposed Information Collection; Comment Request; Atlantic Highly Migratory Species Recreational...

    Science.gov (United States)

    2012-08-21

    ... (or via the Internet at [email protected] ). FOR FURTHER INFORMATION CONTACT: Requests for additional... provides real-time catch information used to monitor the ] recreational BFT fishery. Under the Atlantic Tunas Convention Act of 1975 (ATCA, 16 U.S.C. 971), the United States is required to adopt regulations...

  18. Etiologi Penyebab Malformasi Tunas Ranting Kakao di Kulonprogo, DIY dan Segayung, Jawa Tengah

    Directory of Open Access Journals (Sweden)

    Susamto Somowiyarjo

    2014-12-01

    insektisida hasilnya tunas muda yang tumbuh berikutnya tidak menunjukan adanya gejala malformasi. Diduga bahwa malformasi pada tunas dan ranting tersebut disebabkan oleh racun yang ditularkan oleh serangga. Penelitian lebih lanjut untuk karakterisasi penyebab penyakit secara molekuler saat ini sedang dilakukan.

  19. Studies on thermal processing of Tuna-A comparative study in tin ...

    African Journals Online (AJOL)

    Tin-free steel can is an ideal alternative to open top sanitary tin cans (OTS) for thermal processing of little tuna (Ethynnus affinis) in curry used as filling media. Effect of heat penetration on physical, biochemical and sensory characteristics of canned tuna product were studied. The chemical analysis of raw tuna fish showed a ...

  20. 50 CFR 216.95 - Official mark for “Dolphin-safe” tuna products.

    Science.gov (United States)

    2010-10-01

    ... 50 Wildlife and Fisheries 7 2010-10-01 2010-10-01 false Official mark for âDolphin-safeâ tuna... AND IMPORTING OF MARINE MAMMALS Dolphin Safe Tuna Labeling § 216.95 Official mark for “Dolphin-safe... Department of Commerce that may be used to label tuna products that meet the “dolphin-safe” standards set...

  1. 78 FR 2273 - Canned Tuna Deviating From Identity Standard; Temporary Permit for Market Testing

    Science.gov (United States)

    2013-01-10

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF HEALTH AND... in accordance with the standard; (2) adding seasoning and flavoring ingredients (i.e., lemon juice... Albacore Tuna,'' ''Solid Light Tuna Thai Chili,'' and ``Solid Light Tuna Lemon Pepper.'' The information...

  2. Vocalisation Repertoire of Female Bluefin Gurnard (Chelidonichthys kumu in Captivity: Sound Structure, Context and Vocal Activity.

    Directory of Open Access Journals (Sweden)

    Craig A Radford

    Full Text Available Fish vocalisation is often a major component of underwater soundscapes. Therefore, interpretation of these soundscapes requires an understanding of the vocalisation characteristics of common soniferous fish species. This study of captive female bluefin gurnard, Chelidonichthys kumu, aims to formally characterise their vocalisation sounds and daily pattern of sound production. Four types of sound were produced and characterised, twice as many as previously reported in this species. These sounds fit two aural categories; grunt and growl, the mean peak frequencies for which ranged between 129 to 215 Hz. This species vocalized throughout the 24 hour period at an average rate of (18.5 ± 2.0 sounds fish-1 h-1 with an increase in vocalization rate at dawn and dusk. Competitive feeding did not elevate vocalisation as has been found in other gurnard species. Bluefin gurnard are common in coastal waters of New Zealand, Australia and Japan and, given their vocalization rate, are likely to be significant contributors to ambient underwater soundscape in these areas.

  3. DISCARDS OF THE INDONESIAN TUNA LONGLINE FISHERY IN INDIAN OCEAN

    Directory of Open Access Journals (Sweden)

    Bram Setyadji

    2013-06-01

    Full Text Available Incidental by-catch and associated discarding are difficult to estimate on the basis of logbook information because they are poorly reported by fishing masters and their importance varies with several interrelated factors. The purpose of this paper is to inform the commonly discarded fishes of the Indonesian tuna longline fishery in the Indian Ocean. The study was carried out during 2010 – 2011 following six commercial tuna longline vessels based in Port of Benoa. Discards composition was dominated by longnose lancetfish and pelagic stingrays which composed almost half of total discards. Almost half of total catch are discards and half of discards are disposed dead or dying.

  4. The New WTO Tuna Dolphin Decision: Reconciling Trade and Environment?

    OpenAIRE

    Jakir, Vanda

    2013-01-01

    The WTO is often criticised for consistently refusing to accept the environmental measures of its Members due to their adverse impacts on international trade. The aim of this paper is to examine the recent developments in WTO law considering this clash between liberal trade and environmental protection. The analysis is based on the most recent US – Tuna II (Mexico)1 case, the third in the Tuna Dolphin line of case law. The paper shows that the Appellate Body still greatly favours free trade o...

  5. STOMACH CONTENT OF THREE TUNA SPECIES IN THE EASTERN INDIAN OCEAN

    Directory of Open Access Journals (Sweden)

    Bram Setyadji

    2012-12-01

    Full Text Available Feeding habit of tuna in Indian Ocean has been described around Sri Lanka, Indian Waters, Andaman Sea, western Indian Ocean (Seychelles Islands, western equatorial Indian Ocean whereas the tunas feeding habit study in Eastern Indian Oceanis merely in existence. The purpose of this study is to investigate the stomach content of three tuna species (bigeye tuna, yellowfin tuna, and skipjack tuna, apex predator in the southern part of Eastern Indian Ocean. The study was conducted in March – April, 2010 on the basis of catches of commercial tuna longline vessel based in Port of Benoa. A total of 53 individual fishes were collected, consisting of bigeye tuna (Thunnus obesus, yellowfin tuna (Thunnus albacores, and skipjack tuna (Katsuwonus pelamis. Stomach specimens were collected and analyzed.Analysis was conducted on the basis of index of preponderance method. The diet of the three tuna species showed fishes as the main diet (56–82%, followed by cephalopods (squids as the complementary diet (0–8%, and crustaceans (shrimps as the additional diet (2–4%. Fish prey composed of 6 families i.e. Alepisauridae, Bramidae, Carangidae, Clupeidae, Engraulidae, and Scombridae.

  6. Assessment of trophic dynamics of cephalopods and large pelagic fishes in the central North Atlantic Ocean using stable isotope analysis

    Science.gov (United States)

    Logan, John M.; Lutcavage, Molly E.

    2013-10-01

    Pelagic ecosystems in the central North Atlantic Ocean support numerous commercially-exploited tuna, shark, and billfish species, which rely largely on cephalopod as well as fish and crustacean prey. Carbon and nitrogen stable isotope analyses were performed on tuna and billfish predators as well as cephalopod prey species sampled during two research longline cruises (2001-02) to study their trophic structure. Nitrogen stable isotope (δ15N) analyses revealed similarity in trophic position (TP) among sampled fish predator species, with large swordfish occupying the highest TP. Species with wider vertical distributions (swordfish and bigeye tuna) had higher δ15N values than species more constrained to the epipelagic zone (yellowfin tuna and dolphinfish). Analysis of tissue nitrogen isotope values showed an ontogenetic increase for swordfish and white marlin but no effects for other sampled fish species. For cephalopods as a group, δ15N increased with size. Smaller cephalopods sampled in this study had δ15N values that were about one TP below co-occurring tunas and billfishes, confirming their importance as a prey resource. Larger cephalopods had similar δ15N values to tunas and billfishes, indicating that these large cephalopods occupy a comparable TP to their fish predators. Both carbon and nitrogen stable isotope values of large pelagic fishes showed spatial gradients relative to conspecifics analyzed in coastal regions, which can be used to trace large scale movements.

  7. DISKRIMINASI KELAMIN PADA IKAN TUNA SIRIP KUNING, Yellowfin tuna MENGGUNAKAN ANALISIS DOT BLOT DAN ELISA

    Directory of Open Access Journals (Sweden)

    Gusti Ngurah Permana

    2014-08-01

    Full Text Available Pemahaman tentang penentuan jenis kelamin dalam populasi induk merupakan hal yang sangat penting bagi keberhasilan program pembenihan. Pengukuran reaksi antibodi dan aktivitas hormon testosterone, serta estradiol adalah metode dengan potensi yang secara akurat dapat menentukan jenis kelamin ikan tanpa mematikan ikan. Tujuan penelitian ini adalah untuk mengetahui akurasi metode dot blot dan ELISA dengan 11-ketotestorsterone (11-KT yang tersedia secara komersial EIA-kit untuk membedakan jenis kelamin ikan tuna sirip kuning. Hasil analisis menunjukkan bahwa metode dot blot menghasilkan ekspresi vitelogenin tampak jelas pada individu betina dan efek plasma terlihat transparan, jika dibandingkan dengan individu jantan. Interpretasi dari metode ini memerlukan pengalaman dan keahlian dalam akurasi pembacaan hasil. Aktivitas hormon 11-KT dengan sampel klip sirip dan plasma memberikan hasil yang baik dengan aktivitas hormon terlihat jelas.

  8. Private provision of public information in tuna fisheries

    NARCIS (Netherlands)

    Bush, Simon R.; Bailey, Megan; Zwieten, van Paul; Kochen, Momo; Wiryawan, Budy; Doddema, Mandy; Mangunsong, Stephani C.

    2017-01-01

    Private enumeration of landings data and traceability is an emerging phenomena in developing world tuna fisheries. The general goal of these systems is to facilitate compliance with mandatory market requirements such as the European Union’s Illegal, Unreported and Unregulated fisheries regulation,

  9. Optimization of peptide production by enzymatic hydrolysis of tuna ...

    African Journals Online (AJOL)

    Optimization of peptide production by enzymatic hydrolysis of tuna dark muscle by-product using commercial proteases. ... The PDF file you selected should load here if your Web browser has a PDF reader plug-in installed (for example, a recent version of Adobe Acrobat Reader). If you would like more information about ...

  10. Penanganan penyu yang tertangkap rawai tuna di Samudera Hindia

    Directory of Open Access Journals (Sweden)

    Budi Nugraha

    2017-03-01

    Full Text Available Turtle is one of the vulnerable of megafauna and as a by-catch in tuna longline fisheries, however, management practices have not been done yet. This paper described the efforts to avoid the capture of turtles on the tuna longline fishery and its handling recommendation. It has been written based on the research results and observer programs of activities that have been implemented since 2005. It’s also including a literature review rules and regulations regarding the management of sea turtles. The record results during 2005 - 2014 conducted by an independent scientific board on tuna longline in the Indian Ocean with 72 times number of setting and 89,441number of hooks. There are 105 turtles caught, which are leatherback, olive ridley turtles, hawksbill, loggerhead sea turtles as well as the unknown green turtle where the current status of turtles in the Indian Ocean is in a state of vulnerable, endangered, critically even endangered. The olive ridley turtle, loggerhead and leatherback turtles are in a vulnerable status. While, the green turtles are in a state endangered and even hawksbill in a state extremely endangered. Policy measures for handling of turtles in tuna longline fishery needs to be taken in order to be implemented include the socialization of the use of intensified circle hooks and if necessary the government issued regulations regarding the use of circle hooks, the implementation of the placement of fishing monitoring (observer aboard the tuna longline in order to assist the skippers monitoring the catch of turtles and turtle handling training for the skippers and crew in order to hold the caught turtles can be handled directly on the boat to reduce the mortality turtles which can be released back into the sea alive. Penyu merupakan salah satu biota yang rawan punah dan sebagai hasil tangkapan sampingan pada perikanan rawai tuna dimana pengelolaannya belum banyak dilakukan. Makalah ini membahas tentang upaya bagaimana

  11. Development of functional canned and pouched tuna products added inulin for commercial production.

    Science.gov (United States)

    Rueangwatcharin, U; Wichienchot, S

    2015-08-01

    Four formulas of canned tuna in spring water and tuna in mayonnaise and pouched tuna in salad cream and tuna in thousand island cream with added inulin were developed for commercial production. The effects of the addition of a prebiotic (inulin, Orafti®-HP) on the color and sensory properties of these products were studied. For inulin concentrations studied (3, 5, 7 and 10 %, w/w) caused more intensed yellow and red colors. Hedonic sensory values of tuna packed in spring water and in mayonnaise showed no significant differences (p > 0.05) among products with different inulin addition levels (3, 5, 7 and 10 %, w/w) in terms of color, flavor, sweetness and overall characteristics. However, when packed in thousand island cream, significant differences (p thousand island and tuna in salad cream, respectively. Considering formula cost in a commercial production and the recommended daily intake (RDI) of inulin in the finished product at end of shelf life (≥3 g/d), an addition of 5 % inulin for tuna in spring water and 7 % inulin for tuna in mayonnaise, tuna in thousand island and tuna in salad cream are recommended.

  12. Global pollution monitoring of polychlorinated dibenzo-p-dioxins (PCDDs), furans (PCDFs) and coplanar polychlorinated biphenyls (coplanar PCBs) using skipjack tuna as bioindicator

    Energy Technology Data Exchange (ETDEWEB)

    Ueno, D.; Watanabe, M.; Subraminian, A.N.; Tanabe, S. [Ehime Univ. (Japan); Tanaka, H. [National Research Inst. of Fisheries and Environment of Inland Sea (Japan); Fillmann, G. [Fundacao Univ. Federal do Rio Grande (Brazil); Lam, P.K.S.; Zheng, G.J. [City Univ. of Hong Kong (Hong Kong); Muchtar, M.; Razak, H. [Indonesian Inst. of Sciences (Indonesia); Prudente, M. [De La Salle Univ. (Philippines); Chung, K. [Sungkyunkwan Univ. (Korea)

    2004-09-15

    Worldwide contamination by dioxins and related compounds, such as polychlorinated dibenzop- dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs) and coplanar polychlorinated biphenyls (coplanar PCBs) representing persistent organic pollutants (POPs) have been of great concern due to their persistency in the environment, highly bioaccumulative nature and adverse effects on wildlife and humans. Several studies on air samples and marine organisms from open seas suggested a long range transport of these compounds through atomosphere. Although several investigators have monitored dioxins pollution in localized areas, information on the global distribution of dioxins which can explain their atomospheric transport, behavior and fate are still limited. Skipjack tuna is primarily distributed from offshore waters to open seas in tropical and temperate regions almost all over the world such as the Pacific, Atlantic and Indian Oceans6. This species is an important commercial fish and its ecology and biology has been well studied. Moreover, suitability of skipjack tuna for global monitoring of organic pollutants (DDTs, HCHs PBDEs, organotins, etc.) has been established in our previous report, indicating that migration pattern, growth stage and sex of these animals have no or little effect on the variations of POPs residue levels in their bodies. Hence this species reflected POPs pollution levels in seawater when and where they were collected, caused by the rapid equilibrium partitioning between seawater and body lipid. These facts made skipjack tuna a suitable bioindicator for monitoring the contamination status of dioxins and related compounds. The objectives of this study are to elucidate the global distribution of dioxins (PCDD/Fs and coplanar PCBs) in offshore waters and open seas, and to understand the transport and behaviour of these chemicals using skipjack tuna as bioindicator.

  13. Temperature sensitivity of cardiac function in pelagic fishes with different vertical mobilities: yellowfin tuna (Thunnus albacares), bigeye tuna (Thunnus obesus), mahimahi (Coryphaena hippurus), and swordfish (Xiphias gladius).

    Science.gov (United States)

    Galli, Gina L J; Shiels, Holly A; Brill, Richard W

    2009-01-01

    We measured the temperature sensitivity, adrenergic sensitivity, and dependence on sarcoplasmic reticulum (SR) Ca(2+) of ventricular muscle from pelagic fishes with different vertical mobility patterns: bigeye tuna (Thunnus obesus), yellowfin tuna (Thunnus albacares), and mahimahi (Coryphaena hippurus) and a single specimen from swordfish (Xiphias gladius). Ventricular muscle from the bigeye tuna and mahimahi exhibited a biphasic response to an acute decrease in temperature (from 26 degrees to 7 degrees C); twitch force and kinetic parameters initially increased and then declined. The magnitude of this response was larger in the bigeye tuna than in the mahimahi. Under steady state conditions at 26 degrees C, inhibition of SR Ca(2+) release and reuptake with ryanodine and thapsigargin decreased twitch force and kinetic parameters, respectively, in the bigeye tuna only. However, the initial inotropy associated with decreasing temperature was abolished by SR inhibition in both the bigeye tuna and the mahimahi. Application of adrenaline completely reversed the effects of ryanodine and thapsigargin, but this effect was diminished at cold temperatures. In the yellowfin tuna, temperature and SR inhibition had minor effects on twitch force and kinetics, while adrenaline significantly increased these parameters. Limited data suggest that swordfish ventricular muscle responds to acute temperature reduction, SR inhibition, and adrenergic stimulation in a manner similar to that of bigeye tuna ventricular muscle. In aggregate, our results show that the temperature sensitivity, SR dependence, and adrenergic sensitivity of pelagic fish hearts are species specific and that these differences reflect species-specific vertical mobility patterns.

  14. STRUKTUR UKURAN, HUBUNGAN PANJANG-BOBOT DAN FAKTOR KONDISI IKAN TUNA DI PERAIRAN PRIGI, JAWA TIMUR

    Directory of Open Access Journals (Sweden)

    Erfind Nurdin

    2016-03-01

    Full Text Available Penelitian tentang struktur ukuran dan faktor kondisi ikan tuna yang tertangkap di perairan sekitar rumpon di Selatan Prigi, Jawa Timur dilakukan pada bulan Juli 2010, Desember 2010 dan Januari 2011. Sampel ikan diperoleh di PPN Prigi, diidentifikasi menurut jenis dan diukur panjang cagak serta ditimbang bobotnya.  Tujuan penelitian ini adalah untuk mengetahui pola pertumbuhan dan faktor kondisi ikan tuna yang tertangkap di sekitar rumpon.  Hasil penelitian menunjukkan ikan cakalang (Katsuwonus pelamis yang diukur sebanyak 115 ekor dengan dominasi ukuran panjang berkisar antara 32–36 cmFL dan bobot antara 0,75–1,20 kg; tuna mata besar (Thunnus obesus sebanyak 114 ekor dengan dominasi panjang pada kisaran 40–44 cmFL dan bobot antara 0,75– 1,20 kg; dan tuna sirip kuning (Thunnus albacares 107 ekor dengan dominasi panjang berkisar antara 28–32 cmFL dengan bobot 0,30–0,75 kg. Hubungan panjang bobot ikan cakalang mengikuti persamaan W= 0,055FL2,733, tuna mata besar W= 0,014FL3,096 dan tuna sirip kuning W= 0,0006FL3,960.   Faktor kondisi (K ikan cakalang adalah 2, tuna mata besar 2,1 dan tuna sirip kuning 2,0.   Study on size structure and condition factor of tuna caught around FADs in the south of Prigi, East Java was conducted in July 2010, December 2010 and January 2011.  The objectives of this study are to investigate that the size distribution, L-W relationship and condition factor of dominant fish caught around of FADs.  The result showed that the size distribution of skipjack tuna dominated in range of  32–36 cmFL and 0.75–1.20 kg (body weight, bigeye tuna range of 40–44 cmFL and 0.75– 1.20 kg (body weight, yellowfin tuna range of 28–32 cmFL and 0.30–0.75 kg (body weight.  Length weight relationship of skipjack tuna can described as W= 0.055FL2.733, bigeye tuna W= 0.014FL3.096 and yellowfin W= 0.0006FL3.960.  The value of condition factor was 2.0 for skipjack tuna, mean while for bigeye tuna was 2.1 and for

  15. Contribution of cephalopod prey to the diet of large pelagic fish predators in the central North Atlantic Ocean

    Science.gov (United States)

    Logan, John M.; Toppin, Rebecca; Smith, Sean; Galuardi, Benjamin; Porter, Julie; Lutcavage, Molly

    2013-10-01

    Trophic studies documenting the importance of cephalopod prey for large pelagic fish predators have been performed recently for open ocean ecosystems in the Pacific and Indian oceans, but similar data for the central North Atlantic Ocean have been lacking. A series of longline sampling cruises targeting large pelagic fish species was undertaken in the central North Atlantic Ocean in 2001-2002, and stomach samples were analyzed from a variety of tuna, shark, and billfish species to help fill this data gap. Stomach samples were collected from nine species (n=170 non-empty stomachs), with the majority of stomachs from Atlantic swordfish (Xiphias gladius; n=69), yellowfin tuna (Thunnus albacares; n=31), and albacore tuna (Thunnus alalunga; n=28). Ommastrephid squids were the most ubiquitous prey group across predator species and sampling years. Secondary cephalopod prey included octopods, histioteuthids, and architeuthids. Mesopelagic fishes and Sargassum-associated fishes were also identified as important prey. Diet composition varied spatially and prey size increased with predator size for swordfish and yellowfin tuna. Our results support findings in other ocean basins that demonstrate the importance of squid to large pelagic fishes and highlight the need for more research on their ecological and biophysical dynamics.

  16. STATUS PEMANFAATAN DAN PENGELOLAAN SUMBERDAYA IKAN TUNA NERITIK DI SAMUDERA HINDIA WPP 572 DAN 573

    Directory of Open Access Journals (Sweden)

    Agustinus Anung Widodo

    2014-05-01

    Full Text Available Dalam rangka mendeskripsikan status pemanfaatan dan pengelolaan sumberdaya tuna neritik di perairan Samudera Hindia (WPP 572 dan 573 telah dilakukan analisis terhadap informasi tentang jenis dan produksi tuna neritik yang disajikan dalam Statistik Perikanan Tangkap di Laut Menurut WPP tahun 2005-2012 (DJPT, 2013 serta data hasil penelitian berbasis di PPS Cilacap dan PPN Sibolga tahun 2011. Rekomendasi ‘working party’ tentang tuna neritik dari IOTC dikaji sebagai langkah pengelolaan perikanan tuna neritik di Indonesia. Hasil analisis dan kajian menunjukkan bahwa sumberdaya ikan tuna neritik yang tertangkap nelayan Indonesia di perairan WPP 572 dan 573 meliputi tongkol lisong (Auxis rochei, tongkol krai (Auxis thazard, tongkol komo atau kawakawa (Euthynnus affinis dan tongkol abu-abu (Thunnus tonggol. Tuna neritik tertangkap sebagai by-product dari pukat cincin, jaring insang hanyut, pancing tonda, pancing ulur dan bagan. Tahun 2011 produksi neritik tuna di Samudera Hindia khususnya WPP 572 dan 573 mencapai 121.818 ton atau 29,4% dari total produksi tuna neritik nasional. Tuna neritik jenis tongkol lisong dan krai yang tertangkap jaring insang hanyut yang berbasis di Cilacap > 70% merupakan ikan yang telah dewasa. Adapun tongkol komo yang tertangkap pukat cincin yang berbasis di Sibolga sekitar 55,5% merupakan ikan dewasa. Belum ada langkah-langkah pengelolaan secara spesifik terhadap sumberdaya tuna neritik di Indonesia. Merujuk hasil Working Party on Neritic Tuna pertama dan kedua tahun 2011 dan 2012, Indian Ocean Tuna Commission (IOTC merekomendasikan adanya kerjasama antar negara anggota IOTC yang saling berdekatan didalam melakukan pengelolaan sumberdaya neritik tuna. Langkah pertama adalah dilakukan perelitian mengenai populasi melalui studi mtDNA untuk memastikan status stok dan populasinya.   The species of neritic tuna caught by fishers in the Indian Ocean particularly FMAs 572 and 573 consisted of frigate tuna (Auxis thazard

  17. The effects of water depth and light on oviposition and egg cannibalism in the bluefin killifish Lucania goodei.

    Science.gov (United States)

    Sandkam, B A; Fuller, R C

    2011-03-01

    This study showed that sex and depth had strong effects on egg cannibalism, whereas water clarity (clear v. tea-stained) had no effect on cannibalism or oviposition in the bluefin killifish Lucania goodei. These results are consistent with the extreme levels of iteroparity in L. goodei where females appear to spread their eggs across multiple locations and depths presumably to avoid egg predation. © 2011 The Authors. Journal of Fish Biology © 2011 The Fisheries Society of the British Isles.

  18. Hubungan Antara Body Image Dan Self-esteem Pada Dewasa Awal Tuna Daksa

    OpenAIRE

    Sari, Dahlia Nur Permata

    2012-01-01

    Penelitian ini meneliti mengenai pengaruh body image terhadap selfesteem pada dewasa awal tuna daksa. Hipotesis pada penelitian ini adalah adanya hubungan positif antara body image dan self-esteem pada dewasa awal tuna daksa. Semakin positif body image maka semakin tinggi self-esteem yang dimiliki, begitu juga sebaliknya, semakin negatif body image maka semakin rendah self-esteem yang dimiliki. Sampel penelitian sebanyak 30 dewasa awal tuna daksa yang memiliki cacat tubuh seteleh kelahiran. D...

  19. Storage Time and Temperature Effects on Histamine Production in Tuna Salad Preparations.

    Science.gov (United States)

    McCarthy, Susan; Bjornsdottir-Butler, Kristin; Benner, Ronald

    2015-07-01

    Scombrotoxin fish poisoning (SFP), also known as histamine (Hst) poisoning, has been associated with consumption of scombroid-type fish, including tuna and tuna fish products. Preparation of commercial tuna salad contaminated with Hstproducing bacteria (HPB), combined with time-temperature abuse, can present a food safety hazard. A potential source of HPB is raw ingredients, such as celery and onions. The objectives of this study were to determine whether raw ingredients can be a source of HPB and to ascertain the effects of storage time (up to 4 days or 4 weeks) and temperature (4, 10, 18, 25, 30°C) on growth and Hst production by high-HPB (>1,000 ppm of Hst) in tuna salad preparations. Pantoea-Erwinia, Erwinia persicinus, Erwinia spp., and Enterobacter pyrinus isolated from celery in this study were used to inoculate tuna salad and tuna salad with celery or onion. HPB numbers were 0.7 to 4.3 log most probable number per g higher in the presence of celery or onion versus plain tuna salad (3:1 tuna:mayonnaise). E. pyrinus-inoculated plain tuna salad and tuna salad with celery and onion had >500 ppm of Hst after 2 days at 30°C and 4 days at 25°C. E. pyrinus-inoculated salad with celery and onion had >500 ppm of Hst after 4 days at 18°C and 2 weeks at 10°C. Raw celery can introduce HPB into tuna salad, which can cause SFP if the product is time-temperature abused. Tuna salad products must be refrigerated at ≤4°C to prevent growth and Hst production by the HPB used in this study, to protect consumers from potential SFP.

  20. Visualizing the Food-Web Effects of Fishing for Tunas in the Pacific Ocean

    OpenAIRE

    Hinke, Jefferson T.; Kaplan, Isaac C.; Kerim Aydin; Watters, George M.; Olson, Robert J.; James F. K. Kitchell

    2004-01-01

    We use food-web models to develop visualizations to compare and evaluate the interactions of tuna fisheries with their supporting food webs in the eastern tropical Pacific (ETP) and the central north Pacific (CNP) Oceans. In the ETP and CNP models, individual fisheries use slightly different food webs that are defined by the assemblage of targeted tuna species. Distinct energy pathways are required to support different tuna species and, consequently, the specific fisheries that target differe...

  1. Production of aspartic peptidases by Aspergillus spp. using tuna ...

    African Journals Online (AJOL)

    A Kp of 4.5 for ATPS PEG 1450-Pi; in ATPS PEG 8000-Pi, Kp value of the range of 2 to 2.5 was obtained. A purification factor 2 was obtained. The method appears to be suitable as a first step for the purification of these proteins from these complex medium. Key words: Tuna cooked wastewater, aspartic peptidases, aqueous ...

  2. Convergent evolution in mechanical design of lamnid sharks and tunas.

    Science.gov (United States)

    Donley, Jeanine M; Sepulveda, Chugey A; Konstantinidis, Peter; Gemballa, Sven; Shadwick, Robert E

    2004-05-06

    The evolution of 'thunniform' body shapes in several different groups of vertebrates, including whales, ichthyosaurs and several species of large pelagic fishes supports the view that physical and hydromechanical demands provided important selection pressures to optimize body design for locomotion during vertebrate evolution. Recognition of morphological similarities between lamnid sharks (the most well known being the great white and the mako) and tunas has led to a general expectation that they also have converged in their functional design; however, no quantitative data exist on the mechanical performance of the locomotor system in lamnid sharks. Here we examine the swimming kinematics, in vivo muscle dynamics and functional morphology of the force-transmission system in a lamnid shark, and show that the evolutionary convergence in body shape and mechanical design between the distantly related lamnids and tunas is much more than skin deep; it extends to the depths of the myotendinous architecture and the mechanical basis for propulsive movements. We demonstrate that not only have lamnids and tunas converged to a much greater extent than previously known, but they have also developed morphological and functional adaptations in their locomotor systems that are unlike virtually all other fishes.

  3. PERBAIKAN KINERJA PENANGANAN KARGO IKAN TUNA; Di TERMINAL KARGO BANDAR UDARA INTERNASIONAL SOEKARNO HATTA

    Directory of Open Access Journals (Sweden)

    Dony Rahmad Pranoto

    2016-03-01

    Full Text Available The objectives of this study were 1 to identify the tuna cargo handling conducted in the export warehouse of PT. XYZ, 2 to determine the main variables that affect the performance of tuna cargo handling in the export warehouse of PT. XYZ, and 3 to determine what policies can be used to improve the performance of tuna cargo handling in the export warehouse of PT. XYZ. This research was conducted by using the descriptive methodology i.e. a discrete simulation model of the process of tuna cargo handling in the export warehouse of PT. XYZ by utilizing ARENA software. In the policy making of tuna cargo handling improvements, the Analytical Network Process, Benefit, Opportunity, Cost, and Risk (ANP BOCR were also used. The simulation results point out that the existing conditions contribute to the delay level of tuna cargo delivery by 12% with the quality level of 22,934%. Delays in tuna cargo delivery have led to an increase in operational costs by 1,5%. ANP BOCR results highlight that opening a special lane for perishable cargo handling will improve the performance of tuna cargo handling in the export warehouse of PT. XYZ. Furthermore, the results of discrete model simulations on the improvement scenario of tuna cargo handling performance show that by opening a special lane for perishable cargo handling, it can ensure delivery schedule to be accurate indicated by the level of on time delivery reaching up to 100%, with an average quality rate of 86.013%. By speeding up the processing period (with an average of 81.519 minutes, the delay of cargo delivery up to 100% will be reduced; therefore, the quality of tuna is maintained in a good condition with the histamine level of 6,7 ppm.Keywords: ANP BOCR, tuna, ARENA simulation system model, air cargo performance, perishable cargo

  4. Changesin Myoglobin of Big Eye Tuna During Chilling Storage

    Directory of Open Access Journals (Sweden)

    Stevi Imelda Murniati Wodi

    2015-01-01

    Full Text Available Big eye tuna (Thunnus obesus is one of the species of tuna which is have some value added such as have potential to improve animal protein sources, have high economic values as well as an export commodity.Mishandling and misapplication of high temparatures on the tuna handling at the tropics and sub tropics climate was significantly decreasing the value of myoglobin and affecting the solubility of protein. Myoglobin is a globular protein that have small molecular weight size and it was an important factor for determining the quality of meat and influencing factors of purchasing power by the consumer. The purpose of this experiments is to determining the changes of myoglobin content and the water soluble proteins content at some parts of big eye tuna in 9 days chilling temperatures. The portion which is analized was the ventral area, dorsal area and tail area. Myoglobin content in all portion above, both light and dark meat was analized. The results shows the decreased value of myoglobin content from first handling (day zero until day ninth (days 9th experiment. Each myoglobin contentfrom white meat at at ventral, dorsal and tail meat was decreased from 121.68 mg/100 into 41.35 mg/100, 148.2 mg/100g into 52.01 mg/100g, 105.16 mg/100g into 31.34 gr/100gram, after day ninth. The myoglobin content from dark meat at ventral, dorsal and tail meat, was decreased, too ; from 418.64 mg/100 gr into 121.01 mg/100 g, 446.21 mg/100 g into 58.34 mg/100 r and 145.65 mg/100 gr into 87.98 mg/100g after day ninth.Water soluble protein was derived into protein bands with molecular weight 15,4 kDa and 14 kDa. Its suspected as the myoglobin protein. The molecular weight difference was caused from degradation of protein during the storage.Keywords: Big eye tuna, meat, storage, myoglobin

  5. 50 CFR 216.92 - Dolphin-safe requirements for tuna harvested in the ETP by large purse seine vessels.

    Science.gov (United States)

    2010-10-01

    ... 50 Wildlife and Fisheries 7 2010-10-01 2010-10-01 false Dolphin-safe requirements for tuna... MAMMALS REGULATIONS GOVERNING THE TAKING AND IMPORTING OF MARINE MAMMALS Dolphin Safe Tuna Labeling § 216.92 Dolphin-safe requirements for tuna harvested in the ETP by large purse seine vessels. (a) U.S...

  6. Low-temperature transitions in cod and tuna determined by differential scanning calorimetry

    DEFF Research Database (Denmark)

    Jensen, Kristina Nedenskov; Jørgensen, Bo; Nielsen, Jette

    2003-01-01

    Differential scanning calorimetry measurements have revealed different thermal transitions in cod and tuna samples. Transition temperatures detected Lit -11degreesC, -15degreesC and -21degreesC were highly dependent on the annealing temperature. In tuna muscle an additional transition was observed...

  7. Implications of new economic policy instruments for tuna management in the Western and Central Pacific

    NARCIS (Netherlands)

    Yeeting, A.D.; Bush, S.R.; Ram-Bidesi, V.; Bailey, M.L.

    2016-01-01

    Tuna management in the Western and Central Pacific is complicated by the conflicting interests of countries and agents exploiting tuna resources in the region. Historically, regulatory attempts by Pacific Island Countries to control fishing effort within their Exclusive Economic Zones (EEZs) have

  8. Can Cooperative Management of Tuna Fisheries in the Western Pacific Solve the Growth Overfishing Problem?

    NARCIS (Netherlands)

    Bailey, M.L.; Rashid Sumaila, U.; Martell, S.J.D.

    2013-01-01

    Tuna fisheries in the western and central Pacific Ocean are important globally for both food and economic security. Yellowfin and bigeye tuna stocks in this region are declining, in part due to the juvenile bycatch of these species by the purse seine fishery using floating objects and fish

  9. Cultivo integral de dos especies de escómbridos : Atún rojo del Atlántico (Thunnus thynnus, L. 1758) y Bonito Atlántico (Sarda sarda, Bloch 1793)

    OpenAIRE

    Ortega García, Aurelio

    2015-01-01

    Scombridae comprise a family of pelagic fish species with a great potential for aquaculture due to fast growth rates and high commercial values. In the last years, it has been complete the life cycle in captivity of Pacific bluefin tuna (Thunnus orientalis), but with this exception, integral Aquaculture of species belonging to Scombriae does not exist or is capture-based. This thesis pretends to determine the basis for reproduction and larval rearing of two species of scombrids: Atlantic b...

  10. Développement d'un indice d'abondance robuste pour le thon rouge (Thunnus thynnus) en Méditerranée Nord-Occidentale obtenu par suivi aérien

    OpenAIRE

    Robert Klaus, Bauer

    2015-01-01

    Declines in Atlantic bluefin tuna stocks (ABFT, Thunnus thynnus), due to extensive over-fishing, have been widely publicized in recent decades. To counteract this trend, regulatory measures have been introduced by the fisheries managers, aiming at the rebuilding of ABFT stocks. However, apart from difficulties in controlling the implementation of these measures, fisheries management is limited in its capabilities to track their efficiency due to major uncertainties in the stock assessment. In...

  11. Determination of Mercury in Fish (Otollithes ruber and Canned Tuna Fish Marketed in Khuzestan and Shiraz,

    Directory of Open Access Journals (Sweden)

    A. Behzadnia

    2012-03-01

    Full Text Available In this study mercury was determined in canned tuna fish produced and distributed in Iran after digestion by the standard methods of AOAC. Mercury contents in fish and canned tuna fish were determined by cold vapor atomic absorption spectrophotometry. The metal contents expressed in mg/kg wet weight for mercury varied from 0.017 to 0.394 (average of 0. 089 and 0.023 to 0.529 (average of 0.146 in fish and canned tuna fish, respectively. The values were comparable and in the range of with the literature valves. The results of this study indicate that fish and tuna fish of produced and marketed in Iran have concentrations well below the standards FAO/WHO levels of these toxic metals and only one tuna samples exceeded the European dietary limit of 0.5 mg Hg/kg.

  12. Perilaku Tuna Fungsi Auditor: Pengujian atas Karakteristik Personal dan Penilai Kinerja Auditor

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    Aprina Nugrahesthy Sulistya Hapsari

    2016-12-01

      Fenomena perilaku tuna fungsi yang dilakukan oleh auditor makin dianggap lazim di lingkup audit. Hubungan antara karakteristik personal, karakteristik non personal dan perilaku tuna fungsi menjadi sesuatu hal yang menarik untuk diteliti. Penelitian ini menguji hubungan antara karakteristik personal berupa locus of control, tingkat kinerja pribadi karyawan, komitmen organisasi dan turnover intention dan penilai kinerja auditor sebagai faktor diluar karakteristik personal terhadap penerimaan perilaku tuna fungsi dalam lingkup audit. Pengumpulan data dilakukan melalui kuisioner dari responden yaitu auditor di KAP Kota Semarang dan Surakarta dengan metode convenience sampling karena populasi auditor yang bekerja tidak diketahui dengan pasti. Analisis data dengan menggunakan Model Persamaan Struktural. Hasil dari pengujian hipotesis mengindikasikan bahwa tidak ada hubungan antara karakteristik personal dengan penerimaan perilaku tuna fungsi dalam ruang lingkup audit. Sementara itu di lain sisi terdapat hubungan antara penilai kinerja auditor dengan penerimaan perilaku tuna fungsi dalam ruang lingkup audit.

  13. Biological properties of angiotensin-converting enzyme inhibitor derived from tuna muscle.

    Science.gov (United States)

    Kohama, Y; Oka, H; Matsumoto, S; Nakagawa, T; Miyamoto, T; Mimura, T; Nagase, Y; Satake, M; Takane, T; Fujita, T

    1989-09-01

    A novel inhibitor of angiotensin-converting enzyme (ACE) derived from tuna muscle, Pro-Thr-His-Ile-Lys-Trp-Gly-Asp (tuna AI), was chemically synthesized, and its biological properties were investigated. Synthetic tuna AI was found to be chemically and biologically indistinguishable from the native one. Tuna AI inhibited rabbit lung ACE non-competitively with Ki values of 1.7 and 5.7 microM with substrates, hippuryl-L-histidyl-L-leucine and angiotensin I, respectively. This peptide (5.3 microM) also doubled the effect of bradykinin in the contraction of isolated guinea pig ileum. The peptide did not show zinc chelating activity and carboxypeptidase A inhibitory activity. Thus, tuna AI was found to be a unique ACE inhibitory peptide with non-competitive manner, differing from many naturally occurring peptide ACE-inhibitors.

  14. Collapse and conservation of shark populations in the Northwest Atlantic.

    Science.gov (United States)

    Baum, Julia K; Myers, Ransom A; Kehler, Daniel G; Worm, Boris; Harley, Shelton J; Doherty, Penny A

    2003-01-17

    Overexploitation threatens the future of many large vertebrates. In the ocean, tunas and sea turtles are current conservation concerns because of this intense pressure. The status of most shark species, in contrast, remains uncertain. Using the largest data set in the Northwest Atlantic, we show rapid large declines in large coastal and oceanic shark populations. Scalloped hammerhead, white, and thresher sharks are each estimated to have declined by over 75% in the past 15 years. Closed-area models highlight priority areas for shark conservation, and the need to consider effort reallocation and site selection if marine reserves are to benefit multiple threatened species.

  15. Studi Laju Umpan pada Proses Biokonversi Limbah Pengolahan Tuna menggunakan Larva Hermetia illucens

    Directory of Open Access Journals (Sweden)

    Arif Rahman Hakim

    2017-12-01

    Full Text Available Seiring dengan berkembangnya industri tuna, limbah pengolahan yang dihasilkan semakin meningkat. Namun demikian pemanfaatan limbah tersebut belum optimal. Biokonversi bahan organik limbah tuna menjadi biomassa larva sebagai bahan pakan diharapkan mampu mengatasi permasalahan tersebut. Biokonversi menggunakan larva Hermetia illucens atau Black Soldier Fly (BSF memiliki keunggulan dibandingkan proses konversi lain; di antaranya larva BSF mampu mengkonversi berbagai macam bahan organik, memiliki kandungan nutrisi tinggi serta bukan vektor penyakit. Tujuan penelitian ini ialah mempelajari laju umpan larva BSF dalam mengkonversi limbah tuna menjadi biomassa larva. Limbah tuna yang digunakan sebagai umpan larva BSF adalah kepala dan jeroan. Larva dipelihara selama 19 hari dengan pemberian umpan bervariasi (60, 80, 100 mg/larva/hari. Analisa dilakukan terhadap konsumsi umpan, indeks pengurangan limbah (waste reduction index/WRI, efisiensi konversi umpan tercerna (efficiency of conversion of digested-feed/ECD, tingkat kelulusan hidup (survival rates /SR, bobot larva, kandungan protein dan lemak larva. Hasil penelitian menunjukkan kepala dan jeroan tuna dapat digunakan sebagai pakan BSF, dengan nilai SR 41,33 – 98,33%. Laju umpan yang menghasilkan proses biokonversi paling optimum adalah umpan berupa kepala tuna sebesar 60 mg/larva/hari (K60. Nilai parameter pada perlakuan K60 adalah konsumsi umpan 77,09 %, WRI 4,06 % per hari, ECD 8,32 %, bobot larva 72,59 mg dan SR 98,33 %. Limbah berupa kepala tuna menghasilkan konsumsi umpan, WRI, ECD, bobot larva dan SR yang lebih tinggi dibandingkan limbah jeroan tuna. Penggunaan limbah kepala tuna dapat dimanfaatkan untuk mereduksi limbah sekaligus menghasilkan bahan pakan yang potensial. Kandungan larva BSF dengan umpan kepala tuna 60 mg/larva/hari meliputi protein 25,38 %, lemak 6,85 % dan air 62,81 %.

  16. Patterns of variations in large pelagic fish: A comparative approach between the Indian and the Atlantic Oceans

    Science.gov (United States)

    Corbineau, A.; Rouyer, T.; Fromentin, J.-M.; Cazelles, B.; Fonteneau, A.; Ménard, F.

    2010-07-01

    Catch data of large pelagic fish such as tuna, swordfish and billfish are highly variable ranging from short to long term. Based on fisheries data, these time series are noisy and reflect mixed information on exploitation (targeting, strategy, fishing power), population dynamics (recruitment, growth, mortality, migration, etc.), and environmental forcing (local conditions or dominant climate patterns). In this work, we investigated patterns of variation of large pelagic fish (i.e. yellowfin tuna, bigeye tuna, swordfish and blue marlin) in Japanese longliners catch data from 1960 to 2004. We performed wavelet analyses on the yearly time series of each fish species in each biogeographic province of the tropical Indian and Atlantic Oceans. In addition, we carried out cross-wavelet analyses between these biological time series and a large-scale climatic index, i.e. the Southern Oscillation Index (SOI). Results showed that the biogeographic province was the most important factor structuring the patterns of variability of Japanese catch time series. Relationships between the SOI and the fish catches in the Indian and Atlantic Oceans also pointed out the role of climatic variability for structuring patterns of variation of catch time series. This work finally confirmed that Japanese longline CPUE data poorly reflect the underlying population dynamics of tunas.

  17. Behavior of Salmonella and Listeria monocytogenes in Raw Yellowfin Tuna during Cold Storage

    Directory of Open Access Journals (Sweden)

    Chengchu Liu

    2016-03-01

    Full Text Available Behavior of Salmonella and Listeria monocytogenes in raw yellowfin tuna during refrigeration and frozen storage were studied. Growth of Salmonella was inhibited in tuna during refrigerated storage, while L. monocytogenes was able to multiply significantly during refrigerated storage. Populations of Salmonella in tuna were reduced by 1 to 2 log after 12 days of storage at 5–7 °C, regardless levels of contamination. However, populations of L. monocytogenes Scott A, M0507, and SFL0404 in inoculated tuna (104–105 CFU/g increased by 3.31, 3.56, and 3.98 log CFU/g, respectively, after 12 days of storage at 5–7 °C. Similar increases of L. monocytogenes cells were observed in tuna meat with a lower inoculation level (102–103 CFU/g. Populations of Salmonella and L. monocytogenes declined gradually in tuna samples over 84 days (12 weeks of frozen storage at −18 °C with Salmonella Newport 6962 being decreased to undetectable level (<10 CFU/g from an initial level of 103 log CFU/g after 42 days of frozen storage. These results demonstrate that tuna meat intended for raw consumption must be handled properly from farm to table to reduce the risks of foodborne illness caused by Salmonella and L. monocytogenes.

  18. Global pollution monitoring of butyltin compounds using skipjack tuna as a bioindicator

    Energy Technology Data Exchange (ETDEWEB)

    Ueno, D.; Inoue, S.; Takahashi, S.; Ikeda, K.; Tanaka, H.; Subramanian, A.N.; Fillmann, G.; Lam, P.K.S.; Zheng, J.; Muchtar, M.; Prudente, M.; Chung, K.; Tanabe, S

    2004-01-01

    Global pollution monitoring of butyltin in offshore water and open sea were conducted using skipjack tuna as a bioindicator. - Butyltin compounds (BTs) including mono- (MBT), di- (DBT), tri-butyltin (TBT) and total tin ({sigma}Sn), were determined in the liver of skipjack tuna (Katsuwonus pelamis) collected from Asian offshore waters (off-Japan, the Japan Sea, off-Taiwan, the East China Sea, the South China Sea, off-Philippines, off-Indonesia, the Bay of Bengal), off-Seychelles, off-Brazil and open seas (the North Pacific). BTs were detected in all the skipjack tuna collected, suggesting widespread contamination of BTs even in offshore waters and open seas on a global scale. Considering specific accumulation, Sex-, body length- differences and migration of skipjack tuna did not seem to affect BT concentrations, indicating rapid reflection of the pollution levels in seawater where and when they were collected. Skipjack tuna is a suitable bioindicator for monitoring the global distribution of BTs in offshore waters and open seas. High concentrations of BTs were observed in skipjack tuna from offshore waters around Japan, a highly developed and industrialized region (up to 400 ng/g wet weight). Moreover skipjack tuna collected from offshore waters around Asian developing countries also revealed the levels comparable to those in Japan (up to 270 ng/g wet weight) which may be due to the recent improvement in economic status in Asian developing countries. High percentages (almost 90%) of BTs in total tin ({sigma}Sn: sum of inorganic tin+organic tin) were found in the liver of skipjack tuna from offshore waters around Asian developing countries. This finding suggests that the anthropogenic BTs represent the major source of Sn accumulation in skipjack tuna from these regions.

  19. Skipjack tuna as a bioindicator of contamination by perfluorinated compounds in the oceans.

    Science.gov (United States)

    Hart, Kimberly; Kannan, Kurunthachalam; Tao, Lin; Takahashi, Shin; Tanabe, Shinsuke

    2008-09-15

    Perfluorinated chemicals (PFCs) have emerged as global environmental contaminants. Studies have reported the widespread occurrence of PFCs in biota from marine coastal waters and in remote polar regions. However, few studies have reported the distribution of PFCs in biota from offshore waters and open oceans. In this study, concentrations of nine PFCs were determined in the livers of 60 skipjack tuna (Katsuwonus pelamis) collected from offshore waters and the open ocean along the Pacific Rim, including the Sea of Japan, the East China Sea, the Indian Ocean, and the Western North Pacific Ocean, during 1997-1999. At least one of the nine PFCs was found in every tuna sample analyzed. Overall, perfluorooctanesulfonate (PFOS) and perfluoroundecanoic acid (PFUnDA) were the predominant compounds found in livers of tuna at concentrations of ocean locations, concentrations of PFUnDA were greater than the concentrations of PFOS. The profiles and concentrations of PFCs in tuna livers suggest that the sources in East Asia are dominated by long-chain perfluorocarboxylates, especially PFUnDA. High concentrations of PFUnDA in tuna may indicate a shift in sources of PFCs in East Asia. The spatial distribution of PFOS in skipjack tuna reflected the concentrations previously reported in seawater samples from the Pacific and Indian Oceans, suggesting that tuna are good bioindicators of pollution by PFOS. Despite its predominance in ocean waters, PFOA was rarely found in tuna livers, indicative of the low bioaccumulation potential of this compound. Our study establishes baseline concentrations of PFCs in skipjack tuna from the oceans of the Asia-Pacific region, enabling future temporal trend studies of PFCs in oceans.

  20. Maneuvering and stability performance of a robotic tuna.

    Science.gov (United States)

    Anderson, Jamie M; Chhabra, Narender K

    2002-02-01

    The Draper Laboratory Vorticity Control Unmanned Undersea Vehicle (VCUUV) is the first mission-scale, autonomous underwater vehicle that uses vorticity control propulsion and maneuvering. Built as a research platform with which to study the energetics and maneuvering performance of fish-swimming propulsion, the VCUUV is a self-contained free swimming research vehicle which follows the morphology and kinematics of a yellowfin tuna. The forward half of the vehicle is comprised of a rigid hull which houses batteries, electronics, ballast and hydraulic power unit. The aft section is a freely flooded articulated robot tail which is terminated with a lunate caudal fin. Utilizing experimentally optimized body and tail kinematics from the MIT RoboTuna, the VCUUV has demonstrated stable steady swimming speeds up to 1.2 m/sec and aggressive maneuvering trajectories with turning rates up to 75 degrees per second. This paper summarizes the vehicle maneuvering and stability performance observed in field trials and compares the results to predicted performance using theoretical and empirical techniques.

  1. KAPASITAS PENANGKAPAN PANCING ULUR TUNA DI KEPULAUAN BANDA NEIRA

    Directory of Open Access Journals (Sweden)

    Baihaqi Baihaqi

    2016-04-01

    Fishing capacity is an approach to fishery management relating to restrictions on fishing effort capacity. The effort capacity is determined by several variables such as vessel  and engine sizes, the size of the nets, and fishing tool technology. Study of fishing capacity based fisheries management is an alternative approach to control the input factors that are not efficiently used in fishing effort. Through the research capacity, it is expected to know the level of technical efficiency of fishing tuna fishing fleet in the Banda Sea. Fishing capacity was examined using analysis technique Data Envelopment Analysis (DEA using a linear programming. The results show that the tuna line fisheries in the Banda Neira with single output approach (catch weight, was generally at the level of efficiency that is far under from the optimal level with the current input has exceeded the optimal capacity. To achieve the production potential of the third fishing grounds, reductions of the capacity of 33%, 42% and 45% for Hatta Island, Manukang Island and Rhum Island, respectively should be done.

  2. Seasonal distributions and migrations of Northwest Atlantic swordfish: inferences from integration of pop-up satellite archival tagging studies.

    Directory of Open Access Journals (Sweden)

    John D Neilson

    Full Text Available Data sets from three laboratories conducting studies of movements and migrations of Atlantic swordfish (Xiphias gladius using pop-up satellite archival tags were pooled, and processed using a common methodology. From 78 available deployments, 38 were selected for detailed examination based on deployment duration. The points of deployment ranged from southern Newfoundland to the Straits of Florida. The aggregate data comprise the most comprehensive information describing migrations of swordfish in the Atlantic. Challenges in using data from different tag manufacturers are discussed. The relative utility of geolocations obtained with light is compared with results derived from temperature information for this deep-diving species. The results show that fish tagged off North America remain in the western Atlantic throughout their deployments. This is inconsistent with the model of stock structure used in assessments conducted by the International Commission for the Conservation of Atlantic Tunas, which assumes that fish mix freely throughout the North Atlantic.

  3. Seasonal distributions and migrations of Northwest Atlantic swordfish: inferences from integration of pop-up satellite archival tagging studies.

    Science.gov (United States)

    Neilson, John D; Loefer, Josh; Prince, Eric D; Royer, François; Calmettes, Beatriz; Gaspar, Philippe; Lopez, Rémy; Andrushchenko, Irene

    2014-01-01

    Data sets from three laboratories conducting studies of movements and migrations of Atlantic swordfish (Xiphias gladius) using pop-up satellite archival tags were pooled, and processed using a common methodology. From 78 available deployments, 38 were selected for detailed examination based on deployment duration. The points of deployment ranged from southern Newfoundland to the Straits of Florida. The aggregate data comprise the most comprehensive information describing migrations of swordfish in the Atlantic. Challenges in using data from different tag manufacturers are discussed. The relative utility of geolocations obtained with light is compared with results derived from temperature information for this deep-diving species. The results show that fish tagged off North America remain in the western Atlantic throughout their deployments. This is inconsistent with the model of stock structure used in assessments conducted by the International Commission for the Conservation of Atlantic Tunas, which assumes that fish mix freely throughout the North Atlantic.

  4. ESTABLISHMENT OF THE PENTECOSTALISM IN VICTORY OF LAS TUNAS CITY / ASENTAMIENTO DEL PENTECOSTALISMO EN VICTORIA DE LAS TUNAS

    Directory of Open Access Journals (Sweden)

    Enrique Antonio Lalana Torres

    2012-09-01

    Full Text Available The socioreligious studies are a topic that they have not been very managed at present. During the search of the information for this investigation, verified that in the word of investigations of the religious phenomenon that form the socio-religious specter in the country the approach to certain variants of the pentecostalism and its influence into the national cultural identity has been a topic not blown for the main investigating sociologists, ethnologists, and even the theologians have not blown the topic for considering it a little delicate. Therefore, in the environment of the religious investigations in our country, is the first time makes a study of this nature. In this work it makes, after a theoretical dissertation on the pentecostal movement, an approach to his settling in the territory of Las Tunas, by contributing a compendium of historiographical data that guarantees with an endorsement this prosecute developed in the decade of the 50´s of the XX century and the importance that has generated in the popular culture in the belonging territory to the then municipality of Victoria de Las Tunas.

  5. Discrimination of juvenile yellowfin (Thunnus albacares and bigeye (T. obesus Tunas using mitochondrial DNA control region and liver morphology.

    Directory of Open Access Journals (Sweden)

    Ivane R Pedrosa-Gerasmio

    Full Text Available Yellowfin tuna, Thunnus albacares (Bonnaterre, 1788 and bigeye tuna, Thunnus obesus (Lowe, 1839 are two of the most economically important tuna species in the world. However, identification of their juveniles, especially at sizes less than 40 cm, is very difficult, often leading to misidentification and miscalculation of their catch estimates. Here, we applied the mitochondrial DNA control region D-loop, a recently validated genetic marker used for identifying tuna species (Genus Thunnus, to discriminate juvenile tunas caught by purse seine and ringnet sets around fish aggregating devices (FADs off the Southern Iloilo Peninsula in Central Philippines. We checked individual identifications using the Neighbor-Joining Method and compared results with morphometric analyses and the liver phenotype. We tested 48 specimens ranging from 13 to 31 cm fork length. Morpho-meristic analyses suggested that 12 specimens (25% were bigeye tuna and 36 specimens (75% were yellowfin tuna. In contrast, the genetic and liver analyses both showed that 5 specimens (10% were bigeye tuna and 43 (90% yellowfin tuna. This suggests that misidentification can occur even with highly stringent morpho-meristic characters and that the mtDNA control region and liver phenotype are excellent markers to discriminate juveniles of yellowfin and bigeye tunas.

  6. Proportions of Atlantic sailfish (Istiophorus platypterus and spearfish (Tetrapturus pfluegeri caught in tuna longline fisheries

    Directory of Open Access Journals (Sweden)

    Renata Maria Medeiros-Silva

    2016-11-01

    Full Text Available Abstract The reliability of estimations of catches of pelagic longline fisheries is especially worrying in the case of non-target species such as the sailfish (Istiophorus platypterus and spearfish (Tetrapturus pfluegeri, because they are often recorded aggregated in onboard maps. For this reason, generalized linear models were used to identify a number of important explanatory variables and their effect on sailfish and spearfish proportions. The response variable (number of sailfish in the aggregate capture is assumed as binomial using the logit link function. The explanatory variables used were foram year, qrt (quarter, fleet, de (distance from equator and d (distance from areas above sea level. The selected models showed that the equatorial and coastal regions presented higher densities or catchabilities of sailfish when compared to spearfish, as in the case for fleets of China Taipei and the United States. The lowest mean proportion of sailfish [sailfish/(sailfish + spearfish] of the third quarter were driven mostly by the low estimations calculated for Japan and Brazil.

  7. Recruitment variability and environment: issues related to stock assessments of Atlantic tunas

    OpenAIRE

    Fromentin, Jean-Marc; Restrepo, Victor

    2001-01-01

    Las variaciones en el reclutamiento y la fuerza de la clase anual de las poblaciones de peces son características bien conocidas que pueden estar relacionadas con tres principales factores: 1) la actividad humana, principalmente la sobreexplotación del stock reproductor, y también la contaminación de las zonas de desove y cría; 2) los procesos biológicos, como la depredación, canibalismo y competencia, y 3) fenómenos del medio ambiente. Las características del ciclo vital de los túnidos at...

  8. SWFSC/MMTD/ETP: Dolphin-Tuna Tracking Studies (DTTS) 1992-1993

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This research was designed to better understand the nature of the dolphin-tuna bond in the eastern tropical Pacific Ocean. In this study, researchers attempted to...

  9. 76 FR 39808 - International Fisheries; Pacific Tuna Fisheries; Recommendations Adopted by the Inter-American...

    Science.gov (United States)

    2011-07-07

    ... and the 2010 stock assessments of bigeye and yellowfin tuna completed by IATTC staff. The differences... forecasting, tsunami warnings, search and rescue efforts, and research of the marine environment and that...

  10. STATUS STOK, EKSPLOITASI DAN OPSI PENGELOLAAN SUMBERDAYA IKAN TUNA DI LAUT BANDA

    Directory of Open Access Journals (Sweden)

    Agustinus Anung Widodo

    2015-05-01

    Full Text Available Laut Banda merupakan salah satu daerah penangkapan tuna yang potensial di Indonesia, Jenis alat tangkap yang digunakan terdiri dari pukat cincin, huhate, rawai tuna, pancing ulur dan pancing tonda. Hasil tangkapan tuna di Laut Banda meliputi cakalang, madidihang dan tuna mata besar. Sumberdaya tuna di Laut Banda diduga masih merupakan sub stok sumberdaya tuna di perairan Pasifik Tengah dan Barat. Hasil kajian stok tuna oleh Western and Central Pacific Fisheries Commission (WCPFC pada 2012 melaporkan bahwa stok cakalang dan madidihang tidak mengalami overfishing dan overfished, sedangkan tuna mata besar telah mengalami overfishing dan overfished. Hasil penelitian Pusat Penelitian Pengelolaan Perikanan dan Konservasi Sumber Daya Ikan (P4KSI pada 2012 menunjukkan madidihang dan tuna mata besar tertangkap pukat cincin, huhate serta kombinasi pancing ulur permukaan dan pancing tonda pada stadium yuwana, dengan indikasi nilai LcFmsy while YFT and SKJ are not in overfishing or overfished state. It was also reported by RCFMC that the size of catch of those species by various fishing gear indicating that value of Lctuna resource and market preference, so that to the best fishing practice for resource sustainability it is suggestted for tuna management in Banda sea should be not to develop and increase the effort for purse seine and may shift to pole line, hand line and/or troll line are still openated.

  11. JENIS, UKURAN DAN DAERAH PENANGKAPAN HIU THRESHER (FAMILI ALOPIIDAE) YANG TERTANGKAP RAWAI TUNA DI SAMUDERA HINDIA

    OpenAIRE

    Agustinus Anung Widodo; Ralph Thomas Mahulette

    2016-01-01

    Sebagai anggota Indian Ocean Tuna Commision (IOTC) Indonesia wajib mengadopsi isi Resolusi IOTC 10/12 yang mengatur pengelolaan sumberdaya ikan hiu thresher (famili Alopiidae). Secara spesifik Indonesia belum melaksanakan pengelolaan sumberdaya hiu thresher karena spesies tersebut belum mendapatkan perhatian serius. Tulisan ini bermaksud menyampaikan hasil penelitian tentang ikan hiu thresher (Famili Alopiidae) yang tertangkap rawai tuna di Samudera Hindia berbasis di Cilacap. Data diperoleh ...

  12. Quality Changes of Light Flesh Tuna at Water of Tomini Bay, Gorontalo Province

    Directory of Open Access Journals (Sweden)

    Wila Rumina Nento

    2015-01-01

    Full Text Available Tuna is one of the mainstay fisheries commodities that involve many of the ordinary fishermen. The handling usually still not follows the principles of good handling that causing the poor quality as the result.The aims of this research were to analyze and to determine the quality of tuna meat (the abdominal wall, dorsal fin, and caudal fin. Raw material yellowfin tuna meat prepared for the light, the meat section of the abdominal wall, dorsal fin, and caudal fin. The result of organoleptic analysis showed that the tuna meat was above the minimum value for the criteria of fresh fish. The result of TVB analysis showed that the meat on the caudal fin had the highest value and significantly different with the other, but still exist on the safe limits and on the fresh category. For the result of analysis in histamine, it shown that at the fourth hour the meat at the dorsal fin had the histamine content which were above the minimum that have been recommended. For the result of analysis in peroxide number, it shown that the tuna meat did not sustain the fat damage until the fourth hour after the catching process. And for the result of analysis in TPC, it showed that at the fourth hour the tuna meat on the pectoral fin had the highest number of total colony and significantly different with the other.Keywords: handling, histamine, light flesh, microbiology, yellowfin

  13. Cytochrome Oxidase I (COI) sequence conservation and variation patterns in the yellowfin and longtail tunas.

    Science.gov (United States)

    Kunal, Swaraj Priyaranjan; Kumar, Girish

    2013-01-01

    Tunas are commercially important fishery worldwide. There are at least 13 species of tuna belonging to three genera, out of which genus Thunnus has maximum eight species. On the basis of their availability, they can be characterised as oceanic such as Thunnus albacares (yellowfin tuna) or coastal such as Thunnus tonggol (longtail tuna). Although these two are different species, morphological differentiation can only be seen in mature individuals, hence misidentification may result in erroneous data set, which ultimately affect conservation strategies. The mitochondrial DNA cytochrome oxidase c subunit 1 (COI) gene is one of the most popular markers for population genetic and phylogeographic studies across the animal kingdom. The present study aims to study the sequence conservation and variation in mitochondrial Cytochrome Oxidase I (COI) between these two species of tuna. COI sequence analysis of yellowfin and longtail revealed the close relationship between them in Thunnus genera. The present study is the first direct comparison of mitochondrial COI sequences of these two tuna species.

  14. DAYA SAING EKSPOR TUNA KALENG INDONESIA DI UNI EROPA TAHUN 2003-2013

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    Umar Wahono

    2017-06-01

    Full Text Available Perbedaan tarif yang diberikan antara Indonesia yang lebih tinggi sebesar 20.5% dibandingkan dengan negara pesaing utamanya yang tergabung dalang Africa, Caribbean, Pasific (ACP Countries dengan pelayanan tarif impor hingga 0% ke pasar Uni Eropa (UE. Keadaan ini mampu menyebabkan menghilangnya distorsi perbedaan harga sesungguhnya yang seharusnya menjadi keuntungan lebih atas keunggulan komparatif yang dimiliki. Hal ini mampu melemahkan daya saing komoditi ekspor akibat dampak kenaikan harga terhadap tarif. Penelitian ini bertujuan untuk gambaran daya saing komoditas tuna kaleng Indonesia terhadap negara pesaingnya dipasar UE pada periode 2003-2013. Metode yang digunakan dalam penelitin ini adalah metode Revealed Comparative Advantage (RCA yang kemudian nilai RCA dikomparasikan tiap-tiap negara pengekspor utama tuna kaleng di pasar UE untuk melihat posisi daya saing relatifnya. Sedangkan untuk mendekomposisikan determinan pertumbuhan ekspor tuna kaleng Indonesia ke UE digunankan metode Constant Market Share (CMS. Hasil perhitungan nilai RCA tuna kaleng Indonesia periode 2003-2013 di pasar UE memiliki daya saing dengan rata-rata nilai RCA 4.27. Namun masih dibawah rata-rata nilai RCA negara ACP Countries. Perbedaan pelayanan tarif impor oleh UE untuk komoditas tuna kaleng Indonesia tidak berdampak terhadap penurunan daya saing. The difference between the rates given Indonesia which is higher by 20.5% compared to its main competitor countries that joined the mastermind Africa, Caribbean, Pacific (ACP Countries with service import tariffs to 0% to the European Union (EU. This situation is capable of causing the disappearance of the distortion of the true price difference should be more advantages over comparative advantage. It is capable of undermining the competitiveness of export commodities due to the impact of price increases on tariffs. This study aims to illustrate the competitiveness of commodities Indonesian canned tuna to the EU market of

  15. JENIS, UKURAN DAN DAERAH PENANGKAPAN HIU THRESHER (FAMILI ALOPIIDAE YANG TERTANGKAP RAWAI TUNA DI SAMUDERA HINDIA

    Directory of Open Access Journals (Sweden)

    Agustinus Anung Widodo

    2016-03-01

    Full Text Available Sebagai anggota Indian Ocean Tuna Commision (IOTC Indonesia wajib mengadopsi isi Resolusi IOTC 10/12 yang mengatur pengelolaan sumberdaya ikan hiu thresher (famili Alopiidae. Secara spesifik Indonesia belum melaksanakan pengelolaan sumberdaya hiu thresher karena spesies tersebut belum mendapatkan perhatian serius. Tulisan ini bermaksud menyampaikan hasil penelitian tentang ikan hiu thresher (Famili Alopiidae yang tertangkap rawai tuna di Samudera Hindia berbasis di Cilacap. Data diperoleh dari kegiatan pengambilan contoh di pelabuhan tahun 2010, kegiatan observasi di atas kapal rawai tuna bulan Januari 2010 dan laporan statistik PPS Cilacap tahun 2006-2010. Hasil kajian menunjukkan bahwa: (a di perairan Indonesia ada dua spesies dari tiga spesies hiu thresher yang ada di dunia, yaitu hiu monyet atau pelagic thresher (Alopias pelagicus Nakamura 1935 dan hiu paitan atau bigeye thresher (A. superciliosus Lowe 1840. Satu spesies lainnya yang belum pernah ditemukan adalah thinfin thresher (A.vulpinus Bonnaterre1788.  Dilihat dari teknologi rawai tuna yang digunakan, daerah sebaran hiu thresher sama dengan tuna di Samudera Hindia, sehingga sulit untuk menghindari tidak tertangkapnya hiu thresher oleh rawai tuna. Jumlah dari jenis hiu monyet yang tertangkap rawai tuna di Samudera Hindia berkisar 0,1-0,6 % dan hiu paitan berkisar 0,1-1,3 % dari total tangkapan. Ukuran hiu thresher yang tertangkap rawai tuna umumnya ikan yang telah dewasa (berkisar 54-74% dan diduga telah mengalami pemijahan. Hampir semua bagian hiu thresher dimanfaatkan sebagai bahan pangan dan farmasi. Selain dipasarkan di dalam negeri, ikan hiu thresher juga diekspor terutama siripnya ke manca negara dan terbanyak ke China.   As a member of IOTC, Indonesia is obliged to implement all IOTC’s resolutions including resolution 10/12 on the conservation of thresher sharks (Family Alopiidae caught in association with fisheries in the IOTC area of competence. Indonsia has not

  16. Genetic homogeneity in longtail tuna Thunnus tonggol (Bleeker, 1851) from the northwest coast of India inferred from direct sequencing analysis of the mitochondrial DNA D-loop region

    Digital Repository Service at National Institute of Oceanography (India)

    Kunal, S.P.; GirishKumar; Menezes, M.R.; Meena, R.M.

    Longtail tuna Thunnus tonggol is a neritic species of the family Scombridae, having a confined coastal distribution to tropical and temperate waters of the Indo-Pacific region In the present study, the population structure of longtail tuna...

  17. The effect of various level of skipjack tuna bone meal (Katsuwonus pelamis L.) in ration on broiler carcass tenderness and abdominal fat

    OpenAIRE

    Lengkey H.A.W.; Bagau B.; Adriani L.; Ludong M.

    2011-01-01

    Hundred day old chicks Arbor Acres CP-707 were used randomizedly in this experiment, to study the effects of various levels skipjack tuna bone meal in ration on broiler carcass tenderness and abdominal fat, and were studied for six weeks. Research using Completely Randomized Design (CRD). The dietary treatments are: R0 basal diet as control, R1 basal diet + 2% tuna bone meal, R2 basal diet + 4% tuna bone meal and R3 basal diet + 6% tuna bone meal, and each ...

  18. Effect of tuna skin gelatin-based coating enriched with seaweed extracts on the quality of tuna fillets during storage at 4 °C

    Directory of Open Access Journals (Sweden)

    Milene Vala

    2017-10-01

    Full Text Available Nowadays, consumers demand high quality food products with an extended shelf-life without chemical additives. Edible coatings (EC containing natural compounds are a promising preservation technology for raw seafood without compromising fresh-like appeal and nutritional content.The aim of this work was to evaluate the effect of Thunnus obesus skin gelatin-based EC containing Codium spp. or Fucus vesiculosus extracts on raw tuna preservation. Three gelatin-based EC (gelatin (5 % + glycerol (25 %; gelatin (5 % + Codium spp. (1 % + glycerol (25 %; gelatin (5 % + Fucus vesiculosus (1 % + glycerol (25 % were applied directly on the surface of tuna fillets. Functional properties of gelatin and gelatin-based EC containing seaweed extracts were also studied. The gelatin was extracted by an acid-swelling process in the presence/absence of pepsin, followed by subsequent heating/refrigeration, after a pre-treatment with NaOH. The type of acid, temperature and concentration of NaOH greatly influence the process yield. The higher extraction yield was achieved using acetic acid in the presence of pepsin by subsequent refrigeration, especially when skins were previously treated with NaOH (0.2 M. Tuna quality was assessed over 12 days of storage at 4 ± 1 °C in terms of chemical and microbial indices. Results showed that tuna skin gelatin-based EC avoids tuna deterioration. Microbial growth, assessed by total viable counts, and total volatile basic nitrogen were maintained below the maximum limits recommended, contrarily to the control. Additionally, the use of EC increased the stability of red colour during storage. 

  19. Identification on Histamine Content and Histamin-Forming Bacteria of Boiled Badeng Slender Tuna

    Directory of Open Access Journals (Sweden)

    Yuliana Syalviana Fatuni

    2014-11-01

    Full Text Available Pindang is a semi-dried product which relatively short lasting products. Due to the rapid formation of histamine and bacterial enzyme activities contained in the fish, it is necessary to study and identify the histamine levels either on fresh tuna or in its pindang. This study aims to analyze histamine and histamine-forming bacteria in processed pindang tuna (A. rochei. Fresh tuna (A. rochei was obtained from TPI Cisolok Palabuhanratu. The fish was processed according to pindang badeng method (20% salt added, boiled for 8 hours. The product then stored at room temperature and observed for 0,8,16,24 and 32 hours. Analysis were conducted through chemical (histamine and TVB and microbiological test (TPC, identification of bacteria, histamine levels in bacteria. The results showed that the stored pindang for 32 hours can reactivate the production of histamine and increase their levels significantly. This is consistent with the increase on the value of TVB and TPC in pindang products. Six types of histamine-forming bacteria found on pindang tuna that are P. vulgaris, H. alvei, M. Morganii, E. aerogenes, K. oxytoca, K. pneumoniae. Activity test results showed that K. pneumoniae and H. alvei form the highest and the lowest levels of histamine formation respectively.Keywords: Histamine, bacterial, boiled tuna (Auxis rochei

  20. Mercury in canned tuna marketed in Cartagena, Colombia, and estimation of human exposure.

    Science.gov (United States)

    Alcala-Orozco, Maria; Morillo-Garcia, Yenifer; Caballero-Gallardo, Karina; Olivero-Verbel, Jesus

    2017-12-01

    The presence of mercury in tuna is ubiquitous, so national authorities should guarantee food safety of canned tuna available on the market, according to legal regulations. The objective of this survey was to assess total mercury (T-Hg) levels in brands of canned tuna marketed in Cartagena, Colombia, and determine fish consumption-based risks after ingestion. For that purpose, 252 cans of tuna were collected, representing 6 brands (A-F), in 2 mediums (water and oil). Mean T-Hg levels were 0.66 ± 0.05 and 0.61 ± 0.05 µg g(-1) wet weight, for water and oil, respectively. High T-Hg concentrations were measured in brands B and D. Only brands E and F guaranteed low risk for Hg-related health problems. According to Colombia's legislation, 15.5% of the samples exceeded the maximum level of 1.0 µg g(-1) for mercury and 18.3% was higher than limits as recommended by Food and Agriculture Organization/World Health Organisation (0.5 µg g(-1)). It was concluded that consumption of canned tuna could represent a high risk for the Colombian population, particularly to vulnerable groups.

  1. Acanthocephalan (Echinorhynchus sp. infection of yellowfin tuna (Thunnus albacares from Nagapattinam, south east coast of India

    Directory of Open Access Journals (Sweden)

    Alagarsamy Sakthive

    2014-08-01

    Full Text Available Objective: To recored the infection of Acanthocephalan parasite, (Echinorhynchus sp. in adult yellowfin tuna (Thunnus albacares. This is the first report of acanthocephalan Echinirhynchus sp attached to yellowfin tuna and moreover prevalence, mean intensity and mean abundance was observed. Methods: Totally 1 001 yellowfin tuna fishes were collected throughout the year of 2012 from the coast of Nagapattinam (10°45' 36.25" N and 79°50' 59.54" E, Tamil Nadu, India. The collected fishes were washed with fresh water to remove debris and immediately stored in ice, and brought to the laboratory. Intestines were placed in normal saline (0.85% NaCl. The worms were fixed in alcohol/ formalin /(AFA fixative and in 70% ethanol until processed for identification. Results: Totally 1 001 yellowfin tuna was examined out of 387 (52.67% hosts were infected with acanthocephalan (Echinorhynchus sp.. The proboscis Echinorhynchus sp. was long, cylindrical with cylindrical with a uniform width measured (0.41±0.02 mm in length and (0.12±0.03 mm in width. The endo parasite prevalence, intensity and abundance was recorded as 52.67%, 12.46%, and 5.43% respectively. Conclusions: This current phenomena was carried out to report of acanthocephalan Echinorhynchus sp. attached the new host of yellowfin tuna from Nagapattinam coast. Moreover, parasitological investigations are required to determine endo parasites of host due to its importance and numerous occurring among most important marine food fishes in world wild.

  2. Screening of biodiesel production from waste tuna oil (Thunnus sp.), seaweed Kappaphycus alvarezii and Gracilaria sp.

    Science.gov (United States)

    Alamsjah, Mochammad Amin; Abdillah, Annur Ahadi; Mustikawati, Hutami; Atari, Suci Dwi Purnawa

    2017-09-01

    Biodiesel has several advantages over solar. Compared to solar, biodiesel has more eco-friendly characteristic and produces lower greenhouse gas emissions. Biodiesel that is made from animal fats can be produced from fish oil, while other alternative sources from vegetable oils are seaweed Kappaphycus alvarezii and Gracilaria sp. Waste tuna oil (Thunnus sp.) in Indonesia is commonly a side product of tuna canning industries known as tuna precook oil; on the other hand, seaweed Gracilaria sp. and Kappaphycus alvarezii are commonly found in Indonesia's seas. Seaweed waste that was used in the present study was 100 kg and in wet condition, and the waste oil was 10 liter. The seaweed was extracted with soxhletation method that used n-hexane as the solvent. To produce biodiesel, trans esterification was performed on the seaweed oil that was obtained from the soxhletation process and waste tuna oil. Biodiesel manufactured from seaweed K. alvarezii obtained the best score in flash point, freezing point, and viscosity test. However, according to level of manufacturing efficiency, biodiesel from waste tuna oil is more efficient and relatively easier compared to biodiesel from waste K. alvarezii and Gracilaria sp.

  3. Application of the Oxidation-Reduction Potential (ORP) for Pre-grading Tuna Freshness On-board

    Science.gov (United States)

    Cheevaporanapivat, Mongkol; Sakai, Hisaharu; Mine, Yuuji; Watanabe, Manabu; Suzuki, Toru

    Application of ORP as a rapid indicator for grading tuna's freshness on the ship was studied. The long line trawling process was used for catching the sample tuna in the South Pacific Ocean. All captured sample tuna were weighed, gender identified and investigated for their mortality, then measured ORP and K value. Three species of tuna were caught: blue marlin (Makaira mazara), yellow fin tuna (Thunnus albacares), and swordfish (Xiphia gladius). Most of the fish captured were male and they had been dead after picking onboard. The measured ORP values of blue marlin varied in the range of 0.295-0.362 Volt, with pH between 5.35-5.84. Both ORP and pH of swordfish was similar to that of blue marlin. But for yellow fin tuna, the ORP value was about the same as blue marlin while its pH was significantly higher. ORP value in all species tended to increase with pH of the fish meat decrease. It is interesting that ORP value of tuna increased in correlation with K value. These results suggested that ORP and pH change, which are measured in the short time, are the effective indicators for grading tuna's freshness on-board.

  4. Génesis de la medicina familiar en Las Tunas

    Directory of Open Access Journals (Sweden)

    Maritza Rodríguez Peña

    2014-08-01

    Full Text Available Se realizó una investigación desde los presupuestos de la historia social integral, con el objetivo de analizar momentos importantes de la historia de la medicina familiar en la localidad de Las Tunas. Para la investigación se consultaron diversas fuentes documentales, orales, iconográficas, patrimoniales y bibliográficas, entre ellas la obra de los historiadores de la ciudad y del Ministerio de Salud Pública, así como resultados científicos de proyectos de investigación. Los métodos empleados partieron de la observación, el análisis histórico-lógico, la síntesis, la inducción y la deducción de la información, que permitieron la sistematización y determinación de los momentos más importantes de este proceso desde su origen en la comunidad primitiva, transitando por diferentes etapas hasta 1984, con la puesta en práctica del Programa del Médico y la Enfermera de la Familia, para el fortalecimiento de la atención primaria de salud, con marcado acento preventivo

  5. Experimental Study on Oscillating Wing for Propulsor with Bending Mechanism Modeled on Caudal Muscle-Skeletal Structure of Tuna

    Science.gov (United States)

    Morikawa, Hirohisa; Nakao, Seitaroh; Kobayashi, Shun-Ichi

    The purpose of our study is to investigate the effect of the caudal fin behavior resulting from the caudal muscle-skeletal structure of tuna on the propulsive force. A propulsion system by tuna-like fin stroke using two air rubber artificial muscles and a multi-joint bending mechanism (a tuna-like bending mechanism) modeled on the antagonism muscles and the caudal skeletal structure of tuna was developed. In order to realize instructed oscillation of a wing, a method of continuous path follow-up control of a wing in water was discussed in regard to the control of the internal pressure of the artificial muscles. It was found that the optimum control method for the tuna-like bending mechanism was the pressure control of the artificial muscles with both feedforward and pressure feedback compensations. The propulsion performance on a deformable wing using the propulsion system was discussed.

  6. Inshore capture-based tuna aquaculture impact on Posidonia oceanica meadows in the eastern part of the Adriatic Sea.

    Science.gov (United States)

    Kružić, Petar; Vojvodić, Vjeročka; Bura-Nakić, Elvira

    2014-09-15

    Mapping and monitoring of the seagrass Posidonia oceanica in the eastern (Croatian) part of the Adriatic Sea since 2004 indicates a significant decline in meadow density in an area impacted by inshore capture-based tuna aquaculture. The density and overall condition of P. oceanica meadows impacted by tuna farms near Fulija Islet was compared to two reference sites (Iž Island and Mrtovnjak Islet). The factors with the most significant influence on P. oceanica meadows were found to be the input of organic matter originating from the cages, as well as high epiphyte biomass caused by nutrient enrichment. Significant differences in nutrient concentrations were found between the sites impacted by tuna farms (Fulija Islet) and the control stations. Shoot density of the P. oceanica meadows decreased at the stations in close vicinity to the tuna farm, which suggests that the tuna farm activity strongly affected the surrounding meadows. Copyright © 2014 Elsevier Ltd. All rights reserved.

  7. DYNAMICS OF GEARS, FLEETS, CATCH AND FISHING SEASON OF SMALLSCALE TUNA FISHERIES IN LABUHAN LOMBOK, WEST NUSA TENGGARA

    Directory of Open Access Journals (Sweden)

    Bram Setyadji

    2015-12-01

    Full Text Available In Indonesia, about 80% of fishing activities are small-scale and play major role both economically and socially. Previous studies mostly concentrated in Java, while in eastern part of Indonesia the information still scarce and limited. The study was conducted from January to December 2013, describes in detail the gears, fleets and catch dynamics of the small-scale tuna fisheries operating based in Labuhan Lombok Coastal Fishing Port (PPP. Labuhan Lombok. Small-scale tuna fishery in Labuhan Lombok are characterized by the small boats less than 10 GT, operating both troll line and hand line simultaneously, targeting large tuna, skipjack tuna and small tuna. Fishing season starts from April to August and influence by southwest monsoon wind and the presence of middleman as the connector between fishers and the market are the main character of the small-scale fisheries business in this area.

  8. Present and future potential habitat distribution of Carcharhinus falciformis and Canthidermis maculata by-catch species in the tropical tuna purse-seine fishery under climate change

    Directory of Open Access Journals (Sweden)

    Nerea eLezama Ochoa

    2016-03-01

    Full Text Available By-catch species from tropical tuna purse seine fishery have been affected by fishery pressures since the last century; however, the habitat distribution and the climate change impacts on these species are poorly known. With the objective of predicting the potential suitable habitat for a shark (Carcharhinus falciformis and a teleost (Canthidermis maculata in the Indian, Atlantic and Eastern Pacific Oceans, a MaxEnt species distribution model (SDM was developed using data collected by observers in tuna purse seiners. The relative percentage of contribution of some environmental variables (depth, sea surface temperature, salinity and primary production and the potential impact of climate change on species habitat by the end of the century under the A2 scenario (scenario with average concentrations of carbon dioxide of 856 ppm by 2100 were also evaluated. Results showed that by-catch species can be correctly modelled using observed occurrence records and few environmental variables with SDM. Results from projected maps showed that the equatorial band and some coastal upwelling regions were the most suitable areas for both by-catch species in the three oceans in concordance with the main fishing grounds. Sea surface temperature was the most important environmental variable which contributed to explain the habitat distribution of the two species in the three oceans in general. Under climate change scenarios, the largest change in present habitat suitability is observed in the Atlantic Ocean (around 16% of the present habitat suitability area of Carcharhinus falciformis and Canthidermis maculata, respectively whereas the change is less in the Pacific (around 10% and 8% and Indian Oceans (around 3% and 2 %. In some regions such as Somalia, the Atlantic equatorial band or Peru’s coastal upwelling areas, these species could lose potential habitat whereas in the south of the equator in the Indian Ocean, the Benguela System and in the Pacific coast of

  9. Leaching of Oil from Tuna Fish Liver by Using Solvent of Methyl-Ethyl Ketone

    Directory of Open Access Journals (Sweden)

    Mirna Rahmah Lubis

    2013-12-01

    Full Text Available Research of oil leaching from Tuna Fish Liver has been carried out by extracting of tuna fish liver in soxhlet by using methyl-ethyl ketone as solvent. Liver of fresh tuna fish is blended, put into soxhlet, and extracted at temperatures of 60oC, 65oC, 70oC, 75oC, and 80oC. After obtaining the oil, separation between solvent and oil is carried out by distillation. Oil obtained is analyzed by testing the yield, acid number, Iodine value, viscosity, and its impurities content. Yield obtained is influenced by temperature and time of leaching. Both variables indicates that the higher the variables, the more fish liver oil obtained. Maximum yield obtained is 25.552% at operating condition of leaching temperature 80oC, and leaching duration of 5 hours.

  10. Positive reform of tuna farm diving in South Australia in response to government intervention.

    Science.gov (United States)

    Whyte, P; Doolette, D J; Gorman, D F; Craig, D S

    2001-02-01

    Much of the tuna harvested in South Australia since 1990 has involved "farming" techniques requiring the use of divers. From 1993 to 1995, 17 divers from this industry were treated for decompression illness (DCI). In response, the State Government introduced corrective strategies. A decrease in the number of divers presenting for treatment was subsequently recorded. Consequently, the hypothesis was tested that the government intervention resulted in a decrease in the incidence of DCI in the industry and an improved clinical outcome of divers with DCI. The incidence of treated DCI in tuna farm divers was estimated from the number of divers with DCI treated and the number of dives undertaken extrapolated from a survey of the industry in 1997-8. General health was measured in the tuna farm diving population by a valid and reliable self assessment questionnaire. The outcome of the divers treated for DCI was analysed with a modified clinical severity scoring system. The apparent incidence of treated DCI has decreased in tuna farm divers since the government intervention. The evidence supports a truly decreased incidence rather than underreporting. The general health of the tuna farm divers was skewed towards the asymptomatic end of the range, although health scores indicative of DCI were reported after 1.7% of the dives that did not result in recognised DCI. The clinical outcome of the divers treated since the intervention has improved, possibly because of earlier recognition of the disease and hence less time spent diving while having DCI. The government intervention in the tuna industry in South Australia has resulted in a reduced incidence of DCI in the industry.

  11. U.S. Tuna Fisheries: a trifecta of sustainable practices at odds with climate change mitigation

    Science.gov (United States)

    McKuin, B.; Campbell, J. E.

    2016-12-01

    Environmental concerns have given rise to eco-label initiatives in the seafood industry and a shift to more sustainable fishing practices in the U.S. Currently, the greenhouse gas emissions of fisheries are being considered in the sustainability criteria of the consumer advocacy group Seafood Watch. We looked at sustainable practices employed by U.S. tuna fisheries and find the term "sustainably sourced" changes when climate forcing is added to the criteria. Specifically, there are three sustainable practices at odds with climate change mitigation: 1) the use of selective fishing gear reduces bycatch but increases fuel use; 2) fishing within exclusive economic zones is more equitable to coastal fishermen, and allows the high seas to serve as an ecological bank, but fishing within these regions means fisheries are subject to more stringent fuel sulfur laws thereby diminishing the cooling effects of sulfate aerosols and increasing climate forcing; and 3) removing sulfur from fuels improves air quality but there are added emissions from the refinery process. We used ship registry data, historical sulfur levels in fuels, gear-specific fishery fuel use data collected from the literature, historical gear-specific tuna landings data, and a range of global warming potentials to estimate the climate forcing of U.S. tuna fisheries over the last fifteen years. We found that for tuna caught within exclusive economic zones, the net fuel-related climate forcing has more than doubled over the last fifteen years. We also normalized the fuel-related climate forcing results to a unit of tuna protein and compared these results to other farmed sources of protein. We found that tuna caught within exclusive economic zones has the highest climate impact of all land-based protein sources considered, with the exception of beef. Our results can inform policy makers and consumer advocacy groups which is an important step in communicating the climate impact of dietary choices to consumers.

  12. Feasibility of Solid Waste Tuna Loin of Yellowfin Thunnus albacares Raw Materials for The Product Diversification

    Directory of Open Access Journals (Sweden)

    Wayan Kantun Kantun

    2015-10-01

    Full Text Available Indonesia is one country in the world exporters of tuna in the form of fresh, frozen andprocessed. Tuna exported in processed form large enough to leave waste for exporting companies.The purpose of this study was to determine a feasibility study on solid waste exported tuna loin forraw material diversification. This research was conducted in Majene Makassar Strait. The study wasconducted using descriptive exploratory method by taking a sample of 3 times and each samplewas tested 3 times resulting in 9 times of testing for each of the observed variables. Chemical testwhich includes moisture, protein, fat, ash, carbohydrates, and histamine. Microbiological test thatis E. coli, Salmonella and the total number of bacteria. Data were analyzed by descriptive qualitativeand quantitative display via Tables, Graphics and Image in the form of average value. The resultsshowed that the chemical solid waste tuna loin has a water content ranged from 78.34 to 78.78%,protein content ranged from 14.32 to 16.41%, fat ranged from 1.56 to 1.66%, ash content rangedfrom 5.18 to 5. 58%, carbohydrate content ranged from 1.29 to 1.34%, and histamine ranged from2.08 to 3.21 mg / kg. Solid waste microbiologically tuna loin contains E.coli range from 1.2 to 1.9(<2, Salmonella negative and TPC ranged from 1.4 to 1.8 x 105 kol/g. The results of chemical andmicrobiological testing showed solid waste tuna loin still suitable as raw material diversificationproducts.

  13. Biogenic amine content, histamine-forming bacteria, and adulteration of pork in tuna sausage products.

    Science.gov (United States)

    Kung, Hsien-Feng; Tsai, Yung-Hsiang; Chang, Shih-Chih; Hong, Tang-Yao

    2012-10-01

    Twenty-five tuna sausage products were purchased from retail markets in Taiwan. The rates of occurrence of biogenic amines, histamine-forming bacteria, and adulteration by pork and poultry were determined. The average content of various biogenic amines in all tested samples was less than 2.0 mg/100 g (fish species in the tuna sausage samples were identified as Thunnus albacares for 22 samples (88%), Thunnus alalunga for 1 sample (4%), and Thunnus thynnus for 1 sample (4%), whereas the remaining sample was identified as Makaira nigricans (blue marlin).

  14. Relationships between tuna catch and variable frequency oceanographic conditions

    Directory of Open Access Journals (Sweden)

    F. I. Ormaza-González

    2016-08-01

    Full Text Available Skipjack (Katsuwunus pelamis, yellow fin (Thunnus albacares and albacore (Thunnus alulunga tunas landed in the Eastern Pacific Ocean (EPO countries and Ecuador were correlated to the Indexes Oceanic El Niño (ONI and Multivariate Enso Index (MEI. The temporal series 1983–2012, and 1977–1999 (warm Pacific Decadal Oscillation, PDO, and 2000–2012 (cold PDO were analyzed. Linear correlation showed that at least 11 % of the total landings were associated with the MEI, with a slightly negative gradient from cold to warm conditions. When non-linear regression (n  =  6, the R2 was higher up to 0.304 (MEI, r =  0.551. The correlation shows high spread from −0.5 to +0.5 for both MEI/ONI; the highest landings occurred at 0.34–0.45; both indexes suggested that at extreme values < −1.0 and > 1.1 total landings tend to decrease. Landings were associated up to 21.9 % (MEI in 2000–2012, 1983–1999 rendered lower R2 (< 0.09; i.e., during cold PDO periods there was a higher association between landings and oceanographic conditions. For the non-linear regression (n  =  6 a R2 of 0.374 (MEI and 0.408 (ONI were registered, for the 2000–2012, a higher R2 was observed in 1983–1999, 0.443 and 0.711 for MEI and ONI respectively, suggesting that is better to analyze split series (1983–1999, 2000–2012 than as a whole (1983–2012, due to noise produced by the transition from hot to cold PDOs. The highest landings were in the range −0.2 to 0.5 for MEI/ONI. The linear regression of skipjack landings in Ecuador gave an R2 of 0.140 (MEI and 0.066 (ONI and the non-linear were 0.440 and 0.183 respectively. Total landings in the EPO associated to oceanographic events of high and low frequencies could be used somehow as predictors of the high El Niño o La Niña. There is a clear evidence that tuna fish biomass are at higher levels when the PDO is on cold phase (2000–2030 and vice versa on warm phase (1980–1999. The

  15. FLUKTUASI DAN KOMPOSISI HASIL TANGKAPAN TUNA NERITIK TERTANGKAP JARING INSANG DI PERAIRAN LAUT CINA SELATAN

    Directory of Open Access Journals (Sweden)

    Arief Wujdi

    2016-03-01

    Full Text Available Saat ini tuna neritik merupakan komoditas penting perikanan di Indonesia, namun ketersediaan data dan informasi hasil tangkapan jenis tuna ini masih tergolong kurang. Penelitian ini bertujuan untuk memperoleh informasi mengenai sebaran daerah penangkapan, fluktuasi hasil tangkapan tuna neritik yang tertangkap jaring insang yang beroperasi di Laut Cina Selatan. Pengumpulan data dilakukan melalui program enumerasi monitoring hasil tangkapan harian di Pemangkat pada tahun 2011-2012. Hasil menunjukkan daerah penangkapan tersebar di perairan Laut Cina Selatan pada koordinat 01°03’ LS-04°57’ LU; dan 104°65’-110°00’ BT. Hasil tangkapan jenis tuna neritik menunjukan variasi yang cenderung sama dimana puncak hasil tangkapan terjadi pada bulan Oktober dan November. Pola CPUE berfluktuasi dan cenderung mengalami peningkatan dan puncaknya terjadi pada bulan November 2011 dan 2012, yaitu 402,85 dan 444,57 kg/hari/trip. Secara statistik hasil tangkapan pada periode 2011-2012 tidak berbeda nyata (p<0,05. Komposisi hasil tangkapan bulanan jenis tuna neritik bervariasi berdasarkan atas spesies yang didominasi oleh Euthynnus affinis (49,7% diikuti dengan Thunnus tonggol (33,4%; Scomberomorus commerson (15,9%; dan Scomberomorus guttatus (1%. Kelimpahan Euthynnus affinis terjadi pada musim timur hingga musim peralihan 2 (Juni- November, sedangkan kelimpahan Thunnus tonggol terjadi pada musim barat (Januari-Februari. Nowadays, neritic tuna just become an important commodity Indonesia. However, the information about catch of tuna neritic species in Indonesia still quite lacks. This This study aims to obtain information about catch fluctuation, monthly catch per unit of effort, and catch composition of neritic tuna species caught by gill net operated in the South China Sea. Data was collected by daily catch monitoring program by enumerator in Pemangkat during period 2011-2012. The result showed that gillnetter fishing ground is scattered between 01°03

  16. Trophic position increases with thermocline depth in yellowfin and bigeye tuna across the Western and Central Pacific Ocean

    Science.gov (United States)

    Houssard, Patrick; Lorrain, Anne; Tremblay-Boyer, Laura; Allain, Valérie; Graham, Brittany S.; Menkes, Christophe E.; Pethybridge, Heidi; Couturier, Lydie I. E.; Point, David; Leroy, Bruno; Receveur, Aurore; Hunt, Brian P. V.; Vourey, Elodie; Bonnet, Sophie; Rodier, Martine; Raimbault, Patrick; Feunteun, Eric; Kuhnert, Petra M.; Munaron, Jean-Marie; Lebreton, Benoit; Otake, Tsuguo; Letourneur, Yves

    2017-05-01

    Estimates of trophic position are used to validate ecosystem models and understand food web structure. A consumer's trophic position can be estimated by the stable nitrogen isotope values (δ15N) of its tissue, once the baseline isotopic variability has been accounted for. Our study established the first data-driven baseline δ15N isoscape for the Western and Central Pacific Ocean using particulate organic matter. Bulk δ15N analysis on 1039 muscle tissue of bigeye and yellowfin tuna were conducted together with amino acid compound-specific δ15N analysis (AA-CSIA) on a subset of 21 samples. Both particulate organic matter and tuna bulk δ15N values varied by more than 10‰ across the study area. Fine-scaled trophic position maps were constructed and revealed higher tuna trophic position (by ∼1) in the southern latitudes compared to the equator. AA-CSIA confirmed these spatial patterns for bigeye and, to a lesser extent, yellowfin tuna. Using generalized additive models, spatial variations of tuna trophic positions were mainly related to the depth of the 20°C isotherm, a proxy for the thermocline behavior, with higher tuna trophic position estimates at greater thermocline depths. We hypothesized that a deeper thermocline would increase tuna vertical habitat and access to mesopelagic prey of higher trophic position. Archival tagging data further suggested that the vertical habitat of bigeye tuna was deeper in the southern latitudes than at the equator. These results suggest the importance of thermocline depth in influencing tropical tuna diet, which affects their vulnerability to fisheries, and may be altered by climate change.

  17. 50 CFR 300.185 - Documentation, reporting and recordkeeping requirements for consignment documents and re-export...

    Science.gov (United States)

    2010-10-01

    ... portions are subsequently packaged for domestic commercial use or re-export, the BCD tag number and the... requiring a BCD tag on all such bluefin tuna available for sale, must be accompanied by the appropriate BCD tag issued by that country, and said BCD tag must remain on any bluefin tuna until it reaches its...

  18. CONCENTRATION AND RECOVERY OF PROTEIN FROM TUNA COOKING JUICE BY FORWARD OSMOSIS

    Directory of Open Access Journals (Sweden)

    KHONGNAKORN W.

    2016-07-01

    Full Text Available Tuna cooking processing plants generate large amount of cooking juice containing a significant content of protein. Recovery and concentrating process of this valuable compound together with a low energy consumption process are of interest regarding full utilization concept and green process approach. Forward osmosis (FO was employed in this work to recover and concentrate tuna cooking juice. FO process could increase the protein concentration up to 9% with an average permeate flux of 2.54 L/m2h. The permeate flux however tended to decrease as protein concentration increased due to the impact of osmotic pressure of the feed and fouling on the membrane surface. Since tuna cooking juice consists of protein and minerals, membrane analyses indicated that fouling was more severe compared to the fouling caused by standard bovine serum albumin pure protein. However, the presence of minerals rendered it a quicker and lower energy process by comparison. These results indicated that FO is a promising technique in the recovery and concentration of tuna cooking juice protein.

  19. 76 FR 31351 - Safety Requirements and Manning Exemption Eligibility on Distant Water Tuna Fleet Vessels

    Science.gov (United States)

    2011-05-31

    ... exemption. For instance, the law requires that there be non-availability of United States licensed workers... allow a distant water tuna fleet vessel to engage foreign citizens under a temporary manning exemption... available in the docket and can be viewed by going to http://www.regulations.gov , inserting USCG- 2011-1146...

  20. Cytochrome Oxidase I (COI) sequence conservation and variation patterns in the yellowfin and longtail tunas

    Digital Repository Service at National Institute of Oceanography (India)

    Kunal, S.P.; GirishKumar

    and temperate waters of Indo-Pacific region. Thunnus tonggol is a commercially important fishery with its great demand in export market. Global catch rose to 233,830 t in 2009 [4](FAO, 2010), while in Indian waters it is 9% (6111 metric tonne) of all tuna...

  1. Synthesis of Monoacylglycerol Rich in Polyunsaturated Fatty Acids from Tuna Oil with Immobilized Lipase AK

    DEFF Research Database (Denmark)

    Pawongrat, Ratchapol; Xu, Xuebing; H-Kittikun, Aran

    2007-01-01

    The aim of this study was to produce monoacylglycerols (MAG) rich in polyunsaturated fatty acids (PUFA), especially eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), by glycerolysis of tuna oil with lipase AK from Pseudomonas fluorescence immobilized on Accurel EP-100 (IM-AK). tert......-Butyl methyl ether (MTBE) was the most suitable organic solvent after screening a list of different solvents and their mixtures. The optimum conditions for MAG production were: 10% w/v of tuna oil in MTBE; mole ratio of glycerol to tuna oil 3:1, water added 4 wt% in glycerol; the amount of IM-AK 30 wt%, based...... on tuna oil. The temperature was controlled at 45 degrees C. Under these conditions, with a 24 h reaction, the yield of MAG was 24.6%, but containing 56.0 wt% PUFA (EPA and DHA). Stability of the IM-AK was also studied. The hydrolytic activity of the enzyme remained at 88% and 80% of initial activity...

  2. Relationship between sea surface temperatures and dolphin-associated fishing activities by the Mexican tuna fleet

    OpenAIRE

    Gomez-Muñoz, V.M.

    1992-01-01

    Data from the Mexican purse seiner fleet operating in the eastern Tropical Pacific, for the year 1985-1990, are used to show that the fraction of surface schools of yellowfin tuna Thunnus albacares associated with dolphins (Stenella attenuata and others) increases with sea surface temperature. Possible reasons for this correlation are briefly discussed.

  3. Feeding Partitioning among Tuna Taken in Surface and Mid-water ...

    African Journals Online (AJOL)

    Feeding Partitioning among Tuna Taken in Surface and Mid-water Layers: The Case of Yellowfin (Thunnus albacares) and Bigeye (T. obesus) in the Western Tropical Indian Ocean. M Potier, F Marsac, V Lucas, R Sabatié, J-P Hallier, F Ménard ...

  4. Uncertainty in catch and effort data of small- and medium-scale tuna fisheries in Indonesia

    NARCIS (Netherlands)

    Yuniarta, Shinta; Zwieten, van Paul A.M.; Groeneveld, Rolf A.; Wisudo, Sugeng Hari; Ierland, van E.C.

    2017-01-01

    This study aims to identify the sources and magnitude of uncertainty in the collection and processing of catch and effort data of small- and medium-scale tuna fisheries in Indonesia, as well as the causes of uncertainty on an operational level. We identified possible sources of uncertainty

  5. Age and growth of bullet tuna, Auxis rochei (Risso), from the Turkish ...

    African Journals Online (AJOL)

    The study aims to identify the age and growth parameters of bullet tuna (Auxis rochei) in Turkish waters. The fish were caught from the Turkish Mediterranean coasts between December 2008 and December 2009. A total of 186 dorsal fin spines obtained from the specimens were analyzed for ageing and growth studies.

  6. Seabird bycatch by tuna longline fisheries off South Africa, 1998-2000

    African Journals Online (AJOL)

    The incidental mortality of seabirds in tuna longline fisheries is estimated for the continental South African Exclusive Economic Zone (EEZ). Fishery observers accompanied 13 fishing trips and observed 108 sets (143 260 hooks) during the period 1998–2000. Despite most lines being set at night, seabird bycatch rates were ...

  7. Closing the Incentive Gap: The Role of Public and Private Actors in Governing Indonesia's Tuna Fisheries

    NARCIS (Netherlands)

    Bailey, M.L.; Miller, A.M.M.; Bush, S.R.; Zwieten, van P.A.M.; Wiryawan, B.

    2016-01-01

    Indonesia is one of the world's largest tuna producing countries, yet regulatory oversight remains weak and management is poor. Incentive-based approaches are a way to improve state-based resource management, but they often require strong government regulation. In this paper, we use principal–agent

  8. Commentary: BESTTuna: Benefiting from Equitable and Sustainable Trans-boundary Tuna fisheries in the Western Pacific

    NARCIS (Netherlands)

    Bush, S.R.; Zwieten, van P.A.M.; Bailey, M.L.

    2013-01-01

    In this commentary we introduce the BESTTuna research programme which addresses the challenges of governing sustainable and equitable tuna fisheries in the Western Pacific. The research in this programme attempts to build an inter-disciplinary understanding of the complex social-ecological

  9. Examining dolphin hydrodynamics provides clues to calf-loss during tuna fishing

    OpenAIRE

    Moore, Pete

    2004-01-01

    A combination of mathematical modeling and direct observation of the swimming behavior of dolphin mother-calf pairs has shown how the calf can gain much of the energy required for swimming if it is positioned correctly relative to the mother, a situation that may be disrupted during the chases that result from tuna-fishing practices.

  10. Pelagic shark bycatch in the tuna- and swordfish-directed longline ...

    African Journals Online (AJOL)

    The capture of pelagic sharks as bycatch of the South African pelagic longline fleet targeting tuna Thunnus spp. and swordfish Xiphias gladius was investigated during the period 1998–2005. In all, 26 species were caught, of which six are listed by the International Union for Conservation of Nature (IUCN) as Vulnerable and ...

  11. Reducing the Bitterness of Tuna (Euthynnus pelamis Dark Meat with Lactobacillus casei subsp. casei ATCC 393

    Directory of Open Access Journals (Sweden)

    Ernani S. Sant’Anna

    2004-01-01

    Full Text Available During the process of canning tuna fish, considerable amounts of dark tuna meat are left over because of its bitterness, which are then used in the production of animal food. Fermentation with Lactobacillus casei subsp. casei ATCC 393 was used as an alternative to reduce this bitter taste. Samples of meat were prepared, vacuum packed and then stored at –18 °C. The frozen dark meat was used immediately after defrosting and the experiment was carried out with 2 and 4 % of NaCl with the addition of 2 and 4 % of glucose, respectively. The dark tuna meat was inoculated with lactic acid bacteria (LAB and fermented at 10 °C for 30 days. The fermentation process was monitored through bacteriological and chemical analyses, when an increase of acidity and the corresponding decrease of pH were observed due to the prevalence of LAB. Sensorial analysis, using a test of multiple comparison, was carried out with pastes of fermented dark tuna meat and presented a significant difference when compared to the paste control, indicating the reduction of bitter taste.

  12. Gender Transformations and Colonial Displacements in Laura Antillano's "Tuna de mar"

    Science.gov (United States)

    Reid, Alana

    2015-01-01

    This paper examines the trajectories of two characters in Laura Antillano's short story, "Tuna de mar" (1991), as they navigate interrelated systems of power and attempt to position themselves closer to, or further away from, the margins. Set in the late eighteenth century, the tale features a female protagonist who escapes prostitution…

  13. Size Composition Of Skipjack Tuna Katsuwonus Pelamis In Three Region Fisheries Management In Bitung Ocean Fishery Port

    Directory of Open Access Journals (Sweden)

    Asia

    2015-01-01

    Full Text Available Abstract The aim of research is to know the size composition of lenght and weight of skipjack tuna Katsuwonus pelamis caught in three region fisheries management i.e. WPP 714 WPP 715 and WPP 716. Its result indicate that the size composition measure of skipjack tuna were caught in three WPP different each other. In WPP 714 was domination of size measure 38 cm - 44 cm WPP 715 domination by 32 cm and WPP 716 predominated the size measure 38 cm.. The relationship between lenght and weight of skipjack tuna are the important information for development and sustainability of fish management.

  14. PERFORMA PEMIJAHAN IKAN TUNA SIRIP KUNING, Thunnus albacares DI KERAMBA JARING APUNG

    Directory of Open Access Journals (Sweden)

    Jhon Harianto Hutapea

    2017-05-01

    Full Text Available Ikan tuna sirip kuning merupakan komoditas ekspor yang bernilai ekonomis tinggi yang populasinya semakin menurun di alam. Penelitian ini dilaksanakan di Balai Besar Penelitian dan Pengembangan Budidaya Laut, Gondol dan bertujuan untuk mengetahui performa pemijahan ikan tuna sirip kuning yang dipelihara di dalam keramba jaring apung. Sebanyak 100 ekor induk ikan tuna dengan ukuran bobot sekitar 15-30 kg dipelihara dalam keramba sejak tahun 2014. Induk ikan diberi pakan berupa ikan layang dan cumi-cumi dengan rasio 2:1 dua kali sehari (pagi dan sore hari. Pengamatan yang dilakukan meliputi tingkah laku induk, pemijahan, dan keragaan telur yang dihasilkan, serta kualitas air terutama suhu dan oksigen dilakukan setiap hari. Induk ikan memijah untuk pertama kalinya terjadi pada tahun 2015. Selanjutnya pemijahan terjadi hampir setiap malam hari dengan jumlah telur yang dapat dikumpulkan berkisar 30.000-3.600.000 butir. Daya tetas telur yang diperoleh berkisar 26%-96%, dengan ketahanan hidup larva tanpa pakan (survival activity index-SAI berkisar 0,1-3,8. Berdasarkan hasil pengamatan ini dapat disimpulkan bahwa induk ikan tuna sirip kuning umur dua tahun dapat memijah di keramba jaring apung dan menghasilkan performa pemijahan yang baik. Yellowfin tuna is an export commodity and high economic value but its population tend to decrease. The research was conducted at Institute for Mariculture Research and Development of Indonesia. The purpose of this study was to observe the spawning performance of yellowfin tuna in floating net cage. The study was started in 2014 using 100 broodstock with estimated weight range of 15-30 kg. Feed supplied for broodstock were scad mackerel and squid with 2:1 ratio and was given twice a day in the morning and afternoon. The observations included broodstock behavior, spawning, egg performance, and daily morning of water quality (temperature and dissolve oxygen. First spawning was observed in January, 2015, where eggs were

  15. Mercury Poisoning in a Fisherman Working on a Pelagic Fishing Vessel Due to Excessive Tuna Consumption.

    Science.gov (United States)

    Ahn, Ji-Sung; Wook Kang, Kyung; Kang, Won-Yang; Lim, Hyeong-Min; Cho, Seunghyeon; Moon, Jai-Dong; Park, Won-Ju

    2017-11-01

    To report the case of a fisherman who developed chronic mercury poisoning due to excessive consumption of tuna while working on a pelagic fishing vessel. A 48-year-old male deep-sea fisherman developed paresthesia and pain in both legs while working at sea. He continued working for over 4 months on a pelagic fishing vessel but was eventually unable to function normally as his condition deteriorated. Upon arrival on land, he received specialist treatment, including imaging studies, for 2 months; however, the cause of the symptoms was not identified. An examination of his occupational history revealed that he had worked as a crew member on a pelagic fishing vessel catching tuna for the last 2 years and consumed tuna for two or more meals per day, every day. Two months after discontinuation of tuna consumption, he was tested for mercury. The result showed an elevated blood mercury level (BML) of 21.79 μg/L. Based on the half-life of mercury, the BML was evaluated as 38.70-53.20 μg/L when he was on board. Four months after discontinuing tuna consumption, his BML decreased to 14.18 μg/L, and the symptoms were almost ameliorated. The person responsible for preparing meals on a pelagic fishing ship should be aware that fish may contain high levels of heavy metals and should prepare meals for crew members according to the recommended levels. Crew members should also be aware that fish and shellfish may contain mercury, and hence, they should consume only an appropriate amount.

  16. Mercury in tunas and blue marlin in the North Pacific Ocean.

    Science.gov (United States)

    Drevnick, Paul E; Brooks, Barbara A

    2017-05-01

    Models and data from the North Pacific Ocean indicate that mercury concentrations in water and biota are increasing in response to (global or hemispheric) anthropogenic mercury releases. In the present study, we provide an updated record of mercury in yellowfin tuna (Thunnus albacares) caught near Hawaii that confirms an earlier conclusion that mercury concentrations in these fish are increasing at a rate similar to that observed in waters shallower than 1000 m. We also compiled and reanalyzed data from bigeye tuna (Thunnus obesus) and blue marlin (Makaira nigricans) caught near Hawaii in the 1970s and 2000s. Increases in mercury concentrations in bigeye tuna are consistent with the trend found in yellowfin tuna, in both timing and magnitude. The data available for blue marlin do not allow for a fair comparison among years, because mercury concentrations differ between sexes for this species, and sex was identified (or reported) in only 3 of 7 studies. Also, mercury concentrations in blue marlin may be insensitive to modest changes in mercury exposure, because this species appears to have the ability to detoxify mercury. The North Pacific Ocean is a region of both relatively high rates of atmospheric mercury deposition and capture fisheries production. Other data sets that allow temporal comparisons in mercury concentrations, such as pacific cod (Gadus macrocephalus) in Alaskan waters and albacore tuna (Thunnus alalunga) off the US Pacific coast, should be explored further, to aid in understanding human health and ecological risks and to develop additional baseline knowledge for assessing changes in a region expected to respond strongly to reductions in anthropogenic mercury emissions. Environ Toxicol Chem 2017;36:1365-1374. © 2017 SETAC. © 2017 SETAC.

  17. Predicting Interactions between Common Dolphins and the Pole-and-Line Tuna Fishery in the Azores

    Science.gov (United States)

    Cruz, Maria João; Menezes, Gui; Machete, Miguel; Silva, Mónica A.

    2016-01-01

    Common dolphins (Delphinus delphis) are responsible for the large majority of interactions with the pole-and-line tuna fishery in the Azores but the underlying drivers remain poorly understood. In this study we investigate the influence of various environmental and fisheries-related factors in promoting the interaction of common dolphins with this fishery and estimate the resultant catch losses. We analysed 15 years of fishery and cetacean interaction data (1998–2012) collected by observers placed aboard tuna fishing vessels. Dolphins interacted in less than 3% of the fishing events observed during the study period. The probability of dolphin interaction varied significantly between years with no evident trend over time. Generalized additive modeling results suggest that fishing duration, sea surface temperature and prey abundance in the region were the most important factors explaining common dolphin interaction. Dolphin interaction had no impact on the catches of albacore, skipjack and yellowfin tuna but resulted in significantly lower catches of bigeye tuna, with a predicted median annual loss of 13.5% in the number of fish captured. However, impact on bigeye catches varied considerably both by year and fishing area. Our work shows that rates of common dolphin interaction with the pole-and-line tuna fishery in the Azores are low and showed no signs of increase over the study period. Although overall economic impact was low, the interaction may lead to significant losses in some years. These findings emphasize the need for continued monitoring and for further research into the consequences and economic viability of potential mitigation measures. PMID:27851763

  18. Predicting Interactions between Common Dolphins and the Pole-and-Line Tuna Fishery in the Azores.

    Directory of Open Access Journals (Sweden)

    Maria João Cruz

    Full Text Available Common dolphins (Delphinus delphis are responsible for the large majority of interactions with the pole-and-line tuna fishery in the Azores but the underlying drivers remain poorly understood. In this study we investigate the influence of various environmental and fisheries-related factors in promoting the interaction of common dolphins with this fishery and estimate the resultant catch losses. We analysed 15 years of fishery and cetacean interaction data (1998-2012 collected by observers placed aboard tuna fishing vessels. Dolphins interacted in less than 3% of the fishing events observed during the study period. The probability of dolphin interaction varied significantly between years with no evident trend over time. Generalized additive modeling results suggest that fishing duration, sea surface temperature and prey abundance in the region were the most important factors explaining common dolphin interaction. Dolphin interaction had no impact on the catches of albacore, skipjack and yellowfin tuna but resulted in significantly lower catches of bigeye tuna, with a predicted median annual loss of 13.5% in the number of fish captured. However, impact on bigeye catches varied considerably both by year and fishing area. Our work shows that rates of common dolphin interaction with the pole-and-line tuna fishery in the Azores are low and showed no signs of increase over the study period. Although overall economic impact was low, the interaction may lead to significant losses in some years. These findings emphasize the need for continued monitoring and for further research into the consequences and economic viability of potential mitigation measures.

  19. Visualizing the Food-Web Effects of Fishing for Tunas in the Pacific Ocean

    Directory of Open Access Journals (Sweden)

    Jefferson T. Hinke

    2004-06-01

    Full Text Available We use food-web models to develop visualizations to compare and evaluate the interactions of tuna fisheries with their supporting food webs in the eastern tropical Pacific (ETP and the central north Pacific (CNP Oceans. In the ETP and CNP models, individual fisheries use slightly different food webs that are defined by the assemblage of targeted tuna species. Distinct energy pathways are required to support different tuna species and, consequently, the specific fisheries that target different tuna assemblages. These simulations suggest that catches of tunas, sharks, and billfishes have lowered the biomass of the upper trophic levels in both systems, whereas increases in intermediate and lower trophic level animals have accompanied the decline of top predators. Trade-offs between fishing and predation mortality rates that occur when multiple fisheries interact with their respective food webs may lead to smaller changes in biomass than if only the effect of a single fishery is considered. Historical simulations and hypothetical management scenarios further demonstrate that the effects of longline and purse seine fisheries have been strongest in upper trophic levels, but that lower trophic levels may respond more strongly to purse-seine fisheries. The apex predator guild has responded most strongly to longlining. Simulations of alternative management strategies that attempt to rebuild shark and billfish populations in each ecosystem reveal that (1 changes in longlining more effectively recover top predator populations than do changes in purse seining and (2 restrictions on both shallow-set longline gear and shark finning may do more to recover top predators than do simple reductions in fishing effort.

  20. 2005 Atlantic Hurricanes Poster

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The 2005 Atlantic Hurricanes poster features high quality satellite images of 15 hurricanes which formed in the Atlantic Basin (includes Gulf of Mexico and Caribbean...

  1. South Atlantic Shrimp System

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The SEFSC, in cooperation with the South Atlantic states, collects South Atlantic shrimp data from dealers and fishermen. These data are collected to provide catch,...

  2. Conservation Status of Killer Whales, Orcinus orca, in the Strait of Gibraltar.

    Science.gov (United States)

    Esteban, R; Verborgh, P; Gauffier, P; Alarcón, D; Salazar-Sierra, J M; Giménez, J; Foote, A D; de Stephanis, R

    Killer whales (Orcinus orca) in the Mediterranean Sea are currently restricted to the Strait of Gibraltar and surrounding waters. Thirty-nine individuals were present in 2011, with a well-differentiated social structure, organized into five pods. Killer whale occurrence in the Strait is apparently related to the migration of their main prey, Atlantic bluefin tuna (Thunnus thynnus). In spring, whale distribution was restricted to shallow waters off the western coast of the Strait where all pods were observed actively hunting tuna. In summer, the whales were observed in the shallow central waters of the Strait. A relatively new feeding strategy has been observed among two of the five pods. These two pods interact with an artisanal drop-line fishery. Pods depredating the fishery had access to larger tuna in comparison with pods that were actively hunting. The Strait of Gibraltar killer whales are socially and ecologically different from individuals in the Canary Islands. Molecular genetic research has indicated that there is little or no female-mediated gene migration between these areas. Conservation threats include small population size, prey depletion, vessel traffic, and contaminants. We propose the declaration of the Strait of Gibraltar killer whales as an endangered subpopulation. A conservation plan to protect the Strait of Gibraltar killer whales is urgently needed, and we recommend implementation of a seasonal management area where activities producing underwater noise are restricted, and the promotion of bluefin tuna conservation. © 2016 Elsevier Ltd. All rights reserved.

  3. Fisher-Level Decision Making to Participate in Fisheries Improvement Projects (FIPs) for Yellowfin Tuna in the Philippines

    National Research Council Canada - National Science Library

    Tolentino-Zondervan, F; Berentsen, P.B.M; Bush, S.R; Oude Lansink, A.G.J.M

    2016-01-01

    ...) for yellowfin tuna in the Philippines. The current literature provides little empirical evidence on how different models, or types of FIPs, influence the participation of fishers in their programs and the degree which FIPs are able...

  4. FISHING GROUND, CACTH COMPOSITION, HOOK RATE AND LENGTH DISTRIBUTION OF BILLFISHES CAUGHT BY TUNA LONG LINE IN INDIAN OCEAN

    OpenAIRE

    Fathur Rochman; Abram Barata; Budi Nugraha

    2013-01-01

    Billfishes area by cacth of tuna long line vessels in Indian Ocean. Billfish are consist of swordfish Xiphias gladius, black marlin Makaira indica, indo facific blue marlin Makaira mazara, stripe marlin Tetrapturus audax, indo facific sailfish Istiophorus platypterus and shortbill spearfish Tetrapturus angustirostris. Besides that, billfishes also have important economic value compared with tuna as an exsported species such as swordfish and marlin. To optimize the catch of billfishes in India...

  5. SIZE AND FISHING GROUND OFWAHOO (Acanthocybium solandri Cuvier, 1832 FROM CATCH DATA OF TUNA LONGLINE OPERATED IN INDIAN OCEAN

    Directory of Open Access Journals (Sweden)

    Agustinus Anung Widodo

    2012-12-01

    Full Text Available Wahoo (Acanthocybium solandri Cuvier, 1832 is a member of the Scombrid family, is a pelagic (open ocean species found worldwide in tropical and warm-temperate seas. It is fished throughout its range by artisanal, recreational, and commercial. Wahoo is one of the by-product species of the tuna long line fleets operate in Indian Ocean. This paper describes status of wahoo resource caught by tuna long line in Indian Ocean based at Benoa-Bali. Data obtained from onboard observer program on the tuna long liner based at Benoa-Bali during 2005-2010. Total of 85 trips of onboard observation were carried out with the total long line sets (one set per day were 2873 times. The data covered the horizontal and vertical position of tuna long line hooks caught the wahoo, hook rate and fish size distribution. Data of horizontal fishing positions (coordinates gained from the global positioning system availabled in the tuna long liners. The depth of the long line gear in the waters and teperature of waters were measured by mini-loggers TDR type SP2T-1200, brand: NKE Micrel. Hook rate of wahoo is calculated using the Klawe (1986 method. Result of research showed that the wahoos caught by tuna long lines based at Benoa spread horizontally between 1o31’-33o 40’S and 77o18’-117o53’E and spread vertically between the depth of 75.2- 285.7 m. From 85 tuna long line fishing trips, only about 50% of 85 tuna long line fishing trips caught wahoo with hook rate ranged 0.947-1.399 per 1000 hooks/setting. Size distribution of wahoo ranged 70-180cm with modus ranged 101-110cm.

  6. PENGARUH PENGGUNAAN METODE HYPNOTEACHING TERHADAP EMOTIONAL INTELLEGENCE ANAK USIA 3 – 4 TAHUN DI KELOMPOK BERMAIN TUNAS HARAPAN TULUNGAGUNG

    OpenAIRE

    Rohmadheny, Prima Suci

    2015-01-01

    The research was motivated by emotional problems that happened in Playgroup Tunas Harapan Tulungagung. Emotional problems at an early childhood like in there, it would lead to further emotional problems at adults such as suicide. This is a reflection of the low emotional intelligence condition. Objectives to be achieved in this study was to determine whether there is an effect of applying hypnoteaching method on emotional intelligence of children aged 3-4 years in Tunas Harapan Playgroup Tulu...

  7. Significant histamine formation in tuna ( Thunnus albacares ) at 2 degrees C - effect of vacuum- and modified atmosphere-packaging on psychrotolerant bacteria

    DEFF Research Database (Denmark)

    Emborg, Jette; Laursen, B. G.; Dalgaard, Paw

    2005-01-01

    Occurrence and importance of psychrotolerant histamine producing bacteria in chilled fresh tuna were demonstrated in the present study. The objective was to evaluate microbial formation of histamine and biogenic amines in chilled fresh tuna from the Indian Ocean and stored either vacuum-packed (VP......) or modified atmosphere-packed (MAP). Firstly, biogenic amines and the dominating microbiota were determined in VP tuna involved in an outbreak of histamine fish poisoning in Denmark. Secondly, the microbiota of fresh MAP tuna was evaluated at the time of processing in Sri Lanka and chemical, microbial...... and sensory changes were evaluated during storage at 1-3 degrees C. To explain the results obtained with naturally contaminated tuna the effect of VP and MAP on biogenic amine formation by psychrotolerant bacteria was evaluated in challenge tests at 2 degrees C and 10 degrees C. The VP tuna that caused...

  8. Assessment of the seabird community of the Mozambique Channel and its potential use as an indicator of tuna abundance

    Science.gov (United States)

    Le Corre, Matthieu; Jaquemet, Sébastien

    2005-05-01

    Tropical seabirds are known to associate with aggregations of surface dwelling predators, like tunas when feeding. Some species are even regarded as near obligate commensals of tunas. As food is one of the main factors that shape breeding strategies and determine breeding success of seabirds, it is of interest to test the hypothesis that variations in tuna abundance may have effects on foraging success and thus on breeding parameters of tropical seabirds. The Mozambique Channel is appropriate for such a study because relative tuna abundance is assessed annually (through fishery catches) and seabird populations are abundant. A regional synopsis shows that at least 3.034 million pairs of seabirds breed on islands of the Mozambique Channel, 99.3% being sooty terns. This super-abundant seabird is strongly associated with tuna and marine mammals when feeding. More than 99% of the sooty tern population of the Mozambique Channel breeds at three remote coralline islands, namely Juan de Nova (66%), Europa (25%) and Glorieuses (9%). Various breeding parameters (breeding population size, breeding time, growth rate of the chicks, daily food intake, diet) are studied at these three sites in order to investigate their relation to the marine environment (including tuna abundance). A preliminary estimate is made of the quantity of food eaten by the sooty tern population.

  9. Are Consumers Willing to Pay More for Sustainable Products? A Study of Eco-Labeled Tuna Steak

    Directory of Open Access Journals (Sweden)

    Guzhen Zhou

    2016-05-01

    Full Text Available A high demand for seafood leads to overfishing, harms the long-term health of seafood stocks, and threatens environmental sustainability in oceans. Sustainability certification is one of the major sustainability movements and is known as eco-labeling. For instance, in the tuna industry, leading tuna brands have committed to protecting sea turtles by allowing the tracing of the source of their tuna “from catch to can.” This paper relies on an Internet survey on consumers from Kentucky conducted in July 2010. The survey investigates household-level tuna steak (sashimi grade consumption and examines consumer preferences for eco-labeling (“Certified Turtle Safe” (CTS in this study while mimicking individuals’ seafood procurement processes. A random parameter logit model is utilized, and willingness-to-pay measures are calculated based on model estimation results. It was found that respondents on average preferred turtle-safe-labeled tuna steak and were likely to pay more for it; however, they were less likely to purchase wild-caught species, and insignificant results were found for pre-frozen. Moreover, significant heterogeneities were found across individuals regarding tuna steak purchases. The findings indicate evidence of public support for environmental friendliness, particularly with regard to eco-labeling.

  10. Comparison of natural polyphenol antioxidants from extra virgin olive oil with synthetic antioxidants in tuna lipids during thermal oxidation.

    Science.gov (United States)

    Medina, I; Satué-Gracia, M T; German, J B; Frankel, E N

    1999-12-01

    Polyphenols extracted from extra virgin olive oil (EVOO) were tested for their ability to inhibit lipid oxidation of canned tuna. Hydroperoxide formation during oxidation was monitored by measurement of peroxide value and decomposition of hydroperoxides by static headspace gas chromatographic analysis of volatiles. In tuna oxidized at 40 and 100 degrees C, 400 ppm of the EVOO polyphenols was an effective antioxidant as compared with 100 ppm of a 1:1 mixture of the synthetic antioxidants butylated hydroxytoluene and butylated hydroxyanisole. However, at concentrations EVOO phenolic compounds promoted hydroperoxide formation and decomposition. The EVOO polyphenols were effective antioxidants when added to heated tuna muscle in the presence of either brine or refined olive oil. The oxidation rate in tuna muscle packed in brine was higher than that of tuna packed in refined olive oil. The EVOO polyphenols had higher antioxidant activity in the brine samples than in the refined olive oil. The higher antioxidant activity of EVOO polyphenols in tuna packed in brine may be explained by their greater affinity toward the more polar interface between water and the fish oil system.

  11. Oligonucleotide indexing of DNA barcodes: identification of tuna and other scombrid species in food products.

    Science.gov (United States)

    Botti, Sara; Giuffra, Elisabetta

    2010-08-23

    DNA barcodes are a global standard for species identification and have countless applications in the medical, forensic and alimentary fields, but few barcoding methods work efficiently in samples in which DNA is degraded, e.g. foods and archival specimens. This limits the choice of target regions harbouring a sufficient number of diagnostic polymorphisms. The method described here uses existing PCR and sequencing methodologies to detect mitochondrial DNA polymorphisms in complex matrices such as foods. The reported application allowed the discrimination among 17 fish species of the Scombridae family with high commercial interest such as mackerels, bonitos and tunas which are often present in processed seafood. The approach can be easily upgraded with the release of new genetic diversity information to increase the range of detected species. Cocktail of primers are designed for PCR using publicly available sequences of the target sequence. They are composed of a fixed 5' region and of variable 3' cocktail portions that allow amplification of any member of a group of species of interest. The population of short amplicons is directly sequenced and indexed using primers containing a longer 5' region and the non polymorphic portion of the cocktail portion. A 226 bp region of CytB was selected as target after collection and screening of 148 online sequences; 85 SNPs were found, of which 75 were present in at least two sequences. Primers were also designed for two shorter sub-fragments that could be amplified from highly degraded samples. The test was used on 103 samples of seafood (canned tuna and scomber, tuna salad, tuna sauce) and could successfully detect the presence of different or additional species that were not identified on the labelling of canned tuna, tuna salad and sauce samples. The described method is largely independent of the degree of degradation of DNA source and can thus be applied to processed seafood. Moreover, the method is highly flexible

  12. Penggunaan Bakteri Asam Laktat dan Lemak Sapi dalam Pengolahan Limbah Tuna menjadi Sosis Fermentasi

    Directory of Open Access Journals (Sweden)

    Diah Ikasari

    2011-12-01

    Full Text Available Penelitian penggunaan bakteri asam laktat dan lemak sapi dalam pengolahan sosis fermentasi ikan tuna telah dilakukan. Tetelan daging tuna dan lemak sapi yang masing-masing telah halus dicampur dengan konsentrasi lemak sapi 10 dan 20% dari bahan baku. Adonan daging dan lemak kemudian diaduk dengan bumbu dan bakteri asam laktat. Terdapat 3 macam perlakuan bakteri yang digunakan yaitu Lac tobac illus plantarum,  Lactobacillus fermentum,dan campuran keduanya. Setelah tercampur secara merata, adonan kemudian dicetak dalam casingplastik dan disimpan pada suhu 25oC selama 24 jam. Setelah 24 jam, sosis dikeringkan dengan dehumidifierpada suhu 25°C selama 2 jam. Kemudian sosis difermentasi pada suhu ruang selama 24 jam dan selanjutnya dikukus selama 45 menit. Pengamatan yang dilakukan adalah analisis organoleptik,  kandungan asam laktat, pH, analisis mikrobiologi (ALT, coliform, jumlah bakteri asam laktat, dan E. coli serta nilai gizi (kadar air, kadar abu, kadar lemak, dan kadar protein produk sosis fermentasi. Hasil penelitian menunjukkan bahwa perlakuan penambahan lemak 20% menghasilkan produk sosis ikan tuna fermentasi dengan penampakan dan bau lebih baik, menyebabkan peningkatan kandungan as am laktat dan penurunan pH produk bila dibandingkan dengan penambahan lemak 10%. Penggunaan jenis bakteri yang berbeda tidak berpengaruh pada nilai atribut dan tingkat kesukaan panelis, yaitu panelis menyatakan netral hingga agak suka terhadap produk sosis tuna fermentasi yang dihasilkan. Kandungan asam laktat yang diperoleh adalah 0,28–0,37% sedangkan pH sosis fermentasi yang diperoleh berkisar antara 5,28–6,02. Jumlah total bakteri pada sosis tuna fermentasi adalah log 2,53–3,33, sedangkan jumlah total bakteri asam laktat yang terkandung pada sosis tuna fermentasi adalah log 2,42–2,50. Adapun jumlah coliformrata-rata pada semua perlakuan adalah <3 MPN/g dan E. coli negatif, sedangkan kadar air sosis fermentasi yang dihasilkan adalah 54–58%; kadar

  13. EVALUATION OF TUNA FISHING GROUND IN SOUTHERN COAST OF JAVA - SUMBAWA SEA USING SATELLITE OBSERVED DATA

    Directory of Open Access Journals (Sweden)

    MOKHLAS SATIBI

    2012-11-01

    Full Text Available Potential fishery in territorial water of South Java - Sumbawa Sea has not been exploited maximally. Tuna is one of fisherypotency in the territorial water of South Java - Sumbawa. Tuna is the important economic value because it represent one ofexporting commodity enthused by overseas consumer.Research was conducted in the Southern Java – Sumbawa, Indian Ocean 90 S - 160 S; 1060 E - 1210 E, using fish catch data2003 – 2006. Research location is in the inclusive Region of Fishery Management IX (DKP and PKSPL, 2003. Data weretaken from a daily fish catch of PT. Perikanan Samudra Besar (PSB Benoa Bali 2003 - 2006.Sea level anomaly (SLA data were estimated from Altimetry satellite (Jason 1, wind speed data was from Scatterometersatellite and sea surface temperature (SST data was from Microwave satellite.Based on the result of this research, sea level anomaly of southern coast of Java-Sumbawa was fluctuated according tomonsoon. The highest bigeye tuna fish catched was 40 tuna in June 2003 and the lowest bigeye tuna fish was 2 tuna inNovember 2005. Maximum SLA observe during southeast monsoon was 21.77 cm in august 2005, while minimum SLAobserved during southeast monsoon was -18.15 cm in October 2003. Sea surface temperature of southern coast of Java-Sumbawa also fluctuated according to monsoon. Maximum SST observed during northwest monsoon was 30.450 C in March2006, while minimum SST observed during southeast monsoon was 25.050 C in August 2006. The highest wind speed was10.20 m/sec in June 2004 and the lowest was 2.00 m/sec in October 2004. Wind direction was reversely changed according tomonsoon. Northwest wind monsoon flew eastward and southeast wind monsoon flew westward.Fish production in PT PSB had been done over 4 years since 2003, in northwest and southwest monsoon in constant areaand correlation of linier regression among estimate of fish catching using SLA, SST and wind speed had no correlation. Withfish production during southwest

  14. Oligonucleotide indexing of DNA barcodes: identification of tuna and other scombrid species in food products

    Directory of Open Access Journals (Sweden)

    Botti Sara

    2010-08-01

    Full Text Available Abstract Background DNA barcodes are a global standard for species identification and have countless applications in the medical, forensic and alimentary fields, but few barcoding methods work efficiently in samples in which DNA is degraded, e.g. foods and archival specimens. This limits the choice of target regions harbouring a sufficient number of diagnostic polymorphisms. The method described here uses existing PCR and sequencing methodologies to detect mitochondrial DNA polymorphisms in complex matrices such as foods. The reported application allowed the discrimination among 17 fish species of the Scombridae family with high commercial interest such as mackerels, bonitos and tunas which are often present in processed seafood. The approach can be easily upgraded with the release of new genetic diversity information to increase the range of detected species. Results Cocktail of primers are designed for PCR using publicly available sequences of the target sequence. They are composed of a fixed 5' region and of variable 3' cocktail portions that allow amplification of any member of a group of species of interest. The population of short amplicons is directly sequenced and indexed using primers containing a longer 5' region and the non polymorphic portion of the cocktail portion. A 226 bp region of CytB was selected as target after collection and screening of 148 online sequences; 85 SNPs were found, of which 75 were present in at least two sequences. Primers were also designed for two shorter sub-fragments that could be amplified from highly degraded samples. The test was used on 103 samples of seafood (canned tuna and scomber, tuna salad, tuna sauce and could successfully detect the presence of different or additional species that were not identified on the labelling of canned tuna, tuna salad and sauce samples. Conclusions The described method is largely independent of the degree of degradation of DNA source and can thus be applied to

  15. Mercury levels of yellowfin tuna (Thunnus albacares) are associated with capture location.

    Science.gov (United States)

    Nicklisch, Sascha C T; Bonito, Lindsay T; Sandin, Stuart; Hamdoun, Amro

    2017-10-01

    Mercury is a toxic compound to which humans are exposed by consumption of fish. Current fish consumption advisories focus on minimizing the risk posed by the species that are most likely to have high levels of mercury. Less accounted for is the variation within species, and the potential role of the geographic origin of a fish in determining its mercury level. Here we surveyed the mercury levels in 117 yellowfin tuna caught from 12 different locations worldwide. Our results indicated significant variation in yellowfin tuna methylmercury load, with levels that ranged from 0.03 to 0.82 μg/g wet weight across individual fish. Mean mercury levels were only weakly associated with fish size (R 2  mercury load, and argue for better traceability of fish to improve the accuracy of exposure risk predictions. Copyright © 2017 Elsevier Ltd. All rights reserved.

  16. Banning is not enough: The complexities of oceanic shark management by tuna regional fisheries management organizations

    OpenAIRE

    Tolotti,Mariana Travassos; Filmalter, John David; Bach, Pascal; Travassos, Paulo; Seret, Bernard; Dagorn, Laurent

    2015-01-01

    Recently, declining populations of several pelagic shark species have led to global conservation concerns surrounding this group. As a result, a series of species-specific banning measures have been implemented by Regional Fishery Management Organizations (RFMOs) in charge of tuna fisheries, which include retention bans, finning bans and trading bans. There are both positive and negative aspects to most management measures, but generally, the positive aspects outweigh the negatives, ensuring ...

  17. Improving the safety and quality of raw tuna fillets by x-ray irradiation

    Science.gov (United States)

    In this study, raw tuna fillet (25 g) samples were inoculated by immersing in 0.1% peptone water that contained 108-9 CFU ml-1 of a three-strain mixture of Salmonella enterica for 1 min. The samples were then air dried at 22 oC for 30 min and were packaged separately in sterilized bags prior to X-ra...

  18. Economic Impacts of Climate Change on Tuna Fisheries in Fiji Islands and Kiribati

    Energy Technology Data Exchange (ETDEWEB)

    Aaheim, Asbjoern; Sygna, Linda

    2000-06-01

    This paper discusses the possible economic consequences of a change in the tuna fisheries in the Pacific Ocean resulting from climate change. On the background of Lehodey's (2000) study of potential changes in the tuna fisheries, we survey possible economic impacts in terms of quantities and values and give examples of macroeconomic impacts. The two main effects of climate change on tuna fishing are likely to be a decline in the total stock and a migration of the stock westwards. This will lead to various changes in the catch in different countries. The price of the fish in the export market may also change as a result. The Pacific islands are generally dependent on fisheries, and may therefore be vulnerable to these changes, although some will probably gain while others will lose. Based on a very simple macroeconomic model, it is shown that the resulting effects for the national economy in general may diverge substantially from the expected. This applies, in particular, if the national economies are inflexible and a large part of the population relies on subsistence production, which is the case for many developing countries. (author)

  19. Effects Of Using Fermented Tuna Innards In Fish Feed Formula To Pangasius Pangasius Sp. Growth

    Directory of Open Access Journals (Sweden)

    Alexander KorinusMarantika

    2015-08-01

    Full Text Available The purposes of this research were to determine the best dosage of the tuna innards fermentation powder substitution based on its survival rate specific growth rate and the conversion ratio of pangasius fish Pangasius sp. fish feed. The fish feed test formula contained 30 of raw protein. The tested fish feed consisted of fish powder mixed with substitution powder from fermented tuna innards. The substitution in fish feed A0 B10 C20 and D30. The number of pangasius fish thrown into 50x30x30 cm aquarium was 20 fish with average weight 3.120.03g. Fish feeding frequency was 5 5 three times a day at 0800 1300 and 1900 for 40 days. The results showed that with the added fermented tuna innards protein powder substitution dosage until 20 of the fish feed the survival rate improved reaching 100 the best specific growth rate was at 3.36 BB and the fish feed conversion ratio declined at the lowest 1.55 gg.

  20. Baja visión en la población pediátrica de Las Tunas Low vision of the pediatric population in Las Tunas province

    Directory of Open Access Journals (Sweden)

    Yunia Herbania Labrada Rodríguez

    2006-12-01

    Full Text Available Se presentan los resultados de un estudio descriptivo en 35 pacientes ciegos y débiles visuales matriculados en la Escuela de Ciegos de la provincia Las Tunas. Los pacientes fueron agrupados según categoría visual, sexo, y etiología de baja visión. El sexo masculino fue el más afectado, el mayor número de pacientes eran débiles visuales y las etiologías más frecuentes de baja visión fueron la catarata congénita y la retinopatía de la prematuridadThe results of a descriptive study of 35 blind and impaired vision patients, who study at the School for Blind People in Las Tunas province were presented in this paper. The patients were grouped according to their visual category, sex and etiology of low vision. Males were the most affected, the highest number of patients had impaired vision and the most common causes of low vision were congenital cataract and prematurity retinopathy

  1. 78 FR 52123 - Atlantic Highly Migratory Species; 2006 Consolidated Highly Migratory Species Fishery Management...

    Science.gov (United States)

    2013-08-22

    ... bluefin incidental catch (landings and dead discards) in the pelagic longline fishery, enhance reporting... may submit attachments to electronic comments in Microsoft Word or Excel, WordPerfect, or Adobe PDF... Highly Migratory Species (HMS) Fishery Management Plan (FMP) to control bluefin landings and dead...

  2. 78 FR 66327 - Atlantic Highly Migratory Species (HMS); 2006 Consolidated Highly Migratory Species Fishery...

    Science.gov (United States)

    2013-11-05

    ... anonymous). You may submit attachments to electronic comments in Microsoft Word or Excel, or Adobe PDF file... to implement Amendment 7 to the 2006 Consolidated HMSFMP to control bluefin landings and dead... limit the total catch (landings and dead discards) of bluefin in the Longline category using different...

  3. 78 FR 75327 - Atlantic Highly Migratory Species; 2006 Consolidated Highly Migratory Species Fishery Management...

    Science.gov (United States)

    2013-12-11

    ... Species (HMS) Fishery Management Plan (FMP) to control bluefin incidental catch (landings and dead... may submit attachments to electronic comments in Microsoft Word or Excel, WordPerfect, or Adobe PDF... recommendations of ICCAT. NMFS takes these actions to reduce bluefin dead discards and account for dead discards...

  4. 78 FR 57340 - Atlantic Highly Migratory Species; 2006 Consolidated Highly Migratory Species Fishery Management...

    Science.gov (United States)

    2013-09-18

    ... to reduce bluefin dead discards and account for dead discards in all categories; optimize fishing...). You may submit attachments to electronic comments in Microsoft Word or Excel, WordPerfect, or Adobe... to binding recommendations of ICCAT. NMFS takes these actions to reduce bluefin dead discards and...

  5. 78 FR 78322 - Atlantic Highly Migratory Species; 2006 Consolidated Highly Migratory Species Fishery Management...

    Science.gov (United States)

    2013-12-26

    ... control bluefin incidental catch ] (landings and dead discards) in the pelagic longline fishery, enhance... comments in Microsoft Word or Excel, or Adobe PDF file formats only. FOR FURTHER INFORMATION CONTACT... Consolidated HMSFMP to control bluefin landings and dead discards in the pelagic longline fishery, enhance...

  6. Aplikasi Sistem Informasi Geografis (SIG dan Penginderaan Jauh untuk Pemetaan Daerah Penangkapan Ikan Tuna Mata Besar di Selatan Jawa dan Bali

    Directory of Open Access Journals (Sweden)

    Kadek Bagus Padmaningrat

    2017-02-01

    Full Text Available Bigeye tuna is the dominant species of tuna caught in the territorial waters of the Indian Ocean and a productive tropical species which accounts for more than 10% of the total catch in the whole world. Distribution of bigeye tuna can be predicted through optimum temperature associated with the presence of bigeye tuna and distribution of chlorophyll-a is associated with the presence of small pelagic fish. The distribution of sea surface temperature and chlorophyll-a can be detected through remote sensing systems. The purpose of this study was to determine the relationship between sea surface temperature and chlorophyll-a by the number of bigeye tuna catches in the waters south of Java and Bali, and mapped the area catching bigeye tuna in the waters south of Java and Bali. The method used is a second order polynomial regression analysis to determine the effect of sea surface temperature and chlorophyll-a by the number of bigeye tuna catches as well as correlation analysis to determine the relationship of sea surface temperature and chlorophyll-a by the number of bigeye tuna catches. Sea surface temperature and chlorophyll-a is related to the number of bigeye tuna catches.  The results of the analysis showed a strong relationship between sea surface temperature and chlorophyll-a by the number of bigeye tuna catches. Bigeye tuna fishing grounds in the waters south of Java and Bali are in a position 12oS-15oS and 106°E-118°E.

  7. Utilization of tuna roe and using inulin as oil replacer for producing value added omega-3 mayonnaise product

    Directory of Open Access Journals (Sweden)

    Kanrawee Hunsakul

    2016-03-01

    Full Text Available Background: The fishery industry has been important for Thailand’s economy for more than 30 years. For example, Thailand isthe world’s largest canned tuna producer and exporter. However, onlyordinary meat or white meatis usedfor raw materialin canned tuna products. Whileroe, viscera, head and dark meataresold at cheap prices,with theseby-products being usedto feed plant or local human food,its nutritive values withfat,protein and minerals arestill high. It is well known that tuna is a good source of polyunsaturated fatty acid (PUFA, including Eicosapentaenoicacid (EPA and Docosahexanoic acid (DHA.People around the world pay more attention to eatingsaladsconsisting of fruits and vegetables, in addition todressing. Generally, mayonnaise, a kind of salad dressing, consists of chicken egg yolk(12-15% and soybean oil (30-65%. Both of these ingredients contain very high saturated fatty acid contents. Therefore, because normal mayonnaise is high in fat content and low in polyunsaturated fatty acid, this product is not ideal for people on a diet or those who are trying to control their weight. Objective: To increase omega-3 through tuna roe substitution and to replace fat content using inulin gel. Methods: Tuna roe was prepared by soaking in galangalsolutionextracted with 95% ethanol for removal fishy/rancidity odor. Inulin powder 45 g was suspended in 55 ml of water before being brought to heat at temperature 80oC for 30min to form a gel and stored at 4oC. Treatment ofmakingomega-3 mayonnaise product was started using 100% tuna roe substitution for egg yolk. Thereafter, inulin gel was added to replace vegetable oil at 0, 25, 50, 75 and 100%. Basic mayonnaise containing egg yolk and 0% inulin gel (100% soy bean oil was used asthecontrol sample. Color and emulsion stability testswere monitored for physical quality. pH value, peroxide value (PV and thiobarbituric acid reactive substances (TBARS were used for chemical qualityanalyses. Total viable

  8. [Association of the abundance and vertical distribution of tuna and beakfish in the southeast of the Caribbean sea].

    Science.gov (United States)

    Eslava, Nora; González, Leo W; Gaertner, Daniel

    2003-03-01

    The longline hooks suspension depth was estimated using the Mechanic Imitation of Flexible Systems method. The vertical distribution of tunas and billfish was determined by the relative abundance index, obtained from the catch by 11 to 25 m -long longline vessels, -based at Cumaná, Venezuela, South-eastern Caribbean Sea in depths of 65 to 142 m. The CPUE was evaluated per species, according to depth. High values were found for most of the captured species in the layer from 105 to 125 m. Yellowfin tuna (Thunnus albacares) showed the highest yield (3.37 fish/100 hooks) and blue marlin (Makaira nigricans) the lowest (0.04 fish/100 hooks). However, the statistical comparison did not allow to reject the hypothesis of lack of depth efect (Kruskal-Wallis p > .05), and demonstrated a homogeneous distribution of yellowfin tuna (Thunnus albacares), albacore (Thunnus alalunga), bigeye tuna (Thunnus obesus), sailfish (Istiophorus albicans), white marlin (Tetrapturus albidus) and blue marlin (Makaira nigricans) in the water column. The conclusion is that fish concentration in the Southern border of the Caribbean Sea is possibly due to several hydroclimatic factors--which affect tuna and billfish catching--such as water temperature and dissolved oxygen concentration which limit the distribution according to depth.

  9. Analysis Total Plate Counte (TPC) On Fresh Steak Tuna Applications Edible Coating Caulerpa sp During Stored at Chilling Temperature

    Science.gov (United States)

    Nelce Mailoa, Meigy; Marthina Tapotubun, Alfonsina; Matrutty, Theodora E. A. A.

    2017-10-01

    A study has been conducted to determine the use of Caulerpa sp. Edible coatings on fresh steaks tuna against the presence of microbes during storage at chilling temperatures. In this research, two applied method of edible coating is used, that is dipping and immersion method, with chilling temperature (5°C), storage time (0, 3, 6, 9 days). Each treatment is compared to control (without an edible coating). The results showed that the application of edible coating Caulerpa sp in fresh steaks tuna with soaking and dipping method showed total bacteria increase during storage, but still fulfill the microbiological quality of fresh fish that is maximum total plate 5.0 × 105 cfu/g. Total microbes in fresh steaks tuna were soaked with immersion methods and stored up to 9 days: 2.3 × 105 cfu/g while total microbial on fresh steaks tuna were dipped by dipping method and stored up to 9 days ie 3.4 × 105 cfu/g. So it can be concluded that application method of edible coating Caulerpa sp on fresh steaks tuna soaked better than the method of dipping.

  10. The question of high- or low-temperature glass transition in frozen fish. Construction of the supplemented state diagram for tuna muscle by differential scanning calorimetry.

    Science.gov (United States)

    Orlien, Vibeke; Risbo, Jens; Andersen, Mogens L; Skibsted, Leif H

    2003-01-01

    The thermal behavior of fresh tuna muscle, rehydrated freeze-dried tuna muscle, and tuna sarcoplasmic protein fraction was studied by three types of differential scanning calorimetry (DSC): conventional DSC, alternating DSC, and sensitive micro-DSC. The relationship between glass transition temperature, T(g), and water content was established. Only a low-temperature glass transition was detected for fresh tuna and freeze-dried tuna rehydrated to high water contents, whereas for sarcoplasmic protein fraction both a low-temperature and an apparent high-temperature glass transition were detected for samples of high water content. Construction of the supplemented state diagrams for whole tuna muscle and for tuna sarcoplasmic protein fraction confirmed the low-temperature transition to be glass transition of the maximally freeze-dehydrated phase. The apparent upper transition of sarcoplasmic protein fraction was shown not to be a glass transition but rather to originate from the onset of melting of ice, and the temperature of this event should be denoted T(m)'. The glass transition temperature and the concentration of the maximally freeze dehydrated tuna muscle are -74 degrees C and 79% (w/w), respectively.

  11. The efficacy of x-ray doses on murine norovirus-1 (MNV-1) in pure culture, half-shell oyster, salmon sushi, and tuna salad

    Science.gov (United States)

    n this investigation, we determined the efficacy of X-ray doses on reducing a human norovirus (HuNoV) surrogate [murine norovirus-1 (MNV-1)] in pure culture, half-shell oyster, salmon sushi and tuna salad. The pure culture (phosphate-buffer saline, pH 7.4), half-shell oyster, salmon sushi and tuna s...

  12. The efficacy of X-ray does on murine norovirus-1 (MNV-1) in pure culture, half-shell oyster, salmon sushi, and tuna salad

    Science.gov (United States)

    In this investigation, we determined the efficacy of X-ray doses on reducing a human norovirus (HuNoV) surrogate [murine norovirus-1 (MNV-1)] in pure culture, half-shell oyster, salmon sushi and tuna salad. The pure culture (phosphate-buffer saline, pH 7.4), half-shell oyster, salmon sushi and tuna ...

  13. CATCH AND SIZE OF BULLET AND FRIGATE TUNA CAUGHT BY USING DRIFTING GILLNET IN INDIAN OCEAN OF INDONESIA BASED AT CILACAP FISHING PORT

    Directory of Open Access Journals (Sweden)

    Agustinus Anung Widodo

    2013-12-01

    rate of drifting gillnets on the bullet tuna was also decreased from 0.178 mt/trip in 2006 to 0.013 mt/ trip in 2011. The FL of bullet and frigate tuna ranged respectively between 16-39cm and 25-46cm. Both species were mostly caught by drifting gillnet in adult size condition.

  14. PEMBENTUKAN TUNAS DARI BIJI MANGGIS (Garcinia mangostana L. ASAL BENGKALIS DENGAN PENAMBAHAN BAP DAN MADU SECARA IN VITRO

    Directory of Open Access Journals (Sweden)

    Mayta Novalida Isda

    2016-12-01

    Full Text Available AbstrakGarcinia mangostana L. merupakan salah satu spesies dari famili Guttiferae kaya senyawa dari golongan xanthon. Manggis memiliki juvenil yang lama. Salah satu metode yang dapat memecahkan masalah dalam perbanyakan tanaman manggis dalam jumlah yang banyak, bisa sepanjang musim dan menghasilkan tanaman yang seragam yaitu kultur in vitro. Tujuan dari penelitian ini adalah untuk menentukan konsentrasi terbaik antara Benzil Amino Purin (BAP dan madu terhadap induksi tunas dari eksplan biji manggis yang belah tiga melintang  secara in vitro. Penelitian ini menggunakan Rancangan Acak Lengkap (RAL dengan perlakuan BAP (0;3 mg/L dan madu (3;6 mg/L pada media MS (Murashige-Skoog dengan pengamatan 70 hari setelah tanam (hst. Hasil penelitian menunjukkan bahwa pemberian BAP maupun madu mampu meningkatkan pembentukan tunas. Pemberian BAP dan madu berpengaruh nyata terhadap persentase terbentuknya tunas, waktu muncul tunas, jumlah tunas dan panjang tunas.  Jumlah tunas terbanyak terdapat pada perlakuan 3 mg/L BAP sebanyak 20 tunas per biji. Kombinasi perlakuan dengan penambahan 3 mg/L BAP + 3 ml/L madu menghasilkan persentase terbentuk tunas tertinggi (100%; waktu muncul tunas tercepat 12,75 hst; dan panjang tunas tertinggi 1,86 cm. Pada penelitian ini telah berhasil menginduksi tunas dari biji manggis yang dibelah tiga melintang asal Bengkalis dengan penambahan BAP dan madu.AbstractGarcinia mangostana L. is one of the species within the family Guttiferae that rich in compounds from the class of xanthon. Mangosteen has time juvenile problems. One method that can solve the problem in the mangosteen plant propagation which can be produced in a large number in all season and uniform is in vitro culture. The purpose of this study was to determine the best concentration of BAP and honey to induce the formation of shoot from explants of mangosteen seeds split transversely into three pieces by in vitro method. This study used a Completely Randomized Design

  15. Effect of electron irradiation and bayberry polyphenols on the quality change of yellowfin tuna fillets during refrigerated storage

    Science.gov (United States)

    Bu, Tingting; Jin, Yang; Li, Xiaohui; Zhang, Jinjie; Xu, Dalun; Yang, Wenge; Lou, Qiaoming

    2017-09-01

    This study evaluated the synergistic effect of bayberry polyphenols and electron irradiation in controlling the chemical, microbiological and sensory changes of raw yellowfin tuna fillets at 4 °C for 7 days. The results indicated that the initial values of each index were dose-dependent. The dose of 5 kGy notably accelerated adenosine triphosphate degradation and lipid oxidation, while the doses of 1 and 3 kGy had acceptable sensory quality and yielded a shelf-life of 5 days. The addition of bayberry polyphenols had evident effect in inhibiting freshness breakdown, bacteria growth, histamine formation, and discoloration of tuna fillets. Bayberry polyphenols, as an antioxidant, could inhibit lipid oxidation and sensory side-effects made by irradiation up to 3 kGy. The dose of 1-3 kGy coupled with bayberry polyphenols was optimum to preserve tuna fillets which prolonged the shelf-life to 7 days.

  16. Prediction of Potential Fishing Zones for Skipjack Tuna During the Northwest Monsoon Using Remotely Sensed Satellite Data

    Directory of Open Access Journals (Sweden)

    Mukti Zainuddin

    2017-06-01

    Full Text Available One of economically important fish in the Bay of Bone is Skipjack tuna which their distribution and migration are influenced by surrounding environment.  This study aims to investigate the relationship between skipjack tuna and their environments, and to predict potential fishing zones (PFZs for the fish in the Bone Bay-Flores Sea using satellite-based oceanography and catch data. Generalized additive models (GAMs were used to assess the relationship. A generalized linear model(GLM constructed from GAMs was used for prediction. Monthly mean sea surface temperature (SST and chlorophyll-a during the northwest monsoon (December-January together with catch data were used for the year 2012-2013. We used the GAMs to assess the effect of the environment variables on skipjack tuna CPUE (catch per unit effort. The best GLM was selected to predict skipjack tuna abundance.  Results indicated that the highest CPUEs (fish/trip occurred in areas where SST and chlorophyll-a ranged from 29.5°-31.5°C and 0.15 - 0.25 mg m-3, respectively. The PFZs for skipjack were closely related to the spatial distribution of the optimum oceanographic conditions and these mainly developed in three locations, northern area of Bone Bay in December, in the middle area of the bay (4°-5.5°S and 120.5°-121.5°E during January and moved to the Flores Sea in February. The movement of skipjack concentration was consistent with the fishery data.  This suggests that the dynamics of the optimum oceanographic signatures provided a good indicator for predicting feeding grounds as hotspot areas for skipjack tuna in Bone Bay-Flores Sea during northwest monsoon.   Keywords:  skipjack tuna, potential fishing zones, satellite based-oceanographic data, Northwest monsoon

  17. Arsenic, cadmium and lead in fresh and processed tuna marketed in Galicia (NW Spain): Risk assessment of dietary exposure.

    Science.gov (United States)

    Núñez, Ricardo; García, M Ángeles; Alonso, Julián; Melgar, M Julia

    2018-01-29

    Currently, metal bioaccumulation in fish is increasing and is a cause of concern due to toxicity. Total arsenic, cadmium and lead concentrations in fresh and processed tuna (110 samples) marketed in Galicia (NW Spain) were determined by ICP-MS spectrometry. The average concentrations of As and Cd, 3.78 and 0.024 mg kg -1 w.w., respectively, in fresh tuna were statistically significantly higher than those in processed tuna (p  natural > pickled sauce. Of the two species studied in canned tuna, Thunnus alalunga showed statistically significant higher levels both for As 1.28 mg kg -1 (p < 0.001) and Pb 0.013 mg kg -1 (p = 0.0496) than Thunnus albacares. No samples surpassed the limits set by the EU for Cd and Pb. The limit for As in fish has not been established, but the arsenic contents in fresh tuna reported here are important, as they are among the highest reported in the literature. Considering public health in children and adults with respect to the investigated metals, the estimated daily intakes (EDIs) did not exceed the tolerable intakes. No chronic systemic risk was found since all the target hazard quotients (THQs-TTHQs) were far below 1 (critical value), and the carcinogenic risk (CR) for As did not exceed the acceptable value of 10 -5 . Thus, tuna consumption in the Galician diet does not pose a risk for different population groups in terms of these studied metals/metalloids. Copyright © 2018. Published by Elsevier B.V.

  18. Infection of Anisakids Larvae in Long Tail Tuna (Thunnus tonggol In North Persian Gulf

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    A Eslami

    2011-09-01

    Full Text Available Background: The aim of this paper was to study the prevalence and intensity of Anisakids lar­vae in the long tail tuna fish captured from Iranian shores of Persian Gulf.Methods: Different organs including skin, abdominal cavity, stomach and intestinal contents, stom­ach sub serous tissues, liver, spleen, gonads and 20 grams of muscles of 100 long tail tuna fish (Thannus tonggol caught from waters of the north parts of Persian Gulf were searched for anisakid nematodes larvae. Twenty grams of around the body cavity muscles were digested in artificial gastric juice. Different organs and digested muscles were examined with naked eyes for the presence of anisakids larvae. The collected larvae were preserved in 70% alcohol containing 5% glycerin, and cleared in lactophenol for identification.Results: Our findings revealed that 89% of fish harbored 3rd stage larvae of Anisakis sp. of which 2% were infected with both Anisakis and Raphidascaris. All inspected organs except that of skin were found to be infected, while stomach sub serous tissues were the most infected organ (80% followed by abdominal cavity (10%, liver (4%, testicle (3%, stomach contents and spleen (2% and intestinal contents (1%. Intestine and abdominal cavity were the organs har­bored Raphidascaris sp. Digested muscles were free of parasite. Mean intensity was low for both spe­cies and ranged between 1.5 for Raphidascaris sp. and 3.67 for Anisaki sp.Conclusion: Anisakids larvae especially Anisakis are very prevalent in some fish including tunas of Persian Gulf, and consumption of infected fish if it is not properly cooked may lead to human anisakiasis.

  19. Photobacterium angustum and Photobacterium kishitanii, Psychrotrophic High-Level Histamine-Producing Bacteria Indigenous to Tuna.

    Science.gov (United States)

    Bjornsdottir-Butler, K; McCarthy, S A; Dunlap, P V; Benner, R A

    2016-01-29

    Scombrotoxin fish poisoning (SFP) remains the main contributor of fish poisoning incidents in the United States, despite efforts to control its spread. Psychrotrophic histamine-producing bacteria (HPB) indigenous to scombrotoxin-forming fish may contribute to the incidence of SFP. We examined the gills, skin, and anal vents of yellowfin (n = 3), skipjack (n = 1), and albacore (n = 6) tuna for the presence of indigenous HPB. Thirteen HPB strains were isolated from the anal vent samples from albacore (n = 3) and yellowfin (n = 2) tuna. Four of these isolates were identified as Photobacterium kishitanii and nine isolates as Photobacterium angustum; these isolates produced 560 to 603 and 1,582 to 2,338 ppm histamine in marine broth containing 1% histidine (25°C for 48 h), respectively. The optimum growth temperatures and salt concentrations were 26 to 27°C and 1% salt for P. kishitanii and 30 to 32°C and 2% salt for P. angustum in Luria 70% seawater (LSW-70). The optimum activity of the HDC enzyme was at 15 to 30°C for both species. At 5°C, P. kishitanii and P. angustum had growth rates of 0.1 and 0.2 h(-1), respectively, and the activities of histidine decarboxylase (HDC) enzymes were 71% and 63%, respectively. These results show that indigenous HPB in tuna are capable of growing at elevated and refrigeration temperatures. These findings demonstrate the need to examine the relationships between the rate of histamine production at refrigeration temperatures, seafood shelf life, and regulatory limits. Copyright © 2016, American Society for Microbiology. All Rights Reserved.

  20. The conservation and management of tunas and their relatives: setting life history research priorities.

    Directory of Open Access Journals (Sweden)

    Maria José Juan-Jordá

    Full Text Available Scombrids (tunas, bonitos, Spanish mackerels and mackerels support important fisheries in tropical, subtropical and temperate waters around the world, being one of the most economically- and socially-important marine species globally. Their sustainable exploitation, management and conservation depend on accurate life history information for the development of quantitative fisheries stock assessments, and in the fishery data-poor situations for the identification of vulnerable species. Here, we assemble life history traits (maximum size, growth, longevity, maturity, fecundity, spawning duration and spawning interval for the 51 species of scombrids globally. We identify major biological gaps in knowledge and prioritize life history research needs in scombrids based on their biological gaps in knowledge, the importance of their fisheries and their current conservation status according to the International Union for Conservation of Nature Red List. We find that the growth and reproductive biology of tunas and mackerel species have been more extensively studied than for Spanish mackerels and bonitos, although there are notable exceptions in all groups. We also reveal that reproductive biology of species, particular fecundity, is the least studied biological aspect in scombrids. We identify two priority groups, including 32 species of scombrids, and several populations of principal market tunas, for which life history research should be prioritized following the species-specific life history gaps identified in this study in the coming decades. By highlighting the important gaps in biological knowledge and providing a priority setting for life history research in scombrid species this study provides guidance for management and conservation and serves as a guide for biologists and resource managers interested in the biology, ecology, and management of scombrid species.

  1. Some epidemiological and clinical characteristics of solid malignant tumors in children from Las Tunas

    Directory of Open Access Journals (Sweden)

    Silvio Laffita Estévez

    2015-11-01

    Full Text Available Background: cancer has kept up as the second cause of death in Las Tunas pediatric population.Objective: to characterize clinical and epidemiological variables of the cases diagnosed with solid malignant tumors in children seen and treated in the onco-pediatric consultation of “Mártires de Las Tunas” Pediatric Hospital from 2010 to 2014.Methods: a descriptive and retrospective study was carried out in 62 patients with solid malignant tumors in the pediatric population of Las Tunas province, from January, 2010 to December, 2014. The variables considered were: presumptive diagnosis, age, family history of tumors, clinical signs of alarm related to the tumor at the moment of diagnosis and investigations to confirm the diagnosis.  Results: non-Hodgkin lymphoma was the most frequently diagnosed tumor, with a 19, 35% of the patients. The most affected age group was between 11 and 14 years old, with a 33, 87%. The 16, 13% of the patients had family history of solid malignant tumors. The most frequent form of presentation was the abdominal tumor, with 29, 03 %. Abdominal ultrasound and computerized axial tomography were the most used complementary diagnostic means, both in the 17, 74% of the patients. Biopsy was used to confirm the 96, 77% of the cases.Conclusions: the clinical and epidemiological variables were characterized in pediatric patients diagnosed with solid malignant tumors in Las Tunas. Children between 11 and 14 years old and family history of malignant tumors were the most significant findings.

  2. Anaerobic co-digestion of animal waste: swine manure and tuna fish waste

    Energy Technology Data Exchange (ETDEWEB)

    Otero, L.; Alvarez, J. A.; Lema, J. M.

    2009-07-01

    Anaerobic digestion has become an established and proven technology for the treatment of solid wastes. Co-digestion offers several possible ecological, technology and economical advantages. Anaerobic co-digestion can increase CH{sub 4} production of manure diesters in a 50-200% according to the operation conditions and the co-substrates used. Last September 2007, PROBIOGAS project started up with the objective of improving the production and use of biogas from co-digestion of farming, agricultural and industrial waste. Our research group takes part in the study of co-digestion of swine manure firstly with tuna fish waste and secondly with glycerine (bio diesel production waste). (Author)

  3. Pertinencia del esquema terapéutico antimicrobiano en las infecciones del tracto urinario, Las Tunas

    OpenAIRE

    Maité Rúa del Toro; María del Carmen Méndez Martínez; Ana Maryani Gallardo Pedraza; Aniuska González Pérez; Manuel de Jesús Díaz Pérez

    2015-01-01

    Se realizó un estudio descriptivo de corte transversal, de utilización de medicamentos de tipo indicación-prescripción con elementos de esquema terapéutico, con el objetivo de evaluar la pertinencia del esquema terapéutico de antimicrobianos, para el tratamiento de las infecciones del tracto urinario en la atención primaria de salud en el municipio Las Tunas, en el período comprendido entre enero a diciembre de 2012. El universo estuvo constituido por el total de pacientes con prescripción mé...

  4. Reproductive Biology of Albacore Tuna (Thunnus alalunga) in the Western Indian Ocean

    Science.gov (United States)

    Dhurmeea, Zahirah; Zudaire, Iker; Chassot, Emmanuel; Cedras, Maria; Nikolic, Natacha; Bourjea, Jérôme; West, Wendy; Appadoo, Chandani

    2016-01-01

    The reproductive biology of albacore tuna, Thunnus alalunga, in the western Indian Ocean was examined through analysis of the sex ratio, spawning season, length-at-maturity (L50), spawning frequency and fecundity. From 2013 to 2015, a total of 923 female and 867 male albacore were sampled. A bias in sex ratio was found in favor of females with fork length (LF) Ocean. The reproductive parameters will reduce uncertainty in current stock assessment models which will eventually assist the fishery to be sustainable for future generations. PMID:28002431

  5. OPTIMASI JUMLAH RUMPON, UNIT ARMADA DAN MUSIM PENANGKAPAN PERIKANAN TUNA DI PERAIRAN PRIGI, JAWA TIMUR

    Directory of Open Access Journals (Sweden)

    Erfind Nurdin

    2016-05-01

    Full Text Available Sebagai alat bantu penangkapan ikan, rumpon berfungsi untuk menarik kelompok ikan agar berkumpul di sekitarnya. Dalam jangka pendek rumpon dapat meningkatkan produksi hasil tangkapan, efisiensi dan efektivitas operasi penangkapan ikan. Namun rumpon juga dapat berdampak negatif terhadap keberlajutan stok sumberdaya. Penelitian ini dilakukan di PPN Prigi, Jawa Timur, dengan tujuan untuk mengkaji status pemanfaatan perikanan tuna, optimasi jumlah unit armada dan rumpon serta musim penangkapan ikan.  Beberapa analisis yang digunakan antara lain linear goal programming (LGP, fishing power indeks (FPI, catch per unit of effort (CPUE, maximum sustainable yield (MSY, dan untuk mengetahui pola musim tangkap menggunakan Metode Persentase Rata-rata. Hasil penelitian menunjukkan terdapat indikasi pemanfaatan perikanan tuna yang berlebih pada tingkat pengupayaan yang melampaui batas maksimum (MSY = 2334,9 ton/tahun.  Jumlah optimum untuk armada jaring insang sebanyak 43 unit, pancing tonda 63 unit dan rumpon 33 unit pada luasan area penelitian 8.940 km². Musim tangkap berlangsung pada Bulan Juni sampai Desember dengan puncak musim di bulan Juli.    Fish Aggregating Device (FADs has a function to attract and aggregate fish schooling. In short term, the advantage of FADs used is to increase the efficiency and effectiveness of fishing operations and the fish caught by the fishers; however FADs might also result a negative impact on the sustainability of fish stock.This study was conducted in fishing area of Prigi National Fishing Port, East Java. The objective of this study is to investigate the tuna fisheries status, optimization number of fishing units and number of FADs. Some analysis methods applied in this study were linear goal programming (LGP, fishing power index (FPI, catch per unit of effort (CPUE, maximum sustainable yield (MSY, and analysis of fishing season using the Average Percentage Methods. The results showed that the tuna fisheries in

  6. Mitochondrial DNA analysis reveals three stocks of yellowfin tuna Thunnus albacares (Bonnaterre, 1788) in Indian waters

    Digital Repository Service at National Institute of Oceanography (India)

    Kunal, S.P.; GirishKumar; Menezes, M.R.; Meena, R.M.

    subcontinent during south-west monsoon periods leading to high primary and secondary productivity 11 (Wyrtki 1973; Qasim 1982). This high primary productivity is responsible for large schools of baitfish upon which tuna species including YFT feed. YFT.... In Indian Ocean, spawning occurs mainly from December to March in the equatorial area (0- 10°S) with the main spawning grounds west of 75°E (IOTC 2006). Secondary spawning grounds exist off India, in the Mozambique Channel and in the eastern Indian Ocean...

  7. Atlantic Salmon Telemetry Monitoring

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Annual telemetry data are collected as part of specific projects (assessments within watersheds) or as opportunistic efforts to characterize Atlantic salmon smolt...

  8. GARP Atlantic Tropical Experiment

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The GARP Atlantic Tropical Experiment (GATE) was the first major international experiment of the Global Atmospheric Research Program (GARP). It was conducted over...

  9. Microbiological stability of canned tuna produced in Italy and in non-European countries

    Directory of Open Access Journals (Sweden)

    Francesco Casalinuovo

    2015-03-01

    Full Text Available The results of a study on the microbiological stability of canned tuna produced by Italian companies and similar canned products manufactured in countries outside Europe are reported herein. The study involved 38 samples of canned tuna of various brands, of which 14 were produced by companies outside Europe and 24 by Italian companies. Qualitative and quantitative microbiological tests were conducted for the following parameters: bacterial colony counts at 30°C, total coliforms, total Enterobacteriaceae, sulphite-reducing anaerobes, Salmonella spp., Bacillus cereus, Escherichia coli, Staphylococcus aureus, yeasts and molds. Bacterial loads and mold contamination were respectivelyin found in 8/14 (57% samples from outside EU and 7/24 (29% Italian samples. The bacterial flora was represented by Gram-positive bacteria (Staphylococcus warneri, Staphylococcus lentus, Streptococcus mitis, Enterococcus faecalis, Leuconostoc mesenteroides, Gram-negative bacteria (Sphingomonas paucimobilis, Acinetobacter iwoffii, Rhizobium radiobacter, spore-forming bacteria (Bacillus vallismortis, while the fungal species was represented by Penicillium spp., Rhizopus spp., Rhodotorula spp. and Alternaria spp. Excluding anomalies in the thermal treatment process of products and any contamination after treatment, the contaminations encountered in both cases were most likely due to insufficient production quality standards and the quality of the raw material used. These results may require a redefinition of the concept of commercial stability as hitherto stated.

  10. Accumulation of Mercury, Cadmium, Tin, Nickel, iron and Zinc in canned tuna from Khuzestan Province

    Directory of Open Access Journals (Sweden)

    M Velayatzadeh

    2014-11-01

    Full Text Available Toxicity of heavy metals has led to numerous studies on the accumulation of these elements in fish and fishery products such as canned products. The objective of the present study was to determine the concentrations of Hg, Cd, Sn, Zn, Ni, Fe in canned tuna fish from of Khuzestan Provinces. A total number of 54 tuna fish cans from three brands (A, B and C was collected from Ahvaz retails. The samples were subjected to dry digestion and the concentrations of the heavy metals were measured using Atomic Absorption Spectrophotometer Perkin Elmer 4100. In this study, no significant difference was observed between the concentrations of heavy metals in three various samples (P>0.05. The mean concentrations of Hg, Cd, Ni Sn, Zn and Fe in group C samples were determined at 0.048±0.007, 0.297±0.053, 0.171±0.031, 0.062±0.012, 5.36±0.82, 7.63±0.04 mg/Kg. Moreover, the highest level of Cd, Ni and Fe concentrations was observed in group C samples. In comparison with WHO, FAO and FDA standards, concentration of Ni, Sn, Hg and Zn was found lower. Meanwhile, the concentration of Cd was estimated higher than WHO, NHMRC and UKMAFF limits.

  11. Determination of histamine and identification of histamine-producing bacteria in frozen Longtail tuna (Thunnus tonggol

    Directory of Open Access Journals (Sweden)

    V Koohdar

    2012-05-01

    Full Text Available Fish is considered as highly perishable food which spoils soon after death if not preserved properly. Consumption of spoiled fish results in the outbreaks of food poisoning such as histamine poisoning. Biogenic amines are the causative agents of histamine poisoning which are produced by various bacterial species. The aim of this study was to determine the amount of histamine and to identify the histamine-producing bacteria onfrozen Longtail tuna (Thunnus tonggol hunted from south of Iran. Microbial examinations and measurement of histamine were performed on the muscles around the gills of twenty five frozen samples. The results indicated that the mean ± SE Log CFU/g for total microbial and psychotrophic counts were 4.81 ± 0.26 and 4.66 ± 0.25, respectively. Different bacterial isolates were identified as histamine-producing bacteria i.e., Clostridium perfringens (24.4% followed by Proteus spp. (23.0%, Klebsiella spp. (13.9%, and Enterobacter spp. (11.1%. Histamine content in 65.0% of the samples was more than the maximum acceptable level of 50 ppm. Therefore, there is a seafood safety risk in the current harvesting and post harvesting methods used in Longtail tuna industry.

  12. Optimisation of the microencapsulation of tuna oil in gelatin-sodium hexametaphosphate using complex coacervation.

    Science.gov (United States)

    Wang, Bo; Adhikari, Benu; Barrow, Colin J

    2014-09-01

    The microencapsulation of tuna oil in gelatin-sodium hexametaphosphate (SHMP) using complex coacervation was optimised for the stabilisation of omega-3 oils, for use as a functional food ingredient. Firstly, oil stability was optimised by comparing the accelerated stability of tuna oil in the presence of various commercial antioxidants, using a Rancimat™. Then zeta-potential (mV), turbidity and coacervate yield (%) were measured and optimised for complex coacervation. The highest yield of complex coacervate was obtained at pH 4.7 and at a gelatin to SHMP ratio of 15:1. Multi-core microcapsules were formed when the mixed microencapsulation system was cooled to 5 °C at a rate of 12 °C/h. Crosslinking with transglutaminase followed by freeze drying resulted in a dried powder with an encapsulation efficiency of 99.82% and a payload of 52.56%. Some 98.56% of the oil was successfully microencapsulated and accelerated stability using a Rancimat™ showed stability more than double that of non-encapsulated oil. Copyright © 2014 Elsevier Ltd. All rights reserved.

  13. IMPACT OF CLIMATE ANOMALY ON CATCH COMPOSITION OF NERITIC TUNA IN SUNDA STRAIT

    Directory of Open Access Journals (Sweden)

    Khairul Amri

    2013-12-01

    Full Text Available Tongkol komo/kawakawa (Euthynnus affinis and tenggiri (Scomberomerus guttatus are commonly caught by mini purseiners operated in Sunda Straits and landed in Labuan, West Java. This species inhabits coastal water and has preference staying in relatively warm water. Oceanography parameters commonly influencing the distribution of Euthynnus affinis are temperature, current, and salinity. The oceanography of Sunda Strait is influenced by water masses coming from the north that mainly originated from the Java Sea and water masses from the south mainly originated from Indian Ocean. The internal oceanography of Sunda Strait is also influenced by upwelling and monsoon as regional climate anomaly (ENSO and Indian Ocean Dipole Mode. This paper describes the influence of Dipole Mode (positive and negative event and ENSO (El- Nino/La-Nina to the catch dynamics of neritic tuna particularly in Sunda Straits waters. The results shown that regional climate anomaly influenced neritic tuna catch and its composition. The catches Euthynnus affinis in phase negative dipole mode or La-Nina were higher and dominated the catch composition of pelagic fishes of Sunda Strait. Similar situation also is showen by Scomberomorus commerson.

  14. Substitutions in the Glycogenin-1 Gene Are Associated with the Evolution of Endothermy in Sharks and Tunas.

    Science.gov (United States)

    Ciezarek, Adam G; Dunning, Luke T; Jones, Catherine S; Noble, Leslie R; Humble, Emily; Stefanni, Sergio S; Savolainen, Vincent

    2016-10-05

    Despite 400-450 million years of independent evolution, a strong phenotypic convergence has occurred between two groups of fish: tunas and lamnid sharks. This convergence is characterized by centralization of red muscle, a distinctive swimming style (stiffened body powered through tail movements) and elevated body temperature (endothermy). Furthermore, both groups demonstrate elevated white muscle metabolic capacities. All these traits are unusual in fish and more likely evolved to support their fast-swimming, pelagic, predatory behavior. Here, we tested the hypothesis that their convergent evolution was driven by selection on a set of metabolic genes. We sequenced white muscle transcriptomes of six tuna, one mackerel, and three shark species, and supplemented this data set with previously published RNA-seq data. Using 26 species in total (including 7,032 tuna genes plus 1,719 shark genes), we constructed phylogenetic trees and carried out maximum-likelihood analyses of gene selection. We inferred several genes relating to metabolism to be under selection. We also found that the same one gene, glycogenin-1, evolved under positive selection independently in tunas and lamnid sharks, providing evidence of convergent selective pressures at gene level possibly underlying shared physiology. © The Author(s) 2016. Published by Oxford University Press on behalf of the Society for Molecular Biology and Evolution.

  15. Strategies and tactics of tuna fishers in the payao (anchored FAD) fishery from general Santos city, Philippines

    NARCIS (Netherlands)

    Macusi, Edison; Babaran, R.P.; Zwieten, van P.A.M.

    2015-01-01

    Payaos or anchored FADs are used extensively in the Philippine tuna fishery. Currently, spatial regulations on FAD use are implemented with limited observance or understanding of their potential impacts. A combination of semi-structured interviews (n=150) and a total of six focus group discussions

  16. Vertical Movements, Behavior and Habitat Utilization of Adult Yellowfin Tuna (Thunnus albacares) Tagged in West Philippine Sea, Mindoro Island, Philippines

    NARCIS (Netherlands)

    Macusi, Edison; Babaran, R.P.; Ingles, J.T.

    2015-01-01

    This paper describes the vertical movements, behavior and habitat utilization of an electronically tagged adult yellowfin tuna (Thunnus albacares) after 17 days of liberty in the Philippines based on analyses of 23,845 datapoints recorded from a recovered electronic popup tag. The exhaustive set

  17. 78 FR 40997 - Enhanced Document Requirements To Support Use of the Dolphin Safe Label on Tuna Products

    Science.gov (United States)

    2013-07-09

    ... Requirements To Support Use of the Dolphin Safe Label on Tuna Products AGENCY: National Marine Fisheries.... SUMMARY: NMFS issues this final rule to revise regulations under the Dolphin Protection Consumer... represent the product as dolphin-safe. This rule modifies the requirements for the certifications that must...

  18. 78 FR 20604 - Enhanced Document Requirements To Support Use of the Dolphin Safe Label on Tuna Products

    Science.gov (United States)

    2013-04-05

    ... Requirements To Support Use of the Dolphin Safe Label on Tuna Products AGENCY: National Marine Fisheries...; request for comments. SUMMARY: NMFS proposes to revise regulations under the Dolphin Protection Consumer... represent the product as dolphin-safe. This proposed rule would modify the requirements for the...

  19. Total mercury in fresh and processed tuna marketed in Galicia (NW Spain) in relation to dietary exposure.

    Science.gov (United States)

    García, M Ángeles; Núñez, Ricardo; Alonso, Julián; Melgar, M Julia

    2016-12-01

    Mercury is a toxic trace metal, which can accumulate to levels threatening human and environmental health. In this study, contents of total mercury have been determined by ICP-MS spectrometry in fresh and processed tuna (110 samples) purchased from supermarkets in NW Spain. Mercury was present in all samples analyzed; however, only one sample of fresh tuna (1.070 mg kg-1 wet weight (w.w.)) slightly exceeded the limit of the EU (1.0 mg kg-1 w.w.). The average mercury concentration in processed tuna was lower than fresh, 0.306 mg kg-1 w.w., and ranged from 0.080 to 0.715 mg kg-1 w.w. Results were compared with literature data. In regard to the three types of preparation-packaging media for canned tuna, total Hg content was found in the following order: olive oil > natural > pickled sauce; the last showed significant statistical differences (p exposure to Hg.

  20. Report of species diagnosis of a tuna at Queens Products B.V. on 23 December 2009

    NARCIS (Netherlands)

    Couperus, A.S.

    2009-01-01

    According to a company in the same marketsegment as Queen Products B.V. part of the tuna filet sold by Queens Products B.V. does not consist of the species that is mentioned on the label. According to DNA analysis filets were not from the species on the label, Albacore (Thunnus alalunga), but from

  1. Sea level height, sea surface temperature, and tuna yields in the Panama bight during El Niño

    Directory of Open Access Journals (Sweden)

    M. J. Pedraza

    2006-01-01

    Full Text Available Between 1988 and 1998, annual tuna landings at Buenaventura (Colombian Pacific are correlated with the sea surface temperature in the central Equatorial Pacific (r=0.78, p<0.05 and the sea level height at Buenaventura (r=0.76, p<0.05 and Balboa (Panama (r=0.79, p<0.05. Seasonal oceanic upwelling is forced by the Panama wind jet, which may favour oceanic fisheries such as tuna. Here we first apply a bivariate correlation method (Pyper and Peterman, 1994 and then a multivariate approach (principal components analysis or PCA to investigate the relationships of these environmental variables with landings. With the first method, we find that landing is best correlated with the sea surface temperature in the Niño 3 region, whereas the other relationships are less clear. In contrast, with PCA we find that PC1 explains 90.6% of the total variance and suggests that sea surface temperature plays a major role in determining tuna availability in the area (especially during El Niño events. Since PC2 is mainly correlated with sea level height at Balboa but only represents 6.8% of the total variance, we suggest that oceanic upwelling effects on tuna landings at Buenaventura are not significant at interannual scales.

  2. Blood Volume, Plasma Volume and Circulation Time in a High-Energy-Demand Teleost, the Yellowfin Tuna (Thunnus Albacares)

    DEFF Research Database (Denmark)

    Brill, R.W.; Cousins, K.L.; Jones, D.R.

    1998-01-01

    We measured red cell space with 51Cr-labeled red blood cells, and dextran space with 500 kDa fluorescein-isothiocyanate-labeled dextran (FITC-dextran), in two groups of yellowfin tuna (Thunnus albacares). Red cell space was 13.8+/-0.7 ml kg-1 (mean +/- s.e.m.) Assuming a whole- body hematocrit...... that the volume of the secondary circulatory system of yellowfin tuna is small, and its exact volume is not measurable by our methods. Although blood volume is not exceptional, circulation time (blood volume/cardiac output) is clearly shorter in yellowfin tuna than in other active teleosts. In a 1 kg yellowfin...... tuna, circulation time is approximately 0.4 min (47 ml kg-1/115 ml min-1 kg- 1) compared with 1.3 min (46 ml kg-1/35 ml min-1 kg-1) in yellowtail (Seriola quinqueradiata) and 1.9 min (35 ml kg-1/18 ml min-1 kg-1) in rainbow trout (Oncorhynchus mykiss). In air-breathing vertebrates, high metabolic rates...

  3. Certification of total arsenic, dimethylarsinic acid and arsenobetaine contents in a tuna fish powder (BCR-CRM 627)

    DEFF Research Database (Denmark)

    Lagarde, F.; Amran, M. B.; Leroy, M. J. F.

    1999-01-01

    Tuna fishes were collected in the Straits of Messina (Italy), were dissected and dorsal muscles minced, freeze-dried, ground and sieved. The obtained powder was stabilised by gamma-irradiation and filled into brown glass bottles. The homogeneity and stability at +20 degrees C and +40 degrees C were...

  4. Field biology of Halimeda tuna (Bryopsidales, Chlorophyta) across a depth gradient : comparative growth, survivorship, recruitment, and reproduction

    NARCIS (Netherlands)

    Vroom, P.S.; Smith, C.M.; Coyer, J.A.; Walters, L.; Hunter, C.L.; Beach, K.S.; Smith, J.E.

    Growth, survivorship, recruitment, and reproduction of Halimeda tuna, a dominant green alga in many reef systems of the Florida Keys, were monitored at a shallow back reef ( 4 - 7m) and deep reef slope ( 15 - 22 m) on Conch Reef. Despite lower light intensities and similar grazing pressures,

  5. Much More than Music: The Cultural Importance of "Estudiantinas-Tunas" and Choirs as Informal Adult Music Schools and Communitas

    Science.gov (United States)

    Gómez-Ullate, Martín; Belmonte Trujillo, José Carlos

    2016-01-01

    For each person studying music in formal institutions in Spain, there are at least five others learning and performing in "informal" schools and settings. Choirs and "estudiantinas" or "tunas" are two examples of these informal schools found both in Ibero-America and worldwide. Their place in society and their…

  6. Trophic niches of sympatric tropical tuna in the Western Indian Ocean inferred by stable isotopes and neutral fatty acids

    Science.gov (United States)

    Sardenne, Fany; Bodin, Nathalie; Chassot, Emmanuel; Amiel, Aurélien; Fouché, Edwin; Degroote, Maxime; Hollanda, Stéphanie; Pethybridge, Heidi; Lebreton, Benoit; Guillou, Gaël; Ménard, Frédéric

    2016-08-01

    This study examined the trophic ecology of three sympatric tropical tuna species (bigeye BET, skipjack SKJ, and yellowfin YFT) sampled in the Western Indian Ocean throughout 2013. Specifically we explored inter-specific resource partitioning and ontogenetic variability using neutral fatty acids and stable isotope analysis of liver and muscle from small (⩽100 cm fork length, FL) and large (>100 cm FL) tuna collected in mixed schools at the surface by purse-seine. Both biochemical tracers were used to calculate trophic niche indices that collectively revealed high potential for resource overlap, especially among small tuna. Resource overlap appeared strongest between BET and YFT, with SKJ tissues having high carbon isotope (δ13C) values (-17 ± 0.3‰), lower nitrogen isotope (δ15N) values (11.4 ± 0.6‰), and higher relative proportion of poly-unsaturated fatty acids (PUFA) than the two other species, indicating a different diet. Size was found to be a strong predictor for most biochemical tracers in the three species with δ13C, δ15N and total lipid content in the liver. In the larger species (YFT and BET), proportions of mono-unsaturated fatty acids typically increased with size, while quantities of PUFA decreased. In addition to ontogenetic variability, trophic markers were shown to vary between sampling area and season: higher lipid reserves and δ15N values, and lower δ13C values occurred during monsoon periods around Seychelles than in the Mozambique Channel (parted from about 1500 km). Our multi-tracer approach reveals the magnitude of potential competitive interactions in mixed tropical tuna schools at both small and large sizes and demonstrates that ontogenetic niche differentiation acts as a major factor of coexistence in tropical tuna.

  7. Defining the Habitat of Pacific Tuna of the Eastern Tropical Pacific from Satellite Imagery, Climatologies, and a Global Circulation Model

    Science.gov (United States)

    Kiefer, D. A.; Hinton, M. G.; Armstrong, E. M.; Harrison, D. P.; Menemenlis, D.; Hu, C.

    2016-02-01

    With support from NASA's Ecological Forecasting program, we have developed a Tuna Stock Assessment Support System, which merges time series of satellite imagery, a global ocean circulation model, climatology from field surveys, and fisheries data on catch and effort. The purpose of this software is to extract information on the habitat of skipjack, bigeye, and yellowfin tuna in the Eastern Tropical Pacific. The support system is based upon a 50-year record of catch and effort from long-line and purse seine vessels provide by the Inter-American Tropical Tuna Commission. This database, which covers thousands of kilometers of ocean surface, provides monthly information at a 1 degree spatial resolution for the purse seine fleet and 5 degree resolution for the long line fishery. This data is then merged in time and space with satellite imagery of sea surface temperature, chlorophyll, and height, as well as NODC climatologies of oxygen concentration and temperature, and output from NASA's ECCO-2 global circulation model, which provides 3-dimensional simulations of water density, current velocity, mixed layer depth, and sea surface height. Our analyses have yielded a broad range of understanding of the habitat and dynamics both the fish and the fisherman. The purse seine ground, which targets younger tuna, is constrained to waters where the hypoxic layer is shallow. The longline fishery, which targets older tuna, is not constrained by the hypoxic layer and has a much larger distribution. We have characterized the preferences of each species to environmental variables including the depth of the hypoxic layer, the depth of the water column, as well as sea surface height, temperature, and chlorophyll concentration. Finally, the analyses have revealed information on local depletion by fishing, the size distribution of the schools of younger fish, and the impact of ENSO on fishing activities.

  8. A continuous time delay-difference type model (CTDDM) applied to stock assessment of the southern Atlantic albacore Thunnus alalunga

    Science.gov (United States)

    Liao, Baochao; Liu, Qun; Zhang, Kui; Baset, Abdul; Memon, Aamir Mahmood; Memon, Khadim Hussain; Han, Yanan

    2016-09-01

    A continuous time delay-diff erence model (CTDDM) has been established that considers continuous time delays of biological processes. The southern Atlantic albacore ( Thunnus alalunga) stock is the one of the commercially important tuna population in the marine world. The age structured production model (ASPM) and the surplus production model (SPM) have already been used to assess the albacore stock. However, the ASPM requires detailed biological information and the SPM lacks the biological realism. In this study, we focus on applying a CTDDM to the southern Atlantic albacore ( T. alalunga) species, which provides an alternative method to assess this fishery. It is the first time that CTDDM has been provided for assessing the Atlantic albacore ( T. alalunga) fishery. CTDDM obtained the 80% confidence interval of MSY (maximum sustainable yield) of (21 510 t, 23 118t). The catch in 2011 (24 100 t) is higher than the MSY values and the relative fishing mortality ratio ( F 2011/ F MSY) is higher than 1.0. The results of CTDDM were analyzed to verify the proposed methodology and provide reference information for the sustainable management of the southern Atlantic albacore stock. The CTDDM treats the recruitment, the growth, and the mortality rates as all varying continuously over time and fills gaps between ASPM and SPM in this stock assessment.

  9. Atlantic menhaden adult tagging study

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Atlantic menhaden are a schooling forage fish species, which are subject to a large commercial purse seine fishery. Atlantic menhaden are harvested for reduction...

  10. Form and function of the bulbus arteriosus in yellowfin tuna (Thunnus albacares), bigeye tuna (Thunnus obesus) and blue marlin (Makaira nigricans): static properties.

    Science.gov (United States)

    Braun, Marvin H; Brill, Richard W; Gosline, John M; Jones, David R

    2003-10-01

    The juxtaposition of heart and gills in teleost fish means that the Windkessel function characteristic of the whole mammalian arterial tree has to be subserved by the extremely short ventral aorta and bulbus arteriosus. Over the functional pressure range, arteries from blue marlin (Makaira nigricans) and yellowfin tuna (Thunnus albacares) have J-shaped pressure-volume (P-V) loops, while bulbi from the same species have r-shaped P-V loops, with a steep initial rise followed by a compliant plateau phase. The steep initial rise in pressure is due to the geometry of the lumen. The interactions between radius, pressure and tension require a large initial pressure to open the bulbar lumen for flow. The plateau is due to the unique organization of the bulbar wall. The large elastin:collagen ratio, limited amount of collagen arranged circumferentially, lack of elastin lamellae and low hydrophobicity of the elastin itself all combine to lower stiffness, increase extensibility and allow efficient recoil. Even though the modulus of bulbus material is much lower than that of an artery, at large volumes the overall stiffness of the bulbus increases rapidly. The morphological features that give rise to the special inflation characteristics of the bulbus help to extend flow and maintain pressure during diastole.

  11. Significant histamine formation in tuna (Thunnus albacares) at 2 degrees C--effect of vacuum- and modified atmosphere-packaging on psychrotolerant bacteria.

    Science.gov (United States)

    Emborg, Jette; Laursen, Birgit Groth; Dalgaard, Paw

    2005-06-15

    Occurrence and importance of psychrotolerant histamine producing bacteria in chilled fresh tuna were demonstrated in the present study. The objective was to evaluate microbial formation of histamine and biogenic amines in chilled fresh tuna from the Indian Ocean and stored either vacuum-packed (VP) or modified atmosphere-packed (MAP). Firstly, biogenic amines and the dominating microbiota were determined in VP tuna involved in an outbreak of histamine fish poisoning in Denmark. Secondly, the microbiota of fresh MAP tuna was evaluated at the time of processing in Sri Lanka and chemical, microbial and sensory changes were evaluated during storage at 1-3 degrees C. To explain the results obtained with naturally contaminated tuna the effect of VP and MAP on biogenic amine formation by psychrotolerant bacteria was evaluated in challenge tests at 2 degrees C and 10 degrees C. The VP tuna that caused histamine fish poisoning had a histamine concentration of >7000 mg/kg and this high concentration was most likely produced by psychrotolerant Morganella morganii-like bacteria or by Photobacterium phosphoreum. Similar psychrotolerant M. morganii-like bacteria dominated the spoilage microbiota of fresh MAP tuna with 60% CO2/40% N2 and formed >5000 mg/kg of histamine after 24 days at 1.7 degrees C. These psychrotolerant bacteria were biochemically similar to M. morganii subsp. morganii and their 16S rDNA (1495 bp) showed >98% sequence similarity to the type strain of this species. Toxic concentrations of histamine were produced at 2.1 degrees C in inoculated VP tuna by both the psychrotolerant M. morganii-like bacteria (7400+/-1050 mg/kg) and P. phosphoreum (4250+/-2050 mg/kg). Interestingly, MAP with 40% CO2/60% O2, in challenge tests, had a strong inhibitory effect on growth and histamine formation by both the psychrotolerant M. morganii-like bacteria and P. phosphoreum. In agreement with this, no formation of histamine was found in naturally contaminated fresh MAP tuna with

  12. 75 FR 11129 - Mid-Atlantic Fishery Management Council; Atlantic Mackerel, Butterfish, Atlantic Bluefish, Spiny...

    Science.gov (United States)

    2010-03-10

    ... ; Mail or hand deliver to Daniel T. Furlong, Executive Director, Mid-Atlantic Fishery Management Council... Council by telephone (302) 674-2331. FOR FURTHER INFORMATION CONTACT: Mr. Daniel T. Furlong, Mid-Atlantic...

  13. Enzymatic Hydrolysis of Yellowfin Tuna (Thunnus albacares By-Products Using Protamex Protease

    Directory of Open Access Journals (Sweden)

    Huong Thi My Nguyen

    2011-01-01

    Full Text Available Long-term proteolysis of tuna by-products (head, viscera and tail by the wide spectrum protease Protamex has been investigated and compared. After hydrolysis, two fractions (soluble aqueous phase and insoluble sludge were collected. Chemical compositions of each fraction and molecular mass distributions of soluble peptides were determined. Degrees of hydrolysis obtained after 12 h of hydrolysis of head, viscera and tail were 32.3, 16.8 and 22.2 %, respectively. Nitrogen recovery in the soluble fractions was 73.6 % for the head, 82.7 % for the viscera and 85.8 % for the tail. Lipid distribution indicated that the majority of lipids remained in the sludge. Such proteolysis appears useful for the production of very different fractions: one rich in peptides of medium to small molecular mass and poor in lipids, and another one containing the insoluble proteins and the majority of lipids.

  14. Breve historia de los servicios farmacéuticos en Las Tunas

    Directory of Open Access Journals (Sweden)

    Yoandry Martínez Guevara

    2014-08-01

    Full Text Available En el presente trabajo se realiza un acercamiento a la historia de los servicios farmacéuticos en Las Tunas, con el objetivo de analizar el surgimiento y formación de estos servicios y su relación con la sociedad. La investigación recorre casi 400 años de historia, abarcando desde los inicios del boticario y farmacéutico, el tránsito a profesión, y por último, su especialización e impacto en la sociedad tunera de los siglos XIX y XX; profundizando en el periodo de la República Neocolonial. Se aporta el número de boticas y farmacias que existieron en el territorio. La revisión realizada actualiza informaciones sobre la historia regional, a partir de la consulta de fuentes especializadas y complementa investigaciones en curso sobre este tema

  15. RAD-seq derived genome-wide nuclear markers resolve the phylogeny of tunas

    KAUST Repository

    Díaz-Arce, Natalia

    2016-06-07

    Although species from the genus Thunnus include some of the most commercially important and most severely overexploited fishes, the phylogeny of this genus is still unresolved, hampering evolutionary and traceability studies that could help improve conservation and management strategies for these species. Previous attempts based on mitochondrial and nuclear markers were unsuccessful in inferring a congruent and reliable phylogeny, probably due to mitochondrial introgression events and lack of enough phylogenetically informative markers. Here we infer the first genome-wide nuclear marker-based phylogeny of tunas using restriction site associated DNA sequencing (RAD-seq) data. Our results, derived from phylogenomic inferences obtained from 128 nucleotide matrices constructed using alternative data assembly procedures, support a single Thunnus evolutionary history that challenges previous assumptions based on morphological and molecular data.

  16. Incidencia de los defectos congénitos asociados al uso de medicamentos en Las Tunas

    Directory of Open Access Journals (Sweden)

    Glenys K. Silva Gonzalez

    2015-04-01

    Full Text Available La Red de Genética Nacional estableció un sistema de vigilancia pre y postnatal, para evaluar los efectos potenciales de la medicación en aquellas gestantes que ocasionalmente o de manera permanente ingieren fármacos durante el embarazo. En la provincia de Las Tunas se realizó un estudio descriptivo, prospectivo para describir la incidencia de defectos congénitos en la etapa prenatal y al nacimiento de los fetos en las mujeres que consumieron algún medicamento en el primer trimestre del embarazo, durante el período de enero de 2009 a mayo de 2014. La población de estudio lo constituyeron las 627 embarazadas, que habían consumido algún tipo de fármaco que se identificara como posible agente teratogénico y fueron remitidas al Centro de Genética Provincial para su seguimiento. Los datos obtenidos del registro de morbilidad teratogénica permitieron analizar las variables: casos reportados al registro provincial de medicamentos durante la gestación, medicamentos consumidos durante el embarazo según categoría, momento de la gestación en que se produjo el consumo del fármaco, duración del tratamiento durante el embarazo y evaluación del embarazo o el producto. El consumo de medicamentos fue más abundante en gestantes del municipio Las Tunas. Predominó el consumo de medicamentos antiinfecciosos; el consumo ocurrió con más frecuencia en el primer trimestre; y la duración más probable fue de una semana. A pesar de ello, el consumo de medicamentos durante la gestación no significó un riesgo incrementado de teratogenicidad

  17. Incidencia prenatal de los defectos congénitos en Las Tunas

    Directory of Open Access Journals (Sweden)

    Juana Lupe Muñoz Callol

    2015-04-01

    Full Text Available Los defectos congénitos son la principal causa de morbilidad y mortalidad neonatal en casi todo el mundo. La introducción del diagnóstico prenatal y el establecimiento de estrategias preventivas en la atención primaria de salud han logrado la disminución de la prevalencia al nacimiento de defectos congénitos y de la mortalidad infantil en nuestro país. Se realizó un estudio descriptivo de corte transversal de los casos diagnosticados o confirmados prenatalmente en la consulta de genética provincial, con el objetivo de describir la incidencia prenatal de los defectos congénitos en la provincia Las Tunas, durante el período de enero 2013 a mayo 2014. De un universo de 9462 embarazadas de la provincia, en el periodo de estudio; se escogió una muestra de 110 gestantes que presentaron defectos fetales en diferentes órganos y sistemas. La información se obtuvo del registro provincial, donde se analizaron las variables: comportamiento de defectos congénitos por áreas de salud, edad de las madres por defectos congénitos, defectos congénitos por programas prenatales y los defectos congénitos por sistemas. El mayor número de casos se diagnosticó en el segundo trimestre del embarazo, siendo el sistema cardiovascular donde se encontró un número mayor de defectos congénitos, seguido del sistema digestivo, genitourinarias y del sistema nervioso central. Las edades maternas estuvieron comprendidas entre 21 y 30 años, siendo el municipio Tunas el que aportó un número significativo de afectados

  18. 78 FR 59878 - Atlantic Highly Migratory Species; Commercial Atlantic Aggregated Large Coastal Shark (LCS...

    Science.gov (United States)

    2013-09-30

    ... Species; Commercial Atlantic Aggregated Large Coastal Shark (LCS), Atlantic Hammerhead Shark, Atlantic Blacknose Shark, and Atlantic Non-Blacknose Small Coastal Shark (SCS) Management Groups AGENCY: National... hammerhead sharks in the Atlantic region, and blacknose sharks and non-blacknose SCS in the Atlantic region...

  19. Physicochemical evaluation of the effects of irradiation and evisceration on the conservation of refrigerated blackfin tuna (Thunnus atlanticus)

    Energy Technology Data Exchange (ETDEWEB)

    Monteiro, Maria L.G.; Marsico, Eliane T. [Universidade Federal Fluminense (UFF), Niteroi, RJ (Brazil). Faculdade de Veterinaria. Dept. de Tecnologia de Alimentos], e-mail: marialuciaguerra@yahoo.com.br, e-mail: elianee@vm.uff.br; Vital, Helio C. [Centro Tecnologico do Exercito (CTEx), Rio de Janeiro, RJ (Brazil). Secao de Defesa Nuclear], e-mail: vital@ctex.eb.br

    2009-07-01

    Tuna is among the most traded fishes in Brazil, however efficiently delaying its fast deterioration is still a major practical challenge. Irradiation has been proposed as a safe and powerful alternative tool for conservation of seafood. This work investigated the effects of irradiation on the physicochemical quality of refrigerated blackfin tuna (Thunnus atlanticus). Analyses of pH, total volatile bases (TVB-N), ammonia and biogenic amines (histamine, cadaverine and putrescine) were performed in order to determine the degree of conservation. The samples were subjected to four different treatments aiming at evaluating the efficiency of irradiation, evisceration and both combined. The figures measured for those parameters, all of them related to the degree of conservation, were found to increase with time regardless of the treatment. In addition, data for irradiated samples remained consistently lower than for unirradiated ones, indicating a better level of preservation that led to an extended shelf life of 14 days. In contrast, excessive levels of those indicators of degradation were found in unirradiated samples after 7 to 10 days of storage. In addition, some evidence was found that evisceration slightly increased quality, consequently promoting a small extension in shelf life of unirradiated samples. Finally, it can be concluded with basis on the results of the physicochemical parameters studied that treatment of fresh refrigerated blackfin tuna by irradiation with 2.5 kGy efficiently preserved freshness and extended the shelf life of the product from 7 to 14 days. (author)

  20. Local Ecological Knowledge (LEK on Fish Behavior Around Anchored FADs: the Case of Tuna Purse Seine and Ringnet Fishers from Southern Philippines

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    Edison D. Macusi

    2017-06-01

    Full Text Available The Fishing Industry in the Philippines plays an important role in the food and employment need of Filipino fishers. By using anchored Fish Aggregating Devices (FADs or payao, the Philippine tuna fisheries was transformed into a million-dollar industry. Minimal studies on exploitation rates and fish behavior around anchored FADs hampered further understanding of this fishery practice. Studies on fish behavior using Local Ecological Knowledge (LEK are good complement where data is limited. A study using semi-structured interview (n = 46 and three focus group discussions (n = 39 participants to record fishers' knowledge and observations on the behavior of different fish species around anchored FADs was conducted. This particularly focused on attraction, retention, and departure behavior of fishes in identified FAD sites. Based on the fishers' knowledge, tuna schools are attracted to anchored FADs at 10 km distance. In anchored FADs, tuna form schools segregated by species and size. There was no relationship between the attraction distance and the reported school size and the various waiting times for fish to aggregate below the FADs. There was no variation between the species present at day or night time although fishers have reported a distinction of species found near the surface (0–10 m and those found at other depths (11–20 m. Juvenile yellowfin tuna (Thunnus albacares, skipjack (Katsuwonus pelamis, and frigate and bullet tunas (Auxis spp. are found to stay at 25–50 m from the FAD at a depth of >20 m. Adult oceanic tunas reside in deeper waters (75 m. The fish visual census produced similar results with the semi-structured interviews and FGDs but did not observe oceanic tunas at depths of 15–20 m in the anchored FADs examined.

  1. Revisiting the vulnerability of juvenile bigeye (Thunnus obesus and yellowfin (T. albacares tuna caught by purse-seine fisheries while associating with surface waters and floating objects.

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    Joe Scutt Phillips

    Full Text Available Tuna fisheries catch over three million tonnes of skipjack tuna (Katsuwonus pelamis each year, the majority of which come from purse-seine vessels targeting fish associated with man-made fish aggregating devices (FADs. A significant challenge for fisheries management is to maximize the efficiency of skipjack tuna catches whilst minimizing the bycatch of small and immature bigeye (Thunnus obesus and yellowfin (T. albacares tuna, for which long-term sustainability is uncertain in 75% of the world's stocks. To better manage the issues common with this fishing method, an improved understanding of tuna behaviour around FADs is necessary. We probabilistically classified the vertical behavioural patterns of 50 bigeye and 35 yellowfin tuna (mean fork length 72cm and 70cm, respectively electronically tagged throughout the western and central Pacific Ocean into shallow and deep states, using a state-space modelling approach. The occurrence of surface-association behaviours, defined as an individual remaining in a shallow state for 24-hours, was examined in relation to known capture events and FAD density. In general, surface-association events for both species were short and lasted on average less than three days, although events as long as 28 days were observed, and were more common in yellowfin when in archipelagic waters. Events were longest immediately following tagging in 62% and 17% of bigeye and yellowfin, respectively. Surface-association behaviour was not generally estimated just prior to recapture, being either non-existent or shorter than two days for 85% of bigeye and 74% of yellowfin. Current management measures in purse-seine tuna fisheries involve periodic or spatial closures for FAD use. If the chief benefit to purse-seine fishers of surface-association around floating objects is in locating schools in horizontal space at short-term time-scales, rather than holding fish near the surface for extended periods, controlling the number of sets

  2. Parasites as biological tags in marine fisheries research: European Atlantic waters.

    Science.gov (United States)

    Mackenzie, K; Hemmingsen, W

    2015-01-01

    Studies of the use of parasites as biological tags for stock identification and to follow migrations of marine fish, mammals and invertebrates in European Atlantic waters are critically reviewed and evaluated. The region covered includes the North, Baltic, Barents and White Seas plus Icelandic waters, but excludes the Mediterranean and Black Seas. Each fish species or ecological group of species is treated separately. More parasite tag studies have been carried out on Atlantic herring Clupea harengus than on any other species, while cod Gadus morhua have also been the subject of many studies. Other species that have been the subjects of more than one study are: blue whiting Micromesistius poutassou, whiting Merlangius merlangus, haddock Melanogrammus aeglefinus, Norway pout Trisopterus esmarkii, horse mackerel Trachurus trachurus and mackerel Scomber scombrus. Other species are dealt with under the general headings redfishes, flatfish, tunas, anadromous fish, elasmobranchs, marine mammals and invertebrates. A final section highlights how parasites can be, and have been, misused as biological tags, and how this can be avoided. It also reviews recent developments in methodology and parasite genetics, considers the potential effects of climate change on the distributions of both hosts and parasites, and suggests host-parasite systems that should reward further research.

  3. PROFIL PEMIJAHAN IKAN TUNA SIRIP KUNING, Thunnus albacares DALAM BAK TERKONTROL DENGAN ANALISIS MITOKONDRIA DNA (mt-DNA

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    Gusti Ngurah Permana

    2016-11-01

    Full Text Available Variasi mitokondria DNA pada ikan tuna sirip kuning, Thunnus albacares menggunakan analisis RFLP (restriction fragment length polymorphism dapat menyediakan data yang akurat dan memberikan bukti tentang profil pemijahan ikan tuna dalam bak terkontrol. Genotipe mt-DNA yang berasal dari induk dibandingkan dengan genotipe yang ada pada telur untuk memonitor dan mengetahui profil dari pemijahan ikan tuna dalam bak terkontrol. Telur dikumpulkan setiap pemijahan dari tahun 2004-2006. Profil pemijahan dari induk betina diamati dari jumlah genotipe yang ditemukan pada telur. Hasil dari penelitian ini adalah 49 induk yang dianalisis ditemukan 42 genotipe, 6 genotipe yang teramati ditemukan pada telur dan 4 diantaranya memiliki genotipe tunggal sedangkan satu genotipe (DABEA dimiliki oleh dua induk. Prakiraan panjang cagak dan bobot induk pada saat memijah adalah 82,2-164 cm and 9,183-28,142 kg. Genotipe yang sama ditemukan hampir setiap hari pada saat sampling selama setahun. Hasil ini mengindikasikan bahwa ikan tuna sirip kuning dapat bertelur sepanjang tahun tergantung kepada suhu air dan kondisi pakan. Study of mitochondrial (mt-DNA variations of yellowfin tuna, Thunnus albacares using (RFLP restriction fragment length polymorphisms can provide evidence of spawning profile of the species in captivity. Mt-DNA genotypes of broodstock were compared with their eggs in order to monitor spawning profile. Spawned eggs were collected on every spawning from 2004 to 2006. The spawning profiles of these females were determined from the genotypes of the eggs. The result showed that from 49  broodstock individuals, 42 genotypes were observed, in which 6 genotypes were observed in their eggs and 4 of them established a single female’s identity and one type (DABEA was shared by two females. Fork length and weight of broodstock female when spawning were ranging from 82.2–164 cm and 9.183-28.142 kg. The same genotypes were observed in almost every sampling

  4. Atlantic Oceanographic and Meteorological Laboratory

    Data.gov (United States)

    Federal Laboratory Consortium — The Atlantic Oceanographic and Meteorological Laboratory conducts research to understand the physical, chemical, and biological characteristics and processes of the...

  5. Feeding tuna oil to the sow at different times during pregnancy has different effects on piglet long-chain polyunsaturated fatty acid composition at birth and subsequent growth.

    Science.gov (United States)

    Rooke, J A; Sinclair, A G; Edwards, S A

    2001-07-01

    In an attempt to prevent decreases in piglet 20 : 4n-6 status at birth while increasing 22 : 6n-3 status, multiparous sows (eight per treatment) were allocated to one of three different treatments: a basal diet fed from day 63 of pregnancy to term; basal diet supplemented with tuna oil (17.5 g/kg) from day 63 to day 91 and then basal diet alone from day 92 to term; basal diet alone from day 63 to day 91 and then basal diet supplemented with tuna oil from day 92 to term. Tuna oil supplementation increased mainly 22 : 6n-3 intake. Supplementation with tuna oil between day 92 and term increased 22 : 6n-3 to a greater extent in all piglet tissues (brain, liver, retina and the remaining carcass) at birth than supplementation with tuna oil between days 63 and 91. However, while piglet 20 : 4n-6 decreased to a greater extent in liver and carcass when diets were supplemented with tuna oil between days 92 and term than between days 63 and 91, in the brain and retina, the reverse was true; 20 : 4n-6 was decreased to a greater extent between days 63 and 91 than between 92 and term. The effect of pregnancy nutrition on the growth of piglets until 7 d postweaning (35 d of age) was assessed after removing any residual effects of pregnancy treatment by cross-fostering some piglets at birth. Piglets, the diets of whose dams had been supplemented with tuna oil during pregnancy, grew faster during the first 35 d of life than the progeny of sows fed only the basal diet. Feeding tuna oil to sows at different times during pregnancy therefore did not prevent decreases in piglet 20 : 4n-6 status at birth, but did suggest that changes in piglet brain 20 : 4n-6 status between days 63 and 91 of pregnancy were not reversible by later nutrition. Supplementing the diet of the pregnant sow with tuna oil had beneficial effects on postnatal piglet growth.

  6. THE SEASONAL VARIABILITY OF CPUE AND CATCH-AT-SIZE DISTRIBUTION OF TROLL AND HANDLINE TUNA FISHERIES LANDED IN LABUHAN LOMBOK

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    Bram Setyadji

    2016-12-01

    Full Text Available Troll and hand line tuna fisheries is one of the major fishing gears landed in Labuhan Lombok coastal fishing port (PPP Labuhan Lombok west Nusa Tenggara Barat province.  Both fisheries are strongly associated with fish aggregating devices (FAD’s. The main fishing ground is Indian Ocean southern part of this province.  Several source of data has been collected regularly. Data analysis comprised of monthlycatch and effort data samples based onport monitoring program during 2012 to 2015. The result showed the diclining of CPUE of yellow fin and skipjack tuna presumably related to fishing intensity of fleets and its variability that landed in PPP Labuhan Lombok.  The increasing CPUE of skipjack tuna in 2014 was predicted due to increasing aggregation around the FADs. Constrasting seasonal fishing index pattern between yellowfin and skipjack tuna foundin 4-month cycles, started in January.A length-weight relationship suggested that yellowfin tuna caught bysmall-scale fisheries were performing allometric growth pattern (b=2.963, r2=0.9737.

  7. Arte, cultura y lucha contra el cáncer en Las Tunas

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    Juan Ernesto Pérez Reyes

    2014-08-01

    Full Text Available Los avances científicos de hoy están permitiendo que el cáncer no se convierta en una sentencia inexorable de muerte. La cronificación del tratamiento plantea retos a los sistemas sanitarios, en su compromiso por ofrecer al enfermo el apoyo para enfrentar su nueva situación y devolverlo a la vida normal. Las complicaciones producto de los tratamientos, los efectos físicos secundarios, la modificación de las rutinas y el sentir que se vive bajo una amenaza, desestabilizan el balance emocional de muchos enfermos. El arte puede captar los más personales aspectos en la experiencia del cáncer. La creación artística puede unir a pacientes, familiares, amigos, al equipo sanitario y a la comunidad en su conjunto, aportando nuevos caminos para ayudar al paciente. La labor artística puede proveer de otros modos de expresión que no se encuentran en las formas tradicionales de tratamiento, permitiendo explorar temas intrínsecos del enfermo de forma creativa y personal. El arte puede comunicar con los aspectos más silenciados de la enfermedad, ayudando a las personas con escasas posibilidades para confesar sus experiencias. Bajo esta premisa el recientemente fundado capítulo provincial de la Sociedad cubana de oncología, radioterapia y medicina nuclear ha efectuado en Las Tunas varias actividades a partir del día tres de febrero del actual año, comenzando con la inauguración de la Jornada provincial de lucha contra el cáncer. La estrategia divulgativa contó con la colaboración del Grupo provincial para el control del cáncer, el Centro provincial del cine y el proyecto FILOARTMED de la Universidad médica de Las Tunas, quienes se han interesado en elevar la producción científica de los profesionales de la salud, que luchan por controlar el cáncer en el territorio. En la sala cinematográfica Titón del Teatro Tunas, se dieron cita los miembros del capítulo provincial de la Sociedad cubana de oncología, radioterapia y medicina

  8. Pertinencia del esquema terapéutico antimicrobiano en las infecciones del tracto urinario, Las Tunas

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    Maité Rúa del Toro

    2015-12-01

    Full Text Available Se realizó un estudio descriptivo de corte transversal, de utilización de medicamentos de tipo indicación-prescripción con elementos de esquema terapéutico, con el objetivo de evaluar la pertinencia del esquema terapéutico de antimicrobianos, para el tratamiento de las infecciones del tracto urinario en la atención primaria de salud en el municipio Las Tunas, en el período comprendido entre enero a diciembre de 2012. El universo estuvo constituido por el total de pacientes con prescripción médica de antimicrobianos por impresión diagnóstica de sepsi o infección urinaria, la muestra fue de 120 pacientes. Los datos se obtuvieron de fuentes primarias y secundarias, procesados por estadística descriptiva, a través del análisis porcentual.  Las infecciones del tracto urinario, baja y alta no complicadas, fueron las que más afectaron a la población. Los antimicrobianos más utilizados: cotrimoxazol, ciprofloxacina y ácido nalidíxico. A la mayoría de los pacientes se les prescribieron terapéuticas antimicrobianas no pertinentes, debido a la selección inadecuada.

  9. Teenage pregnancy, epidemiological behavior in Las Tunas during the period 2012 - 2014

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    Enelis Reyes Reyes

    2015-06-01

    Full Text Available Background: teenage pregnancy is a medical risk to be considered, not only for determining an increase of maternal morbidity and an estimated of 2 to 3 times infant mortality, but also as one of the most important factors in the occurrence of congenital malformations.Objective: to determine the epidemiological behavior of teenage pregnancy in Las Tunas province during the period 2012 - 2014.Methods: a descriptive, observational and retrospective study of the behavior of teenage pregnancy was carried out in the province and time period previously stated. The study was performed in municipalities and People's Councils. The universe consisted of 148 169 women of childbearing age and the sample comprised 3 309 pregnant female teenagers from 12 to 19 years old.Results: the phenomenon of teenage pregnancy continues, but the province and its municipalities show favorable data; 2013 was the one of the most negative results, being Manatí and Amancio municipalities the most significant ones; in all the municipalities there are People's Councils with results that are higher than municipal and provincial averages. The adolescent fertility rate in the province was between 39.0 and 45.2 per 1000, being 2013 and Amancio municipality the ones with the highest incidence.Conclusions: although the teenage pregnancy continues, the province and its municipalities show favorable data, resulting from an integrated and successful health programs, involving Provincial Genetics Network work.

  10. Histidine decarboxylases and their role in accumulation of histamine in tuna and dried saury.

    Science.gov (United States)

    Kanki, Masashi; Yoda, Tomoko; Tsukamoto, Teizo; Baba, Eiichiroh

    2007-03-01

    Histamine-producing bacteria (HPB) such as Photobacterium phosphoreum and Raoultella planticola possess histidine decarboxylase (HDC), which converts histidine into histamine. Histamine fish poisoning (HFP) is attributable to the ingestion of fish containing high levels of histamine produced by HPB. Because freezing greatly decreases the histamine-producing ability of HPB, especially of P. phosphoreum, it has been speculated that HFP is caused by HDC itself from HPB cells autolyzing during frozen storage, even when HPB survive frozen storage. Here we constructed recombinant HDCs of P. phosphoreum, Photobacterium damselae, R. planticola, and Morganella morganii and investigated the ability of HDCs to produce sufficient histamine to cause HFP. To elucidate the character of these HDCs, we examined the specific activity of each recombinant HDC at various temperatures, pH levels, and NaCl concentrations. Further, we also investigated the stability of each HDC under different conditions (in reaction buffer, tuna, and dried saury) at various temperatures. P. damselae HDC readily produced sufficient histamine to cause HFP in fish samples. We consider that if HDC is implicated as an independent cause of HFP in frozen-thawed fish, the most likely causative agent is HDC of P. damselae.

  11. Histidine Decarboxylases and Their Role in Accumulation of Histamine in Tuna and Dried Saury▿

    Science.gov (United States)

    Kanki, Masashi; Yoda, Tomoko; Tsukamoto, Teizo; Baba, Eiichiroh

    2007-01-01

    Histamine-producing bacteria (HPB) such as Photobacterium phosphoreum and Raoultella planticola possess histidine decarboxylase (HDC), which converts histidine into histamine. Histamine fish poisoning (HFP) is attributable to the ingestion of fish containing high levels of histamine produced by HPB. Because freezing greatly decreases the histamine-producing ability of HPB, especially of P. phosphoreum, it has been speculated that HFP is caused by HDC itself from HPB cells autolyzing during frozen storage, even when HPB survive frozen storage. Here we constructed recombinant HDCs of P. phosphoreum, Photobacterium damselae, R. planticola, and Morganella morganii and investigated the ability of HDCs to produce sufficient histamine to cause HFP. To elucidate the character of these HDCs, we examined the specific activity of each recombinant HDC at various temperatures, pH levels, and NaCl concentrations. Further, we also investigated the stability of each HDC under different conditions (in reaction buffer, tuna, and dried saury) at various temperatures. P. damselae HDC readily produced sufficient histamine to cause HFP in fish samples. We consider that if HDC is implicated as an independent cause of HFP in frozen-thawed fish, the most likely causative agent is HDC of P. damselae. PMID:17220267

  12. VARIASI GENETIK IKAN TUNA SIRIP KUNING, Thunnus albacares DENGAN ANALISIS ELEKTROFORESIS ALLOZYME DAN Mt-DNA

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    Gusti Ngurah Permana

    2007-04-01

    Full Text Available Sampel ikan tuna sirip kuning, T. albacares diambil dari tiga lokasi (perairan Bali, Sulawesi Utara, dan Maluku Utara dan dilakukan analisis variasi genetik dengan metode elektroforesis allozyme menggunakan 15 enzim dan mt-DNA dengan 4 enzim restriksi. Hasil penelitian ini diperoleh 4 lokus enzim polimorfik yaitu: Idh-*2 (isocitrate dehydrogenase, Gpi-2* (glucose phoshate dehydrogenase , Mdh-1* (malat e dehydrogenase, dan Est-1* (esterase. Frekuensi alel allozyme terlihat adanya perbedaan yang nyata (Fst = 0,12; P<0,05 antar lokasi yaitu Bali (A, B, C, D, Sulawesi Utara dan Maluku Utara (A, B, C. 15 komposit haplotipe ditemukan pada populasi Bali, Sulawesi Utara, dan Maluku Utara. Haplotype diversity pada populasi Bali 0,886; Sulawesi Utara 0,790; dan Maluku Utara 0,785; dengan rata-rata dari haplotype diversity adalah 0,857. Jarak genetik dari ketiga populasi berkisar antara 0,003--0,023 (rata-rata 0,016. Populasi Maluku Utara dan Sulawesi Utara mempunyai jarak genetik terdekat yaitu 0,003. Hal ini merupakan indikator bahwa Sulawesi Utara dan Maluku Utara sering digunakan sebagai jalur migrasi dengan adanya kesamaan alel yang ditemukan pada kedua populasi tesebut, jika dibandingkan dengan populasi Bali (0,023.

  13. Evaluating alternative management strategies for bigeye tuna, Thunnus obesus, in the Indian Ocean

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    Yuhe Tong

    2013-09-01

    Full Text Available Bigeye tuna (Thunnus obesus support a large commercial fishery in the Indian Ocean. However, explicit management strategies and harvest control rules are yet to be developed for the management of this fishery. We used a stochastic age-structured production model as an operating model to evaluate several potential management strategies under different assumptions of stock productivity. Five management strategies—constant fishing mortality, constant catch, quasi-constant catch, constant escapement, and status-dependent strategies—were evaluated and compared using the performance indicators including average catch, average spawning stock biomass, variation in catch, average fishing mortality and lowest biomass during the time period considered in the simulation. This study shows that (1 for the constant catch strategy, an annual catch of 90000 t would result in a low risk of stock being overfished while obtaining a stable catch; (2 for the constant fishing mortality strategy fishing mortality of 0.3 per year could yield a higher catch, but might have a high probability (64% of stock dropping below the spawning stock biomass (SSB that could achieve maximum sustainable yield (SSBmsy; and (3 for the quasi-constant catch strategy an annual catch of 110000 t was sustainable if the current SSB was higher than SSBmsy. Constant escapement and status-dependent strategies were robust with respect to different levels of virgin recruitment and steepness. This study suggests that it is important to incorporate uncertainties associated with key life history, fisheries and management processes in evaluating management strategies.

  14. Yellowfin Tuna (Thunnusalbacares Fishing Ground Forecasting Model Based On Bayes Classifier In The South China Sea

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    Zhou Wei-feng

    2017-08-01

    Full Text Available Using the yellowfin tuna (Thunnusalbacares,YFTlongline fishing catch data in the open South China Sea (SCS provided by WCPFC, the optimum interpolation sea surface temperature (OISST from CPC/NOAA and multi-satellites altimetric monthly averaged product sea surface height (SSH released by CNES, eight alternative options based on Bayes classifier were made in this paper according to different strategies on the choice of environment factors and the levels of fishing zones to classify the YFT fishing ground in the open SCS. The classification results were compared with the actual ones for validation and analyzed to know how different plans impact on classification results and precision. The results of validation showed that the precision of the eight options were 71.4%, 75%, 70.8%, 74.4%, 66.7%, 68.5%, 57.7% and 63.7% in sequence, the first to sixth among them above 65% would meet the practical application needs basically. The alternatives which use SST and SSH simultaneously as the environmental factors have higher precision than which only use single SST environmental factor, and the consideration of adding SSH can improve the model precision to a certain extent. The options which use CPUE’s mean ± standard deviation as threshold have higher precision than which use CPUE’s 33.3%-quantile and 66.7%-quantile as the threshold

  15. Banning is not enough: The complexities of oceanic shark management by tuna regional fisheries management organizations

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    Mariana Travassos Tolotti

    2015-07-01

    Full Text Available Recently, declining populations of several pelagic shark species have led to global conservation concerns surrounding this group. As a result, a series of species-specific banning measures have been implemented by Regional Fishery Management Organizations (RFMOs in charge of tuna fisheries, which include retention bans, finning bans and trading bans. There are both positive and negative aspects to most management measures, but generally, the positive aspects outweigh the negatives, ensuring the measure is beneficial to the resource and its users in the long term. Banning measures are a good first step towards the conservation of pelagic shark species, especially since they improve conservation awareness among fishers, managers and the public. Measures that impose total bans, however, can lead to negative impacts that may jeopardize the populations they were intended to protect. The majority of pelagic shark catches are incidental and most sharks die before they reach the vessel or after they are released. The legislation set out by RFMOs only prevents retention but not the actual capture or the mortality that may occur as a result. Managers should be fully aware that the development and implementation of mitigation measures are critical for a more effective conservation strategy.

  16. Histamine formation and the freshness of yellowfin tuna (Thunnus albacares stored at different temperatures

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    B.K.K.K. Jinadasa

    2015-12-01

    Full Text Available This study was conducted to investigate the effect of storage temperatures on the shelf life of yellowfin tuna (YFT loins by studying of microbial, chemical and organoleptic changes. Shelf life of YFT was determined through changes in total aerobic bacterial plate counts (APC, total volatile basic nitrogen (TVB-N trimethylamine (TMA, organoleptic properties and histamine development during storage at 0, 4 and 7°C. Based on TVB-N value indices, YFT maintained an acceptable shelf life for 21, 17 and 12 days at 0, 4 and 7°C, respectively. Nevertheless, YFT was rejected earlier by the sensory panellists than their TVB-N value indicated. Histamine development was found to be lower than the European Union safety level for 100 mg/kg fish during storage at 0 and 7°C for 21 and 17 days, respectively. Aerobic bacteria initially dominated the micro-flora on YFT; however, as storage time increased, aerobic bacteria became dominant at cold storage, but the numbers exceeded the International Commission on Microbiological Specifications for Foods (ICMSF limit of 107 cfu/g in storage at 7°C after 17 days. Therefore, it can be concluded that the storage of fresh YFT in below 4°C has good enough to the shelf life of products (two weeks.

  17. CHARACTERISTICS OF GELATIN FROM SWIM BLADDER OF YELLOWFIN TUNA (THUNNUS ALBACORES AS INFLUENCED BY EXTRACTING TEMPERATURES

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    O. Kaewdang

    2015-09-01

    Full Text Available Gelatin was extracted from the swim bladder of yellowfin tuna (Thunnus albacores at different temperatures (60, 70 and 80°C with the extraction yields of 35.6%, 41.1% and 47.3% (dryweight basis, respectively. The α-chains of gelatin decreased with increasing extraction temperatures.Similar amino acid compositions were noticeable among all gelatins, in which glycine constituted the major amino acid. Imino acids ranged from 169 to 172 residues/1,000 residues. Thegel strength of gelatin extracted at lower temperature was higher than that of gelatins extracted at higher temperatures. Gelling and melting temperatures for swim bladder gelatin were 11.07-15.24 and 20.36-22.33°C, respectively. Higher gelling and melting points were observed for gelatin extracted at lower temperatures. Microstructure of gel of gelatin extracted at 60°C was finerwith smaller voids, compared with others. FTIR spectra of obtained gelatins revealed the significant loss of molecular order of the triple-helix. Thus, extraction temperatures showed the directimpact on characteristics of gelatin from swim bladder.

  18. The biological oceanography of the East Australian Current and surrounding waters in relation to tuna and billfish catches off eastern Australia

    Science.gov (United States)

    Young, J. W.; Hobday, A. J.; Campbell, R. A.; Kloser, R. J.; Bonham, P. I.; Clementson, L. A.; Lansdell, M. J.

    2011-03-01

    The surface and sub-surface biological oceanography of tuna fishing grounds within the East Australian Current (EAC) was compared in 2004 with two other fishing areas further offshore. Our aim was to determine whether the biological oceanography of the region could explain the distribution and intensity of pelagic fishery catches inside and outside the EAC at that time. The EAC fishing area was noticeably warmer, less saline and lower in nutrients than waters in the other fishing areas. The EAC waters were dominated by large diatoms, the biomass of which was significantly higher than in the seamount and offshore areas, apparently the result of a cold core eddy beneath the EAC surface filament. Over the seamount and offshore more typical Tasman Sea waters prevailed, although the presence of a relatively deeper oxygen minimum layer over the seamount suggested topographically induced mixing in the area. Notably, sub-surface zooplankton and micronekton biomass was significantly higher around the seamount than in the two other areas. The offshore region was characterised by frontal activity associated with the Tasman front. Micronekton net biomass was generally highest in surface waters in this region. Examination of tuna catch records at that time showed yellowfin tuna ( Thunnus albacares) dominated the catches of the EAC, whereas swordfish ( Xiphias gladius) and bigeye tuna ( Thunnus obesus) were the main species caught offshore. We suggest the yellowfin tuna concentrate in waters that are not only warmer but where prey species are concentrated near the surface. Offshore, deeper living species such as swordfish and bigeye tuna ( T. obesus) can take advantage of prey species that are distributed deeper in the water column and along the flanks of the many seamounts in the region, or that are concentrated at fronts associated with the Tasman Front. Although only a snapshot of the region, relatively consistent catch data over time suggests the underlying biological

  19. MOTIVASI WARGA BELAJAR DALAM MENGIKUTI PENDIDIKAN KESETARAAN PROGRAM KELOMPOK BELAJAR PAKET C DI PUSAT KEGIATAN BELAJAR MASYARAKAT TUNAS BANGSA BREBES

    Directory of Open Access Journals (Sweden)

    Riski Arum Senjawati

    2017-03-01

    Full Text Available Motivasi warga belajar adalah dorongan yang terdapat pada warga belajar baik kondisi fisik dan psikologis untuk mencapai tujuan tanpa memandang batas usia. Tujuan penelitian ini untuk mendeskripsikan motivasi warga belajar dan faktor-faktor yang mempengaruhi warga belajar dalam mengikuti pendidikan kesetaraan program paket C di PKBM Tunas bangsa Brebes. Penelitian ini menggunakan pendekatan deskriptif kualitatif. Lokasi penelitian di PKBM Tunas Bangsa Brebes. Pengumpulan data dengan wawancara, observasi, dan dokumetasi. Subjek penelitian 4 warga belajar paket C, 1 tutor paket C, 1 pengelola PKBM dan 1 tokoh masyarakat. Keabsahan data menggunakan triangulasi sumber dan teori. Metode analisis data melaui reduksi data, display data, dan verifikasi data. Hasil penelitian ini menunjukkan keaktifan, kehadiran,  kesiapan warga belajar serta semanagat  dalam mengikuti paket C masih rendah, sarana prasarana yang memadai belum maksimal. Warga belajar mengikuti paket  C dengan harapan memperoleh ijazah setara SMA/MA sebagai persyaratan pekerjaan, serta pendidikan ke jenjang lebih tinggi. Faktor internal yang mempengaruhi motivasi warga  belajar yaitu kondisi  jasmani dan rohani sedangkan faktor eksternal yaitu lingkungan sosial, latar belakang keluarga, tingkat pendidikan orang tua, dan ekonomi.Motivation people learn is the urge residents who are on the learners both physical and psychological conditions to achieve goals regardless of the age limit. The purpose of this study to describe the motivations of learning and the factors that affect learners in following equality education program package C in PKBM Tunas bangsa Brebes. This study used a qualitative descriptive approach. Locations of research in PKBM Tunas Bangsa Brebes. Data collection through interviews, observation , and Documentation. 4 research subjects residents to learn the package C, 1 tutor package C , 1 and 1 manager CLC community leaders . The validity of the data using

  20. Risk Factors for Seabird Bycatch in a Pelagic Longline Tuna Fishery.

    Directory of Open Access Journals (Sweden)

    Eric Gilman

    Full Text Available Capture in global pelagic longline fisheries threatens the viability of some seabird populations. The Hawaii longline tuna fishery annually catches hundreds of seabirds, primarily Laysan (Phoebastria immutabilis and black-footed (P. nigripes albatrosses. Since seabird regulations were introduced in 2001, the seabird catch rate has declined 74%. However, over the past decade, seabird catch levels significantly increased due to significant increasing trends in both effort and nominal seabird catch rates. We modelled observer data using a spatio-temporal generalized additive mixed model with zero-inflated Poisson likelihood to determine the significance of the effect of various risk factors on the seabird catch rate. The seabird catch rate significantly increased as annual mean multivariate ENSO index values increased, suggesting that decreasing ocean productivity observed in recent years in the central north Pacific may have contributed to the increasing trend in nominal seabird catch rate. A significant increasing trend in number of albatrosses attending vessels, possibly linked to declining regional ocean productivity and increasing absolute abundance of black-footed albatrosses, may also have contributed to the increasing nominal seabird catch rate. Largest opportunities for reductions are through augmented efficacy of seabird bycatch mitigation north of 23° N where mitigation methods are required and during setting instead of during hauling. Both side vs. stern setting, and blue-dyed vs. untreated bait significantly reduced the seabird catch rate. Of two options for meeting regulatory requirements, side setting had a significantly lower seabird catch rate than blue-dyed bait. There was significant spatio-temporal and seasonal variation in the risk of seabird capture with highest catch rates in April and May and to the northwest of the main Hawaiian Islands.

  1. 77 FR 69596 - Atlantic Highly Migratory Species; Advisory Panel for Atlantic Highly Migratory Species Southeast...

    Science.gov (United States)

    2012-11-20

    ... National Oceanic and Atmospheric Administration RIN 0648-XC321 Atlantic Highly Migratory Species; Advisory Panel for Atlantic Highly Migratory Species Southeast Data, Assessment, and Review Workshops AGENCY... (AP) for Atlantic Highly Migratory Species (HMS) Southeast Data, Assessment, and Review (SEDAR...

  2. Rasgos epidemiológicos de ciegos y débiles visuales por retinosis pigmentaria en la provincia Las Tunas Epidemiologic traits of the blind and visually handicapped due to retinitis pigmantosa in the province of Las Tunas

    Directory of Open Access Journals (Sweden)

    Luisa González Hess

    2003-06-01

    Full Text Available Se estudiaron 325 pacientes con el diagnóstico retinosis pigmentaria en la provincia Las Tunas. De ellos, se encontró que el 24,9 y el 10 % eran ciegos y débiles visuales respectivamente, donde se obtuvo una tasa de ciegos por retinosis pigmentaria de 1,45 x 10 000 habitantes y de débiles visuales de 0,6 x 10 000 habitantes. El tipo de herencia que predominó en ambos grupos fue la autosómica recesiva.325 patients with the diagnosis of retinitis pigmentosa were studied in the province of Las Tunas. Of them, it was found that 24.9 % and 10 % were blind and visually handicapped, respectively. A rate of blind patients caused by retinitis pigmentosa of 1.45 x 10 000 inhabitants and of visually handicapped of 0.6 x 10 000 inhabitants was obtained. The type of inheritance predominating in both groups was the autosomal recessive inheritance.

  3. Microencapsulated krill and tuna oil blend raises plasma long-chain n-3 polyunsaturated fatty acid levels compared to tuna oil with similar increases in ileal contractility in rats.

    Science.gov (United States)

    Patten, Glen S; Sanguansri, Luz; Augustin, Mary Ann; Abeywardena, Mahinda Y; Bird, Anthony R; Patch, Craig S; Belobrajdic, Damien P

    2017-03-01

    Long-chain n-3 polyunsaturated fatty acids (LC n-3 PUFA) may be more bioavailable from krill oil compared to fish oil due to their phospholipid structure. We tested whether a microencapsulated krill and tuna oil blend (ME-TOKO) provided greater LC n-3 PUFA bioavailability, improved blood lipid profiles and increased intestinal contractility compared to microencapsulated tuna oil (ME-TO). Rats were divided into three groups to receive isocaloric diets containing ME-TO, ME-TOKO and microencapsulated olive oil (ME-OO) at 0.3 or 2 g/100 g for 4 weeks. Final body and organ weights, feed intake and waste output were similar. ME-TOKO rats had higher plasma total LC n-3 PUFA levels compared to ME-TO, but liver LC n-3 PUFA levels and plasma triglyceride and cholesterol levels were similar in non-fasted rats. Diets containing 2% ME-TO and ME-TOKO also showed similar increases in ileal contractility. In summary, ME-TO bioavailability of LC n-3 PUFA was similar to ME-TOKO.

  4. An Assessment of Near Surface Biological Volume Scattering off the Continental Shelf of Virginia.

    Science.gov (United States)

    1991-07-01

    species, bluefin tuna, Thunnus thynnus; yellowfin tuna, Thunnus albacares; albacore, Thunnus alalunga; and swordfish, Xiphias gladius , are reported from...applications. John Wiley and Sons, New York, 544 pp. Carey, F. G. and B. H. Robison (1981). Daily patterns in the activities of swordfish, Xiphias gladius

  5. FISHING GROUND, CACTH COMPOSITION, HOOK RATE AND LENGTH DISTRIBUTION OF BILLFISHES CAUGHT BY TUNA LONG LINE IN INDIAN OCEAN

    Directory of Open Access Journals (Sweden)

    Fathur Rochman

    2013-12-01

    Full Text Available Billfishes area by cacth of tuna long line vessels in Indian Ocean. Billfish are consist of swordfish Xiphias gladius, black marlin Makaira indica, indo facific blue marlin Makaira mazara, stripe marlin Tetrapturus audax, indo facific sailfish Istiophorus platypterus and shortbill spearfish Tetrapturus angustirostris. Besides that, billfishes also have important economic value compared with tuna as an exsported species such as swordfish and marlin. To optimize the catch of billfishes in Indian Ocean, data and information of potential fishing ground, size and catch composition of this species are needed. The billfishes cacth composition collected in 2011 were dominated by 45% swordfish, 20% black marlin, 19% blue marlin,9% short bill spearfish, 6% sailfish and 1%stripe marlin. The billfishes size range which were caught between 60 - 280 cm LJFL (Lower Jaw Fork Length. The sword fish average length was 150 cm, blue marlin 197 cm, black Marlin 189 cm, sailfish 150cm ,short bill spearfish 144 cm and stripe marlin159 cm. From this observation, it was found that most of billfishes caught were in mature.

  6. Fisher-Level Decision Making to Participate in Fisheries Improvement Projects (FIPs for Yellowfin Tuna in the Philippines.

    Directory of Open Access Journals (Sweden)

    Frazen Tolentino-Zondervan

    Full Text Available This study identifies the capabilities needed by small-scale fishers to participate in Fishery Improvement Projects (FIPs for yellowfin tuna in the Philippines. The current literature provides little empirical evidence on how different models, or types of FIPs, influence the participation of fishers in their programs and the degree which FIPs are able to foster improvements in fishing practices. To address this literature gap, two different FIPs are empirically analysed, each with different approaches for fostering improvement. The first is the non-governmental organisation-led Partnership Programme Towards Sustainable Tuna, which adopts a bottom-up or development oriented FIP model. The second is the private-led Artesmar FIP, which adopts a top-down or market-oriented FIP approach. The data were obtained from 350 fishers surveyed and were analysed using two separate models run in succession, taking into consideration full, partial, and non-participation in the two FIPs. The results demonstrate that different types of capabilities are required in order to participate in different FIP models. Individual firm capabilities are more important for fishers participation in market-oriented FIPs, which use direct economic incentives to encourage improvements in fisher practices. Collective capabilities are more important for fishers to participate in development-oriented FIPs, which drive improvement by supporting fishers, fisher associations, and governments to move towards market requirements.

  7. Fisher-Level Decision Making to Participate in Fisheries Improvement Projects (FIPs) for Yellowfin Tuna in the Philippines

    Science.gov (United States)

    Berentsen, Paul; Bush, Simon R.; Digal, Larry; Oude Lansink, Alfons

    2016-01-01

    This study identifies the capabilities needed by small-scale fishers to participate in Fishery Improvement Projects (FIPs) for yellowfin tuna in the Philippines. The current literature provides little empirical evidence on how different models, or types of FIPs, influence the participation of fishers in their programs and the degree which FIPs are able to foster improvements in fishing practices. To address this literature gap, two different FIPs are empirically analysed, each with different approaches for fostering improvement. The first is the non-governmental organisation-led Partnership Programme Towards Sustainable Tuna, which adopts a bottom-up or development oriented FIP model. The second is the private-led Artesmar FIP, which adopts a top-down or market-oriented FIP approach. The data were obtained from 350 fishers surveyed and were analysed using two separate models run in succession, taking into consideration full, partial, and non-participation in the two FIPs. The results demonstrate that different types of capabilities are required in order to participate in different FIP models. Individual firm capabilities are more important for fishers participation in market-oriented FIPs, which use direct economic incentives to encourage improvements in fisher practices. Collective capabilities are more important for fishers to participate in development-oriented FIPs, which drive improvement by supporting fishers, fisher associations, and governments to move towards market requirements. PMID:27732607

  8. Evaluation of FAD-associated purse seine fishery reduction strategies for bigeye tuna ( Thunnus obesus) in the Indian Ocean

    Science.gov (United States)

    Tong, Yuhe; Chen, Xinjun; Xu, Liuxiong; Chen, Yong

    2013-07-01

    In the Indian Ocean, bigeye tuna supports one of the most important fisheries in the world. This fishery mainly consists of two components: longline and purse seine fisheries. Evidence of overfishing and stock depletion of bigeye tuna calls for an evaluation of alternative management strategies. Using an age-structured operating model, parameterized with the results derived in a recent stock assessment, we evaluated the effectiveness of applying constant fishing mortality (CF) and quasi-constant fishing mortality (QCF) strategies to reduce fishing effort of purse seining with fish aggregating devices (FADs) at different rates. Three different levels of productivity accounted for the uncertainty in our understanding of stock productivity. The study shows that the results of CF and QCF are similar. Average SSB and catch during simulation years would be higher if fishing mortality of FAD-associated purse seining was reduced rapidly. The banning or rapid reduction of purse seining with FAD resulted in a mean catch, and catch in the last simulation year, higher than that of the base case in which no change was made to the purse seine fishery. This could be caused by growth overfishing by purse seine fisheries with FADs according to the per-recruit analysis. These differences would be more obvious when stock productivity was low. Transferring efforts of FAD-associated purse seining to longline fisheries is also not feasible. Our study suggests that changes are necessary to improve the performance of the current management strategy.

  9. FINANCIAL DISTRESS DENGAN METODE SPRINGATE, ZMIJEWSKI, FULMER DAN ALTMAN Z-SCORE PADA PT TUNAS BARU LAMPUNG TBK DI BEI

    Directory of Open Access Journals (Sweden)

    Umi ambarwati

    2017-03-01

    Full Text Available This research aims to analyze the company condition using Altman Z –Score, Springate, Zmijewski and Fulmer method at PT Tunas Baru Lampung TBK in Bursa Efek Indonesia in 2013 -2015 year. The data used is Seconder data coming from PT Tunas Baru Lampung TBK in 2013-2015 year. This research uses quantitative research with two data collections, those are documentation and theoretical study method. The result of research shows that : (1 According to Altman Z- Score in 2013 and 2015, it had bankrupt while it was on grey area in 2014. (2 According to Springate, in 2013-2015 it had bankrupt because it was under the criteria of company condition value. (3 According to Zmijewski, it was on good condition with the negative result in 2013-2015. (4 According to Fulmer, in 2013 nd 2014 it was on good condition, but in 2015 conditions experienced bankrupt. According to the result of research, it is hoped to improve the sale, do the effective strategy, and force the operational cost in order to be efficient so the company can fulfill the company condition value.

  10. Valorisation of tuna processing waste biomass for recovery of functional and antioxidant peptides using enzymatic hydrolysis and membrane fractionation process.

    Science.gov (United States)

    Saidi, Sami; Ben Amar, Raja

    2016-10-01

    The enzymatic hydrolysis using Prolyve BS coupled to membrane process (Ultrafiltration (UF) and nanofiltration (NF)) is a means of biotransformation of tuna protein waste to Tuna protein hydrolysate (TPH) with higher added values. This method could be an effective solution for the production of bioactive compounds used in various biotechnological applications and minimizing the pollution problems generated by the seafood processing industries. The amino acid composition, functional and antioxidant properties of produced TPH were evaluated. The results show that the glutamic acid, aspartic acid, glycine, alaline, valine and leucine were the major amino acids detected in the TPH profile. After membrane fractionation process, those major amino acids were concentrated in the NF retentate (NFR). The NFR and NF permeate (NFP) have a higher protein solubility (>95 %) when compared to TPH (80 %). Higher oil and water binding capacity were observed in TPH and higher emulsifying and foam stability was found in UF retentate. The NFP showed the highest DPPH radical scavenging activity (65 %). The NFR contained antioxidant amino acid (30.3 %) showed the highest superoxide radical and reducing power activities. The TPH showed the highest iron chelating activity (75 %) compared to other peptide fractions. The effect of the membrane fractionation on the molecular weight distribution of the peptide and their bioactivities was underlined. We concluded that the TPH is a valuable source of bioactive peptides and their peptide fractions may serve as useful ingredients for application in food industry and formulation of nutritional products.

  11. Atlantic Flyway Breeding Waterfowl Survey

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — The Atlantic Flyway Technical Section initiated this breeding waterfowl survey in 11 northeast states ranging from New Hampshire to Virginia.

  12. Virginia Atlantic Coast Recreational Use

    Data.gov (United States)

    Virginia Department of Environmental Quality — As a member of the Mid-Atlantic Regional Council on the Ocean (MARCO), Virginia, through its Coastal Zone Management (CZM) Program, collected information on how the...

  13. Atlantic Offshore Seabird Dataset Catalog

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — Several bureaus within the Department of Interior compiled available information from seabird observation datasets from the Atlantic Outer Continental Shelf into a...

  14. VA Atlantic Coast Recreational Use

    Data.gov (United States)

    Virginia Department of Environmental Quality — As a member of the Mid-Atlantic Regional Council on the Ocean (MARCO), Virginia, through its Coastal Zone Management (CZM) Program, collected information on how the...

  15. Atlantic Flyway Sea Duck Survey

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — The Atlantic Flyway Sea Duck Survey, conducted from 1991 to 2002 by the U.S. Fish and Wildlife Service, was established to record sea duck numbers using near shore...

  16. The age of the Tunas formation in the Sauce Grande basin-Ventana foldbelt (Argentina): Implications for the Permian evolution of the southwestern margin of Gondwana

    Science.gov (United States)

    López-Gamundí, Oscar; Fildani, Andrea; Weislogel, Amy; Rossello, Eduardo

    2013-08-01

    New SHRIMP radiogenic isotope dating on zircons in tuffs (280.8 ± 1.9 Ma) confirms the Early Permian (Artinskian) age of the uppermost section of the Tunas Formation. Tuff-rich levels in the Tunas Formation are exposed in the Ventana foldbelt of central Argentina; they are part of a deltaic to fluvial section corresponding to the late overfilled stage of the Late Paleozoic Sauce Grande foreland basin. Recent SHRIMP dating of zircons from the basal Choiyoi volcanics exposed in western Argentina yielded an age of 281.4 ± 2.5 Ma (Rocha-Campos et al., 2011). The new data for the Tunas tuffs suggest that the volcanism present in the Sauce Grande basin can be considered as the distal equivalent of the earliest episodes of the Choiyoi volcanism of western Argentina. From the palaeoclimatic viewpoint the new Tunas SHRIMP age confirms that by early Artinskian glacial conditions ceased in the Sauce Grande basin and, probably, in adajacent basins in western Gondwana.

  17. Formation of histamine and biogenic amines in cold-smoked tuna: An investigation of psychrotolerant bacteria from samples implicated in cases of histamine fish poisoning

    DEFF Research Database (Denmark)

    Emborg, Jette; Dalgaard, Paw

    2006-01-01

    Two outbreaks and a single case of histamine fish poisoning associated with cold-smoked tuna (CST) were reported in Denmark during 2004. The bacteria most likely responsible for histamine formation in CST implicated in histamine fish poisoning was identified for the first time in this study...

  18. Present and Future Potential Habitat Distribution of Carcharhinus falciformis and Canthidermis maculata By-Catch Species in the Tropical Tuna Purse-Seine Fishery under Climate Change

    NARCIS (Netherlands)

    Lezama-Ochoa, N.; Murua, H.; Chust, G.; Van Loon, E.; Ruiz, J.; Hall, M.; Chavance, P.; Delgado De Molina, A.; Villarino, E.

    By-catch species from tropical tuna purse seine fishery have been affected by fishery pressures since the last century; however, the habitat distribution and the climate change impacts on these species are poorly known. With the objective of predicting the potential suitable habitat for a shark

  19. Anesthesia induces stress in Atlantic salmon (Salmo salar), Atlantic cod (Gadus morhua) and Atlantic halibut (Hippoglossus hippoglossus).

    Science.gov (United States)

    Zahl, Inger Hilde; Kiessling, Anders; Samuelsen, Ole Bent; Olsen, Rolf Erik

    2010-09-01

    Stress in response to anesthesia with benzocaine, MS-222, metomidate and isoeugenol was studied in Atlantic salmon (Salmo salar), Atlantic halibut (Hippoglossus hippoglossus), and Atlantic cod (Gadus morhua) with no concomitant stress from handling or confinement in association with anesthesia or sampling. All of the anesthetics tested induced a stress response in all species, displayed by a release of cortisol to the water. MS-222 anesthesia elicited the highest cortisol release rates, reaching maximum levels 0.5 h post-exposure and returning to basal levels after 3-4 h. Benzocaine anesthesia caused a bimodal response where the initial peak in cortisol release rate was followed by a second increase lasting towards the end of the trial (6 h). This bimodality was more profound in Atlantic salmon than in Atlantic halibut and Atlantic cod. Metomidate anesthesia induced the lowest release of cortisol of the agents tested in both Atlantic halibut and Atlantic cod, but resulted in a bimodal response in Atlantic salmon where the initial increase in cortisol release was followed by a larger increase peaking at 2-2.5 h post exposure before returning to basal levels after 5 h. The stress induced in Atlantic salmon by isoeugenol anesthesia resembled that of MS-222, but did not reach the same elevated level. Overall, the cortisol release was most profound in Atlantic salmon followed by Atlantic halibut and Atlantic cod.

  20. Potencial forrajero de cuatro cultivares de Pennisetum purpureum en un suelo Pardo de Las Tunas

    Directory of Open Access Journals (Sweden)

    L. M García

    Full Text Available Con el objetivo de evaluar el comportamiento productivo de cuatro cultivares de Pennisetum purpureum (king-grass, Cuba CT-169, Cuba CT-115 y taiwán morado, se realizó un experimento en un suelo Pardo grisáceo, en la Estación Experimental de Pastos y Forrajes de Las Tunas (Cuba. El suelo se preparó con laboreo mínimo, y se empleó una distancia de plantación de 0,90 m de camellón por 0,60 m de narigón. La edad de la semilla utilizada fue de 90 días y la profundidad de siembra, de 15-20 cm. El estudio se realizó durante dos años, en condiciones de secano y sin fertilización. El diseño fue de bloques al azar, con cinco réplicas. La dinámica de crecimiento mostró un patrón similar en todos los cultivares, y se destacó ligeramente el Cuba CT-169. La mayor altura en el primer año se alcanzó en el periodo mayo-julio, y en el segundo, en julio-septiembre. En el primer año no existieron diferencias en el rendimiento de MS entre los cultivares, en una misma época; mientras que en el segundo hubo diferencias significativas en la época lluviosa y en el total anual, y el CT-169 difirió significativamente del resto (37,7 y 43,8 t de MS/ha, respectivamente. En la época poco lluviosa los cultivares tuvieron un comportamiento similar. El porcentaje de hojas no difirió en ambas épocas del primer año; mientras que en el segundo los cultivares mostraron diferencias significativas en la época poco lluviosa, y el CT-169 superó en 3-5 unidades porcentuales al resto. Se concluye que en las condiciones edafoclimáticas del presente estudio el cv. CT-169 tuvo el mejor comportamiento.

  1. MODEL MATEMATIKA HUBUNGAN BOBOT TUBUH DENGAN UKURAN FLIPPER TUKIK PENYU LEKANG YANG DIBERI PAKAN IKAN TUNA VERSUS UDANG DALAM BENTUK PELLET SAMPAI UMUR TIGA BULAN

    Directory of Open Access Journals (Sweden)

    I KETUT SUKADA

    2014-06-01

    Full Text Available Penelitian ini bertujuan untuk mencari hubungan bobot tubuh dengan lebar flippers depan dan flipper belakang sebagai alat untuk berenang dan menyelam. Penelitian dilaksanakan selama 12 minggu menggunakan Rancangan Acak Lengkap yang dianalisis dengan Analisis Variant. Perlakuan A: ikan tuna 100%, B: ikan tuna 75% udang 25%, C: ikan tuna 50% udang 50%, D: ikan tuna 25% udang 25% dan E udang 100%. Perlakuan diulang 5 kali dan setiap ulangan diulang 3 kali sehingga tukik yang digunakan sebanyak 75 ekor. Hasil penelitian: Bobot tubuh menunjukkan perbedaan yang sangat nyata (P<0,01 dengan urutan:Perlakuan A; 80,3040 g. B; 76,2580 g. C; 66,6720 g. D; 63,2020 g. E; 57,8240 g. Lebar pliffes depan menunjukkan perbedaan yang nyata (P<0,05 dengan urutan masing-masing perlakuan adalah : B;1,8000 cm. C;1,8500 cm. A; 1,8000 cm. D; 1,7700 cm. dan E; 1,6000 cm. Berat pliffes depan menunjukkan perbedaan yang sangat nyata (P<0,01 dengan urutan masing-masing perlakuan adalah : A; 14,7550 g. B; 14,5350 g. C; 12,6950 g. D; 10,3950 g. dan E; 8,8600 g. Korelasi bobot tubuh terhadap lebar flippers depan Y=7,0830530 e1,1436892 x R2= 0,738308491. Kandungan protein dari masingmasing perlakuan A; 22%, B; 20%, C; 19%, D; 18% dan E; 17%. Retensi protein dan retensi energi tukik yang diberi perlakuan A nyata lebih tinggi (P<0,05 yaitu RP; 77,9765a (%, RE ; 75,7464a % dibandingkan retensi protein dan retensi energi tukik yang diberikan perlakuan E yaitu RP; 45,1076e (%, RE; 43,4060e %. Pada kesimpulannya respon pertumbuhan tukik penyu lekang yang diberi pakan ikan tuna lebih banyak dibandingkan udang lebih baik.

  2. 77 FR 52314 - Atlantic Highly Migratory Species; Meeting of the Atlantic Highly Migratory Species Advisory Panel

    Science.gov (United States)

    2012-08-29

    ... tuna management (Amendment 7), shark management measures such as rebuilding scalloped hammerhead, dusky, and blacknose sharks (Amendment 5) and catch shares, swordfish management measures (Amendment 8), and..., swordfish, billfish, and sharks. The AP has previously consulted with NMFS on: Amendment 1 to the Billfish...

  3. 76 FR 72383 - Atlantic Highly Migratory Species; Atlantic Shark Management Measures

    Science.gov (United States)

    2011-11-23

    ... Administration 50 CFR Part 635 RIN 0648-BA17 Atlantic Highly Migratory Species; Atlantic Shark Management...) and fishery management plan (FMP) amendment that would consider catch shares for the Atlantic shark... design elements for potential catch shares programs in the Atlantic shark fisheries. Additionally, NMFS...

  4. First record of Philometra katsuwoni (Nematoda, Philometridae), a parasite of skipjack tuna Katsuwonus pelamis (Perciformes, Scombridae), off South American Atlantic coast

    Czech Academy of Sciences Publication Activity Database

    Cárdenas, M. Q.; Moravec, František; Kohn, A.

    2009-01-01

    Roč. 9, č. 2 (2009), s. 263-266 ISSN 1676-0611 Institutional research plan: CEZ:AV0Z60220518 Keywords : Philometra * Katsuwonus * Brazil Subject RIV: GJ - Animal Vermins ; Diseases, Veterinary Medicine

  5. Atlantic menhaden processing plant test tagging data

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Atlantic menhaden are a schooling forage fish species, which are subject to a large commercial purse seine fishery. Atlantic menhaden are harvested for reduction...

  6. Atlantic NAD 83 OCS Planning Areas

    Data.gov (United States)

    Bureau of Ocean Energy Management, Department of the Interior — This data set contains BOEM Planning Area outlines in ESRI shapefile format for the BOEM Atlantic Region. The old Atlantic Planning Area outlines were changed as of...

  7. Atlantic Seaduck Project

    Science.gov (United States)

    Perry, M.C.; Hanson, Alan; Kerekes, Joseph; Paquet, Julie

    2006-01-01

    Atlantic Seaduck Project is being conducted to learn more about the breeding and moulting areas of seaducks in northern Canada and more about their feeding ecology on wintering areas, especially Chesapeake Bay. Satellite telemetry is being used to track surf scoters wintering in Chesapeake Bay, Maryland and black scoters on migrational staging areas in New Brunswick, Canada to breeding and moulting areas in northern Canada. Various techniques used to capture the scoters included mist netting, night-lighting, and net capture guns. All captured ducks were transported to a veterinary hospital where surgery was conducted following general anaesthesia procedures. A PTT100 transmitter (39 g) manufactured by Microwave, Inc., Columbia, Maryland was implanted into the duck?s abdominal cavity with an external (percutaneous) antenna. Eight of the surf scoters from Chesapeake Bay successfully migrated to possible breeding areas in Canada and all 13 of the black scoters migrated to suspected breeding areas. Ten of the 11 black scoter males migrated to James Bay presumably for moulting. Updated information from the ARGOS Systems aboard the NOAA satellites on scoter movements was made accessible on the Patuxent Website. Habitat cover types of locations using GIS (Geographical Information Systems) and aerial photographs (in conjunction with remote sensing software) are currently being analyzed to build thematic maps with varying cosmetic layer applications. Many factors related to human population increases have been implicated in causing changes in the distribution and abundance of wintering seaducks. Analyses of the gullet (oesophagus and proventriculus) and the gizzard of seaducks are currently being conducted to determine if changes from historical data have occurred. Scoters in the Bay feed predominantly on the hooked mussel and several species of clams. The long-tailed duck appears to select the gem clam in greater amounts than other seaducks, but exhibits a diverse diet of

  8. Selected-ion storage GC-MS analysis of polycyclic aromatic hydrocarbons in palm dates and tuna fish

    Energy Technology Data Exchange (ETDEWEB)

    Al-Omair, A.; Helaleh, M.I.H. [Kuwait Inst. for Scientific Research (KISR), Central Analytical Lab. (CAL), Safat (Kuwait)

    2004-06-01

    A rapid analytical method based on Soxhlet extraction has been developed for determination of polycyclic aromatic hydrocarbons (PAH) in palm dates and tuna fish. The method is based on selected ion-storage gas chromatography-mass spectrometry. In the work discussed we were interested in the analysis of 16 polycyclic aromatic hydrocarbons (PAH) regarded by the EPA as priority pollutants. Soxhlet extraction of real, fortified, and blank samples, with hexane as solvent, was used to extract the analytes of interest. An excellent detection limit and good relative standard deviations (RSD) were obtained and analysis time was short. The linearity and sensitivity of the method for measurement of these analytes at trace levels are discussed. (orig.)

  9. Efectividad del tratamiento acupuntural en la Parálisis Facial Periférica. Puerto Padre, Las Tunas

    OpenAIRE

    Dorania Cera Barea; José Ramón Martínez Pérez; Rubiseida Almaguer Pérez; Dennis Ballester Domínguez

    2015-01-01

    Se realizó un estudio experimental en pacientes mayores de 19 años, con Parálisis Facial Periférica, que fueron atendidos en el Policlínico "Romárico Oro Peña" del municipio de Puerto Padre, provincia de Las Tunas; en el período comprendido entre enero y diciembre del año 2011. La muestra quedó conformada por 40 pacientes que cumplieron con los criterios de inclusión establecidos, a los que se les aplicó el método acupuntural, con el objetivo de evaluar la efectividad del mismo en el tratamie...

  10. Atlantic CFC data in CARINA

    Directory of Open Access Journals (Sweden)

    R. Steinfeldt

    2010-01-01

    Full Text Available Water column data of carbon and carbon-relevant parameters have been collected and merged into a new database called CARINA (CARbon IN the Atlantic. In order to provide a consistent data set, all data have been examined for systematic biases and adjusted if necessary (secondary quality control (QC. The CARINA data set is divided into three regions: the Arctic/Nordic Seas, the Atlantic region and the Southern Ocean. Here we present the CFC data for the Atlantic region, including the chlorofluorocarbons CFC-11, CFC-12 and CFC-113 as well as carbon tetrachloride (CCl4. The methods applied for the secondary quality control, a crossover analyses, the investigation of CFC ratios in the ocean and the CFC surface saturation are presented. Based on the results, the CFC data of some cruises are adjusted by a certain factor or given a "poor'' quality flag.

  11. Evaluación del estado mental de los pacientes centenarios en Las Tunas, diciembre 2007- agosto 2008

    Directory of Open Access Journals (Sweden)

    Lisset del Carmen Romero Portelles

    2015-12-01

    Full Text Available El envejecimiento de la población en Cuba es similar al de muchos países desarrollados, y se encuentra entre los que tienen un índice más elevado dentro del grupo de países en desarrollo. Se realizó un trabajo descriptivo observacional  en la provincia de Las Tunas, en el período diciembre 2007- agosto 2008, con el propósito de caracterizar el estado cognitivo-afectivo de los centenarios. El universo estuvo  constituido por 97 ancianos; una vez validada su edad, la muestra quedó conformada con 95 centenarios. Se aplicaron los instrumentos Mini-Mental State Examination (MMSE y Clinical Dementia Rating Scale (CDR y se estudiaron las siguientes variables: estado cognitivo, estado de ánimo, satisfacción con la vida, nivel de tensión y la percepción de eventos vitales. El dato primario provino de las entrevistas realizadas, y para el análisis estadístico se creó una hoja de cálculo en Excel. Se utilizaron técnicas de distribución de frecuencias; para las variables cuantitativas se empleó la proporción en porcentaje. En la muestra de individuos centenarios que vivían en la provincia de Las Tunas, al momento del estudio, predominaron los que no presentaban deterioro cognitivo ni depresión, tuvieron  satisfacción alta con la vida, nivel bajo de tensión y no se afectaban con los eventos vitales. Las positivas características psicológicas y de resiliencia, unidas a un entorno psicosocial favorable, se relacionan con la larga supervivencia de los individuos estudiados.

  12. EL FENÓMENO SOCIO RELIGIOSO EN LAS TUNAS. EL PENTECOSTALISMO Y SU INFLUENCIA PARA UNA CONCEPCIÓN IDENTITARIA

    Directory of Open Access Journals (Sweden)

    Enrique Antonio Lalana Torres

    2015-01-01

    Full Text Available Resumen El pentecostalismo como componente del campo religioso del territorio de Victoria de Las Tunas, los aportes a la identidad cultural son los hilos conductores de este trabajo. Comprende además un análisis del proceso de asentamiento y desarrollo del mismo a partir del análisis de las fuentes históricas y socioculturales. Su génesis primaria responde a condicionantes propias de las transformaciones de Europa Occidental durante el siglo XVI y, consciente o no sus fundadores promulgaron las bases para el correlato religioso del nuevo orden socio económico que se gestaba: el capitalismo. Las implicaciones a la identidad cultural en las regiones donde se asentaron y desarrollaron este tipo de denominaciones generaron comportamientos interesantes que constituyen un importante objeto de estudio para su mejor comprensión. ABSTRACT Pentecostalism as a component of the religious field of the territory of Victoria de Las Tunas, contributions to cultural identity are the threads of this work. It includes an analysis of the process of settlement and development of the same from the analysis of historical and sociocultural sources. Its primary genesis responds to own conditions of transformations of Western Europe during the sixteenth century and, consciously or not its founders enacted the basis for the religious correlate the new socioeconomic order that was brewing: capitalism. The implications for cultural identity in the regions where they settled and developed this kind of names generated interesting behaviors that constitute an important object of study for better understanding.

  13. SEBARAN DAN HUBUNGAN PARAMETER REPRODUKSI IKAN TUNA MADIDIHANG (Thunnus albacares DENGAN SUHU DAN KLOROFIL-a DI LAUT BANDA

    Directory of Open Access Journals (Sweden)

    Karsono Wagiyo

    2015-12-01

    Full Text Available Laut Banda diketahui mempunyai kondisi lingkungan yangmendukung sebagai daerah pemijahan ikan tuna madidihang (Thunnus albacares. Sebaran parameter reproduksi dan hubungannya dengan lingkungan perlu diketahui sebagai dasar pengelolaan sumberdaya yang lestari. Penelitian dilakukan tahun 2011-2012 dengan basis pendataan di Bandaneira. Pengamatan parameter reproduksi dilakukan terhadap ikan sampel melalui observasi dan enumerasi. Suhu dan klorofil-a diperoleh = dari analisis citra satelit. Penelitian mendapatkan persentase gonad matang (100 % dan indeks kematangan gonad tertinggi (3,75 serta nisbah kelamin seimbang, secara temporal ditemukan pada bulan antara September-Desember, secara spasial ditemukan di Perairan Gunung Api dan Selatan Kepulauan Lease. Tingkat kematangan gonad dan indeks kematangan gonad meningkat terjadi pada saat suhu mulai menghangat dan klorofil-a mulai menurun. Tingkat kematangan gonad dan indeks kematangan gonad menurun terjadi pada saat awal penurunan suhu dan awal kenaikan klorofil-a. Besides known as the Banda Sea region yellowfin tuna migration (Thunnus albacares is also a spawning area. Distribution of Reproduction parameter and their relationship with environmental parameter should be known as the basis for sustainable resource management. The reproduction parameter obtaianed by observation and enumeration. Temperature and chlorophyll-a obtained by satellite image analysis. Research gets a high percentage of the gonads mature (100% and gonad maturity index (3,75 and a balanced sex ratio, temporally be found in the September-December, spatially found in the waters of Pulau Gunung Api and Lease Islands. The maturity level of gonads and gonadal maturation index increases occurred when the temperatures begin to warm and chlorophyll-a start to decline. The maturity level of gonads and gonadal maturation index decreases occurred at the beginning of the early drop in temperature and increase in chlorophyll-a.

  14. Assessing Anthropogenic Impacts on Tunas, Sharks and Billfishes with Direct Observations of Human Fishers on the High Seas

    Science.gov (United States)

    Block, B.; Ferretti, F.; White, T.; De Leo, G.; Hazen, E. L.; Bograd, S. J.

    2016-12-01

    Anthropogenic impacts on marine predators have been examined within exclusive economic zones, but few data sets have enabled assessing human fishing impacts on the high seas. By combining large electronic tagging databases archiving mobile predator movements (e.g. Tagging of Pacific Pelagics, TAG A Giant, Animal Telemetry Network) with the global fishing catch and fishing effort data, from satellite tracks of vessels on the high seas (AIS), a better understanding of human use and exploitation at a global scale can be obtained. This capacity to combine the movements of mobile ocean predators (tunas, sharks, billfishes) with analyses of their human predator's behaviors, via examination of the global fishing fleet activities is unprecedented due to the new access researchers are garnering to these big satellite derived AIS databases. Global Fishing Watch is one example of such a data provider, that now makes accessible, the AIS data from the global community of maritime vessels, and has developed along with researchers new algorithms that delineate distinct types of fishing vessel behaviors (longline, purse seiner) and effort. When combined with satellite tagging data of mobile apex predators, oceanographic preferences, records of fishing fleets catches, targeted species and economic drivers of fisheries, new quantitative insights can be gained about the catch reporting of fleets, and the pelagic species targeted at a global scale. Research communities can now also examine how humans behave on the high seas, and potentially improve how fish stocks, such as tunas, billfishes, and sharks are exploited. The capacity to gather information on diverse human fishing fleets and behaviors remotely, should provide a wealth of new tools that can potentially be applied toward the resource management efforts surrounding these global fishing fleets. This type of information is essential for prioritizing regions of conservation concern for megaufauna swimming in our oceans.

  15. COMPORTAMIENTO DE MORTALIDAD EN EL SERVICIO DE NEFROLOGÍA. AÑOS 2009-2010. LAS TUNAS.

    Directory of Open Access Journals (Sweden)

    Rodríguez López Jose Luis

    2011-01-01

    Full Text Available Introduction: One of the fundamental problems that the Nefrología faces in the current time is the growing number of patient with Inadequacy Renal Terminal Chronicle that you/they require substitute treatments of the renal function to survive. Objectives: To analyze the behavior of the mortality and the factors that influenced in the patients that were carried out treatment of chronic hemodiálisis during the years 2009-2010 in the service of Nefrología of the Hospital G. Doc "Dr. Ernesto Guevara of the Serna", Las Tunas City. Method: He/she was carried out a descriptive-retrospective study of traverse court 2 years old 2009-2010, in the service of Nefrología of the Hospital G. Doc. "Dr. Ernesto Guevara of the Serna" of The Tunas that it analyzed the mortality in patient with treatment of chronic hemodiálisis. The sample was constituted by 36 deceaseds. Results: The cause of Inadequacy Renal more frequent Terminal Chronicle was the Arterial Hypertension, most of the deceaseds had more than 65 years of age and a strong association existed among the beginning way, attention previous nefrológica, type of vascular access and time of permanency in hemodiálisis. The cardiovascular illnesses went those more associated to The Inadequacy Renal Chronicle and they constituted the main causes of death, followed by the sepsis. Most of the carried out autopsies had pathological clinical relationship. Conclusions: We recommend to increase the pesquizaje of patient with Inadequacy Renal Chronicle in the Primary Attention of Health for their precocious remission to the nefrólogo, it stops this way to slow their progression to the terminal phase and to achieve their best preparation for the treatment dialítico and the renal transplant, what will allow a better quality of life and a decrease of the mortality.

  16. Heavy metals in yellowfin tuna (Thunnus albacares) and common dolphinfish (Coryphaena hippurus) landed on the Ecuadorian coast

    Energy Technology Data Exchange (ETDEWEB)

    Araújo, Cristiano V.M., E-mail: cristiano.araujo@icman.csic.es [Central Department of Research (DCI), Ecuadorian Aquatic Ecotoxicology (ECUACTOX) group, Universidad Laica Eloy Alfaro de Manabí - ULEAM, Manta (Ecuador); Centre of Functional Ecology (CFE), Department of Life Sciences, University of Coimbra, Coimbra (Portugal); Cedeño-Macias, Luis A. [Central Department of Research (DCI), Ecuadorian Aquatic Ecotoxicology (ECUACTOX) group, Universidad Laica Eloy Alfaro de Manabí - ULEAM, Manta (Ecuador); Faculty of Marine Sciences, Universidad Laica Eloy Alfaro de Manabí (ULEAM), Manta (Ecuador)

    2016-01-15

    Heavy metals are contaminants of great environmental concern due to their multiple origins (natural and anthropogenic), the ability to accumulate in organs and tissues, and the deleterious effects they can cause in organisms. Studies on the accumulation of metals in seafood, such as fish, have increased in importance due to the risk for human health when consuming fish contaminated by metals. The present work was aimed at verifying the concentrations of cadmium (Cd), mercury (Hg) and lead (Pb) in the muscular tissue and liver of yellowfin tuna (Thunnus albacares) and common dolphinfish (Coryphaena hippurus) from the Eastern Pacific Ocean landed in Manta city, Ecuador. Samples were analyzed by inductively coupled plasma mass spectroscopy (ICP-MS). Around half of the muscle samples of both species presented levels of Cd and Hg above the limits considered safe for human consumption established by the European Union. For Pb, most of the muscle samples were considered acceptable for consumption. Results indicate that both species should be consumed with some caution. Considering the tolerable weekly intake recommended for adults by the World Health Organization, results indicate that Hg is the main metal that limits the consumption of yellowfin tuna and common dolphinfish, with a recommended maximum ingestion, respectively, of 191 and 178 g per week for an adult. - Highlights: • Thunnus albacares and Coryphaena hippurus from Eastern Pacific (Ecuador) were sampled. • Muscle and liver of both species were assessed for Cd, Hg and Pb concentrations. • Levels of Pb were considered acceptable for both species. • High levels of Cd and Hg in both species can be considered unsafe for human health. • For both species the recommended maximum ingestion is around 180 g week{sup −1} for an adult.

  17. Quality assessment of ice-stored tropical yellowfin tuna (Thunnus albacares) and influence of vacuum and modified atmosphere packaging.

    Science.gov (United States)

    Silbande, Adèle; Adenet, Sandra; Smith-Ravin, Juliette; Joffraud, Jean-Jacques; Rochefort, Katia; Leroi, Françoise

    2016-12-01

    Metagenomic, microbial, chemical and sensory analyses of Thunnus albacares from Martinique stored in ice (AIR - 0 °C), vacuum (VP - 4/8 °C) and modified atmosphere packaging (MAP - 4/8 °C) (70% CO2 - 30% O2) were carried out. The organoleptic rejection of AIR tuna was observed at day 13 when total bacterial counts equaled 10(6)-10(7) CFU g(-1). No extension of shelf-life was provided by VP and MAP. According to 16S rRNA gene sequence analyzed by Illumina MiSeq and PCR-TTGE, Rhodanobacter terrae was the main species of the freshly caught tuna. At the sensory rejection time, Brochothrix thermosphacta and Pseudomonas dominated the AIR products while B. thermosphacta alone or a mix of B. thermosphacta, Enterobacteriaceae and lactic acid bacteria (LAB) dominated the microbiota of MAP and VP products, respectively. The pH value remained stable in all trials, ranging from 5.77 to 5.97. Total volatile basic nitrogen (TVBN) and trimethylamine (TMA-N) concentrations were weak and not significantly different between batches. Lipid oxidation increased in the samples containing O2 (MAP > AIR). The initial concentration of histamine was high (75-78 mg kg(-1)) and stable up to 8 days but then significantly decreased in all trials to reach 25-30 mg kg(-1), probably due to the presence of histamine-decomposing bacteria. Copyright © 2016 Elsevier Ltd. All rights reserved.

  18. Physicochemical Characterization of Biofluid Metabolites from Liquid Residual of Tuna Fish (Euthynnus affinis throughout Refrigerated Storage Condition

    Directory of Open Access Journals (Sweden)

    Farah Faiqah Fazial

    2017-01-01

    Full Text Available The cold storage condition and use of chemical treatment to preserve the fish appearance sometimes cause difficulties to the consumers to estimate the freshness of fish in the market. However, during fish deterioration, some compound is released or formed due to microbial and biochemical process. Identification of released compound during fish spoilage is a crucial step in understanding the degree of spoilage. This study characterizes the physicochemical changes of metabolites biofluids from liquid residual of tuna fish (Euthynnus affinis during refrigerated storage condition. Tuna fish were kept in ice at 0°C and stored in cold room (~4°C for seven days in order to study the changes in fish freshness and loss of quality through the storage period. Liquid residual of fish was collected at 0, 1, 2, 3, 4, 5, 6, and 7 days of storage. LC-MS/MS analysis was carried out to determine the possible dominant compound which was later identified as creatine and phenylalanine. Quantification of creatine and phenylalanine using HPLC with UV detector found that creatine and phenylalanine increased significantly up to day 4 and day 5 upon storage time for creatine and phenylalanine, respectively (p<0.05. The liquid residual pH increased from 6.5 on day 0 to 7.5 on day 7 (p<0.05. Changes in chemical compounds were supported with physical analysis on gills colour of spoilage fish. L⁎ and a⁎ values decreased with storage time from 41.08 to 24.76 and 18.34 to 10.40, respectively, while b⁎ value increased from -3.80 to -0.46 (p<0.05. The finding of biofluid derived compounds was found as useful and alternative indicators of fish freshness in later study on the development of optical biosensor.

  19. Evolution of movement rate increases the effectiveness of marine reserves for the conservation of pelagic fishes.

    Science.gov (United States)

    Mee, Jonathan A; Otto, Sarah P; Pauly, Daniel

    2017-06-01

    Current debates about the efficacy of no-take marine reserves (MR) in protecting large pelagic fish such as tuna and sharks have usually not considered the evolutionary dimension of this issue, which emerges because the propensity to swim away from a given place, like any other biological trait, will probably vary in a heritable fashion among individuals. Here, based on spatially explicit simulations, we investigated whether selection to remain in MRs to avoid higher fishing mortality can lead to the evolution of more philopatric fish. Our simulations, which covered a range of life histories among tuna species (skipjack tuna vs. Atlantic bluefin tuna) and shark species (great white sharks vs. spiny dogfish), suggested that MRs were most effective at maintaining viable population sizes when movement distances were lowest. Decreased movement rate evolved following the establishment of marine reserves, and this evolution occurred more rapidly with higher fishing pressure. Evolutionary reductions in movement rate led to increases in within-reserve population sizes over the course of the 50 years following MR establishment, although this varied among life histories, with skipjack responding fastest and great white sharks slowest. Our results suggest the evolution of decreased movement can augment the efficacy of marine reserves, especially for species, such as skipjack tuna, with relatively short generation times. Even when movement rates did not evolve substantially over 50 years (e.g., given long generation times or little heritable variation), marine reserves were an effective tool for the conservation of fish populations when mean movement rates were low or MRs were large.

  20. Witches in the Atlantic World.

    Science.gov (United States)

    Breslaw, Elaine

    2003-01-01

    Presents a lesson plan that focuses on witchcraft in the Atlantic world. Describes each of the four sections of the lesson that encompasses learning about terms and religious views on witchcraft to the history of witchcraft in New England, in the United States, and the Salem (Massachusetts) witchcraft trials. (CMK)

  1. Initial interlaboratory validation of an analytical method for the determination of lead in canned tuna to be used for monitoring and regulatory purposes.

    Science.gov (United States)

    Santiago, E C; Bello, F B B

    2003-06-01

    The Association of Official Analytical Chemists (AOAC) Standard Method 972.23 (dry ashing and flame atomic absorption spectrophotometry (FAAS)), applied to the analysis of lead in tuna, was validated in three selected local laboratories to determine the acceptability of the method to both the Codex Alimentarius Commission (Codex) and the European Union (EU) Commission for monitoring lead in canned tuna. Initial validation showed that the standard AOAC method as performed in the three participating laboratories cannot satisfy the Codex/EU proposed criteria for the method detection limit for monitoring lead in fish at the present regulation level of 0.5 mg x kg(-1). Modification of the standard method by chelation/concentration of the digest solution before FAAS analysis showed that the modified method has the potential to meet Codex/EU criteria on sensitivity, accuracy and precision at the specified regulation level.

  2. Changes in energy intake and cost of transport by skipjack tuna (Katsuwonus pelamis) during northward migration in the northwestern Pacific Ocean

    Science.gov (United States)

    Aoki, Yoshinori; Kitagawa, Takashi; Kiyofuji, Hidetada; Okamoto, Suguru; Kawamura, Tomohiko

    2017-06-01

    Energy intake during the northward migration of tagged juvenile skipjack tuna (Katsuwonus pelamis) was estimated using the heat increment of feeding (HIF) determined through peritoneal cavity temperature data acquired with an archival tag. The effectiveness of this method was confirmed by feeding experiments, even in a species without visceral heat exchangers. Applying these experimental results to the data from tagged fish in the wild revealed that the estimated energy intake of skipjack tuna was, on average, 2.2 times greater in temperate waters than in subtropical waters. This difference was likely due to the differences in the food supply between habitats. In contrast, the estimated energy cost of their daily travel distance decreased with northward migration. This result suggests that skipjack spend less energy in acquiring prey in temperate than in subtropical waters since prey are available in higher densities, thereby providing excess energy for growth or lipid reserves.

  3. Determination of trans- and cis-urocanic acid in relation to histamine, putrescine, and cadaverine contents in tuna (Auxis Thazard) at different storage temperatures.

    Science.gov (United States)

    Zare, Davood; Muhammad, Kharidah; Bejo, Mohd Hair; Ghazali, H M

    2015-02-01

    Scombroid fish poisoning is usually associated with consumption of fish containing high levels of histamine. However, reports indicate that some cases have responded to antihistamine therapy while ingested histamine levels in these cases were low. Potentiation of histamine toxicity by some biogenic amines, and release of endogenous histamine by other compounds such as cis-urocanic acid (UCA) are some hypotheses that have been put forth to explain this anomaly. Very little is known about the effects of storage conditions on the production of both UCA isomers and biogenic amines in tuna. Thus, the production of trans- and cis-UCA, histamine, putrescine, and cadaverine in tuna during 15 d of storage at 0, 3, and 10 °C and 2 d storage at ambient temperature were monitored. The initial trans- and cis-UCA contents in fresh tuna were 2.90 and 1.47 mg/kg, respectively, whereas the levels of putrescine and cadaverine were less than 2 mg/kg, and histamine was not detected. The highest levels of trans- and cis-UCA were obtained during 15 d storage at 3 °C (23.74 and 21.79 mg/kg, respectively) while the highest concentrations of histamine (2796 mg/kg), putrescine (220.32 mg/kg) and cadaverine (1045.20 mg/kg) were obtained during storage at room temperature, 10 and 10 °C, respectively. Histamine content increased considerably during storage at 10 °C whereas trans- and cis-UCA contents changed slightly. The initial trans-UCA content decreased during storage at ambient temperature. Thus, unlike histamine, concentrations of trans- and cis-UCA did not result in elevated levels during storage of tuna. © 2015 Institute of Food Technologists®

  4. Sintesis Fosfolipid Mengandung Asam Lemak w-3 dari Fosfolipid Kedelai dan Minyak Kaya Asam Lemak w-3 dari Hasil Samping Pengalengan Tuna

    OpenAIRE

    Estiasih, Teti; Nur, Moch; Maligan, Jaya Mahar; Maulana, Satrio

    2013-01-01

    Synthesis of Phospholipid Containing w-3 Fatty Acids from Soy Phospholipidsand Fish Oil Enriched with w-3 Fatty Acids from Tuna Canning Processing Teti Estiasih, Moch. Nur, Jaya Mahar Maligan, Satrio Maulana ABSTRAK Keunggulan fosfolipid dapat ditingkatkan dengan menggabungkan asam lemak w-3, terutama EPA (eicosapentaenoicacid, C20:5w-3) dan DHA (docosahexaenoic acid, C22:6w-3), pada struktur fosfolipid sehingga diperoleh fosfolipidterstruktur. Strukturisasi fosfolipid kedelai kom...

  5. The large-scale deployment of fish aggregation devices alters environmentally-based migratory behavior of skipjack tuna in the Western Pacific Ocean.

    Directory of Open Access Journals (Sweden)

    Xuefang Wang

    Full Text Available Fish aggregation devices (FADs have been used extensively in the tuna purse seine fishery since the 1980s. This long-term modification of natural habitat has generated discussions as to whether FADs impact movement patterns of tuna species. We examined this question using data collected from the skipjack tuna (Katsuwonus pelamis fishery. We used the longitudinal gravitational center of catch (G to examine temporal variability in skipjack movement in the Western and Central Pacific Ocean, and related this to El Niño Southern Oscillation (ENSO events. We found that in most cases G for free-swimming school sets changed with the onset of ENSO events, while G for floating-object-associated school sets remained relatively constant. This suggests that skipjack exhibit distinguishable behavioral strategies in response to ENSO events: they either react by moving long distances or they associate with floating objects. There has been no previous attempt to evaluate the interaction between FADs and the environmentally-determined movement of skipjack; this study shows evidence of an interaction, which should be considered when managing skipjack populations.

  6. Influence of carbon monoxide on the colour stability of defrosted yellowfin tuna (Thunnus albacares) muscle stored under aerobic and anaerobic conditions.

    Science.gov (United States)

    Neethling, Nikki E; Hoffman, Louwrens C; Britz, Trevor J; O'Neill, Bernadette

    2015-06-01

    The use of carbon monoxide (CO) and various packaging types has been suggested to improve/stabilise the colour and oxidative processes of red meats, thereby improving the retail value and revenue. The main aim of this study was to investigate the influence of packaging type and CO treatment on the colour and oxidative stability of tuna. The addition of CO significantly increased the redness (a(*) ) of the tuna steaks but the redness was not equally stable for all treatments. The aerobically packaged steaks showed a temporal decrease in redness while the redness of anaerobically packaged steaks remained relatively stable. The addition of CO did not significantly affect (P >0.05) the brownness (b(*) ) (with one exception) and lightness (L(*) ) of the steaks. The anaerobically packaged steaks showed a significant difference (P 0.05) in lipid or protein oxidation were observed between treatments. The aerobically packaged steaks had a significant temporal increase (P colour stability of tuna. Such treatment can reduce spoilage and wastage thereby potentially increasing revenue. © 2014 Society of Chemical Industry.

  7. Dietary Tuna Dark Muscle Protein Attenuates Hepatic Steatosis and Increases Serum High-Density Lipoprotein Cholesterol in Obese Type-2 Diabetic/Obese KK-Ay Mice.

    Science.gov (United States)

    Maeda, Hayato; Hosomi, Ryota; Fukuda, Mari; Ikeda, Yuki; Yoshida, Munehiro; Fukunaga, Kenji

    2017-05-01

    Tuna muscle consists of light and dark muscle in approximately equal proportions. However, besides for the light muscle of tuna, cod, sardine, and salmon, few researches have assessed the health-promoting functions of fish protein. Therefore, we evaluated the mechanisms underlying the alteration of lipid storage and cholesterol metabolism following the intake of tuna dark muscle protein (TDMP) by obese type-2 diabetic/obese mice. Four-week-old male KK-Ay mice were separated into 2 dietary groups, with one group receiving a casein-based diet and the other receiving a diet with the substitution of part of the protein (50%, w/w) by TDMP (TDMP diet) for 4 wk. The TDMP diet significantly increased the content of serum high-density lipoprotein cholesterol, partly due to the reduction of the expression of scavenger receptor class B member 1 in epididymal white adipose tissue. In addition, dietary TDMP decreased the content of hepatic triacylglycerol, which could be due to the enhancement of carnitine palmitoyltransferase-2 activity through the activation of the expression of the peroxisome proliferative activated receptor-α in the liver. These results suggest that TDMP could have the potential to prevent the development of obesity-related diseases by suppressing the storage of hepatic triacylglycerol and cholesterol. © 2017 Institute of Food Technologists®.

  8. The role of Atlantic overturning circulation in the recent decline of Atlantic major hurricane frequency.

    Science.gov (United States)

    Yan, Xiaoqin; Zhang, Rong; Knutson, Thomas R

    2017-11-22

    Observed Atlantic major hurricane frequency has exhibited pronounced multidecadal variability since the 1940s. However, the cause of this variability is debated. Using observations and a coupled earth system model (GFDL-ESM2G), here we show that the decline of the Atlantic major hurricane frequency during 2005-2015 is associated with a weakening of the Atlantic Meridional Overturning Circulation (AMOC) inferred from ocean observations. Directly observed North Atlantic sulfate aerosol optical depth has not increased (but shows a modest decline) over this period, suggesting the decline of the Atlantic major hurricane frequency during 2005-2015 is not likely due to recent changes in anthropogenic sulfate aerosols. Instead, we find coherent multidecadal variations involving the inferred AMOC and Atlantic major hurricane frequency, along with indices of Atlantic Multidecadal Variability and inverted vertical wind shear. Our results provide evidence for an important role of the AMOC in the recent decline of Atlantic major hurricane frequency.

  9. Governing large-scale social-ecological systems: Lessons from five cases

    Directory of Open Access Journals (Sweden)

    Forrest D Fleischman

    2014-08-01

    Full Text Available This paper compares lessons drawn from five case studies of large scale governance of common-pool resources: management of forests in Indonesia, the Great Barrier Reef in Australia, the Rhine River in western Europe, the Ozone layer (i.e. the Montreal Protocol, and the Atlantic Bluefin Tuna (i.e. the International Convention on the Conservation of Atlantic Tuna. The goal is to assess the applicability of Ostrom’s design principles for sustainable resource governance to large scale systems, as well as to examine other important variables that may determine success in large scale systems. While we find support for some of Ostrom’s design principles (boundaries, monitoring, sanctions, fit to conditions, and conflict resolution mechanisms are all supported, other principles have only moderate to weak support. In particular, recognition of rights to organize and the accountability of monitors to resource users were not supported. We argue that these differences are the result of differences between small and large scale systems. At large scales, other kinds of political dynamics, including the role of scientists and civil society organizations, appear to play key roles. Other variables emphasized in common-pool resource studies, such as levels of dependence on resources, group size, heterogeneity, disturbances, and resource characteristics also receive mixed support, pointing to the need to reinterpret the meaning of common-pool resource theories in order for them to be applicable at larger scales.

  10. The role of Atlantic overturning circulation in the recent decline of Atlantic major hurricane frequency

    OpenAIRE

    Yan, Xiaoqin; Zhang, Rong; Knutson, Thomas R.

    2017-01-01

    Observed Atlantic major hurricane frequency has exhibited pronounced multidecadal variability since the 1940s. However, the cause of this variability is debated. Using observations and a coupled earth system model (GFDL-ESM2G), here we show that the decline of the Atlantic major hurricane frequency during 2005–2015 is associated with a weakening of the Atlantic Meridional Overturning Circulation (AMOC) inferred from ocean observations. Directly observed North Atlantic sulfate aerosol optical ...

  11. CONTRIBUTE TO THE CULTURAL DEVELOPMENT OF LAS TUNAS CITY OF DIOSCÓRIDE T. FUERTE BORGES / APORTES AL DESARROLLO CULTURAL DE LAS TUNAS DE DIOSCÓRIDE T. BORGES FUERTE

    Directory of Open Access Journals (Sweden)

    Katia Susana Hernández Moreno

    2012-09-01

    Full Text Available In this investigation it was carried out a valuation of the elements that distinguish the cultural work of Dioscóride T. Borges Fuerte and their contributions to the cultural development of Las Tunas, through the significance of their cultural chore, to become an artisan Luthiers of great relevance. It is sought to achieve the recognition of a personality of the culture, illustrating in the document that contains their history of life their contributions and taxes from the luthiería to the cultural development of the county. In the investigation it was made use of the History of Life like qualitative method to achieve an approach to Borges' life and to reveal their contributions to the cultural development through their contribution to the music, the construction of guitars, formation of new generations and innovation in the luthiería. The reach and transcendency of the work of the eminent Luthiers stands out among musicians, professors, students, personalities of the culture and manufacturers of guitars in the whole country.

  12. 50 CFR 635.29 - Transfer at sea.

    Science.gov (United States)

    2010-10-01

    ... tuna, blue marlin, white marlin, or swordfish at sea in the Atlantic Ocean, regardless of where the... not transfer an Atlantic tuna, blue marlin, white marlin, roundscale spearfish, or swordfish at sea in...

  13. 76 FR 45781 - Atlantic Highly Migratory Species; Meeting of the Atlantic Highly Migratory Species Advisory Panel

    Science.gov (United States)

    2011-08-01

    ... National Oceanic and Atmospheric Administration RIN 0648-XA573 Atlantic Highly Migratory Species; Meeting of the Atlantic Highly Migratory Species Advisory Panel AGENCY: National Marine Fisheries Service... meeting. SUMMARY: NMFS will hold a 3-day Atlantic Highly Migratory Species (HMS) Advisory Panel (AP...

  14. 75 FR 44938 - Atlantic Coastal Fisheries Cooperative Management Act Provisions; Atlantic Coastal Shark Fishery

    Science.gov (United States)

    2010-07-30

    ... 0648-XX28 Atlantic Coastal Fisheries Cooperative Management Act Provisions; Atlantic Coastal Shark... cancellation of the Federal moratorium on fishing for Atlantic coastal sharks in the State waters of New Jersey... Sharks (Coastal Shark Plan). DATES: Effective July 30, 2010. ADDRESSES: Emily Menashes, Acting Director...

  15. 76 FR 57709 - Atlantic Highly Migratory Species; Atlantic Shark Management Measures

    Science.gov (United States)

    2011-09-16

    ... Species; Atlantic Shark Management Measures AGENCY: National Marine Fisheries Service (NMFS), National... Atlantic shark landings; request for comments. SUMMARY: This notice announces the National Marine Fisheries... Atlantic shark fisheries. NMFS published an Advanced Notice of Proposed Rulemaking (ANPR) on September 20...

  16. 76 FR 67121 - Atlantic Highly Migratory Species; 2012 Atlantic Shark Commercial Fishing Season

    Science.gov (United States)

    2011-10-31

    ... Species; 2012 Atlantic Shark Commercial Fishing Season AGENCY: National Marine Fisheries Service (NMFS... season for the Atlantic commercial shark fisheries. Quotas would be adjusted based on any over- and/or underharvests experienced during the 2010 and 2011 Atlantic commercial shark fishing seasons. In addition, NMFS...

  17. 77 FR 61562 - Atlantic Highly Migratory Species; 2013 Atlantic Shark Commercial Fishing Season

    Science.gov (United States)

    2012-10-10

    ... Species; 2013 Atlantic Shark Commercial Fishing Season AGENCY: National Marine Fisheries Service (NMFS... season for the Atlantic commercial shark fisheries. Quotas would be adjusted as allowable based on any over- and/or underharvests experienced during the 2011 and 2012 Atlantic commercial shark fishing...

  18. Caracterización de los pacientes con cirrosis hepática atendidos en Las Tunas

    Directory of Open Access Journals (Sweden)

    Alina Torreblanca Xiques

    2014-11-01

    Full Text Available Se realizó un estudio observacional descriptivo, con el objetivo de caracterizar los pacientes con cirrosis hepática (CH, atendidos en el servicio de gastroenterología del Hospital General Docente “Dr. Ernesto Guevara de la Serna”, Las Tunas, Cuba, en el período comprendido entre febrero de 2012 y febrero de 2014. Se estudiaron 55 pacientes con cirrosis hepática diagnosticada por laparoscopia. Predominaron los pacientes del grupo de edad entre 50 y 59 años, siendo el sexo masculino el más afectado. Las principales manifestaciones clínicas que se apreciaron en estos pacientes fueron la ascitis y los edemas en miembros inferiores, así como las complicaciones más frecuentemente encontradas, la ascitis y la hemorragia digestiva alta. El alcoholismo y la etiología viral por virus C se presentaron con mayor frecuencia, predominando el primero. En el mayor por ciento de los pacientes debutó la enfermedad con al menos una complicación

  19. Spatial Patterns and Temperature Predictions of Tuna Fatty Acids: Tracing Essential Nutrients and Changes in Primary Producers.

    Science.gov (United States)

    Pethybridge, Heidi R; Parrish, Christopher C; Morrongiello, John; Young, Jock W; Farley, Jessica H; Gunasekera, Rasanthi M; Nichols, Peter D

    2015-01-01

    Fatty acids are among the least understood nutrients in marine environments, despite their profile as key energy components of food webs and that they are essential to all life forms. Presented here is a novel approach to predict the spatial-temporal distributions of fatty acids in marine resources using generalized additive mixed models. Fatty acid tracers (FAT) of key primary producers, nutritional condition indices and concentrations of two essential long-chain (≥C20) omega-3 fatty acids (EFA) measured in muscle of albacore tuna, Thunnus alalunga, sampled in the south-west Pacific Ocean were response variables. Predictive variables were: location, time, sea surface temperature (SST) and chlorophyll-a (Chla), and phytoplankton biomass at time of catch and curved fork length. The best model fit for all fatty acid parameters included fish length and SST. The first oceanographic contour maps of EFA and FAT (FATscapes) were produced and demonstrated clear geographical gradients in the study region. Predicted changes in all fatty acid parameters reflected shifts in the size-structure of dominant primary producers. Model projections show that the supply and availability of EFA are likely to be negatively affected by increases in SST especially in temperate waters where a 12% reduction in both total fatty acid content and EFA proportions are predicted. Such changes will have large implications for the availability of energy and associated health benefits to high-order consumers. Results convey new concerns on impacts of projected climate change on fish-derived EFA in marine systems.

  20. Standardization of a geo-referenced fishing data set for the Indian Ocean bigeye tuna, Thunnus obesus (1952-2014)

    Science.gov (United States)

    Wibawa, Teja A.; Lehodey, Patrick; Senina, Inna

    2017-02-01

    Geo-referenced catch and fishing effort data of the bigeye tuna fisheries in the Indian Ocean over 1952-2014 were analyzed and standardized to facilitate population dynamics modeling studies. During this 62-year historical period of exploitation, many changes occurred both in the fishing techniques and the monitoring of activity. This study includes a series of processing steps used for standardization of spatial resolution, conversion and standardization of catch and effort units, raising of geo-referenced catch into nominal catch level, screening and correction of outliers, and detection of major catchability changes over long time series of fishing data, i.e., the Japanese longline fleet operating in the tropical Indian Ocean. A total of 30 fisheries were finally determined from longline, purse seine and other-gears data sets, from which 10 longline and 4 purse seine fisheries represented 96 % of the whole historical geo-referenced catch. Nevertheless, one-third of total nominal catch is still not included due to a total lack of geo-referenced information and would need to be processed separately, accordingly to the requirements of the study. The geo-referenced records of catch, fishing effort and associated length frequency samples of all fisheries are available at org/10.1594/PANGAEA.864154" target="_blank">doi:10.1594/PANGAEA.864154.

  1. Use of a counterfactual approach to evaluate the effect of area closures on fishing location in a tropical tuna fishery.

    Directory of Open Access Journals (Sweden)

    Tim K Davies

    Full Text Available Spatial closures are widely used in marine conservation and fisheries management and it is important to understand their contribution to achieving management objectives. Many previous evaluations of closed area effects have used before-after comparisons, which, without controlling for a full range of factors, cannot ascribe changes in fleet behaviour to area closures per se. In this study we used a counterfactual approach to disentangle the effect of two closed areas on fishing location from other competing effects on the behaviour of the Indian Ocean tuna purse seine fishery. Our results revealed an inconsistent effect of the one of the closed areas between years, after taking into account the influence of environmental conditions on fleet behaviour. This suggests that the policy of closing the area per se was not the main driver for the fleet allocating its effort elsewhere. We also showed a marked difference in effect between the two closed areas resulting from their different locations in the fishery area. These findings highlight the need to account for other key fleet behavioural drivers when predicting or evaluating the contribution of area closures to achieving conservation and fishery management objectives.

  2. Complex coacervation with whey protein isolate and gum arabic for the microencapsulation of omega-3 rich tuna oil.

    Science.gov (United States)

    Eratte, Divya; Wang, Bo; Dowling, Kim; Barrow, Colin J; Adhikari, Benu P

    2014-11-01

    Tuna oil rich in omega-3 fatty acids was microencapsulated in whey protein isolate (WPI)-gum arabic (GA) complex coacervates, and subsequently dried using spray and freeze drying to produce solid microcapsules. The oxidative stability, oil microencapsulation efficiency, surface oil and morphology of these solid microcapsules were determined. The complex coacervation process between WPI and GA was optimised in terms of pH, and WPI-to-GA ratio, using zeta potential, turbidity, and morphology of the microcapsules. The optimum pH and WPI-to-GA ratio for complex coacervation was found to be 3.75 and 3 : 1, respectively. The spray dried solid microcapsules had better stability against oxidation, higher oil microencapsulation efficiency and lower surface oil content compared to the freeze dried microcapsules. The surface of the spray dried microcapsules did not show microscopic pores while the surface of the freeze dried microcapsules was more porous. This study suggests that solid microcapsules of omega-3 rich oils can be produced using WPI-GA complex coacervates followed by spray drying and these microcapsules can be quite stable against oxidation. These microcapsules can have many potential applications in the functional food and nutraceuticals industry.

  3. In vitro calcium availability in bakery products fortified with tuna bone powder as a natural calcium source.

    Science.gov (United States)

    Nemati, Mahnaz; Kamilah, Hanisah; Huda, Nurul; Ariffin, Fazilah

    2015-08-01

    Avoidance of dairy products due to lactose intolerance can lead to insufficiency of calcium (Ca) in the body. In an approach to address this problem, tuna bone powder (TBP) was formulated as a calcium supplement to fortify bakery products. In a study, TBP recovered by alkaline treatment contained 38.16 g/100 g of calcium and 23.31 g/100 g of phosphorus. The ratio of Ca:P that was close to 2:1 was hence comparable to that in human bones. The availability of calcium in TBP was 53.93%, which was significantly higher than most calcium salts, tricalcium phosphate (TCP) being the exception. In vitro availability of calcium in TBP-fortified cookies or TCP-fortified cookies were comparable at 38.9% and 39.5%, respectively. These values were higher than the readings from TBP-fortified bread (36.7%) or TCP-fortified bread (37.4%). Sensory evaluation of bakery products containing TBP or TCP elicited comparable scores for the two additives from test panels. Hence, TBP could be used in the production of high calcium bakery products that would enjoy consumer acceptance.

  4. Efectividad de la acupuntura en el tratamiento del síndrome del túnel del carpo, Las Tunas

    Directory of Open Access Journals (Sweden)

    Aydelián Jevey González

    2014-08-01

    Full Text Available Se realizó un estudio de intervención con el objetivo de determinar la efectividad de la acupuntura en el tratamiento del Síndrome del Túnel del Carpo, en pacientes que fueron atendidos en el Policlínico Docente Manuel Piti Fajardo del municipio de Las Tunas, en el período comprendido desde enero hasta diciembre de 2008. La muestra la conformaron 50 pacientes mayores de 14 años. Se les aplicó un tratamiento con acupuntura diario en un total de quince sesiones, utilizando los puntos: IG-4, IG-11, ID-3, P-7 y TR-5, conjuntamente con la terapia medicamentosa. Los resultados fueron satisfactorios, la casi totalidad de los pacientes (49 tuvo una evolución clínica positiva, al disminuir los síntomas y signos. Las recaídas fueron mínimas luego de treinta días de aplicado el tratamiento, el consumo de medicamentos disminuyó de forma discreta y los efectos adversos al tratamiento acupuntural fueron mínimos. El tratamiento fue efectivo

  5. Synthesis of chitosan based magnetic molecularly imprinted polymers for selective separation and spectrophotometric determination of histamine in tuna fish.

    Science.gov (United States)

    Hashemi, Mahdi; Nazari, Zahra; Noshirvani, Nooshin

    2017-12-01

    A novel chitosan molecularly imprinted polymers (CHI/MIPs) coated on Fe3O4 magnetic nanoparticles (MNPs) for selective solid phase extraction (SPE) of histamine (His) was synthesized by cross-linking of CHI with (3-Glycidyloxypropyl) trimethoxysilane (GPTMS) in the presence of His as the template molecule, and GPTMS/MNPS. Synthesized sorbent was characterized by scanning electron microscopy, X-ray diffraction, FT-IR and via adsorption kinetics and adsorption isotherms. The application of this sorbent was investigated in preconcentration and spectrophotometric determination of His by charge transfer complexation. The method is based on the adsorption of His on CHI/MMIPs and subsequent reaction of desorbed His with 2,3-Dichloro 5,6-dicyano-p-benzoquinone (DDQ) reagent for final spectrophotometric detection. The experimental parameters affecting separation efficiency and spectrophotometric determination were optimized. Under optimum conditions and at an analytical wavelength of 468nm, the calibration plot is linear in the 5.0-160.0ngmL-1 concentration range, and the limit of detection (estimated at S/N=3) is 1.5ngmL-1. The intra-day and inter-day precisions are in the range from 2.9 to 4.1%. The method was successfully applied for determination of His in spiked tuna fish samples where it gave recoveries ranging from 94.3 to 107.0%. Copyright © 2017 Elsevier Ltd. All rights reserved.

  6. Strategy for Preservation of Ptolemaic Wrapped Mummy’s Linen in Tuna el -Gebel Excavation, Egypt: A Case Study

    Directory of Open Access Journals (Sweden)

    Harby E. AHMED

    2011-09-01

    Full Text Available This research shows the practical strategies which were chosen for maintenance and conservation of textiles discovered in Tuna el -Gebel excavations, Egypt. This process represents the first aid to these objects, hidden in tombs over thousands of years. Thus, the operations carried out are very important in detecting the state of conservation of these remains of human activity. They also aimed at reducing the damage caused by storage conditions through thousands of years. The challenge that conservators of historic textiles face in this case is the decrease of the available and necessary possibilities for conducting the process of restoration in the best way. On the other hand, leaving these textiles without a conservation process may double the causes of damage in the textiles leading eventually to their complete loss.. The process of restoration has been recorded step by step, from the historical records of textiles to the cleaning processes. Moreover, the choice of a new holder for displaying textile pieces in museum and their placement in it are discussed.

  7. Reproductive aspects of the oceanic whitetip shark, Carcharhinus longimanus (Elasmobranchii: Carcharhinidae, in the equatorial and southwestern Atlantic Ocean

    Directory of Open Access Journals (Sweden)

    Mirna Regina dos Santos Tambourgi

    2013-06-01

    Full Text Available The present study sought to study the reproductive biology of the oceanic whitetip shark, Carcharhinus longimanus, in the equatorial and southwestern Atlantic Ocean. A total of 234 specimens were collected as bycatch during pelagic longline fisheries targeting tunas and swordfish, between December 2003 and December 2010. The fishing area was located between latitudes 10N and 35S and longitudes 3E and 40W. Of the 234 individuals sampled, 118 were females (with sizes ranging from 81 to 227 cm TL, total length and 116 males (ranging from 80 to 242 cm TL. The reproductive stages of the females were classed as immature, mature, preovulatory and pregnant, while males were divided into immature, maturing and mature. The size at maturity for females was estimated at 170.0 cm TL, while that for males was between 170.0 and 190.0 cm TL. Ovarian fecundity ranged from 1 to 10 follicles and uterine fecundity from 1 to 10 embryos. The reproductive cycle of this species is most likely biennial, with parturition occurring once every two years.

  8. Teaching Atlantic Studies in American High Schools.

    Science.gov (United States)

    Foster, Charles R.

    1980-01-01

    Stresses the importance of Atlantic studies within the framework of United States history, European history, and the contemporary world scene. Ways of integrating Atlantic studies into the high school social studies curriculum are suggested. Topics discussed include objectives, audiovisual aids, supplementary reading material, and global political…

  9. The Red Atlantic: Transoceanic Cultural Exchanges

    Science.gov (United States)

    Weaver, Jace

    2011-01-01

    The development of David Armitage's "white Atlantic" history parallels the Cold War origins of American studies with its mission to define and promote "American culture" or "American civilization." British scholar Paul Gilroy's "The Black Atlantic" served as a necessary corrective. Armitage's statement leads…

  10. Evaluación de los componentes de la biodiversidad en la finca agroecológica "Las Palmitas" del municipio Las Tunas Evaluation of the biodiversity components in the agroecological farm "Las Palmitas", Las Tunas municipality

    Directory of Open Access Journals (Sweden)

    Yamilka Salmón

    2012-09-01

    Full Text Available El objetivo del trabajo fue evaluar los componentes de la biodiversidad funcional y su contribución a la productividad y la eficiencia de la producción en la finca "Las Palmitas" (en la provincia Las Tunas, Cuba. Esta tiene un área de 15,44 ha y se dedica a la producción diversificada de cultivos, frutales y animales. Se realizó una caracterización agroecológica y se evaluó la funcionalidad de la biodiversidad, a partir del diseño de un modelo de análisis como guía de la investigación que incluyó los componentes: diversidad de árboles, diversidad de la producción y riqueza de especies. A través del diagnóstico se cuantificó el número de individuos de cada especie agrícola y pecuaria, y se caracterizaron de acuerdo con su funcionalidad dentro del sistema agroproductivo. Las fuentes de información primaria fueron la observación directa, las entrevistas informales y la aplicación de una encuesta semiestructurada, que incluyó las variables de interés para el diagnóstico. Se calcularon los índices de Shannon (2,8 y Margalef (5,70, los que permitieron visualizar la contribución de la diversidad al incremento de la productividad. Los indicadores de diversidad del agroecosistema alcanzaron valores óptimos para los sistemas diversificados, los cuales contribuyeron a la autosufiencia alimentaria, la eficiencia y la productividad. Los resultados indican una relevancia económica y social, que le confiere sostenibilidad y resiliencia al sistema agroecológico evaluado, por lo que constituye un modelo para su diseminación en condiciones locales o similares a las de este estudio.The objective of the work was to evaluate the components of functional biodiversity and their contribution to the productivity and efficiency of production in the farm "Las Palmitas" (Las Tunas province, Cuba. It has an area of 15,44 ha and it is dedicated to diversified crop, fruit and animal production. An agroecological characterization was made and

  11. The Atlantic diet – Origin and features

    Directory of Open Access Journals (Sweden)

    Manuela L. Vaz-Velho

    2016-04-01

    Full Text Available Despite globalization there still are food patterns which are clearly differentiated from one region to another in Europe and elsewhere.  In this study the Atlantic Diet is considered as thetraditional diet in Portugal and Galicia, a regionin northwest Spain.This paper aims to contribute to a better understanding of the Atlantic Diet food pattern in order to fully exploit the potential of this Atlantic gastronomical heritage.The background of the Atlantic Diet concept, the characterization of Atlantic Diet foods and a compilation of scientific findings related to the consumption of these foods are covered.A brief description of the Mediterranean Diet, the primitive pattern and the updated Mediterranean pyramid are also included in order to aid understanding of the globalization of this previously local health food pattern.Final remarks and suggestions for further studies are made.

  12. El papel de la universidad publica en la solución a problemáticas locales: experiencia con productores de nopal y tuna en la Junta Auxiliar de San Sebastián Villanueva, Puebla, México

    OpenAIRE

    Sánchez Espíndola, Adriana.; Bernal Mendoza, Héctor

    2015-01-01

    Partiendo de un diagnóstico con enfoque territorial, se identificó la problemática que condicionan la producción de nopal y tuna (Opuntia Ficus-indica (L.) Mill) de los productores de la “Agrointegradora de nopal y tuna S.A. de C.V.” aplicando técnicas participativas. Se determinaron dos problemáticas regionales: 1) Empleo indiscriminado e inadecuado de plaguicidas, con posible aparición de plagas nuevas y generación de resistencia y las consecuentes pérdidas económicas, y 2) Uso exclusivo de...

  13. Estudio bioecológico y de control del Trips Neohydatothrips opuntiae (Hood) que daña al nopal tuna en la región del Valle de Teotihuacán, Estado de México.

    OpenAIRE

    Hernández Navarro, Angélica

    2014-01-01

    Los Thysanoptera: Thripidae son considerados la principal causa de la baja productividad en el cultivo del nopal -tuna (Opuntia ficus indica) en la región del Valle de Teotihuacán, Estado de México. El objetivo de este estudio fue identificar las especies de thripidae presentes en el cultivo. Este trabajo de campo se realizó en dos huertos de nopal - tuna de la variedad Alfajayucan, uno en San Martín de las Pirámides y el otro en Nopaltepec, mediante 12 recolectas realizadas cada quince día...

  14. Benitez Bustamante, Carmen MatildeEstudio de factibilidad para la creación de una empresa dedicada a la producción y comercialización de mermelada y jugo de tuna para el mercado exterior.

    OpenAIRE

    Benitez Bustamante, Carmen Matilde

    2010-01-01

    El presente proyecto consiste en la realización de un estudio de prefactibilidad para verificar la viabilidad de la creación de una empresa dedicada a la producción y comercialización de mermelada y jugo de tuna para el mercado exterior. Se desarrollaron los estudios de mercado, técnico, organizacional y financiero. La empresa llevará el nombre de ECUATUNA Cía. Ltda., y producirá mermelada y jugo de tuna; cuyos nombres comunes serán: cactus jam y juice jam, respectivamente. Y el nombre com...

  15. Influence of Amino Acid Compositions and Peptide Profiles on Antioxidant Capacities of Two Protein Hydrolysates from Skipjack Tuna (Katsuwonus pelamis Dark Muscle

    Directory of Open Access Journals (Sweden)

    Chang-Feng Chi

    2015-04-01

    Full Text Available Influence of amino acid compositions and peptide profiles on antioxidant capacities of two protein hydrolysates from skipjack tuna (Katsuwonus pelamis dark muscle was investigated. Dark muscles from skipjack tuna were hydrolyzed using five separate proteases, including pepsin, trypsin, Neutrase, papain and Alcalase. Two hydrolysates, ATH and NTH, prepared using Alcalase and Neutrase, respectively, showed the strongest antioxidant capacities and were further fractionated using ultrafiltration and gel filtration chromatography. Two fractions, Fr.A3 and Fr.B2, isolated from ATH and NTH, respectively, showed strong radical scavenging activities toward 2,2-diphenyl-1-picrylhydrazyl radicals (EC50 1.08% ± 0.08% and 0.98% ± 0.07%, hydroxyl radicals (EC50 0.22% ± 0.03% and 0.48% ± 0.05%, and superoxide anion radicals (EC50 1.31% ± 0.11% and 1.56% ± 1.03% and effectively inhibited lipid peroxidation. Eighteen peptides from Fr.A3 and 13 peptides from Fr.B2 were isolated by reversed-phase high performance liquid chromatography, and their amino acid sequences were determined. The elevated antioxidant activity of Fr.A3 might be due to its high content of hydrophobic and aromatic amino acid residues (181.1 and 469.9 residues/1000 residues, respectively, small molecular sizes (3–6 peptides, low molecular weights (524.78 kDa, and amino acid sequences (antioxidant score 6.11. This study confirmed that a smaller molecular size, the presence of hydrophobic and aromatic amino acid residues, and the amino acid sequences were the key factors that determined the antioxidant activities of the proteins, hydrolysates and peptides. The results also demonstrated that the derived hydrolysates and fractions from skipjack tuna (K. pelamis dark muscles could prevent oxidative reactions and might be useful for food preservation and medicinal purposes.

  16. Using stable isotopes of albacore tuna and predictive models to characterize bioregions and examine ecological change in the SW Pacific Ocean

    Science.gov (United States)

    Pethybridge, Heidi R.; Young, Jock W.; Kuhnert, Petra M.; Farley, Jessica H.

    2015-05-01

    Broad-scale food web inferences of 534 albacore tuna, Thunnus alalunga, in the south-west Pacific Ocean in 2009 and 2010 were made using bulk nitrogen (δ15N) and carbon (δ13C) stable isotopes. Condition was also examined for the same fish using C:N ratios. A Generalized Additive Modeling (GAM) approach was used to analyze spatio-temporal, biological and environmental drivers that impact the distribution of tuna isotopes and to create oceanographic maps. Based on model formulations, five bioregions with distinct isotopic signatures were identified and were related to known biological, nutrient cycling and oceanographic (temperature, primary productivity and eddy) features associated with the East Australian Current. δ15N values showed a large-scale, uniform latitudinal gradient decreasing from the south to north, in a region encompassing oligotrophic waters in the Coral Sea. In contrast, δ13C values were lower in the nutrient rich Tasman Sea waters and offshore East Australia. C:N ratios suggested that albacore occupying southern and offshore waters were in better condition. Ontogenetic trends in all three biochemical parameters were identified and related to differences in size distribution. Regional-specific temporal variations were detected including similar monthly changes for both isotopes and significantly less enriched δ13C (by 1.9‰) than in previous work undertaken in 2006, potentially signifying a substantial shift in the carbon cycle that supports food webs off central east Australia. Our results showed that isotopic measurements in tuna and the GAM framework provide powerful tools to assess ecosystem functioning and change by linking sources of nutrients and organic matter to local food web assembly. Such knowledge is vital to support an ecosystem based approach to fisheries management including biogeochemical whole-of-ecosystem models and monitoring programs at regional and landscape-scales.

  17. Aspectos clínicos endoscópicos, relacionados con la diverticulosis de colon. Las Tunas, enero 2011 – diciembre 2012

    OpenAIRE

    Liem Fonseca Chong

    2015-01-01

    Se realizó un estudio descriptivo de series de casos, en el Hospital “Dr. Ernesto Guevara de la Serna” de Las Tunas, con el objetivo de caracterizar los aspectos clínicos endoscópicos de la diverticulosis del colon, en el periodo comprendido desde enero 2011 a diciembre 2012. El universo quedó constituido por todos los pacientes a los que se les realizó colonoscopia, y la muestra por todos los pacientes con diagnóstico endoscópico de enfermedad diverticular. Para la obtención de los datos pri...

  18. Non-invasive determination of the CO contents in tuna fish using polarization resolved resonance Raman scattering and/or Rayleigh spectroscopy

    DEFF Research Database (Denmark)

    Hassing, Søren

    Carbon monoxide (CO) is used for Modified Atmosphere Packaging of fresh fish and meat. CO is added because it binds to the Myoglobin of the muscle tissue with high affinity resulting in a bright, cherry-red colored carboxy-Myoglobin complex. The product will because of the red color appear...... with polarization resolved resonance Raman spectra of these molecules, can form the basis of the development of a fast and non-invasive method for the screening of the presence of CO in tuna fish and meat....

  19. Genetic variation in skipjack tuna Katsuwonus pelamis (L.) using PCR-RFLP analysis of the mitochondrial DNA D-loop region

    Digital Repository Service at National Institute of Oceanography (India)

    Menezes, M.R.; Ikeda, M.; Taniguchi, N.

    that represent the fragment pattern generated by each of the restriction endonucleases, was compiled for each individual. The effective number of haplotypes (ne) C2 ne ¼ 1 C6x 2 i C0C1 C01 C3 and haplotype diversity (h) were calculated in each population... restriction pattern were determined (unpubl. data). Skipjack tuna individuals from India and Japan shared the most common restriction pattern in each endonuclease digestion, while some patterns occurred in only one population. Combining haplotype designations...

  20. Accounting for age uncertainty in growth modeling, the case study of yellowfin tuna (Thunnus albacares of the Indian Ocean.

    Directory of Open Access Journals (Sweden)

    Emmanuelle Dortel

    Full Text Available Age estimates, typically determined by counting periodic growth increments in calcified structures of vertebrates, are the basis of population dynamics models used for managing exploited or threatened species. In fisheries research, the use of otolith growth rings as an indicator of fish age has increased considerably in recent decades. However, otolith readings include various sources of uncertainty. Current ageing methods, which converts an average count of rings into age, only provide periodic age estimates in which the range of uncertainty is fully ignored. In this study, we describe a hierarchical model for estimating individual ages from repeated otolith readings. The model was developed within a Bayesian framework to explicitly represent the sources of uncertainty associated with age estimation, to allow for individual variations and to include knowledge on parameters from expertise. The performance of the proposed model was examined through simulations, and then it was coupled to a two-stanza somatic growth model to evaluate the impact of the age estimation method on the age composition of commercial fisheries catches. We illustrate our approach using the sagittal otoliths of yellowfin tuna of the Indian Ocean collected through large-scale mark-recapture experiments. The simulation performance suggested that the ageing error model was able to estimate the ageing biases and provide accurate age estimates, regardless of the age of the fish. Coupled with the growth model, this approach appeared suitable for modeling the growth of Indian Ocean yellowfin and is consistent with findings of previous studies. The simulations showed that the choice of the ageing method can strongly affect growth estimates with subsequent implications for age-structured data used as inputs for population models. Finally, our modeling approach revealed particularly useful to reflect uncertainty around age estimates into the process of growth estimation and it can

  1. Accounting for age uncertainty in growth modeling, the case study of yellowfin tuna (Thunnus albacares) of the Indian Ocean.

    Science.gov (United States)

    Dortel, Emmanuelle; Massiot-Granier, Félix; Rivot, Etienne; Million, Julien; Hallier, Jean-Pierre; Morize, Eric; Munaron, Jean-Marie; Bousquet, Nicolas; Chassot, Emmanuel

    2013-01-01

    Age estimates, typically determined by counting periodic growth increments in calcified structures of vertebrates, are the basis of population dynamics models used for managing exploited or threatened species. In fisheries research, the use of otolith growth rings as an indicator of fish age has increased considerably in recent decades. However, otolith readings include various sources of uncertainty. Current ageing methods, which converts an average count of rings into age, only provide periodic age estimates in which the range of uncertainty is fully ignored. In this study, we describe a hierarchical model for estimating individual ages from repeated otolith readings. The model was developed within a Bayesian framework to explicitly represent the sources of uncertainty associated with age estimation, to allow for individual variations and to include knowledge on parameters from expertise. The performance of the proposed model was examined through simulations, and then it was coupled to a two-stanza somatic growth model to evaluate the impact of the age estimation method on the age composition of commercial fisheries catches. We illustrate our approach using the sagittal otoliths of yellowfin tuna of the Indian Ocean collected through large-scale mark-recapture experiments. The simulation performance suggested that the ageing error model was able to estimate the ageing biases and provide accurate age estimates, regardless of the age of the fish. Coupled with the growth model, this approach appeared suitable for modeling the growth of Indian Ocean yellowfin and is consistent with findings of previous studies. The simulations showed that the choice of the ageing method can strongly affect growth estimates with subsequent implications for age-structured data used as inputs for population models. Finally, our modeling approach revealed particularly useful to reflect uncertainty around age estimates into the process of growth estimation and it can be applied to any

  2. Spatial Patterns and Temperature Predictions of Tuna Fatty Acids: Tracing Essential Nutrients and Changes in Primary Producers.

    Directory of Open Access Journals (Sweden)

    Heidi R Pethybridge

    Full Text Available Fatty acids are among the least understood nutrients in marine environments, despite their profile as key energy components of food webs and that they are essential to all life forms. Presented here is a novel approach to predict the spatial-temporal distributions of fatty acids in marine resources using generalized additive mixed models. Fatty acid tracers (FAT of key primary producers, nutritional condition indices and concentrations of two essential long-chain (≥C20 omega-3 fatty acids (EFA measured in muscle of albacore tuna, Thunnus alalunga, sampled in the south-west Pacific Ocean were response variables. Predictive variables were: location, time, sea surface temperature (SST and chlorophyll-a (Chla, and phytoplankton biomass at time of catch and curved fork length. The best model fit for all fatty acid parameters included fish length and SST. The first oceanographic contour maps of EFA and FAT (FATscapes were produced and demonstrated clear geographical gradients in the study region. Predicted changes in all fatty acid parameters reflected shifts in the size-structure of dominant primary producers. Model projections show that the supply and availability of EFA are likely to be negatively affected by increases in SST especially in temperate waters where a 12% reduction in both total fatty acid content and EFA proportions are predicted. Such changes will have large implications for the availability of energy and associated health benefits to high-order consumers. Results convey new concerns on impacts of projected climate change on fish-derived EFA in marine systems.

  3. Comportamiento del síndrome de inmovilización. Hogar de Ancianos, Las Tunas, 2011

    Directory of Open Access Journals (Sweden)

    Mirian Thomas Santiesteban

    2015-11-01

    Full Text Available Se realizó un estudio descriptivo de corte transversal para describir el comportamiento de la inmovilización en el Hogar de Ancianos Carlos Pupo Font, de la provincia de Las Tunas, durante el año 2011. El universo lo constituyeron la totalidad de pacientes institucionalizados y la muestra estuvo conformada por 98 pacientes con algún tipo de inmovilización. Las variables a medir fueron: tipo de inmovilidad, edad, sexo, raza, hábitos tóxicos, estado mental, cambios fisiológicos ocurridos con el envejecimiento, enfermedades frecuentes, complicaciones y factores sociales. La información se obtuvo de la revisión de historias clínicas, fue procesada estadísticamente usando el Microsoft Excel, los resultados se mostraron a través de tablas y gráficos y se compararon con la literatura nacional e internacional. Se obtuvo predominio de pacientes con inmovilización relativa; el grupo de edad más afectado fue de 75 a 84 años, el sexo femenino, la raza blanca y el estado mental correspondiente a los demenciados; el hábito tóxico predominante fue el café; los cambios fisiológicos con el envejecimiento y las enfermedades más frecuentes corresponden a las del aparato músculo esquelético; las complicaciones predominantes fueron las digestivas seguidas por las respiratorias.

  4. Nivel de conocimientos de médicos generales integrales de Las Tunas sobre nutrición humana

    Directory of Open Access Journals (Sweden)

    Eslhey Sánchez Domínguez

    2014-08-01

    Full Text Available La nutrición humana es un instrumento imprescindible a la hora de realizar intervenciones de salud, para ello se requiere de profesionales con un nivel adecuado de conocimientos sobre esta materia. Se realizó un estudio observacional, descriptivo, transversal, en las cuatro áreas de salud del municipio de Las Tunas, en el período comprendido entre septiembre de 2010 y febrero de 2011. El objetivo de la investigación fue caracterizar los niveles de conocimientos sobre nutrición humana que tienen los especialistas y los residentes en medicina general integral. La muestra quedó conformada por 162 profesionales, a los que se les aplicó un cuestionario estructurado en cinco temas. Se realizó el análisis porcentual de los resultados y, de acuerdo al análisis integral del cuestionario, el 56,2% demostró conocimientos en los niveles medio y alto, el resto evidenció insuficiencias significativas (71 profesionales. Por el tipo de pregunta, el 49,4% (80 profesionales reveló dificultades en diferentes aspectos que constituyen generalidades de nutrición humana. En contraste con ello, el 62,3% demostró niveles de conocimientos medios y altos acerca del empleo de la nutrición en la prevención y tratamiento de enfermedades. Por temas, las deficiencias se centraron en: Aspectos generales y Alimentos, con el 51,2 y 58,7%, respectivamente. Se concluye que en los profesionales incluidos en el estudio existió un discreto predominio de los que poseen niveles de conocimientos medios y altos sobre nutrición humana. Las mayores deficiencias cognoscitivas estuvieron al relacionar los nutrientes con los alimentos y en aspectos generales de nutrición, que es necesario tener presente a la hora de promocionar estilos de vida saludables

  5. Factores de riesgo para la enteropatía parasitaria en niños del municipio Las Tunas

    Directory of Open Access Journals (Sweden)

    Arley Fajardo Ochoa

    2015-11-01

    Full Text Available Se realizó un estudio analítico de tipo caso control, con el objetivo de determinar los factores de riesgo para la enteropatía parasitaria, como principal causa del síndrome de malabsorción intestinal en niños del municipio de Las Tunas durante el año 2011. El mismo fue realizado en el Hospital Pediátrico Provincial “Mártires de Las Tunas”, con una muestra de 87 pacientes que formaron parte del grupo de estudio, cuyos datos se recolectaron de la consulta médica de gastroenterología en el policlínico de consulta externa de dicha unidad asistencial y 174 en el grupo control, tomados de pacientes que acudieron a la consulta de urología, paralela en tiempo y contigua a la de gastroenterología. A cada grupo se le realizó un interrogatorio y examen físico exhaustivo, que permitió recoger todos los posibles factores de riesgo existentes. Para la determinación de los factores de riesgo se utilizaron los paquetes de programas estadísticos Epinfo versión 6, en el que se realizaron análisis univariados y se evaluó el ODDS RATIO, intervalo de confianza y probabilidad. El procesamiento de los datos se realizó con un 95% de confiabilidad. Los factores de riesgo asociados a la enteropatía parasitaria fueron: pertenecer al sexo masculino, los hábitos higiénicos inadecuados, estado nutricional inadecuado, la ingestión de agua sin hervir y la evacuación de excretas no sanitarias. Se recomienda realizar estudios analíticos para determinar la asociación de otros factores de riesgo, con vistas a establecer programas de intervención en estos pacientes.

  6. Alteraciones genéticas cutáneas diagnosticadas en la infancia, Las Tunas 2010-2012

    Directory of Open Access Journals (Sweden)

    Yordania Velázquez Ávila

    2014-08-01

    Full Text Available Las enfermedades genéticas y los defectos genéticos con afectación cutánea son causa frecuente de estigmatización de las personas que las padecen, afectando su adecuada inserción en la sociedad y con ello su calidad de vida. Se estableció una consulta especializada y multidisplinaria en el hospital pediátrico provincial “Mártires de Las Tunas”, fundamentalmente con especialistas de dermatología, genética y pediatría. Se realizó un estudio descriptivo, transversal y prospectivo, en el período del año 2010 al 2012, para caracterizar a estos pacientes. Las variables estudiadas relacionadas fueron el sexo, la edad biológica al diagnóstico, el municipio de procedencia y la mortalidad. Los resultados se expusieron en tablas de contingencia de N x N. Existió predominio de las genodermatosis, seguido de los defectos congénitos y pocas enfermedades genéticas con afectación cutánea, siendo estas últimas responsables de la mayoría de las muertes. Las genodermatosis más representadas fueron la ictiosis, las mastocitosis y las neurofibromatosis, la edad más frecuente al diagnóstico fue el grupo de los menores de dos años; prevaleció el sexo femenino. La mortalidad fue baja y los municipios más afectados por genodermatosis fueron Las Tunas, Majibacoa y Colombia

  7. 75 FR 35435 - Fisheries of the Northeastern United States; Atlantic Deep-Sea Red Crab Fisheries; 2010 Atlantic...

    Science.gov (United States)

    2010-06-22

    ... United States; Atlantic Deep-Sea Red Crab Fisheries; 2010 Atlantic Deep-Sea Red Crab Specifications In... finalized 2010 specifications for the Atlantic deep-sea red crab fishery, including a target total allowable... Atlantic Deep-Sea Red Crab Fishery Management Plan (FMP) allow NMFS to make an in-season adjustment to the...

  8. 75 FR 49420 - Fisheries of the Northeastern United States; Atlantic Deep-Sea Red Crab Fisheries; 2010 Atlantic...

    Science.gov (United States)

    2010-08-13

    ... United States; Atlantic Deep-Sea Red Crab Fisheries; 2010 Atlantic Deep-Sea Red Crab Specifications In... (TAC) and corresponding fleet days-at-sea (DAS) allocation for the Atlantic deep- sea red crab fishery... the implementing regulations for the Atlantic Deep- Sea Red Crab Fishery Management Plan (FMP...

  9. 75 FR 7435 - Fisheries of the Northeastern United States; Atlantic Deep-Sea Red Crab Fisheries; 2010 Atlantic...

    Science.gov (United States)

    2010-02-19

    ... United States; Atlantic Deep-Sea Red Crab Fisheries; 2010 Atlantic Deep-Sea Red Crab Specifications... Atlantic deep-sea red crab fishery, including a target total allowable catch (TAC) and a fleet-wide days-at-sea (DAS) allocation. The implementing regulations for the Atlantic Deep-Sea Red Crab Fishery...

  10. Species Profiles. Life Histories and Environmental Requirements of Coastal Fishes and Invertebrates (North Atlantic). Atlantic Herring,

    Science.gov (United States)

    1986-04-01

    Service, Woods Hole, Massachusetts, for reviewing the manuscript. vi Figure 1. Atlantic herring (Clupea harengus L.). ATLANTIC HERRING NOMENCLATURE...extensively reviewed by Svetividov Scales between gill openings and (1952). caudal base ca. 56-62; ventral scutes Preferred common name . Atlantic...summer, 7 A AL and cladocerans in summer and autumn Ann - Jeffreys Ledge area in winter (Sherman and Perkins 1971). (Creaser and Libby 1982). Adults Food

  11. IDENTIFICATION OF OCEANOGRAPHIC PARAMETERS FOR DETERMINING PELAGIC TUNA FISHING GROUND IN THE NORTH PAPUA WATERS USING MULTI-SENSOR SATELLITE DATA

    Directory of Open Access Journals (Sweden)

    VlNCENTIUS SlREGAR

    2006-01-01

    Full Text Available The North Papua waters as one of the important fi shing grounds in the world contribute approximately 75% of world production of pelagic tunas. These fishing grounds are still determined by hunting method. This method is time consuming and costly. However, in many areas determination of fishing ground using satellited data lias been applied by detecting the important oceanographic parameter of the presence of fish schooling such as, sea surface temperature and chlorophyl. Mostly these parameters are used integrat edly. The aim of this study is to assess the important oceanographic parameters detected from mu lti-sensor satellites (NO AA/AVHRR, Seawifs and Topex Poisedon for determining fishing ground of pelagic tunas in the North Papua waters at east season. The parameters include Sea Surface Temperature (STT, chlorophyl-a and currents. The ava ilability of data from optic sensor (Seawifs: chl-a and AVHRR: Thermal is limited by the presence of cloud cover. In that case, Topex Poseidon satellite data can be used to provide the currents data. The integration of data from multi-sensors increases the availability of the oceanographic parameters for prediction of the potential fishing zones in the study area.

  12. Physico-Chemical Characteristics and Fatty acid Profiles of Smoked Skipjack Tuna (Katsuwonus pelamis Using Coconut Fiber and nutmeg Shell Smoking materials

    Directory of Open Access Journals (Sweden)

    Netty Salindeho

    2017-08-01

    Full Text Available Skipjack tuna is one of the most popular fish processed through a traditional smoking method in North Sulawesi. This study was aimed to analyze the physicochemical characteristics and fatty acid profiles of skipjack tuna, Katsuwonus pelamis, smoked using coconut fibers and nutmeg shell for 15 hours of smoking. Results found that the smoked skipjack using the nutmeg shell smoking material had the lower watercontent and aw, and higher protein, fat and ash content than those smoked with coconut fiber (P<0.05. The fatty acid profile of the smoked skipjack using nutmeg shell showed lower total Saturated Fatty Acid(SFA and higher Monounsaturated Fatty Acid (MUFA and Polyunsaturated Fatty Acid (PUFA than those smoked with coconut fiber (P<0.05. The organoleptic test showed for smoking materials of coconut fiber and nutmeg shell, respectively,  as follows: color was 4.97±1.32 and 5.87±0.89; taste was 5.64±0.99 and 5.80±0.88; the texture was 5.17±1.17 and 5.64±1.21; and aroma was 5.67±0.88 and 5.90±0.85. The panelists can accept the smoked skipjack using both smoking materials of coconut fiber and nutmeg shell.

  13. Endogenous level of acetic acid in yellowfin tuna (Thunnus albacares): a pilot study about a possible controversy on its residue nature.

    Science.gov (United States)

    Chiesa, Luca Maria; Pasquale, Elisa; Panseri, Sara; Britti, Domenico; Malandra, Renato; Villa, Roberto; Arioli, Francesco

    2017-03-01

    A method based on headspace solid-phase microextraction (HS-SPME) followed by GC-MS analysis was developed for the determination of underivatised acetic acid in fresh tuna fish muscle. Parameters such as the fibre selected and the extraction time and temperature were optimised and the linearity, detection limits and precision of the whole analytical procedure were assessed. The method was then applied to determine the acetic acid concentration in fresh yellowfin tuna muscles (Thunnus albacares) in order to evaluate the endogenous level and its variations during the shelf life under different storage conditions. A qualitative comparison was also made with variations in histamine levels to evaluate the possibility of the joint monitoring of acetic acid and histamine to identify fish stored in poor conditions. The caudal area always had a lower content of acetic acid than the ventral area, independent of the storage time and temperature. A difference was found between the 6- and 3-day time points and day 0 at a storage temperature of 8°C and between the 6-day time point and day 0 at a storage temperature of 0°C, independent of the anatomical area of the sampled tissue. The evaluation of acetic acid could represent an important approach in the field of food safety to detect the illicit use of acetic acid as an antibacterial preservative treatment or to eliminate the unpleasant smell of trimethylamine.

  14. A large outbreak of scombroid fish poisoning associated with eating yellowfin tuna (Thunnus albacares) at a military mass catering in Dakar, Senegal.

    Science.gov (United States)

    Demoncheaux, J-P; Michel, R; Mazenot, C; Duflos, G; Iacini, C; de Laval, F; Delaval, F; Saware, E M; Renard, J-C

    2012-06-01

    On 26 November 2010, an outbreak of scombroid fish poisoning occurred in the French Armed Forces in Dakar, Senegal. This chemical intoxication, due to high histamine concentration in fish, is often mistaken for an allergic reaction. A case-control study was undertaken including the 71 cases and 78 randomly selected controls among lunch attendees. The usual symptoms for scombroid fish poisoning were observed in cases, i.e. flushing (85.9%), headache (83.1%), rapid/weak pulse (59.1%) and diarrhoea (47.9%). Symptoms occurred from within a few minutes to up to 3 h following the meal. Most patients quickly recovered with antihistamine and/or symptomatic treatment. Tuna was the only food item positively associated with illness (odds ratio 36.3, 95% confidence interval 6.3-210.0), with the risk of illness increasing with the quantity of fish consumed. No bacterial contamination was found in leftover food, but histamine concentration in tuna was found to be 4900 mg/kg, almost 50-fold higher than the concentration allowed by European regulations. This report is unique because of the large size of the case series - to our knowledge, the largest event of scombroid fish poisoning ever reported - and the chemical and bacteriological analyses results obtained on leftover food.

  15. THE FORMATION OF THE LOCAL MUSICAL IDENTITY OF THE CITIZEN FROM LAS TUNAS / LA FORMACIÓN DE LA IDENTIDAD MUSICAL LOCAL DEL TUNERO

    Directory of Open Access Journals (Sweden)

    Elemnia Álvarez Merino

    2012-09-01

    Full Text Available The local music identity, part of the system of identity values, encourages contributing to training in the art instructors of the Bachelor of Education Art Instructor specialty. This paper aims to demonstrate how you can promote the teaching and learning of music from the study of the contents of the musical works of the town, musicians, composers, groups of small and large format and repertoire, Web Site by: Music and musicians from Las Tunas, made for this purpose and offers detailed information on major music events occurred in the town of Las Tunas, since the 40's to today where we find also images and sound with processed information form of hypertext, standard format for you to view information, also offers a proposal made by the authors in order to treat this content in the classroom and beyond, to achieve success in social and cultural transformations that allow to transmit their knowledge maintain its historical and cultural identity, improve the quality of their educational work taking into account the technical scientific advances, in the student to the historical and musical knowledge, experiences, experiential and cultural contributions they receive will contribute to the formation of the identity in the process of forming intentional, organized and systematic.

  16. Colagenosis con afectación dermatológica en edades pediátricas en Las Tunas, 2010 - 2012

    Directory of Open Access Journals (Sweden)

    Katiuska Tamayo Mariño

    2014-08-01

    Full Text Available El estudio de las enfermedades del colágeno en edades pediátricas es relativamente joven y no se cuenta en Las Tunas con archivos que permitan evaluar su comportamiento, por ello se realizó un estudio descriptivo, transversal y prospectivo en el período comprendido entre los años 2010 al 2012, para caracterizar a los pacientes ingresados con estas enfermedades en el hospital pediátrico Mártires de Las Tunas. Inicialmente se determinaron las conectivopatias diagnosticadas con más frecuencia y luego se estudiaron las variables: sexo, edad, color de la piel, procedencia geográfica y antecedentes patológicos familiares de colagenosis, Los resultados fueron expuestos en tablas y expresados en porcientos. Predominaron la artritis idiopática juvenil, seguido de la fiebre reumática y la morfea. El sexo más frecuente fue el femenino, el grupo de edad más afectado fueron los adolescentes mayores de 13 años, el color de la piel que prevaleció fue el blanco y predominaron los pacientes sin antecedentes patológicos familiares de colagenosis

  17. Mineralización de talco asociada a los cuerpos ultramáficos de la Faja del Río de Las Tunas, Cordillera Frontal de Mendoza

    Directory of Open Access Journals (Sweden)

    Gargiulo, María Florencia

    2011-12-01

    Full Text Available Talc mineralization related to the ultramafic bodies of the Río de Las Tunas belt, Frontal Cordillera of Mendoza province. This contribution shows the main characteristics of the talc mineralization related to the Río de Las Tunas ultramafic bodies in the Salamanca Mining District, Frontal Cordillera of Mendoza province. According to the parageneses defined on the studied samples, three generations of talc were established: 1º crystallized in metaperidotites and related to the prograde stage of the regional metamorphism; 2º crystallized inreaction zones (mostly in the talc zone developed at the boundary between metaperidotites and their country-rocks.These reaction zones evidence a metasomatic process due to geochemical gradient between the ultramafic body and their country-rocks. This process was developed during the retrogression of the regional metamorphic cycle. 3º Talc present in shear-zones that cut across the ultramafic bodies. The extreme serpentinization of the ultramaficbodies is concentrated in shear-zones where the serpentine is subsequently replaced by talc ± carbonates related with a hydrothermal stage. Aqueous fluids relatively enriched in CO2 flowed through these shear-zones causing the cease of serpentine formation favoring the talc and/or carbonates. Mined talc deposits are those in shear zones and reaction zones. They are mostly industrial-, asbestine- or talcschist-type. The talc related to the hydrothermal stage can locally reach first and extra qualities.

  18. Quantitative studies and taste reconstitution experiments of the sour and lingering mouthful orosensation in a debittered extract of traditional Japanese dried and fermented skipjack tuna (hongarebushi).

    Science.gov (United States)

    Haseleu, Gesa; Lubian, Elisabetta; Mueller, Stefan; Shi, Feng; Koenig, Thorsten

    2013-04-03

    Hongarebushi, Japanese dried skipjack tuna and a high quality ingredient of Japanese dashi, was investigated for its taste active composition. The recent investigation focused on a debittered fish fraction, which revealed a strong umami and salt impact accompanied with a pleasant and pronounced sourness. Whereas the umami and salt tastes could be correlated to monosodium glutamate (MSG), ribonucleotides, and mineral salts, the pleasant sourness was not exclusively induced by organic acids. The essential compound imparting the sour orosensation, persistence, and mouthfulness of the debittered skipjack tuna extract was investigated, and omission experiments emphasized the impact of N-acetylglutamic acid (NAG) on the overall taste sensation of the debittered fish extract. This metabolite, which is known to be present as a minor constituent in animal- and plant-derived foods, was quantified in this study for the first time in seafood, soybean products, dried shiitake mushrooms, and dried fish in notable amounts. Furthermore, it was described for the first time as an essential taste contributor to the nonvolatile profile of a foodstuff, in this case of a debittered extract of hongarebushi.

  19. Northwest Atlantic Regional Climatology (NCEI Accession 0155889)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — To provide an improved oceanographic foundation and reference for multi-disciplinary studies of the Northwest Atlantic Ocean, NCEI Regional Climatology Team...

  20. Mountain ranges favour vigorous Atlantic meridional overturning

    National Research Council Canada - National Science Library

    Bablu Sinha; Adam T. Blaker; Joël J.-M. Hirschi; Sarah Bonham; Matthew Brand; Simon Josey; Robin S. Smith; Jochem Marotzke

    2012-01-01

      We use a global Ocean-Atmosphere General Circulation Model (OAGCM) to show that the major mountain ranges of the world have a significant role in maintenance of the Atlantic Meridional Overturning Circulation (AMOC...

  1. Atlantic Surfclam and Ocean Quahog Survey

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The standardized NEFSC Atlantic Surfclam and Ocean Quahog Survey has covered an area from Cape Hatteras to Georges Bank. The survey was conducted every two or three...

  2. Atlantic energy and the strategic outlook

    Directory of Open Access Journals (Sweden)

    Paul Isbell

    2013-09-01

    Full Text Available Sweeping changes are beginning to transform energy scenarios around the world. The gas revolution, a renaissance in petroleum technology and exploration, and a chaotic but powerful movement toward the goal of low-carbon economies are three of the principal energy trends currently interacting with structural changes in the geo-economics of the Atlantic world to present new perspectives and opportunitiesfor the diverse actors in the ‘Atlantic Basin’. This article explores how changes in the energy landscape are contributing to a reassessment of the strategic horizon. The potential impacts of the shale revolution, deep-offshore oil, biofuels and other modern renewable energies on the geopolitics of the Atlantic Basin will be assessed, and the hypothesis that an Atlantic Basin energy system is now taking shape will be evaluated, along with an analysis of anticipated impacts.

  3. Atlantic NAD 83 Continental Shelf Boundary (CSB)

    Data.gov (United States)

    Bureau of Ocean Energy Management, Department of the Interior — This data set contains Continental Shelf Boundary (CSB) lines in ESRI shapefile format for the BOEM Atlantic Region. The CSB defines the seaward limit of federally...

  4. Atlantic Marine Mammal Assessment Vessel Surveys

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — These data sets are a compilation of large vessel surveys for marine mammal stock assessments in South Atlantic (Florida to Maryland) waters from 1994 to the...

  5. Atlantic Sharpnose Shark Reproductive Biology Data

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Reproductive data from Atlantic sharpnose sharks were collected from specimens captured throughout the northern Gulf of Mexico on various research vessels. Data...

  6. Atlantic-THORpex Observing System Test

    Data.gov (United States)

    National Aeronautics and Space Administration — Atlantic - THORpex Observing System Test (ATOST) is part of an international research program to accelerate improvements in the accuracy of 1 to 14 day weather...

  7. Atlantic NAD 83 SLA Baseline Points

    Data.gov (United States)

    Bureau of Ocean Energy Management, Department of the Interior — This data set contains baseline points in ArcGIS shapefile format for the BOEM Atlantic Region. Baseline points are the discrete coordinate points along the...

  8. Atlantic NAD 83 SLA Baseline Tangents

    Data.gov (United States)

    Bureau of Ocean Energy Management, Department of the Interior — This data set contains baseline tangent lines in ArcGIS shapefile format for the BOEM Atlantic Region. Baseline tangent lines are typically bay or river closing...

  9. First records of parasitic copepods (Crustacea, Siphonostomatoida) from marine fishes in Korea.

    Science.gov (United States)

    Venmathi Maran, B A; Soh, H Y; Hwang, U W; Chang, C Y; Myoung, J G

    2015-06-01

    The knowledge of the biodiversity of parasitic copepods in South Korea is increasing. Interestingly we report here, some parasitic copepods considered as the first record of findings from Korea. Nine species of parasitic copepods (Siphonostomatoida) including six genera of three different families [Caligidae (7), Lernaeopodidae (1), Lernanthropidae (1)] were recovered from eight species of wild fishes in Korea: 1) Caligus hoplognathi Yamaguti & Yamasu, 1959 (♀, ♂) from the body surface of barred knifejaw Oplegnathus fasciatus (Temminck & Schlegel); 2) Caligus lagocephali Pillai, 1961 (♀) from the gills of panther puffer Takifugu pardalis (Temminck & Schlegel); 3) Euryphorus brachypterus (Gerstaecker, 1853) (♀, ♂) from the opercular cavity of Atlantic bluefin tuna Thunnus thynnus (Linnaeus); 4) Euryphorus nordmanni Milne Edwards, 1840 (♀, ♂) from the opercular cavity of common dolphin fish Coryphaena hippurus Linnaeus; 5) Gloiopotes huttoni (Thomson) (♀, ♂) from the body surface of black marlin Istiompax indica (Cuvier); 6) Lepeophtheirus hapalogenyos Yamaguti & Yamasu, 1959 (♀) from the gill filaments of O. fasciatus; 7) Lepeophtheirus sekii Yamaguti, 1936 (♀, ♂) from the body surface of red seabream Pagrus major (Temminck & Schlegel); 8) Brachiella thynni Cuvier, 1830 (♀) from the body surface of longfin tuna or albacore Thunnus alalunga (Bonnaterre); 9) Lernanthropinus sphyraenae (Yamaguti & Yamasu, 1959) (♀) from the gill filaments of moon fish Mene maculata (Bloch & Schneider). Since the female was already reported in Korea, it is a new record for the male of C. hoplognathi. A checklist for the parasitic copepods of the family Caligidae, Lernaeopodidae and Lernanthropidae of Korea is provided.

  10. Comportamiento de la polifarmacia en el hogar de ancianos “Carlos Font Pupo”, Las Tunas, 2011

    Directory of Open Access Journals (Sweden)

    Sahily de la Caridad Rojas Pérez

    2015-11-01

    Full Text Available El envejecimiento conlleva a un mayor consumo de fármacos en los ancianos, elevando la probabilidad de ocurrencia de interacciones medicamentosas y reacciones adversas, afectando la calidad de vida de este tipo de paciente. Se realizó un estudio descriptivo de corte transversal para caracterizar la polifarmacia en el Hogar de Ancianos “Carlos Pupo Font”, en Las Tunas, durante el año 2011. El universo estuvo constituido por la totalidad de pacientes institucionalizados y la muestra por 102 ancianos con criterio de selección de consumo de tres o más medicamentos de forma simultánea en el período de estudio. Se caracterizó la edad y sexo de los ancianos, frecuencia de polifarmacia, los grupos farmacológicos implicados, las principales afecciones clínicas y las posibles interacciones medicamentosas por las prescripciones realizadas. La información se obtuvo de la revisión de historias clínicas y fue procesada mediante la estadística descriptiva. El sexo femenino y el grupo de edad entre 75 y 84 años fueron los predominantes. Un 47% de los ancianos consumió cuatro medicamentos simultáneamente. Los antihipertensivos fueron los medicamentos más usados, seguidos por los AINEs. El 72% de la muestra padece afecciones cardiorrespiratorias y el 68% afecciones músculo esqueléticas. Se identificaron posibles interacciones medicamentosas relacionadas con el proceso de absorción, dadas por uniones de ácidos y bases débiles y por interacciones con alimentos, específicamente con la leche. La polimedicación puede ser racionalizada a través de un uso adecuado de los medicamentos, teniendo en cuenta el intervalo de dosificación, las características químicas de los fármacos, la dosis y las características individuales del paciente.

  11. Efectividad del tratamiento acupuntural en la Parálisis Facial Periférica. Puerto Padre, Las Tunas

    Directory of Open Access Journals (Sweden)

    Dorania Cera Barea

    2015-11-01

    Full Text Available Se realizó un estudio experimental en pacientes mayores de 19 años, con Parálisis Facial Periférica, que fueron atendidos en el Policlínico "Romárico Oro Peña" del municipio de Puerto Padre, provincia de Las Tunas; en el período comprendido entre enero y diciembre del año 2011. La muestra quedó conformada por 40 pacientes que cumplieron con los criterios de inclusión establecidos, a los que se les aplicó el método acupuntural, con el objetivo de evaluar la efectividad del mismo en el tratamiento de esta enfermedad. Los puntos de acupuntura utilizados fueron: Extra 1, 2, 3; Estómago 2, 4, 6, 7; Vaso Concepción 24; Vaso Gobernador 26 y Vesícula Biliar 14. Se aplicó tonificación en el lado sano y dispersión de la energía en el lado de la parálisis. Se recogió la información a través de micro-historias clínicas, donde se incluyeron todas las variables de manera independiente. Los datos se analizaron a través de la estadística descriptiva y el análisis porcentual. Se concluyó que la enfermedad predominó en el sexo femenino y el grupo etáreo de 40 a 49 años; la exposición al frío y/o al calor resultó el factor desencadenante que más incidió; el mayor número de pacientes presentó una evolución clínica favorable; solo se presentaron dos efectos adversos relativos al uso de la acupuntura, demostrando la inocuidad del tratamiento.

  12. 75 FR 57698 - Atlantic Highly Migratory Species; Atlantic Billfish Management, White Marlin (Kajikia albidus

    Science.gov (United States)

    2010-09-22

    ... marlin as the waters of the entire Atlantic Ocean and maintained the management unit definitions of... the HMS definition in the MSA, when the Regional Fishery Management Councils managed Atlantic HMS, the... definition and to continue to manage that species via Secretarial management. This action will amend the MSA...

  13. The role of Atlantic-Arctic exchange in North Atlantic multidecadal climate variability

    NARCIS (Netherlands)

    Frankcombe, L.M.|info:eu-repo/dai/nl/304829838; Dijkstra, H.A.|info:eu-repo/dai/nl/073504467

    2011-01-01

    It has recently been suggested that multidecadal variability in North Atlantic sea surface temperature occurs with two dominant periods. In this paper we investigate the origin of these two time scales in a 500 year control run of the GFDL CM2.1 model. We focus on the exchange between the Atlantic

  14. 76 FR 65700 - Atlantic Highly Migratory Species; Advisory Panel for Atlantic Highly Migratory Species Southeast...

    Science.gov (United States)

    2011-10-24

    ... National Oceanic and Atmospheric Administration RIN 0648-XA776 Atlantic Highly Migratory Species; Advisory Panel for Atlantic Highly Migratory Species Southeast Data, Assessment, and Review Workshops AGENCY... Migratory Species (HMS) Southeast Data, Assessment, and Review (SEDAR) Workshops (this AP is also called the...

  15. Response of the Atlantic overturning circulation to South Atlantic sources of buoyancy

    NARCIS (Netherlands)

    Weijer, W.; Ruijter, W.P.M. de; Sterl, A.; Drijfhout, S.

    2001-01-01

    The heat and salt input from the Indian to Atlantic Oceans by Agulhas Leakage is found to influence the Atlantic overturning circulation in a low-resolution Ocean General Circulation Model. The model used is the Hamburg Large-Scale Geostrophic (LSG) model, which is forced by mixed boundary

  16. 75 FR 30483 - Atlantic Highly Migratory Species; Atlantic Shark Management Measures; Amendment 3

    Science.gov (United States)

    2010-06-01

    ... Species; Atlantic Shark Management Measures; Amendment 3; Final Rule #0;#0;Federal Register / Vol. 75 , No... Species; Atlantic Shark Management Measures; Amendment 3 AGENCY: National Marine Fisheries Service (NMFS... management alternatives available to rebuild blacknose sharks and end overfishing of blacknose and shortfin...

  17. 77 FR 35357 - Atlantic Highly Migratory Species; Commercial Atlantic Region Non-Sandbar Large Coastal Shark...

    Science.gov (United States)

    2012-06-13

    ...; Commercial Atlantic Region Non-Sandbar Large Coastal Shark Fishery Opening Date AGENCY: National Marine...-sandbar large coastal shark fishery. This action is necessary to inform fishermen and dealers about the fishery opening date. DATES: The commercial Atlantic region non-sandbar large coastal shark fishery will...

  18. 75 FR 22103 - Atlantic Coastal Fisheries Cooperative Management Act Provisions; Atlantic Coastal Shark Fishery

    Science.gov (United States)

    2010-04-27

    ... Management Act Provisions; Atlantic Coastal Shark Fishery AGENCY: National Marine Fisheries Service (NMFS... Atlantic Coastal Sharks (Plan) and that the measures New Jersey has failed to implement and enforce are necessary for the conservation of the shark resource. This determination is consistent with the findings of...

  19. 75 FR 57235 - Atlantic Highly Migratory Species; Atlantic Shark Management Measures

    Science.gov (United States)

    2010-09-20

    ... Species; Atlantic Shark Management Measures AGENCY: National Marine Fisheries Service (NMFS), National....S. Atlantic shark fishery to address several specific issues currently affecting management of the shark fishery and to identify specific goals for management of fishery in the future. NMFS is requesting...

  20. 78 FR 70500 - Atlantic Highly Migratory Species; 2014 Atlantic Shark Commercial Fishing Seasons

    Science.gov (United States)

    2013-11-26

    ...; 2014 Atlantic Shark Commercial Fishing Seasons AGENCY: National Marine Fisheries Service (NMFS... for the Atlantic commercial shark fisheries. The quota adjustments are based on over- and/or... for commercial shark fishermen in all regions and areas. These actions could affect fishing...

  1. 77 FR 75896 - Atlantic Highly Migratory Species; 2013 Atlantic Shark Commercial Fishing Season

    Science.gov (United States)

    2012-12-26

    ... Species; 2013 Atlantic Shark Commercial Fishing Season AGENCY: National Marine Fisheries Service (NMFS... the Atlantic commercial shark fisheries (sandbar sharks, non-sandbar large coastal sharks, blue sharks, porbeagle sharks, and pelagic sharks (other than porbeagle and blue sharks), non-blacknose small coastal...

  2. 76 FR 65673 - Atlantic Highly Migratory Species; Atlantic Shark Management Measures; Correction

    Science.gov (United States)

    2011-10-24

    ... Species; Atlantic Shark Management Measures; Correction AGENCY: National Marine Fisheries Service (NMFS... several Atlantic shark stocks and announced NMFS' intent to amend the 2006 Consolidated Highly Migratory Species (HMS) Fishery Management Plan (FMP) via the rulemaking process to rebuild these shark stocks and...

  3. 78 FR 54195 - Atlantic Highly Migratory Species; Atlantic Commercial Shark Fisheries

    Science.gov (United States)

    2013-09-03

    ... Species; Atlantic Commercial Shark Fisheries AGENCY: National Marine Fisheries Service (NMFS), National.... SUMMARY: NMFS is transferring 68 metric tons (mt) dressed weight (dw) of non-blacknose small coastal shark... adjustments, and applies to commercial Atlantic shark permitted vessels. DATES: The quota transfer is...

  4. 75 FR 250 - Atlantic Highly Migratory Species; Atlantic Commercial Shark Management Measures

    Science.gov (United States)

    2010-01-05

    ...; Atlantic Commercial Shark Management Measures AGENCY: National Marine Fisheries Service (NMFS), National... sandbar sharks, non-sandbar large coastal sharks (LCS), small coastal sharks (SCS), and pelagic sharks based on any over- and/or underharvests experienced during the 2008 and 2009 Atlantic commercial shark...

  5. 78 FR 52487 - Atlantic Highly Migratory Species; 2014 Atlantic Shark Commercial Fishing Season

    Science.gov (United States)

    2013-08-23

    ... Species; 2014 Atlantic Shark Commercial Fishing Season AGENCY: National Marine Fisheries Service (NMFS... season for the Atlantic commercial shark fisheries. Quotas would be adjusted as allowable based on any..., fishing opportunities for commercial shark fishermen in all regions and areas. The proposed measures could...

  6. 76 FR 53652 - Atlantic Highly Migratory Species; Atlantic Shark Management Measures

    Science.gov (United States)

    2011-08-29

    ... Species; Atlantic Shark Management Measures AGENCY: National Marine Fisheries Service (NMFS), National... sharks in the family Sphyrnidae (except for Sphyrna tiburo) and oceanic whitetip sharks (Carcharhinus...-427-8503 or by fax: 301-713-1917. SUPPLEMENTARY INFORMATION: The U.S. Atlantic shark fisheries are...

  7. Influence of the Atlantic subpolar gyre on the thermohaline circulation.

    Science.gov (United States)

    Hátún, Hjálmar; Sandø, Anne Britt; Drange, Helge; Hansen, Bogi; Valdimarsson, Hedinn

    2005-09-16

    During the past decade, record-high salinities have been observed in the Atlantic Inflow to the Nordic Seas and the Arctic Ocean, which feeds the North Atlantic thermohaline circulation (THC). This may counteract the observed long-term increase in freshwater supply to the area and tend to stabilize the North Atlantic THC. Here we show that the salinity of the Atlantic Inflow is tightly linked to the dynamics of the North Atlantic subpolar gyre circulation. Therefore, when assessing the future of the North Atlantic THC, it is essential that the dynamics of the subpolar gyre and its influence on the salinity are taken into account.

  8. SINTESIS FOSFOLIPID MENGANDUNG ASAM LEMAK w-3 DARI FOSFOLIPID KEDELAI DAN MINYAK KAYA ASAM LEMAK w-3 DARI HASIL SAMPING PENGALENGAN TUNA

    Directory of Open Access Journals (Sweden)

    Teti Estiasih

    2013-03-01

    Full Text Available Synthesis of Phospholipid Containing w-3 Fatty Acids from Soy Phospholipidsand Fish Oil Enriched with w-3 Fatty Acids from Tuna Canning Processing Teti Estiasih, Moch. Nur, Jaya Mahar Maligan, Satrio Maulana ABSTRAK Keunggulan fosfolipid dapat ditingkatkan dengan menggabungkan asam lemak w-3, terutama EPA (eicosapentaenoicacid, C20:5w-3 dan DHA (docosahexaenoic acid, C22:6w-3, pada struktur fosfolipid sehingga diperoleh fosfolipidterstruktur. Strukturisasi fosfolipid kedelai komersial dilakukan dengan cara mengganti asam lemak dari fosfolipidkedelai dengan asam lemak w-3 dari minyak kaya asam lemak w-3 dari hasil samping pengalengan tuna. Sintesisfosfolipid terstruktur dilakukan secara asidolisis enzimatis dengan menggunakan lipase dari R. miehei. Faktor yangdikaji pada proses sintesis ini adalah konsentrasi enzim dan lama sintesis. Tingkat inkorporasi EPA dan DHA padastruktur fosfolipid dipengaruhi oleh konsentrasi enzim. Pada konsentrasi enzim yang rendah, peningkatan lama reaksisetelah tingkat inkoporasi optimum tercapai cenderung menyebabkan penurunan tingkat inkorporasi EPA+DHA. Padakonsentrasi enzim yang tinggi, lama reaksi tampaknya tidak mempengaruhi tingkat inkorporasi. Tingkat inkorporasiDHA lebih tinggi dari EPA sehingga fosfolipid terstruktur yang dihasilkan sangat sesuai digunakan untuk produk panganyang memerlukan kadar DHA tinggi. Ada preferensi inkorporasi EPA+DHA pada fosfatidiletanolamin dibandingkanjenis fosfolipid yang lain.Kata kunci: Fosfolipid terstruktur, asam lemak w-3, EPA, DHA, asidolisis enzimatis ABSTRACT The superiority of soy phospholipids could be obtained by incorporation of w-3 fatty acids into phospholipids structure,especially EPA (eicosapentaenoic acid, C20:5w-3 and DHA docosahexaenoic acid, C22:6w-3. Structurization ofcommercial soy phospholipids was conducted by replacement of natural fatty acids in soy phospholipids by w-3 fattyacids from w-3 fatty acids enriched Þ sh oil from tuna canning processing

  9. Formulación de una mermelada a partir de pulpa y cáscara de tunas (Opuntia spp. elaborada a nivel planta piloto Formulación de una mermelada a partir de pulpa y cáscara de tunas (Opuntia spp. elaborada a nivel planta piloto

    Directory of Open Access Journals (Sweden)

    José Luis Magaña Ramírez

    2012-02-01

    Full Text Available After a series of experimental tests of jam pulp-based and peel of prickly pear fruit at a laboratory level, generated from previous research projects, and based on results of sensory evaluation, microbiological and physicochemical analysis, it was selected a formulation for a jam from a mixture of pulp and peel of prickly pear fruit “reyna” variety, and “xoconostle” prickly pear fruit pulp for processing at the pilot platform. The jam produced was characterized by physicochemical analysis and microbiological. In the physicochemical analysis, it was included the determination of dietetic fiber (4.35 g dietetic fiber/15 g jam, being one of the most important evaluation, which value comes mainly from the skin of prickly pear fruit. From the physicochemical analysis, it was designed a label for the jam produced. Based on the specifications required by the “Norma Oficial Mexicana”, the product can be considered suitable for consumption and marketing purposes. Después de una serie de pruebas experimentales de mermeladas a base de pulpa y cás­cara de tunas a nivel laboratorio, generados de proyectos de investigación anteriores, y con base en resultados de evaluación sensorial, análisis microbiológico y fisicoquímico, se seleccionó una formulación de mermelada a partir de una mezcla de pulpa y cáscara de tuna variedad reyna, y pulpa de tuna variedad xoconostle para su procesamiento a nivel planta piloto. La mermelada elaborada fue caracterizada mediante análisis fisicoquímico y microbiológico. Dentro de los análisis fisicoquímicos se incluyó la determinación de Fibra Dietética (4.35 g de fibra dietética/15 g de mermelada, siendo éste uno de los análisis más importantes, cuyo valor procede principalmente de la cáscara de las tunas. Basados en las especificaciones exigidas por la Norma Oficial Mexicana, el producto puede considerarse apto para su consumo y para propósitos de comercialización.

  10. Atlantic coastal plain geothermal test holes, Virginia: hole completion reports

    Energy Technology Data Exchange (ETDEWEB)

    Cobb, L.B.; Radford, L.; Glascock, M.

    1979-03-01

    A description of the Atlantic Coastal Plain Geothermal Drilling Program and data for the following geothermal test holes drilled in Virginia are summarized: Creeds, Norfolk Naval Base, Langley Air Force Base, Wattsville, Withams, and Atlantic.

  11. Seasonal predictability of the North Atlantic Oscillation

    Science.gov (United States)

    Vellinga, Michael; Scaife, Adam

    2015-04-01

    Until recently, long-range forecast systems showed only modest levels of skill in predicting surface winter climate around the Atlantic Basin and associated fluctuations in the North Atlantic Oscillation at seasonal lead times. Here we use a new forecast system to assess seasonal predictability of winter North Atlantic climate. We demonstrate that key aspects of European and North American winter climate and the surface North Atlantic Oscillation are highly predictable months ahead. We demonstrate high levels of prediction skill in retrospective forecasts of the surface North Atlantic Oscillation, winter storminess, near-surface temperature, and wind speed, all of which have high value for planning and adaptation to extreme winter conditions. Analysis of forecast ensembles suggests that while useful levels of seasonal forecast skill have now been achieved, key sources of predictability are still only partially represented and there is further untapped predictability. This work is distributed under the Creative Commons Attribution 3.0 Unported License together with an author copyright. This license does not conflict with the regulations of the Crown Copyright.

  12. Analysis of Social and Emotional Development of Orphaned Youth in terms of Self Concept and Resilience: Study at Child Care Children's Home (PSAA Tunas Bangsa Pati

    Directory of Open Access Journals (Sweden)

    Santoso Santoso

    2017-08-01

    Full Text Available The purpose of this study is to describe the development of the Young Social da Emotional Self-concept and in terms of resilience in the PSAA Tunas Bangsa Pati. The method used is descriptive research with this type of development studies dab data obtained will be analyzed by cross sectional method. The results showed that the concept of self-possessed teenager PSAA is not good, it can be seen from the description of several indicators show that the concept of self-assessment of her teenage less well because many feel insecure and inferiority. Judging from the resilience, the general adolescent PSAA good enough. It can be seen from the emotion management capabilities of any events that are considered less menyengakan life. So overall it can be concluded that the social development of adolescents PSAA poorly and emotional development PSAA pretty good when viewed from the concept of self and resilience.

  13. REPOSITORIO DIGITAL PARA UNA MEJOR GESTIÓN DE LA INFORMACIÓN CIENTÍFICA EN LA UNIVERSIDAD LAS TUNAS

    Directory of Open Access Journals (Sweden)

    Yunior Rodríguez Rodríguez

    2015-07-01

    Full Text Available El presente artículo aborda la importancia de la implementación de un repositorio digital para una mejor gestión de la información científica en la Universidad de Las Tunas, donde podamos socializar y consultar las tesis de grado, maestría y doctorado, resultados de proyectos de investigación, libros, revistas, manuscritos creados en nuestra Universidad e incluso digitalizar libros de única edición y de difícil acceso. Se ofrecen definiciones de varios autores así como los antecedentes de la gestión de información científica en nuestra universidad, además de las ventajas de su creación. También se muestra el diagnóstico y la estrategia para si implementación.

  14. Influence of Atlantic SST anomalies on the atmospheric circulation in the Atlantic-European sector

    Directory of Open Access Journals (Sweden)

    E. Kestenare

    2003-06-01

    Full Text Available Recent studies of observational data suggest that Sea Surface Temperature (SST anomalies in the Atlantic Ocean have a significant influence on the atmospheric circulation in the Atlantic-European sector in early winter and in spring. After reviewing this work and showing that the spring signal is part of a global air-sea interaction, we analyze for comparison an ensemble of simulations with the ECHAM4 atmospheric general circulation model in T42 resolution forced by the observed distribution of SST and sea ice, and a simulation with the ECHAM4/OPA8 coupled model in T30 resolution. In the two cases, a significant influence of the Atlantic on the atmosphere is detected in the Atlantic-European sector. In the forced mode, ECHAM4 responds to SST anomalies from early spring to late summer, and also in early winter. The forcing involves SST anomalies not only in the tropical Atlantic, but also in the whole tropical band, suggesting a strong ENSO influence. The modeled signal resembles that seen in the observations in spring, but not in early winter. In the coupled mode, the Atlantic SST only has a significant influence on the atmosphere in summer. Although the SST anomaly is confined to the Atlantic, the summer signal shows some similarity with that seen in the forced simulations. However, there is no counterpart in the observations.

  15. Características de la infección por geohelmintos intestinales en escolares primarios de la provincia de Las Tunas

    Directory of Open Access Journals (Sweden)

    Rebeca M. Laird Pérez

    2014-08-01

    Full Text Available Se realizó un estudio transversal descriptivo, en el período comprendido entre los meses de septiembre y diciembre de 2004, con el objetivo de caracterizar la infección por geohelmintos intestinales en escolares de la enseñanza primaria de la provincia de Las Tunas. Se estudiaron 1 342 escolares pertenecientes a 35 escuelas de los estratos urbano y rural de los ocho municipios de la provincia. De cada escolar se procesó una muestra de heces por los procedimientos Directo y Kato Katz y se practicó el método de Harada Moris cuando se observaron huevos de ancylostomídeos. A los escolares parasitados por geohelmintos se les determinó su condición clínica. Se obtuvo una prevalencia general de la infección por geohelmintos intestinales del 16,2%, con predominio de la intensidad general de la infección ligera. Los gusanos trichúridos fueron los más observados, asociados a la mayoría de las infecciones con intensidades ligeras y moderadas. Prevaleció el estado clínico asintomático con muy poca morbilidad específica, siendo el dolor abdominal y la diarrea no disentérica los síntomas más frecuentes. Se caracterizó a la provincia de Las Tunas como una zona hipoendémica de geohelmintos intestinales y se recomienda identificar los determinantes de la infección por estos parásitos en la población escolar

  16. LA GUITARRA DE CONCIERTO COMO EXPRESIÓN DE LA CULTURA EN LAS TUNAS. ESTUDIO DEL PERÍODO 1990- 2014

    Directory of Open Access Journals (Sweden)

    Tatiana Tamayo Talavera

    2015-01-01

    Full Text Available Resumen El presente estudio forma parte de una investigación que se encuentra en proceso, sobre el devenir de la guitarra de concierto en el municipio Las Tunas desde el año 1990 hasta el 2014. La guitarra de concierto se cultiva en este territorio desde la segunda mitad siglo XX, generándose a partir del período citado un proceso de desarrollo paulatino en torno a sus expresiones. Sin embargo, aún no se han logrado niveles masivos de aceptación de la guitarra de concierto por parte de la sociedad tunera, lo cual conduce a realizar un análisis sobre las causas de su situación actual desde la definición de cultura. Por otro lado, quedarán identificadas las deficiencias que en la actualidad limitan sus contribuciones al desarrollo cultural del territorio. ABSTRACT This study is part of a research which is still in process, about the development of the concert guitar in Las Tunas municipality in 1990-2014 period. The concert guitar has been cultivated in this territory since the beginning of XX century, and it has been generated a development process around its expressions in the selected period. However, Las Tunas’ society hasn’t accepted these musical expressions in massive levels, which takes to make an analysis of the causes of its actual situation from culture’s definition. On the other hand, the problems that avoid the contributions of the concert guitar to the culture development of Las Tunas’ territory will be also identified.

  17. Conteo CD4+ y carga viral en la evolución clínica de pacientes con vih-sida en Las Tunas

    Directory of Open Access Journals (Sweden)

    Jenny Hernández Betancourt

    2015-11-01

    Full Text Available La comprensión de la inmunopatogénesis de la infección por vih-sida es un requisito para mejorar racionalmente los tratamientos disponibles y desarrollar inmunoterapias y vacunas. Se estudiaron 314 sujetos con diagnóstico confirmado de esta infección en la provincia de Las Tunas, en el periodo comprendido entre enero de 1986 hasta diciembre de 2011, según los criterios establecidos en el programa cubano para el control de la enfermedad. Se calcularon las frecuencias para las variables: sexo, municipio de residencia, estadio de la enfermedad, progresión clínica, enfermedades coexistentes, conteo de CD4, carga viral y protocolo de tratamiento. El sexo masculino predominó en la muestra de estudio (79,4% y en los progresores rápidos (77,3%. El tiempo medio estimado de progresión a sida fue de 3,6 años. Los pacientes con más de diez años de infectados tuvieron niveles sanguíneos por encima de 500 células CD4+/µL. Los dos esquemas de tratamiento antirretroviral más empleados fueron Zidovudina – Lamivudina – Nevirapina y Estavudina - Lamivudina – Nevirapina, con cifras aceptables para las cifras de linfocitos T CD4+ y la viremia. Más de la cuarta parte de los portadores asintomáticos mantuvieron niveles de células T CD4+ en valores normales, proporción que se reduce a una quinta parte en los enfermos de sida. La muestra estudiada de sujetos infectados por el vih-sida de la provincia de Las Tunas tiene características similares a lo reportado para la epidemia en Cuba.

  18. Caracterización del mieloma múltiple y de su componente monoclonal durante 14 años en Las Tunas

    Directory of Open Access Journals (Sweden)

    Olga Lina Pupo Rodríguez

    2015-11-01

    Full Text Available El mieloma múltiple es una neoplasia de células plasmáticas que representa el 10% de las enfermedades hematológicas malignas. La mayoría de los pacientes presentan síntomas, signos y trastornos de laboratorio sugestivos de enfermedad activa, incluyendo lesiones osteolíticas activas, hipercalcemia, anemia y fallo renal. Para el diagnóstico de esta enfermedad hay que tener en cuenta las manifestaciones clínicas, los estudios radiológicos, pruebas especiales como citología celular y exámenes de laboratorio como la electroforesis de proteína en suero y orina, inmunoelectroforesis, cuantificación de inmunoglobulinas y proteína de Bence-Jones. Se realizó un estudio con el objetivo de evaluar las características de las variables inmunológicas mediante la determinación de inmunoglobulinas (inmunodifusión radial simple o inmunoturbidimetría en un analizador automático HITACHI, proteínas totales (método de Biuret o en el analizador HITACHI y electroforesis de proteínas en suero y orina en pacientes remitidos de la consulta de Hematología del Hospital “Ernesto Guevara de la Serna” de Las Tunas, con el diagnóstico de mieloma múltiple. La clase IgG fue la predominante en los 127 casos estudiados (73,3%, seguido de la IgA (16,5% y de cadenas ligeras (9,5%. Se han registrado dos casos de macroglobulinemia de Waldeström. En correspondencia con lo reportado en la literatura, en la provincia de Las Tunas el isotipo más frecuente en pacientes afectados por mieloma múltiple es de clase IgG.

  19. The Atlantic Multidecadal Oscillation in models and observations

    NARCIS (Netherlands)

    Frankcombe, L.M.

    2010-01-01

    We use a simplified model of the North Atlantic ocean to study the Atlantic Multidecadal Oscillation (AMO), which is a low-frequency variation found in sea surface temperatures (SST) over the North Atlantic ocean. A mechanism for the AMO has previously been described; here we study the excitation of

  20. 77 FR 70551 - Highly Migratory Species; Atlantic Shark Management Measures

    Science.gov (United States)

    2012-11-26

    ... Part 635 Highly Migratory Species; Atlantic Shark Management Measures; Proposed Rule #0;#0;Federal...; Atlantic Shark Management Measures AGENCY: National Marine Fisheries Service (NMFS), National Oceanic and... shark stock assessments that were completed from 2009 to 2012. The assessments for Atlantic blacknose...