WorldWideScience

Sample records for heller crustacea decapoda

  1. Crescimento relativo do camarão canela Macrobrachium amazonicum (Heller (Crustacea, Decapoda, Palaemonidae em viveiros Relative growth of Amazon river prawn Macrobrachium amazonicum (Heller (Crustacea, Decapoda, Palaemonidae in earthen ponds

    Directory of Open Access Journals (Sweden)

    Patrícia M.C. Moraes-Riodades

    2002-12-01

    Full Text Available Some morphometric relationships in Macrobrachium amazonicum (Heller, 1862 reared in earthen ponds were studied. A total of 239 individuals were collected, sexed and sorted to juvenile or adult. Total length (Lt, post-orbital length (Lpo, carapace length (Lcp and queliped length (Lql were measured. The relationships Lt/Lpo, Lpo/Lcp and Lt/Lcp are the same for juveniles, males and females, indicating unchanged growth pattern during post-larval ontogenetic development. While Lt/Lpo showed isometric growth, Lpo/Lcp and Lt/Lcp showed negative allometry. On the other hand, for the Lql/Lcp relationship, juveniles showed isometric growth, females slight positive allometry and males a strong positive allometry. It suggests that the importance of chelipeds may be different in these groups. Quelipeds play important role on food capture and on agonistic, social and reproductive behavior. Therefore, inter and intraspecific interactions may change during prawn growth, even after morphological

  2. (CaIman) (Crustacea, Decapoda, Branchiura)

    African Journals Online (AJOL)

    1994-01-25

    Jan 25, 1994 ... (Crustacea, Decapoda, Branchiura), from industrial, mine and sewage-polluted .... and sex dependency in the bioaccumulation of copper were also examined. ...... factors. which include changes in salinity. water hardness. R eprodu ... lOry mechanism breaks down, resulting in an increase in copper levels ...

  3. Ecomorfologia de caranguejos e siris (Crustacea Decapoda Brachyura) de ecossistemas costeiros

    OpenAIRE

    Marochi, Murilo Zanetti

    2012-01-01

    Resumo: Ecomorfologia de caranguejos e siris (CRUSTACEA DECAPODA BRACHYURA) de ecossistemas costeiros. O presente estudo objetivou avaliar se diferentes espécies de Brachyura possuem padrões ecomorfológicos em comum ligados ao habitat em que estão inseridas. Foram analisados 528 exemplares pertencentes a 24 espécies e provenientes dos seguintes ecossistemas costeiros: manguezal, costão rochoso, praia arenosa, bentopelagial e mar aberto. De todos os exemplares foram mensurada...

  4. First record of Puerulus mesodontus Chan, Ma & Chu, 2013 (Crustacea, Decapoda, Achelata, Palinuridae) from south of Java, Indonesia.

    Science.gov (United States)

    Wardiatno, Yusli; Hakim, Agus Alim; Mashar, Ali; Butet, Nurlisa Alias; Adrianto, Luky; Farajallah, Achmad

    2016-01-01

    Three specimens of Puerulus mesodontus Chan, Ma & Chu, 2013 (Crustacea, Decapoda, Achelata, Palinuridae) were collected from Palabuhanratu Bay, southern Java, Indonesia. There is no previous record on the presence of the species in Indonesia. This finding represents the first record of this species in Java, Indonesia, and confirms that the species is present in the Indian Ocean. The morphological characters of the species are described. This paper contains a new distribution record of a lobster species from Indonesian waters.

  5. Evolution and phylogeny of the mud shrimps (Crustacea: Decapoda) revealed from complete mitochondrial genomes.

    Science.gov (United States)

    Lin, Feng-Jiau; Liu, Yuan; Sha, Zhongli; Tsang, Ling Ming; Chu, Ka Hou; Chan, Tin-Yam; Liu, Ruiyu; Cui, Zhaoxia

    2012-11-16

    The evolutionary history and relationships of the mud shrimps (Crustacea: Decapoda: Gebiidea and Axiidea) are contentious, with previous attempts revealing mixed results. The mud shrimps were once classified in the infraorder Thalassinidea. Recent molecular phylogenetic analyses, however, suggest separation of the group into two individual infraorders, Gebiidea and Axiidea. Mitochondrial (mt) genome sequence and structure can be especially powerful in resolving higher systematic relationships that may offer new insights into the phylogeny of the mud shrimps and the other decapod infraorders, and test the hypothesis of dividing the mud shrimps into two infraorders. We present the complete mitochondrial genome sequences of five mud shrimps, Austinogebia edulis, Upogebia major, Thalassina kelanang (Gebiidea), Nihonotrypaea thermophilus and Neaxius glyptocercus (Axiidea). All five genomes encode a standard set of 13 protein-coding genes, two ribosomal RNA genes, 22 transfer RNA genes and a putative control region. Except for T. kelanang, mud shrimp mitochondrial genomes exhibited rearrangements and novel patterns compared to the pancrustacean ground pattern. Each of the two Gebiidea species (A. edulis and U. major) and two Axiidea species (N. glyptocercus and N. thermophiles) share unique gene order specific to their infraorders and analyses further suggest these two derived gene orders have evolved independently. Phylogenetic analyses based on the concatenated nucleotide and amino acid sequences of 13 protein-coding genes indicate the possible polyphyly of mud shrimps, supporting the division of the group into two infraorders. However, the infraordinal relationships among the Gebiidea and Axiidea, and other reptants are poorly resolved. The inclusion of mt genome from more taxa, in particular the reptant infraorders Polychelida and Glypheidea is required in further analysis. Phylogenetic analyses on the mt genome sequences and the distinct gene orders provide further

  6. The little shrimp that could: phylogeography of the circumtropical Stenopus hispidus (Crustacea: Decapoda), reveals divergent Atlantic and Pacific lineages

    Science.gov (United States)

    Iacchei, Matthew; Coleman, Richard R.; Gaither, Michelle R.; Browne, William E.; Bowen, Brian W.; Toonen, Robert J.

    2018-01-01

    The banded coral shrimp, Stenopus hispidus (Crustacea: Decapoda: Stenopodidea) is a popular marine ornamental species with a circumtropical distribution. The planktonic larval stage lasts ∼120–253 days, indicating considerable dispersal potential, but few studies have investigated genetic connectivity on a global scale in marine invertebrates. To resolve patterns of divergence and phylogeography of S. hispidus, we surveyed 525 bp of mitochondrial cytochrome c oxidase subunit I (COI) from 198 individuals sampled at 10 locations across ∼27,000 km of the species range. Phylogenetic analyses reveal that S. hispidus has a Western Atlantic lineage and a widely distributed Indo-Pacific lineage, separated by sequence divergence of 2.1%. Genetic diversity is much higher in the Western Atlantic (h = 0.929; π = 0.004) relative to the Indo-Pacific (h = 0.105; π Indo-Pacific population expanded more recently (95% HPD (highest posterior density) = 60,000–400,000 yr) than the Western Atlantic population (95% HPD = 300,000–760,000 yr). Divergence of the Western Atlantic and Pacific lineages is estimated at 710,000–1.8 million years ago, which does not readily align with commonly implicated colonization events between the ocean basins. The estimated age of populations contradicts the prevailing dispersal route for tropical marine biodiversity (Indo-Pacific to Atlantic) with the oldest and most diverse population in the Atlantic, and a recent population expansion with a single common haplotype shared throughout the vast Indian and Pacific oceans. In contrast to the circumtropical fishes, this diminutive reef shrimp challenges our understanding of conventional dispersal capabilities of marine species. PMID:29527409

  7. Comparative Ultrastructure and Carbohydrate Composition of Gastroliths from Astacidae, Cambaridae and Parastacidae Freshwater Crayfish (Crustacea, Decapoda

    Directory of Open Access Journals (Sweden)

    Gérard Alcaraz

    2012-12-01

    Full Text Available Crustaceans have to cyclically replace their rigid exoskeleton in order to grow. Most of them harden this skeleton by a calcification process. Some decapods (land crabs, lobsters and crayfish elaborate calcium storage structures as a reservoir of calcium ions in their stomach wall, as so-called gastroliths. For a better understanding of the cyclic elaboration of these calcium deposits, we studied the ultrastructure of gastroliths from freshwater crayfish by using a combination of microscopic and physical techniques. Because sugars are also molecules putatively involved in the elaboration process of these biomineralizations, we also determined their carbohydrate composition. This study was performed in a comparative perspective on crayfish species belonging to the infra-order Astacidea (Decapoda, Malacostraca: three species from the Astacoidea superfamily and one species from the Parastacoidea superfamily. We observed that all the gastroliths exhibit a similar dense network of protein-chitin fibers, from macro- to nanoscale, within which calcium is precipitated as amorphous calcium carbonate. Nevertheless, they are not very similar at the molecular level, notably as regards their carbohydrate composition. Besides glucosamine, the basic carbohydrate component of chitin, we evidenced the presence of other sugars, some of which are species-specific like rhamnose and galacturonic acid whereas xylose and mannose could be linked to proteoglycan components.

  8. CRUSTACEA: DECAPODA: THALASSINIDEA

    African Journals Online (AJOL)

    S. Breeding and growth in C. kraussi is compared with that in other known ... sandy areas at many estuary mouths (Day et al. 1952 ... -Present address: Department of Biological Sciences, University of Natal, King George V Avenue, Durban.

  9. Thalassinidea, Decapoda, Crustacea

    African Journals Online (AJOL)

    1986-07-23

    Jul 23, 1986 ... winter than in summer and a similar respiration rate (at a given temperature) ... Swartkops estuary and they lasted a further 2-4 days. ..... from the upper and lower reaches of the Swartkops estuary. °c 0/00 S. S:SUMMER. 500.

  10. (Ortmann) (Decapoda, Crustacea)

    African Journals Online (AJOL)

    1987-03-13

    Mar 13, 1987 ... duration and current velocity) of the populations to the flow of water ... The mud prawn Upogebia africana (Ortmann) is a filter ... three sources namely, treated sewage released into the ... indicating the positions of the sampling sites for macrobenthos (1 - 40) ..... punctata feeding on a variety of marine algae.

  11. New primers for amplification of cytochrome c oxidase subunit I barcode region designed for species of Decapoda (Crustacea

    Directory of Open Access Journals (Sweden)

    Fernando L. Mantelatto

    Full Text Available Abstract We designed 14 new primers for amplification of the COI barcode region of decapod crustacean species. We tested, with high level of success, the generation of ~ 640 ± 49 base-pair sequences in selected groups of decapods (hermit crabs, squat lobsters, marine and freshwater crabs and shrimps, encompassing representatives of 27 genera of 15 families, 11 of Pleocyemata (Anomura, Brachyura, and Caridea and 4 of Dendrobranchiata. Based on the results we expect the applicability of these primers for several studies with different taxa within Decapoda.

  12. Primitive decapods from the deep sea: first record of blind lobsters (Crustacea: Decapoda: Polychelidae in northeastern Brazil

    Directory of Open Access Journals (Sweden)

    Luis Ernesto Arruda Bezerra

    Full Text Available ABSTRACT We report herein the occurrence of the infraorder Polychelida in Potiguar Basin, northeastern Brazil. Specimens were collected by the project "Avaliação da Biota Bentônica e Planctônica na porção offshore das Bacias Potiguar e Ceará", developed by the Brazilian Oil Company (PETROBRAS. Three species were recorded for the first time in this region: Pentacheles validus A. Milne-Edwards, 1880, Polycheles typhlops Heller, 1862, and Stereomastis sculpta (Smith, 1880 at 2000 m, 400 m and 2057 m depth, respectively. The Brazilian deep-sea floor remains poorly known, but progress has been made as a result of collections obtained by oceanographic expeditions and research projects developed by PETROBRAS in Campos Basin (Rio de Janeiro and Potiguar Basin (Rio Grande do Norte, expanding the knowledge of the distribution area of Polychelidae in Brazilian deep sea waters.

  13. Feeding ecology of non-native Siberian prawns, Palaemon modestus (Heller, 1862) (Decapoda, Palaemonidae), in the lower Snake River, Washington, U.S.A.

    Science.gov (United States)

    Tiffan, Kenneth F.; Hurst, William

    2016-01-01

    We used both stomach content and stable isotope analyses to describe the feeding ecology of Siberian prawns Palaemon modestus (Heller, 1862), a non-native caridean shrimp that is a relatively recent invader of the lower Snake River. Based on identifiable prey in stomachs, the opossum shrimp Neomysis mercedis Holmes, 1896 comprised up to 34-55% (by weight) of diets of juvenile to adult P. modestus, which showed little seasonal variation. Other predominant items/taxa consumed included detritus, amphipods, dipteran larvae, and oligochaetes. Stable isotope analysis supported diet results and also suggested that much of the food consumed by P. modestus that was not identifiable came from benthic sources — predominantly invertebrates of lower trophic levels and detritus. Palaemon modestus consumption of N. mercedis may pose a competitive threat to juvenile salmon and resident fishes which also rely heavily on that prey.

  14. Biologia e pesca do camarão sete-barbas Xiphopenaeus kroyeri (Heller (Crustacea, Penaeidae, na Armação do Itapocoroy, Penha, Santa Catarina, Brasil Fishery and Biology of the sea-bob-shrimp Xiphopenaeus kroyeri (Heller (Crustacea, Penaeidae, at Armação do Itapocoroy, Penha, Santa Catarina, Brazil

    Directory of Open Access Journals (Sweden)

    Joaquim O. Branco

    2005-12-01

    Full Text Available A pesca artesanal do camarão sete-barbas é denominada "pesca de sol a sol" e realizada em grande escala no litoral brasileiro, apresentando uma significativa importância econômica, histórica, social e cultural. Atualmente, a pesca desse camarão é considerada a de maior interesse econômico e o segundo recurso pesqueiro nas regiões Sudeste-Sul do Brasil. Com o objetivo de estudar a biologia e pesca do camarão sete-barbas na Armação do Itapocoroy, Penha (26º40'-26º47'S e 48º36'-48º38'W, durante o período de agosto de 1996 a julho de 2003 foram realizadas coletas mensais com 30 minutos de duração. Foram registrados o número e a biomassa dos exemplares por arrasto, e entre anos de 1996-1997 e 1999-2001, também foram anotados o sexo, o comprimento e peso total, estádio de maturação. Além dessas informações, entre agosto de 1998 a julho de 1999 foi analisado a dieta natural da espécie. X. kroyeri (Heller, 1862 apresentou comprimento total variando entre 3,0 e 16,0 cm e flutuações sazonais na abundância e biomassa, com as maiores taxas de captura ocorreram durante os meses de verão e outono. A relação peso/comprimento indicou um padrão de crescimento tendendo ao isométrico com tamanho de primeira maturação entre 7,3 a 7,9 cm, alcançados em seis meses de idade. A espécie apresentou dois picos de desova ao longo do ano, sendo que a pesca artesanal vem atuando com maior intensidade sobre o estoque adulto. O espectro trófico foi composto por 30 itens, sendo que os Gammaridae, areia, outros Crustacea e matéria orgânica os elementos básicos na dieta da espécie. Em média, 67,82 barcos atuam durante oito meses por ano na pesca do camarão sete-barbas na Armação do Itapocoroy, podendo capturar em torno de 170 toneladas/ano.The artisanal fishery of the sea-bob-shrimp is known as "sun to sun fishery" and is developed in large scale along the Brazilian coast, playing a significant economic, historical, social and

  15. Occurrence of Macrobrachium amazonicum (Heller (Decapoda, Palaemonidae in Leopoldo's inlet (Ressaco do Leopoldo, upper Paraná River, Porto Rico, Paraná, Brazil

    Directory of Open Access Journals (Sweden)

    Andréa Bialetzki

    1997-01-01

    Full Text Available Studies on the occurrence, temporal distribution and nychthemeral variation of Macrobrachium amazonicum (Heller, 1862 were undertaken in Leopoldo's Inlet, upper Paraná River, Porto Rico, Paraná, Brazil. Seventeen thousand and sixty specimens (11,786 larvae and 5,274 juveniles were captured with a conicalcylindrical plankton net of mesh 0.5mm in monthly samples between February 1991 and February 1992. Results show that the greatest densities of larvae (301.83 larvae/10m³ and juveniles (168.8/10m³ of this species were caught in December 1991. Largest captures were made during the night. With regard to abiotic factors water temperature ranged from 20º to 30ºC, pH ranged from 5.66 to 7.37 and electric conductivity ranged from 51.83 to 65.33µS/cm. Relationship between the density of larvae and juveniles and abiotic factors was calculated by the Principal Components Analysis (PCA which revealed the influence of some limnological variables especially on the distribution of larvae.

  16. The genus Hippolyte Leach, 1814 (Crustacea: Decapoda: Caridea: Hippolytidae) in the East Atlantic Ocean and the Mediterranean Sea, with a checklist of all species in the genus

    NARCIS (Netherlands)

    d'Udekem d'Acoz, C.

    1996-01-01

    The genus Hippolyte Leach in the East Atlantic and the Mediterranean is revised and a list of the world species is given. Eleven species occur in the area studied: H. coerulescens (Fabricius), H. garciarasoi spec. nov., H. inermis Leach, H. lagarderei d'Udekem d'Acoz, H. leptocerus (Heller), H.

  17. Significance of the sexual openings and supplementary structures on the phylogeny of brachyuran crabs (Crustacea, Decapoda, Brachyura), with new nomina for higher-ranked podotreme taxa.

    Science.gov (United States)

    Guinot, Danièle; Tavares, Marcos; Castro, Peter

    2013-01-01

    it is lost in all other raninoid extant members. New evidence shows that the abdominal holding was an early occurrence for a brachyuran crab. The Raninoidea, sister to Palaeocorystoidea, is characterised by gymnopleurity, a condition that results from the lifting of the carapace and thus the exposure of several pleurites. The narrowing of the body and thoracic sternum, almost certainly associated with their burrowing behaviour, is a diagnostic feature of raninoid evolution, in contrast to the widening observed in the remaining Brachyura. The monophyly of Heterotremata is discussed. Although the correct assignment of the coxal male gonopore and sternal female gonopore (vulva) at the base of Decapoda and Eubrachyura, respectively, left no synapomorphies to support the Heterotremata, the group nevertheless should be regarded as the sister group to Thoracotremata. The controversial monophyly of Podotremata is discussed and arguments are presented against the suppression of this taxon. The distinction of Homoloidia from Dromioidia is argued, and a classification of Podotremata, which considers the fossil record whenever possible, is presented. The earliest brachyurans are re-examined, and a new interpretation of the phylogeny of several basal eubrachyuran groups (Dorippoidea, Inachoididae, Palicoidea, Retroplumoidea) is proposed. Stenorhynchus shares a number of characters with the Inachoididae that differentiate them from Inachidae, and also has some distinctive features that warrants its assignment to a separate inachoidid subfamily, Stenorhynchinae, which is resurrected. The concealment strategies among Brachyura are documented and discussed. Podotremes use carrying behaviour, often combined with burying and concealment under substrates, whereas living within a host, burying, and decoration are used by heterotremes, burrowing being essentially a thoracotreme strategy. (ABSTRACT TRUNCATED)

  18. Crustacea; Talitridae

    African Journals Online (AJOL)

    Distribution of the amphipod, Talorchestia capensis (Crustacea; Talitridae) has been studied in a dune-beach system. The majority of amphipods occurred in dune slacks with fewer on the beach. No zonation of size classes existed, both juveniles and adults occurring throughout the slack. Amphipods were concentrated in ...

  19. Laparoscopic Heller's cardiomyotomy.

    LENUS (Irish Health Repository)

    Doodnath, R

    2012-02-01

    Achalasia is a rare motility disorder which causes failure of relaxation of the lower oesophageal sphincter (LES) and is thought to affect 0.31\\/100,000 children per year in Ireland. The classic presentation is difficulty swallowing and vomiting undigested food, and children can often present with chest pain. In some instances, these symptoms can lead to considerable weight loss. In this report, we present 2 cases of patients with achalasia who have also been the first 2 cases of laparoscopic Heller\\'s cardiomyotomy performed in children in the Republic of Ireland.

  20. Heller Myotomy Versus Heller Myotomy With Dor Fundoplication for Achalasia

    Science.gov (United States)

    Richards, William O.; Torquati, Alfonso; Holzman, Michael D.; Khaitan, Leena; Byrne, Daniel; Lutfi, Rami; Sharp, Kenneth W.

    2004-01-01

    Objective: We sought to determine the impact of the addition of Dor fundoplication on the incidence of postoperative gastroesophageal reflux (GER) after Heller myotomy. Summary Background Data: Based only on case series, many surgeons believe that an antireflux procedure should be added to the Heller myotomy. However, no prospective randomized data support this approach. Patients and Methods: In this prospective, randomized, double-blind, institutional review board-approved clinical trial, patients with achalasia were assigned to undergo Heller myotomy or Heller myotomy plus Dor fundoplication. Patients were studied via 24-hour pH study and manometry at 6 months postoperatively. Pathologic GER was defined as distal esophageal time acid exposure time greater than 4.2% per 24-hour period. The outcome variables were analyzed on an intention-to-treat basis. Results: Forty-three patients were enrolled. There were no differences in the baseline characteristics between study groups. Pathologic GER occurred in 10 of 21 patients (47.6%) after Heller and in 2 of 22 patients (9.1%) after Heller plus Dor (P = 0.005). Heller plus Dor was associated with a significant reduction in the risk of GER (relative risk 0.11; 95% confidence interval 0.02–0.59; P = 0.01). Median distal esophageal acid exposure time was lower in the Heller plus Dor (0.4%; range, 0–16.7) compared with the Heller group (4.9%; range, 0.1–43.6; P = 0.001). No significant difference in surgical outcome between the 2 techniques with respect to postoperative lower-esophageal sphincter pressure or postoperative dysphagia score was observed. Conclusions: Heller Myotomy plus Dor Fundoplication was superior to Heller myotomy alone in regard to the incidence of postoperative GER. PMID:15319712

  1. A Conversation with Adam Heller

    OpenAIRE

    Heller, A; Cairns, EJ

    2015-01-01

    © 2015 by Annual Reviews. All rights reserved. Adam Heller, Ernest Cockrell Sr. Chair in Engineering Emeritus of the John J. McKetta Department of Chemical Engineering at The University of Texas at Austin, recalls his childhood in the Holocaust and his contributions to science and technology that earned him the US National Medal of Technology and Innovation in a conversation with Elton J. Cairns, Professor of Chemical and Biomolecular Engineering at the University of California, Berkeley. Dr....

  2. A Conversation with Adam Heller.

    Science.gov (United States)

    Heller, Adam; Cairns, Elton J

    2015-01-01

    Adam Heller, Ernest Cockrell Sr. Chair in Engineering Emeritus of the John J. McKetta Department of Chemical Engineering at The University of Texas at Austin, recalls his childhood in the Holocaust and his contributions to science and technology that earned him the US National Medal of Technology and Innovation in a conversation with Elton J. Cairns, Professor of Chemical and Biomolecular Engineering at the University of California, Berkeley. Dr. Heller, born in 1933, describes the enslavement of his father by Hungarians in 1942; the confiscation of his family's home, business, and all its belongings in 1944; and his incarceration in a brick factory with 18,000 Jews who were shipped by the Hungarians to be gassed by Germans in Auschwitz. Dr. Heller and his immediate family survived the Holocaust and arrived in Israel in 1945. He studied under Ernst David Bergmann at the Hebrew University, and then worked at Bell Laboratories and GTE Laboratories, where he headed Bell Lab's Electronic Materials Research Department. At GTE Laboratories, he built in 1966 the first neodymium liquid lasers and in 1973 with Jim Auborn conceived and engineered the lithium thionyl chloride battery, one of the first to be manufactured lithium batteries, which is still in use. After joining the faculty of engineering of The University of Texas at Austin, he cofounded with his son Ephraim Heller TheraSense, now a major part of Abbott Diabetes Care, which produced a microcoulometer that made the monitoring of glucose painless by accurately measuring the blood glucose concentration in 300 nL of blood. He also describes the electrical wiring of enzymes, the basis for Abbott's state-of-the-art continuous glucose monitoring system. He discusses his perspective of reducing the risk of catastrophic global warming in a wealth-accumulating, more-energy-consuming world and provides advice for students entering careers in science or engineering.

  3. First Zoeal Stage of Camptandrium sexdentatum (Crustacea: Decapoda: Camptandriidae

    Directory of Open Access Journals (Sweden)

    Park, Jay Hee

    2014-10-01

    Full Text Available The first zoea of Camptandrium sexdentatum is described for the first time with a digital image of live zoeas. An ovigerous crab of C. sexdentatum was collected at the muddy sand flat in Namhaedo Island on 2 June 2012 and hatched in the laboratory on 6 June 2012. In Camptandriidae, the first zoea of C. sexdentatum is distinguished from the first zoeas of Cleistostoma dilatatum and Deiratonotus cristatum by having no dorsal and lateral carapace spines, an abdomen significantly broadened posteriorly, and a subovoid telson without forks. Especially, the finding of a subovoid telson without forks is the first report in brachyuran zoeas.

  4. A new alpheid shrimp (Crustacea: Decapoda: Alpheidae) from South Vietnam

    NARCIS (Netherlands)

    Nguyên Van Xuân,

    2001-01-01

    A new alpheid shrimp, Thuylamea camelus gen. nov. & spec. nov., from Dong Hoa, a coastal community of Can Gio district, and northwest of Vung Tau (Cap St. Jacques), Vietnam, is described and illustrated. The new genus appears not to be closely related to any of the previously described genera. It

  5. Galatheoid squat lobsters (Crustacea: Decapoda: Anomura from Korean waters

    Directory of Open Access Journals (Sweden)

    Jung Nyun Kim

    2016-10-01

    Full Text Available Abstract Ten species of Galatheoidea (squat lobsters, belonging to two families, were collected in the Korean exclusive economic zone: Galathea balssi Miyake and Baba, 1964, Galathea orientalis Stimpson, 1858, Galathea pubescens Stimpson, 1858, and Galathea rubromaculata Miyake and Baba, 1967 belonging to Galatheidae; Bathymunida brevirostris Yokoya, 1933, Cervimunida princeps Benedict, 1902, Munida caesura Macpherson and Baba, 1993, Munida japonica Stimpson, 1858, Munida pherusa Macpherson and Baba, 1993, and Paramunida scabra (Henderson, 1885 belonging to Munididae. The present study comprises the morphological description of these ten species, including drawings and color photographs, a brief review of their regional records, and a key for their identification. Although all species are common in Japanese waters, G. balssi, G. rubromaculata, B. brevirostris, C. princeps, M. caesura, and M. pherusa are new to Korean marine fauna.

  6. The Crustacea Decapoda Macrura (the Alpheidae excepted) of Easter Island

    NARCIS (Netherlands)

    Holthuis, L.B.

    1972-01-01

    So far the Crustacean fauna of Easter Island has received but very little attention. In most early narratives of expeditions visiting the island no mention is made of any Crustacean. Behrens (1908: 135) who accompanied Jacob Roggeveen on the voyage during which, in 1722, the island was discovered,

  7. Revisiting Regression in Autism: Heller's "Dementia Infantilis"

    Science.gov (United States)

    Westphal, Alexander; Schelinski, Stefanie; Volkmar, Fred; Pelphrey, Kevin

    2013-01-01

    Theodor Heller first described a severe regression of adaptive function in normally developing children, something he termed dementia infantilis, over one 100 years ago. Dementia infantilis is most closely related to the modern diagnosis, childhood disintegrative disorder. We translate Heller's paper, Uber Dementia Infantilis, and discuss…

  8. Natural Diet of Callinectes ornatus Ordway, 1863 (Decapoda, Portunidae in the Itapocoroy Inlet, Penha, SC, Brazil

    Directory of Open Access Journals (Sweden)

    Joaquim Olinto Branco

    2002-03-01

    Full Text Available From January to December 1995, 332 individuals of the Callinectes ornatus species were collected from the Itapocoroy inlet in Penha, Sta. Catarina, Brazil to study its natural diet and the seasonal variations of diet. Results showed a diversified trophic spectrum with a generalized dietary strategy comprising the algae, macrophyta, foraminiferida, mollusca, polychaeta, crustacea, echinodermata, Osteichthyes and NIOM (Nonidentified Organic Matter groups.Alimentação natural de Callinectes ornatus Ordway, 1863 (Decapoda, Portunidae na Armação do Itapocoroy, Penha, SC - Brasil. No período de janeiro a dezembro de 1995, foram coletados 332 indivíduos de Callinectes ornatus, procedentes da Armação do Itapocoroy (Penha, SC. Foi estudada a alimentação natural da espécie e as variações sazonais da dieta. Os resultados mostram um espectro trófico diversificado, com estratégia alimentar generalista, sendo Algas, Macrófitas, Foraminiferida, Mollusca, Polychaeta, Crustacea, Echinodermata, Osteichthyes e matéria orgânica não identificada, os grupos que compõem sua dieta.

  9. MONITORAMENTO DAS PUBLICAÇÕES RELACIONADAS AO CAMARÃO SETE BARBAS Xiphopenaeus kroyeri (Heller, 1862

    Directory of Open Access Journals (Sweden)

    Danilo Francisco Corrêa Lopes

    2013-03-01

    Full Text Available Integrante da ordem Decapoda (Latreille, 1802 subordem Dendrobranchiata (Bate, 1888 e família Penaeidae (Rafinesque, 1815 o camarão sete barbas, Xiphopenaeus kroyeri (Heller, 1862, se distribui no Oceano Pacífico Oriental, desde a cidade de Sinaloa no México até a cidade de Paita no Peru e, no Atlântico Ocidental, desde a Virgínia (Estados Unidos até o Rio Grande do Sul, Brasil. Diversos pesquisadores brasileiros e de outros países vem desenvolvendo trabalhos a respeito da dinâmica populacional, biologia reprodutiva, caracterização da pesca, distribuição espaço-temporal, morfometria, proporção sexual, genética e outras demais áreas de interesse desta espécie.  Monitorar toda produção literária voltada ao Xiphopenaeus kroyeri (Heller, 1862 presente no banco de publicações inseridos no site dos periódicos da CAPES e nas bases do Scopus e da Scientific Electronic Library Online (Scielo, a fim de contabilizar o número de publicações, os principais países que desenvolvem trabalhos, os idiomas, as principais revistas utilizadas pelos autores que desenvolvem pesquisas relacionadas a esta espécie. Espera-se que o desenvolvimento deste trabalho se torne um novo incentivo para os pesquisadores brasileiros, para desenvolver novos estudos direcionados ao camarão sete barbas Xiphopenaeus kroyeri (Heller, 1862.

  10. The calibrated laparoscopic Heller myotomy with fundoplication.

    Science.gov (United States)

    Di Martino, Natale; Marano, Luigi; Torelli, Francesco; Schettino, Michele; Porfidia, Raffaele; Reda, Gianmarco; Grassia, Michele; Petrillo, Marianna; Braccio, Bartolomeo

    2013-01-01

    Esophageal achalasia is the most common primary esophageal motor disorder. Laparoscopic Heller's myotomy combined with fundoplication represents the treatment of choice for this disease, achieving good results in about 90% of patients. However, about 10% of treated patients refer persistent or recurrent dysphagia. Many Authors showed that this failure rate is related to inadequate myotomy. To verify, from experimental to clinical study, the modifications induced by Heller's myotomy of the esophago- gastric junction on LES pressure (LES-P profile, using a computerized manometric system. From 2002 to 2010 105 patients with achalasia underwent laparoscopic calibrated Heller myotomy followed by antireflux surgery. The calibrated Heller myotomy was extended for at least 2.5 cm on the esophagus and for 3 cm on the gastric side. Each step was evaluated by intraoperative manometry. Moreover, intraoperative manometry and endoscopy were used to calibrate the fundoplication. The preoperative mean LES-P was 37.73 ± 12.21. After esophageal and gastric myotomy the mean pressure drop was 21.3% and 91.9%, respectively. No mortality was reported. Laparoscopic calibrated Heller myotomy with fundoplication achieves a good outcome in the surgical treatment of achalasia. The use of intraoperative manometry enables an adequate calibration of myotomy, being effective in the evaluation of the complete pressure drop, avoiding too long esophageal myotomy and, especially, too short gastric myotomy, that may be the cause of surgical failure.

  11. Reoperative Heller myotomy: more pain, less gain.

    Science.gov (United States)

    Wood, Thomas W; Ross, Sharona B; Ryan, Carrie E; Bowman, Ty A; Jacobi, Benjamin L; Konstantinidis, Michael G; Rosemurgy, Alexander S

    2015-06-01

    Heller myotomy provides durable and effective treatment of achalasia. Due to recurrence or persistence of symptoms, a small subset of patients seeks reoperation. This study was undertaken to determine if reoperative Heller myotomy provides salutary amelioration of symptoms. 609 patients undergoing laparoscopic Heller myotomy between 1992 to 2013 were prospectively followed; 38 underwent reoperative myotomy. Patients graded their symptom frequency and severity before and after myotomy on a Likert scale. Median data are reported. Patients undergoing reoperative myotomy, when compared to those undergoing their first myotomy, experienced a higher conversion rate to an "open" myotomy (8% vs 1%, P myotomy led to improvement in symptoms, but the magnitude of improvement in symptoms (e.g., dysphagia, choking, and coughing) was less than for patients undergoing their first myotomy (all P Heller myotomy were less likely to report symptoms occurring once per month or less (83% vs 56%, P myotomy note improvement in symptoms, although to a lesser extent than patients undergoing their first myotomy. Patients undergoing reoperative Heller myotomy can expect to experience less improvement of symptoms, denoting the importance of the first myotomy.

  12. Laparoscopic Heller Myotomy for Achalasia Technical Aspects.

    Science.gov (United States)

    Schlottmann, Francisco; Allaix, Marco E; Patti, Marco G

    2018-04-01

    Esophageal achalasia is a primary esophageal motility disorder defined by the lack of esophageal peristalsis, and by a lower esophageal sphincter that fails to relax in response to swallowing. Patients' symptoms include dysphagia, regurgitation, aspiration, heartburn, and chest pain. Achalasia is a chronic condition without cure, and treatment options are aimed at providing symptomatic relief, improving esophageal emptying, and preventing the development of megaesophagus. Presently, a laparoscopic Heller myotomy with a partial fundoplication is considered the best treatment modality. A properly executed operation is key for the success of a laparoscopic Heller myotomy.

  13. Transcervical heller myotomy using flexible endoscopy.

    Science.gov (United States)

    Spaun, Georg O; Dunst, Christy M; Arnold, Brittany N; Martinec, Danny V; Cassera, Maria A; Swanström, Lee L

    2010-12-01

    Esophageal achalasia is most commonly treated by laparoscopic myotomy. Transesophageal approaches using flexible endoscopy have recently been described. We hypothesized that using techniques and flexible instruments from our NOTES experience through a small cervical incision would be a safer and less traumatic route for esophageal myotomy. The purpose of this study was to evaluate the feasibility, safety, and success rate of using flexible endoscopes to perform anterior or posterior Heller myotomy via a transcervical approach. This animal (porcine) and human cadaver study was conducted at the Legacy Research and Technology Center. Mediastinal operations on ten live, anesthetized pigs and two human cadavers were performed using standard flexible endoscopes through a small incision at the supra-sternal notch. The esophagus was dissected to the phreno-esophageal junction using balloon dilatation in the peri-esophageal space followed by either anterior or posterior distal esophageal myotomy. Success rate was recorded of esophageal dissection to the diaphragm and proximal stomach, anterior and posterior myotomy, perforation, and complication rates. Dissection of the esophagus to the diaphragm and performing esophageal myotomy was achieved in 100% of attempts. Posterior Heller myotomy was always extendable onto the gastric wall, while anterior gastric extension of the myotomy was found to be more difficult (4/4 and 2/8, respectively; P = 0.061). Heller myotomy through a small cervical incision using flexible endoscopes is feasible. A complete Heller myotomy was performed with a higher success rate posteriorly possibly due to less anatomic interference.

  14. [Laparoscopic Heller myotomy for esophageal achalasia].

    Science.gov (United States)

    Ibáñez, Luis; Butte, Jean Michel; Pimentel, Fernando; Escalona, Alex; Pérez, Gustavo; Crovari, Fernando; Guzmán, Sergio; Llanos, Osvaldo

    2007-04-01

    Achalasia is characterized by an incomplete relaxation of the lower esophageal sphincter. The best treatment is surgical and the laparoscopic approach may have good results. To assess the results of laparoscopic Heller myotomy among patients with achalasia. Prospective study of patients subjected to a laparoscopic Heller myotomy between 1995 and 2004. Clinical features, early and late operative results were assessed. Twenty seven patients aged 12 to 74 years (12 females) were operated. All had disphagia lasting for a mean of 32 months. Mean lower esophageal sphincter pressure ranged from 18 to 85 mmHg. Eight patients received other treatments prior to surgery but symptoms persisted or reappeared. The preoperative clinical score was 7. No patient died and no procedure had to be converted to open surgery. In a follow up of 21 to 131 months, all patients are satisfied with the surgical results and the postoperative clinical score is 1. Only one patient with a mega esophagus maintained a clinical score of six. In this series of patients, laparoscopic Heller myotomy was an effective and safe treatment for esophageal achalasia.

  15. Palaemonidae (Crustacea: Decapoda: Caridea from the shallow waters from Quintana Roo, Mexican Caribbean coast Palaemonidae (Crustacea: Decapoda: Caridea de las aguas someras de Quintana Roo, Caribe mexicano

    Directory of Open Access Journals (Sweden)

    Ramiro Román-Contreras

    2010-04-01

    Full Text Available Few studies have focused on the palaemonid fauna of the Mexican Caribbean. This study provides a list of shallow water free-living and symbiont shrimps of the family Palaemonidae collected on turtle grass (Thalassia testudinum in Bahía de la Ascensión, Bahía del Espíritu Santo and Mahahual reef lagoon, Quintana Roo, Mexico. Ten species in 8 genera are reported, of which the genus Periclimenes is the most diverse with 3 species. An updated geographic distribution along the western Atlantic and other regions is provided for all the species. The greatest affinity of the palaemonid fauna studied, besides that with the Caribbean province, is with the Brazilian, Argentinian, and Texan zoogeographic provinces. Of the 10 species reported in this paper, 8 represent new local records in the studied area.Los crustáceos de la familia Palaemonidae del Caribe mexicano han sido poco estudiados. En este trabajo se presenta un listado de palemónidos de vida libre y simbiontes recolectados en el pasto marino Thalassia testudiuim de Bahía de la Ascensión, Bahía del Espíritu Santo y la laguna arrecifal de Mahahual, Quintana Roo, México. Se registran 10 especies pertenecientes a 8 géneros, siendo el género Periclimenes el más diverso con 3 especies. Para todas las especies se proporciona su distribución geográfica en la costa del Atlántico americano así como en otras regiones. Además de la provincia Caribeña, los palemónidos recolectados también muestran alta afinidad con otras provincias zoogeográficas como la Brasileña, Argentina y Texana; de las 10 especies registradas en este estudio, 8 representan nuevo registro local en el área estudiada.

  16. Shallow-water anomuran and brachyuran crabs (Crustacea: Decapoda from southern Bahia, Brazi l Cangrejos anomuros y braquiuros (Crustacea: Decapoda de aguas someras del sur de Bahia, Brasil

    Directory of Open Access Journals (Sweden)

    Alexandre O Almeida

    2010-01-01

    Full Text Available The objective of this study was to determine the taxonomic composition and ecological aspects of decapods crustacean species belonging to the infraorders Anomura and Brachyura in shallow marine and estuarine waters from southern Bahia, a coastline about 640 km in extent, corresponding to approximately 7% of the Brazilian coast. Sixteen species of the infraorder Anomura and 68 of the infraorder Brachyura are reported for the study area. The most important families in terms of number of species were the Panopeidae with 11 species, and the Ocypodidae and Portunidae with 9. Among the Brachyura, the southern distribution of the species Austinixa leptodactyla Coelho, 1997 (Pinnotheridae, endemic to Brazil, is extended from the coast of Sergipe to Bahía (Prado, Cumuruxatiba Beach, 17°06'18.6"S, 39°10'50.4"W. The ocypodid Uca (Leptuca cumulanta Crane, 1943 and also the pinnotherids Austinixa aidae (Righi, 1967 and Fabia byssomiae (Say, 1818 are reported for the first time from the Bahia coast. The specimen of F. byssomiae examined was collected in the mantle cavity of the clam Macoma constrict (Bruchiére, 1792 (Bivalvia: Tellinidae, a new host record for the species.El objetivo del presente estudio fue determinar la composición taxonómica y aspectos ecológicos de los crustáceos decápodos pertenecientes a los infraórdenes Anomura y Brachyura, en aguas someras, marinas y estuarinas del sur de Bahia, Brasil, una línea costera con cerca de 640 km de extensión, que corresponde aproximadamente al 7% de la costa brasileña. Para esta area de estudio se registraron 16 especies del infraorden Anomura y 68 del infraorden Brachyura. Las familias más representativas en términos de número de especies fueron Panopeidae, con 11 especies, y Ocypodidae y Portunidae, ambas con nueve especies. Entre los Brachyura, la distribución meridional de Austinixa leptodactyla Coelho, 1997 (Pinnotheridae, endémica del Brasil, se extiende desde la costa de Sergipe hasta la costa de Bahia (Municipalidad de Prado, Playa de Cumuruxatiba, 17°06'18.6"S, 39°10'50.4"W. Se reportó por primera vez para Bahia el ocipódido Uca (Leptuca cumulanta Crane, 1943, al igual que los pinotéridos Austinixa aidae (Righi, 1967 y Fabia byssomiae (Say, 1818. El único espécimen de F. byssomiae fue recolectado al interior de la cavidad paleal del molusco Macoma constricta (Bruchiére, 1792 (Bivalvia: Tellinidae, representando un nuevo huésped para esta especie.

  17. Atividade nictimeral e tempo de digestão de Aegla longirostri (Crustacea, Decapoda, Anomura Diel activity and digestion time of Aegla longirostri (Crustacea, Decapoda, Anomura

    Directory of Open Access Journals (Sweden)

    Carolina C. Sokolowicz

    Full Text Available O objetivo do presente trabalho foi caracterizar o ritmo de atividade e tempo de digestão em Aegla longirostri Bond-Buckup & Buckup, 1994. Os animais foram coletados em Santa Maria, RS, Brasil. Em laboratório, os animais foram transferidos para aquários individuais (5L. Para testar a atividade locomotora e alimentar dos aeglídeos um grupo de animais permaneceu sob luminosidade constante durante 12 horas, enquanto outro grupo permanecia no escuro, essa condição sendo invertida a cada 12 horas. As observações foram realizadas a cada 6 horas. Para determinar o tempo de digestão os animais foram alimentados e a cada 30 minutos um indivíduo era sacrificado. Aegla longirostri mostrou menor atividade em períodos de luminosidade, o que aconteceu nos dois grupos de animais. Essa espécie leva aproximadamente 5 horas para concluir a digestão extracelular. Os resultados sugerem que A. longirostri possui hábitos noturnos e provavelmente se alimenta sempre que há recursos disponíveis.The aim of this work was to characterize the diel activity rhythm and time of digestion in Aegla longirostri Bond-Buckup & Buckup, 1994. The individuals were collected in Santa Maria, RS, Brazil. In laboratory, the animals were kept in individuals glass aquariums (5L. To test locomotor and feeding activity of the aeglids, a group remained under constant luminosity for 12 hours, while another group was mantained in the dark, this condition being reversed at each 12 hours. The observations were taken at every 6 hours. For the determination of digestion's time the animals were fed, and one individual was sacrificed at each 30 minutes. Aegla longirostri showed lower activity in periods of light time. This condition was recorded for both groups of animals. This species takes approximately 5 hours to conclude its extracellular digestion. The results suggest that A. longirostri has nocturnal habits and probably feeds whenever resources are available.

  18. Endoscopic Therapy for Achalasia Before Heller Myotomy Results in Worse Outcomes Than Heller Myotomy Alone

    Science.gov (United States)

    Smith, C Daniel; Stival, Alessandro; Howell, D Lee; Swafford, Vickie

    2006-01-01

    Objective: Heller myotomy has been shown to be an effective primary treatment of achalasia. However, many physicians treating patients with achalasia continue to offer endoscopic therapies before recommending operative myotomy. Herein we report outcomes in 209 patients undergoing Heller myotomy with the majority (74%) undergoing myotomy as secondary treatment of achalasia. Methods: Data on all patients undergoing operative management of achalasia are collected prospectively. Over a 9-year period (1994–2003), 209 patients underwent Heller myotomy for achalasia. Of these, 154 had undergone either Botox injection and/or pneumatic dilation preoperatively. Preoperative, operative, and long-term outcome data were analyzed. Statistical analysis was performed with multiple χ2 and Mann-Whitney U analyses, as well as ANOVA. Results: Among the 209 patients undergoing Heller myotomy for achalasia, 154 received endoscopic therapy before being referred for surgery (100 dilation only, 33 Botox only, 21 both). The groups were matched for preoperative demographics and symptom scores for dysphagia, regurgitation, and chest pain. Intraoperative complications were more common in the endoscopically treated group with GI perforations being the most common complication (9.7% versus 3.6%). Postoperative complications, primarily severe dysphagia, and pulmonary complications were more common after endoscopic treatment (10.4% versus 5.4%). Failure of myotomy as defined by persistent or recurrent severe symptoms, or need for additionally therapy including redo myotomy or esophagectomy was higher in the endoscopically treated group (19.5% versus 10.1%). Conclusion: Use of preoperative endoscopic therapy remains common and has resulted in more intraoperative complications, primarily perforation, more postoperative complications, and a higher rate of failure than when no preoperative therapy was used. Endoscopic therapy for achalasia should not be used unless patients are not candidates for

  19. Intraoperative Assessment of Esophagogastric Junction Distensibility During Laparoscopic Heller Myotomy.

    Science.gov (United States)

    DeHaan, Reece K; Frelich, Matthew J; Gould, Jon C

    2016-04-01

    We sought to characterize the changes in esophagogastric junction (EGJ) distensibility during Heller Myotomy with Dor fundoplication using the EndoFLIP device. Intraoperative distensibility measurements on 14 patients undergoing Heller myotomy with Dor fundoplication were conducted over an 18-month period. Minimum esophageal diameter, cross-sectional areas, and distensibility index were measured at 30 and 40 mL catheter volumes before myotomy, postmyotomy, and following Dor fundoplication. Distensibility index is defined as the narrowest cross-sectional area divided by the corresponding pressure expressed in mm/mm Hg. Heller myotomy was found to lead to significant changes in the distensibility characteristics of the EGJ. Minimum esophageal diameter and EGJ distensibility increased significantly with Heller myotomy.

  20. Videoscopic Heller Myotomy with Intraoperative Endoscopy Promotes Optimal Outcomes

    Science.gov (United States)

    Bloomston, Mark; Brady, Patrick

    2002-01-01

    Background and Objectives: Minimally invasive surgical techniques are applicable to achalasia, but the optimum approach to intraoperative assessment of adequacy of myotomy remains unestablished. We set out to show that videoscopic Heller myotomy with concurrent endoscopy ensures adequacy of myotomy while limiting postoperative clinically apparent reflux. Methods: Seventy-eight consecutive patients with achalasia underwent videoscopic Heller myotomy with concomitant endoscopy between 1992 and 1998. Fundoplication was not routinely undertaken. Results: Preoperative symptoms consisted of dysphagia (100%), emesis/regurgitation (68%), heartburn (58%), and postprandial chest pain (49%). Following myotomy, significant improvement (P Heller myotomy guides the extent and adequacy of myotomy. By utilizing a focused dissection with preservation of the natural antireflux mechanisms around the gastroesophageal junction and limiting the extent of myotomy along the cardia, postoperative reflux symptoms are minimized. We advocate concomitant endoscopy during Heller myotomy to guide myotomy and submit that routine fundoplication is clinically unnecessary. PMID:12113416

  1. Outcomes promote reoperative Heller myotomy for symptoms of achalasia.

    Science.gov (United States)

    Rakita, S; Villadolid, D; Kalipersad, C; Thometz, D; Rosemurgy, A

    2007-10-01

    Heller myotomy is accepted as first-line therapy for achalasia, yet for a small number of patients, symptoms persist or recur after myotomy. This study was undertaken to report our results with reoperative laparoscopic Heller myotomy for recurrent symptoms of achalasia. We have undertaken laparoscopic Heller myotomy in 275 patients and reoperative myotomy in 12 patients for recurrent dysphagia, of which three had their initial myotomy undertaken by us. For each, studies prior to reoperative Heller myotomy documented a nonrelaxing lower esophageal sphincter without stricture. Patients scored symptoms before and after reoperative myotomy. Before reoperative myotomy, 75% underwent dilation and 42% underwent Botox injection. Ten of twelve reoperative myotomies were undertaken and completed laparoscopically. Median follow-up is 24.1 months (29.0 months + 25.89). Symptom frequency and severity scores improved significantly after reoperative myotomy. Frequency of vomiting and frequency and severity of heartburn were improved after reoperative myotomy, but not to a significant extent. However, they were not particularly notable prior to surgery, compared to obstructive symptoms, such as dysphagia. Excellent or good outcomes were reported in 73%, and notably, 91% stated that they would have the operation again after having been through the process firsthand and knowing their outcomes. Patient outcomes promote the application of reoperative Heller myotomy for recurrent or persistent symptoms of achalasia following Heller myotomy.

  2. The “Learning Curve” in Videoscopic Heller Myotomy

    Science.gov (United States)

    Bloomston, Mark; Serafini, Francesco; Boyce, H. Worth

    2002-01-01

    Objectives: In the early 1990s, minimally invasive videoscopy was applied to numerous operations. After undertaking more than 50 “open” Heller myotomies, our experience with videoscopic Heller myotomy began in 1992. We sought to determine whether the outcome following videoscopic Heller myotomy is influenced by surgeon experience. Methods: Seventy-eight patients with severe dysphagia secondary to achalasia underwent videoscopic Heller myotomy between 1992 and 1998. Intraoperative endoscopy was utilized to ensure adequate myotomy in all patients. Patients were stratified into 3 groups: the first 25 patients (group I), the second 25 patients (group II), and the last 28 patients (group III). Clinical outcome was based on length of stay, incidence of intraoperative complications, conversion to an ‘open’ procedure, and postoperative symptoms. Results: Perioperative complications occurred in 20% of patients in group I compared with 8% and 12% in groups II and III, respectively (P = NS). Only 3 patients required conversion to an ‘open’ procedure, all in group I (P myotomies were undertaken. Conclusion: Outcome following videoscopic Heller myotomy, like other videoscopic operations, improves as surgeons progress along the videoscopic “learning curve.” After approximately 20 videoscopic Heller myotomies, surgeons can expect fewer conversions to open procedures, shorter hospital stays, and better symptomatic relief. PMID:12002295

  3. Does concomitant anterior fundoplication promote dysphagia after laparoscopic Heller myotomy?

    Science.gov (United States)

    Tapper, Donovan; Morton, Connor; Kraemer, Emily; Villadolid, Desiree; Ross, Sharona B; Cowgill, Sarah M; Rosemurgy, Alexander S

    2008-07-01

    Concerns for gastroesophageal reflux after laparoscopic Heller myotomy for achalasia justify considerations of concomitant anterior fundoplication. This study was undertaken to determine if concomitant anterior fundoplication reduces symptoms of reflux after myotomy without promoting dysphagia. From 1992 to 2004, 182 patients underwent laparoscopic Heller myotomy without fundoplication. After a prospective randomized trial justified its concomitant application, anterior fundoplication was undertaken with laparoscopic Heller myotomy in 171 patients from 2004 to 2007. All patients have been prospectively followed. Pre and postoperatively, patients scored the frequency and severity of symptoms of achalasia (including dysphagia, choking, vomiting, regurgitation, chest pain, and heartburn) using a Likert Scale (0 = never/not bothersome to 10 = always/very bothersome). Before myotomy, symptoms of achalasia were frequent and severe for all patients. After myotomy, the frequency and severity of all symptoms of achalasia significantly decreased for all patients (P Heller myotomy alone, concomitant anterior fundoplication led to significantly less frequent and severe heartburn after myotomy (P Heller myotomy reduces the frequency and severity of symptoms of achalasia. Concomitant anterior fundoplication decreases the frequency and severity of heartburn and dysphagia after laparoscopic Heller myotomy. Concomitant anterior fundoplication promotes salutary relief in the frequency and severity of symptoms after myotomy and is warranted.

  4. Peroral endoscopic myotomy (POEM): feasible as reoperation following Heller myotomy.

    Science.gov (United States)

    Vigneswaran, Yalini; Yetasook, Amy K; Zhao, Jin-Cheng; Denham, Woody; Linn, John G; Ujiki, Michael B

    2014-06-01

    The purpose of this study was to demonstrate the feasibility of performing peroral endoscopic myotomy (POEM) in the management of recurrent achalasia after failed myotomy. Eight patients presented to our institution between October 2010 and June 2013 with recurrent/persistent symptoms after prior laparoscopic Heller myotomy. Three patients underwent redo laparoscopic Heller myotomy, and five patients consented to redo myotomy with POEM. Demographics were similar between the groups with exception of age (POEM 69.5 vs. laparoscopic Heller myotomy (LHM) 34.5, p = 0.003). Preoperative Eckardt scores, motility, and prior interventions were not significantly different. Three patients who underwent POEM and two who underwent laparoscopic Heller myotomy had prior fundoplication. There was one perforation identified after laparoscopic Heller myotomy and one patient with persistent subcutaneous emphysema after POEM. Both POEM and laparoscopic Heller myotomy demonstrated significant improvement in symptoms and Eckardt scores at average follow-up of approximately 5 months (p myotomy even in the presence of prior fundoplication. The procedure can be performed safely using a similar technique as for primary myotomy with the exception of creating the myotomy laterally along the right side of the esophagus and lesser curvature avoiding the previous anterior myotomy.

  5. Treatments for pediatric achalasia: Heller myotomy or pneumatic dilatation?

    Science.gov (United States)

    Jung, C; Michaud, L; Mougenot, J-F; Lamblin, M-D; Philippe-Chomette, P; Cargill, G; Bonnevalle, M; Boige, N; Bellaïche, M; Viala, J; Hugot, J-P; Gottrand, F; Cezard, J-P

    2010-03-01

    The treatment of achalasia consists of reducing distal esophageal obstruction by either Heller myotomy surgery or endoscopic pneumatic dilatation. The aim of the present study was to evaluate the short- and middle-term results of these procedures in children. For technical reasons, children under six years old (n=8) were treated by surgery only, whereas patients over six years old (n=14) were treated by either Heller myotomy or pneumatic dilatation. Of the children aged under six years, 75% were symptom-free at six months and 83% at 24 months of follow-up. Of the patients aged over six years, complete remission was achieved by Heller myotomy in 44.5% vs. 55.5% by pneumatic dilatation after six months, and in 40% vs. 65%, respectively, after 24 months. Both pneumatic dilatation and Heller myotomy showed significant rates of failure. These results suggest that pneumatic dilatation may be considered a primary treatment in children over six years old. Also, where necessary, Heller myotomy and pneumatic dilatation may be used as complementary treatments.

  6. Robot-assisted Heller's myotomy for achalasia in children.

    Science.gov (United States)

    Altokhais, Tariq; Mandora, Hala; Al-Qahtani, Ayed; Al-Bassam, Abdulrahman

    2016-12-01

    Achalasia is rare in children. Surgical options include open, laparoscopic and robotic approaches. However, Heller's myotomy remains the treatment of choice. This report describes our experience with robot-assisted Heller's myotomy in children and presents a review of the literature. Included in this study are children who underwent robot-assisted Heller's myotomy for esophageal achalasia via the Da Vinci surgical system between 2004 and 2015 at King Saud University Medical City, Riyadh, Saudi Arabia. The medical records of these patients were reviewed for demographic data, presenting symptoms, diagnostic modalities, operative procedures, complications, outcomes and follow-ups. Six patients were identified. The age of the patients at surgery ranged between 2 and 12 years (mean 7.1 years). The most common presenting symptoms were dysphagia, vomiting and nocturnal cough. Contrast swallow and upper gastrointestinal endoscopy established a diagnosis of esophageal achalasia in all of the patients. Four patients underwent esophageal dilatation 2-5 times before the definitive procedure. All patients underwent successful robot-assisted Heller's myotomy with concomitant partial posterior fundoplication. The postoperative course was uneventful. Five patients had a complete resolution of the symptoms and one patient improved. The follow-up assessments have been consistent and have ranged from 0.5 to 11 years (mean 4.4 years). Robotic-assisted Heller's myotomy for esophageal achalasia in children is safe and effective and is a suitable alternative to open and laparoscopic approaches.

  7. Laparoscopic Heller myotomy for achalasia: results after 10 years.

    Science.gov (United States)

    Cowgill, Sarah M; Villadolid, Desiree; Boyle, Robert; Al-Saadi, Sam; Ross, Sharona; Rosemurgy, Alexander S

    2009-12-01

    Laparoscopic Heller myotomy was first undertaken in the early 1990s, and appreciable numbers of patients with 10-year follow-up periods are now available. This study was undertaken to determine long-term outcomes after laparoscopic Heller myotomy used to treat achalasia. Of 337 patients who have undergone laparoscopic Heller myotomy since 1992, 47 who underwent myotomy more than 10 years ago have been followed through a prospectively maintained registry. Among many symptoms, patients scored dysphagia, chest pain, vomiting, regurgitation, choking, and heartburn before and after myotomy using a Likert scale with choices ranging from 0 (never/not bothersome) to 10 (always/very bothersome). Symptom scores before and after myotomy were compared using a Wilcoxon matched-pairs test. Data are reported as median (mean ± standard deviation). The median length of the hospital stay was 2 days (mean, 3 ± 8.6 days; range, 1-60 days). Notable complications were infrequent after myotomy. There were no perioperative deaths. One patient required a redo myotomy after 5 years due to recurrence of symptoms. At this writing, 33 patients (70%) are still alive. The causes of death after discharge were unrelated to myotomy. The frequency and severity scores for dysphagia, chest pain, vomiting, regurgitation, choking, and heartburn all decreased significantly after laparoscopic Heller myotomy (p Heller myotomy can be undertaken with few complications. This procedure significantly decreases the frequency and severity of achalasia symptoms without promoting heartburn. The symptoms of achalasia are durably ameliorated by laparoscopic Heller myotomy during long-term follow-up evaluation, thereby promoting application of this procedure.

  8. Surgical Treatment for Achalasia of the Esophagus: Laparoscopic Heller Myotomy

    Science.gov (United States)

    Torres-Villalobos, Gonzalo; Martin-del-Campo, Luis Alfonso

    2013-01-01

    Achalasia is an esophageal motility disorder that leads to dysphagia, chest pain, and weight loss. Its diagnosis is clinically suspected and is confirmed with esophageal manometry. Although pneumatic dilation has a role in the treatment of patients with achalasia, laparoscopic Heller myotomy is considered by many experts as the best treatment modality for most patients with newly diagnosed achalasia. This review will focus on the surgical treatment of achalasia, with special emphasis on laparoscopic Heller myotomy. We will also present a brief discussion of the evaluation of patients with persistent or recurrent symptoms after surgical treatment for achalasia and emerging technologies such as LESS, robot-assisted myotomy, and POEM. PMID:24348542

  9. Surgical Treatment for Achalasia of the Esophagus: Laparoscopic Heller Myotomy

    Directory of Open Access Journals (Sweden)

    Gonzalo Torres-Villalobos

    2013-01-01

    Full Text Available Achalasia is an esophageal motility disorder that leads to dysphagia, chest pain, and weight loss. Its diagnosis is clinically suspected and is confirmed with esophageal manometry. Although pneumatic dilation has a role in the treatment of patients with achalasia, laparoscopic Heller myotomy is considered by many experts as the best treatment modality for most patients with newly diagnosed achalasia. This review will focus on the surgical treatment of achalasia, with special emphasis on laparoscopic Heller myotomy. We will also present a brief discussion of the evaluation of patients with persistent or recurrent symptoms after surgical treatment for achalasia and emerging technologies such as LESS, robot-assisted myotomy, and POEM.

  10. Population biology of the crab Armases angustipes (Crustacea, Decapoda, Sesarmidae at Brazilian tropical coast

    Directory of Open Access Journals (Sweden)

    Marina de Sá Leitão C. de Araújo

    2014-06-01

    Full Text Available The semi terrestrial crabs are important elements of the fauna of coastal regions. The aim of this study was to analyze the population structure of Armases angustipes (Dana, 1852 at estuaries of the Ariquindá River, considered a non impacted area, and Mamucabas River, considered a few impacted area, on the south coast of state of Pernambuco, Brazil. The species occurred in all months of the year. The number of individuals per month varied, being higher in the months of transition between the seasons. This is probably due to significant seasonal variations of air and burrow temperature and burrow salinity. There was no sexual dimorphism in size of A. angustipes in the mangrove of Ariquindá River, but males were larger than females in the mangrove of Mamucabas River. In both estuaries, the sex ratio did not differ from Mendelian proportion, but showed a deviation for females. The analysis of temporal variation in sex ratio showed significant differences in some months of the year. These variations are due to cyclical events that act distinctly on each sex. In both estuaries, size classes of carapace width were equally represented by both sexes. The ovigerous females of A. angustipes occurred only in some months of the year, especially in summer, in both estuaries. Probably the high phytoplankton productivity observed in summer favors the reproductive activity, since these algae serve as food for the larvae. Specimens of the population of Rio Ariquindá are largest and wider than those of Mamucabas River. This fact, associated with the low abundance of crabs and the lower frequency of ovigerous females observed in Mamucabas River, is an indication that this population may be influenced by the environmental impacts that this estuary has received.

  11. Shoaling of sergestid shrimp Acetes johni (Crustacea Decapoda: Sergestidae) associated with swarming of gammarid amphipods

    Digital Repository Service at National Institute of Oceanography (India)

    Goswami, S.C.

    zooplankton standing stock (5.81 ml.m/3). The sergestid shrimps and gammarid amphipods formed 94.7% of the zooplankton population, the former constituting more than half of the biomass of the sample. Their numerical abundance decreased with depth. The adaptive...

  12. Grooming as a secondary behavior in the shrimp Macrobrachium rosenbergii (Crustacea, Decapoda, Caridea

    Directory of Open Access Journals (Sweden)

    Lauren VanMaurik

    2014-11-01

    Full Text Available The giant freshwater prawn, Macrobrachium rosenbergii, is a large shrimp extensively used in aquaculture whose grooming behaviors were analyzed in this study. Macrobrachium rosenbergii exhibits three unique male morphotypes that differ in their behavior, morphology and physiology: small-clawed males (SM, orange-clawed males (OC and blue-clawed males (BC. The largest and most dominant males, BC males, are predicted to have significantly different grooming behaviors compared to females and the other two male morphotypes. These BC males may be too large and bulky to efficiently groom and may dedicate more time to mating and agonistic interactions than grooming behaviors. Observations were conducted to look at the prevalence of grooming behaviors in the absence and presence of conspecifics and to determine if any differences in grooming behavior exist among the sexes and male morphotypes. Significant differences in the grooming behaviors of all individuals (females and male morphotypes were found. BC males tended to have the highest grooming time budget (percent of time spent grooming while SM males had a relatively low grooming time budget. The grooming behaviors of the male morphotypes differed, indicating while these males play distinct, separate roles in the social hierarchy, they also have different grooming priorities. The conditions in which M. rosenbergii are cultured may result in increased body fouling, which may vary, depending on the grooming efficiencies and priorities of these male morphotypes. Overall, grooming behaviors were found to be a secondary behavior which only occurred when primary behaviors such as mating, feeding or fighting were not present.

  13. Molecular phylogeny of Pasiphaeidae (Crustacea, Decapoda, Caridea) reveals systematic incongruence of the current classification.

    Science.gov (United States)

    Liao, Yunshi; De Grave, Sammy; Ho, Tsz Wai; Ip, Brian H Y; Tsang, Ling Ming; Chan, Tin-Yam; Chu, Ka Hou

    2017-10-01

    Caridean shrimps constitute one of the most diverse groups of decapod crustaceans, notwithstanding their poorly resolved infraordinal relationships. One of the systematically controversial families in Caridea is the predominantly pelagic Pasiphaeidae, comprises 101 species in seven genera. Pasiphaeidae species exhibit high morphological disparity, as well as ecological niche width, inhabiting shallow to very deep waters (>4000m). The present work presents the first molecular phylogeny of the family, based on a combined dataset of six mitochondrial and nuclear gene markers (12S rDNA, 16S rDNA, histone 3, sodium-potassium ATPase α-subunit, enolase and ATP synthase β-subunit) from 33 species belonged to six genera of Pasiphaeidae with 19 species from 12 other caridean families as outgroup taxa. Maximum likelihood and Bayesian inference analyses conducted on the concatenated dataset of 2265bp suggest the family Pasiphaeidae is not monophyletic, with Psathyrocaris more closely related to other carideans than to the other five pasiphaeid genera included in this analysis. Leptochela occupies a sister position to the remaining genera and is genetically quite distant from them. At the generic level, the analysis supports the monophyly of Pasiphaea, Leptochela and Psathyrocaris, while Eupasiphae is shown to be paraphyletic, closely related to Parapasiphae and Glyphus. The present molecular result strongly implies that certain morphological characters used in the present systematic delineation within Pasiphaeidae may not be synapomorphies and the classification within the family needs to be urgently revised. Copyright © 2017 Elsevier Inc. All rights reserved.

  14. Monomia lucida sp. nov., a new swimming crab (Crustacea: Decapoda: Portunidae) from the South China Sea.

    Science.gov (United States)

    Koch, Milan; ĎuriŠ, ZdenĚk

    2018-02-27

    A new species of the portunid genus, Monomia Gistel, 1848, is described from the South China Sea in Vietnam. Monomia lucida sp. nov. is morphologically most similar to M. argentata (A. Milne-Edwards, 1861), which was originally described from Sarawak, on the island of Borneo. In addition to the stout, forward-directed anterolateral teeth of the carapace, the subrectangular sixth segment of the male pleon, and the long and slender laterally bent first gonopods, adults of the new species reach a greater size, and can also be distinguished from M. argentata by the colour pattern on the natatory dactylus. The independent specific status of M. lucida sp. nov. is also supported by molecular evidence. Aside from a comparison of this new species with other known congeners, new photographs of the holotype of M. samoensis (Ward, 1939) are also provided.

  15. A new species of the genus Linuparus White, from the South China Sea (Crustacea Decapoda)

    NARCIS (Netherlands)

    Bruce, A.J.

    1965-01-01

    The palinurid genus Linuparus White, 1847, has been represented by a single recent species, Linuparus trigonus (Von Siebold). The trawl survey of the northern shelf region of the South China Sea at present being carried out by the R.V. "Cape St. Mary" of the Fisheries Research Station, Hong Kong,

  16. Evolution through cold and deep waters: the molecular phylogeny of the Lithodidae (Crustacea: Decapoda)

    Science.gov (United States)

    Hall, Sally; Thatje, Sven

    2018-04-01

    The objectives of this work are to use gene sequence data to assess the hypothesis that the Lithodinae arose from ancestors with uncalcified abdomens in shallow waters of the North-East Pacific, investigate the monophyly and interrelationships of genera within the Lithodinae and to estimate the scale and minimum number of biogeographic transitions from the shallow environment to the deep sea and vice versa. To do this, phylogenetic analysis from three mitochondrial and three nuclear markers was conducted using minimum evolution, maximum likelihood and Bayesian methods. The Lithodinae as defined to include North Pacific genus Cryptolithodes may be paraphyletic, with the Hapalogastrinae and Cryptolithodes as sister taxa. This implies that the soft-bodied abdomen of the Hapalogastrinae might not be plesiomorphic for the Lithodidae. Paralomis, Lopholithodes, Phyllolithodes, Lithodes and Neolithodes share a common ancestor, from which the North Pacific Hapalogastrinae did not descend. Lithodid ancestors are likely to have had a north Pacific, shallow water distribution and to have had planktotrophic larvae. North Pacific genus Paralithodes is paraphyletic; P. brevipes is the most basal member of the genus (as sampled) while P. camtschaticus and P. platypus are more closely related to the genera Lithodes and Neolithodes. Genera Lithodes, Neolithodes and Paralomis (as sampled) are monophyletic if Glyptolithodes is included within Paralomis. Lopholithodes is closely related to, but not included within, the Paralomis genus. Paralomis is divided into at least two major lineages: one containing South Atlantic, West African, and Indian Ocean species, and the other containing Pacific and South American species. Several species of Paralomis do not resolve consistently with any other groups sampled, implying a complex and possibly rapid global evolution early in the history of the genus. Relationships within the Lithodes genus vary between analytical methods, suggesting that conclusions may not be stable. Consistently, however, Indian Ocean and Pacific forms— L. murrayi, L. longispina and L. nintokuae form a group separated from Atlantic species such as L. santolla, L. confundens, L. maja and L. ferox.

  17. Ecomorphology of crabs and swimming crabs (Crustacea DecapodaBrachyura from coastal ecosystems

    Directory of Open Access Journals (Sweden)

    Murilo Zanetti Marochi

    Full Text Available Abstract Brachyuran crabs are one of the most diverse taxa of crustaceans, occurring in almost all coastal habitats. Due to their high morphological diversification, the authors sought to ascertain the existence of morphological patterns related to the habitat of coastal brachyuran crabs. We analyzed 17 species from mangrove forests, rocky shores, sandy beaches and exclusively aquatic marine/estuarine ecosystems. A total of 16 linear measurements of males and 17 of females were obtained for each habitat. We were able to discriminate three functional groups of crab species, based on their habitat: 1. Complex Substrates, 2. Semiterrestrial, 3. Exclusively Aquatic. The species belonging to the Complex Substrates group had long ambulatory legs, as well as being heteroquely related to uneven terrain. Semiterrestrial species showed ambulatory legs of different sizes, allowing them to walk easily on the terrestrial terrain due to the long fourth ambulatory leg, and long eyestalks which are important for visual communication. Exclusively Aquatic species showed the largest carapace widths and the shortest eyestalks. The presence of different crab lineages in the environments analyzed allows us to demonstrate the clear evolutionary convergence, by which the crabs adapted to their specific habitat and environment.

  18. New sibling species and new occurrences of squat lobsters (Crustacea, Decapoda from the western Indian Ocean

    Directory of Open Access Journals (Sweden)

    Enrique Macpherson

    2017-08-01

    Full Text Available Numerous specimens of squat lobsters belonging to the families Munididae, Munidopsidae and Eumunididae were collected during several cruises along the eastern coasts of Africa. The study of these specimens revealed the presence of 10 new species (one Eumunida Smith, 1883, eight Munida Leach, 1820 and one Munidopsis Whiteaves, 1874. We describe and illustrate these new species, providing some new data on occurrences and colour patterns for previously described taxa. We have also included molecular data from two mitochondrial markers (16S rRNA and COI to support the taxonomic status of different species. Some deep-sea species show a clear increase in their geographic range distribution. Finally, a key to known species of the genus Munida from the western and central Indian Ocean is also presented.

  19. Phylogenetic relationships, character evolution, and taxonomic implications within the slipper lobsters (Crustacea: Decapoda: Scyllaridae).

    Science.gov (United States)

    Yang, Chien-Hui; Bracken-Grissom, Heather; Kim, Dohyup; Crandall, Keith A; Chan, Tin-Yam

    2012-01-01

    The slipper lobsters belong to the family Scyllaridae which contains a total of 20 genera and 89 species distributed across four subfamilies (Arctidinae, Ibacinae, Scyllarinae, and Theninae). We have collected nucleotide sequence data from regions of five different genes (16S, 18S, COI, 28S, H3) to estimate phylogenetic relationships among 54 species from the Scyllaridae with a focus on the species rich subfamily Scyllarinae. We have included in our analyses at least one representative from all 20 genera in the Scyllaridae and 35 of the 52 species within the Scyllarinae. Our resulting phylogenetic estimate shows the subfamilies are monophyletic, except for Ibacinae, which has paraphyletic relationships among genera. Many of the genera within the Scyllarinae form non-monophyletic groups, while the genera from all other subfamilies form well supported clades. We discuss the implications of this history on the evolution of morphological characters and ecological transitions (nearshore vs. offshore) within the slipper lobsters. Finally, we identify, through ancestral state character reconstructions, key morphological features diagnostic of the major clades of diversity within the Scyllaridae and relate this character evolution to current taxonomy and classification. Copyright © 2011 Elsevier Inc. All rights reserved.

  20. Reproductive biology of galatheoid and chirostyloid (Crustacea: Decapoda) squat lobsters from the Gulf of Mexico.

    Science.gov (United States)

    Kilgour, Morgan J; Shirley, Thomas C

    2014-01-16

    Reproductive timing, fecundity, and average egg sizes were examined for galatheoid and chirostyloid squat lobster collections from the Gulf of Mexico. While congeners did not always significantly differ in egg size or timing, each genus had a unique average egg diameter size which may indicate whether the developing embryos will be lecithotrophic or planktotrophic larvae. The eggs of Eumunididae, Galatheidae, and Munididae were more numerous and smaller than the larger and less abundant eggs of Chirostylidae and Munidopsidae. With the exception of members of the Munididae, members of genera within the same family had distinct egg diameters. Ovigerous females were significantly larger than non-ovigerous females in some species (i.e., Uroptychus nitidus, Munida forceps, Galacantha spinosa, Munidopsis abbreviata, M. alaminos, M., erinacea, M. robusta, M. sigsbei, and M. simplex). Munidopsis erinacea and Munida affinis males were significantly larger than females; the reverse was true for Munidopsis robusta and Munidopsis simplex. All other species studied did not have a significant difference between males and females. The spatial and bathymetric ranges for many species are extended in this study from prior reports. Seasonality of reproduction was evident in few species, but this may be a result of limited sample sizes.

  1. Descriptions of Five Species of Scyllarine Lobsters (Crustacea, Decapoda, Scyllaridae in Korea

    Directory of Open Access Journals (Sweden)

    Joo Il Kim

    2013-04-01

    Full Text Available Five scyllarine lobster species, belonging to the family Scyllaridae, are described from Korean waters: Chelarctus cultrifer (Ortmann, 1897, Crenarctus bicuspidatus (De Man, 1905, Galearctus kitanoviriosus (Harada, 1962, G. timidus (Holthuis, 1960, and Petrarctus brevicornis (Holthuis, 1946. Of these, three species, C. bicuspidatus, G. timidus, and P. brevicornis are new to Korean marine carcinological fauna. This report extends the known range of G. timidus to the southern coast of Korea from Taiwan in the East China Sea. Excluding C. bicuspidatus and G. kitanoviriosus, the other three species are relatively rare in Korean waters. They are described herein with color photographs, and a key to the Korean genera and species of Scyllarinae is also presented.

  2. First Report of Two Species of Genus Raymunida (Crustacea: Decapoda: Anomura from Korea

    Directory of Open Access Journals (Sweden)

    Sanghui Lee

    2013-10-01

    Full Text Available Two species of squat lobsters, Raymunida formosanus Lin, Chan and Chu, 2004 and Raymunida lineata Osawa, 2005, are newly added to the Korean decapod fauna. The genus Raymunida Macpherson and Machordom, 2000 is also reported for the first time in Korea. It differs morphologically from other Korean genera, Munida and Paramunida, in having the first to third pereopods with epipods and the carpus of the third maxilliped with a distal spine on flexor margin. Illustrations and pictures of these two species are provided with descriptions, and the key to the species of Korean Munidids is also provided.

  3. On the type material of Scyllarides deceptor Holthuis, 1963 (Crustacea: Decapoda: Scyllaridae

    Directory of Open Access Journals (Sweden)

    Marcos Tavares

    2009-01-01

    Full Text Available The only specimen listed in the original description of Scyllarides deceptor Holthuis, 1963 is the holotype from São Paulo, Brazil, presently housed in the Leiden Museum. From the original description, however, it is clear that the new species was actually based on a number of additional specimens. Six of them exist in the collections of the Museum of Zoology in São Paulo, and are shown herein to be paratypes of S. deceptor. Scyllarides deceptor and S. brasiliensis Rathbun, 1906, continue to be confounded with one another, in consequence of their very similar color patterns and locally sympatric distributions. As many as 251,786 tons of slipper lobsters have been landed in Santa Catarina between 2000 and 2007. These catches have been attributed to S. deceptor alone and did not take into consideration the existence of a second species in the area, S. brasiliensis. Correct recognition of slipper-lobster species will be critical to properly evaluate the lobster stocks in southeastern Brazil. An opportunity is taken herein to elaborate on the taxonomy of S. deceptor and S. brasiliensis.

  4. Evolutionary history of true crabs (Crustacea: Decapoda: Brachyura) and the origin of freshwater crabs.

    Science.gov (United States)

    Tsang, Ling Ming; Schubart, Christoph D; Ahyong, Shane T; Lai, Joelle C Y; Au, Eugene Y C; Chan, Tin-Yam; Ng, Peter K L; Chu, Ka Hou

    2014-05-01

    Crabs of the infra-order Brachyura are one of the most diverse groups of crustaceans with approximately 7,000 described species in 98 families, occurring in marine, freshwater, and terrestrial habitats. The relationships among the brachyuran families are poorly understood due to the high morphological complexity of the group. Here, we reconstruct the most comprehensive phylogeny of Brachyura to date using sequence data of six nuclear protein-coding genes and two mitochondrial rRNA genes from more than 140 species belonging to 58 families. The gene tree confirms that the "Podotremata," are paraphyletic. Within the monophyletic Eubrachyura, the reciprocal monophyly of the two subsections, Heterotremata and Thoracotremata, is supported. Monophyly of many superfamilies, however, is not recovered, indicating the prevalence of morphological convergence and the need for further taxonomic studies. Freshwater crabs were derived early in the evolution of Eubrachyura and are shown to have at least two independent origins. Bayesian relaxed molecular methods estimate that freshwater crabs separated from their closest marine sister taxa ~135 Ma, that is, after the break up of Pangaea (∼200 Ma) and that a Gondwanan origin of these freshwater representatives is untenable. Most extant families and superfamilies arose during the late Cretaceous and early Tertiary.

  5. Feeding of the planktonic shrimp Lucifer faroni Borradaile, 1915 (Crustacea: Decapoda in the laboratory

    Directory of Open Access Journals (Sweden)

    Luz Amelia Vega-Pérez

    1996-01-01

    Full Text Available Feeding behavior of juveniles of the planktonic shrimp Lucifer faxoni Borradaile was studied in the laboratory under light and dark conditions. Newly-hatched nauplii and metanauplii of Artemio were used as prey organisms. The fecding raie of L. foxoni was dependent on prey size and prey density, but was not obviously affected by light or dark conditions. The capture of the prey tended to increase with longer exposure time to prey. The maximum ingestion rate was 17.28 and 13.40 nauplii.L. faxoni .d- , in the light and in the dark conditions, respectively.O comportamento alimentar de espécimens jovens de Lucifer faxoni Borradaile, em laboratório, sob condições de luz e escuro, foi estudado utilizando-se como alimento náuplios recém-eclodidos e metanáuplios de Artemio. Neste estudo a taxa de alimentação de L. faxoni foi influenciada pelo tamanho e concentração da presa, bem como pelo tempo de contato com a mesma. A atividade alimentar de L. faxoni foi maior em condições de luz, quando comparado com as condições de escuro. f- taxa máxima de ingestão calculada foi de 17,28 e 13,40 náuplios.L. faxoni .d- para as condições de luz e escuro, respectivamente.

  6. Role of maxilla 2 and its setae during feeding in the shrimp Palaemon adspersus (Crustacea: Decapoda)

    DEFF Research Database (Denmark)

    Garm, A; Hallberg, E; Høeg, J T

    2003-01-01

    The movements of the basis of maxilla 2 in Palaemon adspersus were examined using macro-video recordings, and the morphology of its setae was examined using both scanning and transmission electron microscopy. The basis of maxilla 2 performs stereotypical movements in the latero-medial plane and g...

  7. Three species of Crustacea Decapoda Macrura from Southern Brazil, including a new species of Upogebia

    NARCIS (Netherlands)

    Holthuis, L.B.

    1956-01-01

    In June 1954, during an ecological study of the mangroves near the Research Station of the São Paulo University Oceanographic Institute at Cananeia, about 200 km south of Santos, southern Brazil, Dr. S. Gerlach of the Zoological Institute and Museum of the University of Kiel, Germany, collected some

  8. New Report of the Varunid Crabs, Hemigrapsus takanoi and Sestrostoma toriumii (Crustacea: Decapoda: Varunidae from Korea

    Directory of Open Access Journals (Sweden)

    Sanghui Lee

    2013-04-01

    Full Text Available As a result of continuous taxonomic studies on the Korean crabs, two varunid crabs, Hemigrapsus takanoi Asakura and Watanabe, 2005 and Sestrostoma toriumii (Takeda, 1974, are newly reported from Korean waters. Hemigrapsus takanoi, as a sibling species of H. penicillatus, has not been recognized in Korean waters, and this species occurs in the sympatric habitat with H. penicillatus in the Korean peninsula. Sestrostoma toriumii (Takeda, 1974 is associated with thallassinid Upogebia major (De Haan, 1841 and echiuran Urechis unicintus (Von Drache, 1881 as the case of S. balssi (Shen, 1932. The Korean S. toriumii showed smaller size than those mentioned in the original description. Their illustrations and pictures are provided with descriptions, and the distributions of these species in the Korean peninsula are also provided.

  9. Thermal biology of the sub-polar-temperate estuarine crab Hemigrapsus crenulatus (Crustacea: Decapoda: Varunidae).

    Science.gov (United States)

    Cumillaf, Juan P; Blanc, Johnny; Paschke, Kurt; Gebauer, Paulina; Díaz, Fernando; Re, Denisse; Chimal, María E; Vásquez, Jorge; Rosas, Carlos

    2016-02-15

    Optimum temperatures can be measured through aerobic scope, preferred temperatures or growth. A complete thermal window, including optimum, transition (Pejus) and critical temperatures (CT), can be described if preferred temperatures and CT are defined. The crustacean Hemigrapsus crenulatus was used as a model species to evaluate the effect of acclimation temperature on: (i) thermal preference and width of thermal window, (ii) respiratory metabolism, and (iii) haemolymph proteins. Dependant on acclimation temperature, preferred temperature was between 11.8°C and 25.2°C while CT was found between a minimum of 2.7°C (CTmin) and a maximum of 35.9°C (CTmax). These data and data from tropical and temperate crustaceans were compared to examine the association between environmental temperature and thermal tolerance. Temperate species have a CTmax limit around 35°C that corresponded with the low CTmax limit of tropical species (34-36°C). Tropical species showed a CTmin limit around 9°C similar to the maximum CTmin of temperate species (5-6°C). The maximum CTmin of deep sea species that occur in cold environments (2.5°C) matched the low CTmin values (3.2°C) of temperate species. Results also indicate that the energy required to activate the enzyme complex (Ei) involved in respiratory metabolism of ectotherms changes along the latitudinal gradient of temperature. © 2016. Published by The Company of Biologists Ltd.

  10. Thermal biology of the sub-polar–temperate estuarine crab Hemigrapsus crenulatus (Crustacea: Decapoda: Varunidae)

    Science.gov (United States)

    Cumillaf, Juan P.; Blanc, Johnny; Paschke, Kurt; Gebauer, Paulina; Díaz, Fernando; Re, Denisse; Chimal, María E.; Vásquez, Jorge; Rosas, Carlos

    2016-01-01

    ABSTRACT Optimum temperatures can be measured through aerobic scope, preferred temperatures or growth. A complete thermal window, including optimum, transition (Pejus) and critical temperatures (CT), can be described if preferred temperatures and CT are defined. The crustacean Hemigrapsus crenulatus was used as a model species to evaluate the effect of acclimation temperature on: (i) thermal preference and width of thermal window, (ii) respiratory metabolism, and (iii) haemolymph proteins. Dependant on acclimation temperature, preferred temperature was between 11.8°C and 25.2°C while CT was found between a minimum of 2.7°C (CTmin) and a maximum of 35.9°C (CTmax). These data and data from tropical and temperate crustaceans were compared to examine the association between environmental temperature and thermal tolerance. Temperate species have a CTmax limit around 35°C that corresponded with the low CTmax limit of tropical species (34–36°C). Tropical species showed a CTmin limit around 9°C similar to the maximum CTmin of temperate species (5–6°C). The maximum CTmin of deep sea species that occur in cold environments (2.5°C) matched the low CTmin values (3.2°C) of temperate species. Results also indicate that the energy required to activate the enzyme complex (Ei) involved in respiratory metabolism of ectotherms changes along the latitudinal gradient of temperature. PMID:26879464

  11. A phylogeny-based revision of the family Luciferidae (Crustacea: Decapoda)

    DEFF Research Database (Denmark)

    Vereshchaka, Alexander L.; Olesen, Jørgen; Lunina, Anastasia A.

    2016-01-01

    different types of oceanic habitat. The phylogenetic analysis revealed monophyly of Luciferidae and the presence of two terminal robust clades within the family, which we treat as separate genera, Lucifer and Belzebub gen. nov. Morphological trends within Luciferidae are discussed, and diagnoses and keys...

  12. Caridean shrimps (Crustacea, Decapoda) from seagrass habitats in Hansa Bay, Papua New Guinea

    NARCIS (Netherlands)

    Grave, de Sammy

    1999-01-01

    Five species of caridean shrimps collected from seagrass habitats at Hansa Bay, on the northern coastline of Papua New Guinea are reported. Four species are new to the fauna of Papua New Guinea. Morphological details of Nikoides danae, Latreutes pymoeus and L. porcinus are discussed and compared to

  13. Functional morphology of the hepatopancreas of Palaemonetes argentinus (Crustacea: Decapoda) : influence of environmental pollution

    International Nuclear Information System (INIS)

    Sousa, L. G.; Petriella, A. M.

    2007-01-01

    Morphological and functional state of hepatopancreas were analyzed in Palaemonetes argentinus from two environments with different pesticide concentrations. Los Padres lagoon (Argentina) is an area subjected to contamination due to the slow exchange of water, the shallow depth and the input of contaminated water. Prawns living in this lagoon accumulate high amounts of organochlorine pesticides in their tissues. Hepatopancreas of prawns from Canal 5, an adjacent shallow stream where the amount of pesticides is below toxic levels, and from Los Padres lagoon were processed by standard histological techniques with light microscopy and transmission electronic microscopy. At Los Padres lagoon, there were found important tissular alterations, such as intertubular infiltration of haemocytes and connective tissue, epithelial retraction in some tubules, and a folded basal lamina. Important necrotic desquamation, with cariolysis, cariorrexis and lack of cellular details were also observed. Numerous tubules presented an enlarged and irregular lumen with the epithelium atrophied or completely absent. In general, the lesions were particularly located in the medullar region of the organ. At the ultrastructural level, R and F cells were the most damaged. Both cell types had nuclear retraction, chromatin condensation and cytoplasmic lysis. Some R cells also had dilated mitochondria and numerous lysosomes, and the basal cytoplasm was nearly completely lysed. The hepatopancreas of prawns from Canal 5 did not evidence any alterations. The histopathological study of the hepatopancreas is a highly sensitive tool to evaluate the physiological condition of prawns and water quality. Other environmental conditions were similar, so it can be assumed that pollutants were the main cause of organ deterioration. (author)

  14. Growth of hatchery raised banana shrimp Penaeus merguiensis (de Man) (Crustacea: Decapoda) juveniles under different salinity

    Digital Repository Service at National Institute of Oceanography (India)

    Saldanha, C.M.; Achuthankutty, C.T.

    relationships of estuaries to the fisheries of the Gulf of Mexico, in Estuaries, edited by Lauff G H (Amer Ass Adv Sci Publ, Washington D C) 1967, pp. 621-638. 3 Mair J McD, Salinity and water-type preference of four species of postlarval shrimp (Penaeus) from... west Mexico, J Exp Mar Biol Ecol, 45(1980)69-82. 4 Achuthankutty C T & Parulekar A H, Biology of commercially important penaeid prawns of Goa waters, Indian J Mar Sci, 15 (1986)171-173. 5 Achuthankutty C T & Parulekar A H, Distribution of penaeid...

  15. Justitia Holthuis, 1946 (Crustacea, Decapoda, Palinuridea) from the Middle Eocene of Verona and Vicenza (northern Italy)

    NARCIS (Netherlands)

    Garassino, Alessandro; Angeli, De Antonio

    2003-01-01

    Recently, Beschin et al. (2001) have described two specimens of palinurids, discovered at Chiampo (“Albanello” quarry, Vicenza, northern Italy). Preserved three dimensionally, these were collected from limestones of Lutetian (middle Eocene) age. The peculiar ornament of the dorsal carapace surface,

  16. Ensayo de diferentes lecitinas en la dieta de juveniles de Penaeus vannamei (Crustacea: Decapoda

    Directory of Open Access Journals (Sweden)

    Ana Denisse Re-Araujo

    2003-09-01

    Full Text Available Para comparar diferentes niveles y calidades de lecitina se hizo un bioensayo nutricional con dietas isoenergéticas; para medir el crecimiento, la tasa de conversión alimenticia y sobrevivencia de juveniles de P. vannamei (290 mg ± 0.02. Las lecitinas experimentales fueron de calamar, lecitina liquida de soya (7%, lecitina desaceitada de soya (3.48% en combinación con aceite de pescado o lípidos neutros de calamar, en una formula parcialmente desaceitada. Las cinco dietas fueron administradas ad libitum con cuatro replicas (estanques de 15 camarones cada uno (5 x 4 x 15, durante 28 días. La mayor ganancia en peso fue (191% y FCR (1.69±0.041 fueron obtenidos con la dieta que contenía 7% de lecitina cruda de soya como única fuente de lípidos, seguida por la dieta que contenía 3.94% de lecitina desaceitada y 2.24% de aceite Menhaiden (172% y 2.03±0.054 respectivamente. Como se esperaba los resultados menos propicios fueron con la dieta que no contenía lecitina (121% y 2.42±0.129. La lecitina cruda de soya, cubrió los requerimientos de fosfolípidos y de lípidos neutrales, tanto como la dieta con lecitina desaceitada de soya con aceite de pescado o aceite de calamarThe effect of different lecithin sources and presentations on growth, food conversion ratio and survival of P. vannamei (290 mg ± 0.02 was studied. The bioassay was designed in order to compare different dietary levels and different quality of lecithin. Squid lecithin, crude soybean (7%, deoiled soybean lecithin (3.48% in combination with fish oil or squid neutral lipids, in a partially dilapidate formula. The isoenergetic diets were fed ad libitum to four replicate groups (tanks of 15 shrimps each (5 x 4 x 15, during 28 days. The result of the bioassay with the partially dilapidate formulas was; the best growth rate (191% and FCR (1.69±0.041 were obtained with the diet containing 7% of soybean crude lecithin as the unique lipid source. Followed by the diet countering 3.94% deoiled lecithin and 2.42% Menhaden oil (172% and 2.03±0.054 respectively. As expected, the worst results were obtained without the dietary lecithin 121% and 2.42±0.129. Crude soybean lecithin alone covered the phospholipid and neutral lipids requirements as well as the combination of deoiled soybean lecithin with fish or squid oil

  17. Siamthelphusa holthuisi spec. nov., a new species of gecarcinucoid freshwater crab (Crustacea: Decapoda: Brachyura) from Thailand

    NARCIS (Netherlands)

    Naiyanetr, P.; Ng, P.K.L.

    1990-01-01

    A new species of freshwater crab, Siamthelphusa holthuisi spec. nov., is described from eastern Thailand. This species is closely allied to Siamthelphusa improvisa (Lanchester, 1901) from southern Thailand and northern Malaysia, but can be easily separated by its different male first pleopod

  18. Thermal biology of the sub-polar–temperate estuarine crab Hemigrapsus crenulatus (Crustacea: Decapoda: Varunidae

    Directory of Open Access Journals (Sweden)

    Juan P. Cumillaf

    2016-03-01

    Full Text Available Optimum temperatures can be measured through aerobic scope, preferred temperatures or growth. A complete thermal window, including optimum, transition (Pejus and critical temperatures (CT, can be described if preferred temperatures and CT are defined. The crustacean Hemigrapsus crenulatus was used as a model species to evaluate the effect of acclimation temperature on: (i thermal preference and width of thermal window, (ii respiratory metabolism, and (iii haemolymph proteins. Dependant on acclimation temperature, preferred temperature was between 11.8°C and 25.2°C while CT was found between a minimum of 2.7°C (CTmin and a maximum of 35.9°C (CTmax. These data and data from tropical and temperate crustaceans were compared to examine the association between environmental temperature and thermal tolerance. Temperate species have a CTmax limit around 35°C that corresponded with the low CTmax limit of tropical species (34–36°C. Tropical species showed a CTmin limit around 9°C similar to the maximum CTmin of temperate species (5–6°C. The maximum CTmin of deep sea species that occur in cold environments (2.5°C matched the low CTmin values (3.2°C of temperate species. Results also indicate that the energy required to activate the enzyme complex (Ei involved in respiratory metabolism of ectotherms changes along the latitudinal gradient of temperature.

  19. The complete mitochondrial genome of Somanniathelphusa boyangensis and phylogenetic analysis of Genus Somanniathelphusa (Crustacea: Decapoda: Parathelphusidae.

    Directory of Open Access Journals (Sweden)

    Xin-Nan Jia

    Full Text Available In this study, the authors first obtained the mitochondrial genome of Somanniathelphusa boyangensis. The results showed that the mitochondrial genome is 17,032bp in length, included 13 protein-coding genes, 2 rRNAs genes, 22 tRNAs genes and 1 putative control region, and it has the characteristics of the metazoan mitochondrial genome A+T bias. All tRNA genes display the typical clover-leaf secondary structure except tRNASer(AGN, which has lost the dihydroxyuridine arm. The GenBank database contains the mitochondrial genomes of representatives of approximately 22 families of Brachyura, comprising 56 species, including 4 species of freshwater crab. The authors established the phylogenetic relationships using the maximum likelihood and Bayesian inference methods. The phylogenetic relationship indicated that the molecular taxonomy of S. boyangensis is consistent with current morphological classification, and Parathelphusidae and Potamidae are derived within the freshwater clade or as part of it. In addition, the authors used the COX1 sequence of Somanniathelphusa in GenBank and the COX1 sequence of S. boyangensis to estimated the divergence time of this genus. The result displayed that the divergence time of Somanniathelphusa qiongshanensis is consistent with the separation of Hainan Island from mainland China in the Beibu Gulf, and the divergence time for Somanniathelphusa taiwanensis and Somanniathelphusa amoyensis is consistent with the separation of Taiwan Province from Mainland China at Fujian Province. These data indicate that geologic events influenced speciation of the genus Somanniathelphusa.

  20. A new raninid crab, Pseudorogueus Rangiferus (Decapoda, Crustacea, from the Eocene of Spain

    Directory of Open Access Journals (Sweden)

    Fraaye, R. H.B.

    1995-04-01

    Full Text Available new genus and species of raninid crab, Pseudorogueus rangiferus, is described from the Lower Eocene of Catalunya, Spanish Pyrenees.Se describe un nuevo género y especie de cangrejo Raninidae, Pseudorogueus rangiferus, proveniente del Eoceno inferior de los Pirineos Catalanes (Cataluña, España.

  1. A new species of Lysmata Risso, 1816 (Crustacea, Decapoda, Lysmatidae) from the Gulf of Mexico.

    Science.gov (United States)

    Prakash, Sanjeevi; Baeza, J Antonio

    2017-12-12

    A new species of peppermint shrimp, Lysmata baueri n. sp., is described based on a single specimen from the eastern Gulf of Mexico. The new species can be distinguished from other morphologically similar species of Lysmata Risso, 1816 by the number of teeth, length and shape of the rostrum, the length of the antennular peduncle relative to the scaphocerite, the number of meral and ischial articles in the second pereiopods, and the number of spines on the flexor margin of the dactyli from the third to fifth pereiopods. Morphological characters demonstrate that L. baueri n. sp., is most closely related to the eastern Pacific L. californica (Stimpson, 1866), L. nayaritensis Wicksten, 2000 and L. porteri (Rathbun, 1907).

  2. The occurrence of Callinectes arcuatus ordway, 1863 (Crustacea, Decapoda, Portunidae in Bahia, Brazil

    Directory of Open Access Journals (Sweden)

    Edilson Pires de Gouvêa

    1987-01-01

    Full Text Available During the study of the Carcinofauna of the Bahian Coast, some Brachyura Portunidae were found. Some of these animals were Callinectes arcuatus Ordway, 1863 which has its distribution restricted to the Pacific Ocean, from California to Peru and the Galapagos Islands. This is the first occurrence of this species reported from the Atlantic Ocean and the Brazilian Coast (Bahia, 38º50'Wand 12º50'S.Durante o estudo da carcinofauna do litoral baiano, muitos Braquiuros Portunidae foram encontrados. Alguns destes animais foram Callinectes arcuatus Ordway, 1863 que possuia sua distribuição restrita da Califórnia ao Peru e Ilhas Galápagos, no Oceano Pacífico. Esta é a primeira ocorrência desta espécie no Oceano Atlântico e na Costa Brasileira. (Bahia, 12º50'S e 38º50'W.

  3. Callianassa ehsani, a new species of Callianassidae (Crustacea, Decapoda, Axiidea) from Gulf of Oman, Iran.

    Science.gov (United States)

    Sepahvand, Vahid; Tudge, Christopher; Momtazi, Farzaneh

    2018-04-17

    Callianassa ehsani sp. nov. is described as a new species from the Gulf of Oman, Iran. It differs from all other members of the subfamily Callianassinae in having a well-developed meral hook on the merus and 6 or 7 acute spines on the ischium of the large cheliped and characters of the small cheliped and telson. This new species is most similar to Callianassa thailandica Sakai, 2005 and Callianassa persica, Sakai, 2005. The generic assignment of the new species is provisional, reflecting the unstable state of the taxonomy of this family.

  4. Population genetic history of Aristeus antennatus (Crustacea: Decapoda in the Western and Central Mediterranean Sea.

    Directory of Open Access Journals (Sweden)

    Annamaria Marra

    Full Text Available Aristeus antennatus is an ecologically and economically important deep-water species in the Mediterranean Sea. In this study we investigated the genetic variability of A. antennatus sampled from 10 sampling stations in the Western and Central Mediterranean. By comparing our new samples with available data from the Western area, we aim to identify potential genetic stocks of A. antennatus and to reconstruct its historical demography in the Mediterranean. We analyzed two regions of mitochondrial DNA in 319 individuals, namely COI and 16S. We found two main results: i the genetic diversity values consistent with previous data within the Mediterranean and the absence of barriers to gene flow within the Mediterranean Sea; ii a constant long-term effective population size in almost all demes but a strong signature of population expansion in the pooled sample about 50,000 years B.P./ago. We propose two explanation for our results. The first is based on the ecology of A. antennatus. We suggest the existence of a complex meta-population structured into two layers: a deeper-dwelling stock, not affected by fishing, which preserves the pattern of historical demography; and genetically homogeneous demes inhabiting the fishing grounds. The larval dispersal, adult migration and continuous movements of individuals from "virgin" deeper grounds not affected by fishing to upper fishing areas support an effective 'rescue effect' contributing to the recovery of the exploited stocks and explain their genetic homogeneity throughout the Mediterranean Sea. The second is based on the reproduction model of this shrimp: the high variance in offspring production calls for a careful interpretation of the data observed under classical population genetics and Kingman's coalescent. In both cases, management policies for A. antennatus will therefore require careful evaluation of the meta-population dynamics of all stocks in the Mediterranean. In the future, it will be particularly relevant to sample the deepest ones directly.

  5. Dusk but not dawn burrow emergence rhythms of Nephrops norvegicus (Crustacea: Decapoda

    Directory of Open Access Journals (Sweden)

    Valerio Sbragaglia

    2013-10-01

    Full Text Available The Norway lobster, Nephrops norvegicus, can be captured by haul nets only during the emergence from its burrow. In the last few decades, an extensive field research revealed distinct diel (24-h–based catchability patterns at different depths. Laboratory experiments suggested that burrow emergence (used as a proxy of catchability is endogenously controlled via a circadian system. Results were usually presented in terms of mean effects without a quantification of inter-individual variability and arrhythmia. Here, we studied the burrow emergence of 52 adult Nephrops by an infrared actograph endowed with an artificial burrow. Animals were exposed to 12-12 h light-darkness cycle, simulating photic condition of the lower shelf. Forty-five animals showed rhythmic emergence (87%, while seven were arrhythmic (13%. Rhythmic animals were clustered according to their timing of emergence: 54% at dusk and 4% at dawn. Moreover, other animals showed fully diurnal or nocturnal emergence (10% and 19%, respectively. The comparison of our results with those derived from temporally scheduled trawling indicates that bimodal catch patterns observed in shelf populations are poorly observed during individual experiments in the laboratory, where the same light conditions are simulated. Nephrops burrow emergence seems to be the result of a mixed endogenous-exogenous control, while arrhythmia could also be present in the wild.

  6. Chemosensory neurons in the mouthparts of the spiny lobsters Panulirus argus and Panulirus interruptus (Crustacea : Decapoda)

    DEFF Research Database (Denmark)

    Garm, Anders Lydik; Shabani, Shkelzen; Høeg, Jens Thorvald

    2005-01-01

    We studied electrophysiological properties of single chemosensory neurons in the mouthparts of the spiny lobsters Panulirus argus and Panulirus interruptus to complement our growing understanding of the behavioral roles of mouthparts of decapod crustaceans. Food mixtures and 13 single compounds...

  7. Studies on planktonic decapoda and stomatopoda (Crustacea) from the Arabian Sea

    Digital Repository Service at National Institute of Oceanography (India)

    Paulinose, V.T.; Goswami, S.C.; Nair, V.R.

    and longitudes 66 degrees 00' and 78 degrees 00'E and depths ranging from 25 to 500 m. Only 40 samples out of 93, contained planktonic decapods and stomatopods. Maximum number of larvae (1501/100 m3) was obtained from Station 228 (Ga. Cr. 13), a very shallow...

  8. First cytochemical study of haemocytes from the crab Carcinus aestuarii (Crustacea, Decapoda

    Directory of Open Access Journals (Sweden)

    V. Matozzo

    2010-03-01

    Full Text Available For the first time, a morphological study of haemocytes from the crab Carcinus aestuarii was carried out by means of light microscopy and differing cytochemical assays. Analysis of haemocyte size frequency distribution (performed by means of a Coulter Counter revealed the presence of two distinct haemocyte fractions in C. aestuarii haemolymph, depending on cell size. The first fraction was of about 3-5 µm in diameter and 30-50 fL in volume, the second was of about 6-12 µm in diameter and over 200 fL in volume. Mean cell diameter and volume were 8.20±1.7 µm and 272.30±143.5 fL, respectively. Haemocytes observed under light microscope were distinguished in three cell types: granulocytes (28%; 11.94±1.43 µm in diameter with evident cytoplasmic granules, semigranulocytes (27%; 12.38±1.76 µm in diameter with less granules than granulocytes, and hyalinocytes (44%; 7.88±1.6 µm in diameter without granules. In addition, a peculiar cell type was occasionally found (about 1%: it was 25-30 µm in diameter and had a great vacuole and a peripheral cytoplasm with granules. Granulocyte and semigranulocyte granules stained in vivo with Neutral Red, indicating that they were lysosomes. Giemsa’s dye confirmed that granulocytes and semigranulocytes were larger than hyalinocytes. Pappenheim’s panoptical staining and Ehrlich’s triacid mixture allowed to distinguish granule-containing cells (including semigranulocytes in acidophils (64%, basophils (35% and neutrophils (1%. Hyalinocytes showed always a basophilic cytoplasm. Haemocytes were positive to the PAS reaction for carbohydrates, even if cytoplasm carbohydrate distribution varied among cell types. Lastly, lipids were found on cell membrane and in cytoplasm of all haemocyte types in the form of black spots produced after Sudan Black B staining. The morphological characterisation of C. aestuarii haemocytes by light microscopy was necessary before performing both ultrastructural and functional studies of circulating cells.

  9. A review of Strobopagurus Lemaitre, 1989 (Crustacea, Decapoda, Paguroidea, Parapaguridae, with description of a new species

    Directory of Open Access Journals (Sweden)

    Rafael Lemaitre

    2004-09-01

    Full Text Available Species of the parapagurid genus Strobopagurus Lemaitre, 1989 are reviewed based primarily on abundant specimens obtained during French campaigns across the Indo-Pacific region. A new species, S.breviacus, is described. The genus contains two other species, S. gracilipes (A. Milne-Edwards, 1891, the type of the genus, and S.sibogae (de Saint Laurent, 1972. One taxon, Parapagurus kilburni Kensley, 1973, originally described from off eastern Africa, has been found to be a junior synonym of S.sibogae. An updated diagnosis of the genus, and diagnoses and comparative illustrations of all three species, are presented together with a key to aid in their identification. Information on live coloration is provided for S.gracilipes and S. sibogae; live coloration of S. breviacus is not known.

  10. Report on a collection of Crustacea Decapoda and Stomatopoda from Turkey and the Balkans

    NARCIS (Netherlands)

    Holthuis, L.B.

    1961-01-01

    Under the auspices of Leiden University and with the financial aid of various organisations and institutions, Messrs. E. Hennipman, P. Nijhoff, C. Swennen, A. S. Tulp, W. J. M. Vader, and W. J. J. O. de Wilde, most of whom are biological students of Leiden University, made a collecting trip to

  11. On a new species of Alpheus (Crustacea Decapoda, Natantia) from the Eastern Medeterranean

    NARCIS (Netherlands)

    Lewinsohn, Ch.; Holthuis, L.B.

    1978-01-01

    From 30 October to 3 November 1975 an expedition, organized by the Department of Zoology of the University of Tel-Aviv, investigated the marine fauna of the Eastern Mediterranean north of Sinai Peninsula, R.V. "Shikmona" for this purpose was kindly placed at the disposal of the expedition by the

  12. First Records of Two Species of Crabs (Crustacea: Decapoda: Brachyura Collected from Southern Korea

    Directory of Open Access Journals (Sweden)

    Hyun Sook Ko

    2013-04-01

    Full Text Available Two species of crabs, Homola orientalis Henderson, 1888 and Pseudomicippe nipponica (Sakai, 1938, are described and illustrated for the first time in Korea. Homola orientalis was collected at 30 m depth by trap from Busan, and P. nipponica was collected on the intertidal region in Seongsanpo, Jejudo Island. Homola orientalis is the first species of its family in the region. The family Homoldae is characterized by a linea homolica on the carapace and they carry camouflage in the form of sponges or cnidarians with subchelate of the fourth ambulatory legs. The Korean brachyuran fauna now comprises 223 species including the new records from this study.

  13. Studies on the planktonic Decapoda and Stomatopoda (Crustacea) from the western Bay of Bengal

    Digital Repository Service at National Institute of Oceanography (India)

    Paulinose, V.T.; Nair, V.R.; Goswami, S.C.

    Abundance and distribution of decapods and stomatopods were studied, based on 90 samples collected from the western Bay of Bengal (Lat. 09 degrees 58' and 20 degrees 50'N and long. 80 degrees 00'E) between 24 August and 2 October, 1976. The decapod...

  14. A new squat lobster of the genus Munidopsis (Crustacea: Decapoda: Munidopsidae from the Mediterranean Sea

    Directory of Open Access Journals (Sweden)

    Enrique Macpherson

    2011-04-01

    Full Text Available A new species of Munidopsis Whiteaves, 1874 is reported from the south of Crete, at 2046-2104 m, in the eastern Mediterranean Sea. The species (M. ariadne is morphologically closely related to M. maunga Schnabel and Bruce, 2006, from New Zealand. The species is also close to M. polymorpha Koelbel, 1892, from Lanzarote, Canary Islands, and M. talismani A. Milne Edwards and Bouvier, 1894, from the NW Africa. The new species is described and illustrated and a diagnosis along with full illustration is provided for the latter 2 species.

  15. Grooming as a secondary behavior in the shrimp Macrobrachium rosenbergii (Crustacea, Decapoda, Caridea)

    Science.gov (United States)

    VanMaurik, Lauren N.; Wortham, Jennifer L.

    2014-01-01

    Abstract The giant freshwater prawn, Macrobrachium rosenbergii, is a large shrimp extensively used in aquaculture whose grooming behaviors were analyzed in this study. Macrobrachium rosenbergii exhibits three unique male morphotypes that differ in their behavior, morphology and physiology: small-clawed males (SM), orange-clawed males (OC) and blue-clawed males (BC). The largest and most dominant males, BC males, are predicted to have significantly different grooming behaviors compared to females and the other two male morphotypes. These BC males may be too large and bulky to efficiently groom and may dedicate more time to mating and agonistic interactions than grooming behaviors. Observations were conducted to look at the prevalence of grooming behaviors in the absence and presence of conspecifics and to determine if any differences in grooming behavior exist among the sexes and male morphotypes. Significant differences in the grooming behaviors of all individuals (females and male morphotypes) were found. BC males tended to have the highest grooming time budget (percent of time spent grooming) while SM males had a relatively low grooming time budget. The grooming behaviors of the male morphotypes differed, indicating while these males play distinct, separate roles in the social hierarchy, they also have different grooming priorities. The conditions in which Macrobrachium rosenbergii are cultured may result in increased body fouling, which may vary, depending on the grooming efficiencies and priorities of these male morphotypes. Overall, grooming behaviors were found to be a secondary behavior which only occurred when primary behaviors such as mating, feeding or fighting were not present. PMID:25561831

  16. Temporal modification in cardiac rhythmicity of Nephrops norvegicus (Crustacea: Decapoda in relation to trawl capture stress

    Directory of Open Access Journals (Sweden)

    Jacopo Aguzzi

    2005-09-01

    Full Text Available The effects of trawling on cardiac rhythmicity of Nephrops norvegicus (L. are still mostly unknown. Ultradian rhythms reported in previous studies may result from trawling capture stress, thus disappearing following acclimatisation to laboratory conditions. To test this hypothesis, 34 time series of cardiac activity data recorded in constant darkness were studied by Fourier analysis. Spectral decomposition of time series was obtained by defining the fundamental or circadian harmonic (CH in 24-h together with 9 submultiples of this period. The power content (PC of each harmonic was estimated in data segments of 24-h duration (days, giving graphic matrices of PC values over consecutive days. Values of PC for 9 submultiples were summed and studied in a block named ultradian band (UB. The modification in the PC of the CH and of the UB was evaluated during laboratory acclimatisation. A significant increase in the PC of the circadian harmonic component (CH over consecutive days of testing was observed. These findings suggest that, rather than being a product of dim light environmental fluctuations experienced by the animals from the deep waters of the continental slope, ultradian periodicity could well be caused by the stress of capture.

  17. A new species of crinoid-associated Periclimenes from Honduras (Crustacea: Decapoda: Palaemonidae).

    Science.gov (United States)

    De Grave, Sammy

    2014-05-02

    A new species of crinoid associated Periclimenes, P. rincewindi sp. nov. is described from the Bay Islands (Honduras) in the Caribbean. The species associates with the swimming crinoid, Analcidometra armata and displays a unique colour pattern. Morphologically, the new species is closely related to the other known crinoid associates in the Caribbean, specifically Periclimenes crinoidalis, from which it can be distinguished by a suite of relatively minor morphological features.

  18. Pneumatic Dilation versus Laparoscopic Heller's Myotomy for Idiopathic Achalasia

    NARCIS (Netherlands)

    Boeckxstaens, Guy E.; Annese, Vito; des Varannes, Stanislas Bruley; Chaussade, Stanislas; Costantini, Mario; Cuttitta, Antonello; Elizalde, J. Ignasi; Fumagalli, Uberto; Gaudric, Marianne; Rohof, Wout O.; Smout, André J.; Tack, Jan; Zwinderman, Aeilko H.; Zaninotto, Giovanni; Busch, Olivier R.; Lei, A.; Bartelsman, J.; Hirsch, D.; Klinkenberg-Knol, E. C.; Cuesta, M. A.; Simmermacher, R. K. J.; Kuipers, E. J.; Bonjer, H. J.; Masclee, A. A. M.; Ringers, J.; Lerut, A.; Metman, E. H.; Huten, N.; Letessier, E.; Dousset, B.; Pera, M.; Perez de la Serna, J.; Malesci, Alberto; Andriulli, A.; Scaramuzzi, G.; de Santo, E.

    2011-01-01

    Background Many experts consider laparoscopic Heller's myotomy (LHM) to be superior to pneumatic dilation for the treatment of achalasia, and LHM is increasingly considered to be the treatment of choice for this disorder. Methods We randomly assigned patients with newly diagnosed achalasia to

  19. Operative interventions for failed heller myotomy: a single institution experience.

    Science.gov (United States)

    Pallati, Pradeep K; Mittal, Sumeet K

    2011-03-01

    Recurrent dysphagia and/or gastroesophageal reflux (GER) are failures of treatment after Heller myotomy for achalasia. We present our single center experience with surgical interventions for these failures. We did a retrospective analysis of a prospectively collected database. Based on preoperative symptoms and endoscopy, esophagogram, and manometry results, patients were divided into three groups to guide management. Telephone follow-up was done using a structured foregut questionnaire. Between December 2003 and June 2009, 16 patients underwent operative interventions for disabling symptoms after previous Heller myotomy. Eight patients presented primarily with recurrent dysphagia and underwent transabdominal Heller myotomy with partial fundoplication. Seven patients reported good to excellent symptom relief at mean follow-up of 42 months. One patient reported no relief and eventually required esophageal bypass with retrosternal gastric pull-up. Four patients presented with uncontrolled GER. Two patients who underwent redo partial fundoplication reported poor symptomatic outcome and one patient has since undergone short limb Roux-en-y gastric bypass (SLRNYGB) with excellent symptom relief. The other two patients underwent SLRNYGB with excellent relief at 10 months. Four patients had end stage achalasia and underwent esophageal resection with reconstruction. All reported excellent symptom relief at mean follow-up of 36 months. Transabdominal redo Heller myotomy for dysphagia has good outcomes. Redo fundoplication for GER after previous myotomy has poor results and SLRNYGB is an effective option in these patients. Esophageal resection remains an effective, albeit morbid, option for end-stage achalasia.

  20. Efficacy of pneumodilation in achalasia after failed Heller myotomy

    NARCIS (Netherlands)

    Saleh, C. M. G.; Ponds, F. A. M.; Schijven, M. P.; Smout, A. J. P. M.; Bredenoord, A. J.

    2016-01-01

    Heller myotomy is an effective treatment for the majority of achalasia patients. However, a small proportion of patients suffer from persistent or recurrent symptoms after surgery and they are usually subsequently treated with pneumodilation (PD). Data on the efficacy of PD as secondary treatment

  1. Biodiversidad, morfometría y alimentación de los cangrejos del género Callinectes (Decapoda: Portunidae en Santiago de Cuba

    Directory of Open Access Journals (Sweden)

    Liliana Gómez Luna

    2009-09-01

    Full Text Available El objetivo del presente trabajo es el estudio del género Callinectes en la zona costera del municipio de Santiago de Cuba. Se realizó una recolecta de 257 ejemplares durante marzo de 2007 a abril de 2008, en ocho estaciones a lo largo de la costa. El género resultó estar ampliamente distribuido en el litoral y representado al menos por cuatro especies: C. sapidus, C. similis, C. rathbunae y C. larvatus, las dos últimas no incluidas en la lista publicada de crustáceos (Crustacea: Decapoda cubanos. Las especies más abundantes resultaron ser C. sapidus y C. similis. C. rathbunae fue la más ampliamente distribuida. El análisis del contenido estomacal permitió identificar nueve categorías alimentarias, siendo las más importantes los peces y las macroalgas. Las especies de Callinectes tienen un amplio espectro trófico; comen no sólo lo disponible, sino también lo más abundante.Biodiversity, morphometry and diet of Callinectes crabs (Decapoda: Portunidae in Santiago de Cuba. On the basis of fishery intensity and proximity to river mouth, a total of 257 swimming Callinectes crabs were collected from March 2007 to April 2008 in eight localities. Captures were made with hanging nets, to a maximal depth of 1.5m, establishing a top time of 2 hr. The genus was widely distributed, and it is represented at least by four species: C. sapidus, C. similis, C. rathbunae and C. larvatus, the last two not included in the last list of Cuban crustaceans (Crustacea: Decapoda. The size and shape of the gonopods were very useful as taxonomical criteria, considering the prevalence of males. The most abundant species were C. sapidus (47.08%, and C. similis (30.35%. C. rathbunae, which was identified at 75% (6 of the localities, showed a better distribution, followed by C. sapidus, which appears in the 63% (5. Sex rate (Rs by species (male:female was 6.20 for C. rathbunae, 3.58 for C. similis, 1.40 for C. larvatus and 0.40 for C. sapidus. The most abundant

  2. An experience of laparoscopic modified heller cardiomyotomy for achalasia cardia

    International Nuclear Information System (INIS)

    Raza, A.; Majeed, F. A.; Imtiaz, T.; Hussain, M.; Saeed, Y.; Imran, M.

    2017-01-01

    Objective: The study was carried out to ascertain the outcome of laparoscopic modified Heller's myotomy for achalasia cardia and to determine the morbidity associated with it. Study Design: Descriptive cross sectional study. Place and Duration of Study: The study was conducted in Combined Military Hospital (CMH) Rawalpindi over a period of 4 years, from Jan 2010 to Aug 2014. Material and Methods: This study was carried out on patients undergoing surgical repair of laparoscopic Heller myotomy for cardiac achalasia at Combined Military Hospital Rawalpindi over a period of four years (2010-2014). Patients undergoing laparoscopic-modified Heller myotomy at a thoracic referral and surgical training center. Eighteen cases of achalasia cardia based on clinical, barium and endoscopic findings were included in the sample using non probability purposive sampling technique. Pseudo achalasia, sigmoid esophagus were excluded.Laparoscopic modified Heller myotomy was done in all patients. Data were analyzed with the help of SPSS 20.0. Results: Age ranged between 14 years to 40 years with mean age of 28 years. The most frequent symptom was dysphagia (95 percent), followed by regurgitation of ingested food (60 percent), weight loss (40 percent) and chest pain (20 percent). Mean operating time was forty minutes. There was no perioperative mortality. We applied Dor patch in 4 patients. Three patients had mucosal tear on large myotomy, diagnosed per operatively and repaired. There was no conversion to open procedure. There was marked improvement in symptoms especially dysphagia and there was no post operative reflux. Conclusion: Modified Heller myotomy by laparoscopic approach is a safe and effective procedure with acceptable results. It is easy to perform and improves the symptoms of the suffering individual. (author)

  3. Işıklı Gölü ve Kaynaklarının (Çivril-Denizli Crustacea Faunası.

    Directory of Open Access Journals (Sweden)

    Cem Aygen

    2015-12-01

    Full Text Available Bu çalışmada, Işıklı Gölü Crustacea faunasının taksonomik açıdan incelenmesi hedeflenmiştir. Bu amaçla Şubat 1998-Ocak 1999 ayları arasında, gölde ve göle akan kaynak bölgesinde belirlenen 6 istasyondan aylık periyotlarla biyolojik örnekler ve su örnekleri alınmıştır. Araştırma sonunda Işıklı Gölü ve Kaynağı’nda bulunan Crustacea faunasının başlıca Cladocera (16 tür, Copepoda (12 tür, Ostracoda (1 tür, Amphipoda (2 tür, Isopoda (1 tür, Mysidacea (1 tür ve Decapoda (1 tür gruplarından oluştuğu saptanmıştır. Tespit edilen türlerden Cladocera grubundan Diaphanosoma brachyurum, Diaphanosoma mongolianum, Ceriodaphnia pulchella, Simocephalus vetulus, Macrothrix laticornis, Alona rectangula, Alona guttata, Graptoleberis testudinaria, Leydigia leydigi, Biapertura affinis, Chydorus sphaericus, Pleuroxus aduncus ve Disparalona rostrata; Copepoda grubundan Macrocyclops albidus, Eucyclops serrulatus, Eucyclops speratus, Eucyclops macruroides, Metacyclops gracilis, Mesocyclops leuckarti, Cyclops vicinus, Cyclops abyssorum, Cyclops strenuus, Megacyclops viridis, Acanthocyclops robustus, Canthocamptus staphylinus; Ostracoda grubundan Psychrodromus olivaceus; Amphipoda grubundan Gammarus balcanicus, Gammarus obnixus; Isopoda grubundan Asellus aquaticus türleri Işıklı Gölü’nden ilk kez bildirilmektedir

  4. Heller myotomy versus Heller myotomy with Dor fundoplication for achalasia: long-term symptomatic follow-up of a prospective randomized controlled trial.

    Science.gov (United States)

    Kummerow Broman, Kristy; Phillips, Sharon E; Faqih, Adil; Kaiser, Joan; Pierce, Richard A; Poulose, Benjamin K; Richards, William O; Sharp, Kenneth W; Holzman, Michael D

    2018-04-01

    Our prior randomized controlled trial of Heller myotomy alone versus Heller plus Dor fundoplication for achalasia from 2000 to 2004 demonstrated comparable postoperative resolution of dysphagia but less gastroesophageal reflux after Heller plus Dor. Patient-reported outcomes are needed to determine whether the findings are sustained long-term. We actively engaged participants from the prior randomized cohort, making up to six contact attempts per person using telephone, mail, and electronic messaging. We collected patient-reported measures of dysphagia and gastroesophageal reflux using the Dysphagia Score and the Gastroesophageal Reflux Disease-Health-Related Quality of Life (GERD-HRQL) instrument. Patient-reported re-interventions for dysphagia were verified by obtaining longitudinal medical records. Among living participants, 27/41 (66%) were contacted and all completed the follow-up study at a mean of 11.8 years postoperatively. Median Dysphagia Scores and GERD-HRQL scores were slightly worse for Heller than Heller plus Dor but were not statistically different (6 vs 3, p = 0.08 for dysphagia, 15 vs 13, p = 0.25 for reflux). Five patients in the Heller group and 6 in Heller plus Dor underwent re-intervention for dysphagia with most occurring more than five years postoperatively. One patient in each group underwent redo Heller myotomy and subsequent esophagectomy. Nearly all patients (96%) would undergo operation again. Long-term patient-reported outcomes after Heller alone and Heller plus Dor for achalasia are comparable, providing support for either procedure.

  5. Laparoendoscopic single-site Heller myotomy with anterior fundoplication for achalasia.

    Science.gov (United States)

    Barry, Linda; Ross, Sharona; Dahal, Sujat; Morton, Connor; Okpaleke, Chinyere; Rosas, Melissa; Rosemurgy, Alexander S

    2011-06-01

    Laparoendoscopic single-site (LESS) surgery is beginning to include advanced laparoscopic operations such as Heller myotomy with anterior fundoplication. However, the efficacy of LESS Heller myotomy has not been established. This study aimed to evaluate the authors' initial experience with LESS Heller myotomy for achalasia. Transumbilical LESS Heller myotomy with concomitant anterior fundoplication for achalasia was undertaken for 66 patients after October 2007. Outcomes including operative time, complications, and length of hospital stay were recorded and compared with those for an earlier contiguous group of 66 consecutive patients undergoing conventional multi-incision laparoscopic Heller myotomy with anterior fundoplication. Symptoms before and after myotomy were scored by the patients using a Likert scale ranging from 0 (never/not severe) to 10 (always/very severe). Data were analyzed using the Mann-Whitney U test, the Wilcoxon matched-pairs test, and Fisher's exact test where appropriate. Patients undergoing LESS Heller myotomy were similar to those undergoing conventional laparoscopic Heller myotomy in gender, age, body mass index (BMI), blood loss, and length of hospital stay. However, the patients undergoing LESS Heller myotomies had operations of significantly longer duration (median, 117 vs. 93 min with the conventional laparoscopic approach) (pHeller myotomy, additional ports/incisions were required. No patients were converted to "open" operations, and no patients had procedure-specific complications. Symptom reduction was dramatic and satisfying after both LESS and conventional laparoscopic myotomy with fundoplication. The symptom reduction was similar with the two procedures. The LESS approach left no apparent umbilical scar. Heller myotomy with anterior fundoplication effectively treats achalasia. The findings showed LESS Heller myotomy with anterior fundoplication to be feasible, safe, and efficacious. Although the LESS approach increases operative

  6. Improvement of respiratory symptoms following Heller myotomy for achalasia.

    Science.gov (United States)

    Khandelwal, Saurabh; Petersen, Rebecca; Tatum, Roger; Sinan, Huseyin; Aaronson, Daniel; Mier, Fernando; Martin, Ana V; Pellegrini, Carlos A; Oelschlager, Brant K

    2011-02-01

    Although patients with achalasia complain mainly of dysphagia, we have observed that they also have a high rate of respiratory problems. We hypothesized that the latter may be due to poor esophageal clearance leading to aspiration. This study examines the effect of Heller myotomy on these symptoms. We studied the course of 111 patients with achalasia who underwent Heller myotomy between 1994 and 2008 and who agreed to participate in this study. All patients completed a questionnaire postoperatively assessing the preoperative and postoperative prevalence and severity of symptoms using visual analog scales. Patients were divided into two groups: one that included all those with respiratory symptoms (dyspnea, hoarseness, cough, wheezing, sore throat, and/or a history of asthma or pneumonia) prior to myotomy and one that included those without those symptoms. All patients presented with dysphagia as their primary complaint, and 63 (57%) reported respiratory symptoms or disease prior to surgery. There were no significant differences in preoperative characteristics between those with and without respiratory manifestations. After a median follow-up of 71 months (range 9-186 months), 55 (87%) patients reported durable improvement of dysphagia. The frequency and severity of all respiratory symptoms decreased significantly. Twenty-four of the 29 patients (82%) who reported a history of pneumonia prior to surgery did not experience recurrent episodes after Heller myotomy. A Heller myotomy is effective in improving esophageal emptying in patients with achalasia. This results in sustained improvement of dysphagia and associated respiratory symptoms/diseases. This suggests that respiratory symptoms/diseases in these patients are likely caused by esophageal retention of food and secretions, and then aspiration.

  7. Recurrent dysphagia after Heller myotomy: is esophagectomy always the answer?

    Science.gov (United States)

    Loviscek, Maximiliano F; Wright, Andrew S; Hinojosa, Marcelo W; Petersen, Rebecca; Pajitnov, Dmitry; Oelschlager, Brant K; Pellegrini, Carlos A

    2013-04-01

    Esophagectomy has been recommended for patients when recurrent dysphagia develops after Heller myotomy for achalasia. My colleagues and I prefer to correct the specific anatomic problem with redo myotomy and preserve the esophagus. We examined the results of this approach. We analyzed the course of 43 patients undergoing redo Heller myotomy for achalasia between 1994 and 2011 with at least 1-year of follow-up. In 2012, a phone interview and a symptoms questionnaire were completed by 24 patients. Forty-three patients underwent redo Heller myotomy. All patients had dysphagia, 80% had had multiple dilations. Manometry confirmed the diagnosis, lower esophageal sphincter pressure averaged 17 mmHg; 24-hour pH monitoring was not useful because of fermentation; patients were divided into 4 groups according to findings on upper gastrointestinal series. Three patients underwent take down of previous fundoplication only, the remainder 40 had that and a redo myotomy with 3-cm gastric extension. Two mucosal perforations were repaired with primary closure and Dor fundoplication. At a median follow-up of 63 months, 19 of 24 patients reported improvement in dysphagia, with median overall satisfaction rating of 7 (range 3 to 10); 4 patients required esophagectomy for persistent dysphagia. The majority of failures after Heller myotomy present with dysphagia associated with esophageal narrowing. Upper gastrointestinal series is most useful to plan therapy and predicts outcomes. With few exceptions, patients improve substantially with redo myotomy, which can be accomplished laparoscopically with relatively low risk. These findings challenge the previously held concept that all myotomy failures need to be treated by an esophagectomy. Copyright © 2013 American College of Surgeons. Published by Elsevier Inc. All rights reserved.

  8. Surgical Treatment for Achalasia of the Esophagus: Laparoscopic Heller Myotomy

    OpenAIRE

    Gonzalo Torres-Villalobos; Luis Alfonso Martin-del-Campo

    2013-01-01

    Achalasia is an esophageal motility disorder that leads to dysphagia, chest pain, and weight loss. Its diagnosis is clinically suspected and is confirmed with esophageal manometry. Although pneumatic dilation has a role in the treatment of patients with achalasia, laparoscopic Heller myotomy is considered by many experts as the best treatment modality for most patients with newly diagnosed achalasia. This review will focus on the surgical treatment of achalasia, with special emphasis on lapar...

  9. Twenty-year trends in the utilization of Heller myotomy for achalasia in the United States.

    Science.gov (United States)

    Haisley, Kelly R; Preston, Jennifer F; Dolan, James P; Diggs, Brian S; Hunter, John G

    2017-08-01

    Trends in the utilization of Heller myotomy for achalasia in the U.S. over time have not been previously described. Using the Nationwide Inpatient Sample (NIS) database, we analyzed patients undergoing Heller myotomy for achalasia over a 20-year period (1992-2011) to estimate rates of Heller myotomy, locations where the procedures were performed (rural, urban or teaching) and changes in technique (laparoscopic vs open) as well as outcomes of length of stay and in-hospital mortality. Over the last 20 years, the total number of Heller myotomies performed in the U.S. has increased (1576 cases in 1992 to 5046 cases in 2011, p = 0.001). These procedures are now being performed laparoscopically (0.9%-67.0%, p Heller myotomy at teaching institutions with decreased in-hospital mortality and shorter LOS. Copyright © 2017. Published by Elsevier Inc.

  10. Multimedia manuscript. Heller myotomy and intraluminal fundoplication: a NOTES technique.

    Science.gov (United States)

    Perretta, Silvana; Dallemagne, Bernard; Allemann, Pierre; Alleman, Pierre; Marescaux, Jacques

    2010-11-01

    It is generally accepted that the most effective treatment of achalasia is a surgical myotomy. Nevertheless, if a myotomy alone is performed, reflux may occur in up to 30% of patients. The aim of this study was to explore a transoral incisionless stepwise approach to both esophageal Heller myotomy and fundoplication. The first step consisted of creating the esophageal myotomy. Under general anesthesia, with the pig supine, endoscopy was performed to assess the location of the esophagogastric junction (EGJ). The mucosa on the right posterolateral esophageal wall was cut with the needle-knife 15 cm above the lower esophageal sphincter (LES) and then dilated with blunt dissection to introduce the scope. A submucosal tunnel was created distally with CO(2) and blunt dissection. Once the gastroesophageal junction (GEJ) and the clasp fibers were identified, the muscular layer was cut. The scope was withdrawn into the lumen and the mucosal flap was sealed with endoscopic clips. The adequacy of the myotomy was evaluated using pre- and postoperative manometry and by comparing the EGJ distensibility before, during, and after the division of the esophageal muscular fibers using the functional lumen imaging probe, EndoFLIP®. The second step, consisted of building a transoral incisionless fundoplication 4 weeks postoperatively using the EsophyX™. Both Heller myotomy and endoscopic fundoplication were accomplished successfully with no injury to the esophageal mucosa. Postoperative manometry demonstrated a 50% loss in mean LES pressure (mean preoperative LES pressure = 22.2 mmHg; mean postoperative LES pressure = 10 mmHg, P Heller myotomy and partial fundoplication is feasible and effective in the porcine model. A distensibility test such as the EndoFLIP® may provide better information on the opening and closing dynamics of the EGJ, rather than just relying on the sphincter tonic state as measured by manometry.

  11. Decapod crustacea of the Atlantic Coast of Canada

    National Research Council Canada - National Science Library

    Squires, Hubert J

    1990-01-01

    .... Distribution records for each species are provided. The Introduction has a brief history of collections of decapod Crustacea in the area, and the Appendix includes a list of mythological references to some taxonomic names used...

  12. A new species of Chonopeltis (Crustacea: Branchiura) from the ...

    African Journals Online (AJOL)

    Abstract. A new species of Chonopeltis (Crustacea: Branchiura) is described from material collected from the gill chamber of the snake catfish Ciarias theodorae from the Mogalakwena River, a tributary of the Limpopo River in northern Transvaal.

  13. Peroral endoscopic remyotomy for failed Heller myotomy: a prospective single-center study.

    Science.gov (United States)

    Zhou, P H; Li, Q L; Yao, L Q; Xu, M D; Chen, W F; Cai, M Y; Hu, J W; Li, L; Zhang, Y Q; Zhong, Y S; Ma, L L; Qin, W Z; Cui, Z

    2013-01-01

    Recurrence/persistence of symptoms occurs in approximately 20 % of patients after Heller myotomy for achalasia. Controversy exists regarding the therapy for patients in whom Heller myotomy has failed. The aim of the current study was to evaluate the efficacy and feasibility of peroral endoscopic myotomy (POEM), a new endoscopic myotomy technique, for patients with failed Heller myotomy. A total of 12 patients with recurrence/persistence of symptoms after Heller myotomy, as diagnosed by established methods and an Eckardt score of ≥ 4, were prospectively included. The primary outcome was symptom relief during follow-up, defined as an Eckardt score of ≤ 3. Secondary outcomes were procedure-related adverse events, lower esophageal sphincter (LES) pressure on manometry, reflux symptoms, and medication use before and after POEM. All 12 patients underwent successful POEM after a mean of 11.9 years (range 2 - 38 years) from the time of the primary Heller myotomy. No serious complications related to POEM were encountered. During a mean follow-up period of 10.4 months (range 5 - 14 months), treatment success was achieved in 11/12 patients (91.7 %; mean score pre- vs. post-treatment 9.2 vs. 1.3; P Heller myotomy resulting in short-term symptom relief in > 90 % of cases. Previous Heller myotomy may make subsequent endoscopic remyotomy more challenging, but does not prevent successful POEM. © Georg Thieme Verlag KG Stuttgart · New York.

  14. Efficacy of pneumodilation in achalasia after failed Heller myotomy.

    Science.gov (United States)

    Saleh, C M G; Ponds, F A M; Schijven, M P; Smout, A J P M; Bredenoord, A J

    2016-11-01

    Heller myotomy is an effective treatment for the majority of achalasia patients. However, a small proportion of patients suffer from persistent or recurrent symptoms after surgery and they are usually subsequently treated with pneumodilation (PD). Data on the efficacy of PD as secondary treatment for achalasia are scarce. Therefore, this study aimed to investigate the efficacy of PD as treatment for achalasia patients suffering from persistent or recurrent symptoms after Heller myotomy. Patients with recurrent or persistent symptoms (Eckardt score >3) after Heller myotomy were selected. Patients were treated with PD, using a graded distension protocol with balloon sizes ranging from 30 to 40 mm. After each dilation symptoms were assessed to evaluate whether a subsequent dilation with a larger balloon size was required. Patients with recurrent or persistent symptoms (Eckardt score >3) after treatment with a 40-mm balloon were identified as failures. Twenty-four patients were included in total; 15 patients with achalasia type I, seven with achalasia type II and two with achalasia type III. Median relapse time was 2.5 years after Heller myotomy (IQR: 9 years and 3 months). Three patients were not suitable for PD; one patient was morbidly obese and not fit for any form of sedation and two had a siphon-shaped esophagus leaving 21 patients to treat. Eight patients were successfully treated with a single 30-mm balloon dilation (median follow-up time: 6.5 years; IQR: 7.5 years). Four patients required dilations with 30- and 35-mm balloons (median follow-up time: 11 years; IQR: 3 years). Nine patients failed on the 35-mm balloon dilation and underwent a subsequent dilation with a 40-mm balloon, and all failed on this balloon as well. Thus, PD was successful in 12 of the 21 treatable patients, resulting in a success rate of 57% for treatable patients or 50% for all patients. Baseline Eckardt scores were also higher in those that failed (median: 8; IQR: 2) than those that

  15. Esophageal scintigraphy to quantitate esophageal transit of the achalasia patients after heller's myotomy

    International Nuclear Information System (INIS)

    Liu Junfeng; Wang Qizhang; Li Wenqi

    1995-01-01

    To quantitate esophageal transit of the achalasia patients after Heller's myotomy using scintigraphic technique. After a bolus ingestion of 10 ml orange juice containing 185 MBq 99m Tc-DTPA, radioactivity was measured on the esophagus for 5 minutes by SPECT, and esophageal clearance rate was calculated. Forty-two patients and 10 normal controls were included. Esophageal transit was increased significantly after Heller's operation, but it was still lower than normal value. Heller's myotomy can significantly improve esophageal transit in the patients with achalasia, although it does not reach normal level

  16. Notes on a collection of Crustacea Decapoda from the Great Bitter Lake, Egypt, with a list of the species of Decapoda known from the Suez Canal

    NARCIS (Netherlands)

    Holthuis, L.B.

    1956-01-01

    Between August 18 and September 5, 1950, Dr. C. Beets, geologist Royal Dutch Shell Oil Company, explored the aquatic fauna and flora of the Great Bitter Lake. In the course of this exploration dredge hauls were made at 47 stations, distributed all over the lake. An account of this work and a

  17. Robotic-assisted Heller myotomy versus laparoscopic Heller myotomy for the treatment of esophageal achalasia: a case-control study.

    Science.gov (United States)

    Sánchez, Alexis; Rodríguez, Omaira; Nakhal, Elias; Davila, Hugo; Valero, Rair; Sánchez, Renata; Pena, Romina; Visconti, Maria F

    2012-09-01

    Minimally invasive surgery has become the gold standard for the treatment of achalasia. The incorporation of robotic technology can improve many limitations of laparoscopic surgery, through, for example, the availability of three-dimensional vision, increasing the degrees of movement, avoiding the fulcrum effect and optimizing ergonomics. The aim of this study was to compare robotic-assisted laparoscopic Heller myotomy (RAHM) with laparoscopic Heller myotomy (LHM) in terms of efficacy and safety. Thirty-one patients with diagnosis of achalasia confirmed by esophagogram and manometry were included. Dysphagia and weight loss were the main complaints in both groups. 18 patients were treated with LHM and 13 patients with RAHM. There was no difference in mean operative time (76 ± 13 vs. 79 ± 20 min; P = 0.73). Intraoperative complications were less frequent in the robotic-assisted procedures (5.5% vs. 0%); however, this was a non-significant difference. 94.5-100% of patients had relief of their symptoms. We conclude that RAHM is a safe and effective procedure. The operative time is no longer than in LHM, but it is necessary to evaluate the technique in randomized clinical trials to determine its advantages in terms of intraoperative complications.

  18. How robotic-assisted surgery can decrease the risk of mucosal tear during Heller myotomy procedure?

    Science.gov (United States)

    Ballouhey, Quentin; Dib, Nabil; Binet, Aurélien; Carcauzon-Couvrat, Véronique; Clermidi, Pauline; Longis, Bernard; Lardy, Hubert; Languepin, Jane; Cros, Jérôme; Fourcade, Laurent

    2017-06-01

    We report the first description of robotic-assisted Heller myotomy in children. The purpose of this study was to improve the safety of Heller myotomy by demonstrating, in two adolescent patients, the contribution of the robot to the different steps of this procedure. Due to the robot's freedom of movement and three-dimensional vision, there was an improvement in the accuracy, a gain in the safety regarding different key-points, decreasing the risk of mucosal perforation associated with this procedure.

  19. Videoscopic Heller myotomy for achalasia--results beyond short-term follow-up.

    Science.gov (United States)

    Bloomston, M; Boyce, W; Mamel, J; Albrink, M; Murr, M; Durkin, A; Rosemurgy, A

    2000-08-01

    Heller myotomy has long been utilized for patients failing nonoperative management of achalasia. Videoscopy has been advocated to decrease the morbidity of Heller myotomy; however, few reports document outcome beyond 1 year after videoscopic Heller myotomy. To determine perioperative morbidity, relief of dysphagia, and the incidence of postoperative reflux symptoms following videoscopic Heller myotomy with follow-up to over 4 years. Patients with achalasia documented by barium esophogram and esophageal manometry underwent videoscopic Heller myotomy beginning in 1992. Intraoperative peroral endoscopy was utilized to guide the cephalad and caudad extent of myotomy. A barium esophogram was undertaken in the immediate postoperative period to evaluate for subclinical leak and assess esophageal emptying. Seventy-eight patients underwent videoscopic Heller myotomy. The mean age was 51 years +/- 19 (range 14 to 91). Most (62%) patients had undergone pneumatic dilation prior to surgical consultation and 54% had previous botox injections. All patients complained of dysphagia and 40% had symptoms of heartburn prior to myotomy. After myotomy, 91% of patients stated that their swallowing was improved with myotomy. Thirteen patients (18%) experience heartburn more than once per week after myotomy. The average length of stay was 2 +/- 2 days, with 72% of patients spending 2 days or fewer in the hospital. Six (7.7%) major complications occurred: five esophageal perforations and one enterotomy without long-term sequellae. Three procedures (3.8%) were converted to "open" procedures. No deaths occurred. We conclude that videoscopic Heller myotomy is safe and efficacious, with low morbidity and mortality. Videoscopic myotomy provides relief beyond the short term for dysphagia due to achalasia with minimal reflux symptoms. We advocate videoscopic Heller myotomy in the treatment of severe dysphagia due to achalasia not adequately palliated by or amenable to nonoperative management

  20. 100 consecutive minimally invasive Heller myotomies: lessons learned.

    Science.gov (United States)

    Sharp, Kenneth W; Khaitan, Leena; Scholz, Stefan; Holzman, Michael D; Richards, William O

    2002-05-01

    To evaluate the authors' first 100 patients treated for achalasia by a minimally invasive approach. Between November 1992 and February 2001, the authors performed 95 laparoscopic and 5 thoracoscopic Heller myotomies in 100 patients (age 49.5 +/- 1.5 years) with manometrically confirmed achalasia. Before presentation, 51 patients had previous dilation, 23 had been treated with botulinum toxin (Botox), and 4 had undergone prior myotomy. Laparoscopic myotomy was performed by incising the distal 4 to 6 cm of esophageal musculature and extended 1 to 2 cm onto the cardia under endoscopic guidance. Fifteen patients underwent antireflux procedures. There were eight intraoperative perforations and only four conversions to open surgery. Follow-up is 10.8 +/- 1 months; 75% of the patients have been followed up for at least 14 months. Outcomes assessed by patient questionnaires revealed satisfactory relief of dysphagia in 93 patients and "poor" relief in 7 patients. Postoperative heartburn symptoms were reported as "moderate to severe" in 14 patients and "none or mild" in 86 patients. Fourteen patients required postoperative procedures for continued symptoms of dysphagia after myotomy. Esophageal manometry studies revealed a decrease in lower esophageal sphincter pressure (LESP) from 37 +/- 1 mm Hg to 14 +/- 1 mm Hg. Patients with a decrease in LESP of more than 18 mm Hg and whose absolute postoperative LESP was 18 or less were more likely to have relief of dysphagia after surgery. Thirty-one patients who underwent Heller alone were studied with a 24-hour esophageal pH probe and had a median Johnson-DeMeester score of 10 (normal open techniques. Satisfactory outcomes occurred in 93% of patients. Patients whose postoperative LESP was less than 18 mm Hg reported the fewest symptoms. After myotomy, patients rarely have abnormal esophageal acid exposure, and the addition of an antireflux procedure is not required.

  1. Occurrence of the family Pinnotheridae De Haan (Crustacea, Decapoda, Brachyura on the coast of Ceará State, Brazil Ocorrência da família Pinnotheridae De Haan (Crustacea, Decapoda, Brachyura no litoral do Ceará, Brasil

    Directory of Open Access Journals (Sweden)

    Luis Ernesto A. Bezerra

    2006-12-01

    Full Text Available This study reports the occurrence of Austinixa bragantina Coelho, 2005; A. leptodactyla (Coelho, 1997 and Zaops ostreum (Say, 1817 for the State of Ceará, Northeast Brazil. These records represent the first account of the family Pinnotheridae de Haan, 1883 for the coast of Ceará. A. bragantina was collected on May and June 1995 at Futuro Beach, municipality of Fortaleza (3°42'S, 38°27'W. This species was previously known only for the type locality, Canela Island, Bragança, Pará, Brazil. A. leptodactyla was collected on November 2004 at Baleia Beach, municipality of Itapipoca (3°08'S, 39°27'W and Z. ostreum was obtained from the oyster Crassostrea rhizophorae Guilding, 1828, collected on November 2005 at the Jaguaribe River estuary, municipality of Fortim (4°24'S, 37°46'W. Biogeographic considerations regarding the three species and an updated list of all known Brazilian pinnotherid species along with their_geographic distribution are also provided.Este trabalho reporta a ocorrência de Austinixa bragantina Coelho, 2005; A. leptodactyla (Coelho, 1997 e Zaops ostreum (Say, 1817 para o litoral do Estado do Ceará, sendo estes os primeiros registros de representantes da família Pinnotheridae De Haan, 1883 para a costa cearense. A. bragantina foi coletada em maio e junho de 1995, na praia do Futuro, município de Fortaleza (3°42'S, 38°27'W. Esta espécie era conhecida, até o momento, apenas de sua localidade tipo, Ilha Canela, município de Bragança, Pará. A. leptodactyla foi coletada em novembro de 2004, na praia da Baleia, município de Itapipoca (3°08'S, 39°27'W e Z. ostreum foi obtido a partir do exame de ostras da espécie Crassostrea rhizophorae Guilding, 1828, coletadas em novembro de 2005 no estuário do Rio Jaguaribe, município de Fortim (4°24'S, 37°46'W. São apresentadas considerações biogeográficas sobre as três espécies assim como uma lista atualizada de todos os pinoterídeos do litoral brasileiro e sua distribuição geográfica.

  2. Studies on the reproductive dynamics of Pleoticus muelleri (Bate, 1888 (Crustacea, Decapoda, Solenoceridae of Patagonia, Argentina Estudios sobre la dinámica reproductiva del langostino Pleoticus muelleri (Bate, 1888 (Crustacea, Decapoda, Solenoceridae de Patagonia, Argentina

    Directory of Open Access Journals (Sweden)

    Mónica Fernández

    2012-11-01

    Full Text Available Certain aspects of the reproductive dynamics of Argentine red shrimp Pleoticus muelleri (Bate, 1888, distributed between 42°-47°S and 62°W, were investigated. Data and samples were collected during 36 INIDEP research cruises and 87 commercial fishing fleet trips between 1994-2010. Mature and inseminated females size structure as well as the frequency distribution of macroscopic maturity stages of adult females were analyzed on space-time bases. The seasonal development of ovarian maturity stages microscopically determinated was also assessed. Statistical treatment of data included multivariate scaling and cluster analysis. The reproductive activity of the shrimps showed latitudinal differences concerning its onset and duration that could be associated with the variability of environmental conditions. We discuss a shoreward movement of spawning females related to the presence of coastal hydrographic processes that would ensure retention and food for survival of early life stages.Se estudian ciertos aspectos de la dinámica reproductiva del langostino Pleoticus muelleri (Bate, 1988 en el área comprendida entre 42°-47°S y 62°W. Los datos y las muestras analizadas provienen de 36 campanas de investigación del INIDEP y de 87 viajes de la flota comercial langostinera realizados entre 1994 y 2010. Se analiza la estructura de tallas de las hembras maduras e impregnadas, al igual que la distribución de frecuencias de los distintos estadios de madurez sexual de las hembras adultas diferenciados macros-cópicamente, desde un enfoque espacio-temporal. La evolución estacional de los estadios de desarrollo ovárico determinados histológicamente también fue contemplada. El tratamiento estadístico de los datos comprendió un escalamiento multivariado y un análisis de agrupamiento jerárquico. La actividad reproductiva del langostino presenta diferenciaciones latitudinales con respecto a su inicio y duración que podría relacionarse con la variabilidad de las condiciones ambientales. Se discute la relación entre el movimiento hacia la costa de las hembras impregnadas y la presencia de procesos hidrográficos costeros que asegurarían la retención y disponibilidad de alimento para la supervivencia de las primeras etapas de vida.

  3. Idade e crescimento de Callinectes danae e C. ornatus (Crustacea, Decapoda na Baía de Guanabara, Rio de Janeiro, Brasil Age and growth of Callinectes danae and C. ornatus (Crustacea, Decapoda in Guanabara Bay, Rio de Janeiro, Brazil

    Directory of Open Access Journals (Sweden)

    Karina A. Keunecke

    2008-06-01

    Full Text Available Callinectes danae Smith, 1869 e C. ornatus Ordway, 1863 constituem uma parcela importante da produção pesqueira na Baía de Guanabara. Ambas espécies compõem uma fração significativa da fauna-acompanhante sendo exaustivamente descartadas pelas pescarias de arrasto de camarões na costa brasileira. As curvas de crescimento de C. danae e C. ornatus foram calculadas por meio da análise de progressão modal. Para estimar os parâmetros biológicos, foi aplicado o modelo de crescimento de Bertalanffy e para estimar a longevidade foi usada a sua fórmula inversa. As curvas de crescimento foram: ♂ LC = 120 (1 - e -0,005t , ♀ LC = 113 (1 - e -0,005t; ♂ LC = 94 (1 - e -0,005t e ♀ LC = 110 (1 - e -0,005t , respectivamente para C. danae e C. ornatus. A longevidade alcançada para as duas espécies foi em torno de 2,5 anos, além de validar as curvas de crescimento. O estudo do crescimento em crustáceos é de extrema importância, pois além de fornecer a informação biológica básica para o grupo, os parâmetros estimados subsidiam o ordenamento e manejo pesqueiro das espécies exploradas.Callinectes danae Smith, 1869 and C. ornatus Ordway, 1863 constitute an important portion from the fishing products at Guanabara Bay. Both species compose a significant by-catch fraction being a lot discarded during shrimp trawlings along Brazilian coast. Growth curves were estimated by modal progression analysis. For the biological parameters it was applied the Bertalanffy growth function and for the age it was used its inverse formula. Growth curves of C. danae and C. ornatus were respectively: ♂ LC = 120 (1 - e -0,005t, ♀ LC = 113 (1 - e -0,005t; ♂ LC = 94 (1 - e -0,005t and ♀ LC = 110 (1 - e -0,005t. The age for both species reached around 2.5 years, besides to confirm growth curves. Growth study in crustaceans is very important, because besides supplying biological information it subsidizes fishery management for exploted species.

  4. A single institution's experience with more than 500 laparoscopic Heller myotomies for achalasia.

    Science.gov (United States)

    Rosemurgy, Alexander S; Morton, Connor A; Rosas, Melissa; Albrink, Michael; Ross, Sharona B

    2010-05-01

    Long-term symptom relief and patient satisfaction after Heller myotomy are being reported. Herein, we report the largest experience of laparoscopic Heller myotomy for the treatment of achalasia. Since 1992, 505 patients have been prospectively followed after laparoscopic Heller myotomy. Until 2004, concomitant fundoplication was undertaken for a patulous hiatus, a large hiatal hernia, or to buttress the repair of an esophagotomy, then concomitant fundoplication became routinely applied. More recently, laparo-endoscopic single site (LESS) Heller myotomy has been performed when possible to improve cosmesis. Before and after myotomy, patients scored their symptoms. Before myotomy, 60% of patients underwent endoscopic therapy; of these patients, 27% had Botox (Allergan) therapy alone, 52% underwent dilation therapy alone, and 21% had both. Esophagotomy occurred in 7% of patients. Concomitant diverticulectomy was undertaken in 7%, fundoplication was performed in 59%, and LESS Heller myotomy was done in 12%. Median length of stay was 1 day. With mean follow-up at 31 months, the severity of all symptoms improved significantly. After myotomy, 95% experienced symptoms less than once per week, 86% believed their outcome is satisfying or better, and 92% would undergo myotomy again, if necessary. Symptoms after myotomy are similar with or without fundoplication and regardless of the laparoscopic approach used. Laparoscopic Heller myotomy safely and durably relieves symptoms of dysphagia. Confinement is short and satisfaction is very high. Relief of esophageal obstruction is paramount; the approach used or the application of a fundoplication has a lesser impact. Laparoscopic Heller myotomy, preferably with anterior fundoplication using a single site laparoscopic approach, is strongly encouraged for patients with symptomatic achalasia and is efficacious even after failures of dilation and/or Botox therapy. Copyright 2010 American College of Surgeons. Published by Elsevier Inc

  5. Biodiversidad marina de Costa Rica: Crustacea: Decapoda (Penaeoidea, Sergestoidea, Caridea, Astacidea, Thalassinidea, Palinura del Pacífico

    Directory of Open Access Journals (Sweden)

    Rita Vargas

    1999-12-01

    Full Text Available En el Pacífico de Costa Rica se ha encontrado 117 especies de camarones y langostas. Estas se ubican en el Suborden Dendrobranchiata (Penaeoidea, 25 spp.; Sergestoidea, 1 sp.; y en el Suborden Pleocyemata (Caridea, 73 spp.; Astacidea, 1 sp; Thalassinidea, 13 spp. y Palinura, 4 spp.. Veintisiete especies (23% son nuevos infomes para Costa Rica. Cinco informes representan ampliaciones de ámbito, tres de importancia: Pontonia simplex (Holthuis, 1951 se extiende la distribución desde la bahía Tenacatitán, México hasta bahía Culebra, Guanacaste; Veleronia serratifrons (Holthuis, 1951 se amplia la distribución al norte desde La Libertad, Ecuador hasta Sámara, Guanacaste y Axiopsis serratifrons (A. Milne Edwards, 1873 también al norte desde la isla Gorgona, Colombia hasta bahía Culebra, Guanacaste. Nueve especies fueron descritas con material recolectado en Costa Rica y dos son endémicas. 43% de las especies de camarones del Pacífico este se encuentran en la costa Pacífica de Costa Rica. El total de especies indicado aquí es probablemente una subestimación de la diversidad de estos grupos en el Pacífico de Costa Rica.A total of 117 species of shrimp and lobster are known from the Pacific coast of Costa Rica. They belong to the Suborders Dendrobranchiata, Superfamily Penaeoidea (26 species and Pleocyemata, Infraorder Caridea (73, Astacidea (one, Thalassinidea (13, and Palinura (four species. Twenty seven species (23% are reported for the first time for Costa Rica. The distribution range of five species is extended, three of which are significant: Pontonia simplex (Holthuis, 1951 from Tenacatitán Bay, México to Culebra Bay, Guanacaste; Veleronia serratifrons (Holthuis, 1951 from La Libertad, Ecuador to Sámara, Guanacaste and Axiopsis serratifrons (A. Milne Edwards, 1873 from Gorgona Island, Colombia to Culebra Bay, Guanacaste. Nine species, two of which are endemic, were described based on specimens collected in Costa Rica. Forty three percent of the tropical eastern Pacific species of shrimps are found on the Pacific coast of Costa Rica.

  6. Population biology of the burrowing crab Neohelice granulata, (Crustacea: Decapoda: Varunidae from a tropical mangrove in Brazil

    Directory of Open Access Journals (Sweden)

    Rafael A. Gregati

    2009-03-01

    Full Text Available The population biology of the burrowing crab Neohelice granulata (Dana, 1851 from a mangrove in Jabaquara Beach, Paraty, state of Rio de Janeiro, Brazil (23º13'04"S and 44º42'47"W, was studied with respect to the following traits: size-frequency distribution, recruitment, reproductive period, fecundity, and sex ratio. Specimens were sampled monthly from April, 2003 to March, 2004, at the river margins during low tide periods. Size, sex, presence of eggs, and stage of the female gonad were recorded. Ovigerous females had their eggs removed and counted. The reproductive period was continuous and the highest frequency of ovigerous females was recorded in the fall and winter. Mature gonads were found throughout the year and recruitment was continuous but more intense during the summer. The fecundity of N. granulata (30028.3 ± 10861.2 eggs was high in comparison to studies in other localities. In general, the proportion of males was similar to that of females (1:0.92; however, males were predominant in the fall (1:0.77 and winter (1:0.75. All the information available so far on the reproduction of N. granulata involves populations from subtropical salt marshes; therefore, comparative studies including other habitats, such as mangrove forests, are needed to further understand the environmental influences on the population and reproductive biology of semiterrestrial crabs.

  7. Spermatozoal ultrastructure in four genera of Homolidae (crustacea, decapoda): Exemplified by Homologenus sp., Latreillopsis sp., Homolomannia sibogae and Paromolosis boasi

    Science.gov (United States)

    Jamieson, B. G. M.; Guinot, D.; Forges, B. Richer De

    1993-10-01

    The spermatozoa of Homologenus sp., Latreillopsis sp., Homolomannia sibogae and Paromolopsis boasi confirm characteristics of a distinctive homolid spermatozoon previously established for Homola sp., Paromola sp. and Paromola petterdi. Homolid features are (1) moderate anteroposterior depression of the acrosome (ratio of length: width 0.4 0.6) as in lyreidine raninids (0.5), depression being greater in dromiids and dynomenids (both 0.3); (2) the capitate form of the perforatorium, shared with dromiids, dynomenids and lyreidine raninids; (3)the autapomorphic spiked-wheel form of the anterior expansion of the perforatorium; (4) horizontal zonation of the acrosome is possibly a unique synapomorphy of homolids with dromiids and dynomenids, and therefore an autapomorphy of the dromioid-homolid assemblage. In dromiids the posterior zone is proportionately the larger, while in homolids the anterior zone is the larger. The anterior zone is complexly subdivided in dynomenids; (5) the autapomorphic presence of numerous radial arranged extension of the acrosomal operculum into the perforatorium; (6) presence of nuclear arms, a symplesiomorphy of all investigated crabs, but small or questionably sometimes absent in Dromiidae; (7) absence of microtubules from the nuclear arms, as in dromiids, raninids, higher heterotremes and thoracotremes; (8) transient presence of a posterior median process of the nucleus. The process is not seen in dromiids but occurs in anomurans and lower heterotremes; (9) apical perforation of the operculum, also seen, apparently symplesiomorphically, in dromiids, raninids, and lower heterotreme families; (10) absence of an acrosome ray zone, probably homoplasic with absence in raninids; (11) location of most of the cytoplasm, including tortuous membranes and degenerating mitochondria, below the acrosome, also seen in Lyreidus; (12) presence, in at least some species, of centrioles, unknown in dromiids and raninids and variable in occurrence in heterotremes.

  8. Three new species of freshwater crabs of the genus Pseudothelphusa (De Saussure, 1857) (Crustacea: Decapoda: Pseudothelphusidae) from Mexico.

    Science.gov (United States)

    Ojeda-Escoto, Juan Carlos; Villalobos, José Luis; Álvarez, Fernando

    2017-01-11

    Three new species of freshwater crabs of the genus Pseudothelphusa (De Saussure, 1857) from south-central Mexico are described: Pseudothelphusa acahuizotla n. sp., P. ixtapan n. sp., and P. purhepecha n. sp. The new species are included in Pseudothelphusa due to a male gonopod with torsion and the presence of the characteristic mesial process and caudomarginal projection. Pseudothelphusa acahuizotla n. sp. is morphologically similar to P. belliana Rathbun, 1898, but can be distinguished by the relative size of the distal lobe of the caudomarginal projection and by the presence of a conical tooth on the caudal surface of the mesial process of the male gonopod. Pseudothelphusa ixtapan n. sp. is similar to P. dilatata Rathbun, 1898, and P. morelosis Pretzmann, 1968, and can be distinguished by a mesial process of the male gonopod with only one lateral tooth and an inferior margin with small teeth. Pseudothelphusa puerhepechae n. sp. exhibits a mesial process of the male gonopod with two triangular spines on its lateral margin, a character that with some variations is present in P. nayaritae Álvarez & Villalobos, 1994, P. rechingeri Pretzmann, 1965, P. lophophallus Rodríguez & Smalley, 1969, and P. parabelliana Álvarez 1989; but it can be distinguished by the separation and shape of the two spines of the mesial process and the shape of the lobes of the caudomarginal projection. With the new species described herein there are now 29 species in the genus Pseudothelphusa.

  9. MEDITS-based information on the deep water red shrimps Aristaeomorpha foliacea and Aristeus antennatus (Crustacea: Decapoda: Aristeidae

    Directory of Open Access Journals (Sweden)

    Angelo Cau

    2002-06-01

    Full Text Available The application of statistical models on a time series of data arising from the MEDITS International Trawl Survey, an experimental demersal resources survey carried out during six years (1994-1999 in the same season of the year (late spring - early summer using the same fishing gear in a large part of the Mediterranean, has allowed for a study to compare, for the first time, the space-time distribution, abundance, and size structure of the two Aristeids Aristaeomorpha foliacea and Aristeus antennatus throughout most of the Mediterranean Sea. This research has shown a large variability among the six reference areas, that were arbitrarily defined within the basin. In particular the two shrimps do not seem to present any correlation or yield continuity in the years. The same lack of homogeneity was also observed in the time trend of the abundances and frequencies of each of the two species. These data seem to confirm the intrinsic variability of the species, the cause of which is still unknown and undocumented. Nevertheless, a longitudinal gradient of catches has been observed where A. antennatus is more abundant in the west and A. foliacea in the east of the basin.

  10. Settlement and juvenile habitat of the European spiny lobster Palinurus elephas (Crustacea: Decapoda: Palinuridae in the western Mediterranean Sea

    Directory of Open Access Journals (Sweden)

    David Díaz

    2001-12-01

    Full Text Available Settlement characteristics, like timing, depth, microhabitat and density of European spiny lobster Palinurus elephas are described for the very first time. Regular SCUBA-diving surveys were conducted from July 1998 to January 2000 on rocky bottoms of three different geologic origins to assess substratum-dependent differences in recruitment density. Settlement of pueruli took place in June-July, a few weeks after sea surface temperature started to rise. The highest density of juveniles was found at 10-15 m depth. Most spiny lobsters settled in limestone rocks, into empty holes of the date mussel Lithophaga lithophaga, which provided daytime refuge. As they grew, individuals were increasingly found in larger holes and crevices of the rock surface. Sizes were estimated from photographs taken at night when the animals were actively foraging. The smallest observed individuals measured 7.5-8 mm carapace length (CL, but they reached 15-18 mm CL at the end of October. The consequences of our results for the management of the spiny lobster populations in the northwestern Mediterranean are summarily discussed.

  11. Two new species of Scyllarid lobsters (Crustacea Decapoda, Palinuridea) from Australia and the Kermadec Islands, New Zealand

    NARCIS (Netherlands)

    Holthuis, L.B.

    1977-01-01

    During the preparation of a revision of the family Scyllaridae, two species from Australian and New Zealand waters were received that proved to be new to science. One belongs to the genus Ibacus, the other to Scyllarus. In order to make the names available to other zoologists working with the

  12. Molecular evidence for the Southern Hemisphere origin and deep-sea diversification of spiny lobsters (Crustacea: Decapoda: Palinuridae).

    Science.gov (United States)

    Tsang, L M; Chan, T-Y; Cheung, M K; Chu, K H

    2009-05-01

    Spiny lobsters (family Palinuridae) are economically important marine animals that have been the subject of a considerable amount of research. However, the phylogeny of this group remains disputed. Morphological analyses have not been able to resolve the relationships of the various members of the group, and no agreement has yet been reached on its phylogeny as indicated by the different gene trees reported to date. In the present study, we attempt to reconstruct the phylogeny of Palinuridae and its allies using sequences from three nuclear protein-coding genes (phosphoenolpyruvate carboxykinase, sodium-potassium ATPase alpha-subunit and histone 3). The inferred topology receives strong nodal support for most of the branches. The family Palinuridae is found to be paraphyletic with the polyphyletic Synaxidae nested within it. Stridentes forms a monophyletic assemblage, indicating that the stridulating sound producing organ evolved only once in the spiny lobsters. By contrast, Silentes is paraphyletic, as Palinurellus is more closely related to Stridentes than to other Silentes genera. The three genera restricted to the southern high latitudes (Jasus, Projasus and Sagmariasus) constitute the basal lineages in the spiny lobsters, suggesting a Southern Hemisphere origin for the group. Subsequent diversification appears to have been driven by the closure of the Tethys Sea and the formation of the Antarctic circumpolar current, which isolated the northern and southern taxa. Contrary to an earlier hypothesis that postulated evolution from a deep-sea ancestral stock, the shallow-water genus Panulirus is the basal taxon in Stridentes, while the deep-sea genera Puerulus and Linuparus are found to be derived. This indicates that the spiny lobsters invaded deep-sea habitats from the shallower water rocky reefs and then radiated. Our results suggest that Synaxidae is not a valid family, and should be considered to be synonymous with Palinuridae. We also found that the previously proposed subgenera Sagmariasus and Nupalirus are genetically highly diverged, and both warrant a generic status.

  13. Evolutionary morphology of the organ systems in squat lobsters and porcelain crabs (crustacea: Decapoda: Anomala): an insight into carcinization.

    Science.gov (United States)

    Keiler, Jonas; Richter, Stefan; Wirkner, Christian S

    2015-01-01

    Porcelain crabs (Porcellanidae) are one of three taxa within anomuran crustaceans (Anomala) which possess a crab-like body form. Curiously, these three lineages evolved this shape independently from true crabs (Brachyura) in the course of the evolutionary process termed carcinization. The entire pleon in porcelain crabs is flexed under the cephalothorax and the carapace is approximately as broad as long. Despite their crab-like habitus, porcelain crabs are phylogenetically nested within squat lobsters (Munidopsidae, Munididae, Galatheidae). With a pleon which is only partly flexed under the cephalothorax and a cephalothorax which is longer than it is broad, squat lobsters represent morphologically intermediate forms between lobster-like and crab-like body shapes. Carcinization has so far mostly been studied with respect to outer morphology; however, it is evident that internal anatomical features are influenced through this change of body shape too. In this paper, the situation in Galatheoidea is elucidated by adding more taxa to existing descriptions of the hemolymph vascular systems and associated structures and organs. Micro-computer tomography and 3D reconstruction provide new insights. Autapomorphic states of various internal anatomical characters are present in nearly all the studied species, also reflecting some degree of anatomical disparity found within Galatheoidea. The ventral vessel system of porcelain crabs differs distinctly from that of squat lobsters. The differences in question are coherent (i.e. structural dependent) with morphological transformations in the integument, such as the shortening of the sternal plastron, which evolved in the course of carcinization. Shifts in the gonads and the pleonal neuromeres are coherent with the loss of the caridoid escape reaction, which in turn is a consequence of carcinization. The arterial transformations, however, are minor compared to other instances of carcinization in anomuran crustaceans since the last common ancestor of squat lobsters and porcelain crabs was already "half carcinized". © 2014 Wiley Periodicals, Inc.

  14. SIFamide peptides in clawed lobsters and freshwater crayfish (Crustacea, Decapoda, Astacidea): a combined molecular, mass spectrometric and electrophysiological investigation.

    Science.gov (United States)

    Dickinson, Patsy S; Stemmler, Elizabeth A; Cashman, Christopher R; Brennan, Henry R; Dennison, Bobbi; Huber, Kristen E; Peguero, Braulio; Rabacal, Whitney; Goiney, Christopher C; Smith, Christine M; Towle, David W; Christie, Andrew E

    2008-04-01

    Recently, we identified the peptide VYRKPPFNGSIFamide (Val(1)-SIFamide) in the stomatogastric nervous system (STNS) of the American lobster Homarus americanus using matrix-assisted laser desorption/ionization-Fourier transform mass spectrometry (MALDI-FTMS). Given that H. americanus is the only species thus far shown to possess this peptide, and that a second SIFamide isoform, Gly(1)-SIFamide, is broadly conserved in other decapods, including another astacidean, the crayfish Procambarus clarkii, we became interested both in confirming our identification of Val(1)-SIFamide via molecular methods and in determining the extent to which this isoform is conserved within other members of the infraorder Astacidea. Here, we present the identification and characterization of an H. americanus prepro-SIFamide cDNA that encodes the Val(1) isoform. Moreover, we demonstrate via MALDI-FTMS the presence of Val(1)-SIFamide in a second Homarus species, Homarus gammarus. In contrast, only the Gly(1) isoform was detected in the other astacideans investigated, including the lobster Nephrops norvegicus, a member of the same family as Homarus, and the crayfish Cherax quadricarinatus, P. clarkii and Pacifastacus leniusculus, which represent members of each of the extant families of freshwater astacideans. These results suggest that Val(1)-SIFamide may be a genus (Homarus)-specific isoform. Interestingly, both Val(1)- and Gly(1)-SIFamide possess an internal dibasic site, Arg(3)-Lys(4), raising the possibility of the ubiquitously conserved isoform PPFNGSIFamide. However, this octapeptide was not detected via MALDI-FTMS in any of the investigated species, and when applied to the isolated STNS of H. americanus possessed little bioactivity relative to the full-length Val(1) isoform. Thus, it appears that the dodeca-variants Val(1)- and Gly(1)-SIFamide are the sole bioactive isoforms of this peptide family in clawed lobsters and freshwater crayfish.

  15. New Records of Hippolytid Shrimps, Lebbeus speciosus and Lebbeus comanthi (Crustacea: Decapoda: Caridea from the East Sea, Korea

    Directory of Open Access Journals (Sweden)

    Chu Lee

    2013-01-01

    Full Text Available Two species of the hippolytid shrimps, Lebbeus speciosus and Lebbeus comanthi, are described and illustrated for the first time in Korea. They were collected from the East Sea. Lebbeus speciosus was found in a scallop farm of Jumunjin, Gangneung, and L. comanthi associated with crinoids, was found in Gampo, Gyeongju. The difference between these two related species is in the number of dorsal teeth of the rostrum, five teeth in L. speciosus and a single tooth in L. comanthi. The Korean Lebbeus species has increased to 6 species by the present report. They are L. grandimana, L. polaris, L. unalaskensis, L. groenlandicus, L. speciosus, and L. comanthi.

  16. Nematocarcinus Milne Edwards, 1881 (Crustacea, Decapoda) from Southwestern Atlantic, including the Southern Mid-Atlantic Ridge area.

    Science.gov (United States)

    Cardoso, Irene A; Burukovsky, Rudolf N

    2014-11-26

    The deep sea shrimp genus Nematocarcinus Milne Edwards, 1881 includes 47 species, ten of them have been recorded from the Atlantic Ocean. Herein, material sampled during three scientific projects (REVIZEE Central Fishery project; Campos Basin Deep Sea Environmental Project; Evaluation of Environmental Heterogeneity in the Campos Basin) made in the Southwestern Atlantic, off Brazil, is examined. In addition, material sampled from the South Mid Atlantic Ridge (MAR-ECO Project) was also examined. Four species are recorded for the first time to the southwestern Atlantic Ocean including Mid Atlantic Ridge area: Nematocarcinus faxoni Burukovsky, 2001; N. gracilipes Filhol, 1884; N. rotundus Crosnier & Forest, 1973 and N. tenuipes Spence-Bate, 1888.

  17. Growth and reproduction of the mangrove crab Goniopsis cruentata (Latreille, 1803) (Crustacea: Decapoda: Grapsidae) in southeastern Brazil.

    Science.gov (United States)

    Reis, Carla R G; Taddei, Fabiano G; Cobo, Valter J

    2015-01-01

    Goniopsis cruentata is a common semi-terrestrial crab in Brazilian mangroves and an important fishery resource for traditional communities in the northeastern Brazilian coast. Aiming to contribute to the knowledge about the species, this study evaluated the carapace width and weight growth curves, the relative growth of weight versus carapace width, and the temporal variation of gonadosomatic and hepatosomatic indices for the species. A total of 524 crabs were collected in a mangrove area of Ubatuba municipality, state of São Paulo. The growth-curves parameters and longevity (tmax) were estimated for males (CW∞=50.6 mm, WE=56.4 g, k=2.24, t0=0.003631502 year-1, tmax=1.3 years) and females (CW∞=50.7 mm, WE∞=58.8 g, k=2.50, t0=0.003247209 year-1, tmax=1.2 years). The age at onset of sexual maturity was 0.23 years for both genders. The weight-growth model was isometric for the immature developmental stages and allometric negative for adults. The species exhibited a continuous reproduction, with breeding peaks in spring and summer months. The weight dynamics of gonads and hepatopancreas were not clearly related. The growth and reproductive patterns indicated that Goniopsis cruentata has a life-history that prioritizes reproduction instead of survival. The species exhibited some of the highest growth rates and lowest longevity estimates reported for brachyuran species in Brazil.

  18. Width-weight relationship and condition factor of Ucides cordatus (Crustacea, Decapoda, Ucididae at tropical mangroves of Northeast Brazil

    Directory of Open Access Journals (Sweden)

    Marina S.L.C. Araújo

    2012-09-01

    Full Text Available The present contribution aims at evaluating the carapace width vs. humid weight relationship and the condition factor of Ucides cordatus (Linnaeus, 1763, in the mangrove forests of the Ariquindá and Mamucabas rivers, state of Pernambuco, Brazil. These two close areas present similar characteristics of vegetation and substrate, but exhibit different degrees of environmental conservation: the Ariquindá River is the preserved area, considered one of the last non-polluted of Pernambuco, while the Mamucabas River suffers impacts from damming, deforestation and deposition of waste. A total of 1,298 individuals of U. cordatus were collected. Males were larger and heavier than females, what is commonly observed in Brachyura. Ucides cordatus showed allometric negative growth (p < 0.05, which is probably related to the dilatation that this species develops in the lateral of the carapace, which stores six pairs of gills. The values of b were within the limit established for aquatic organisms. Despite of the condition factor being considered an important feature to confirm the reproductive period, since it varies with cyclic activities, in the present study it was not correlated to the abundance of ovigerous females. However, it was considered a good parameter to evaluate environmental impacts, being significantly lower at the impacted area.

  19. Growth and reproduction of the mangrove crab Goniopsis cruentata (Latreille, 1803 (Crustacea: Decapoda: Grapsidae in southeastern Brazil

    Directory of Open Access Journals (Sweden)

    Carla R.G. Reis

    2015-06-01

    Full Text Available Goniopsis cruentata is a common semi-terrestrial crab in Brazilian mangroves and an important fishery resource for traditional communities in the northeastern Brazilian coast. Aiming to contribute to the knowledge about the species, this study evaluated the carapace width and weight growth curves, the relative growth of weight versus carapace width, and the temporal variation of gonadosomatic and hepatosomatic indices for the species. A total of 524 crabs were collected in a mangrove area of Ubatuba municipality, state of São Paulo. The growth-curves parameters and longevity (tmax were estimated for males (CW∞=50.6 mm, WE=56.4 g, k=2.24, t0=0.003631502 year-1, tmax=1.3 years and females (CW∞=50.7 mm, WE∞=58.8 g, k=2.50, t0=0.003247209 year-1, tmax=1.2 years. The age at onset of sexual maturity was 0.23 years for both genders. The weight-growth model was isometric for the immature developmental stages and allometric negative for adults. The species exhibited a continuous reproduction, with breeding peaks in spring and summer months. The weight dynamics of gonads and hepatopancreas were not clearly related. The growth and reproductive patterns indicated that Goniopsis cruentata has a life-history that prioritizes reproduction instead of survival. The species exhibited some of the highest growth rates and lowest longevity estimates reported for brachyuran species in Brazil.

  20. Changes in the nitric oxide system in the shore crab Hemigrapsus sanguineus (Crustacea, Decapoda) CNS induced by a nociceptive stimulus.

    Science.gov (United States)

    Dyuizen, Inessa V; Kotsyuba, Elena P; Lamash, Nina E

    2012-08-01

    Using NADPH-diaphorase (NADPH-d) histochemistry, inducible nitric oxide synthase (iNOS)-immunohistochemistry and immunoblotting, we characterized the nitric oxide (NO)-producing neurons in the brain and thoracic ganglion of a shore crab subjected to a nociceptive chemical stimulus. Formalin injection into the cheliped evoked specific nociceptive behavior and neurochemical responses in the brain and thoracic ganglion of experimental animals. Within 5-10 min of injury, the NADPH-d activity increased mainly in the neuropils of the olfactory lobes and the lateral antenna I neuropil on the side of injury. Later, the noxious-induced expression of NADPH-d and iNOS was detected in neurons of the brain, as well as in segmental motoneurons and interneurons of the thoracic ganglion. Western blotting analysis showed that an iNOS antiserum recognized a band at 120 kDa, in agreement with the expected molecular mass of the protein. The increase in nitrergic activity induced by nociceptive stimulation suggests that the NO signaling system may modulate nociceptive behavior in crabs.

  1. Salmoneus kekovae, a new species of alpheid shrimp (Crustacea: Decapoda: Caridea from the south-western coast of Turkey

    Directory of Open Access Journals (Sweden)

    G. GRIPPA

    2004-12-01

    Full Text Available A new species of Salmoneus collected in Turkish waters is described. It appears to live in burrows associated with gobiid fish or thalassinidean decapods, as do other species in the genus. Previously, twenty Salmoneus species have been recognised worldwide, two of which are known from the Mediterranean. Some morphological features are discussed in order to determine their taxonomic value. A table summarises the geographical distribution of the 21 species currently recognised.

  2. A new species of portunid crab of the genus Charybdis (De Haan, 1833) (Crustacea: Decapoda: Brachyura) from Goa, India

    Digital Repository Service at National Institute of Oceanography (India)

    Padate, V.P.; Rivonker, C; Anil, A.C; Sawant, S.S.; Venkat, K.

    A new species of portunid crab, Charybdis (Charybdis) goaensis sp. nov. is described from Goa, west coast of India. It differs from its closest congener, Charybdis (Charybdis) philippinensis in possessing bluntly triangular median frontal teeth...

  3. Pontonides sympathes, a new species of commensal shrimp (Crustacea, Decapoda, Pontoniinae) from Antipatharia in the Galapagos Islands

    NARCIS (Netherlands)

    Ridder, de Ch.; Holthuis, L.B.

    1979-01-01

    During a stay at the Galapagos Islands (1975-1976), one of us (Ch. de Ridder) made a study of Gorgonaria and Antipatharia, paying special attention to commensals found with these corals. On Antipathes galapagensis Deichmann, 1941, a species of the pontoniine shrimp genus Pontonides was observed,

  4. A new early brachyuran (Crustacea, Decapoda) from the Middle Jurassic of northwest France, epibionts and ecological considerations

    NARCIS (Netherlands)

    Robin, N.; Bakel, van B.W.M.; Hondt, d' J.-L.; Charbonnier, S.

    2015-01-01

    The earliest known crabs are of Early and Middle Jurassic age; in general, they are rare. Here we describe a new species of homolodromioid from the late Bathonian of Sarthe (France), based on a single dorsal carapace, Tanidromites raboeufi n. sp. This specimen has mostly well-preserved cuticle, and

  5. Breeding biology of shrimp Parapenaeopsis stylifera (Milne Edwards) (Crustacea: Decapoda) along the Neendakara zone, SW coast of India

    Digital Repository Service at National Institute of Oceanography (India)

    Sunil, V.; Suryanarayanan, H.

    showing that they spawn continuously the peak season being May and July. The gonado-somatic index exhibited a variation from 3.39 to 10.54(%). The mean fecundity of 87,641 was observed. There was a linear relationship between the fecundity and the length...

  6. A new species of Pagurus (Crustacea: Decapoda: Paguridae, new records and a redescription of hermit crabs from the Mexican Pacific

    Directory of Open Access Journals (Sweden)

    Manuel Ayón-Parente

    2012-09-01

    Full Text Available New records are provided for three species of little-known pagurids. All the material reported was collected by the R/V “El Puma” in the central Gulf of California during the GUAYTEC II cruise. New material is reported for Iridopagurus haigae García-Gómez, 1983, Enallopagurus spinicarpus (Glassell, 1937, and Solenopagurus diomedeae (Faxon, 1893, and these two latter species are redescribed. A new species of hermit crab of the genus Pagurus Fabricius, 1775, is described and illustrated in detail. Among the eastern Pacific species of Pagurus, this new species resembles Pagurus meloi Lemaitre and Cruz Castaño, 2004, P. imarpe Haig, 1974 and P. delsolari Haig, 1974, but differs from these three species in the armature and setation of the chelipeds and second and third pereopods, the shape and armature of the telson, and the number of rows of scales on pereopodal rasp and the presence of a preungual process.

  7. A new cavernicolous freshwater crab, Thelphusula styx sp. nov. (Crustacea: Decapoda: Brachyura: Gecarcinucidae), from Gunong Mulu, Sarawak, Borneo

    NARCIS (Netherlands)

    Ng, P.K.L.

    1989-01-01

    A new species of gecarcinucid freshwater crab, Thelphusula styx spec. nov., is described from Gunong Mulu National Park in Sarawak, Borneo. This is the third species of Thelphusula reported from the area.

  8. A new species of troglobitic crab of the genus Stygothelphusa Ng, 1989, from Sarawak, Malaysia (Crustacea: Decapoda: Brachyura: Gecarcinucidae).

    Science.gov (United States)

    Ng, Peter K L; Grinang, Jongkar

    2014-03-04

    A new species of cave crab, Stygothelphusa antu new species, is described from limestone formations in Temurang, Sarawak, Malaysia. The new species is the most highly adapted to a cavericolous lifestyle among the four known species of Stygothelphusa, having a pale body pigmentation, reduced eyes and elongated pereopods. In contrast, the other three species have normal eyes that almost completely fill the orbits. The new species also differs from its congeners by a number of carapace, pereopod and gonopod characters.

  9. The complex evolutionary history and phylogeography of Caridina typus (Crustacea: Decapoda): long-distance dispersal and cryptic allopatric species.

    Science.gov (United States)

    Bernardes, Samuel C; Pepato, Almir R; von Rintelen, Thomas; von Rintelen, Kristina; Page, Timothy J; Freitag, Hendrik; de Bruyn, Mark

    2017-08-22

    The evolutionary history of the old, diverse freshwater shrimp genus Caridina is still poorly understood, despite its vast distribution - from Africa to Polynesia. Here, we used nuclear and mitochondrial DNA to infer the phylogeographic and evolutionary history of C. typus, which is one of only four species distributed across the entire range of the genus. Despite this species' potential for high levels of gene flow, questions have been raised regarding its phylogeographic structure and taxonomic status. We identified three distinct lineages that likely diverged in the Miocene. Molecular dating and ancestral range reconstructions are congruent with C. typus' early dispersal to Africa, possibly mediated by the Miocene Indian Ocean Equatorial Jet, followed by back dispersal to Australasia after the Jet's closure. Furthermore, several different species delimitation methods indicate each lineage represents a distinct (cryptic) species, contradicting current morphospecies delimitation of a single C. typus taxon. The evolutionary history of C. typus lineages is complex, in which ancient oceanic current systems and (currently unrecognised) speciation events preceded secondary sympatry of these cryptic species.

  10. Prediction of the neuropeptidomes of members of the Astacidea (Crustacea, Decapoda) using publicly accessible transcriptome shotgun assembly (TSA) sequence data.

    Science.gov (United States)

    Christie, Andrew E; Chi, Megan

    2015-12-01

    The decapod infraorder Astacidea is comprised of clawed lobsters and freshwater crayfish. Due to their economic importance and their use as models for investigating neurochemical signaling, much work has focused on elucidating their neurochemistry, particularly their peptidergic systems. Interestingly, no astacidean has been the subject of large-scale peptidomic analysis via in silico transcriptome mining, this despite growing transcriptomic resources for members of this taxon. Here, the publicly accessible astacidean transcriptome shotgun assembly data were mined for putative peptide-encoding transcripts; these sequences were used to predict the structures of mature neuropeptides. One hundred seventy-six distinct peptides were predicted for Procambarus clarkii, including isoforms of adipokinetic hormone-corazonin-like peptide (ACP), allatostatin A (AST-A), allatostatin B, allatostatin C (AST-C) bursicon α, bursicon β, CCHamide, crustacean hyperglycemic hormone (CHH)/ion transport peptide (ITP), diuretic hormone 31 (DH31), eclosion hormone (EH), FMRFamide-like peptide, GSEFLamide, intocin, leucokinin, neuroparsin, neuropeptide F, pigment dispersing hormone, pyrokinin, RYamide, short neuropeptide F (sNPF), SIFamide, sulfakinin and tachykinin-related peptide (TRP). Forty-six distinct peptides, including isoforms of AST-A, AST-C, bursicon α, CCHamide, CHH/ITP, DH31, EH, intocin, myosuppressin, neuroparsin, red pigment concentrating hormone, sNPF and TRP, were predicted for Pontastacus leptodactylus, with a bursicon β and a neuroparsin predicted for Cherax quadricarinatus. The identification of ACP is the first from a decapod, while the predictions of CCHamide, EH, GSEFLamide, intocin, neuroparsin and RYamide are firsts for the Astacidea. Collectively, these data greatly expand the catalog of known astacidean neuropeptides and provide a foundation for functional studies of peptidergic signaling in members of this decapod infraorder. Copyright © 2015 Elsevier Inc. All rights reserved.

  11. First occurrence of a Hymenosomatid crab Elamena mathoei (Desmarest, 1823 (Crustacea: Decapoda: Brachyura in the Mediterranean Sea

    Directory of Open Access Journals (Sweden)

    J. ZAOUALI

    2013-04-01

    Full Text Available Mediterranean fauna is undergoing drastic modifications as a result of anthropogenic activities and global warming. The most important of these is the colonization of the Mediterranean Sea by alien species, many of them entering through the Suez Canal. While many of them are still confined to the Levant Basin, several have extended their distribution westwards to Tunisian waters. The presence of the Indo-west Pacific hymenosomatid crab Elamena mathoei on a rocky shore at Sidi Daoud, Cape Bon Peninsula, Tunisia, is the first Mediterranean record of this species. It is a testimony to the changes in the patterns of invasion in the Mediterranean Sea.

  12. Two new species of shrimp of the Indo-West Pacific genus Hamodactylus Holthuis, 1952 (Crustacea: Decapoda: Palaemonidae

    Directory of Open Access Journals (Sweden)

    Ivona HORKÁ

    2016-04-01

    Full Text Available Two new alcyonacean-associated species, Hamodactylus paraqabai sp. nov. from Papua New Guinea and the Great Barrier Reef and H. pseudaqabai sp. nov. from Indonesia and Malaysia, are described and illustrated. To evaluate the status of the new species and their relationship within the genus Hamodactylus Holthuis, 1952, we combined morphology and phylogenetic analyses based on the cytochrome c oxidase subunit I (COI mitochondrial gene. Both new species are closely related, with their mutual genetic divergence reaching 3-4%. They are further most related to Hamodactylus aqabai Bruce & Svoboda, 1983, originally described from the Red Sea. Both new species are distinguished from all other congeners by the presence of multiple teeth distally on the cutting edges of the fingers of the first pereiopods, and, in the case of H. paraqabai sp. nov., by a full reduction of the fixed finger on the second pereiopod chela. In H. pseudaqabai sp. nov. the finger is greatly reduced to a small but distinct stub, and the telson bears only a single pair of dorsal spines, as in H. aqabai. A key for the identification of all six currently known species is proposed.

  13. Clythrocerus carinatus Coelho, 1973 (Crustacea: Decapoda primer registro de una especie de la familia Tymolidae para el Caribe colombiano

    Directory of Open Access Journals (Sweden)

    Campos Néstor Hernando

    1995-11-01

    Full Text Available La subfamilia Tymolinae fue elevada recientemente a la categoría de familia, separándola de la Dorippidae, de acuerdo con lo expuesto por Wear & Batham (1975 y asumido por Bowman & Abele (1982 Y Williams (1984. La familia Tymolidae está constituida por un grupo de cangrejos, cercanos sistemáticamente a la familia Dromiacea, dentro de la que se destacan los del género Clythrocerus. A pesar de ser un grupo dedistribución tropical principalmente (Wear & Batam, 1975, no había sido registrada ninguna especie para el Caribe colombiano.

  14. Morfología comparada del esqueleto axial en la familia de cangrejos de agua dulce Trichodactylidae (Crustacea: Decapoda: Brachyura

    Directory of Open Access Journals (Sweden)

    Manuel Pedraza

    2015-07-01

    Full Text Available El esqueleto axial es una estructura compleja de origen cuticular, formada a partir de las láminas esclerotizadas de los esternitos y pleuritos torácicos así como por sus invaginaciones internas. Los caracteres de la parte ventral del esqueleto axial, que se reflejan externamente en las líneas de sutura del esternón torácico, son criterios importantes en el actual sistema de supragenerico de Trichodactylidae: (Trichodactylinae y Dilocarcininae (Dilocarcinini + Valdiviini. Con el objetivo de probar esa hipótesis de clasificación fue realizado el estudio anatómico del esqueleto axial de 43 individuos adultos, tanto machos como hembras, pertenecientes a 17 especies de 10 géneros de Trichodactylidae. Para la preparación del material, los individuos fueron diseccionados y sus esqueletos sumergidos, por un periodo de 24 a 48 horas, en una solución caliente de Hidróxido de Potasio (KOH. El análisis anatómico permitió describir un grupo de variaciones en la forma, orientación y conformación del esternón torácico, techo pleural, fragmas ventrales y dorsales, así como de la lámina de unión. De acuerdo con esas características las especies estudiadas fueron reunidas en tres grupos, siendo esas agrupaciones consistentes con la actual propuesta de clasificación de Trichodactylidae en subfamilias y tribus. El presente trabajo resalta la importancia informativa de la morfología del esqueleto axial para la taxonomía de Trichodactylidae.

  15. Infeccion natural de Ptychophallus tristani (Crustacea: decapoda con metacercarias de Paragonimus mexicanus (Trematoda en Tabarcia de Mora, Costa Rica

    Directory of Open Access Journals (Sweden)

    Eduardo Monge

    1985-02-01

    Full Text Available Se determinó el grado de infección de los crustáceos Ptychophallus tristani presentes en una área endémica de Paragonimus mexicanus, encontrándose que de un total de 182 cangrejos, 161 resultaron positivos (88,5% por metacercarias. Al comparar la infección entre machos y hembras no se encontró diferencias estadísticamente significativas y en relación a su tamaño se observó una relación directa entre tamaño y porcentaje y grado de infección. Se estableció que no existen diferencias significativas en relación a la época del año en que los cangrejos fueron capturados lo que epidemiológicamente es importante pues indica que las fuentes de infección permanecen potencialmente activas durante todo el año.

  16. Recurrence of a marine brachyuran crab, Parapanope euagora (Crustacea: Decapoda: Brachyura: Galenidae from East Coast of India

    Directory of Open Access Journals (Sweden)

    C. Viswanathan

    2013-06-01

    Full Text Available Study on the occurrence and distribution of unusual crab species is a matter of fascination for carcinalogists. The present study reports the recurrence of a marine brachyuran crab species Parapanope euagora, of the family Galenidae, after a long period along the East coast of India. During a routine survey, three female ovigerous specimens are caught from Parangipettai coastal waters, southeast coast of India. From the results, after more than ten decades, the species, Parapanope euagora has reappeared in Indian coast revealing its possible, continued existence in Indian waters.

  17. A new species of palaemonid shrimp, Chacella tricornuta spec. nov (Crustacea: Decapoda: Palaemonidae) from the southeastern Gulf of California, Mexico

    NARCIS (Netherlands)

    Hendrickx, M.E.

    1990-01-01

    A new species of the palaemonid shrimp genus Chacella Bruce is described from the Gulf of California, Mexico, in the eastern Pacific, and represents the second known species of this genus. The type-species, Chacella kerstitchi (Wicksten, 1983), was described from a single female captured off the

  18. A new species of the ghost shrimp genus Lepidophthalmus (Crustacea: Decapoda: Axiidea) from the southwestern Gulf of Mexico.

    Science.gov (United States)

    Felder, Darryl L

    2015-07-13

    A new species of Lepidophthalmus lacking a ventral median sclerite on the second abdominal somite is described from coastal waters of the southwestern Gulf of Mexico. Lepidophthalmus statoni sp. nov., originally recognized only as a unique population in allozyme studies, is sympatric with the ventrally plated species Lepidophthalmus manningi Felder & Staton, 2000, but more closely resembles Lepidophthalmus louisianensis (Schmitt, 1935) from the northern and northwestern Gulf of Mexico. Apparently restricted to intertidal and shallow subtidal tropical waters, the new species is known to range from western Campeche to middle-upper reaches of Veracruz, Mexico. As many members of the genus, it commonly inhabits euryhaline inlets, estuaries, and protected shorelines, including richly organic muddy to clayey sands and sandy muds adjacent to shoreline vegetation. Coloration is documented and discussed as a tool to facilitate field identifications, as are morphological characters.

  19. Comparison between the shrimp species richness (Caridea and Dendrobranchiata, Decapoda, Crustacea of the south and north mid Atlantic ridge

    Directory of Open Access Journals (Sweden)

    Irene Azevedo Cardoso

    2014-03-01

    Full Text Available The Mid Atlantic Ridge (MAR is a seamount chain extending for 60.000 km, divided into south and north regions by the Equatorial Fracture which cuts across it. This latter has a maximum depth of 7,760 m and an average width of 19 km. In this study we include data from the two cruises of the international project MAR-ECO, undertaken, respectively, one on the north and the other on the south MAR. Our main objective is to compare the species richness and species composition of pelagic and benthic decapod shrimps of these two areas to observe the patterns of their latitudinal distribution along the MAR. Using rarefaction methods, we obtained interesting results: the pelagic samples curve of the northern MAR is almost an asymptote, so we concluded that we are close to the true number of pelagic shrimp species for this region. The pelagic samples curve of the southern MAR had the greatest slope, so our conclusion is that we are still far from the true number of species for this region. A comparison of species richness at 12 samples (the smallest number of samples shared by both the surveys revealed that the pelagic species richness was greater than the demersal, and that the northern MAR contained a larger number of species than the southern.

  20. Two new species and new records of Microprosthema Stimpson, 1860 (Crustacea: Decapoda: Stenopodidea: Spongicolidae) from the Indo-West Pacific.

    Science.gov (United States)

    Saito, Tomomi; Anker, Arthur

    2014-08-28

    Two new species of the spongicolid shrimp genus Microprosthema Stimpson, 1860 are described and illustrated on the basis of material collected recently in Australia and Japan. Type specimens of Microprosthema ningaloo sp. nov. were collected on Ningaloo Reef, Western Australia, whereas type specimens of Microprosthema pallidum sp. nov. were collected on a coral reef off Ishigaki Island, Ryukyu Archipelago, southern Japan. Microprosthema ningaloo sp. nov. and M. pallidum sp. nov. differ from all other species of the genus by a combination of morphological characters, including the gill-exopod formulae, and by their diagnostic colour patterns. This study increases the total number of species described in the genus Microprosthema to 16, nine of them in the Indo-West Pacific. In addition, new records are provided for M. lubricum Saito & Okuno, 2011 (Guam), M. plumicorne (Richters, 1880) (Red Sea, Mariana and Marshall Islands, French Polynesia), M. scabricaudatum (Richters, 1880) (Red Sea, Glorieuses and Tuamotu Islands), and M. validum Stimpson, 1860 (Red Sea, Madagascar, Singapore, French Polynesia), significantly extending their previously known distribution ranges. 

  1. Comparative study of freshwater crayfish, Cherax spp. (crustaceae: decapoda: parastacidae) from Papua, Indonesia based on length-weight analysis

    Science.gov (United States)

    Hamidah, H.; Abinawanto, Bowolaksono, A.

    2017-07-01

    The freshwater crayfish is one of the most important fish species as the protein resources. Lake and rivers are the habitat of crayfish in Papua. Morphological characters of crayfish, such as color, total body lengths (L) and body weight (W) were influenced by the habitat. The purpose of the study, therefore, was to compare the total body length and body weight as well as the unique color of crayfish from Uter lake (Atinjo district), Seremuk river (Haha village), Baliem river (Pike village; Hubukiak district, Jayawijaya), and Baliem river (Wesaput village; Wesaput district). Length-weight (body length; LB versus wet weight; WWT) relationships were determined for male and female crayfish (Cherax spp.) The length-weight relationships of total individuals was W = 0,022215.L3,159. This regression differed significantly (R2 = 97.5 %) between locations. Both males and females exhibited positive allometric growth as statistical difference was observed in the mean of the wet weight and body length between males and females. Besides, Canonical function was subjected to determine population distribution based on length-weight data.

  2. Postsettlement growth of two estuarine crab species, Chasmagnathus granulata and Cyrtograpsus angulatus (Crustacea, Decapoda, Grapsidae): laboratory and field investigations

    Science.gov (United States)

    Luppi, T. A.; Spivak, E. D.; Anger, K.

    2002-02-01

    The estuarine grapsid crabs Chasmagnathus granulata and Cyrtograpsus angulatus belong to the most typical and dominant inhabitants of brackish coastal lagoons in southeastern South America. In a combined laboratory and field investigation of juvenile growth, we measured the increase in body size in these species under controlled conditions as well as in field experiments (in Mar Chiquita lagoon, Argentina), seasonal changes in size frequency distribution of a natural population, and growth related changes in selected morphometric traits of male and female juveniles (relations between carapace width, carapace length, propodus height and length of the cheliped, and pleon width). At 24°C, Cy. angulatus grew faster than Ch. granulata; it reached the crab-9 instar (C9; 13 mm carapace width) after 92 days, while Ch. granulata required 107 days to reach the C8 instar (7.4 mm). At 12°C, growth ceased in both species. The pleon begins to show sexual differences in the C5 ( Cy. angulatus) and C8 instar ( Ch. granulata), respectively, while the chelae differentiate earlier in Ch. granulata than in Cy. angulatus (in C4 vs C6). In the field, growth was maximal in summer, and was generally faster than in laboratory cultures. However, there is great individual variability in size (about 25% even in the first crab instar) and in size increments at ecdysis, increasing throughout juvenile growth. Our data indicate that, in the field, small-scale and short-term variations in feeding conditions, temperature, and salinity account for an extremely high degree of variability in the absolute and relative rates of growth as well as in the time to sexual differentiation.

  3. New Report of Two Species of Crabs, Cycloes granulosa and Pugettia vulgaris (Crustacea: Decapoda Collected from Korea

    Directory of Open Access Journals (Sweden)

    Yang, Kea Cheong

    2015-07-01

    Full Text Available Two species of crabs, Cycloes granulosa and Pugettia vulgaris, are described and illustrated for the first time in Korea. The former is the first species of calappoid genus Cycloes and characterized by having a minute lateral spine on the margin of carapace. The latter is a species of majoid crab and similar to P. pellucens. However, it can be distinguished by shorter rostral spines, a smaller hepatic spine, and a carapace entirely covered with short setae. In Korea the calappoid crab now includes seven species of three genera (Calappa, Mursia, and Cycloes and the majoid genus Pugettia consists of six species.

  4. A new species of stygobitic freshwater crab of the genus Rodriguezia Bott, 1969 (Crustacea: Decapoda: Trichodactylidae) from Tabasco, Mexico.

    Science.gov (United States)

    Alvarez, Fernando; Villalobos, JosÉ Luis

    2018-02-07

    A new species of freshwater crab of the family Trichodactylidae, genus Rodriguezia Bott, 1969 is described from Grutas de Agua Blanca in southern Tabasco, Mexico. Rodriguezia is a genus endemic to northern Chiapas and southern Tabasco, distributed over a small area of 70 km. Rodriguezia adani n. sp., the third species of the genus, occurs north of its two congeners, being stygobitic with obvious adaptations to cave life. It can be distinguished from R. villalobosi, an epigean species, by the absence of eyes, lack of pigmentation and elongation of the pereiopods; and from R. mensabak by having less elongated pereiopods relative to carapace breadth, an extremely reduced ocular peduncle, and a smaller adult size.

  5. Scyllarides obtusus spec. nov., the scyllarid lobster of Saint Helena, Central South Atlantic (Crustacea: Decapoda Reptantia: Scyllaridae)

    NARCIS (Netherlands)

    Holthuis, L.B.

    1993-01-01

    A new species of slipper lobster is described from Saint Helena, where the species seems to be endemic. Known under the vernacular name Stump, the species forms the subject of a local fishery, carried out since early times. Previously the species has been identified with various Scyllarides species

  6. Postlarval development of Halicarcinus planatus females (Crustacea, Decapoda, Hymenosomatidae in the estuary of the Deseado River, Argentina

    Directory of Open Access Journals (Sweden)

    Julio H. Vinuesa

    2008-03-01

    Full Text Available This study analyses morphology and morphometric growth changes of Halicarcinus planatus females until their terminal moult, and characterises new juvenile stages. Monthly samples were collected in the estuary of the Deseado River, Santa Cruz Province, Argentina. Crabs were sampled between the mid-intertidal and upper subtidal levels. Intermoult stages were analysed in sub-samples of adolescents and adults, and the presence of epizoic organisms was registered. Juveniles and adults were reared at the laboratory and examined for moult changes. All 3376 crabs caught were females, indicating a clear spatial segregation between sexes. Five juvenile stages (immature 1, 2, 3, 4 and adolescent and a mature one were recognised on the basis of morphology and morphometry. All immature stages differed in cephalothorax width (CW and abdomen width (AW. Positive allometry was observed in some juvenile stages and isometry in an immature stage and in mature females. Adolescents and adults encompassed a wide range of sizes, and the considerable size overlap between them suggests an anomalous growth process. Moult staging analysis indicated that adolescents have a high incidence of pre-moult stages in winter, when the terminal moult occurs. The measurements performed in laboratory-reared females indicated no abnormal increases during the moult. The terminal moult occurs within a wide size range, perhaps in association with mating.

  7. The trophic position of the alien crab Rhithropanopeus harrisii (crustacea decapoda panopeidae) in the Taman Bay, Sea of Azov community

    Science.gov (United States)

    Zalota, A. K.; Kolyuchkina, G. A.; Tiunov, A. V.; Biriukova, S. V.; Spiridonov, V. A.

    2017-03-01

    This work concerns the trophic web positioning of the alien crab Rhithropanopeus harrisii and other common marine invertebrate species and fishes in the benthic ecosystem of the shallows of Taman Bay, Sea of Azov. The base of the trophic web in this system is composed of phytoplankton, macrophytes (algae and marine grasses), and reeds that use atmospheric carbon for photosynthesis. Analysis of the isotopic composition of nitrogen and carbon has shown that although marine grasses are dominating primary producers in the shallows of the bay, primary consumers (such as Cerastoderma glaucum, Porifera gen. sp., Gammarus aequicauda, Deshayesorchestia deshayesii and Idotea balthica) only partially use this organic source; instead, they use a combination of different sources of primary production. It has been shown that the food source of the alien crab is primarily of animal origin. In Taman Bay, R. harrisii is on the same trophic level as other carnivores/scavengers: benthic fishes Syngnathus nigrolineatus, Gobius spp. and native crab Pilumnus hirtellus and shrimp Palaemon adspersus.

  8. Gastroptychus Cavimurus sp. nov., a new Chirostylid (Crustacea, Decapoda, Anomura) from off the western coast of South America

    NARCIS (Netherlands)

    Baba, K.

    1977-01-01

    During the second cruise of the Japanese Research Vessel "Kaiyo Maru" to the western coast of South America in 1968-69, Dr. Osame Tabeta of the Shimonoseki University of Fisheries, then on the staff of the Kyushu University, collected a number of galatheids off the northern Peruvian coast. All of

  9. Morphological and molecular features of some freshwater prawn species under genus Macrobrachium Spence Bate, 1868 (Crustacea: Decapoda: Palaemonidae) from Myanmar.

    Science.gov (United States)

    Mar, Win; Kang, Peng-Fei; Mao, Bin; Wang, Yu-Feng

    2018-02-28

    Myanmar is abundant in lakes and rivers, yet only a few investigations on the fauna of shrimps and prawns have been conducted and no molecular characteristics of prawn species have been described. This study reveals the morphologically identification of five freshwater prawn species under the genus Macrobrachium, including M. cavernicola, M. australiense, M. johnsoni, M. josephi and Macrobrachium sp.WMY-2017. As there was no previous record and information concerning with M. australiense, M. johnsoni, M. josephi and Macrobrachium sp. WMY-2017, they were regarded as the first record from Myanmar. A fragment of Mitochondrial Cytochrome Oxidase I Gene (COI) was amplified successfully from three studied species: M. australiense, M. josephi, and Macrobrachium sp.WMY-2017. The interspecific divergences of studied species varied from 0.01 to 0.15. The phylogenetic tree based on COI fragment sequences showed that M. australiense was closely related to M. rosenbergii, while Macrobrachium sp. WMY-2017 was closest to M. josephi. The results of molecular phylogeny has clarified the relationship within the genus Macrobrachium and represents the first step toward understanding the pattern of speciation base on molecular approach in Myanmar.

  10. Habitat Preferences and Distribution of the Freshwater Shrimps of the Genus Caridina (Crustacea: Decapoda: Atyidae in Lake Lindu, Sulawesi, Indonesia

    Directory of Open Access Journals (Sweden)

    Annawaty Annawaty

    2016-04-01

    Full Text Available The objectives of this study were to reveal ecological preferences and distribution of all species of Caridina found in Lake Lindu and their catchment area. Specimens from 39 sampling sites were caught using tray net and hand net. There are three species of Caridina found in the lake system, i.e. Caridina linduensis, Caridina kaili and Caridina dali. There is no overlapping distribution among the species. Caridina kaili is a true riverine species and it is never encountered sympatric with C. dali nor C. linduensis. This species is abundant in streams and ditches with moderate flow running water and gravel–cobble substrate. It is mainly spread within streams west to the lake. Both C. dali and C. linduensis can be found in the lake and streams with very slow current to almost stagnant water, muddy sand substrate and associated with roots of water plants and leaf litter. However, C. dali is never occurred together with C. linduensis and they are less abundant compare to C. kaili. Distribution of Caridina spp. in Lake Lindu is probably affected by the temperature of their habitats and the occurrence of introduced fish such as Mozambique tilapia (Oreochromis mossambicus, common carp (Cyprinus carpio, and an alien riceland prawn (Macrobrachium lanchesteri. These introduced and alien species can have the potency to become predators or competitors for the Caridina spp. It is also the first record for M. lanchesteri present in Lake Lindu.

  11. Gonioinfradens paucidentatus (A. Milne Edwards, 1861 (Crustacea, Decapoda, Portunidae: a new alien crab in the Mediterranean Sea

    Directory of Open Access Journals (Sweden)

    M. CORSINI-FOKA

    2010-11-01

    Full Text Available The first record for the Mediterranean Sea of the Red Sea/Indo-Pacific portunid Gonioinfradens paucidentatus (red swimming crab is documented. A detailed description of the specimens collected at Rodos Island (southeastern Aegean Sea is given, while possible introduction vectors of the species in the area are discussed.

  12. The recent genera of the Caridean and Stenopodidean shrimps (class Crustacea, order Decapoda, supersection Natantia) with keys for their determination

    NARCIS (Netherlands)

    Holthuis, L.B.

    1955-01-01

    CONTENTS Introduction.......... 1 Supersection Natantia ...... 2 Section Caridea....... . 7 Superfamily Oplophoroida ... 12 Family Oplophoridae .... 12 Family Nematocarcinidae . . 17 Family Atyidae ..... 18 Superfamily Stylodactyloida . . 31 Family Stylodactylidae ... 31 Superfamily Pasiphaeoida . .

  13. Beitrag zur Kenntnis und Verbreitung von Galathea Australiensis Stimpson, 1858, (Crustacea Decapoda, Anomura, Galatheidae) nebst Beschreibung eines Neotypus

    NARCIS (Netherlands)

    Lewinsohn, Ch.

    1967-01-01

    Anlässlich der Vorbereitung einer Publikation über die Anomuren des Roten Meeres, wurde u.a. auch Material der Gattung Galathea dieser Region untersucht. Dabei ergab sich das Problem einer richtigen Bestimmung von Galathea australiensis Stimpson, 1858. Diese Art wurde von Balss (1915: 2-3), an Hand

  14. A new species of the genus Kingsleya from Amazonia, with a modified key for the Brazilian Pseudothelphusidae (Crustacea: Decapoda: Brachyura)

    NARCIS (Netherlands)

    Magalhaes, C.

    1990-01-01

    Abstract: A new species of Pseudothelphusid crab, Kingsleya besti spec. nov., is described from Serra do Curicuriari, northwest of the State of Amazonas, Brazil. A modified dey for identification of the Pseudothelphusid crabs occurring in Brazil is given. Resumo: É descrita uma nova espécie de

  15. Setal morphology of the grooming appendages of Macrobrachium rosenbergii (Crustacea: Decapoda: Caridea: Palaemonidae) and review of decapod setal classification.

    Science.gov (United States)

    Wortham, Jennifer L; Vanmaurik, Lauren N; Wayne Price, W

    2014-06-01

    Setae are vital in grooming activities and aiding in the removal of epibionts and sedimentary fouling from the body surfaces of decapod crustaceans. Thus, the setal structures and their arrangement on the grooming appendages and sensory structures of the commercially important shrimp, Macrobrachium rosenbergii, were examined using scanning electron microscopy. Macrobrachium rosenbergii is extensively grown in aquaculture and exhibits unique male morphological forms, termed morphotypes. The three male morphotypes are termed blue-clawed males, orange-clawed males, and small-clawed or undifferentiated males and all three differ in their dominance, behavior, body morphology, and reproductive success. Seven setal types, two of which have never been described in the literature, are identified on the grooming appendages (third maxillipeds, first, second, and fifth pereopods) and antennae: simple, serrate, serrulate, spiniform, pappose, crinoid, and spinulate. The latter two setae are newly identified. Certain setal types, such as serrate and serrulate setae were located and associated with specific grooming appendages such as the first pereopods. The types of setae on the grooming appendages varied among females and male morphotypes and the novel setal types (crinoid and spinulate) were found only on two of the male morphotypes. A literature review of terminology related to the structure of setae and setal types in decapod crustaceans is offered as the usage of various terms is ambiguous and conflicting in the literature. The intention of this review is to provide future authors with a comprehensive collection of terms and images that can be used to describe various aspects of setal morphology in decapods. Copyright © 2014 Wiley Periodicals, Inc.

  16. Ultrastructure of spermatozoa of spider crabs, family Mithracidae (Crustacea, Decapoda, Brachyura): Integrative analyses based on morphological and molecular data.

    Science.gov (United States)

    Assugeni, Camila de O; Magalhães, Tatiana; Bolaños, Juan A; Tudge, Christopher C; Mantelatto, Fernando L; Zara, Fernando J

    2017-12-01

    Recent studies based on morphological and molecular data provide a new perspective concerning taxonomic aspects of the brachyuran family Mithracidae. These studies proposed a series of nominal changes and indicated that the family is actually represented by a different number and representatives of genera than previously thought. Here, we provide a comparative description of the ultrastructure of spermatozoa and spermatophores of some species of Mithracidae in a phylogenetic context. The ultrastructure of the spermatozoa and spermatophore was observed by scanning and transmission electron microscopy. The most informative morphological characters analysed were thickness of the operculum, shape of the perforatorial chamber and shape and thickness of the inner acrosomal zone. As a framework, we used a topology based on a phylogenetic analysis using mitochondrial data obtained here and from previous studies. Our results indicate that closely related species share a series of morphological characteristics of the spermatozoa. A thick operculum, for example, is a feature observed in species of the genera Amphithrax, Teleophrys, and Omalacantha in contrast to the slender operculum observed in Mithraculus and Mithrax. Amphithrax and Teleophrys have a rhomboid perforatorial chamber, while Mithraculus, Mithrax, and Omalacantha show a wider, deltoid morphology. Furthermore, our results are in agreement with recently proposed taxonomic changes including the separation of the genera Mithrax (previously Damithrax), Amphithrax (previously Mithrax) and Mithraculus, and the synonymy of Mithrax caribbaeus with Mithrax hispidus. Overall, the spermiotaxonomy of these species of Mithracidae represent a novel set of data that corroborates the most recent taxonomic revision of the family and can be used in future taxonomic and phylogenetic studies within this family. © 2017 Wiley Periodicals, Inc.

  17. Notes on the Localities, Habitats, Biology, colour and vernacular names of new Guinea Freshwater Crabs (Crustacea Decapoda, Sundathelphusidae)

    NARCIS (Netherlands)

    Holthuis, L.B.

    1974-01-01

    From October 1954 to May 1955 three staff members of the Rijksmuseum van Natuurlijke Historie (Dr. L. D. Brongersma, Dr. M. Boeseman and myself) visited Netherlands New Guinea (at present officially named West Irian, and part of Indonesia) with the object to make zoological collections there and to

  18. Achalasia and Respiratory Symptoms: Effect of Laparoscopic Heller Myotomy.

    Science.gov (United States)

    Andolfi, Ciro; Kavitt, Robert T; Herbella, Fernando A M; Patti, Marco G

    2016-09-01

    Dysphagia and regurgitation are considered typical symptoms of achalasia. However, there is mounting evidence that some achalasia patients may also experience respiratory symptoms such as cough, wheezing, and hoarseness. The aims of this study were to determine: (1) what percentage of achalasia patients experience respiratory symptoms and (2) the effect of a laparoscopic Heller myotomy and Dor fundoplication on the typical and respiratory symptoms of achalasia. Between May 2008 and December 2015, 165 patients with achalasia were referred for treatment to the Center for Esophageal Diseases of the University of Chicago. Patients had preoperatively a barium swallow, endoscopy, and esophageal manometry. All patients underwent a Heller myotomy and Dor fundoplication. Based on the presence of respiratory symptoms, patients were divided into two groups: group A, 98 patients (59%) without respiratory symptoms and group B, 67 patients (41%) with respiratory symptoms. The preoperative Eckardt score was similar in the two groups (6.5 ± 2.1 versus 6.4 ± 2.0). The mean esophageal diameter was 27.7 ± 10.8 mm in group A and 42.6 ± 20.1 mm in group B (P myotomy that extended for 5 cm on the esophagus and 2.5 cm onto the gastric wall. At a median postoperative follow-up of 17 months, the Eckardt score improved significantly and similarly in the two groups (0.3 ± 0.8 versus 0.3 ± 1.0). Respiratory symptoms improved or resolved in 62 patients (92.5%). The results of this study showed that: (1) respiratory symptoms were present in 41% of patients; (2) patients with respiratory symptoms had a more dilated esophagus; and (3) surgical treatment resolved or improved respiratory symptoms in 92.5% of patients. This study underlines the importance of investigating the presence of respiratory symptoms along with the more common symptoms of achalasia and of early treatment before lung damage occurs.

  19. Defining the learning curve of laparoendoscopic single-site Heller myotomy.

    Science.gov (United States)

    Ross, Sharona B; Luberice, Kenneth; Kurian, Tony J; Paul, Harold; Rosemurgy, Alexander S

    2013-08-01

    Initial outcomes suggest laparoendoscopic single-site (LESS) Heller myotomy with anterior fundoplication provides safe, efficacious, and cosmetically superior outcomes relative to conventional laparoscopy. This study was undertaken to define the learning curve of LESS Heller myotomy with anterior fundoplication. One hundred patients underwent LESS Heller myotomy with anterior fundoplication. Symptom frequency and severity were scored using a Likert scale (0 = never/not bothersome to 10 = always/very bothersome). Symptom resolution, additional trocars, and complications were compared among patient quartiles. Median data are presented. Preoperative frequency/severity scores were: dysphagia = 10/8 and regurgitation = 8/7. Additional trocars were placed in 12 patients (10%), of whom all were in the first two quartiles. Esophagotomy/gastrotomy occurred in three patients. Postoperative complications occurred in 9 per cent. No conversions to "open" operations occurred. Length of stay was 1 day. Postoperative frequency/severity scores were: dysphagia = 2/0 and regurgitation = 0/0; scores were less than before myotomy (P Heller myotomy with anterior fundoplication well palliates symptoms of achalasia with no apparent scar. Placement of additional trocars only occurred early in the experience. For surgeons proficient with the conventional laparoscopic approach, the learning curve of LESS Heller myotomy with anterior fundoplication is short and safe, because proficiency is quickly attained.

  20. Laparoscopic Heller Myotomy and Fundoplication: What Is the Evidence?

    Science.gov (United States)

    Rebecchi, Fabrizio; Allaix, Marco E; Schlottmann, Francisco; Patti, Marco G; Morino, Mario

    2018-04-01

    There is no agreement about the best type of fundoplication to add in patients undergoing laparoscopic Heller myotomy (LHM) for achalasia to reduce the risk of postoperative gastroesophageal reflux. This article reviews the current evidence about the outcomes in achalasia patients undergoing LHM with a partial anterior, a partial posterior, or a total fundoplication. We performed a review of the literature in PubMed/Medline electronic databases, which was evaluated according to the GRADE system. The results of the published randomized controlled trials show with a high level of evidence that the addition of a fundoplication reduces the risk of postoperative abnormal reflux, without impairing the food emptying of the esophagus. LHM with partial fundoplication is considered in most centers worldwide the standard of care for the treatment of patients with achalasia. The current evidence fails to show any significant difference between partial anterior and posterior fundoplication. In the absence of further large randomized controlled trial, the decision of performing an anterior or a posterior wrap is based on the surgeon's experience and preference. The addition of a partial fundoplication to LHM leads to a significantly lower rate of postoperative pathological reflux without impairing the esophageal emptying.

  1. Landpissebedden van de Ooijpolder: deel 2. Ecologie (Crustacea: Isopoda: Oniscidea)

    NARCIS (Netherlands)

    Wijnhoven, H.

    2001-01-01

    Terrestrial isopods of the Ooijpolder: part 2. ecology (Crustacea: Isopoda: Oniscidea) From 1991 up to 1998 the isopod fauna of 1464 squares of 100x100 m was sampled in the Ooijpolder. This area is situated along the river Waal, east of Nijmegen (the Netherlands), close to the German border. In part

  2. Cavernicolous And Terrestrial Decapod Crustacea From Northern Sarawak, Borneo

    NARCIS (Netherlands)

    Holthuis, L.B.

    1979-01-01

    During the 1977-1978 Royal Geographical Society Mulu (Sarawak) Expedition a number of Decapod Crustacea was obtained. Some were collected by Mr. Philip Chapman in the course of studies of the invertebrates of the limestone caves in the Gunong Mulu National Park, 4th Division of Sarawak, and the Niah

  3. Landpissebedden van de Ooijpolder: deel 1. verspreiding (Crustacea: Isopoda: Oniscidea)

    NARCIS (Netherlands)

    Wijnhoven, H.

    2000-01-01

    Terrestrial isopods of the Ooijpolder: part 1. distribution (Crustacea: Isopoda: Oniscidea) The distributions and habitats of woodlice were investigated in ‘the Ooijpolder’, also named ‘the Ooij’. The area of approximately 41 square kilometers is located along the river Waal, east of Nijmegen,

  4. Laparoscopic Heller myotomy with or without partial fundoplication: A matter of debate

    Science.gov (United States)

    Ramacciato, G; D’Angelo, FA; Aurello, P; Gaudio, M Del; Varotti, G; Mercantini, P; Bellagamba, R; Ercolani, G

    2005-01-01

    AIM: To present our experience of laparoscopic Heller stretching myotomy followed by His angle reconstruction as surgical approach to esophageal achalasia. METHODS: Thirty-two patients underwent laparoscopic Heller myotomy; an anterior partial fundoplication in 17, and angle of His reconstruction in 15 cases represented the antireflux procedure of choice. RESULTS: There were no morbidity and mortality recorded in both anterior funduplication and angle of His reconstruction groups. No differences were detected in terms of recurrent dysphagia, p.o. reflux or medical therapy. CONCLUSION: To reduce the incidence of recurrent achalasia after laparoscopic Heller myotomy, we believe that His’ angle reconstruction is a safe and effective alternative to the anterior fundoplication. PMID:15770738

  5. The Impact of Heller Myotomy on Integrated Relaxation Pressure in Esophageal Achalasia.

    Science.gov (United States)

    Salvador, Renato; Savarino, Edoardo; Pesenti, Elisa; Spadotto, Lorenzo; Capovilla, Giovanni; Cavallin, Francesco; Galeazzi, Francesca; Nicoletti, Loredana; Merigliano, Stefano; Costantini, Mario

    2016-01-01

    A new high-resolution manometry (HRM) parameter, the integrated relaxation pressure (IRP), has been proposed for the assessment of esophageal-gastric junction (EGJ) relaxation. Our aim was to assess the effect of Heller myotomy on IRP in achalasia patients. We prospectively collected data on achalasia patients who underwent HRM between 2009-2014. Barium swallow was used to assess esophageal diameter and shape. Manometric diagnoses were performed by using the Chicago Classification v3. All patients with a confirmed diagnosis of achalasia were treated surgically with Heller Myotomy One hundred thirty-nine consecutive achalasia patients (M:F = 72:67) represented the study population. All the patients had 100% simultaneous waves but 11 had an IRP achalasia, and how it changes after surgical treatment. An increased preoperative IRP correlated directly with a more severe dysphagia. The IRP was restored to normal by Heller myotomy.

  6. The role of laparoscopic Heller myotomy in the treatment of achalasia.

    Science.gov (United States)

    Zonca, P; Cambal, M; Labas, P; Hrbaty, B; Jacobi, C A

    2014-01-01

    To evaluate the results of laparoscopic Heller myotomy in our group of patients. A retrospective clinical trial was carried out to evaluate the indication, technique and controversies of laparoscopic Heller myotomy in the achalasia treatment. The following symptoms were evaluated prior and after Heller myotomy: dysphagia, heartburn, nausea/vomiting after meal and asthma/coughing. The patients were evaluated by the use of Likert score. Statistical analysis was performed by using Student t test. The intra-operative (operation time, intraoperative complications, blood loss, conversion rate), and peri-operative parameters (morbidity, mortality, hospital stay) were evaluated as well. The patients who underwent laparoscopic Heller myotomy were included in the trial. All patients were perioperatively managed by a multidisciplinary team. The evaluation of fourteen patients was performed (average age: 53.2 yrs., eleven men, two women, BMI 23.6 kg/m(2)). The patients were indicated for surgery in all of the stages (I-III). Previous semiconservative therapeutic modalities were performed in thirteen patients. The standard laparoscopic technique for Heller myotomy with semifundoplication was applied. All the observed symptoms were statistically improved after the surgery (p=0.05). The average operating time was 89 minutes. Intraoperative blood loss was below 20 ml. There was no conversion to open surgery. An average hospital stay was 4.3 days. Morbidity was 14.3 % and mortality 0 %. In one patient esophageal mucosa perforation was intra-operatively identified and sutured. Post-operative course in this patient was without any complications. The laparoscopic Heller myotomy has become the "gold standard" procedure for achalasia. It is an excellent method allowing precise operation technique with good visualization of the esophagogastric junction. The operation with this approach is safe, efficient, and with excellent reproducible operative results. The correct and early indication

  7. Robotic heller myotomy and Dor fundoplication for achalasia in a woman with morbid obesity.

    Science.gov (United States)

    Bedirli, Abdulkadir; Dogan, Ibrahim; Kozan, Ramazan

    2012-12-01

    Achalasia is a relatively rare condition with a prevalence estimated at less than 0.001 %. Laparoscopic or robotic Heller myotomy is an effective surgical treatment for achalasia. We present the first published case of a morbidly obese achalasia patient treated with robotic Heller myotomy and Dor fundoplication. The operative time was 175 min, with an estimated blood loss of 110 ml. The patient had a normal bowel transit on postoperative day 2, and he was discharged on postoperative day 4 on a liquid diet. A follow-up at 2 months showed significant resolved symptoms of achalasia.

  8. Revisional Surgery after Heller Myotomy for Treatment of Achalasia: A Comparative Analysis Focusing on Operative Approach

    OpenAIRE

    Gouda, Biswanath P.; Nelson, Thomas; Bhoyrul, Sunil

    2012-01-01

    Surgical myotomy is the gold standard in therapy for achalasia, but treatment failures occur and require revisional surgery. A MEDLINE search of peer-reviewed articles published in English from 1970 to December 2008 was performed using the following terms: esophageal achalasia, Heller myotomy, and revisional surgery. Thirty-three articles satisfied our inclusion criteria. A total of 12,727 patients, with mean age of 43.3 years (males 46% and females 50%), underwent Heller myotomy (open 94.8% ...

  9. Plant feeding promotes diversification in the Crustacea.

    Science.gov (United States)

    Poore, Alistair G B; Ahyong, Shane T; Lowry, James K; Sotka, Erik E

    2017-08-15

    About half of the world's animal species are arthropods associated with plants, and the ability to consume plant material has been proposed to be an important trait associated with the spectacular diversification of terrestrial insects. We review the phylogenetic distribution of plant feeding in the Crustacea, the other major group of arthropods that commonly consume plants, to estimate how often plant feeding has arisen and to test whether this dietary transition is associated with higher species numbers in extant clades. We present evidence that at least 31 lineages of marine, freshwater, and terrestrial crustaceans (including 64 families and 185 genera) have independently overcome the challenges of consuming plant material. These plant-feeding clades are, on average, 21-fold more speciose than their sister taxa, indicating that a shift in diet is associated with increased net rates of diversification. In contrast to herbivorous insects, most crustaceans have very broad diets, and the increased richness of taxa that include plants in their diet likely results from access to a novel resource base rather than host-associated divergence.

  10. [Józef Heller-one of organizers of Polish biochemistry in 1942-1973].

    Science.gov (United States)

    Zarebska, Zofia

    2011-01-01

    The article commemorates the activity of Józef Heller starting in 1921 with Jakub Parnas's group in Lvov which investigated the phosphorolysis of glycogen. The unknown events of His biography were disclosed, like military service in the Piłsudski's Legions at the rebirth of the Polish State and, subsequently, during the Nazi occupation of Poland--participation in the clandestine teaching of medical students. In the post-war times Józef Heller undertook teaching of medical students in Wrocław and next in Warsaw. In 1954 He begun to organize the Institute of Biochemistry and Biophysics of the Polish Academy of Sciences--it now continues its activity. Professor Heller initiated the publication in Poland of three major biochemical journals, including Postepy Biochemii (1954). Thanks to His leadership the first Polish Medical Dictionary was published (1981). The article summarizes the pursuit of Józef Heller in various branches of academic life, which were and still are appreciated by subsequent generations of Polish biochemists.

  11. Dissatisfaction after laparoscopic Heller myotomy: The truth is easy to swallow.

    Science.gov (United States)

    Rosemurgy, Alexander; Downs, Darrell; Jadick, Giavanna; Swaid, Forat; Luberice, Kenneth; Ryan, Carrie; Ross, Sharona

    2017-06-01

    Although laparoscopic Heller myotomy has been shown to well palliate symptoms of achalasia, we have observed a small subset of patients who are "Dissatisfied". This study was undertaken to identify the causes of their dissatisfaction. Patients undergoing laparoscopic Heller myotomy from 1992 to 2015 were prospectively followed. Using a Likert scale, patients rated their symptom frequency/severity before and after the procedure. Patients graded their experience from "Very Satisfying" to "Very Unsatisfying." 647 patients underwent laparoscopic Heller myotomy. Fifty (8%) patients, median age 57 years and BMI 24 kg/m 2 reported dissatisfaction at follow-up subsequent to myotomy. "Dissatisfied" patients were more likely to have undergone prior abdominal operations (p = 0.01) or previous myotomies (p = 0.02). "Dissatisfied" patients had a greater incidence of diverticulectomy (p = 0.03) and had longer postoperative LOS (p = 0.01). Symptom frequency/severity persisted after myotomy for dissatisfied patients (p > 0.05). Dissatisfaction after laparoscopic Heller myotomy is directly related to persistent/recurrent symptoms. Previous abdominal operations/myotomies, diverticulectomies, and longer LOS are predictors of dissatisfaction. With this understanding, we can identify patients who might be more prone to dissatisfaction. Copyright © 2017 Elsevier Inc. All rights reserved.

  12. After laparoscopic Heller myotomy, do emergency department visits or readmissions predict poor long-term outcomes?

    Science.gov (United States)

    Ross, Sharona; Villadolid, Desiree; Al-Saadi, Sam; Boyle, Robert; Cowgill, Sarah M; Rosemurgy, Alexander

    2008-12-01

    Laparoscopic Heller myotomy is a first-line treatment for achalasia. To improve outcomes after myotomy and to determine if poor early results predict later outcomes, emergency department (ED) visits and readmissions within 60 days following laparoscopic Heller myotomy were studied. Since 1992, 352 patients have undergone laparoscopic Heller myotomy and are followed through a prospectively maintained registry. Causes of ED visits and readmissions within 60 days after myotomy were determined. Patients scored their symptoms of achalasia before myotomy and at last follow-up; scores were compared to determine if the reasons leading to ED visits and/or readmissions impacted long-term outcome after myotomy. Fourteen (4%) patients had ED visits, and 18 (5%) patients had readmissions within 60 days following myotomy. Sixty-four percent of ED visits were for dysphagia/vomiting and 36% were for abdominal/chest pain, while 37% of readmissions were for dysphagia/vomiting. Pneumonia was complicated by empyema in four patients, all without leaks; two patients expired. Despite ED visits/readmissions, achalasia symptom (e.g., dysphagia, regurgitation, choking, heartburn, and chest pain) frequency and severity scores improved after myotomy (p Heller myotomy. ED visits were generally due to complaints related to achalasia or edema after myotomy, while readmissions were generally related to complications of operative intervention or chronic ill health. Despite ED visits or readmissions early after myotomy, symptoms of achalasia are well palliated by myotomy long-term.

  13. Laparoscopic Heller myotomy and fundoplication in patients with Chagas' disease achalasia and massively dilated esophagus.

    Science.gov (United States)

    Pantanali, Carlos A R; Herbella, Fernando A M; Henry, Maria A; Mattos Farah, Jose Francisco; Patti, Marco G

    2013-01-01

    Laparoscopic Heller myotomy and fundoplication is considered today the treatment of choice for achalasia. The optimal treatment for end-stage achalasia with esophageal dilation is still controversial. This multicenter and retrospective study aims to evaluate the outcome of laparoscopic Heller myotomy in patients with a massively dilated esophagus. Eleven patients (mean age, 56 years; 6 men) with massively dilated esophagus (esophageal diameter greater than 10 cm) underwent a laparoscopic Heller myotomy and anterior fundoplication between 2000 and 2009 at three different institutions. Preoperative workup included upper endoscopy, esophagram, and esophageal manometry in all patients. Average follow-up was 31.5 months (range, 3 to 60 months). Two patients (18%) had severe dysphagia, four patients (36%) had mild and occasional dysphagia to solid food, and five patients (45%) were asymptomatic. All patients gained or kept body weight, except for the two patients with severe dysphagia. Of the two patients with severe dysphagia, one underwent esophageal dilatation and the other a laparoscopic esophagectomy. They are both doing well. Heller myotomy relieves dysphagia in the majority of patients even when the esophagus is massively dilated.

  14. Economic evaluation of the randomized European Achalasia trial comparing pneumodilation with Laparoscopic Heller myotomy

    NARCIS (Netherlands)

    Moonen, A.; Busch, O.; Costantini, M.; Finotti, E.; Tack, J.; Salvador, R.; Boeckxstaens, G.; Zaninotto, G.

    2017-01-01

    BackgroundA recent multicenter randomized trial in achalasia patients has shown that pneumatic dilation resulted in equivalent relief of symptoms compared to laparoscopic Heller myotomy. Additionally, the cost of each treatment should be also taken in consideration. Therefore, the aim of the present

  15. Fundoplication after heller myotomy: a retrospective comparison between nissen and dor.

    Science.gov (United States)

    Cuttitta, Antonello; Tancredi, Antonio; Andriulli, Angelo; De Santo, Ermelinda; Fontana, Andrea; Pellegrini, Fabio; Scaramuzzi, Roberto; Scaramuzzi, Gerardo

    2011-12-01

    A retrospective comparison between Nissen and Dor fundoplication after laparoscopic Heller myotomy for achalasia. From 1998 to 2004 a first group of 48 patients underwent Heller myotomy and Nissen fundoplication for idiopathic achalasia (H+N group). From 2004 to 2010 a second group of 40 patients underwent Heller myotomy followed by Dor fundoplication (H+D group). Some patients received a previous endoscopic treatment with pneumatic dilatation or endoscopic injection of botulinum toxin that provided them only a temporary clinical benefit. Changes in clinical and instrumental examinations from before to after surgery were evaluated in all patients. Clinical evaluation was carried out using a modified DeMeester symptom score system. Dor fundoplication treatment reduced both dysphagia and regurgitation severity scores significantly more than Nissen fundoplication (pHeller myotomy followed by Dor fundoplication is a safe and valuable treatment. The procedure showed a lower incidence of postoperative dysphagia versus Nissen fundoplication and a negligible incidence of postoperative GERD in a long-term postoperative follow-up.

  16. Laparoscopic Heller Myotomy and Dor Fundoplication for Esophageal Achalasia: Technique and Perioperative Management.

    Science.gov (United States)

    Andolfi, Ciro; Fisichella, P Marco

    2016-11-01

    Surgical correction of achalasia using laparoscopic Heller myotomy with Dor fundoplication is argued to be the gold standard treatment for patients with achalasia. The goal of this technical report is to illustrate our preferred approach to patients with achalasia and to provide the reader with a detailed description of our operative technique, its rationale, and our pre and postoperative management.

  17. Heller Myotomy for Achalasia: Quality of Life Comparison of Laparoscopic and Open Approaches

    Science.gov (United States)

    Katilius, Marius

    2001-01-01

    Background: Achalasia is a relatively rare disorder with a variety of treatment options. Although laparoscopic Heller myotomy has become the surgical treatment of choice, little data exist on the overall quality of life of patients undergoing this technique versus standard open approaches. Methods: We prospectively evaluated all patients surgically treated for achalasia by a single surgeon. Laparoscopic Heller myotomy consisted of a long (≥ 6 cm) esophageal cardiomyotomy extending at least 2 cm onto the gastric cardia, with a concomitant Dor fundoplication. Patients were evaluated preoperatively and postoperatively for symptoms and quality of life using the SF-36, a standardized, generic quality of life instrument. Results: A total of 23 patients were surgically treated: 15 patients had a planned laparoscopic procedure, with 3 conversions; 8 had planned open procedures. Dysphagia resolved in 20 of 21 patients, with 1 patient in the laparoscopic group requiring reoperation due to an inadequate gastric myotomy. Compared with preoperative scores, a statistically significant improvement occurred in the general health domain of the SF-36 (70 to 82, P = 0.04). Compared with that in patients undergoing open surgery, the laparoscopic group had better scores in the domains of physical functioning and bodily pain. Conclusions: Laparoscopic Heller myotomy has comparable success to open Heller myotomy, and causes less early detriment to quality of life. This should be the primary treatment in all fit surgical patients with achalasia. PMID:11548827

  18. Laparoscopic Heller myotomy for achalasia: changing trend toward "true" day-case procedure.

    Science.gov (United States)

    Agrawal, Sanjay; Super, Paul

    2008-12-01

    Laparoscopic Heller myotomy is the most effective therapy for achalasia. All case series have reported a minimum length of stay of more than 1 day. "True" day-case laparoscopic Heller myotomy has not been reported, so far. The aim of this study was to review our results with laparoscopic Heller myotomy with respect to the length of stay following the procedure. All patients undergoing laparoscopic Heller myotomy between August 2000 and July 2007 under the care of one surgeon were included in the study. This was performed by incising 6 cm of distal esophageal musculature, extending to 2 cm below the gastroesophageal junction. The myotomy was covered by an anterior fundoplication. All patients were reviewed in the clinic at a median of 6 weeks after surgery and, thereafter, if necessary. Over the 7-year period, 24 consecutive patients with achalasia were treated in this manner. There were 13 women and 11 men, with an age range of 12-73 years. Intraoperative complications included mucosal perforation in 2 patients (sutured immediately) with no postoperative complications or conversion to open surgery. There were no deaths. The average length of stay was 1.9 days (range, 0-4). The last 2 patients were discharged on the same day, and the 5 previous to this were discharged within 23 hours of surgery. There were no adverse outcomes related to early discharge, and there were no readmissions. All patients reported good to excellent results with a relief of dysphagia on follow-up. Three patients (12%) developed recurrent dysphagia after an initial improvement, requiring dilatation only several months later. Based on our own experience, we believe that laparoscopic Heller myotomy with anterior partial fundoplication is safe and achieves a good outcome in the treatment of achalasia. It is well tolerated and can be considered a true day-case procedure.

  19. Laparoscopic heller myotomy for achalasia cardia-initial experience in a teaching institute.

    Science.gov (United States)

    Kaman, Lileswar; Iqbal, Javid; Kochhar, Rakesh; Sinha, Saroj

    2013-10-01

    Laparoscopic Heller cardiomyotomy and Dor fundoplication is the surgical procedure of choice for esophageal achalasia. The aim of our study was to investigate the clinical outcome and safety of laparoscopic Heller-Dor procedure performed by using Hook electrocautery and as a teaching module for advanced laparoscopic surgery. Between January 2005 and December 2010, 25 consecutive patients with achalasia underwent laparoscopic Heller-Dor operation by a single surgeon. All the patients received upper gastrointestinal series (barium swallow), esophagogastroscopy, and esophageal manometry to exclude esophageal carcinoma and to confirm the diagnosis. All the patients were operated by laparoscopic modified Heller myotomy with Dor fundoplication by using hook electrocautery. Among 25 operated patients, 14 were male and 11 were female with a median age of 43 years (range 18-72 years). The mean operative time was 93.3 min (range 50-50 min), the mean operative blood loss was 90 ml (range 40-200 ml), the median time to oral feeding was 2 days (2-4 days), and the median hospital stay was 4 days (4-7 days). There was no conversion to open surgery. Intraoperative mucosal perforation was encountered in three patients and was repaired in all of them by laparoscopic suture. All the patients had an uneventful recovery without postoperative complication and had excellent clinical response (96 %) during follow-up. Laparoscopic Heller-Dor operation using hook electrocautery is safe, inexpensive, and effective treatment for achalasia which is useful for teaching and training surgical residents in advanced laparoscopic surgery.

  20. Laparoscopic Heller myotomy can be used as primary therapy for esophageal achalasia regardless of age.

    Science.gov (United States)

    Salvador, Renato; Costantini, Mario; Cavallin, Francesco; Zanatta, Lisa; Finotti, Elena; Longo, Cristina; Nicoletti, Loredana; Capovilla, Giovanni; Bardini, Romeo; Zaninotto, Giovanni

    2014-01-01

    Laparoscopic Heller-Dor surgery is the current treatment of choice for patients with esophageal achalasia, but elderly patients are generally referred for less invasive treatments (pneumatic dilations or botulinum toxin injections). To assess the effect of age on the surgical outcome of patients receiving laparoscopic Heller-Dor as primary treatment. Demographic and clinical findings were prospectively collected on patients undergoing laparoscopic Heller-Dor from 1992 to 2012. Patients were classified in three age brackets: group A (≤45 years), group B (45-70), and group C (≥70). Treatment was defined as a failure if the postoperative symptom score was >10th percentile of the preoperative score (i.e., >8). We consecutively performed the Heller-Dor in 571 achalasia patients, 305 (53.4 %) in group A, 226 (39.6 %) in group B, and 40 (7 %) in group C. The mortality was nil; the conversion and morbidity rates were both 1.1 %. Group C patients had higher preoperative symptom scores (p = 0.02), while the symptom duration was similar in all three groups. Mucosal tears occurred in 17 patients (3 %): 6 (2 %) in group A, 8 (3.5 %) in group B, and 3 (7.5 %) in group C (p = 0.09). The postoperative hospital stay was slightly longer for group C (p = 0.06). The treatment failure rate was quite similar: 31 failures in group A (10.1 %), 19 in group B (8.4 %), and 3 in group C (7.5 %; p = 0.80). These failures were seen more in manometric pattern III (22.2 %, p = 0.002). Laparoscopic Heller-Dor can be used as the first therapeutic approach to achalasia even in elderly patients with an acceptable surgical risk.

  1. Laparoscopic Heller myotomy provides durable relief from achalasia and salvages failures after botox or dilation.

    Science.gov (United States)

    Rosemurgy, Alexander; Villadolid, Desiree; Thometz, Donald; Kalipersad, Candice; Rakita, Steven; Albrink, Michael; Johnson, Milton; Boyce, Worth

    2005-05-01

    To report outcome after laparoscopic Heller myotomy in a large number of patients. Laparoscopic Heller myotomy has been undertaken for over a decade, but most studies involve small numbers of patients with limited follow-up. Since 1992, 262 patients have undergone laparoscopic Heller myotomy and been prospectively followed. Concomitant fundoplication was undertaken for a patulous hiatus or large hiatal hernia or to buttress the repair of an esophagotomy until recently when it became routinely applied. With mean follow-up at 32 months, symptoms were scored by patients on a Likert scale (frequency: 0 = Never to 10 = Every time I eat/always; severity: 0 = Not bothersome to 10 = Very bothersome). Before myotomy, 79% received Botox or bag dilation: 52% had Botox, 59% underwent dilation, and 36% had both. Inadvertent esophagotomy occurred in 5%. Concomitant diverticulectomy was undertaken in 4%, and fundoplication was undertaken in 30%. Complications were infrequent. Median length of stay was 1 day. After myotomy, the frequency and severity of symptoms of achalasia and reflux significantly decreased. Eighty-eight percent of patients felt their symptoms were greatly improved or resolved, and 90% felt their outcome was satisfying or better. Ninety-three percent felt they would undergo myotomy again, if necessary. Laparoscopic Heller myotomy can safely and durably relieve symptoms of dysphagia while also reducing symptoms of reflux. Length of stay is short and patient satisfaction is very high with extended follow-up. Laparoscopic Heller myotomy is strongly encouraged for patients with symptomatic achalasia and is efficacious even after failures of dilation and/or Botox therapy.

  2. Laparoscopic Heller Myotomy Provides Durable Relief From Achalasia and Salvages Failures After Botox or Dilation

    Science.gov (United States)

    Rosemurgy, Alexander; Villadolid, Desiree; Thometz, Donald; Kalipersad, Candice; Rakita, Steven; Albrink, Michael; Johnson, Milton; Boyce, Worth

    2005-01-01

    Objective: To report outcome after laparoscopic Heller myotomy in a large number of patients. Summary Background Data: Laparoscopic Heller myotomy has been undertaken for over a decade, but most studies involve small numbers of patients with limited follow-up. Methods: Since 1992, 262 patients have undergone laparoscopic Heller myotomy and been prospectively followed. Concomitant fundoplication was undertaken for a patulous hiatus or large hiatal hernia or to buttress the repair of an esophagotomy until recently when it became routinely applied. With mean follow-up at 32months, symptoms were scored by patients on a Likert scale (frequency: 0 = Never to 10 = Every time I eat/always; severity: 0 = Not bothersome to 10 = Very bothersome). Results: Before myotomy, 79% received Botox or bag dilation: 52% had Botox, 59% underwent dilation, and 36% had both. Inadvertent esophagotomy occurred in 5%. Concomitant diverticulectomy was undertaken in 4%, and fundoplication was undertaken in 30%. Complications were infrequent. Median length of stay was 1 day. After myotomy, the frequency and severity of symptoms of achalasia and reflux significantly decreased. Eighty-eight percent of patients felt their symptoms were greatly improved or resolved, and 90% felt their outcome was satisfying or better. Ninety-three percent felt they would undergo myotomy again, if necessary. Conclusions: Laparoscopic Heller myotomy can safely and durably relieve symptoms of dysphagia while also reducing symptoms of reflux. Length of stay is short and patient satisfaction is very high with extended follow-up. Laparoscopic Heller myotomy is strongly encouraged for patients with symptomatic achalasia and is efficacious even after failures of dilation and/or Botox therapy. PMID:15849508

  3. Results after laparoscopic Heller-Dor operation for esophageal achalasia in 100 consecutive patients.

    Science.gov (United States)

    Tsuboi, Kazuto; Omura, Nobuo; Yano, Fumiaki; Kashiwagi, Hideyuki; Yanaga, Katsuhiko

    2009-01-01

    The laparoscopic Heller-Dor operation has been the procedure of choice for the treatment of achalasia. However, because the incidence of achalasia is low, reports on the outcome of surgical treatment for achalasia are limited. In this study, the therapeutic results after laparoscopic Heller-Dor operation for achalasia at a single university hospital were evaluated. Between August 1994 and July 2006, 100 consecutive patients underwent laparoscopic Heller-Dor operation. The therapeutic results after laparoscopic Heller-Dor operation were assessed based on complications, operation time, blood loss, postoperative hospital stay, and the standardized questionnaire for satisfaction by telephone or outpatient clinic interview. With respect to perioperative complications, lower esophageal mucosal perforation occurred in 14 patients, but all of them could be suture-obliterated laparoscopically. One patient was converted to laparotomy because of uncontrolled bleeding from the short gastric artery. The mean operative time was 169 minutes, and the mean perioperative blood loss was 22 mL. The median postoperative hospital stay was 7 days. Reflux esophagitis, which was seen in five patients, was treated successfully with a proton pump inhibitor. According to the standardized questionnaire for satisfaction, 77 patients rated their recovery as 'excellent', 17 as 'good', 4 as 'fair', and 2 as 'poor'; thus, the overall success rate was 94%. There were no significant differences in surgical outcomes by morphologic type and severity of esophageal dilatation; however, the success rate deteriorated significantly with progression of the morphologic type. Laparoscopic Heller-Dor operation is a safe and effective surgical treatment for achalasia.

  4. Intersexuality in Crustacea: an environmental issue?

    Science.gov (United States)

    Ford, Alex T

    2012-02-01

    This paper aims to give a historical overview of current understanding about intersexuality in crustaceans, assesses gaps in our knowledge and asks whether it should be an environmental concern. The oldest known cases of intersexuality come from 70 million year old fossil crabs whilst the oldest published case of intersex crustacean stems from a 1730 Royal Society report of a gynandromorph lobster. Many crustacean species are sequential hermaphroditic or simultaneous hermaphrodites. Consequently, there has been confusion as to whether accounts of intersex in the literature are correct. Intersexuality is fairly common throughout the Crustacea and it has been suggested that intersex may arise through different mechanisms. For example, sexual gynandromorphism may arise through disruption in early embryonic development whereas intersexuality may also arise through perturbations of androgenic gland hormone and sexual differentiation in later development. The causes of intersex are multifaceted and can occur through a number of mechanisms including parasitism, environmental sex determination, genetic abnormalities and increasingly pollution is being implicated. Despite many studies on the effects of endocrine disrupters on crustaceans, very few have focussed on wild populations or male related endpoints; rather many laboratory studies have been attempting to assess biomarkers of feminisation. This is surprising as many of the seminal papers on endocrine disruption focussed on effects found in the wild and male specimens. This paper argues that we might have been addressing the right questions (i.e. pollution induced intersex), but in the wrong way (feminisation); and therefore gives recommendations for future directions for research. Biomarker development has been hampered by paucity of genomic and endocrine knowledge of many crustacean model species; however this is rapidly changing with the advent of cheaper affordable genomic techniques and high throughput sequencing

  5. Limited Hiatal Dissection Without Fundoplication Results in Comparable Symptomatic Outcomes to Laparoscopic Heller Myotomy with Anterior Fundoplication.

    Science.gov (United States)

    DeHaan, Reece K; Frelich, Matthew J; Gould, Jon C

    2016-07-01

    Previous randomized controlled trials have demonstrated that partial fundoplication following Heller myotomy results in less pathologic acid exposure to the esophagus when compared to myotomy without fundoplication. Recent studies have questioned the necessity of a fundoplication, especially when a limited hiatal dissection (LHD) is performed and the angle of His is preserved. This is a retrospective review of prospectively maintained data. All patients underwent primary Heller myotomy for achalasia over a 30-month period. In select patients, an LHD was performed anteriorly. Symptomatic outcomes were assessed up to 2 years postoperation using the Achalasia Severity Questionnaire (ASQ), Gastrointestinal Quality of Life Index (GIQLI), and Gastroesophageal Reflux Disease-Health-Related Quality of Life (GERD-HRQL). A total of 31 patients underwent Heller myotomy during the study interval. The majority of patients underwent Heller myotomy with full hiatal dissection (FHD) (21, 68%). Intraoperative mucosal perforations occurred in 3 (14%) patients undergoing FHD. Patient demographics, surgery details, and baseline symptomatic outcomes did not differ significantly preoperatively. At greater than 1 year postoperation, there was no significant difference between the groups for ASQ, GERD-HRQL, and GIGLI (P = .76, .78, and .33, respectively). Heller myotomy with LHD and no fundoplication and Heller myotomy with FHD and partial fundoplication result in similar GERD-related quality of life outcomes. Further studies (including pH studies) are necessary to determine if fundoplication is a necessary step in selected patients in whom an LHD is possible.

  6. Long-term outcome of peroral endoscopic myotomy for esophageal achalasia in patients with previous Heller myotomy.

    Science.gov (United States)

    Kristensen, Helle Ø; Kirkegård, Jakob; Kjær, Daniel Willy; Mortensen, Frank Viborg; Kunda, Rastislav; Bjerregaard, Niels Christian

    2017-06-01

    Peroral endoscopic myotomy (POEM) is an emerging procedure in the treatment of esophageal achalasia, a primary motility disorder. However, the long-term outcome of POEM in patients, who have previously undergone a Heller myotomy, is unknown. Using a local database, we identified patients with esophageal achalasia, who underwent POEM. We compared patients with a previous Heller myotomy to those, who had received none or only non-surgical therapy prior to the POEM procedure. We conducted follow-up examinations at 3, 12, and 24 months following the procedure. We included 66 consecutive patients undergoing POEM for achalasia, of which 14 (21.2 %) had undergone a prior Heller myotomy. In both groups, the preoperative Eckardt score was 7. Postoperatively, the non-Heller group experienced a more pronounced symptom relief at both 3-, 12-, and 24-month follow-up compared with the Heller group, and there was a tendency for the effect of POEM to reduce over time. We suggest that there is a correlation between preoperative measurements of gastroesophageal sphincter pressures and the chance of a successful POEM. POEM has a place in the treatment of esophageal achalasia in patients with a prior Heller myotomy and persistent symptoms as it is a safe procedure with acceptable long-term results.

  7. Redo Heller Myotomy for Achalasia in a Patient with Down Syndrome: a Case Report.

    Science.gov (United States)

    Sosa-Stanley, Jessica; Vandendool, KellyAnn; Kiev, Jonathan

    2015-01-01

    Up to 77% of Down syndrome (DS) patients have associated structural or functional gastrointestinal abnormalities. Functional disturbances, such as processes affecting the enteric nervous system, can often affect the outcome of corrective surgical procedures. Recently, an association between DS and achalasia has been reported. In this report we present a 28-year-old male patient with a history of Down syndrome and achalasia, who presented with recurrent dysphagia, gastroesophageal reflux, and recurrent aspirations. The patient had previously undergone a laparoscopic Heller myotomy with Dor fundoplication. Unfortunately, despite this surgery, he continued to require multiple esophageal dilations, and intraesophageal administration of Botox therapy. Additionally, there were numerous subsequent hospital admissions for recurrent aspiration pneumonia. Evaluation revealed an incomplete myotomy and a revision long Heller myotomy was successfully performed intraabdominally and he is now symptom and aspiration free.

  8. Peroral Endoscopic Myotomy Versus Heller Myotomy for Achalasia: Pros and Cons.

    Science.gov (United States)

    Tefas, Cristian; Ababneh, Rami; Tanţău, Marcel

    2018-01-01

    Achalasia is an esophageal motor disorder that has multiple endoscopic and surgical methods of treatment. However, there is no consensus on optimal therapy in patients suffering from this disorder. This review discusses two therapies with similar but technically different concepts, peroral endoscopic myotomy and Heller surgical myotomy. After a brief introduction to the basic problems of achalasia, technical considerations, intra and postprocedural complications are presented and the advantages and disadvantages of the two procedures are discussed, based on the relevant articles in the literature. Heller surgical myotomy and peroral endoscopic myotomy appear to be similar in performance with similar results in terms of gastroesophageal reflux rates. However, with experience being gained in the field of endoscopic myotomy, this procedure seems more advantageous, with similar success rates to those of the established surgical technique, but offering shorter operating times, shorter hospitalizations and, ultimately, lower costs. Celsius.

  9. Outcome of Achalasia Cardia Managed with Transabdominal Hellers Cardiomyotomy and Anterior Dor Patch

    International Nuclear Information System (INIS)

    Wyne, A.; Majeed, F. A.; Khan, M. I.; Rahim, K.

    2013-01-01

    Objectives: To evaluate relief of dysphagia and apprearance of reflux symptoms in patients of achalasia cardia treated with Trans abdominal cardiomyotomy and anterior Dor patch. Study Design: Quasi experimental study. Place and duration of study: Combined Military Hospital Quetta and Combined Military Hospital Rawalpindi from Jan 2006 to Jan 2012. Methodology: Twenty three cases were diagnosed to have achalasia cardia on barium swallow, upper GI endoscopy and CT scan chest in selective cases. They were treated with transabdominal modified Hellers cardiomyotomy and anterior Dor patch as an antireflux procedure. Relief of dysphagia and occurrence of reflux symptoms were evaluated clinically. Results: All (100%) operated patients had symptomatic relief of dysphagia over follow up of six months. No patient had post op reflux symptoms. Conclusion: Transabdominal Hellers cardiomyotomy with anterior Dor patch is a safe and effective surgical option for achalasia cardia. (author)

  10. Heller myotomy for achalasia. From the open to the laparoscopic approach.

    Science.gov (United States)

    Allaix, Marco E; Patti, Marco G

    2015-07-01

    The last three decades have witnessed a progressive evolution in the surgical treatment of esophageal achalasia, with a shift from open to a minimally invasive Heller myotomy. The laparoscopic approach is currently the standard of care with better short-term outcomes and similar long-term functional results when compared to open surgery. More recently, the laparoscopic single-site approach and the use of the robot have been proposed to further improve the surgical outcome in achalasia patients.

  11. The early efficacy of Heller myotomy in the treatment of Iranian patients with achalasia.

    Science.gov (United States)

    Abdi, Saeed; Forotan, Mojgan; Nikzamir, Abdolrahim; Zomorody, Saeedeh; Jahani-Sherafat, Somayeh

    2016-01-01

    The purpose of this study was to determine the efficacy of Heller myotomy for the treatment of achalasia in a referral center in Tehran, and investigate the clinical characteristics, manometric results and treatment responses among three achalasia subtypes in Iranian patients. Esophageal achalasia is an unusual swallowing disorder, characterized by high pressure in the lower esophageal sphincter (LES) on swallowing, failure relaxation of the LES and the absence of peristalsis in esophageal. In this cross sectional study, clinical symptom and esophageal manometry before and 2 months after treating with Heller myotomy in 20 patients with achalasia who were referred to Taleghani Hospital, Tehran, in 2013 were evaluated. Patients' demographic, clinical features and response to treatment were analyzed using SPSS software (version 20, Chicago, IL, USA). All the diagnostic criteria measured after the treatment were significantly different (PHeller myotomy is highly effective in relieving dysphasia in patients with achalasia. Also, type II achalasia is the most common subtype of achalasia with a better response to Heller myotomy compared to the other types.

  12. Laparoscopic Heller-Dor for primary esophageal achalasia: outcomes in 173 patients.

    Science.gov (United States)

    Rosati, Riccardo; Fumagalli Romario, Uberto; Ceolin, Martina; Massaron, Simonetta; Peracchia, Alberto

    2013-01-01

    Laparoscopic Heller myotomy combined with anterior (Dor) fundoplication is the most widely-used surgical procedure for treating esophageal achalasia in Europe From November 1992 through May 2010 we performed laparoscopic Heller-Dor on 173 patients Conversion to laparotomy was required in three cases (1.7%) at the beginning of the experience (for mucosal) perforation which was the most frequent intraoperative complication, managed laparoscopically with the increasing experience. Five (2.9%) cases had minor postoperative complications. Clinical results were satisfactory in 99.4% of cases. One patient (0.6%) had severe persistent dysphagia. Mean esophageal diameter decreased from 50 mm ± 12 (range 20- 90) to 25 mm ± 7 (range 15-80). Lower esophageal sphincter pressure decreased from 32 mmHg (median, range 10- 93) pre-operatively to 11 mmHg (median, range 5-21) at one year follow up and residual pressure from 12 mmHg (median, range 3-30) to 4 mmHg (median, range 1-8). Impedance and pH monitoring showed normal levels in 39/47 (83%) patients who agreed to testing. The good outcomes of this experience, in part due to careful adherence to technical aspects of the operation, confirm that the laparoscopic Heller-Dor is the gold standard surgical treatment for esophageal achalasia.

  13. Revisional surgery after heller myotomy for treatment of achalasia: a comparative analysis focusing on operative approach.

    Science.gov (United States)

    Gouda, Biswanath P; Nelson, Thomas; Bhoyrul, Sunil

    2012-08-01

    Surgical myotomy is the gold standard in therapy for achalasia, but treatment failures occur and require revisional surgery. A MEDLINE search of peer-reviewed articles published in English from 1970 to December 2008 was performed using the following terms: esophageal achalasia, Heller myotomy, and revisional surgery. Thirty-three articles satisfied our inclusion criteria. A total of 12,727 patients, with mean age of 43.3 years (males 46% and females 50%), underwent Heller myotomy (open 94.8% and laparoscopic 5.2%). Revisional surgery was performed in 6.19%. Procedures performed included revision of the original myotomy or creation of a new myotomy with or without an antireflux procedure or esophagectomy. Reasons for reoperation were incomplete myotomy (51.8%), onset of reflux (34%), megaesophagus (16.2%), and esophageal carcinoma (3.04%). Systematic review of the literature for revisional surgery following Heller myotomy revealed a 6.19% rate of reoperation with a low mortality rate.

  14. Long-term results of Heller myotomy without an antireflux procedure in achalasic patients.

    Science.gov (United States)

    Cortesini, Camillo; Cianchi, Fabio; Pucciani, Filippo

    2002-01-01

    Both open and laparoscopic myotomies have been used in the treatment of achalasia. Postoperative gastro-oesophageal reflux is among the commonly reported side effects of myotomy. The addition of an antireflux procedure to the standard surgical approach has given rise to controversy. The objective of our study was to determine whether or not an antireflux procedure should be used in addition to Heller myotomy. Over the period from 1980 to 1990, 94 patients (mean age: 47.9 years) with achalasia underwent Heller myotomy calibrated by intraoperative oesophageal manometry without fundoplication. In 1999-2000, all patients filled in a clinical questionnaire: all underwent radiographic oesophageal imaging, oesophageal manometry, ambulatory 24-h oesophageal pH monitoring, and oesophagogastroduodenoscopy, when necessary. Ten healthy age-matched subjects were compared in the manometric and radiological studies. Myotomy improved the clinical profiles and instrumental data results in all patients. Gastro-oesophageal reflux was present in 10 patients (10.6%); none of these 10 subjects presented oesophagitis. Heller open myotomy yields good long-term results. Intraoperative manometric calibration reduces the side effects of myotomy, such as gastro-oesophageal reflux. The addition of fundoplication is not justified in all patients.

  15. Randomized controlled trial of laparoscopic Heller myotomy plus Dor fundoplication versus Nissen fundoplication for achalasia: long-term results.

    Science.gov (United States)

    Rebecchi, Fabrizio; Giaccone, Claudio; Farinella, Eleonora; Campaci, Roberto; Morino, Mario

    2008-12-01

    To compare in a prospective, randomized trial the long-term results of laparoscopic Heller myotomy plus Dor fundoplication versus laparoscopic Heller myotomy plus floppy-Nissen for achalasia. Anterior fundoplication is usually performed after Heller myotomy to control GER; however, the incidence of postoperative GER ranges between 10% and 30%. Total fundoplication may aid in reducing GER rates. From December 1993 to September 2002, 153 patients with achalasia underwent Heller laparoscopic myotomy plus antireflux fundoplication. Of these, 9 were excluded from the study. The remaining 144 patients were randomly assigned to 2 treatment groups: Heller laparoscopic myotomy plus anterior fundoplication (Dor procedure) or Heller laparoscopic myotomy plus total fundoplication (floppy-Nissen procedure). The primary end point was incidence of clinical and instrumental GER after a minimum of 60 months follow-up. The secondary end point was recurrence of dysphagia. Follow-up clinical assessments were performed at 1, 3, 12, and 60 months using a modified DeMeester Symptom Scoring System (MDSS). Esophageal manometry and 24-hour pH monitoring were performed at 3, 12, and 60 months postoperative. Of the 144 patients originally included in the study, 138 were available for long-term analysis: 71 (51%) underwent antireflux fundoplication plus a Dor procedure (H + D group) and 67 (49%) antireflux fundoplication plus a Nissen procedure (H + N group). No mortality was observed. The mean follow-up period was 125 months. No statistically significant differences in clinical (5.6% vs. 0%) or instrumental GER (2.8% vs. 0%) were found between the 2 groups; however, a statistically significant difference in dysphagia rates was noted (2.8% vs. 15%; P Heller myotomy.

  16. Population structure of the seabob shrimp Xiphopenaeus kroyeri (Heller, 1862 (Crustacea: Penaeoidea in the littoral of São Paulo, Brazil

    Directory of Open Access Journals (Sweden)

    Rodrigo H. Castro

    2005-03-01

    Full Text Available The population structure of the penaeidean shrimp Xyphopenaeus kroyeri was studied in Ubatuba Bay, Ubatuba, São Paulo, Brazil. The period and site of juvenile recruitment were monitored using a monthly sampling design with eight fixed areas (transects from September 1995 to August 1996. The population structure was assessed using size frequency distributions (based on carapace length for each month and sampling area. Females were significantly larger than males, suggesting a differential growth between sexes. The very low occurrence of large adults in the Bay can be related to offshore migration for reproduction. Recruitment occurred throughout the year, with a peak during the summer, when the highest recruitment rates were obtained along inshore transects. The present investigation revealed valuable information on the biology of the species mainly in the study region, which is considered a nursery ground for juveniles of X. kroyeri. The species showed an important variation from the typical life cycle that it is assumed to hold over its entire range and X. kroyeri should be classified as having a life cycle different from that proposed previously in the literature, i.e. the juveniles prefer inshore areas instead of estuaries. Some suggestions for the seabob fishery management are proposed as an alternative for minimising the impact during the harvest period and adjusting the protection schedule.

  17. Per-Oral Endoscopic Myotomy (POEM) After Previous Laparoscopic Heller Myotomy Is Feasible and Safe in a Porcine Model.

    Science.gov (United States)

    Miles, Luke F; Frelich, Matthew J; Gould, Jon C; Dua, Kulwinder S; Jensen, Eric S; Kastenmeier, Andrew S

    2015-10-01

    We sought to evaluate the feasibility, safety, and difficulty of performing the per-oral endoscopic myotomy (POEM) procedure in the setting of a prior Heller myotomy using a survival porcine model. Four pigs underwent laparoscopic Heller myotomy with Dor partial anterior fundoplication followed by the POEM performed 4 weeks later. Two additional pigs served as controls, undergoing only the POEM. All procedures were completed without complications. The revisional POEM was not significantly more difficult than POEM controls based on procedure time, POEM procedure components, or procedure difficulty scores. Revisional POEM had a longer mean operative time when compared with Heller myotomy (126.0 vs. 83.8 min; PHeller myotomy is safe and feasible in the porcine model and has potential as an option for patients suffering from recurrent or persistent symptoms after failed surgical myotomy.

  18. Trends of Heller myotomy hospitalizations for achalasia in the United States, 1993-2005: effect of surgery volume on perioperative outcomes.

    Science.gov (United States)

    Wang, Y Richard; Dempsey, Daniel T; Friedenberg, Frank K; Richter, Joel E

    2008-10-01

    Achalasia is a rare chronic disorder of esophageal motor function. Single-center reports suggest that there has been greater use of laparoscopic Heller myotomy for achalasia in the United States since its introduction in 1992. We aimed to study the trends of Heller myotomy and the relationship between surgery volume and perioperative outcomes. The Healthcare Cost and Utilization Project Nationwide Inpatient Sample (NIS) is a 20% stratified sample of all hospitalizations in the United States. It was used to study the macro-trends of Heller myotomy hospitalizations during 1993-2005. We also used the NIS 2003-2005 micro-data to study the perioperative outcomes of Heller myotomy hospitalizations, using other achalasia and laparoscopic cholecystectomy hospitalizations as control groups. The generalized linear model with repeated observations from the same unit was used to adjust for multiple hospitalizations from the same hospital. The national estimate of Heller myotomy hospitalizations increased from 728 to 2,255 during 1993-2005, while its mean length of stay decreased from 9.9 to 4.3 days. Of the 1,117 Heller myotomy hospitalizations in the NIS 2003-2005, 10 (0.9%) had the diagnosis of esophageal perforation at discharge. Length of stay was negatively correlated with a hospital's number of Heller myotomy per year (correlation coefficient -0.171, P Heller myotomy per year was negatively associated with length of stay (coefficient -0.215 to -0.119, both P Heller myotomy for achalasia was associated with greater use of surgery and shorter length of stay. A larger volume of Heller myotomy in a hospital was associated with better perioperative outcomes in terms of shorter length of stay and lower total charges.

  19. Laparoscopic reoperation with total fundoplication for failed Heller myotomy: is it a possible option? Personal experience and review of literature.

    Science.gov (United States)

    Rossetti, Gianluca; del Genio, Gianmattia; Maffettone, Vincenzo; Fei, Landino; Brusciano, Luigi; Limongelli, Paolo; Pizza, Francesco; Tolone, Salvatore; Di Martino, Maria; del Genio, Federica; del Genio, Alberto

    2009-01-01

    Laparoscopic Heller myotomy with antireflux procedure seems the procedure of choice in the treatment of patients with esophageal achalasia. Persistent or recurrent symptoms occur in 10% to 20% of patients. Few reports on reoperation after failed Heller myotomy have been published. No author has reported the realization of a total fundoplication in these patient groups. The aim of this study is to evaluate the efficacy of laparoscopic reoperation with the realization of a total fundoplication after failed Heller myotomy for esophageal achalasia. From 1992 to December 2007, 5 out of a series of 242 patients (2.1%), along with 2 patients operated elsewhere, underwent laparoscopic reintervention for failed Heller myotomy. Symptoms leading to reoperation included persistent dysphagia in 3 patients, recurrent dysphagia in another 3, and heartburn in 1 patient. Mean time from the first to the second operation was 49.7 months (range, 4-180 months). Always, the intervention was completed via a laparoscopic approach and a Nissen-Rossetti fundoplication was realized or left in place after a complete Heller myotomy. Mean operative time was 160 minutes (range, 60-245 minutes). Mean postoperative hospital stay was 3.1 +/- 1.5 days. No major morbidity or mortality occurred. At a mean follow-up of 16.1 months, reoperation must be considered successful in 5 out of 7 patients (71.4%). The dysphagia DeMeester score fell from 2.71 +/- 0.22 to 0.91 +/- 0.38 postoperatively. The regurgitation score changed from 2.45 +/- 0.34 to 0.68 +/- 0.23. Laparoscopic reoperation for failed Heller myotomy with the realization of a total fundoplication is safe and is associated with good long-term results if performed by an experienced surgeon in a center with a long tradition of esophageal surgery.

  20. Miotomía de Heller por vía laparoscópica: un procedimiento seguro

    OpenAIRE

    Borráez, Bernardo A.; Patti, Marco G.

    2014-01-01

    Introducción. La miotomía de Heller como tratamiento quirúrgico de elección para la acalasia, ofrece de buenos a excelentes resultados a corto y largo plazo, pero, incluso en manos de cirujanos experimentados, pueden presentarse complicaciones. Objetivos. Los objetivos del estudio fueron evaluar la frecuencia de perforaciones de la mucosa esofágica cuando se practica la miotomía de Heller para tratar la acalasia, determinar las características preoperatorias de los pacientes que presentan est...

  1. Identification of risk factors for mucosal injury during laparoscopic Heller myotomy for achalasia.

    Science.gov (United States)

    Tsuboi, Kazuto; Omura, Nobuo; Yano, Fumiaki; Hoshino, Masato; Yamamoto, Se-Ryung; Akimoto, Shusuke; Masuda, Takahiro; Kashiwagi, Hideyuki; Yanaga, Katsuhiko

    2016-02-01

    Mucosal injury during myotomy is the most frequent complication seen with the Heller-Dor procedure for achalasia. The present study aimed to examine risk factors for such mucosal injury during this procedure. This was a retrospective analysis of patients who underwent the laparoscopic Heller-Dor procedure for achalasia at a single facility. Variables for evaluation included patient characteristics, preoperative pathophysiological findings, and surgeon's operative experience. Logistic regression was used to identify risk factors. We also examined surgical outcomes and the degree of patient satisfaction in relation to intraoperative mucosal injury. Four hundred thirty-five patients satisfied study criteria. Intraoperative mucosal injury occurred in 67 patients (15.4%). In univariate analysis, mucosal injury was significantly associated with the patient age ≥60 years, disease history ≥10 years, prior history of cardiac diseases, preoperative esophageal transverse diameter ≥80 mm, and surgeon's operative experience with fewer than five cases. In multivariate analysis involving these factors, the following variables were identified as risk factors: age ≥60 years, esophageal transverse diameter ≥80 mm, and surgeon's operative experience with fewer than five cases. The mucosal injury group had significant extension of the operative time and increased blood loss. However, there were no significant differences between the two groups in the incidence of reflux esophagitis or the degree of symptom alleviation postoperatively. The fragile esophagus caused by advanced patient age and/or dilatation were risk factor for mucosal injury during laparoscopic Heller-Dor procedure. And novice surgeon was also identified as an isolated risk factor for mucosal injury.

  2. Thoracoscopic versus laparoscopic modified Heller Myotomy for achalasia: efficacy and safety in 87 patients.

    Science.gov (United States)

    Stewart, K C; Finley, R J; Clifton, J C; Graham, A J; Storseth, C; Inculet, R

    1999-08-01

    The ideal treatment for achalasia permanently eliminates the dysfunctional lower esophageal sphincter, relieving dysphagia and regurgitation; prevents gastroesophageal reflux; and has an acceptable morbidity rate. Controversy exists concerning whether the thoracoscopic Heller Myotomy (THM) or laparoscopic Heller myotomy (LHM) technique is the best approach to a modified Heller myotomy for achalasia. We performed a retrospective comparison of the patient characteristics, operative results, postoperative symptoms, and the learning curves for the procedures of 24 patients undergoing THM and 63 patients undergoing LHM between 1991 and 1998. Preoperative patient variables in each group revealed similar distributions for age, gender, and prevalence of previous pneumatic dilation. Mean operating room (OR) times were 4.3 hours (range 2.9 to 5.6 hours) for THM and 3.0 hours (range 1.5 to 6.5 hours) for LHM (p = 0.01). Three esophageal perforations occurred in the THM group and two in the LHM group. Conversion to an open procedure took place in five THM operations (21%) and one LHM operation (2%) (p = 0.005). There were no postoperative esophageal leaks. Mean postoperative length of stay (LOS) for THM was 6.1 days (range 1 to 17 days) and for LHM was 4.0 days (range 1 to 12 days) (p = 0.03). Learning-curve analysis of the first 24 LHM patients compared with the most recent 24 revealed greater OR time in the first 24 mean 3.6 hours, (range 2.0 to 6.5 hours) versus mean 2.3 hours, (range 1.5 to 3.7 hours; p = 0.01), and greater LOS mean 5.5 days, (range 3 to 12 days) versus mean 3.1 days, (range 1 to 8 days; p open procedure, and shorter LOS compared with THM. LHM was superior to THM in relieving dysphagia and preventing heartburn. LHM may be the preferred surgical treatment of achalasia in some patients.

  3. Heller myotomy with esophageal diverticulectomy: an operation in need of improvement.

    Science.gov (United States)

    Bowman, Ty A; Sadowitz, Benjamin D; Ross, Sharona B; Boland, Andrew; Luberice, Kenneth; Rosemurgy, Alexander S

    2016-08-01

    This study was undertaken to evaluate the outcomes after laparoscopic Heller myotomy with anterior fundoplication and diverticulectomy for patients with achalasia and esophageal diverticula. 634 patients undergoing laparoscopic Heller myotomy and anterior fundoplication from 1992 to 2015 are prospectively followed up; patients were stratified for those undergoing concomitant diverticulectomy. Patients graded symptom frequency and severity before and after myotomy, using a Likert scale (0 = never/not bothersome to 10 = always/very bothersome). Median data are presented (mean ± SD). Forty-four patients, age 70 years (65 ± 14.2), underwent laparoscopic Heller myotomy, anterior fundoplication, and diverticulectomy. Operative time was 182 min (183 ± 54.6). Fifty percentage of patients had a postoperative complication: Most notable were leaks at the diverticulectomy site (n = 8) and pulmonary complications (n = 11; 10 effusion, 1 empyema). Length of stay (LOS) was 3 days (5 ± 8.3). All leaks occurred after discharge and resolved without sequelae using transthoracic catheter drainage and parenteral nutrition; two patients received endoscopic esophageal stents. Median follow-up is 39 months. Symptoms amelioration was significant postoperatively, including severity of dysphagia [6 (6 ± 3.9) to 2(4 ± 3.6)]. Seventy-six percentage of patients rated their symptoms at last follow-up as satisfying/very satisfying. Seventy-seven percentage of patients had symptoms once per week or less. Eighty-one percentage would have the operation again knowing what they know now. Laparoscopic Heller myotomy, anterior fundoplication, and diverticulectomy well palliate the symptoms of achalasia with accompanying esophageal diverticulum. The operations are generally longer than those without diverticulectomy and are accompanied by a relatively longer LOS. Complications are relatively frequent and severe (e.g., leaks and pneumonia). In particular, leaks at the

  4. Las necesidades como análisis económico en Agnes Heller

    OpenAIRE

    Payá Martínez, Isaac

    2009-01-01

    En el presente trabajo trataré de analizar la importancia del estudio de las necesidades en Heller, a través de su implicación en la realidad económica. La autora rompe con la visión positivista de Maslow que analiza las necesidades en términos más bien cuantitativos y psicologizantes y llega a construirlas desde una visión histórico-social-antropológica, criticando la explicitación mercantilista de la satisfacción de las necesidades por parte de la sociedad capitalista, proponiendo a trav...

  5. Un caso de hipertrofia bilateral de quelas en el cangrejo violinista Uca cumulanta (Decapoda: Ocypodidae

    Directory of Open Access Journals (Sweden)

    Carlos Lira

    2006-12-01

    Full Text Available Un macho de Uca cumulanta con hipertrofia bilateral de quelas fue capturado durante en la Laguna de La Restinga, Isla de Margarita, Venezuela. Ambas quelas eran subiguales en tamaño y se asemejaban al quelípedo mayor de los machos normales.A case of bilateral cheliped hypertrophya crab Uca cumulanta (Decapoda: Ocypodidae. An adult male of Uca cumulanta with bilateral cheliped hypertrophy was found during a collection of crabs at La Restinga Lagoon, Margarita Island, Venezuela. Both chelipeds were sub equal in size, regarding the major cheliped of a normal male. Rev. Biol. Trop. 54 (Suppl. 3: 117-119. Epub 2007 Jan. 15.

  6. Health-related quality of life after laparoscopic Heller myotomy and Dor fundoplication for achalasia.

    Science.gov (United States)

    Asti, Emanuele; Sironi, Andrea; Lovece, Andrea; Bonavina, Giulia; Fanelli, Melania; Bonitta, Gianluca; Bonavina, Luigi

    2017-04-01

    In addition to symptom scores, a person's perception of health and quality of life assessment is an important indicator of quality of treatment and can provide an efficient index to compare different therapeutic modalities in chronic disease states. Only a few studies have investigated quality of life comprehensively in patients with achalasia, and therefore the controversy regarding the best treatment algorithm continues. The primary study outcome was pre- and postoperative quality of life in patients with achalasia undergoing laparoscopic Heller myotomy and Dor fundoplication. The study is a retrospective, observational cohort. The hospital registry and the updated research database were reviewed to identify all patients who were treated for achalasia between 2010 and 2015. Patients were eligible for the study if they had a minimum 1-year follow-up and had pre-and postoperative Eckardt, Short Form-36, and Gastro-Esophageal Reflux Disease Health-Related Quality of Life scores. Patients with previous operative and/or endoscopic treatments for achalasia were excluded. One-hundred and eighteen patients were identified. The median follow-up was 40 months (interquartile range 27). The proportion of patients with Eckardt stage II-III decreased from 94.9-13% (P Heller myotomy combined with Dor fundoplication. Copyright © 2016 Elsevier Inc. All rights reserved.

  7. Laparoscopic calibrated total vs partial fundoplication following Heller myotomy for oesophageal achalasia

    Science.gov (United States)

    Martino, Natale Di; Brillantino, Antonio; Monaco, Luigi; Marano, Luigi; Schettino, Michele; Porfidia, Raffaele; Izzo, Giuseppe; Cosenza, Angelo

    2011-01-01

    AIM: To compare the mid-term outcomes of laparoscopic calibrated Nissen-Rossetti fundoplication with Dor fundoplication performed after Heller myotomy for oesophageal achalasia. METHODS: Fifty-six patients (26 men, 30 women; mean age 42.8 ± 14.7 years) presenting for minimally invasive surgery for oesophageal achalasia, were enrolled. All patients underwent laparoscopic Heller myotomy followed by a 180° anterior partial fundoplication in 30 cases (group 1) and calibrated Nissen-Rossetti fundoplication in 26 (group 2). Intraoperative endoscopy and manometry were used to calibrate the myotomy and fundoplication. A 6-mo follow-up period with symptomatic evaluation and barium swallow was undertaken. One and two years after surgery, the patients underwent symptom questionnaires, endoscopy, oesophageal manometry and 24 h oesophago-gastric pH monitoring. RESULTS: At the 2-year follow-up, no significant difference in the median symptom score was observed between the 2 groups (P = 0.66; Mann-Whitney U-test). The median percentage time with oesophageal pH < 4 was significantly higher in the Dor group compared to the Nissen-Rossetti group (2; range 0.8-10 vs 0.35; range 0-2) (P < 0.0001; Mann-Whitney U-test). CONCLUSION: Laparoscopic Dor and calibrated Nissen-Rossetti fundoplication achieved similar results in the resolution of dysphagia. Nissen-Rossetti fundoplication seems to be more effective in suppressing oesophageal acid exposure. PMID:21876635

  8. Laparoscopic Dor versus Toupet fundoplication following Heller myotomy for achalasia: results of a multicenter, prospective, randomized-controlled trial.

    Science.gov (United States)

    Rawlings, Arthur; Soper, Nathaniel J; Oelschlager, Brant; Swanstrom, Lee; Matthews, Brent D; Pellegrini, Carlos; Pierce, Richard A; Pryor, Aurora; Martin, Valeria; Frisella, Margaret M; Cassera, Maria; Brunt, L Michael

    2012-01-01

    The type of fundoplication that should be performed in conjunction with Heller myotomy for esophageal achalasia is controversial. We prospectively compared anterior fundoplication (Dor) with partial posterior fundoplication (Toupet) in patients undergoing laparoscopic Heller myotomy. A multicenter, prospective, randomized-controlled trial was initiated to compare Dor versus Toupet fundoplication after laparoscopic Heller myotomy. Outcome measures were symptomatic GERD scores (0-4, five-point Likert scale questionnaire) and 24-h pH testing at 6-12 months after surgery. Data are mean ± SD. Statistical analysis was by Mann-Whitney U test, Wilcoxon signed rank test, and Freidman's test. Sixty of 85 originally enrolled and randomized patients who underwent 36 Dor and 24 Toupet fundoplications had follow-up data per protocol for analysis. Dor and Toupet groups were similar in age (46.8 vs. 51.7 years) and gender (52.8 vs. 62.5% male). pH studies at 6-12 months in 43 patients (72%: Dor n = 24 and Toupet n = 19) showed total DeMeester scores and % time pH Heller myotomy provides significant improvement in dysphagia and regurgitation symptoms in achalasia patients regardless of the type of partial fundoplication. Although a higher percentage of patients in the Dor group had abnormal 24-h pH test results compared to those of patients who underwent Toupet, the differences were not statistically significant.

  9. The reproductive aspects of the "guaiamum" crabs, Cardisoma guanhumi Latreille (Crustacea, Decapoda, Gecarcinidae) at the Sepetiba Bay mangrove, Rio de Janeiro, Brazil

    OpenAIRE

    Silva, Rejane da; Oshiro, Lídia Miyako Yoshii

    2002-01-01

    The objective of this work is to get knowledge about the "guaiamum" crabs reproduction. Two hundred and twenty four crabs were caught from August'96 to July'97. Their sex carapace color and morphometric data were obtained. The stages of gonadal development were macroscopically determined and the eggs diameter was measured. Three colors patters for the carapace for males, and four patters for females. Five stages of gonadal development were observed in female crabs, and two stages were observe...

  10. Spatial and seasonal distribution and population structure of the crab Aratus pisonii (H. Milne Edwards) (Crustacea, Decapoda, Sesarmidae) in Itacuruçá mangrove, Rio de Janeiro, Brazil

    OpenAIRE

    Nicolau, Cristiane F.; Oshiro, Lídia M. Y.

    2007-01-01

    Este trabalho teve por objetivo analisar a distribuição espacial e sazonal e a estrutura populacional do caranguejo arborícula Aratuspisonii (H. Milne Edwards, 1837). O trabalho foi realizado através de coletas mensais de junho de 2000 a maio de 2001, para estudo da estrutura populacional e coletas sazonais de janeiro a outubro de 2002 para o estudo da distribuição espacial e sazonal, dividiu-se o manguezal em três áreas. Para a distribuição espacial e sazonal foram capturados 694 indivíduos ...

  11. Shrimps of the crangonid genus Paracrangon Dana (Crustacea: Decapoda: Caridea from the northwestern Pacific: taxonomic review and description of a new species from Japan

    Directory of Open Access Journals (Sweden)

    Tomoyuki Komai

    2004-12-01

    Full Text Available The northwestern Pacific species of the crangonid genus Paracrangon Dana, 1852 are reviewed. Five species, including one new species, are recognised from the region: P. echinata Dana, 1852 (type species of the genus, P. abei Kubo, 1937, P. furcata Kubo, 1937, P. okutanii Ohé and Takeda, 1986, and P. ostlingos sp. nov. The geographical range of P. okutanii is extended to the northern South China Sea off southwestern Taiwan, representing the first discovery of species of the genus from tropical waters in the western Pacific. These species are diagnosed and illustrated. They are classified into two informal species groups, the P. echinata species group (including P. echinata, P. abei and P. okutanii, and two species from other regions, P. areolata Faxon, 1893 and P. australis Hanamura, Wadley and Taylor, 1999 and the P. furcata species group (P. furcata and P. ostlingos sp. nov.. New findings on the morphology of the genus are presented. The monophyly of Paracrangon is highly corroborated by a number of autapomorphic characters, but its relationship to other crangonid genera remains obscure. A revised key to aid in the identification of the species of Paracrangon is presented.

  12. Crustacea decapoda da praia rochosa da Ilha do Farol, Matinhos, Paraná: II. Distribuição espacial de densidade das populações

    Directory of Open Access Journals (Sweden)

    Setuko Masunari

    1998-01-01

    Full Text Available Decapod crustaceans from rocky shore at Farol Isle, Matinhos, Paraná, Brazil. II. Spatial distribution of population densities. A study of the spatial distribution of the decapod populations from a rocky shore at Farol Isle, Matinhos, State of Paraná, Brazil (25º51'S, 48º32'W was canied out. In the supralittoral the rocky surface is covered partially by a layer of litter coming from the terrestrial habitats; in the midlittoral boulders and pebbles cover the rocky basin and in the infralittoral, there is a belt of seaweeds. A total of 8 samples were taken by hand, two from each of the following levels: supralittoral (emersion time 8-12 hours, upper midlittoral (4-8, lower midlittoral (0-4 and limit between midlittoral and infralittoral, monthly, from May/1990 to April/1991. The number of species increased from supralittoral (5 to infralittoral (22 and a clear vertical zonation on density was observed according to the emersion time gradient. The supralittoral is characterized by grapsids Armases angustipes (Dana, (1852, Cyclograpsus integer H. Milne Edwards, 1837 and Metasesarma rubripes (Rathbun, 1897 which have terrestrial habits and aerial respiration as a main way in obtaining the oxygen. In the midlittoral, the decapods show three basic types of adaptation against emersion desiccation and thermal stresses: (1 by digging into wet mud among the stones such as Panopeus americanus Saussure, 1857, Panopeus occidentalis Saussure, 1857 and Eurypanopeus abbreviatus Stimpson, 1860, (2 by resting in shady and wet space between the boulders and pebbles or underside of them, like Pachygrapsus transversus (Gibbes, 1850, Petrolisthes armatus (Gibbes, 1850 and adults of Menippe nodifrons Stimpson, 1859 and (3 by clinging over the soaked filamentous algae layer on the pebbles or bouders surfaces, a strategy observed in small species such as Pilumnus dasypodus Kingsley, 1879, Podochela sp., Petrolisthes galathinus (Bosc, 1801 , Alpheus bouvieri A. Milne Edwards, 1878 and juveniles of Menippe nodifrons. In the infralittoral, small species which are vulnerable to desiccation stresses share space by diversification of their diet and adaptation strategies such as camouflage, body color change according to the substratum, flattened body for tight adhesion on hard surface and rapid movements. The main species of this zone are Petrolisthes armatus, Petrolisthes galathinus, juveniles of Menippe nodifrons, Epialtus brasiliensis Dana, 1852, P. dasypodus, Synalpheus fritzmuelleri Coutière, 1909, Megalobrachium roseum (Rathbun, 1900 and species of Palaemonidae. The rocky shore at Farol Isle is a complex architectural environment due to the conjunction of diversified habitats such as litter over a hard surface, spaces and crevices among boulders and pebbles, muddy substratum and phytal.

  13. Phylogeographic patterning among two codistributed shrimp species (Crustacea: Decapoda: Palaemonidae reveals high levels of connectivity across biogeographic regions along the South African coast.

    Directory of Open Access Journals (Sweden)

    Louisa E Wood

    Full Text Available We compare the genetic structuring and demographic history of two sympatric caridean shrimp species with distinct life history traits, one amphidromous species Palaemon capensis and one marine/estuarine species Palaemon peringueyi, in the historical biogeographical context of South Africa. A total of 103 specimens of P. capensis collected from 12 localities and 217 specimens of P. peringueyi collected from 24 localities were sequenced for the mitochondrial cytochrome oxidase one (CO1 locus. Results from analyses of molecular variance (AMOVA, pairwise ΦST comparisons and haplotype networks demonstrate weak to moderate genetic differentiation in P. capensis and P. peringueyi respectively. P. peringueyi exhibits partial isolation between populations associated with distinct biogeographic regions, likely driven by the region's oceanography. However, there is minimal evidence for the occurrence of discrete regional evolutionary lineages. This demonstrated lack of genetic differentiation is consistent with a marine, highly dispersive planktonic phase in both the amphidromous P. capensis and the marine/estuarine P. peringueyi. Bayesian skyline plots, mismatch expansions and time since expansion indicate that both species maintained stable populations during the Last Glacial Maximum (LGM, unlike other southern African aquatic species.

  14. Euastacus morgani sp. n., a new spiny crayfish (Crustacea, Decapoda, Parastacidae from the highland rainforests of eastern New South Wales, Australia

    Directory of Open Access Journals (Sweden)

    Jason Coughran

    2011-03-01

    Full Text Available Euastacus morgani sp. n., is described from a highland, rainforest site in Bindarri National Park, in eastern New South Wales, Australia. Euastacus morgani is found living sympatrically with two more common species, E. dangadi Morgan, 1997 and E. neohirsutus Riek, 1956. Systematically, the species belongs in the ‘simplex’ complex of the genus that includes E. simplex Riek, 1956, E. clarkae Morgan, 1997, E. maccai McCormack and Coughran 2008 and E. morgani. This new species differs from its nearest congenor, E. simplex, inthree mesial carpal spines. A key to the ‘simplex’ complex is presented.

  15. Digging deeper: new gene order rearrangements and distinct patterns of codons usage in mitochondrial genomes among shrimps from the Axiidea, Gebiidea and Caridea (Crustacea: Decapoda

    Directory of Open Access Journals (Sweden)

    Mun Hua Tan

    2017-03-01

    Full Text Available Background Whole mitochondrial DNA is being increasingly utilized for comparative genomic and phylogenetic studies at deep and shallow evolutionary levels for a range of taxonomic groups. Although mitogenome sequences are deposited at an increasing rate into public databases, their taxonomic representation is unequal across major taxonomic groups. In the case of decapod crustaceans, several infraorders, including Axiidea (ghost shrimps, sponge shrimps, and mud lobsters and Caridea (true shrimps are still under-represented, limiting comprehensive phylogenetic studies that utilize mitogenomic information. Methods Sequence reads from partial genome scans were generated using the Illumina MiSeq platform and mitogenome sequences were assembled from these low coverage reads. In addition to examining phylogenetic relationships within the three infraorders, Axiidea, Gebiidea, and Caridea, we also investigated the diversity and frequency of codon usage bias and mitogenome gene order rearrangements. Results We present new mitogenome sequences for five shrimp species from Australia that includes two ghost shrimps, Callianassa ceramica and Trypaea australiensis, along with three caridean shrimps, Macrobrachium bullatum, Alpheus lobidens, and Caridina cf. nilotica. Strong differences in codon usage were discovered among the three infraorders and significant gene order rearrangements were observed. While the gene order rearrangements are congruent with the inferred phylogenetic relationships and consistent with taxonomic classification, they are unevenly distributed within and among the three infraorders. Discussion Our findings suggest potential for mitogenome rearrangements to be useful phylogenetic markers for decapod crustaceans and at the same time raise important questions concerning the drivers of mitogenome evolution in different decapod crustacean lineages.

  16. The scyllarid lobsters (Crustacea: Decapoda: Palinuridea) collected by F. Peron and C.A. Lesueur during the 1800-1804 expedition to Australia

    NARCIS (Netherlands)

    Holthuis, L.B.

    1996-01-01

    The original figures of Scyllaridae by Lesueur and manuscript descriptions and notes by Péron, made during the 1800-1804 French Expedition to Australia, are now kept in the Museum d'Histoire Naturelle du Havre, and shed new light on the identity, type locality and whereabouts of these species. The

  17. Natural diet of the spiny lobster, Panulirus echinatus Smith, 1869 (Crustacea: Decapoda: Palinuridae, from São Pedro and São Paulo Archipelago, Brazil

    Directory of Open Access Journals (Sweden)

    CA. Góes

    Full Text Available The natural diet of the spiny lobster (Panulirus echinatus from the São Pedro and São Paulo Archipelago was determined by stomach contents analysis of sixty-eight adult lobsters collected during October 2002, March, July and August 2003. Food items were grouped by gross taxa representing 11 food categories. Analysis included a qualitative (Frequency of Occurrence of item i - FOi and a quantitative method (Volume of item i - Vi. A Feed Index (FI = FOi x Vi / 100 proposed by Lauzanne (1975 was also used to indicate the importance of each food category (>50: dominant, 25-50: essential, 10-25: unimportant, <10: secondary. The most important food category determined by % FOi and % Vi, was fish, followed by crustaceans, green algae, calcareous algae, and rocks. The remaining food categories contributed to less than 30% of FOi and 10% of Vi. Although the Feed Index revealed no dominant food category in the diet of P. echinatus, fish was considered essential, crustaceans unimportant, and the remaining food categories were classified as secondary. According to the analysis, P. echinatus can be properly classified as an omnivorous and a generalist species, because it consumes a great diversity of organisms in several trophic levels. This species presents an opportunistic behaviour, feeding on the prey available at substratum. Future studies should address variations in natural diet related to sex, reproductive cycle, and seasonality.

  18. Hemigrapsus takanoi Asakura and Watanabe, 2005 (Crustacea: Decapoda: Brachyura: Grapsoidea): first records of the brush-clawed shore crab from Great Britain

    OpenAIRE

    Wood, C. A.; Bishop, J. D. D.; Davies, Clare J.; Delduca, E. L.; Hatton, J. C.; Herbert, Roger J.H.; Clark, P. F.

    2015-01-01

    The brush-clawed shore crab is reported from the River Medway, Kent and the River Colne, Essex, England. These represent the first records of Hemigrapsus takanoi Asakura and Watanabe, 2005 from Great Britain. If H. takanoi becomes established in GB, it may pose a threat to populations of the native shore crab Carcinus maenas.

  19. A Breeding Population of the Western Pacific Crab Hemigrapsus sanguineus (Crustacea: Decapoda: Grapsidae) Established on the Atlantic Coast of North America.

    Science.gov (United States)

    McDermott, J J

    1991-08-01

    The west Pacific grapsid crab Hemigrapsus sanguineus was found in the United States for the first time in 1988. Additional crabs were recovered in 1990 from Townsends Inlet and Cape May Harbor, New Jersey (22 males, 16 females), and four of the females collected from June through September were ovigerous. Thus, H. sanguineus has now established itself in southern New Jersey, the first well-documented case of an exotic brachyuran becoming established along the east coast of the United States.

  20. Estudo do desenvolvimento de Lucifer faxoni Borradaille, 1915 (Crustacea, Decapoda, Sergestidae através das medidas do somito pré-bucal

    Directory of Open Access Journals (Sweden)

    Maria Paloma Jimenez Alvarez

    1988-01-01

    Full Text Available Foram estudados os estágios de desenvolvimento de Lucifer faxoni Borradaille ao largo de Santos, São Paulo, Brasil (24º16"S, 46º00W. A maturidade foi estabelecida em relação ao tamanho do somito pré-bucal As estações de maior abundãncia dos espécimes maduros, imaturos e larvais foram determinadas.The developmental stages of Lucifer faxoni Boradaille were studied off Santos, São Paulo, Brazil (24º16'S, 46º00'W. The maturity was established and related to the pre-buccal smite length. The seasons of greater abundance of mature, immature and larval specimens were determined.

  1. A new species of the snapping shrimp genus Alpheus (Crustacea: Decapoda: Caridea: Alpheidae) from Japan, associated with the innkeeper worm Ikedosoma elegans (Annelida: Echiura: Echiuridae).

    Science.gov (United States)

    Komai, Tomoyuki

    2015-12-15

    A new species of the snapping shrimp genus Alpheus Fabricius, 1798, Alpheus ikedosoma, is described and illustrated on the basis of material from Boso Peninsula and Ariake Sea, Japan. All examined specimens were extracted with the help of a bait suction pump from burrows of innkeeper worm (Annelida: Echiura), constructed on easily accessible intertidal sand beaches or sand flats. The host worm from Boso Peninsula was identified as Ikedosoma elegans (Ikeda, 1904) (Echiuridae). The new species is tentatively referred to the A. brevirostris (Olivier, 1811) species group, but it is characteristic in having several unusual features for the group, such as the very short rostrum without dorsal ridge, the absence of adrostral grooves on the carapace, the strongly reduced dorsolateral spines on the telson, the unarmed antennal basicerite, the non-elongate, almost glabrous major chela, and the lack of movable spines or spinules on ventromesial margin of each cheliped merus. The new species represents the sixth species of Alpheus associated with echiuran burrows.

  2. The tropical African hermit crab Pagurus mbizi (Crustacea, Decapoda, Paguridae in the Western Mediterranean Sea: a new alien species or filling gaps in the knowledge of the distribution?

    Directory of Open Access Journals (Sweden)

    J. E. GARCIA RASO

    2013-12-01

    Full Text Available We report the first occurrence in the European Mediterranean Sea of a tropical Atlantic hermit crab, Pagurus mbizi (Forest, 1955, based on the capture of twenty specimens (all sizes and ovigerous females collected along the northern shores of the Alboran Sea, which proof the existence of a well-established population of this species, and the importance of this geographic area as a transitional and settlement zone for Atlantic species, which makes the Alboran Sea one of the richest marine biodiversity areas in the Mediterranean Sea. Some morphological comparative data with the closely related hermit crab Pagurus pubescentulus are given. In addition, data on its habitat and geographical distribution, as well as the probable pathways of introduction, are commented.

  3. A new species of freshwater crab of the genus Oziotelphusa Müller, 1887 (Crustacea: Decapoda: Brachyura: Gecarcinucidae) from Tamil Nadu, southern India.

    Science.gov (United States)

    Raj, Smrithy; Kumar, Appukuttannair Biju; Ng, Peter K L

    2017-12-10

    A new species of gecarcinucid freshwater crab of the genus Oziotelphusa Müller, 1887, is described from stationary or slow-flowing bodies of water in Keeriparai near Nagercoil, in the state of Tamil Nadu in southern India. Oziotelphusa ravi, new species, is distinguished from its congeners by several distinct characters: the median tooth of the posterior margin of epistome forms a distinct bilobed tip in frontal view, the male pleonal somite 6 is narrowly trapezoidal and slightly wider than long with the lateral margins concave, the terminal segment of the male first gonopod is distinctly bent laterally (along the longitudinal axis) at an angle of about 45°, and the proximal part of the outer margin of the subterminal segment of the male first gonopod has a prominent deep concavity.

  4. Checklists of Crustacea Decapoda from the Canary and Cape Verde Islands, with an assessment of Macaronesian and Cape Verde biogeographic marine ecoregions.

    Science.gov (United States)

    GonzÁlez, JosÉ A

    2018-04-23

    The complete list of Canarian marine decapods (last update by González Quiles 2003, popular book) currently comprises 374 species/subspecies, grouped in 198 genera and 82 families; whereas the Cape Verdean marine decapods (now fully listed for the first time) are represented by 343 species/subspecies with 201 genera and 80 families. Due to changing environmental conditions, in the last decades many subtropical/tropical taxa have reached the coasts of the Canary Islands. Comparing the carcinofaunal composition and their biogeographic components between the Canary and Cape Verde archipelagos would aid in: validating the appropriateness in separating both archipelagos into different ecoregions (Spalding et al. 2007), and understanding faunal movements between areas of benthic habitat. The consistency of both ecoregions is here compared and validated by assembling their decapod crustacean checklists, analysing their taxa composition, gathering their bathymetric data, and comparing their biogeographic patterns. Four main evidences (i.e. different taxa; divergent taxa composition; different composition of biogeographic patterns; different endemicity rates) support that separation, especially in coastal benthic decapods; and these parametres combined would be used as a valuable tool at comparing biotas from oceanic archipelagos. To understand/predict south-north faunal movements in a scenario of regional tropicalization, special attention is paid to species having at the Canaries their southernmost occurrence, and also to tropical African warm-affinity species.

  5. On one new genus and three new species of freshwater crabs (Crustacea: Decapoda: Brachyura: Potamidae and Grapsidae) from Lanjak-Entimau, Sarawak, East Malaysia, Borneo

    NARCIS (Netherlands)

    Ng, P.K.L.

    1995-01-01

    The freshwater crabs obtained from the Lanjak-Entimau area in Sarawak, East Malaysia, Borneo, are reported upon. One new genus (Ibanum) and two new species of Potamidae (Ibanum aethes and Isolapotamon stuebingi) and a new species of Grapsidae (Geosesarma katibas) are described. The identity of

  6. The identity of the semiterrestrial crab Terrathelphusa kuchingensis (Nobili, 1901) (Crustacea: Decapoda: Brachyura: Gecarcinucidae), with descriptions of four new species from southwestern Sarawak, Borneo, Malaysia.

    Science.gov (United States)

    Grinang, Jongkar; Ng, Peter K L

    2015-04-10

    Four new species of semiterrestrial gecarcinucid crabs are described from limestone and sandstone habitats in southwestern Sarawak, Malaysia: Terrathelphusa aglaia n. sp., T. cerina n. sp., T. kundong n. sp., and T. mas n. sp. The taxonomy of T. kuchingensis (Nobili, 1901) is discussed, its precise identity ascertained from fresh material, and its actual distribution determined. This increases the number of Terrathelphusa species in Borneo to eight.

  7. Garthambrus, a new genus of deep water parthenopid crabs (Crustacea: Decapoda: Brachyura) from the Indo-Pacific, with description of a new species from the Seychelles

    NARCIS (Netherlands)

    Ng, P.K.L.

    1996-01-01

    A new genus of parthenopid crab, Garthambrus gen. nov., characterised by a broad carapace with strongly raised branchial and gastric regions, distinctive rostrum, sub-cylindrical ambulatory meri and a long distal segment of the second male pleopod, is established for six deep water species from

  8. Towards a revision of the genus Periclimenes: resurrection of Ancylocaris Schenkel, 1902, and designation of three new genera (Crustacea, Decapoda, Palaemonidae

    Directory of Open Access Journals (Sweden)

    Zdeněk Ďuriš

    2017-01-01

    Full Text Available Based on recently published molecular phylogenies of Indo-West Pacific palaemonid shrimps and further morphological evidence, the systematic position of several species of the polyphyletic genus Periclimenes is revised. The generic name Ancylocaris Schenkel, 1902 is re-established for the anemone-associated P. brevicarpalis. Actinimenes gen. n., is proposed for the anemone-associated P. inornatus, P. ornatellus and P. ornatus, all of which have a subspatulate first pereiopod. Cristimenes gen. n., is designated for the echinoderm-associated species, P. commensalis, P. cristimanus, and P. zanzibaricus, all with a unique carpo-propodal articulation of the second pereiopods. Rapimenes gen. n. is established for the hydroid and antipatharian-associated P. brucei, P. granulimanus, and P. laevimanus, for which the long, slender and unequal second pereiopods and prehensile ambulatory propodi are the main synapomorphic characters.

  9. A ocorrência, no litoral brasileiro, de um Portunidae (Crustacea, Decapoda, Brachyura, originário do Indo-Pacífico

    Directory of Open Access Journals (Sweden)

    Gustavo Augusto S. de Melo

    1982-01-01

    Full Text Available The portunid Scylla serrata, widely distributed in the Indo-Pacific, is reported for the first time from the Southwestern Atlantic. A female specimen was captured at Peruíbe, State of São Paulo, by a fishing boat, at a depth of approximately 15 m. A detailed description of the specimens is given, with data on the geographical distribution of the species, and a discussion of the taxonomic status of the genus.

  10. Two new species of the stenopodidean shrimp genus Spongiocaris Bruce & Baba, 1973 (Crustacea: Decapoda: Spongicolidae) from the Indo-West Pacific.

    Science.gov (United States)

    Komai, Tomoyuki; Grave, Sammy De; Saito, Tomomi

    2016-05-17

    Two new species of the deep-water spongicolid genus Spongiocaris Bruce & Baba, 1973, are described and illustrated from two localities in the Indo-West Pacific. Spongiocaris panglao n. sp. is described on the basis of material from the Bohol Sea, the Philippines, at depths of 220-731 m. Spongiocaris tuerkayi n. sp. is described on the basis of material from Atlantis Bank in the southwestern Indian Ocean at depths of 743-1053 m. Among eight known congeners, both new species appear close to S. semiteres Bruce & Baba, 1973, differing in the rostral length and armature, shape of the carapace, telsonal armature, development of the grooming apparatus of the first pereopod and shape of the third pereopod chela. An identification key to the species currently assigned to Spongiocaris is presented.

  11. New perspectives on the evolution of the genus Typhlatya (Crustacea, Decapoda): first record of a cavernicolous atyid in the Iberian Peninsula, Typhlatya miravetensis n. sp

    NARCIS (Netherlands)

    Sanz, Sebastián; Platvoet, Dirk

    1995-01-01

    On several occasions, shrimps belonging to a new species of the genus Typhlatya were collected in a cave in the province of Castellón, Spain. This is the first record of the genus in the Iberian Peninsula. The species is described and the validity, distribution, and zoogeography of the genus, as

  12. Abbreviated larval development of Macrobrachium inpa Kensley and Walker, 1982 (Crustacea: Decapoda: Palaemonidae from an Amazon Basin forest stream, Brazil, reared in the laboratory

    Directory of Open Access Journals (Sweden)

    Célio Magalhães

    Full Text Available Abstract This paper brings the description and illustrations of the abbreviated larval development of the Amazonian freshwater palaemonid shrimp, Macrobrachium inpa Kensley and Walker, 1982. The study was based on ovigerous females (mean total body length of 27.0 ± 1.64 mm collected in a small forest stream in the Reserva Florestal Ducke, near Manaus, Brazil, of which four released their larvae in the laboratory. The females carried 8 to 19 eliptical (2.39 ± 0.10 X 1.67 ± 0.08 mm, yolk-rich eggs. The larval period consists of three benthic, lecithotrophic larval stages, and lasts 10-11 days. The newly-hatched larvae bear very advanced morphological features such as antenna with several marginal plumose seta on scaphocerite and long, multi-articulated flagellum; fully developed, functional uniramous pereiopods 3-5 (walking legs and biramous pleopods. The morphology of the carapace, all appendages of the cephalothorax and pleon, and the tail fan are described in detail and illustrated. The larval form was considered to be a decapodid because of the benthic behavior and due to the fact that functional walking legs and pleopods are the main structures for displacement and propulsion. The larval development of M. inpa is compared with those of the so-called "continental" group of the caridean shrimps from the Amazon River basin.

  13. A new classification of the Xanthoidea sensu lato (Crustacea: Decapoda: Brachyura) based on phylogenetic analysis and traditional systematics and evaluation of all fossil Xanthoidea sensu lato

    NARCIS (Netherlands)

    Karasawa, H.; Schweitzer, C.E.

    2006-01-01

    A phylogenetic analysis was conducted including representatives from all recognized extant and extinct families of the Xanthoidea sensu lato, resulting in one new family, Hypothalassiidae. Four xanthoid families are elevated to superfamily status, resulting in Carpilioidea, Pilumnoidoidea,

  14. Short spatio-temporal variations in the population dynamics and biology of the deep-water rose shrimp Parapenaeus longirostris (Decapoda: Crustacea in the western Mediterranean

    Directory of Open Access Journals (Sweden)

    Beatriz Guijarro

    2009-03-01

    Full Text Available The deep-water rose shrimp Parapenaeus longirostris is a demersal decapod crustacean that is commercially exploited by trawl fleets. The present work compares its population dynamics, biology and condition in two locations (southern and north-western Mallorca in the Balearic Islands, western Mediterranean, separated by a distance of 120 km with different environmental conditions and explores the relationships between the species and certain environmental factors. Six multidisciplinary bimonthly surveys were carried out during 2003 and 2004 in these two locations (between 150 and 750 m depth in order to collect data on the demersal species with bottom trawl, the hydrography (temperature and salinity with CTD casts, and trophic resources (zooplankton in the water column and suprabenthos with Bongo net and Macer-GIROQ sledge respectively and sediments with a Shipeck dredge. The trawl fleets from both locations were monitored by monthly on board sampling and daily landings obtained from sales bills. Additional data was obtained from other trawl surveys. Temporal differences were detected both annually, with a decreasing trend over the last years in species abundance, and seasonally, in the biological indexes analysed. Bathymetric differences were also found in abundance, mean length, sex-ratio and condition of females. There were clear differences between the two locations studied, with higher abundance, condition and mean length and a lower length at first maturity for females in the north-western location. Trophic conditions could act as a link between geo-physical and biological changes. These short spatio-temporal differences could be due to the higher productivity found at this location, with higher density of preferred prey for the studied species together with adequate seafloor topography, sediment composition and hydrographical characteristics.

  15. Function and functional groupings of the complex mouth apparatus of the squat lobsters Munida sarsi Huus and M. tenuimana G.O. Sars (Crustacea: Decapoda)

    DEFF Research Database (Denmark)

    Garm, A; Høeg, J T

    2001-01-01

    Like all other decapods, the anomuran squat lobsters Munida sarsi and M. tenuimana have a mouth apparatus composed of six pairs of mouthparts plus labrum and paragnaths (upper and lower lips). To study the functional significance of this complexity, we examined the mouthparts with scanning electron...

  16. Pinnotherid crabs of the genus Dissodactylus Smith, 1870, associated with irregular sea urchins at the Caribbean coast of Colombia (Crustacea: Decapoda: Pinnotheridae)

    NARCIS (Netherlands)

    Werding, B.; Sanchez, H.

    1989-01-01

    Three species of the pinnotherid genus Dissodactylus were observed at the northern coast of the Colombian mainland and at Isla Providencia, associated with irregular sea urchins. While D. crinitichelis was previously known to occur at the continental coast of South America, D. rugatus and D.

  17. What is the diet of Palaemon elegans Rathke, 1837 (Crustacea, Decapoda, a non-indigenous species in the Gulf of Gdańsk (southern Baltic Sea?

    Directory of Open Access Journals (Sweden)

    Urszula Janas

    2008-06-01

    Full Text Available Palaemon elegans, a new component of the Gulf of Gdańsk macrozoobenthos,colonised the southern Baltic coastal zone in the late 20th and early 21stcentury. Analysis of the stomach contents of P. elegans revealed 16plant and animal taxa that these prawns had fed on. The principal dietarycomponent was detritus, with a mean frequency of occurrence in stomachs of > 80%.The most frequently occurring plant components in the diet were algaefrom the genus Cladophora and the family Ectocarpaceae, while the mostsignificant animal components were Harpacticoida, Chironomidae, Ostracoda andGammarus spp. The results of the study show that the dietary composition ofP. elegans differed significantly between stations and months. The foraging area consisted of two distinctive regions - the Inner Puck Bay, and the Outer Puck Bay together with the Dead Vistula River; two of the stations - Gdynia and Sopot - were distinctfrom all the others. However, no obvious seasonality in the food compositioncould be demonstrated.

  18. New records of xanthid crabs Atergatis roseus (Rüppell, 1830 (Crustacea: Decapoda: Brachyura from Iraqi coast, south of Basrah city, Iraq

    Directory of Open Access Journals (Sweden)

    Khaled Khassaf Al-Khafaji

    2017-06-01

    Full Text Available Specimens of the The Brachyuran crab Atergatis roseus (Ruppell, 1830, were collected for first times from Iraqi coast, south Al-Faw, Basrah city, Iraq, in coast of northwest of Arabian Gulf. Morphological features and distribution pattern of this species are highlighted and a figure is provided. The material was mostly collected from the shallow subtidal and intertidal areas using trawl net and hand.

  19. A new species of decorator crabs, genus Menaethiops Alcock, 1895 (Crustacea: Decapoda: Brachyura: Majoidea: Epialthidae), from Abu-Musa Island, Persian Gulf, Iran.

    Science.gov (United States)

    Naderloo, Reza

    2015-03-02

    Menaethiops abumusa n. sp. is closely similar to M. bicornis Alcock, 1985, and M. gadaniensis Kazmi & Tirmizi, 1999, regarding the relatively contiguous rostral spines. The new species is easily distinguishable from its two congeners by having distinctly round angles of orbital eaves and distally divergent rostral spines. Whereas in M. bicornis, and M. gadaniensis, the angles of orbital eaves are anteriorly produced and rostral spines are closely attached to each other along their entire length.  Other morphological differences include the carapace spination/granulation, basal antennal segments, and morphology of the male's first gonopod. Menaethiops gadaniensis was described from Gadani, Pakistan and was only known from the type locality, but is here recorded for the first time from the Gulf of Oman.

  20. Changes in ventilation and locomotion of Gammarus pulex (Crustacea, Amphipoda) in response to low concentrations of pharmaceuticals

    NARCIS (Netherlands)

    Lange, de H.J.; Peeters, E.T.H.M.; Lürling, M.F.L.L.W.

    2009-01-01

    Exposure to contaminants below lethal concentrations may affect the performance of organisms, resulting in measurable differences in behavior. We measured the response of the benthic invertebrate Gammarus pulex (Crustacea, Amphipoda) to sublethal concentrations of three pharmaceuticals, fluoxetine,

  1. Resultados inmediatos y tardíos de la miotomía de Heller laparoscópica en pacientes con acalasia esofágica

    OpenAIRE

    Ibáñez,Luis; Butte,Jean Michel; Pimentel,Fernando; Escalona,Alex; Pérez,Gustavo; Crovari,Fernando; Guzmán,Sergio; Llanos,Osvaldo

    2007-01-01

    Background: Achalasia is characterized by an incomplete relaxation of the lower esophageal sphincter. The best treatment is surgical and the laparoscopic approach may have good results. Aim: To assess the results of laparoscopic Heller myotomy among patients with achalasia. Material and methods: Prospective study of patients subjected to a laparoscopic Heller myotomy between 1995 and 2004. Clinical features, early and late operative results were assessed. Results: Twenty seven patients aged 1...

  2. Aspectos reproductivos del acocil Cambarellus (Cambarellus montezumae (Crustacea: Decápoda: Cambaridae en condiciones controladas Breeding aspects of the crayfish Cambarellus (Cambarellus montezumae (Crustacea: Decapoda: Cambaridae under controlled conditions

    Directory of Open Access Journals (Sweden)

    José Luis Arredondo-Figueroa

    2011-03-01

    Full Text Available El acocil Cambarellus (C. montezumae es una especie endémica cuya distribución está restringida a algunos cuerpos de agua lacustre. Se presentan los resultados sobre aspectos reproductivos de esta especie en condiciones controladas, con el objetivo de determinar la factibilidad de la producción de huevos y juveniles y su potencial aplicación a programas de rescate, repoblación y cultivo. Se realizaron 2 ensayos experimentales, el primero en 4 estanques exteriores de 800 litros conectados a sistemas cerrados de recirculación (SCR y el segundo en recipientes de plástico en laboratorio (RPL, de 2 litros. Para el primer ensayo, se manejaron 219 reproductores durante 335 días, obteniendo 136 hembras ovígeras. Cada hembra produjo en promedio 45 ± 23 huevos por puesta. El 83.7% de los huevos eclosionaron, obteniéndose un total de 3 162 juveniles. En los RPL se manejó una población F1 obtenida a partir de los reproductores del SCR en una relación 1 hembra: 2 machos, con 10 repeticiones. La producción de huevo fue variable con un promedio de 34 por hembra. Los indicadores de desempeño mostraron diferencias significativas (P ≤ 0.05 entre sexos con respecto a 6 de ellos. Los resultados indican la factibilidad para su cultivo y producción de huevos y juveniles.Cambarellus (C. montezumae is an endemic crayfish from Mexico, which actual distribution is restricted to few lacustrine bodies of water. Here we present results on the reproduction of this species under controlled conditions with the aim to determine the feasibility of the production of eggs and juveniles, as an strategy for their rescue, re-population and culture. Two experimental assays were conducted, the first one, in 4 outdoor 800-L tanks recirculation aquaculture systems (RAS and the second, in 2-L plastic containers under laboratory conditions (PCL. For the first assay, 219 brooders were used during 335 days , obtaining 136 ovigerous females. Each female produced an average of 45 ± 23 eggs per spawn.. The eclosioned eggs averaged 83.7%, obtaining 3 162 juveniles. In RPL, F1 organisms obtained from RAS were maintained in a relation of 1 female: 2 male with 10 repetitions. Egg production was variable with an average of 34 eggs per females. Performance indicators showed significant differences (P ≤ 0.05 between males and females in 6 indicators. Results indicated the feasibility of culture and production of eggs and juveniles.

  3. Ultraestrutura do espermatozóide de Ucides cordatus Linnaeus (Crustacea, Ocypodidae do litoral norte do Brasil Ultrastructure of spermatozoon of the crab Ucides cordatus Linaeus (Crustacea, Decapoda of the northern littoral of Brazil

    Directory of Open Access Journals (Sweden)

    Edilson Matos

    2000-09-01

    Full Text Available Ultrastructure of spermatozoa of the crab Ucides cordatus Linnaeus, 1763 is described and illustrated. Three parts can be distinguished: 1. the elongate-ovoid acrosome located anteriorly; 2. the cytoplasmic region; and 3. the nuclear region. The acrosome is composed of a thick electron-dense wall and a less electron-dense subacrosomal space. The cytoplasm region connects the acrosome with the nucleus, and three arms filled with microtubules arise from this region. The nucleus is polymorphous. The spermatozoon of Ucides cordatus follows the general pattern described for other Decapods.

  4. Robotic-assisted Heller myotomy: a modern technique and review of outcomes.

    Science.gov (United States)

    Afaneh, Cheguevara; Finnerty, Brendan; Abelson, Jonathan S; Zarnegar, Rasa

    2015-06-01

    Achalasia is a debilitating esophageal motility disorder characterized by incomplete relaxation of the lower esophageal sphincter and lack of peristalsis. Manometry is the gold standard for diagnosis and laparoscopic Heller myotomy has been the gold standard for definitive therapy. However, current advances in surgical technology have introduced the robotic platform as a viable approach for this procedure. The safety and efficacy has been clearly established with comparable operative times to laparoscopy in experienced hands. Importantly, the rate of resolution of dysphagia postoperatively is over 80% which is comparable to laparoscopic outcomes. Moreover, some literature suggests lower esophageal perforation rates utilizing the robotic platform. Nevertheless, costs remain one of the largest barriers to widespread use of the robotic platform and future studies should aim to identify strategies in cost reduction.

  5. Laparoscopic Heller Myotomy with Anterior Fundoplication Improves Frequency and Severity of Symptoms of Achalasia, Regardless of Preoperative Severity Determined by Esophagography.

    Science.gov (United States)

    Rosemurgy, Alexander; Downs, Darrell; Luberice, Kenneth; Rodriguez, Christian; Swaid, Forat; Patel, Krishen; Toomey, Paul; Ross, Sharona

    2018-02-01

    This study was undertaken to determine whether postoperative outcomes after laparoscopic Heller myotomy with anterior fundoplication could be predicted by preoperative findings on esophagography. Preoperative barium esophagograms of 135 patients undergoing laparoscopic Heller myotomy with anterior fundoplication were reviewed. The number of esophageal curves, esophageal width, and angulation of the gastroesophageal junction (GEJ) were determined; correlations between these determined parameters and symptoms were assessed using linear regression analysis. The number of esophageal curves correlated with the preoperative frequency of dysphagia, vomiting, chest pain, regurgitation, and heartburn. The width of the esophagus negatively correlated with the preoperative frequency of regurgitation. The angulation of the GEJ did not correlate with preoperative symptoms. Laparoscopic Heller myotomy with anterior fundoplication significantly reduced the frequency and severity of all symptoms, regardless of the number of esophageal curves, esophageal width, or angulation of the GEJ. Laparoscopic Heller myotomy with anterior fundoplication provides dramatic palliation for achalasia. More esophageal curves on preoperative esophagography correlate well with the frequency of a broad range of preoperative symptoms, including the frequency of dysphagia and regurgitation. Patients experience dramatically improved frequency and severity of symptoms after laparoscopic Heller myotomy with anterior fundoplication for achalasia regardless of the number of esophageal curves, esophageal width, or the angulation of the GEJ. Findings on barium esophagogram, in evaluating achalasia, should not deter the application of laparosocopic Heller myotomy with anterior fundoplication.

  6. First stage larva of the mud shrimp Nihonotrypaea makarovi Marin, 2013 (Decapoda: Axiidea: Callianassidae) obtained in the laboratory.

    Science.gov (United States)

    Korn, Olga M; Kornienko, Elena S; Golubinskaya, Darya D

    2016-02-19

    First stage larva of a new mud shrimp Nihonotrypaea makarovi Marin, 2013 (Decapoda: Axiidea: Callianassidae) obtained from the ovigerous female is described and illustrated for the first time. The first zoea of N. makarovi is well distinguished from the first larvae of N. japonica and N. petalura, sympatric callianassid species inhabiting Russian waters of the Sea of Japan, only by the greater size and by the presence of two terminal setae on the antennal endopod.

  7. Economic evaluation of the randomized European Achalasia trial comparing pneumodilation with Laparoscopic Heller myotomy.

    Science.gov (United States)

    Moonen, A; Busch, O; Costantini, M; Finotti, E; Tack, J; Salvador, R; Boeckxstaens, G; Zaninotto, G

    2017-11-01

    A recent multicenter randomized trial in achalasia patients has shown that pneumatic dilation resulted in equivalent relief of symptoms compared to laparoscopic Heller myotomy. Additionally, the cost of each treatment should be also taken in consideration. Therefore, the aim of the present study was to perform an economic analysis of the European achalasia trial. Patients with newly diagnosed achalasia were enrolled from to 2003 to 2008 in 14 centers in five European countries and were randomly assigned to either pneumatic dilation (PD) or laparoscopic Heller (LHM). The economic analysis was performed in the three centers in three different countries where most patients were enrolled (Amsterdam [NL], Leuven, [B] and Padova [I]) and then applied to all patients included in the study. The total raw costs of the two treatments per patient include the initial costs, the costs of complications, and the costs of retreatments. Two hundred and one patients, 107 (57 males and 50 females, mean age 46 CI: 43-49 years) were randomized to LHM and 94 (59 males and 34 females, mean age 46 CI 43-50 years) to PD. The total cost of PD per patient was quite comparable in the three different centers; €3397 in Padova, €3259 in Amsterdam and €3792 in Leuven. For LHM, the total costs per patient were highest in Amsterdam: €4488 in Padova, €6720 in Amsterdam, and €5856 in Leuven. In conclusion, the strategy of treating achalasia starting with PD appears the most economic approach, independent of the health system. © 2017 John Wiley & Sons Ltd.

  8. Peroral endoscopic myotomy achieves similar clinical response but incurs lesser charges compared to robotic heller myotomy.

    Science.gov (United States)

    Khashab, Mouen A; Kumbhari, Vivek; Tieu, Alan H; El Zein, Mohamad H; Ismail, Amr; Ngamruengphong, Saowanee; Singh, Vikesh K; Kalloo, Anthony N; Clarke, John O; Stein, Ellen M

    2017-01-01

    Several uncontrolled studies comparing peroral endoscopic myotomy (POEM) and Heller myotomy have demonstrated equivalent short-term efficacy and safety. However, no data exists rergarding the cost of POEM and how it compares to that of robotic Heller myotomy (RHM). The primary aim of this study was to compare the inpatient charges incurred in patients who underwent POEM or RHM for the treatment of achalasia. A retrospective single center review was conducted among 52 consecutive POEM patients (2012-2014) and 52 consecutive RHM patients (2009-2014). All RHM procedures included a Toupet fundoplication and were performed via a transabdominal approach. All POEM procedures were performed by a gastroenterologist in the endoscopy unit. Clinical response was defined by improvement of symptoms and decrease in Eckardt stage to ≤I. All procedural and facility charges were obtained from review of the hospital finance records. There was no difference between POEM and RHM with regards to age, gender, symptom duration, achalasia subtype, manometry findings, or Eckardt symptom stage. There was no significant difference in the rate of adverse events (19.2% vs 9.6%, P = 0.26) or the length of stay (1.9 vs. 2.3, P = 0.18) between both groups. Clinical response rate of patients in the POEM groups was similar to that in the RHM group (94.3% vs. 88.5%, P = 0.48). POEM incurred significantly less total charges compared to LHM ($14481 vs. $17782, P = 0.02). POEM when performed in an endoscopy unit was similar in efficacy and safety to RHM. However, POEM was associated with significant cost savings ($3301/procedure).

  9. Quantitative aspects of oxygen and carbon dioxide exchange ...

    African Journals Online (AJOL)

    Quantitative aspects of oxygen and carbon dioxide exchange through the ... ceratophthalmus (Crustacea: Decapoda) during rest and exercise in water and ... intersects zero time on the x-axis, indicating rapid gas exchange at the lung surface.

  10. Distribution of Mysidium integrum (Tattersall) (Crustacea-mysidacea) in Venezuelan coral habitats

    NARCIS (Netherlands)

    Zoppi de Roa, Evelyn; Pedro Alonso, G.

    1997-01-01

    ZOPPI DE ROA, EVELYN & PEDRO ALONSO G.: Distribution of Mysidium integrum (Tattersall) (Crustacea: Mysidacea) in Venezuelan coral habitats. Studies Nat. Hist. Caribbean Region 73, Amsterdam 1997: 55-62. This paper reports the occurrence, distribution and some ecological aspects of mysids in six

  11. .i.Moraria brevipes./i. (Crustacea: Copepoda) in South Bohemian forest soils

    Czech Academy of Sciences Publication Activity Database

    Háněl, Ladislav; Christian, E.

    2004-01-01

    Roč. 68, - (2004), s. 169-171 ISSN 1211-376X R&D Projects: GA ČR(CZ) GA206/99/1416 Institutional research plan: CEZ:AV0Z6066911 Keywords : forest floor * spruce * Crustacea Subject RIV: EH - Ecology, Behaviour

  12. Phylogeny and evolution of life history strategies of the Parasitic Barnacles (Crustacea, Cirripedia, Rhizocephala)

    DEFF Research Database (Denmark)

    Glenner, Henrik; Hebsgaard, Martin Bay

    2006-01-01

    The barnacles (Crustacea, Cirripedia) consist of three well-defined orders: the conventional filter-feeding barnacles (Thoracica), the burrowing barnacles (Acrothoracica), and the parasitic barnacles (Rhizocephala). Thoracica and Acrothoracica feed by catching food particles from the surrounding ...... crustaceans (Anomura), which includes hermit crabs and squat lobsters....

  13. New records of Decapod Crustacea from the Mediterranean coast of Israel and the eastern Mediterranean

    NARCIS (Netherlands)

    Lewinsohn, Ch.; Holthuis, L.B.

    1964-01-01

    Since the publication by Holthuis & Gottlieb (1958) of a list of the Decapod Crustacea known at that time to inhabit the Mediterranean waters of Israel, several additional species, 18 in number, have been found in the area, while just prior to the issue of the paper by Holthuis & Gottlieb a

  14. Dinámica temporal en la relación entre el isópodo parásito Aporobopyrus curtatus (Crustacea: Isopoda: Bopyridae y el cangrejo anomuro Petrolisthes armatus (Crustacea: Decapoda: Porcellanidae en el sur de Brasil Temporal dynamic of the relationship between the parasitic isopod Aporobopyrus curtatus (Crustacea: Isopoda: Bopyridae and the anomuran crab Petrolisthes armatus (Crustacea: Decapoda: Porcellanidae in southern Brazil

    Directory of Open Access Journals (Sweden)

    Ivana Miranda

    2010-01-01

    Full Text Available The prevalence of the parasite Aporobopyrus curtatus in Petrolisthes armatus from southern Brazil was determined, and the effect the parasite had on host reproduction was evaluated. Of all 775 crabs sampled in Araçá region from March 2005 to July 2006, 3.2% presented bopyrid parasites. All the parasitized individuals had one branchial chamber occupied by two mature parasites, with no preference for the right or left chamber. Male and female hosts were infested in equal proportions. Parasitized juveniles, large individuals and ovigerous females were not found in our study. The absence of parasitized ovigerous females seems to be insufficient evidence to support the hypothesis of parasitic castration and would require a histological study to confirm their reproductive death. The percentage of infestation observed in our study (3.1% is lower than the one found in other studies and it could indicate the existence of factor(s regulating the density of A. curtatus in the Araçá region. At least in this population, the low but constant presence of the bopyrid A. curtatus population did not appear to have a negative effect on the porcellanid population, and parasitized individuals did not play a significant role in the natural history of P. armatus.Se determinó la prevalencia del parásito Aporobopyrus curtatus en Petrolisthes armatus en el sur de Brasil y se evaluó el efecto de su presencia en la reproducción de su huésped. De marzo de 2005 a julio de 2007 se muestreó en la Región de Araçá un total de 775 cangrejos, de los cuales el 3,2% presentó bopíridos parásitos. Todos los individuos parasitados presentaron una cámara branquial ocupada por dos parásitos maduros, sin preferencia por la cámara derecha o izquierda. Machos y hembras hospedadores fueron infectados en la misma proporción. La ausencia de parásitos en hembras ovígeras no es evidencia suficiente para apoyar la hipótesis de castración parasítica, y se necesita un estudio histológico para confirmar la muerte reproductiva. El porcentaje de infectación observado (3,1% es inferior al encontrado en otros estudios y puede ser indicativo de la existencia de factor(es que regulan la densidad de A. curtatus en la región de Araçá. En conclusion, estos resultados sugieren que, al menos en esta población, la baja y constante incidencia del bopírido A. curtatus parece no afectar la población del porcelánido, y los individuos parasitados no tienen un papel significativo en la historia natural de P. armatus.

  15. Peter Heller's a Child Analysis with Anna Freud: the significance of the case for the history of child psychoanalysis.

    Science.gov (United States)

    Midgley, Nick

    2012-02-01

    A Child Analysis with Anna Freud, a collection of Anna Freud's detailed case notes of her treatment of the young Peter Heller between 1929 and 1932, was first published in English in 1990. Not only does this work give us direct access to Anna Freud's ways of thinking and working at a crucial period in the early history of child analysis; it is also one of the few records of an adult reflecting in depth on the experience of being in analysis as a child. Yet to date this work has received little attention in the psychoanalytic literature. In an attempt to redress this neglect, the Heller case study is placed in the context of Anna Freud's emerging ideas about child analysis. In particular, its significance in the development of her psychoanalytic thinking is investigated in the light of her 1927 book, The Technique of Child Analysis.

  16. The evaluation of functional results before and after laparoscopic Heller myotomy for achalasia: a single center experience.

    Science.gov (United States)

    Pooshani, Abdollah; Frootan, Mojgan; Abdi, Saeed; Jahani-Sherafat, Somayeh; Kamani, Freshteh

    2017-01-01

    The aim of this study was to evaluate and compare the functional results before and after laparoscopic Heller myotomy for Iranian patients with achalasia. Achalasia is a severe neuromuscular disorder of the esophagus, characterized by the loss of peristalsis and an inability of the lower esophageal sphincter (LES) to reach optimal relaxation. In this cross sectional study, patients who underwent Heller myotomy for achalasia via laparoscopy in Taleghani Hospital Tehran, Iran were evaluated. Symptoms including pressure of residual, integrated relaxation sphincter (IRP), pressure of free drinking, pressure of LES, dysphasia score and peristalsis movement was measured and recorded by manometry before and after (2 months) treating with Heller myotomy. In this study, 23 patients with achalasia (12 females and 11 males) with a mean age of 30±3.5 years (minimum 20, maximum 44 years) who met the inclusion criteria of the study were examined. Results of this study showed that, all the diagnostic criteria that were measured before the treatment was significantly different from after the treatment (PHeller myotomy surgery can be as a treatment of choice for achalasia. Free Drinking pressure can be a suitable criteria after treatment for evaluation and prediction of the reducing the dysphasia score after the surgery.

  17. First record of Naushonia sp. (Decapoda: Laomediidae) larva from the Equatorial Atlantic.

    Science.gov (United States)

    De Albuquerque Lira, Simone Maria; De Santana, Claudeilton Severino; Schwamborn, Ralf

    2018-02-26

    The first zoeal-stage larva of a possibly new species of mud shrimp Naushonia (Decapoda: Gebiidea: Laomediidae) was described from plankton samples taken off the Fernando de Noronha Archipelago, being the first occurrence at the oceanic islands of the Equatorial Atlantic. Five zoea I larvae were obtained and dissected for observation of mouthparts. This zoea I of Naushonia sp. is well distinguished from the first larvae of N. portoricensis (Rathbun 1901) from the Caribbean and N. cangronoides (Kingsley 1897) from the Northwest Atlantic in terms of development and setation of appendages, and possibly belongs to a new, undescribed species. The present study widens the knowledge on tropical oceanic decapod larvae and provides detailed drawings and new photographic illustrations with extended depth of field of these organisms.

  18. On the origin and evolution of Antarctic Peracarida (Crustacea, Malacostraca

    Directory of Open Access Journals (Sweden)

    Angelika Brandt

    1999-12-01

    Full Text Available The early separation of Gondwana and the subsequent isolation of Antarctica caused a long evolutionary history of its fauna. Both, long environmental stability over millions of years and habitat heterogeneity, due to an abundance of sessile suspension feeders on the continental shelf, favoured evolutionary processes of preadapted taxa, like for example the Peracarida. This taxon performs brood protection and this might be one of the most important reasons why it is very successful (i.e. abundant and diverse in most terrestrial and aquatic environments, with some species even occupying deserts. The extinction of many decapod crustaceans in the Cenozoic might have allowed the Peracarida to find and use free ecological niches. Therefore the palaeogeographic, palaeoclimatologic, and palaeo-hydrographic changes since the Palaeocene (at least since about 60 Ma ago and the evolutionary success of some peracarid taxa (e.g. Amphipoda, Isopoda led to the evolution of many endemic species in the Antarctic. Based on a phylogenetic analysis of the Antarctic Tanaidacea, Sieg (1988 demonstrated that the tanaid fauna of the Antarctic is mainly represented by phylogenetically younger taxa, and data from other crustacean taxa led Sieg (1988 to conclude that the recent Antarctic crustacean fauna must be comparatively young. His arguments are scrutinized on the basis of more recent data on the phylogeny and biodiversity of crustacean taxa, namely the Ostracoda, Decapoda, Mysidacea, Cumacea, Amphipoda, and Isopoda. This analysis demonstrates that the origin of the Antarctic fauna probably has different roots: an adaptive radiation of descendants from old Gondwanian ancestors was hypothesized for the isopod families Serolidae and Arcturidae, an evolution and radiation of phylogenetically old taxa in Antarctica could also be shown for the Ostracoda and the amphipod family Iphimediidae. A recolonization via the Scotia Arc appears possible for some species, though it is

  19. Peroral endoscopic myotomy as salvation technique post-Heller: International experience.

    Science.gov (United States)

    Tyberg, Amy; Sharaiha, Reem Z; Familiari, Pietro; Costamagna, Guido; Casas, Fernando; Kumta, Nikhil A; Barret, Maximilien; Desai, Amit P; Schnoll-Sussman, Felice; Saxena, Payal; Martínez, Guadalupe; Zamarripa, Felipe; Gaidhane, Monica; Bertani, Helga; Draganov, Peter V; Balassone, Valerio; Sharata, Ahmed; Reavis, Kevin; Swanstrom, Lee; Invernizzi, Martina; Seewald, Stefan; Minami, Hitomi; Inoue, Haruhiro; Kahaleh, Michel

    2018-01-01

    Treatment for achalasia has traditionally been Heller myotomy (HM). Despite its excellent efficacy rate, a number of patients remain symptomatic post-procedure. Limited data exist as to the best management for recurrence of symptoms post-HM. We present an international, multicenter experience evaluating the efficacy and safety of post-HM peroral endoscopic myotomy (POEM). Patients who underwent POEM post-HM from 13 centers from January 2012 to January 2017 were included as part of a prospective registry. Technical success was defined as successful completion of the myotomy. Clinical success was defined as an Eckardt score of ≤3 on 12-month follow up. Adverse events (AE) including anesthesia-related, operative, and postoperative complications were recorded. Fifty-one patients were included in the study (mean age 54.2, 47% male). Technical success was achieved in 100% of patients. Clinical success on long-term follow up was achieved in 48 patients (94%), with a mean change in Eckardt score of 6.25. Seven patients (13%) had AE: six experienced periprocedural mucosal defect treated endoscopically and two patients developed mediastinitis treated conservatively. For patients with persistent symptoms after HM, POEM is a safe salvation technique with good short-term efficacy. As a result of the challenge associated with repeat HM, POEM might become the preferred technique in this patient population. Further studies with longer follow up are needed. © 2017 Japan Gastroenterological Endoscopy Society.

  20. Learning curve for laparoscopic Heller myotomy and Dor fundoplication for achalasia.

    Science.gov (United States)

    Yano, Fumiaki; Omura, Nobuo; Tsuboi, Kazuto; Hoshino, Masato; Yamamoto, Seryung; Akimoto, Shunsuke; Masuda, Takahiro; Kashiwagi, Hideyuki; Yanaga, Katsuhiko

    2017-01-01

    Although laparoscopic Heller myotomy and Dor fundoplication (LHD) is widely performed to address achalasia, little is known about the learning curve for this technique. We assessed the learning curve for performing LHD. Of the 514 cases with LHD performed between August 1994 and March 2016, the surgical outcomes of 463 cases were evaluated after excluding 50 cases with reduced port surgery and one case with the simultaneous performance of laparoscopic distal partial gastrectomy. A receiver operating characteristic (ROC) curve analysis was used to identify the cut-off value for the number of surgical experiences necessary to become proficient with LHD, which was defined as the completion of the learning curve. We defined the completion of the learning curve when the following 3 conditions were satisfied. 1) The operation time was less than 165 minutes. 2) There was no blood loss. 3) There was no intraoperative complication. In order to establish the appropriate number of surgical experiences required to complete the learning curve, the cut-off value was evaluated by using a ROC curve (AUC 0.717, p < 0.001). Finally, we identified the cut-off value as 16 surgical cases (sensitivity 0.706, specificity 0.646). Learning curve seems to complete after performing 16 cases.

  1. Learning curve for laparoscopic Heller myotomy and Dor fundoplication for achalasia.

    Directory of Open Access Journals (Sweden)

    Fumiaki Yano

    Full Text Available Although laparoscopic Heller myotomy and Dor fundoplication (LHD is widely performed to address achalasia, little is known about the learning curve for this technique. We assessed the learning curve for performing LHD.Of the 514 cases with LHD performed between August 1994 and March 2016, the surgical outcomes of 463 cases were evaluated after excluding 50 cases with reduced port surgery and one case with the simultaneous performance of laparoscopic distal partial gastrectomy. A receiver operating characteristic (ROC curve analysis was used to identify the cut-off value for the number of surgical experiences necessary to become proficient with LHD, which was defined as the completion of the learning curve.We defined the completion of the learning curve when the following 3 conditions were satisfied. 1 The operation time was less than 165 minutes. 2 There was no blood loss. 3 There was no intraoperative complication. In order to establish the appropriate number of surgical experiences required to complete the learning curve, the cut-off value was evaluated by using a ROC curve (AUC 0.717, p < 0.001. Finally, we identified the cut-off value as 16 surgical cases (sensitivity 0.706, specificity 0.646.Learning curve seems to complete after performing 16 cases.

  2. Specific esophagogram to assess functional outcomes after Heller's myotomy and Dor's fundoplication for esophageal achalasia.

    Science.gov (United States)

    Tsoukali, E; Gouvas, N; Tsiaoussis, J; Pechlivanides, G; Zervakis, N; Mantides, A; Xynos, E

    2011-09-01

    Esophageal emptying assessed at the 'timed barium' esophagogram correlates well with symptomatic outcomes after pneumatic dilation for esophageal achalasia, although 30% of patients with satisfactory outcome exhibit partial improvement in emptying. The aim of the study was to investigate any correlation of esophageal emptying to symptomatic response after laparoscopic Heller's myotomy and Dor's fundoplication. 'Bread and barium' (transit time of a barium opaque bread bolus) and 'timed barium' (height of esophageal barium column 5 minutes after ingestion of 200-250 mL of barium suspension) esophagogram was used to assess esophageal emptying in 73 patients with esophageal achalasia before 1 and 5 years (31 cases) after laparoscopic myotomy and anterior fundoplication. Symptoms assessment was based to a specific score. At 1-year follow-up, excellent and good symptomatic results were obtained in 95% of the cases. Esophageal maximum diameter, esophageal transit time, and esophageal barium column were significantly correlated to each other and to symptom score postoperatively (P achalasia. Complete symptomatic relief does not necessarily reflect complete esophageal emptying. Outcomes do not deteriorate by time. Because of wide availability, esophagogram can be applied in follow-up of postmyotomy patients in conjunction with symptomatic evaluation. © 2011 Copyright the Authors. Journal compilation © 2011, Wiley Periodicals, Inc. and the International Society for Diseases of the Esophagus.

  3. Removal of off-flavours in some Australian crustacea by ionising radiation

    International Nuclear Information System (INIS)

    Freeman, D.J.

    1985-01-01

    Development of an export industry based on the deep sea royal red prawn, haliporoides sibogae and the shallow water shovel nosed lobster or balmain bug, lbacus peronii has been hampered by the sweet garlic off-flavour often encountered in both these species. A method for removing this noxious odour was developed which involved gamma irradiation of the affected crustacea using a cobalt-60 source

  4. Four new species of the genus Rhopalophthalmus (Mysidacea: Crustacea) from the northwest coast of India

    Digital Repository Service at National Institute of Oceanography (India)

    Panampunnayil, S.U.; Biju, A.

    Four new species of the genus Rhopalophthalmus (Mysidacea: Crustacea) from the north west coast of India PANAMPUNNAYIL S.U. AND BIJU. A* National Institute of Oceanography, Regional Centre, Kochi-18, India *Email: biju_nio@yahoo.com Abstract... setae on distal border (Figures 7, 8). Inner lobe of maxillule with five plumose setae and three stout barbed spines, outer lobe with nine strong spines on distal border (Figure 9). Maxilla with large basal lobe and deeply cleft distal lobe; exopod...

  5. External morphology of Lightiella monniotae (Crustacea, Cephalocarida) in the light of Cambrian 'Orsten' crustaceans

    DEFF Research Database (Denmark)

    Olesen, Jørgen; Haug, Joachim T.; Maas, Andreas

    2011-01-01

    The species-poor meiofaunal Cephalocarida have played an important role in discussions of the phylogeny and evolution of Crustacea since their discovery in 1955. One reason may be that the morphology of cephalocarids includes some aspects of putatively ancient appearance, such as the simple roof-...... has again proved to be especially appropriate because of the small size of these animals, and because it permits direct comparisons with other similarly small crustaceans and the ‘Orsten’ crustaceans and their larvae....

  6. Survey of Biofouling an Australian Navy Ships: Crustacea; Isopoda and Amphipoda; Caprellidea

    Science.gov (United States)

    2008-01-01

    amphipod behaviour and predatory strikes by fish . Journal of experimental marine Biology and Ecology 126:173-180, 1989. W. T. Calman. Crustacea. In...Limnoriidea and Sphaeromatidae be used to better reflect their phylogeny . In considering the suitability of maintaining the suborder Flabellifera, it...Caprellidae). Estuarine and Coastal Marine Science 10:225-237, 1979. E. A. Caine. Comparitive functional morphology of feeding in three species of

  7. Comparação da estrutura populacional das espécies de Uca (Crustacea: Decapoda: Ocypodidae no Manguezal de Itacuruçá, Rio de Janeiro, Brasil Comparison of the population structure of the species of Uca (Crustacea: Decapoda: Ocypodidae in the mangrove of Itacuruçá, Rio Janeiro, Brazil

    Directory of Open Access Journals (Sweden)

    Luciane M. Bedê

    2008-12-01

    Full Text Available Este trabalho foi realizado no Manguezal de Itacuruçá, na Baía de Sepetiba com o objetivo de analisar a estrutura populacional das espécies de Uca Leach, 1814. Foram realizadas coletas de junho/2005 a maio/2006, durante as marés baixas. Os caranguejos foram capturados manualmente por duas pessoas e durante 15 minutos. Um total de 2580 animais foi coletado, sendo 1465 machos e 1115 fêmeas. Com relação ao tamanho dos indivíduos, observou-se que os animais do Manguezal de Itacuruçá, de maneira geral, apresentam tamanhos menores que os encontrados em outros manguezais do Brasil. Contudo, os machos atingiram tamanhos maiores do que as fêmeas. A distribuição de freqüência em todas as classes de tamanho foi unimodal para a maioria das espécies, com exceção de U. thayeri Rathbun, 1900 e U. vocator (Herbst, 1804, as quais não apresentaram um padrão definido. Os machos foram mais abundantes em todas as classes de maiores tamanhos. A razão sexual diferiu significativamente da proporção 1:1, estando deslocada para uma maior freqüência de machos, com exceção de U. thayeri e U. victoriana von Hagen, 1987, as quais tiveram predominância de fêmeas.This study was conducted in the Itacuruçá mangrove, in the Sepetiba Bay, Rio de Janeiro, Brazil, with the objective of investigating the population structure of the species of Uca Leach, 1814. Sampling was carried out monthly from June, 2005 to May, 2006, during low tides. Crabs were captured manually by two people for a period of 15 min each. A total of 2580 crabs were obtained, of which 1465 were males and 1115 were females. The size of the fiddler crabs in the mangrove of Itacuruçá were the smallest reported so far in Brazilian mangroves. However, males attained a larger size than females. The size frequency distribution was unimodal for most of species, with the exception of U. thayeri Rathbun, 1900 and U. vocator (Herbst, 1804, which did not show a clearly-defined pattern. Males were most abundant among the largest size classes. The sex ratio differed significantly from 1:1 (male: female, most often with a higher frequency of males, except for U. thayeri and U. victoriana von Hagen, 1987, in which females were predominant.

  8. Comparação da estrutura populacional das espécies de Uca (Crustacea: Decapoda: Ocypodidae) no Manguezal de Itacuruçá, Rio de Janeiro, Brasil Comparison of the population structure of the species of Uca (Crustacea: Decapoda: Ocypodidae) in the mangrove of Itacuruçá, Rio Janeiro, Brazil

    OpenAIRE

    Luciane M. Bedê; Lídia M. Y. Oshiro; Luziane M. D. Mendes; Alessandra A. Silva

    2008-01-01

    Este trabalho foi realizado no Manguezal de Itacuruçá, na Baía de Sepetiba com o objetivo de analisar a estrutura populacional das espécies de Uca Leach, 1814. Foram realizadas coletas de junho/2005 a maio/2006, durante as marés baixas. Os caranguejos foram capturados manualmente por duas pessoas e durante 15 minutos. Um total de 2580 animais foi coletado, sendo 1465 machos e 1115 fêmeas. Com relação ao tamanho dos indivíduos, observou-se que os animais do Manguezal de Itacuruçá, de maneira g...

  9. Desenvolvimento "in vitro" de larvas e juvenis de Emerita brasiliensis Schmitt (Crustacea, Decapoda, Hippidae sob diferentes condições de temperatura, salinidade e regime alimentar "In vitro" development of larvae and juveniles of the sand crab Emerita brasiliensis Schmitt (Crustacea, Decapoda, Hippidae under different conditions of temperature, salinity and food diet

    Directory of Open Access Journals (Sweden)

    Ana Clara P. Otegui

    2007-06-01

    Full Text Available Larvas eclodidas em laboratório e juvenis coletados em campo do tatuí Emeritabrasiliensis (Hippidae foram cultivados em diferentes temperaturas e regime alimentar com a finalidade de avaliar as melhores condições para a manutenção da espécie em laboratório. O efeito da freqüência da substituição da água de cultivo sobre o desenvolvimento larvar também foi estudado avaliando-se a sobrevivência, o crescimento e a duração dos estádios larvares. A duração das fases larvares e o crescimento das três últimas fases de zoea correlacionaramse positivamente com a temperatura. As temperaturas testadas, entre 18 e 26ºC não influenciaram a sobrevivência das larvas. Não houve influencia da alimentação e nem da troca de água no desenvolvimento, crescimento e sobrevivência das larvas, bem como das dietas de microalgas na sobrevivência e desenvolvimento dos juvenis.Hatched larvae and field sampled juveniles of the sand crab Emeritabrasiliensis were reared at different temperatures and food diet in order to evaluate the best conditions for laboratory maintenance. The effects of frequency of changing the aquarium seawater on larval development was also studied evaluating the survival, growth and duration of larval stages. The duration of larval stage and growth of the last three zoes phases correlate positively with temperature. Temperatures between 18 and 26ºC did not influence the larval survival. The kind of food and frequency of water exchange did not influence the development, growth, and survival of larvae, as well as the development, and survival of juveniles.

  10. Ablação ocular no camarão Macrobrachium rosenbergii (De Man (Crustacea, Decapoda, Palaemonidae: efeitos sobre a reprodução, pigmentação epidérmica e atividade alimentar Eyestalk ablation in the prawn Macrobrachium rosenbergii (De Man (Crustacea, Decapoda, Palaemonidae: effects on reproduction, epidermic pigmentation and feeding activity

    Directory of Open Access Journals (Sweden)

    Marcel José Martins dos Santos

    2000-09-01

    Full Text Available This study analyze the consequences of unilateral and bilateral ablation based on ovigerous percentage, consecutive spawns, and secondary effects of the surgical process in the females of Macrobrachium rosenbergii (De Man, 1879. Two experiments were carried out with four and seven months old females in intermolt stage. Each experiment was comprised of control, unilateral and bilateral ablation. Eyestalk ablation was done with a bistoury with a topic hot cauterization followed by application of antibiotic pomades. The animals were maintained at constant temperature (28 ± 1,05ºC and photoperiod of 12L: 12D within fibercement boxes with sandy bottom and biological filter. Females were observed once a day during fourteen weeks, registering gonadal condition, ecdysis and presence of spermatophore (mating and spawning. Unilateral ablation technique is more efficient due to the anticipation of the first spawn, repeatability between spawns, expressive rate of ovigerous females and survival, that favored its applicability. Bilateral eyestalk ablation produced the mortality of ali the females with change in coloration and food activity patterns. These results corroborate other observations on penaeid shrimps. though bilateral ablation on some lobsters was a success. These results showing an interespecific variation and can be used in aquaculture projects.

  11. Comparação do crescimento entre Callinectes sapidus (Crustacea, Decapoda, Portunidae coletados em campo e mantidos em condições contoladas Growth comparison between Callinectes sapidus (Crustacea, Decapoda, Portunidae collected on the field and maintained under controlled conditions

    Directory of Open Access Journals (Sweden)

    Marcos A. Rodrigues

    2008-09-01

    Full Text Available Devido à falta de estruturas rígidas para determinação de idade em crustáceos, métodos que se baseiam na determinação de idade através da distribuição da freqüência de comprimentos são comumente utilizados. Neste trabalho, foi comparado o crescimento do siri-azul, Callinectes sapidus Rathbun, 1896, em laboratório e a partir de indivíduos de campo. Os indivíduos de laboratório, após a coleta, tiveram seu crescimento acompanhado individualmente. A temperatura foi mantida constante (25±2°C e a salinidade a 20±5. Os indivíduos do campo foram coletados entre 2002 e 2004 em pontos pré-determinados no estuário da Laguna dos Patos, com rede de portas. A biometria, nos dois casos, constou da medida da largura da carapaça (LC mm. As estimativas das curvas de crescimento, segundo o modelo de Bertalanffy para os indivíduos de campo, foram obtidas pelo acompanhamento do deslocamento modal (MPA. O tamanho máximo de largura de carapaça utilizado foi mantido fixo em todas as análises (157,78 mm para fêmeas e 162,71 mm para machos. Para os indivíduos mantidos em laboratório, os parâmetros e a longevidade obtidos foram k=0,001/dia; t o=-1,53; longevidade de 3117 dias (8,5 anos para machos e k=0,002/dia; t o=-29,5; longevidade de 2795 dias para fêmeas (7,7 anos. Os parâmetros de crescimento e a longevidade estimados para os animais coletados em campo foram k=0,004/dia; t o=-4,23; 1267 dias (3,5 anos para machos e k=0,004/dia; t o=-3,71; 1260 dias (3,45 anos para fêmeas. Foram encontradas diferenças significativas entre animais de laboratório e de campo, sugerindo que a espécie responde de forma diferente ao ambiente em que está inserida.The absence of hard structures which register age on crustaceans requires the use of length-based methods for age determination, and modal progression analysis (MPA to estimate growth. In this paper, individual growth of the blue crab Callinectes sapidus Rathbun, 1896 was studied in the laboratory and in the field, and the growth curves estimated were compared. Crabs studied in the laboratory were obtained from field sampling and kept under controlled conditions (temperature = 25±2°C, and salinity = 20±5, on a water recirculating system. These animals were molt staged and measured (carapace width, taken from the last antherolateral spines in millimeters before and after molting. Crabs used for field growth analysis were collected between 2002 and 2004 in predetermined sampling sites by using otter-trawl and renfro nets. Bertalanffy growth model was used to estimate the growth parameters of the crabs. Maximum carapace lengths were used as the estimative of the asymptotic length (157.78 mm for females and 162.71 mm for males. Growth parameters obtained from laboratory experiments were k=0.001/day; t o=-1.53; longevity= 3117 days for males and k=0.002/day; t o=-29.55; longevity= 2795 days for females. Growth parameters and longevity estimates for the field collected animals were k=0.004/day; t o=-4.23; 1267 days for males and k=0.004/day; t o=-3.71; 1260 days for females. Significant difference was observed among laboratory and field crabs, suggesting a different growth rate accordingly to the surrounding environment.

  12. Distribuição espacial, sazonal e estrutura populacional do caranguejo Aratus pisonii (H. Milne Edwards (Crustacea, Decapoda, Sesarmidae do manguezal de Itacuruçá, Rio de Janeiro, Brasil Spatial and seasonal distribution and population structure of the crab Aratus pisonii (H. Milne Edwards (Crustacea, Decapoda, Sesarmidae in Itacuruçá mangrove, Rio de Janeiro, Brazil

    Directory of Open Access Journals (Sweden)

    Cristiane F. Nicolau

    2007-06-01

    Full Text Available Este trabalho teve por objetivo analisar a distribuição espacial e sazonal e a estrutura populacional do caranguejo arborícula Aratuspisonii (H. Milne Edwards, 1837. O trabalho foi realizado através de coletas mensais de junho de 2000 a maio de 2001, para estudo da estrutura populacional e coletas sazonais de janeiro a outubro de 2002 para o estudo da distribuição espacial e sazonal, dividiu-se o manguezal em três áreas. Para a distribuição espacial e sazonal foram capturados 694 indivíduos sendo 45% na área 1, 36% na área 2 e 19% na área 3. O número de indivíduos apresentou diferença significativa na distribuição espacial entre as áreas 2 e 3. Para o estudo da estrutura populacional foi capturado um total de 742 caranguejos, sendo 59% machos, 32,7% fêmeas e 8,3% fêmeas ovígeras. A razãosexual obtida foi de 1: 0,69 (macho:fêmea e a largura da carapaça variou de 9,6 a 25,0 mm em machos e de 5,5 a 24,9 mm em fêmeas. A distribuição da freqüência em classes de tamanho foi unimodal e os machos foram mais freqüentes entre as classes de 19,1 a 21,0 mm LC, enquanto as fêmeas entre 17,1 a 19,0 mm LC. A razão sexual ao longo de cada classe de tamanho demonstrou predominância de machos em quase todas as classes, exceto entre as classes de 5,1 a 7,0 e 7,1 a 9,0 mm de LC.This work was performed by monthly sampling from June 2000 to May 2001 for population structure studies and by seasonal sampling from January to October 2002 for space and seasonal distribution studies, dividing the mangrove in three different areas. On the space-seasonal distribution study, 694 crabs were caught, where 45% was captured in area 1,36% in area 2 and 19% in area 3. There were significant differences between the number of individuals between area 2 and 3. For the population structure study a total of 742 crabs were captured, being 59% male, 32.7% female and 8.3% ovigerous females. The sex ratio was 1:0.69 (male:female, and the carapace width ranged from 9.6 to 25.0 mm CW in males and from 5.5 to 24.9 mm CW in females. The size class distribution was unimodal and the males were more frequent between 19.1 to 21.0 mm CW, while females between 17.1 to 19 mm CW. The sex ratio along each size class showed the male predominance in almost all classes except between the classes of 5.1 to 7.0 and 7.1 to 9.0 mm CW.

  13. Revisão taxonômica dos camarões de água doce (Crustacea: Decapoda: Palaemonidae, Sergestidae da Amazônia Peruana Taxonomic revision of the freshwater shrimps (Crustacea: Decapoda: Palaemonidae, Sergestidae from the Peruvian Amazonia

    Directory of Open Access Journals (Sweden)

    Carmen Rosa García-Dávila

    2003-12-01

    Full Text Available Foi realizada uma revisão taxonômica das espécies de camarões de água doce da Amazônia peruana que abrangeu oito espécies da família Palaemonidae e uma espécie da família Sergestidae. São descritas duas novas espécies do gênero Pseudopalaemon e feitos os primeiros registros de Euryrhynchus amazoniensis Tiefenbacher, 1978, Macrobrachium jelskii Miers, 1877 e Palaemonetes ivonicus Holthuis, 1950 para o Peru. São fornecidos chave de identificação, dados distribucionais e ilustrações para as espécies estudadas.A taxonomic revision of eight species of freshwater shrimps of the family Palaemonidae and one of the family Sergestidae from the Peruvian Amazonia was made. Two new species of the genus Pseudopalaemon are described, and Euryrhynchus amazoniensis Tiefenbacher, 1978, Macrobrachium jelskii Miers, 1877 e Palaemonetes ivonicus Holthuis, 1950 are recorded from Peru for the first time. Key, distributional data and ilustrations for the species are presented

  14. Distribuição e abundância dos caranguejos Uca Leach (Crustacea, Decapoda, Ocypodidae na Baía de Guaratuba, Paraná, Brasil Distribution and abundance of fiddler crabs Uca Leach (Crustacea Decapoda Ocypodidae in Guaratuba Bay, Parana State, southern Brazil

    Directory of Open Access Journals (Sweden)

    Setuko Masunari

    2006-12-01

    Full Text Available Um estudo sobre distribuição espacial e abundância dos chama-marés Uca Leach, 1814 foi realizado na Baía de Guaratuba, Estado do Paraná. Foram coletados chama-marés de dez biótopos ao longo de um gradiente de salinidade de zero a 32 dentro da Baía de Guaratuba. Foram obtidas sete espécies, entre as quais, Uca mordax (Smith, 1870 que foi registrada somente em biótopos inundados por águas de baixas salinidades (de zero a 16. As demais espécies mostraram tolerância a uma ampla variação de salinidade, mas Uca maracoani (Latreille, 1802-1803 e Uca leptodactyla Rathbun, 1898 predominaram em águas mais salinas, de 14 a 32, enquanto U. burgersi Holthuis, 1967, Uca rapax (Smith, 1870, Uca thayeri Rathbun, 1900 e Uca uruguayensis Nobili, 1901 foram coletadas em mais de três biótopos e mostraram uma tendência ao eurihalismo, suportando salinidades de 4 a 32. Entretanto, outras características do substrato tais como porcentagem relativa de cascalho/areia/silte/argila, teor de matéria orgânica e presença de marismas, também, influenciaram a distribuição espacial destes caranguejos. U. leptodactyla foi registrada com densidade máxima de 240 ind.m-2, o mais alto valor conhecido.A study of the spatial distribution and abundance of fiddler crabs was carried out in Guaratuba Bay, Parana State, southern Brazil. Fiddler crabs were collected from 10 biotopes located along a salinity gradient from zero to 32 inside Guaratuba Bay (between 48°30'W-25°50'S and 48°45'W-25°54'S. Seven species were found, among which, Uca mordax (Smith, 1870 occurred only in biotopes inundated by low salinity water, from zero to 16. Remaining species tolerated wide range of salinity oscillation, but Uca maracoani (Latreille, 1802-1803 and Uca leptodactyla Rathbun, 1898 predominated in saltier waters, from 14 to 32, while U. burgersi Holthuis, 1967, Uca rapax (Smith, 1870, Uca thayeri Rathbun, 1900, and Uca uruguayensis Nobili, 1901 were collected in more than three biotopes and showed to be euryhaline: they tolerated salinities from 4 to 32. However, other soil characteristics such as pebble/sand/silt/clay balance, organic matter content and presence of seagrass also influenced the spatial distribution of these crabs. U. leptodactyla occurred with maximum density of 240 ind.m-2, a highest recorded value.

  15. Análisis de características morfométricas en cangrejos (Crustacea: Decapoda: Pseudothelphusidae usando métodos multivariados Análisis de características morfométricas en cangrejos (Crustacea: Decapoda: Pseudothelphusidae usando métodos multivariados

    Directory of Open Access Journals (Sweden)

    Campos Martha R.

    1989-09-01

    Full Text Available By using statistical methods, a way was explored of identifying taxonomically freshwater crabs. The results of a morphometrical analysis carried out only using undamaged sexually mature specimens of Neostrengeria macropa, Neostrengeria guenteri and the subspecies Hypolobocera bouvieri bouvieri are presented. Using multivariate statistical methods, 12 variables are found with discriminant power between the three species. The statistical data obtained are also useful for the classification of additional specimens, independent of sex, coming from the same watershed and belonging to one of the three species included in the present study. La aplicación de métodos estadísticos multivariados en el estudio de las características morfométricas de cangrejos adultos permitieron establecer la existencia de 12 variables que tienen poder discriminante entre las especies y que son independientes de la genitalia. El estudio se realizó con especímenes de Neostrengeria macropa, Neostrengeria guenteri e Hypolobocera bouvieri bouvieri. EI procedimiento constituye una alternativa a la identicación taxonómica actual la cual se basa esencialmente en la genitalia del macho.

  16. A new species of Temnocephala Blanchard (Platyhelminthes, Temnocephalida ectosymbiont on Trichodactylus fluviatilis Latreille (Crustacea, Decapoda, Trichodactylidae from southern Brazil Nova espécie de Temnocephala Blanchard ectosimbionte sobre Trichodactylus fluviatilis Latreille (Crustacea, Decapoda, Trichodactylidae da região Sul do Brasil

    Directory of Open Access Journals (Sweden)

    José F. R. Amato

    2006-09-01

    Full Text Available Temnocephala trapeziformis sp. nov., ectosymbiont on Trichodactylus fluviatilis Latreille, 1828 is described from the State of Rio Grande do Sul, southern Brazil. Sixty-eight crabs were examined, of which 61 (89.7 % were positive for this species of the genus Temnocephala Blanchard, 1849. Eggs, as well as adult and young specimens, were found on the pleural areas of the carapace, in the orbital cavities, and, usually, on the fourth pair of pereiopods. The temnocephalans were always devoid of body pigmentation, although they kept the red eye pigment, undiluted in specimens fixed by hot (90ºC phosphate buffered 10% formalin. The most distinctive characters of the new species are: 1 the shape and size of the cirrus and the characteristics of its introvert section; 2 the trapezoidal shape of the dorsolateral post-tentacular 'excretory' epidermal syncytial plates, with the nephridiopore in the lower inner corner of the plate; and 3 the number, size, and distribution of the rhabdite producing glands, as observed in very young specimens.Temnocephala trapeziformis sp. nov., ectosimbionte sobre Trichodactylus fluviatilis Latreille, 1828 é descrita para o Estado do Rio Grande do Sul, região sul do Brasil. Sessenta e oito caranguejos foram examinados, sendo que 61 (89,7 % estavam positivos para esta espécie do gênero Temnocephala Blanchard, 1849. Posturas estavam localizadas, sobre as pleuras da carapaça, nas cavidades orbitais e no quarto par de pereiópodos, locais onde também foram encontrados espécimes jovens e adultos. Os temnocefalídeos sempre se apresentaram sem pigmento corporal, embora o pigmento vermelho dos olhos tenha sido preservado nos espécimes fixados em formalina 10% fosfato tamponada (90ºC. Os caracteres mais distintos da nova espécie são: 1 a forma e o tamanho do cirro e as características do 'introvert', 2 as placas sinciciais 'excretoras' trapeziformes, com o nefridióporo sempre deslocado para o canto inferior interno de cada placa, e 3 o número, o tamanho e a distribuição das glândulas produtoras de rabdites, observadas em espécimes muito jovens.

  17. Temnocephala lutzi Monticelli (Platyhelminthes, Temnocephalida ectosymbiont on two species of Trichodactylus Latreille (Crustacea, Decapoda, Trichodactylidae from southern Brazil Temnocephala lutzi Monticelli (Platyhelminthes, Temnocephalida ectosimbionte sobre duas espécies de Trichodactylus Latreille (Crustacea, Decapoda, Trichodactylidae da região sul do Brasil

    Directory of Open Access Journals (Sweden)

    José F. R. Amato

    2005-12-01

    Full Text Available Temnocephala lutzi Monticelli, 1913, ectosymbiont on brachyuran freshwater crabs of the genus Trichodactylus Latreille, 1828 is recorded for the first time in the State of Rio Grande do Sul, southern Brazil. Two hundred and seventy-nine crabs of two species were examined: 211 Trichodactylus panoplus (von Martens, 1869 and 68 Trichodactylus fluviatilis Latreille, 1828 of which 51 (24.17% and 28 (41.17% were positive for T. lutzi, respectively. Crabs of both species carried eggs fixed, exclusively, on the floor of the branchial chambers and/or on the lower side of the gills. Adult as well as young specimens were found inside and outside the branchial chambers. The temnocephalans were always devoid of body pigmentation, although they kept the red eye pigment undiluted in specimens fixed by formalin. The cirrus of T. lutzi showed the typical shape for the species, while the dorsolateral, post tentacular 'excretory' syncytial plates, demonstrated by two special techniques (silver nitrate staining and SEM, appeared with an elliptical shape and a central nephridiopore.Temnocephala lutzi Monticelli, 1913, ectosimbionte sobre caranguejos braquiúros de água doce do gênero Trichodactylus Latreille, 1828, é assinalada pela primeira vez no Estado do Rio Grande do Sul, região sul do Brasil. Duzentos e setenta e nove caranguejos foram examinados: 211 de Trichodactylus panoplus (von Martens, 1869 e 68 de Trichodactylus fluviatilis Latreille, 1828, dos quais 51 (24,17% e 28 (41,17% estavam positivos para T. lutzi, respectivamente. Caranguejos das duas espécies apresentaram posturas de T. lutzi com os ovos fixados, exclusivamente, no interior das câmaras branquiais, sobre o assoalho e/ou na face interna das brânquias. Espécimes juvenis e adultos foram encontrados dentro e fora das câmaras branquiais. Os temnocefalídeos sempre se apresentaram sem pigmento corporal, embora o pigmento vermelho dos olhos tenha sido preservado nos espécimes fixados em formalina. Os cirros em T. lutzi apresentaram-se com a forma típica da espécie, as placas sinciciais dorsolaterais, pós-tentaculares 'excretoras', demonstradas através de duas técnicas especiais (nitrato de prata e MEV, apresentaram a forma elíptica com o nefridióporo central.

  18. Contenido de metales en Cancer polyodon (Crustacea: Decapoda en un sistema de bahías del norte de Chile (27°S Metal contents in Cancer polyodon (Crustacea: Decapoda in a bay system of northern Chile (27°S

    Directory of Open Access Journals (Sweden)

    Alexis Castillo

    2011-11-01

    Full Text Available El contenido de Zn, Cu, Cd, Pb, Fe, Al y Ni fue analizado en tejido muscular de Cancer polyodon en las bahías de Caldera, Calderilla, Inglesa y Salada (Atacama, Chile. Los resultados fueron comparados con estudios similares desarrollados por otros autores y la normativa de carácter nacional e internacional relacionada con el contenido de metales pesados en crustáceos para consumo humano. El orden de abundancia de los metales analizados en C. polyodon fue CdThe contents of Zn, Cu, Cd, Pb, Fe, Al and Ni in the muscle tissue of Cancer polyodon from Caldera, Calderilla, Inglesa, and Salada bays (Atacama, Chile were quantified. The results were compared with similar studies by other authors and with the national and international regulatory standards for heavy metal contents in crustaceans for human consumption. In increasing order, the metal contents in C. polyodon were: Cd< Ni< Cu< Pb< Zn

  19. Maturidade sexual das fêmeas de Callinectes danae (Crustacea, Decapoda, Portunidae nos estuários dos rios Botafogo e Carrapicho, Itamaracá, PE, Brasil Sexual maturity of females of Callinectes danae (Crustacea, Decapoda, Portunidae in the estuaries of the Botafogo and Carrapicho rivers, Itamaracá, PE, Brazil

    Directory of Open Access Journals (Sweden)

    Aline do Vale Barreto

    2006-06-01

    Full Text Available Callinectes danae (Smith, 1869, siri-azul, constitui um importante recurso pesqueiro nos estuários dos rios Botafogo e Carrapicho. O objetivo do presente estudo foi estimar a maturidade sexual das fêmeas de C. danae. Os espécimes foram capturados, entre outubro de 2003 a junho de 2004, com auxílio de um barco de pesca equipado com rede de arrasto do tipo "wing-trawl" e arrastados durante 5 minutos. No laboratório, os siris foram contados, numerados, sexados, pesados e mensurados. A largura da carapaça (LC foi medida na base do espinho lateral e a largura do abdome (LA mensurada na altura da articulação do quinto esternito abdominal. Um total de 596 fêmeas de C. danae foram analisadas: 417 (69,97% no rio Botafogo e 179 (30,03% no Carrapicho; as fêmeas não-ovígeras apresentaram LC de 18,38 a 101 mm (59,14 ± 13,65 mm e 26,70 a 83,48 mm (59,16 ± 13,77 mm, nos respectivos rios; a LC de fêmeas ovígeras foi de 57,04 a 83,30 mm (67,68 ± 6,56 mm. As médias de larguras das carapaças não apresentaram diferenças estatisticamente significativas O conhecimento da maturidade sexual das fêmeas de Callinectes danae é de grande importância para o seu manejo e conservação. O L50 gonadal foi estimado em 63,58 mm (chi2 = 140,47; g.l. = 1; p Callinectes danae (Smith, 1869 is an important fishery resource in the Botafogo and Carrapicho river estuaries. The aim of this study was to estimate the sexual maturity of C. danae. Specimens were captured between October 2003 and June 2004 with the aid of a fishing boat equipped with a wing-trawl and trawling took place during 5 minutes each time. In the laboratory, the crabs were counted, numbered, sexed, weighed, and measured. The carapace width (CW was measured at the base of the lateral spine and the abdomen width (AW was measured at the point of the articulation of the fifth abdominal esternite. A total of 596 females of C. danae were analyzed: 417 (69.97% from Botafogo River and 179 (30.03% from Carrapicho River; no ovigerous females had CW between 18.38 and 101 mm (59.14 ± 13.65 mm and 26.70 and 83.48 mm (59.16 ± 13.77 mm, in the respective rivers; the CW of ovigerous females ranged from 57.04 to 83.30 mm (67.68 ± 6.56 mm. The average carapace widths were not significantly different statistically in both estuaries. The knowledge of sexual maturity of C. danae is extremely important for its management and conservation. The gonadal L50 was estimated in 63.58 mm (chi2 = 140.47; df = 1; p < 0.01 and 61.59 mm (chi2 = 90.94; df = 1; p < 0.01 for the estuaries of the Botafogo and Carrapicho rivers, respectively. The morphological L50 was 57.13 mm (chi2 = 484.51; df = 1; p < 0.01 for the Botafogo River and 56.46 mm (chi2= 257.82; df = 1; p < 0.01 for the Carrapicho River. In both estuaries, the morphological maturity of C. danae females occurred before gonadal maturity; thus, to guarantee that this species be managed successfully, fishing must only be allowed for specimens with carapace width over 65 mm.

  20. Spatio-temporal variation of the pink shrimp Farfantepenaeus paulensis (Crustacea, Decapoda, Penaeidae associated to the seasonal overture of the sandbar in a subtropical lagoon Variação espaço-temporal do camarão rosa Farfantepenaeus paulensis (Crustacea, Decapoda, Penaeidae associado à abertura sazonal da barra de conexão com o mar em uma lagoa subtropical

    Directory of Open Access Journals (Sweden)

    Nicolle C Ferreira

    2009-12-01

    Full Text Available On the southern Brazilian coast, the penaeid pink shrimp Farfantepenaeus paulensis (Pérez-Farfante, 1967 is intensively captured by both artisanal and industrial fisheries. In the Ibiraquera Lagoon, artisanal fishing of juvenile stocks has declined sharply over the last 15 years. The traditional management methods used by fishermen are no longer sustainable due to conflicts with the demands of tourism and weak environmental and public agencies. The dynamics of the timing of the artificial opening and natural reformation of a sandbar across the mouth of the lagoon are regarded as a central socio-ecological problem. We evaluated the abundance and biomass variation of F. paulensis throughout the year and along a spatial gradient measured from the sandbar into the lagoon. We also explored the influence of opening the sandbar on the shrimp population. Samples were collected monthly from February 2004 to February 2005, using a 27 mm mesh cast net, in four different areas, with three sites being sampled per area. Small numbers of large shrimps were captured in the upper area, while greater biomass and abundance of small shrimps were observed near the sandbar, suggesting the role of the inner area as a refuge for growing. The highest records for biomass and abundance were recorded during warm months, regardless if the lagoon was open or closed by the sandbar. The Ibiraquera Lagoon could be more productive for fishermen if the sandbar opening was coincident to the period of natural post-larvae influx. Furthermore, coastal stocks could be improved by opening the sandbar again during summer in conjunction with fishing quotas.O camarão rosa Farfantepenaeus paulensis (Pérez-Farfante, 1967 é intensivamente capturado, tanto pela frota pesqueira industrial quanto artesanal na costa sul brasileira. Na Lagoa de Ibiraquera (SC, a captura artesanal de camarões tem diminuído gradativamente nos últimos 15 anos. Os métodos de gestão tradicionais utilizados pelos pescadores não são mais eficientes devido aos conflitos com o turismo e a gestão pública e ambiental. A dinâmica de abertura artificial e reestruturação natural do banco de areia no canal de contato da lagoa com o mar é considerada um problema socio-ecológico central no local. Neste estudo foi avaliada a variação na biomassa e abundância do F. paulensis ao longo do ano e em um gradiente espacial a partir do canal da barra e até o interior da lagoa. Foram realizadas coletas mensais de fevereiro de 2004 a fevereiro de 2005 com tarrafa de 27 mm de malha nas quatro lagoas que compõe a Lagoa de Ibiraquera, em três pontos em cada lagoa. Um número pequeno de grandes camarões foi significativamente (p < 0,05 capturado na área mais interna da lagoa, enquanto que maior biomassa e abundância de pequenos camarões foram observadas significativamente (p < 0,05 próximas à barra. Esses resultados sugerem que as áreas mais internas da lagoa funcionam como refúgio para o crescimento das espécies e mostram o papel do canal na migração dos camarões para dentro da lagoa. Os valores de biomassa e abundância foram significativamente (p < 0,05 maiores nos meses mais quentes, independentemente da barra estar aberta ou fechada. O estoque de camarão poderia aumentar caso houvesse uma abertura da barra durante o período natural de entrada de pós-larvas. Além disso, a abertura da barra durante o verão, associada a medidas de conservação das águas do canal da barra, pode implementar os estoques costeiros.

  1. Detection of irradiation treatment in crustacea by electron spin resonance (ESR) spectroscopy

    Energy Technology Data Exchange (ETDEWEB)

    Stewart, E.M. [Queen`s Univ., Belfast, Northern Ireland (United Kingdom). Dept. of Food Science; Stevenson, M.H. [Queen`s Univ., Belfast, Northern Ireland (United Kingdom). Dept. of Food Science]|[Department of Agriculture for Northern Ireland, Belfast (United Kingdom); Gray, R. [Department of Agriculture for Northern Ireland, Belfast (United Kingdom)

    1996-12-31

    When the Food (Control of Irradiation) Regulations 1990 came into force in the United Kingdom in January 1991 they included provision for the irradiation of Crustacea to an overall average dose of 3 kGy. The treatment of Crustacea with ionising radiation would reduce numbers of potential pathogens and spoilage organisms thus giving a microbiologically safer product with a longer shelf-life at chill temperatures. At present the process is being used in countries such as France and The Netherlands for the decontamination/shelf-life extension of shrimp. Therefore, as for other food products such as poultry, liquid whole egg and fruit, which are also treated with ionising radiation, it is desirable that a suitable test should be available to help in the control of the irradiation process. One such detection method which has been applied to irradiated Crustacea is that of electron spin resonance (ESR) spectroscopy due to the fact that the rigid exoskeleton has a relatively high dry matter so free radicals produced by ionising irradiation can be trapped and are, therefore, sufficiently stable to be detected. (author).

  2. Detection of irradiation treatment in crustacea by electron spin resonance (ESR) spectroscopy

    International Nuclear Information System (INIS)

    Stewart, E.M.; Gray, R.

    1996-01-01

    When the Food (Control of Irradiation) Regulations 1990 came into force in the United Kingdom in January 1991 they included provision for the irradiation of Crustacea to an overall average dose of 3 kGy. The treatment of Crustacea with ionising radiation would reduce numbers of potential pathogens and spoilage organisms thus giving a microbiologically safer product with a longer shelf-life at chill temperatures. At present the process is being used in countries such as France and The Netherlands for the decontamination/shelf-life extension of shrimp. Therefore, as for other food products such as poultry, liquid whole egg and fruit, which are also treated with ionising radiation, it is desirable that a suitable test should be available to help in the control of the irradiation process. One such detection method which has been applied to irradiated Crustacea is that of electron spin resonance (ESR) spectroscopy due to the fact that the rigid exoskeleton has a relatively high dry matter so free radicals produced by ionising irradiation can be trapped and are, therefore, sufficiently stable to be detected. (author)

  3. Macroepizoísmo em Libinia ferreirae (Crustacea, Brachyura, Majidae Macroepizoites on Libinia ferreirae (Crustacea, Brachyura, Majidae

    Directory of Open Access Journals (Sweden)

    Vanessa C. Winter

    2006-06-01

    Full Text Available Um estudo de distribuição dos macroepizóicos foi realizado numa população do caranguejo-aranha Libinia ferreirae Brito Capello, 1871 proveniente do litoral dos estados do Paraná e de Santa Catarina. O material biológico foi obtido junto aos pescadores, e faz parte do rejeito de pesca. Os caranguejos foram mensurados e os macroepizóicos identificados e contados. Os seguintes macroepizóicos sésseis foram registrados: Calliactis tricolor (Lesueur, 1817 (Cnidaria; Actiniaria (Cnidaria; Arca sp. (Mollusca; Ostreidae (Mollusca; Acanthodesia tenuis (Desor, 1848 (Bryozoa; Cirripedia e duas espécies tubícolas de Gammaridea (Crustacea. Além destes organismos ocorreram dois tubos desabitados e quatro animais vágeis. A anêmona C. tricolor foi a espécie mais abundante e freqüente, sendo, provavelmente, utilizada como mecanismo de camuflagem pelo caranguejo. O macroepizoísmo em L. ferreirae está relacionado com a idade ou tamanho do caranguejo, tendo maior incidência naqueles mais velhos ou de maior porte. Entretanto, a densidade dos macroepizóicos por caranguejo se mantém em torno de três. Não há relação entre o macroepizoísmo e o sexo do hospedeiro; somente fêmeas ovígeras utilizam desse recurso mais freqüentemente do que as não-ovígeras. Devido à maior área de fixação, os macroepizóicos colonizam principalmente a carapaça do caranguejo, enquanto nos pereiópodos há predominância de Bryozoa.A study of the distribution of the macroepizoites was carried out on a population of the spider crab Libinia ferreirae Brito Capello, 1871 from the Southern Brazilian coast. Crabs were obtained from shrimps and fishes by-catch. They were measured, and their macroepizoites were identified and counted. The following sessile macroepizoites were registered: Calliactis tricolor (Lesueur, 1817 (Cnidaria; Actiniaria (Cnidaria; Arca sp. (Mollusca; Ostreidae (Mollusca; Acanthodesia tenuis (Desor, 1848 (Bryozoa; Cirripedia and two species

  4. Inshore small-mesh trawling survey of the Cape south coast. Part 5 ...

    African Journals Online (AJOL)

    Inshore small-mesh trawling survey of the Cape south coast. Part 5. Crustacea, Stomatopoda, Isopoda and. Decapoda. B. Kensley and C.D. Buxton. Port Elizabeth Museum, Port Elizabeth. Forty-six species of Crustacea from the shallow marine waters of the southern Cape coast are listed. Five new records for the area.

  5. Assessment of Pneumatic Balloon Dilation in Patients with Symptomatic Relapse after Failed Heller Myotomy: A Single Center Experience.

    Science.gov (United States)

    Amani, Mohammad; Fazlollahi, Narges; Shirani, Shapour; Malekzadeh, Reza; Mikaeli, Javad

    2016-01-01

    BACKGROUND Although Heller myotomy is one of the most effective treatments for achalasia, it may be associated with early or late symptom relapse in some patients. Therefore, additional treatment is required to achieve better control of symptoms. To evaluate the safety and efficacy of pneumatic balloon dilation (PBD) in patients with symptom relapse after Heller myotomy. METHODS Thirty six post-myotomy patients were evaluated from 1993 to 2013. Six patients were excluded from the analysis because of comorbid diseases or epiphrenic diverticula. Thirty patients were treated with PBD. Primary outcome was defined as a decrease in symptom score to 4 or less and a reduction greater than 80% from the baseline in the volume of barium in timed barium esophagogram in 6 weeks. Achalasia symptom score (ASS) was assessed at 1.5, 3, 6, and 12 months after treatment and then every six months in all patients and PBD was repeated in case of symptom relapse (ASS>4). RESULTS The mean age of the patients was 45.5±13.9 years (range: 21-73). Primary outcome was observed in 25 patients (83%). The mean ASS of the patients dropped from 7.8 before treatment to 1.3±2.0 at 1.5 months after treatment (p=0.0001). The mean volume and height of barium decreased from 43.1±33.4 and 7.1±4.7 to 6.0±17.1 and 1.1±2.2, respectively (p=0.003, p=0.003). The mean duration of follow-up was 11.8±6.3 years. At the end of the study, 21 patients (70%) reported sustained good response. No major complications such as perforation or gross bleeding were seen. CONCLUSION PBD is an effective and safe treatment option for achalasia in patients with symptom relapse after Heller myotomy.

  6. Laparoscopic Heller Myotomy versus Per Oral Endoscopic Myotomy: Evidence-Based Approach to the Treatment of Esophageal Achalasia.

    Science.gov (United States)

    Schlottmann, Francisco; Patti, Marco G

    2018-04-01

    Esophageal achalasia is a rare disorder characterized by a failure of the lower esophageal sphincter to relax during swallowing, combined with aperistalsis of the esophageal body. Treatment is not curative, but aims to eliminate the outflow resistance caused by the nonrelaxing lower esophageal sphincter. Current evidence suggests that both laparoscopic Heller myotomy and per oral endoscopic myotomy (POEM) are very effective in the relief of symptoms in patients with achalasia. Specifically, for type III achalasia, POEM may achieve higher success rates. However, POEM is associated to a very high incidence of pathologic reflux, with the risk of exchanging one disease-achalasia-with another-gastroesophageal reflux.

  7. How does the robot affect outcomes? A retrospective review of open, laparoscopic, and robotic Heller myotomy for achalasia.

    Science.gov (United States)

    Shaligram, Abhijit; Unnirevi, Jayaraj; Simorov, Anton; Kothari, Vishal M; Oleynikov, Dmitry

    2012-04-01

    Robotic techniques are routinely used in urological and gynecological procedures; however, their role in general surgical procedures is limited. A robotic technique has been successfully adopted for a minimally invasive Heller myotomy procedure for achalasia. This study aims to compare perioperative outcomes following open, laparoscopic, and robotic Heller myotomy. This study is a multicenter, retrospective analysis utilizing a large administrative database. The University Health System Consortium (UHC) is an alliance between academic medical centers and affiliate hospitals. The UHC database was accessed using International Classification of Diseases, Ninth Revision, Clinical Modification codes and analyzed. 2,683 patients with achalasia underwent Heller myotomy between October 2007 and June 2011. Myotomy was performed by open surgery (OM) in 418 patients, by laparoscopic approach (LM) in 2,116, and by robotic approach (RM) in 149. Comparison between LM and RM groups demonstrated no significant difference in mortality (0.14 vs. 0.0%; P = 1), morbidity (5.19 vs. 4.02%; P = 0.7), intensive care unit (ICU) admission (6.62 vs. 3.36%; P = 0.12), length of stay (LOS) (2.70 ± 3.87 days vs. 2.42 ± 2.69 days; P = 0.34), or 30-day readmission (1.41 vs. 2.84%; P = 0.27). However, hospital costs were significantly lower for the LM group (US $7,441 ± 7,897 vs. US $9,415 ± 5,515; P = 0.0028). Comparison between OM and RM demonstrated significant lower morbidity (9.08 vs. 4.02%; P = 0.02), ICU admission rate (14.01 vs. 3.36%, P = 0.0002), and LOS (4.42 ± 5.25 days vs. 2.42 ± 2.69 days; P = 0.0001). The perioperative outcomes are superior in LM and RM groups when compared with OM. The outcomes for the LM and RM group are comparable, with the robotic group having slightly improved results, although with increased costs. We conclude that robotic surgery is equivalent in safety and efficacy to laparoscopic Heller myotomy, and feel that the increased cost should come down as

  8. Outcome of Peroral Endoscopic Myotomy (POEM) for Treating Achalasia Compared With Laparoscopic Heller Myotomy (LHM).

    Science.gov (United States)

    Peng, Lijun; Tian, Shuni; Du, Chao; Yuan, Ziying; Guo, Mingxiao; Lu, Lin

    2017-02-01

    Peroral endoscopic myotomy (POEM) is an emerging endoscopic treatment for achalasia and the long-term efficacy of POEM remains to be evaluated. This study compared the outcomes of POEM with that of the standard laparoscopic Heller myotomy (LHM) for achalasia. Achalasia patients treated by POEM or LHM were retrospectively analyzed, with a minimum postoperative follow-up of 3 years. Perioperative outcomes and long-term outcomes including treatment success (Eckardt score ≤3), occurrence of gastroesophageal reflux disease (GERD) (GerdQ score ≥9) and quality of life (36-item short form) were compared. Thirteen patients who underwent POEM were compared with 18 patients who received LHM. These patients were similar in age, sex, symptoms duration, Eckardt score, and previous therapy (all P>0.05). Mean myotomy lengths were similar (P=0.73). Operation time was shorter in the POEM group (P=0.001). One patient (7.7%) developed pneumothorax after POEM and 1 patient (5.6%) experienced postoperative infection after LHM (P=1.00). Treatment success was achieved in 83.3% (9/12) of POEM patients and 80.0% (12/15) of LHM patients (P=1.00). Both POEM and LHM significantly reduced Eckardt score (both P=0.00). GERD rate was similar (8.3% vs. 6.7%, P=1.00). There was no difference in all aspects of quality of life between the 2 groups. Long-term outcomes indicate that POEM is an effective treatment that is comparable with LHM. More data of randomized trials comparing POEM with LHM will enrich the existing evidence.

  9. Laparoscopic Heller Myotomy vs Per Oral Endoscopic Myotomy: Patient-Reported Outcomes at a Single Institution.

    Science.gov (United States)

    Hanna, Andrew N; Datta, Jashodeep; Ginzberg, Sara; Dasher, Kevin; Ginsberg, Gregory G; Dempsey, Daniel T

    2018-04-01

    Although laparoscopic Heller myotomy (LHM) has been the standard of care for achalasia, per oral endoscopic myotomy (POEM) has gained popularity as a viable alternative. This retrospective study aimed to compare patient-reported outcomes between LHM and POEM in a consecutive series of achalasia patients with more than 1 year of follow-up. We reviewed demographic and procedure-related data for patients who underwent either LHM or POEM for achalasia between January 2011 and May 2016. Phone interviews were conducted assessing post-procedure achalasia symptoms via the Eckardt score and achalasia severity questionnaire (ASQ). Demographics, disease factors, and survey results were compared between LHM and POEM patients using univariate analysis. Significant predictors of procedure failure were analyzed using univariate and multivariate analysis. There were no serious complications in 110 consecutive patients who underwent LHM or POEM during the study period, and 96 (87%) patients completed phone surveys. There was a nonsignificant trend toward better patient-reported outcomes with POEM. There were significant differences in patient characteristics including sex, achalasia type, mean residual lower esophageal pressure (rLESP), and follow-up time. The only univariate predictors of an unsatisfactory Eckardt score or ASQ were longer follow-up and lower rLESP, with follow-up length being the only predictor on multivariate analysis. There were significant demographic and clinical differences in patient selection for POEM vs LHM in our group. Although the 2 procedures have similar patient-reported effectiveness, subjective outcomes seem to decline as a result of time rather than procedure type. Copyright © 2018 American College of Surgeons. Published by Elsevier Inc. All rights reserved.

  10. Comparison of esophagogastric junction distensibility changes during POEM and Heller myotomy using intraoperative FLIP.

    Science.gov (United States)

    Teitelbaum, Ezra N; Boris, Lubomyr; Arafat, Fahd O; Nicodème, Frédéric; Lin, Zhiyue; Kahrilas, Peter J; Pandolfino, John E; Soper, Nathaniel J; Hungness, Eric S

    2013-12-01

    Peroral endoscopic myotomy (POEM) is a novel endoscopic surgical procedure for the treatment of achalasia. The comparative effects of POEM and laparoscopic Heller myotomy (LHM) on esophagogastric junction (EGJ) physiology are unknown. A novel measurement catheter, the functional lumen imaging probe (FLIP), allows for intraoperative evaluation of EGJ compliance by measuring luminal geometry and pressure during volume-controlled distensions. Distensibility index (DI) (defined as the minimum cross-sectional area at the EGJ divided by pressure) was measured with FLIP intraoperatively in patients undergoing LHM and POEM. Separate measurements were taken after each operative step. During LHM, measurements were performed after: (1) induction of anesthesia, (2) insufflation of pneumoperitoneum, (3) hiatal dissection and esophageal mobilization, (4) myotomy, (5) partial fundoplication, and (6) deinsufflation. During POEM, they were performed after: (1) induction of anesthesia, (2) submucosal tunnel creation, and (3) myotomy. Eleven LHM and 14 POEM patients underwent intraoperative FLIP. Baseline DI was similar between groups. LHM resulted in an overall increase in mean DI (pre 1.4 vs. post 7.6 mm(2)/mmHg, using a 40-ml distension volume; p Myotomy caused an increase in DI. Partial fundoplication (6 Toupet, 5 Dor) caused a decrease in DI, and deinsufflation caused an increase in DI. POEM also resulted in an overall increase in mean DI (pre 1.4 vs. post 7.9 mm(2)/mmHg; p myotomy caused increases in DI. When overall changes were compared, there were no differences in the amount of DI increase between LHM and POEM. POEM and LHM result in a similar improvement in EGJ distensibility intraoperatively. Further study is needed to correlate intraoperative FLIP measurements with postoperative symptomatic and physiologic outcomes.

  11. Esophagogastric junction distensibility measurements during Heller myotomy and POEM for achalasia predict postoperative symptomatic outcomes

    Science.gov (United States)

    Teitelbaum, Ezra N.; Soper, Nathaniel J.; Pandolfino, John E.; Kahrilas, Peter J.; Hirano, Ikuo; Boris, Lubomyr; Nicodème, Frédéric; Lin, Zhiyue; Hungness, Eric S.

    2015-01-01

    Background The functional lumen imaging probe (FLIP) is a novel diagnostic tool that can be used to measure esophagogastric junction (EGJ) distensibility. In this study we performed intraoperative FLIP measurements during laparoscopic Heller myotomy (LHM) and peroral esophageal myotomy (POEM) for treatment of achalasia and evaluated the relationship between EGJ distensibility and postoperative symptoms. Methods Distensibility index (DI) (defined as the minimum cross-sectional area at the EGJ divided by distensive pressure) was measured with FLIP at two time points during LHM and POEM: 1) at baseline after induction of anesthesia, and 2) after operation completion. Results Measurements were performed in 20 patients undergoing LHM and 36 undergoing POEM. Both operations resulted in an increase in DI, although this increase was larger with POEM (7±3.1 vs. 5.1±3.4mm2/mmHg, p3mm2/mmHg. When all patients were divided into thirds based on final DI, none in the lowest DI group (7), as compared with 20% in the middle third (6–9mm2/mmHg) and 36% in the highest third (>9mm2/mmHg). Patients within an “ideal” final DI range (4.5–8.5 mm2/mmHg) had optimal symptomatic outcomes (i.e. Eckardt≤1 and GerdQ≤7) in 88% of cases, compared with 47% in those with a final DI above or below that range (p<.05). Conclusions Intraoperative EGJ distensibility measurements with FLIP were predictive of postoperative symptomatic outcomes. These results provide initial evidence that FLIP has the potential to act as a useful calibration tool during operations for achalasia. PMID:25055891

  12. Mucosal Perforation During Laparoscopic Heller Myotomy Has No Influence on Final Treatment Outcome.

    Science.gov (United States)

    Salvador, Renato; Spadotto, Lorenzo; Capovilla, Giovanni; Voltarel, Guerrino; Pesenti, Elisa; Longo, Cristina; Cavallin, Francesco; Nicoletti, Loredana; Ruol, Alberto; Valmasoni, Michele; Merigliano, Stefano; Costantini, Mario

    2016-12-01

    The aims of the study were (a) to examine the final outcome in patients experiencing accidental mucosal perforation during laparoscopic Heller myotomy with Dor fundoplication (LHD) and (b) to evaluate whether perforation episodes might influence the way in which surgeons subsequently approached the LHD procedure. We studied all consecutive patients that underwent LHD between 1992 and 2015. Patients were divided into two main groups: those who experienced an intraoperative mucosal perforation (group P) and those whose LHD was uneventful (group NP). Two additional groups were compared: group A, which consisted of patients operated by a given surgeon immediately before a perforation episode occurred, and group B, which included those operated immediately afterwards. Eight hundred seventy-five patients underwent LHD; a mucosal perforation was detected in 25 patients (2.9 %), which was found unrelated to patients' symptom's score and age, radiological stage, manometric pattern, or the surgeon's experience. The median postoperative symptom score was similar for the two groups as the failure rate: 92 failures in group NP (10.8 %) and 4 in group P (16 %) (p = 0.34); moreover, symptoms recurred in 2 patients of group A (10 %) and 3 patients of group B (15 %) (p = 0.9). Accidental perforation during LHD is infrequent and impossible to predict on the grounds of preoperative therapy or the surgeon's personal experience. Despite a longer surgical procedure and hospital stay, the outcome of LHD is much the same as for patients undergoing uneventful myotomy. A recent mucosal perforation does not influence the surgeon's subsequent performance.

  13. Efficacy and Safety of Peroral Endoscopic Myotomy for Treatment of Achalasia After Failed Heller Myotomy.

    Science.gov (United States)

    Ngamruengphong, Saowanee; Inoue, Haruhiro; Ujiki, Michael B; Patel, Lava Y; Bapaye, Amol; Desai, Pankaj N; Dorwat, Shivangi; Nakamura, Jun; Hata, Yoshitaka; Balassone, Valerio; Onimaru, Manabu; Ponchon, Thierry; Pioche, Mathieu; Roman, Sabine; Rivory, Jérôme; Mion, François; Garros, Aurélien; Draganov, Peter V; Perbtani, Yaseen; Abbas, Ali; Pannu, Davinderbir; Yang, Dennis; Perretta, Silvana; Romanelli, John; Desilets, David; Hayee, Bu; Haji, Amyn; Hajiyeva, Gulara; Ismail, Amr; Chen, Yen-I; Bukhari, Majidah; Haito-Chavez, Yamile; Kumbhari, Vivek; Saxena, Payal; Talbot, Michael; Chiu, Philip Wai-Yan; Yip, Hon-Chi; Wong, Vivien Wai-Yin; Hernaez, Ruben; Maselli, Roberta; Repici, Alessandro; Khashab, Mouen A

    2017-10-01

    In patients with persistent symptoms after Heller myotomy (HM), treatment options include repeat HM, pneumatic dilation, or peroral endoscopic myotomy (POEM). We evaluated the efficacy and safety of POEM in patients with achalasia with prior HM vs without prior HM. We conducted a retrospective cohort study of 180 patients with achalasia who underwent POEM at 13 tertiary centers worldwide, from December 2009 through September 2015. Patients were divided into 2 groups: those with prior HM (HM group, exposure; n = 90) and those without prior HM (non-HM group; n = 90). Clinical response was defined by a decrease in Eckardt scores to 3 or less. Adverse events were graded according to criteria set by the American Society for Gastrointestinal Endoscopy. Technical success, clinical success, and rates of adverse events were compared between groups. Patients were followed up for a median of 8.5 months. POEM was technically successful in 98% of patients in the HM group and in 100% of patients in the non-HM group (P = .49). A significantly lower proportion of patients in the HM group had a clinical response to POEM (81%) than in the non-HM group (94%; P = .01). There were no significant differences in rates of adverse events between the groups (8% in the HM group vs 13% in the non-HM group; P = .23). Symptomatic reflux and reflux esophagitis after POEM were comparable between groups. POEM is safe and effective for patients with achalasia who were not treated successfully by prior HM. Although the rate of clinical success in patients with prior HM is lower than in those without prior HM, the safety profile of POEM is comparable between groups. Copyright © 2017 AGA Institute. Published by Elsevier Inc. All rights reserved.

  14. Is Heller myotomy better than balloon dilation? A meta-analysis.

    Science.gov (United States)

    Illés, Anita; Farkas, Nelli; Hegyi, Péter; Garami, András; Szabó, Imre; Solymár, Margit; Pétervári, Erika; Balaskó, Márta; Pár, Gabriella; Sarlós, Patrícia; Bajor, Judit; Szűcs, Ákos; Czimmer, József; Szemes, Kata; Vincze, Áron

    2017-06-01

    Endoscopic balloon dilation (EBD) and laparoscopic Heller myotomy (LHM) are the most commonly performed treatment options for achalasia. Decision between these treatment options is difficult. The aim of this meta-analysis was to evaluate the efficacy of EBD compared to LHM. The electronic databases PubMed, Embase and Cochrane Controlled Trials Registry were systematically searched for the period between January 1, 1976 and December 31, 2015. Meta-analysis was performed using the PICOS (problem, intervention, comparison, outcome, study design) format. Efficacy and safety of EBD were compared to LHM. Forest plot analyses were used to illustrate the success rate, perforation rate and post-procedural gastroesophageal reflux. Using the search strategy, eight studies met the selection criteria and were included in the meta-analysis. The total number of patients included was 749 (360 in the EBD group and 389 in the LHM group). The success rate was lower in the EBD group than in the LHM group (OR=0.486; CI: 0.304-0.779; p=0.003). The rate of perforation did not differ significantly between the EBD and LHM group (RR= 0.635, CI: 0.340-1.186, p=0.154). The incidence of post-procedural symptomatic gastroesophageal reflux did not differ between the two treatment groups (RR=0.663, CI: 0.328-1.343, p=0.254). Our data suggest that the efficacy of LHM is superior to that of EBD, while there is no difference in safety between the two treatment groups.

  15. [Laparoscopic Heller myotomy after failed POEM and multiple balloon dilatations : Better late than never].

    Science.gov (United States)

    Giulini, L; Dubecz, A; Stein, H J

    2017-04-01

    Despite the lack of long-term results, peroral endoscopic myotomy (POEM) has been increasingly propagated as a feasible alternative to pneumatic balloon dilatation (BD) and laparoscopic Heller myotomy (LHM) in patients with achalasia. After a long-term follow-up, a large percentage of patients reported recurrence of dysphagia. It is unclear which kind of procedure (redo POEM or LHM) should be utilized in these patients with failed POEM. We report the case of a 37-year-old female patient with type I achalasia who was successfully treated with LHM after a failed POEM procedure. After the manometric diagnosis of type I achalasia, the patient was treated with six balloon dilatations within a period of 5 months. Because of the persistence of symptoms a POEM procedure was performed with no relief and the patient was referred for surgical treatment. An esophagography showed a pronounced widening of the middle and the distal esophagus with a persistent narrowing of the lower esophageal sphincter (LES) and because of these indications LHM was performed. The intraoperative examination revealed extensive scarring of the submucosal layer with the muscularis mucosae of the distal esophagus; nevertheless, it was possible to carry out a 5 cm long cardiomyotomy without mucosal injury. The operation was completed with a Dor fundoplication. There were no postoperative complications. After surgery the patient reported an immediate and complete relief of dysphagia. The published experiences with POEM seem to show promising short-term results in terms of dysphagia relief; however, the few available mid-term analyses demonstrated no essential advantages when compared to LHM; therefore, the LHM must still be considered the gold standard procedure for definitive treatment of achalasia. According to our case report, LHM was shown to be a safe and effective although laborious treatment option due to scarring even after failed treatment by POEM.

  16. Per-oral endoscopic myotomy for achalasia. Are results comparable to laparoscopic Heller myotomy?

    Science.gov (United States)

    Kumagai, Koshi; Tsai, Jon A; Thorell, Anders; Lundell, Lars; Håkanson, Bengt

    2015-05-01

    Per-oral endoscopic myotomy (POEM) has recently been introduced as a minimal invasive alternative to conventional treatment for achalasia. This study aimed to clarify the feasibility and the short-term clinical efficacy of POEM as compared to laparoscopic Heller myotomy (LHM). Treatment outcomes were prospectively recorded and compared between the procedures in a nonrandomized fashion. Reduction rate (RR) in timed barium esophagogram (TBE) was calculated at 1, 2 and 5 min after barium ingestion as: RR = 1- postoperative barium height/preoperative barium height. Risk factors for treatment failure defined as the proportion of patients with RR <0.5 (1 min) and gastroesophageal reflux (GER) after POEM were analyzed. Forty-two consecutive patients who underwent POEM were compared to 41 patients who had a LHM during the immediate time period prior to the introduction of POEM. Ninety percent of the cases reported complete symptom relief after POEM. The percentage of esophageal emptying and RR in TBE improved dramatically by both procedures without significant difference. A longer operation time (odds ratio [OR] 32.80, 95%CI 2.99-359.82, p = 0.004) and younger age (OR 26.81, 95%CI 2.09-344.03, p = 0.012) were the independent predictors of treatment failure after POEM. GER was observed in seven patients where previous dilatation (OR 8.59, 95%CI 1.16-63.45, p = 0.035) and higher body mass index (OR 8.69, 95%CI 1.13-66.63, p = 0.037) were the independent predictors for symptomatic GER after POEM. POEM seems to be a safe and effective treatment option for achalasia in the short-term perspective; an effect well comparable to LHM.

  17. Is Dor fundoplication optimum after laparoscopic Heller myotomy for achalasia? A meta-analysis.

    Science.gov (United States)

    Wei, Ming-Tian; He, Ya-Zhou; Deng, Xiang-Bing; Zhang, Yuan-Chuan; Yang, Ting-Han; Jin, Cheng-Wu; Hu, Bing; Wang, Zi-Qiang

    2013-11-21

    To compare the outcome of acid reflux prevention by Dor fundoplication after laparoscopic Heller myotomy (LHM) for achalasia. Electronic database PubMed, Ovid (Evidence-Based Medicine Reviews, EmBase and Ovid MEDLINE) and Cochrane Library were searched between January 1995 and September 2012. Bibliographic citation management software (EndNote X3) was used for extracted literature management. Quality assessment of random controlled studies (RCTs) and non-RCTs was performed according to the Cochrane Handbook for Systematic Reviews of Interventions 5.1.0 and a modification of the Newcastle-Ottawa Scale, respectively. The data were analyzed using Review Manager (Version 5.1), and sensitivity analysis was performed by sequentially omitting each study. Finally, 6 studies, including a total of 523 achalasia patients, compared Dor fundoplication with other types of fundoplication after LHM (Dor-other group), and 8 studies, including a total of 528 achalasia patients, compared Dor fundoplication with no fundoplication after LHM (Dor-no group). Dor fundoplication was associated with a significantly higher recurrence rate of clinical regurgitation and pathological acid reflux compared with the other fundoplication group (OR = 7.16, 95%CI: 1.25-40.93, P = 0.03, and OR = 3.79, 95%CI: 1.23-11.72, P = 0.02, respectively). In addition, there were no significant differences between Dor fundoplication and no fundoplication in all subjects. Other outcomes, including complications, dysphagia, postoperative physiologic testing, and operation-related data displayed no significant differences in the two comparison groups. Dor fundoplication is not the optimum procedure after LHM for achalasia. We suggest more attention should be paid on quality of life among different fundoplications.

  18. Comparison of treatment outcomes of endoscope-guided pneumatic dilation and laparoscopic Heller myotomy.

    Science.gov (United States)

    Wang, Hsin-Ming; Tai, Wei-Chen; Chuah, Seng-Kee; Lu, Hung-I; Lu, Lung-Sheng; Liang, Chih-Ming; Kuo, Chung-Huang; Chiu, Yi-Chun; Wu, Keng-Liang; Changchien, Chi-Sin

    2015-12-01

    The debate on which is the better choice between laparoscopic Heller myotomy (LHM) and endoscopic pneumatic dilation (PD) for esophageal achalasia has been ongoing for decades. This study aims to compare the results of endoscope-guided PD and LHM in 42 patients with achalasia between May 1996 and August 2011. Twenty-one patients who had received PD and 21 who had received LHM were enrolled. The cumulative remission rate was analyzed using the Kaplan-Meier method with the assessment of symptom scores between grades before and after PD or LHM done at 6 weeks, 6 months, 1 year, and then every year thereafter. Possible confounding factors related to the remissions were analyzed by Cox's proportional hazard model. For PD, the cumulative remission rates were 81.0% (1 year), 76.2% (2), 66.7% (3), 61.9% (4), and 47.6% (5). For LHM, the cumulative remission rates were 90.5% every year from the 1(st) to the 5(th). The LHM patients had significantly better remission rates than the PD patients (p = 0.033, by log-rank test). The LHM group had a longer hospital stay than the PD group [median (interquartile range): 8 (6.5-10) days vs. 3 (2-3) days, p < 0.001) and had more reflux complications (52.4% vs. 19.0%, p = 0.024). No perforation occurred in either group. In conclusion, the 5-year cumulative effectiveness of LHM is better than that of PD despite the association of LHM with more reflux events (52.4%). Copyright © 2015. Published by Elsevier Taiwan.

  19. Long-term results of pneumatic dilatation for relapsing symptoms of achalasia after Heller myotomy.

    Science.gov (United States)

    Legros, Ludivine; Ropert, Alain; Brochard, Charlène; Bouguen, Guillaume; Pagenault, Maël; Siproudhis, Laurent; Bretagne, Jean-François

    2014-09-01

    The aim of this study was to assess the efficacy and safety of pneumatic dilatation (PD) to treat symptom recurrence after Heller myotomy (HM). Consecutive patients receiving PD for relapsing symptoms following prior HM were included in this retrospective single-center study. Eckardt score ≤3 and/or ∆ Eckardt (difference between Eckardt score before and after dilatation) ≥3 defined the success of initial dilatation. Patients who maintained response longer than 2 months after initial dilatation were defined as short-term responders. Relapsers were offered further on-demand dilatation. Remission was defined as an Eckardt score ≤3 at the study endpoint. Kaplan-Meier survival curves were used to determine relapse rates. Eighteen patients (11 women, seven men) were included from January 2004 to January 2013. Ten patients had type I achalasia, and seven had type III, according to the Chicago classification. Thirty-nine PDs were performed (1.5 [1-2.25] per patient). All patients had short-term responses. The remission rate at the endpoint, after a median follow-up of 33 months, was 78%, but 44% were treated with on-demand PD during the follow-up interval. The proportions of patients without relapse and subsequent PD were 72% at 12 months, 65% at 24 and 36 months, and 49% at 48 months. No factors predictive of long-term response, particularly the type of achalasia, could be identified in this series. There were no perforations. In treating symptom recurrence following HM, PD was safe and effective over the long term when combined with subsequent PD. © 2014 John Wiley & Sons Ltd.

  20. Per-Oral Endoscopic Myotomy Versus Laparoscopic Heller Myotomy for Achalasia

    Science.gov (United States)

    Zhang, Yuan; Wang, Hongjuan; Chen, Xingdong; Liu, Lan; Wang, Hongbo; Liu, Bin; Guo, Jianqiang; Jia, Hongying

    2016-01-01

    Abstract We aimed to assess the short-term outcomes of per-oral endoscopic myotomy (POEM) compared with laparoscopic Heller myotomy (LHM) for achalasia through a meta-analysis of nonrandomized comparative studies. We searched PubMed, Embase, Medline, Cochrane Library, and Google Scholar for studies that compared POEM and LHM for achalasia and were published between January 1, 2008 and December 31, 2014. The Methodological Index for Nonrandomized Studies (MINORS) was used to evaluate the quality of the studies. Random- and fixed-effects meta-analytical models were used, and between-study heterogeneity was assessed. Four nonrandomized comparative studies that included 317 patients (125 in the POEM group and 192 in the LHM group) met our research criteria and were assessed. There were no differences between the POEM and LHM groups in terms of sex, preoperative Eckhart score, length of myotomy, operation time, length of hospital stay, and complications. The patients in the POEM group were older than those in the LHM group (MD =2.81, 95% CI 0.27–5.35; P = 0.03) with high between-study homogeneity (χ2 = 1.96, df = 2, I2 = 0%; P = 0.38). The patients in the POEM group had a lower Eckardt score after surgery compared with those in the LHM group (MD = −0.30, 95% CI −0.42 to −0.18; P < 0.001) with high between-study homogeneity (χ2 = 0.00, df = 1, I2 = 0%; P = 1.00). The efficacy and safety of POEM appear to be comparable to those of LHM. Multicenter and randomized trials with larger sample size are needed to further compare the efficacy and safety of POEM and LHM for the treatment of achalasia. PMID:26871816

  1. Quality of life comparing dor and toupet after heller myotomy for achalasia.

    Science.gov (United States)

    Tomasko, Jonathan M; Augustin, Toms; Tran, Tung T; Haluck, Randy S; Rogers, Ann M; Lyn-Sue, Jerome R

    2014-01-01

    Laparoscopic Heller cardiomyotomy (LHC) is standard therapy for achalasia. Traditionally, an antireflux procedure has accompanied the myotomy. This study was undertaken to compare quality-of-life outcomes between patients undergoing myotomy with Toupet versus Dor fundoplication. In addition, we investigated overall patient satisfaction after LHC in the treatment of achalasia. One hundred thirty-five patients who underwent LHC over a 13-year period were identified for inclusion. Symptoms queried included dysphagia, heartburn, and bloating using the Gastroesophageal Reflux Disease-Health-Related Quality of Life Scale and a second published scale for the assessment of gastroesophageal reflux disease and dysphagia symptoms. The patients' overall satisfaction after surgery was also rated. Data were compared on the basis of type of fundoplication. Symptom scores were analyzed using chi-square tests and Fisher's exact tests. Sixty-three patients completed the survey (47%). There were no perioperative deaths or reoperations. The mean length of stay was 2.8 days. The mean operative time for LHC with Toupet fundoplication was 137.3±30.91 minutes and for LHC with Dor fundoplication was 111.5±32.44 minutes (P=.006). There was no difference with respect to the incidence or severity of postoperative heartburn, dysphagia, or bloating. Overall satisfaction with Toupet fundoplication was 87.5% and with Dor fundoplication was 93.8% (P>.999). LHC with either Toupet or Dor fundoplication gave excellent patient satisfaction. Postoperative symptoms of heartburn and dysphagia were equivalent when comparing LHC with either antireflux procedure. Dor and Toupet fundoplication were found to have equivalent outcomes in the short term. We prefer Dor to Toupet fundoplication because of its decreased need for extensive dissection and better mucosal protection.

  2. Comparison of treatment outcomes of endoscope-guided pneumatic dilation and laparoscopic Heller myotomy

    Directory of Open Access Journals (Sweden)

    Hsin-Ming Wang

    2015-12-01

    Full Text Available The debate on which is the better choice between laparoscopic Heller myotomy (LHM and endoscopic pneumatic dilation (PD for esophageal achalasia has been ongoing for decades. This study aims to compare the results of endoscope-guided PD and LHM in 42 patients with achalasia between May 1996 and August 2011. Twenty-one patients who had received PD and 21 who had received LHM were enrolled. The cumulative remission rate was analyzed using the Kaplan–Meier method with the assessment of symptom scores between grades before and after PD or LHM done at 6 weeks, 6 months, 1 year, and then every year thereafter. Possible confounding factors related to the remissions were analyzed by Cox's proportional hazard model. For PD, the cumulative remission rates were 81.0% (1 year, 76.2% (2, 66.7% (3, 61.9% (4, and 47.6% (5. For LHM, the cumulative remission rates were 90.5% every year from the 1st to the 5th. The LHM patients had significantly better remission rates than the PD patients (p = 0.033, by log-rank test. The LHM group had a longer hospital stay than the PD group [median (interquartile range: 8 (6.5–10 days vs. 3 (2–3 days, p < 0.001 and had more reflux complications (52.4% vs. 19.0%, p = 0.024. No perforation occurred in either group. In conclusion, the 5-year cumulative effectiveness of LHM is better than that of PD despite the association of LHM with more reflux events (52.4%.

  3. Novo registro altitudinal de Trichodactylus fluviatilis (Latreille, 1828 (Decapoda, Trichodactylidae no Brasil = New altitudinal record of Trichodactylus fluviatilis (Latreille, 1828 (Decapoda, Trichodactylidae in Brazil

    Directory of Open Access Journals (Sweden)

    Samuel Campos Gomides

    2009-07-01

    Full Text Available Trichodactylus fluviatilis (Latreille, 1828 (Decapoda, Trichodactylidae é uma espécie de caranguejo que habita rios e riachos montanhosos em altitudes até aproximadamente 500 m. Sua distribuição ocorre na América do Sul, desde as bacias costeiras da faixa leste do Brasil até a bacia do alto Paraná e na Argentina. O objetivo do presente trabalho foi registrar a ocorrência de T. fluviatilis em uma Unidade de Conservação de Juiz de Fora, Minas Gerais, e fornecer um novo registro altitudinal dessa espécie noBrasil. As amostras foram obtidas de outubro de 2004 a julho de 2005. Foram coletados três indivíduos vivos, dois machos e uma fêmea da espécie. Também foram analisados 16 regurgitos estomacais do cágado Hydromedusa maximiliani, dos quais, em seis foram encontrados partes corporais deste crustáceo. Muitas espécies de caranguejos do Brasil dafamília Trichodactylidae vivem em regiões acima de 500m do nível do mar. No presente estudo, T. fluviatilis foi coletado a 770 m de altitude, ampliando assim a faixa de distribuição altitudinal dessa espécie no Brasil. Até o presente estudo não existiam relatos de T. fluviatilis no município de Juiz de Fora, portanto este estudo também se constitui em um novo registro desse tricodatilídeo em Minas Gerais. Trichodactylus fluviatilis (Latreille, 1828 (Decapoda, Trichodactylidae is a crab species that lives in mountainous rivers and streams at altitudes up to 500m. Its distribution ranges from South America from the Basins of eastern coast of Brazil to basins of the Upper Paraná River and Argentina. The main objective of this study was to register a new occurrence of T. fluviatilis at a Conservation Unit in Juiz de Fora, Minas Gerais and provide a new altitudinal record for this species in Brazil. The samples were taken between October 2004 and July 2005. We collected three live T. fluviatilis individuals – two males and one female. We also analyzed the stomach contents of 16

  4. Produção de pós-larvas de Macrobrachium amazonicum (Heller, 1862 (Decapoda, Palaemonidae, sob condições controladas de laboratório

    Directory of Open Access Journals (Sweden)

    Aline Do Vale Barreto

    1982-01-01

    Full Text Available Studies on production of post-larvae of the prawn Macrobrachium amazonicum under controlled laboratory conditions were developed at the Departamento de Oceanografia da Universidade Federal de Pernambuco, from September 1980 to February 1982. Experiments were undertaken in aquaria and tanks where the salinity and density of the populations had been changed. The best production was obtained with salinity 14/00 with a density of 38 larvae per litre. The food provided for larvae was crushed fish and nauplii of Artemia salina. Out of 13 experiments a total of 20,000 post-larvae of Macrobrachium amazonicum were obtained.

  5. Biodiversidad marina de Costa Rica: Crustacea: Infraorden Anomura

    Directory of Open Access Journals (Sweden)

    Rita Vargas

    2006-06-01

    Full Text Available El grupo de los cangrejos anomuros es uno de los mejor conocidos de la costa Pacífica de Costa Rica, pero muy poco conocidos de la costa Caribe. En esta recopilación, basada en la literatura y en las colecciones del Museo de Zoología, Escuela de Biología, Universidad de Costa Rica, informamos de la presencia de 114 especies del Infraorden Anomura en Costa Rica, 20 especies del Caribe, 96 especies del Pacífico, y dos especies presentes en ambas costa. Veintinueve especies son informes nuevos para Costa Rica, 15 del Caribe (75% del total de especies informadas para esa costa y 14 del Pacífica (15% del total de esa costa. La distribución de diez especies es ampliada hasta Costa Rica, siete en el Caribe y tres en el Pacífico. Seis especies son informadas por primera vez para la Isla del Coco, donde además hay cuatro especies endémicas.Marine biodiversity of Costa Rica: Crustacea: Infraorder Anomura. The anomuran crabs are among the best known crustacean groups from the Pacific coast. However, this group is poorly known from the Caribbean coast of Costa Rica. In this compilation based on the literature and the collection at the Zoology Museum, Biology School, University of Costa Rica, we report the presence of 114 species of the Infraorder Anomura for Costa Rica, 20 species from the Caribbean, 96 species from the Pacific (two are present on both coasts. Twenty-nine species are new reports for Costa Rica, 15 from the Caribbean coast (74% of the total of species from that coast and 14 from the Pacific (15% of the total from the Pacific. The range of ten species is extended to Costa Rica, siete from the Caribbean and three from the Pacific. Six species are reported for the first time from Cocos Island, where there are also four endemic species. Rev. Biol. Trop. 54(2: 461-488. Epub 2006 Jun 01.

  6. Results of the surgical treatment of non-advanced megaesophagus using Heller-Pinotti's surgery: Laparotomy vs. Laparoscopy

    Directory of Open Access Journals (Sweden)

    Luiz Roberto Lopes

    2011-01-01

    Full Text Available INTRODUCTION: Dysphagia is the important symptom in achalasia, and surgery is the most common treatment. The Heller-Pinotti technique is the method preferred by Brazilian surgeons. For many years, this technique was performed by laparotomy, and now the laparoscopic method has been introduced. The objective was to evaluate the immediate and long-term results of patients submitted to surgery by either laparotomy or laparoscopy. MATERIALS AND METHODS: A total of 67 patients submitted to surgery between 1994 and 2001 with at least 5 years of follow-up were evaluated retrospectively and divided into two groups: laparotomy (41 patients and laparoscopy (26 patients. Chagas was the etiology in 76.12% of cases. Dysphagia was evaluated according to the classification defined by Saeed et al. RESULTS: There were no cases of conversion to open surgery. The mean duration of hospitalization was 3.32 days for laparotomy and 2.54 days for laparoscopy (p<0.05. An improvement in dysphagia occurred with both groups reporting good or excellent results (laparotomy: 73.17% and laparoscopy: 73.08%. Mean duration of follow-up was 8 years. CONCLUSIONS: There was no difference between the two groups with respect to relief from dysphagia, thereby confirming the safety and effectiveness of the Heller-Pinotti technique, which can be performed by laparotomy or laparoscopy, depending on the surgeon's experience.

  7. Long-term results of the European achalasia trial: a multicentre randomised controlled trial comparing pneumatic dilation versus laparoscopic Heller myotomy

    NARCIS (Netherlands)

    Moonen, An; Annese, Vito; Belmans, Ann; Bredenoord, Albert J.; Bruley des Varannes, Stanislas; Costantini, Mario; Dousset, Bertrand; Elizalde, J. I.; Fumagalli, Uberto; Gaudric, Marianne; Merla, Antonio; Smout, Andre J.; Tack, Jan; Zaninotto, Giovanni; Busch, Olivier R.; Boeckxstaens, Guy E.

    2016-01-01

    Achalasia is a chronic motility disorder of the oesophagus for which laparoscopic Heller myotomy (LHM) and endoscopic pneumodilation (PD) are the most commonly used treatments. However, prospective data comparing their long-term efficacy is lacking. 201 newly diagnosed patients with achalasia were

  8. Achalasia symptom response after Heller myotomy segregated by high-resolution manometry subtypes.

    Science.gov (United States)

    Patel, Amit; Patel, Ami; Mirza, Faiz A; Soudagar, Samad; Sayuk, Gregory S; Gyawali, C Prakash

    2016-02-01

    Achalasia is classified into three HRM subtypes that predict outcomes from diverse management strategies. We assessed if symptomatic response varied when a single management strategy-Heller myotomy (HM)-is employed. Treatment-naive subjects with achalasia referred for HM were followed in this observational cohort study. Chicago criteria designated achalasia subtypes (subtype I: no esophageal pressurization; subtype II: panesophageal pressurization in ≥20 % swallows; subtype III: premature contractions in ≥20 % swallows). Symptom questionnaires assessed symptom burden before and after HM on five-point Likert scales (0 = no symptoms, 4 = severe symptoms) and on 10-cm visual analog scales (global symptom severity, GSS); satisfaction with HM was recorded similarly. Data were analyzed to determine predictors of GSS change across subtypes. Sixty achalasia subjects (56.1 ± 2.4 years, 55 % female) fulfilled inclusion criteria, 15 % with subtype I, 58 % with subtype II, and 27 % with subtype III achalasia. Baseline symptoms included dysphagia (solids: 85 %, liquids: 73 %), regurgitation (84 %), and chest pain (35 %); mean GSS was 7.1 ± 0.3. Upon follow-up 2.1 ± 0.2 years after HM, GSS declined to 1.9 ± 0.4 (p < 0.001), with surgical satisfaction score of 8.7 ± 0.3 out of 10; these were similar across achalasia subtypes. On univariate analysis, female gender, Eckardt score, severity of transit symptoms, and maximal IRP predicted linear GSS improvement; female gender (p = 0.003) and dysphagia for liquids (p = 0.043) remained predictive on multivariate analysis. When a uniform surgical approach is utilized, symptomatic outcome and satisfaction with therapy are similar across achalasia subtypes. Female gender and severity of dysphagia for solids may predict better HM outcome.

  9. Laparoscopic Heller myotomy is not superior to pneumatic dilation in the management of primary achalasia

    Science.gov (United States)

    Cheng, Ji-Wei; Li, Yin; Xing, Wen-Qun; Lv, Hong-Wei; Wang, Hao-Ran

    2017-01-01

    Abstract Background: Achalasia is an esophageal motility disorder, of unknown cause, which results in increased lower esophageal sphincter tone and symptoms of difficulty swallowing. Current major therapeutic options include laparoscopic Heller myotomy (LHM) and pneumatic dilation (PD). We undertake a systematic review comparing the efficacy and safety of these 2 treatments in the treatment of esophageal achalasia. Methods: PubMed, Embase, and Cochrane Central Register of Controlled Trials were searched for randomized controlled trial investigating LHM versus PD in the treatment of primary achalasia. The primary outcome was symptom remission rates. The Mantel–Haenszel method with fixed-effect or random-effects model was used to calculate relative risks and 95% confidence intervals (CIs). Results: Five studies involving 498 participants were included. The cumulative remission rate was significantly higher with LHM at 3 months and 1 year (short-term), with a risk ratio of 1.16 (95% CI 1.01–1.35, P = 0.04) and 1.14 (95% CI 1.02–1.27, P = 0.02), respectively. There were no significant differences between LHM and PD in 2-year and 5-year remission rate (long-term), with a risk ratio of 1.05 (95% CI 0.91–1.22, P = 0.49) and 1.17 (95% CI 0.84–1.64, P = 0.34), respectively. Rates of major mucosal tears requiring subsequent intervention with LHM were significantly lower than those of esophageal perforation with PD requiring postprocedural medical or surgical therapy, with a risk ratio of 0.25 (95% CI 0.08–0.81, P = 0.02). Postprocedural rates of gastroesophageal reflux, lower esophageal sphincter pressures, and quality of life scores did not differ in trials with sufficient data. Conclusions: There were no significant differences between LHM and PD in 2-year and 5-year remission rate. This study indicates that either treatment can be proposed as initial treatment for achalasia. PMID:28207499

  10. National outcomes of laparoscopic Heller myotomy: operative complications and risk factors for adverse events.

    Science.gov (United States)

    Ross, Samuel W; Oommen, Bindhu; Wormer, Blair A; Walters, Amanda L; Matthews, Brent D; Heniford, B T; Augenstein, Vedra A

    2015-11-01

    Laparoscopic Heller myotomy (LHM) has supplanted an open approach due to decreased operative morbidity. Our goal was to quantify the incidence of peri-operative complications and identify risk factors for adverse outcomes in LHM. All LHM were queried from 2005 to 2011 from the National Surgical Quality Improvement Program database. Adverse outcomes were identified, and univariate and stepwise logistic regression (MVR) was then performed to quantify association. There were 1,237 LHM in the study period. Patient averages were: age 51.9 ± 16.8 years, BMI 27.3 ± 6.6 kg/m(2), Charlson comorbidity index (CCI) 0.2 ± 0.6. 15.3 % had >10 % body mass loss in the preoperative 6 months. During surgery, 10.2 % underwent concomitant EGD, and mean operative time was 141.6 ± 63.4 min. There were 7(0.06 %) wound complications, 22(1.8 %) general complications, and 30(2.4 %) major complications. Average length of stay (LOS) was 2.8 ± 5.5 days. The rate of readmission and reoperation were 3.1 and 2.3 %, respectively, and there were 4(0.03 %) deaths. General and major complications were associated with alcohol use, pack-years of smoking, weight loss, history of stroke, radiation therapy, and longer operative times (p  0.05). Operative time was found to be significantly longer by 35.3 min for inpatients, 43.1 min in functionally dependent patients, 50.0 min in preoperative septic patients, and 17.2 min with concomitant EGD (p < 0.01 for all). LOS was found to be longer by 1.9 days for inpatients, 1.8 days in ASA category ≥3, and 1.2 days per one point increase in CCI (p < 0.001 for all). LHM is being performed nationally with a low incidence of operative complications and mortality. General and major complications following LHM are associated with patient alcohol use, pack-years of smoking, weight loss, history of stroke, radiation therapy, and longer operative times. Additionally, independent predictors of longer operative time and LOS were

  11. Qualidade de vida após a cardiomiotomia à Heller-Dor

    Directory of Open Access Journals (Sweden)

    Fernando A.V. Madureira

    Full Text Available OBJETIVOS: Avaliar os resultados da cardiomiotomia de Heller associada à fundoplicatura de Dor por Laparoscopia (HDL no tratamento cirúrgico da acalásia do esôfago, através de escores de qualidade de vida e dados da esofagomanometria. MÉTODOS: Foram estudados retrospectivamente 60 pacientes operados por acalasia do cárdia, de 2001 a 2007, sendo analisadas no pré-operatório as características desta população e os resultados das provas diagnósticas. Aplicamos um escore de disfagia e de qualidade de vida no pré e pós-operatório e realizamos o estudo do comportamento da pressão do esfíncter esofageano inferior (Peei no pré e pós operatório de todos os pacientes. RESULTADOS: Eram 37 do sexo feminino e 23 do masculino. A idade média foi 41,08 anos(12 a 87. Não houve mortalidade cirúrgica, nem conversões. Tempo médio de início da dieta foi de 1,6 dias. Considerado resultado excelente em 80% da série, resultados intermediários em 20%. A média do escore de disfagia no pré operatório foi de 9,03 pontos e a média de pós, foi de 1,7 pontos (máximo de 10 pontos, p=0,0001, sendo observada queda entre pré e pós-operatório de 7,33 pontos, 81,17%. A média da Peei no pré-operatório foi de 32,41 mmhg e no pós 12,7 mmhg. CONCLUSÃO: A cirurgia HDL é procedimento seguro de ser realizado e apresentou bons resultados, sendo capaz de modificar os escores de qualidade de vida subjetivos, e os dados objetivos da Peei, de forma significativa.

  12. Self-expandable metal stent placement in a child for treatment of achalasia after failed Heller myotomy.

    Science.gov (United States)

    Gugig, Roberto; Muñoz Jurado, Guillermo; Huang, Clifton; Oleas, Roberto; Robles-Medranda, Carlos

    2018-01-01

    Background and study aims  Childhood achalasia treatment remains inconclusive. What is next after myotomy failure? Repeated pneumatic-dilation put patients at greater risk of perforation with possible symptom recurrence. We report on a 12-year-old patient with a 1-year history of achalasia whom underwent Heller myotomy with fundoplication and recurred with symptoms 1 week after surgery. Pneumatic dilatation was considered but not done because of the risk of esophageal perforation. The decision was made to place a fully covered self-expanding metallic stent (FC-SEMS) for 3 months, which resolved the stenosis as confirmed by esophagram. The patient has remained asymptomatic since the procedure was performed 2 years ago. FC-SEMS is an alternative for treatment of refractory achalasia in children who do not respond to conventional treatment.

  13. Efficacy and durability of robotic Heller myotomy for achalasia: patient symptoms and satisfaction at long-term follow-up.

    Science.gov (United States)

    Perry, Kyle A; Kanji, Aliyah; Drosdeck, Joseph M; Linn, John G; Chan, Anthony; Muscarella, Peter; Melvin, W Scott

    2014-11-01

    Laparoscopic Heller myotomy (LHM) has become the standard treatment for achalasia in the USA. Robot-assisted Heller myotomy (RHM) has emerged as an alternative approach due to improved visualization and fine motor control, but long-term follow-up studies have not been reported. We sought to report the long-term outcomes of RHM and compare them to those of LHM. A retrospective cohort study was performed for patients who underwent laparoscopic or RHM between 1995 and 2006. Long-term follow-up was performed via mail or telephone questionnaire. The primary outcome measure was durable relief of dysphagia without need for further intervention. Secondary outcomes included gastroesophageal reflux symptoms, disease-specific quality of life, and patient satisfaction with their operation. Seventy-five patients underwent laparoscopic (n = 19) or robotic (n = 56) myotomy during the study period. Long-term follow-up was obtained in 53 (71 %) patients with a median interval of 9 years. RHM was associated with a decreased mucosal injury rate (0 vs. 16 %, p = 0.01) and median hospital stay (1 vs. 2 days, p myotomy and 80 % after laparoscopic myotomy (p = 0.27). Overall, 95 % of patients were satisfied with their operation, and 91 % would choose surgery again given the benefit of hindsight. There is a dearth of long-term follow-up data to support the effectiveness of RHM. This study demonstrates durable dysphagia relief in the vast majority of patients with a high degree of patient satisfaction and a low rate of esophageal mucosal injury. While a significant proportion of patients report reflux symptoms, these symptoms are well controlled with medical acid suppression.

  14. Description of a new species of Petrolisthes in the Indo-West Pacific with a redefinition of P.hastatus Stimpson, 1858 and resurrection of P.inermis (Heller, 1862) (Crustacea, Anomura, Porcellanidae).

    Science.gov (United States)

    Werding, Bernd; Hiller, Alexandra

    2015-01-01

    The porcellanid crab Petrolistheshastatus Stimpson, 1858, has been traditionally viewed as a highly variable species with a wide distribution in the West Pacific. For more than a century there has been taxonomic confusion of this species with morphologically similar taxa, some of which were synonymized with Stimpson's taxon. We redefine Petrolistheshastatus, resurrect Petrolisthesinermis as a valid species, discuss the status of Petrolisthestenkatei De Man, 1893, and describe a new species as Petrolistheselegantissimus from Indonesia.

  15. Description of a new species of Petrolisthes in the Indo-West Pacific with a redefinition of P. hastatus Stimpson, 1858 and resurrection of P. inermis (Heller, 1862 (Crustacea, Anomura, Porcellanidae

    Directory of Open Access Journals (Sweden)

    Bernd Werding

    2015-08-01

    Full Text Available The porcellanid crab Petrolisthes hastatus Stimpson, 1858, has been traditionally viewed as a highly variable species with a wide distribution in the West Pacific. For more than a century there has been taxonomic confusion of this species with morphologically similar taxa, some of which were synonymized with Stimpson’s taxon. We redefine P. hastatus, resurrect P. inermis as a valid species, discuss the status of P. tenkatei De Man, 1893, and describe a new species as P. elegantissimus from Indonesia.

  16. Removal of garlic-like off-odours from crustacea by gamma irradiation

    International Nuclear Information System (INIS)

    Freeman, D.J.; Izzard, M.E.; Whitfield, F.B.

    1985-01-01

    The strong garlic-like off-odours associated with the male shovel-nosed lobster (Ibacus peronii) and the royal red prawn (Hymenopenaeus sibogae) have been attributed principally to the presence of the sulphur-containing compound bis-(methylthio)-methane. In the male shovel-nosed lobster the concentration of this compound increases very rapidly following death, and a small number of contaminated crustacea may cause an entire consignment to be condemned. A method for removing this noxious odour was developed which involved gamma-irradiation of the affected crustacea using a cobalt-60 source. Eight lobsters were subjected to gamma-irradiation at a dose rate of 10 kGy an hour; one half of each was given a dose of 25 kGy and the other half a dose of 5 kGy. Results showed that a high dose completely removes the existing off-odour, and also prevents its further formation. With the lower dose the off-odour is not completely removed. A trial using fresh royal red prawns at doses of 0.5 and 1.0 kGy showed irradiation removed all traces of the off-odour, but in those irradiated at the higher dose a slight burnt flavour was noticeable

  17. Removal of garlic-like off-odours from crustacea by gamma irradiation

    Energy Technology Data Exchange (ETDEWEB)

    Freeman, D J; Izzard, M E [Australian Atomic Energy Commission Research Establishment, Lucas Heights; Whitfield, F B [Commonwealth Scientific and Industrial Research Organization, North Ryde (Australia). Div. of Food Research

    1985-04-01

    The strong garlic-like off-odours associated with the male shovel-nosed lobster (Ibacus peronii) and the royal red prawn (Hymenopenaeus sibogae) have been attributed principally to the presence of the sulphur-containing compound bis-(methylthio)-methane. In the male shovel-nosed lobster the concentration of this compound increases very rapidly following death, and a small number of contaminated crustacea may cause an entire consignment to be condemned. A method for removing this noxious odour was developed which involved gamma-irradiation of the affected crustacea using a cobalt-60 source. Eight lobsters were subjected to gamma-irradiation at a dose rate of 10 kGy an hour; one half of each was given a dose of 25 kGy and the other half a dose of 5 kGy. Results showed that a high dose completely removes the existing off-odour, and also prevents its further formation. With the lower dose the off-odour is not completely removed. A trial using fresh royal red prawns at doses of 0.5 and 1.0 kGy showed irradiation removed all traces of the off-odour, but in those irradiated at the higher dose a slight burnt flavour was noticeable.

  18. Post-Surgical Quality of Life, Psychological State and what Patients Think about the Effectiveness of Heller Myotomy in the Treatment of Achalasia.

    Science.gov (United States)

    Vale-Fonseca, Telma; Ferreira-Pinto, Luis; Figueiredo-Braga, Margarida; Carneiro, Silvestre

    2016-02-01

    The disruption of esophageal motility that characterizes achalasia typically provokes dysphagia, pain, loss of weight and malnutrition. Therefore, patients frequently report a reduction in quality of life and negative emotional states. Laparoscopic Heller myotomy proved to be an effective therapy, enabling the resumption of good quality of life. The authors studied 45 patients previously submitted to laparoscopic Heller myotomy. Postoperative evaluation was performed using a customized version of the achalasia disease-specific quality of life questionnaire. Quality of life and the presence of depressive and anxiety symptoms were assessed using the Portuguese versions of the Medical Outcomes Study SF-36 and the Hospital Anxiety and Depression Scale. Thirty-one patients responded to the survey. Dysphagia was the main clinical symptom before surgery. A clear improvement in dysphagia, regurgitation, pain and weight loss was found after surgery (p Heller myotomy is associated with a good quality of life in patients with achalasia and strengthens the evidence that this is a safe and reliable procedure.

  19. A cladistic analysis of the genera of Macrothricidae Norman & Brady (Crustacea, Cladocera, Radopoda Análise cladística dos gêneros de Macrothticidae Norman & Brady (Crustacea, Cladocera, Radopoda

    Directory of Open Access Journals (Sweden)

    Lourdes M. A. Elmoor-Loureiro

    2005-09-01

    Full Text Available A cladistic analysis of the genera of the Macrothricidae (Crustacea, Cladocera, Radopoda was performed based on 36 morphological characters, and including 15 terminal taxa (three as outgroups. The single tree obtained from this analysis supported the monophyly of Macrothricidae and Macrothricinae. The group called as "non-Macrothricinae" was indicated as paraphyletic. Neothricidae was also not supported.Foi conduzida uma análise cladística dos gêneros sul-americanos de Macrothricidae (Crustacea, Cladocera, Radopoda com base em 36 caracteres morfológicos e incluindo 15 taxa terminais (três como grupos externos. Uma única árvore foi obtida pela análise, a qual suporta o monofiletismo de Macrothricidae e de Macrothricinae. O grupo chamado de "não-Macrothricinae" é indicado como parafilético. Neothricidae também não encontrou suporte.

  20. Decapoda, Brachyura

    African Journals Online (AJOL)

    1992-10-02

    Oct 2, 1992 ... The tidal exchange of larvae of the salt-marsh grapsid crab Sesarma catenata was studied in the ... gests that one of two generic mechanisms of larval dispersal .... den~y. in order, to eliminate possible time-dependent.

  1. Decapoda: Potamonautidae

    African Journals Online (AJOL)

    1999-02-09

    Feb 9, 1999 ... Zoology Department, University of the Western Cape, Private Bag X17, Bellville, 7535 South Africa. Barbara A. Stewart. Zoology Department, University of Stellenbosch, Private Bag X 1, Matieland, 7602 South Africa. Received 21 ... Introduction. The classification of aquatic inland invertebrates has received.

  2. Achalasia-Specific Quality of Life After Pneumatic Dilation or Laparoscopic Heller Myotomy With Partial Fundoplication: A Multicenter, Randomized Clinical Trial.

    Science.gov (United States)

    Chrystoja, Caitlin C; Darling, Gail E; Diamant, Nicholas E; Kortan, Paul P; Tomlinson, George A; Deitel, Wayne; Laporte, Audrey; Takata, Julie; Urbach, David R

    2016-11-01

    Achalasia is a chronic, progressive, and incurable esophageal motility disease. There is clinical uncertainty about which treatment should be recommended as first-line therapy. Our objective was to evaluate the effectiveness of pneumatic dilation compared with laparoscopic Heller myotomy with partial fundoplication in improving achalasia-specific quality of life. This was a prospective, multicenter, randomized trial at five academic hospitals in Canada. Fifty previously untreated adults with a clinical diagnosis of primary achalasia, confirmed by manometric testing, were enrolled between November 2005 and March 2010, and followed for 5 years after treatment. Randomization was stratified by site, in random blocks of size four and with balanced allocation. Patients were treated with pneumatic dilation or laparoscopic Heller myotomy with partial fundoplication. The primary outcome was the difference between the treatments in the mean improvement of the achalasia severity questionnaire (ASQ) score at 1 year from baseline. Prespecified secondary outcomes included general and gastrointestinal quality of life, symptoms, esophageal physiology measures (lower esophageal sphincter relaxation and pressure, esophageal emptying, abnormal esophageal acid exposure), complications, and incidence of retreatment. Functional and imaging studies were performed blinded and all outcome assessors were blinded. There were no significant differences between treatments in the improvement of ASQ score at 1 year from baseline (27.5 points in the Heller myotomy arm vs. 20.2 points in the pneumatic dilation arm; difference 7.3 points, 95% confidence interval -4.7 to 19.3; P=0.23). There were no differences between treatments in improvement of symptoms, general and gastrointestinal quality of life, or measures of esophageal physiology. Improvements in ASQ score diminished over time for both interventions. At 5 years, there were no differences between treatments in improvement of ASQ score

  3. Laparoscopic limited Heller myotomy without anti-reflux procedure does not induce significant long-term gastroesophageal reflux.

    Science.gov (United States)

    Zurita Macías Valadez, L C; Pescarus, R; Hsieh, T; Wasserman, L; Apriasz, I; Hong, D; Gmora, S; Cadeddu, M; Anvari, M

    2015-06-01

    Laparoscopic Heller myotomy with partial fundoplication is the gold standard treatment for achalasia. Laparoscopic limited Heller myotomy (LLHM) with no anti-reflux procedure is another possible option. A review of prospectively collected data was performed on patients who underwent LLHM from January 1998 to December 2012. Evaluation included gastroscopy, esophageal manometry, 24-h pH-metry, and the Short Form(36) Health Survey(SF-36) questionnaire at baseline and 6 months, as well as the global symptom score at baseline, 6 months, and 5 years post-surgery. Comparison between outcomes was performed with a paired t student's test. 126 patients underwent LLHM. Of these, 60 patients had complete pre and post-operative motility studies. 57 % were female, patient mean age was 45.7 years, with a mean follow-up of 10.53 months. Mean operative time was 56.1 min, and the average length of stay was 1.7 days. At 6 months, a significant decrease in the lower esophageal sphincter resting pressure (29.1 vs. 7.1 mmHg; p < 0.001) and nadir (16.4 vs. 4.3 mmHg; p < 0.001) was observed. Normal esophageal acid exposure (total pH < 4 %) was observed in 68.3 % patients. Nevertheless, of the remaining 31.7 % with abnormal pH-metry, only 21.6 % were clinically symptomatic and all were properly controlled with medical treatment without requiring anti-reflux surgery. Significant improvement in all pre-operative symptoms was observed at 6 months and maintained over 5 years. Dysphagia score was reduced from 9.8 pre-operatively to 2.6 at 5 years (p < 0.001), heartburn score from 3.82 to 2 (p < 0.01), and regurgitation score from 7.5 to 0.8 (p < 0.001). Only one patient (0.8 %) presented with recurrent dysphagia requiring reoperation. LLHM without anti-reflux procedure is an effective long-term treatment for achalasia and does not cause symptomatic GERD in three quarters of patients. The remaining patients are well controlled on anti-reflux medications. It is believed that similar clinical

  4. A dataset on the species composition of amphipods (Crustacea) in a Mexican marine national park: Alacranes Reef, Yucatan

    OpenAIRE

    Paz,Carlos; Simões,Nuno; Pech,Daniel

    2018-01-01

    Abstract Background Alacranes Reef was declared as a National Marine Park in 1994. Since then, many efforts have been made to inventory its biodiversity. However, groups such as amphipods have been underestimated or not considered when benthic invertebrates were inventoried. Here we present a dataset that contributes to the knowledge of benthic amphipods ( Crustacea , Peracarida ) from the inner lagoon habitats from the Alacranes Reef National Park, the largest coral reef ecosystem in the Gul...

  5. Dor Vs Toupet Fundoplication After Laparoscopic Heller Myotomy: Long-Term Randomized Controlled Trial Evaluated by High-Resolution Manometry.

    Science.gov (United States)

    Torres-Villalobos, Gonzalo; Coss-Adame, Enrique; Furuzawa-Carballeda, Janette; Romero-Hernández, Fernanda; Blancas-Breña, Blanca; Torres-Landa, Samuel; Palacios-Ramírez, Axel; Alejandro-Medrano, Edgar; Hernández-Ávila, Axel; Flores-Najera, Athenea; Ávila Escobedo, Lourdes Margarita; Ramírez Angulo, Cecilia; Rodríguez-Garcés, Angélica; Valdovinos, Miguel Ángel

    2018-01-01

    Laparoscopic Heller myotomy (LHM) with partial fundoplication is an effective treatment for achalasia. However, the type of fundoplication is still a subject of debate. The aim of the study is to identify which partial fundoplication leads to better control of acid exposure, manometric parameters, and symptoms scores. A randomized controlled trial was performed to compare Dor vs Toupet fundoplication after LHM. The preoperative diagnosis was made by high-resolution manometry (HRM), upper endoscopy, and barium esophagogram. Preoperative and postoperative symptoms were evaluated with Eckardt, GERD-HRQL, and EAT-10 questionnaires. Seventy-three patients were randomized, 38 underwent Dor and 35 Toupet. Baseline characteristics were similar between groups. Postoperative HRM showed that the integrated relaxation pressure (IRP) and basal lower esophageal sphincter (LES) pressure were similar at 6 and 24 months. The number of patients with abnormal acid exposure was significantly lower for Dor (6.9%) than that of Toupet (34.0%) at 6 months, but it was not different at 12 or 24 months. No differences were found in postoperative symptom scores at 1, 6, or 24 months. There were no differences in symptom scores or HRM between fundoplications in the long term. A higher percentage of abnormal 24-h pH test were found for the Toupet group, with no difference in the long term.

  6. Major Complications of Pneumatic Dilation and Heller Myotomy for Achalasia: Single Center Experience and Systematic Review of the Literature

    Science.gov (United States)

    Lynch, Kristle L; Pandolfino, John E; Howden, Colin W; Kahrilas, Peter J

    2013-01-01

    Background & Aims Pneumatic dilation (PD) and laparoscopic Heller myotomy (LHM) can be definitive therapies for achalasia; recent data suggest comparable efficacy. However, risk must also be considered. We reviewed the major complication rate of PD and LHM in a high volume center and reviewed the corresponding literature. Methods We reviewed 12 years of our institution’s achalasia treatment experience. During this interval a consistent technique of PD was used utilizing Rigiflex dilators. Medical records were reviewed for post-procedure complications. We administered a telephone survey and examined medical records to assess efficacy of treatment. We also performed a systematic review of the literature for comparable clinical data and examined 80 reports encompassing 12,494 LHM and PD procedures. Results At our center, 463 achalasia patients underwent 567 PD or LHM procedures. 78% of the PDs used a 30 mm Rigiflex dilator. 157/184 (85%) patients underwent 1 or 2 PD without any subsequent treatment. There were seven clinically significant perforations; one from PD and 6 from LHM. There were no resultant deaths from these perforations; two deaths occurred within 30 days of LHM from unrelated causes. Complications and deaths post-PD were significantly fewer than those post-LHM (p=.02). Conclusions Esophageal perforation from PD at our high-volume center was less common than often reported and lower than that associated with LHM. We conclude that, in the hands of experienced operators using conservative technique, PD has fewer major complications and deaths than LHM. PMID:23032978

  7. An extended proximal esophageal myotomy is necessary to normalize EGJ distensibility during Heller myotomy for achalasia, but not POEM.

    Science.gov (United States)

    Teitelbaum, Ezra N; Soper, Nathaniel J; Pandolfino, John E; Kahrilas, Peter J; Boris, Lubomyr; Nicodème, Frédéric; Lin, Zhiyue; Hungness, Eric S

    2014-10-01

    For laparoscopic Heller myotomy (LHM), the optimal myotomy length proximal to the esophagogastric junction (EGJ) is unknown. In this study, we used a functional lumen imaging probe (FLIP) to measure EGJ distensibility changes resulting from variable proximal myotomy lengths during LHM and peroral esophageal myotomy (POEM). Distensibility index (DI) (defined as the minimum cross-sectional area at the EGJ divided by pressure) was measured with FLIP after each operative step. During LHM and POEM, each patient's myotomy was performed in two stages: first, a myotomy ablating only the EGJ complex was created (EGJ-M), extending from 2 cm proximal to the EGJ, to 3 cm distal to it. Next, the myotomy was lengthened 4 cm further cephalad to create an extended proximal myotomy (EP-M). Measurements were performed in 12 patients undergoing LHM and 19 undergoing POEM. LHM resulted in an overall increase in DI (1.6 ± 1 vs. 6.3 ± 3.4 mm(2)/mmHg, p myotomy to an EP-M had no additional effect. POEM resulted in a larger overall increase from baseline than LHM (7.9 ± 3.5 vs. 4.7 ± 3.3 mm(2)/mmHg, p myotomy confined to the EGJ complex was sufficient. In this cohort, POEM resulted in a larger overall increase in EGJ distensibility.

  8. Development of a novel ex vivo porcine laparoscopic Heller myotomy and Nissen fundoplication training model (Toronto lap-Nissen simulator).

    Science.gov (United States)

    Ujiie, Hideki; Kato, Tatsuya; Hu, Hsin-Pei; Bauer, Patrycja; Patel, Priya; Wada, Hironobu; Lee, Daiyoon; Fujino, Kosuke; Schieman, Colin; Pierre, Andrew; Waddell, Thomas K; Keshavjee, Shaf; Darling, Gail E; Yasufuku, Kazuhiro

    2017-06-01

    Surgical trainees are required to develop competency in a variety of laparoscopic operations. Developing laparoscopic technical skills can be difficult as there has been a decrease in the number of procedures performed. This study aims to develop an inexpensive and anatomically relevant model for training in laparoscopic foregut procedures. An ex vivo , anatomic model of the human upper abdomen was developed using intact porcine esophagus, stomach, diaphragm and spleen. The Toronto lap-Nissen simulator was contained in a laparoscopic box-trainer and included an arch system to simulate the normal radial shape and tension of the diaphragm. We integrated the use of this training model as a part of our laparoscopic skills laboratory-training curriculum. Afterwards, we surveyed trainees to evaluate the observed benefit of the learning session. Twenty-five trainees and five faculty members completed a survey regarding the use of this model. Among the trainees, only 4 (16%) had experience with laparoscopic Heller myotomy and Nissen fundoplication. They reported that practicing with the model was a valuable use of their limited time, repeating the exercise would be of additional benefit, and that the exercise improved their ability to perform or assist in an actual case in the operating room. Significant improvements were found in the following subjective measures comparing pre- vs. post-training: (I) knowledge level (5.6 vs. 8.0, Pmyotomy and fundoplication.

  9. Comparison of outcomes of laparoscopic Heller myotomy versus per-oral endoscopic myotomy for management of achalasia.

    Science.gov (United States)

    Leeds, Steven G; Burdick, J S; Ogola, Gerald O; Ontiveros, Estrellita

    2017-10-01

    Achalasia is a rare disorder that has several treatment options. The gold standard of treatment is a surgical myotomy called a laparoscopic Heller myotomy (LHM). More recently, an endoscopic myotomy has become an option as well, called per-oral endoscopic myotomy (POEM). An achalasia registry was queried for patients undergoing either LHM or POEM at Baylor University Medical Center at Dallas. Patient demographics, preoperative and postoperative data points, and Eckardt scores were collected. The patients were further stratified into their follow-up intervals, immediate postoperative and long-term follow-up, to assess surgical success. A subset analysis was done for success of treatment for patients who had redo surgery versus those undergoing the procedure for the first time. There were 12 patients in the POEM group and 11 patients in the LHM group. Both groups demonstrated mean lower esophageal sphincter pressures with failure to relax. Procedure length and hospital length of stay were similar between the two groups. There were three adverse events in each group, but none altered the patient's postoperative clinical course. Eckardt scores, used to assess success of the surgery, were 82% for POEM patients and 66% for LHM patients after 6 months. The outcomes for POEM and LHM in our early experience are similar to those reported in the literature for high-volume centers managing achalasia.

  10. A Matched Comparison of Per Oral Endoscopic Myotomy to Laparoscopic Heller Myotomy in the Treatment of Achalasia.

    Science.gov (United States)

    Schneider, Andreas M; Louie, Brian E; Warren, Heather F; Farivar, Alexander S; Schembre, Drew B; Aye, Ralph W

    2016-11-01

    Per oral endoscopic myotomy (POEM) is increasingly utilized to treat patients with achalasia. Early results have demonstrated significant improvement of symptoms, but there are concerns about postoperative reflux. With only limited comparative data available, we sought to compare POEM to laparoscopic Heller myotomy (LHM) with partial fundoplication. This is a retrospective review of 42 POEM and 84 LHM patients undergoing primary myotomy for achalasia. Patients were matched by achalasia type, by Eckardt and dysphagia scores, and by quality of life (QOL) metrics. Analysis at 6-12-month follow-up evaluated these metrics, PPI use, pH, manometric, and endoscopic data. We matched 25 patients with achalasia types I (6), II (13), and III (6). Follow-up was longer for LHM at 158.1 (36.5-272.9) weeks versus 36.2 (22.2-41.2) weeks (p = 0.001). Eckardt scores, QOL metrics, and dysphagia significantly improved in both groups. DeMeester scores and total percent time less than 4 were abnormal in both groups and comparable (p = 0.925 and p = 0.838). Esophagitis was seen in 53.4 % (POEM) and 31.6 % (LHM) (Yates' p = 0.91), and PPI use was equivalent at 36 %. Early clinical outcomes are excellent with POEM and comparable to the standard of care LHM. Long-term follow-up is required as concerns for reflux persist.

  11. Investigations on the metabolism of metals in decapod crustaceas in relation with moulting cycles and reproduction

    International Nuclear Information System (INIS)

    Martin, J.-L.M.

    1975-07-01

    A study of the metabolism of metals was carried out in decapod crustaceas; it showed that it was subject to cyclic variations during the life of the animals, closely correlated with growth moults. The metabolism of metals was also considered in its relations with reproduction, especially oogenesis and spermatogenesis, and embryonic development. In relation with moult, various factors playing a role on metal metabolism were investigated: role of metals in the organism, fasting and nutrition cycles and biochemical reserves, physico-chemical form of the metal and ultrastructure of uptake surfaces. The histological and histochemical aspects of the uptake of a number of metals were studied as well as inter-metallic and inter-organic relationships [fr

  12. Male meiosis in Crustacea: synapsis, recombination, epigenetics and fertility in Daphnia magna.

    Science.gov (United States)

    Gómez, Rocío; Van Damme, Kay; Gosálvez, Jaime; Morán, Eugenio Sánchez; Colbourne, John K

    2016-09-01

    We present the first detailed cytological study of male meiosis in Daphnia (Crustacea: Branchiopoda: Cladocera)-an aquatic microcrustacean with a cyclical parthenogenetic life cycle. Using immunostaining of the testes in Daphnia magna for baseline knowledge, we characterized the different stages of meiotic division and spermiogenesis in relation to the distribution of proteins involved in synapsis, early recombination events and sister chromatid cohesion. We also studied post-translational histone modifications in male spermatocytes, in relation to the dynamic chromatin progression of meiosis. Finally, we applied a DNA fragmentation test to measure sperm quality of D. magna, with respect to levels of inbreeding. As a proxy for fertility, this technique may be used to assess the reproductive health of a sentinel species of aquatic ecosystems. Daphnia proves to be a model species for comparative studies of meiosis that is poised to improve our understanding of the cytological basis of sexual and asexual reproduction.

  13. Ethnotaxonomical Study of Mole Crab (Crustacea:Hippoidea on Coastal Community of Cilacap

    Directory of Open Access Journals (Sweden)

    Dian Bhagawati

    2016-09-01

    Full Text Available Local wisdom is a cultural heritage that needs to be preserved. The Cilacap’s coastal communities have traditional taxonomy knowledge that hasn’t been informed, especially about mole crab. This study aimed to explore the ethnotaxonomy knowledge of sand crabs (Crustacea: Hippoidea in Widarapayung coastal communities. The purposive snowball sampling was used for the method, followed by observation and semi-structured interviews with 30 respondents. Data were analyzed descriptively based on observations and interviews. The results showed that the coastal communities in Widarapayung tourist areas could be divided into five groups, namely catchers, collectors, processors, traders, and consumers. The catcher was able to recognize and describe three types of sand crabs based on the shape of the body and their catchment areas. Captured crabs had the local name of ‘yutuk jambe’ (Emerita emeritus Linnaeus 1767, the appellation was based on carapace shape that resembled the shape of areca fruit; ‘Yutuk bathok’ (Hippa adactyla Fabricius 1787, had the carapace shape resembling a coconut shell, and ‘yutuk Kethek’ (Albunea symmysta Linnaeus 1758, had ornaments on the carapace surface similar with a monkey face, there were dense setae on the edge of the carapace, spiny long antennas and aggressively pinch when captured. The knowledge and skills of sand crabs classification and local name entitlement acquired by the people were in accordance with the Berlin’s model. How to CiteBhagawati, D., Anggoro, S., Zainuri, M. & Sya’rani, L. (2016. Ethnotaxonomical Study of Mole Crab (Crustacea:Hippoidea on Coastal Community of Cilacap. Biosaintifika: Journal of Biology & Biology Education, 8(2, 222-230.

  14. Laparoscopic Heller Myotomy Versus Peroral Endoscopic Myotomy (POEM) for Achalasia: A Systematic Review and Meta-analysis.

    Science.gov (United States)

    Schlottmann, Francisco; Luckett, Daniel J; Fine, Jason; Shaheen, Nicholas J; Patti, Marco G

    2018-03-01

    To compare the outcome of per oral endoscopic myotomy (POEM) and laparoscopic Heller myotomy (LHM) for the treatment of esophageal achalasia. Over the last 2 decades, LHM has become the primary form of treatment in many centers. However, since the first description of POEM in 2010, this technique has widely disseminated, despite the absence of long-term results and randomized trials. A systematic Medline literature search of articles on LHM and POEM for the treatment of achalasia was performed. The main outcomes measured were improvement of dysphagia and posttreatment gastroesophageal reflux disease (GERD). Linear regression was used to model the effect of each procedure on the different outcomes. Fifty-three studies reported data on LHM (5834 patients), and 21 articles examined POEM (1958 patients). Mean follow-up was significantly longer for studies of LHM (41.5 vs. 16.2 mo, P < 0.0001). Predicted probabilities for improvement in dysphagia at 12 months were 93.5% for POEM and 91.0% for LHM (P = 0.01), and at 24 months were 92.7% for POEM and 90.0% for LHM (P = 0.01). Patients undergoing POEM were more likely to develop GERD symptoms (OR 1.69, 95% CI 1.33-2.14, P < 0.0001), GERD evidenced by erosive esophagitis (OR 9.31, 95% CI 4.71-18.85, P < 0.0001), and GERD evidenced by pH monitoring (OR 4.30, 95% CI 2.96-6.27, P < 0.0001). On average, length of hospital stay was 1.03 days longer after POEM (P = 0.04). Short-term results show that POEM is more effective than LHM in relieving dysphagia, but it is associated with a very high incidence of pathologic reflux.

  15. Per-Oral Endoscopic Myotomy Versus Laparoscopic Heller Myotomy for Achalasia: A Meta-Analysis of Nonrandomized Comparative Studies.

    Science.gov (United States)

    Zhang, Yuan; Wang, Hongjuan; Chen, Xingdong; Liu, Lan; Wang, Hongbo; Liu, Bin; Guo, Jianqiang; Jia, Hongying

    2016-02-01

    We aimed to assess the short-term outcomes of per-oral endoscopic myotomy (POEM) compared with laparoscopic Heller myotomy (LHM) for achalasia through a meta-analysis of nonrandomized comparative studies.We searched PubMed, Embase, Medline, Cochrane Library, and Google Scholar for studies that compared POEM and LHM for achalasia and were published between January 1, 2008 and December 31, 2014. The Methodological Index for Nonrandomized Studies (MINORS) was used to evaluate the quality of the studies. Random- and fixed-effects meta-analytical models were used, and between-study heterogeneity was assessed.Four nonrandomized comparative studies that included 317 patients (125 in the POEM group and 192 in the LHM group) met our research criteria and were assessed. There were no differences between the POEM and LHM groups in terms of sex, preoperative Eckhart score, length of myotomy, operation time, length of hospital stay, and complications. The patients in the POEM group were older than those in the LHM group (MD =2.81, 95% CI 0.27-5.35; P = 0.03) with high between-study homogeneity (χ = 1.96, df = 2, I = 0%; P = 0.38). The patients in the POEM group had a lower Eckardt score after surgery compared with those in the LHM group (MD = -0.30, 95% CI -0.42 to -0.18; P < 0.001) with high between-study homogeneity (χ = 0.00, df = 1, I = 0%; P = 1.00).The efficacy and safety of POEM appear to be comparable to those of LHM. Multicenter and randomized trials with larger sample size are needed to further compare the efficacy and safety of POEM and LHM for the treatment of achalasia.

  16. Evaluation of 5.8S rRNA to identify Penaeus semisulcatus and its subspecies, Penaeus semisulcatus persicus (Penaeidae and some Decapoda species

    Directory of Open Access Journals (Sweden)

    Zahra Noroozi

    2015-10-01

    Full Text Available The green tiger prawn, Penaeus semisulcatus is one of the most important members of the family Penaeidae in the Persian Gulf. Based on the morphological characteristics, two groups, including P. semisulcatus and its subspecies viz. P. s. persicus are recognized. This study was conducted to investigate the genetic distance between P. semisulcatus and P. s. persicus by analyzing partial sequence of 5.8S rRNA. Another objective of this study is to evaluate the ability of 5.8S rRNA to identify the species of Decapoda. The results indicated that the 5.8S rRNA gene of both P. semisulcatus and P. s. persicus were exactly identical, and sequence variation was not observed. The results also indicated that 5.8S rRNA sequences between species of the same genus of analysed species of Decapoda are conserved, and no genetic distance was observed in species level. The low evolutionary rate and efficient conservation of the 5.8S rRNA can be attributed to its role in the translation process.

  17. Distribuição larval planctônica de Bachyura (Crustacea, Decapoda) na região de Ubatuba, com novas descrições larvais para o gênero Persephona Leach, 1817

    OpenAIRE

    Hirose, Gustavo Luis [UNESP

    2009-01-01

    Como na maioria dos invertebrados marinhos, os Brachyura possuem em seu ciclo de vida uma fase larval, a qual pode constituir-se em vários estágios (zoeas) antes de tornarem-se competentes para o assentamento. Durante esta fase, as larvas estão expostas às variações ambientais, os quais influenciam suas chances de sobrevivência e desenvolvimento. Entre estes fatores, podemos citar as variáveis físicas e químicas, como a temperatura, salinidade, luz e poluentes; além de alguns fatores biológic...

  18. A new species of fiddler crab from the Ogasawara (Bonin) Islands, Japan, separated from the widely-distributed sister species Uca (Paraleptuca) crassipes (White, 1847) (Crustacea: Decapoda: Brachyura: Ocypodidae).

    Science.gov (United States)

    Shih, Hsi-Te; Komai, Tomoyuki; Liu, Min-Yun

    2013-12-10

    A new species of fiddler crab (Brachyura: Ocypodidae), Uca boninensis sp. nov., is described from the Ogasawara (Bonin) Islands, Japan. The new species has previously been identified with the widely distributed U. crassipes (White, 1847), from which it differs by having a slightly differently shaped carapace, and relatively stouter male first gonopods (G1). The recognition of the new species is also supported by differences in the mitochondrial cytochrome oxidase I (COI) and control region (CR) genes. U. boninensis sp. nov., appears to be endemic to the Ogasawara Islands, and as the only known population is small, urgent conservation measures are needed for its protection. Our study brings the total number of the Japanese fiddler crab species to 12.

  19. Deep-sea squat lobsters of the genus Paramunida Baba, 1988 (Crustacea: Decapoda: Munididae) from north-western Australia: new records and description of three new species.

    Science.gov (United States)

    Mccallum, Anna W; Cabezas, Patricia; Andreakis, Nikos

    2016-10-04

    Six species of Paramunida are reported from the continental margin of north-western Australia. Three species are new to science: Paramunida christinae sp. nov., P. ioannis sp. nov., and P. spiniantennata sp. nov. Two species are reported for the first time from Australian waters, P. evexa Macpherson, 1996 and P. tricarinata (Alcock, 1894). These species were confirmed by molecular evidence from the mitochondrial markers ND1 and 16S. We also examine phylogenetic relationships within the genus, and provide an identification key for all known Paramunida species.

  20. "Symmetrical" hermit crabs of the family Pylochelidae (Crustacea: Decapoda: Anomura) collected by the "BIOPAPUA" and "PAPUA NIUGINI" expeditions in the Papua New Guinea, with descriptions of two new species.

    Science.gov (United States)

    Komai, Tomoyuki; Chan, Tin-Yam

    2016-03-09

    Collections made during the recent expeditions to Papua New Guinea ("BIOPAPUA", 2010; "PAPUA NIUGINI", 2012) yielded a total of 12 species from the "symmetrical" hermit crab family Pylochelidae, including two new to science: Bathycheles incisus (Forest, 1987), B. integer (Forest, 1987), Cheiroplatea laticauda Boas, 1926, C. pumicicola Forest, 1987, C. rotundioculus n. sp., Pylocheles mortensenii Boas, 1926, and Xylocheles macrops (Forest, 1987) (Pylochelinae); Parapylocheles scorpio (Alcock, 1894), Trizocheles manningi Forest, 1987, T. moosai Forest, 1987, T. sakaii Forest, 1987, and T. spinidigitus n. sp. (Trizochelinae). Affinities of the two new species are discussed. Parapylocheles scorpio, Trizocheles manningi and T. sakaii are recorded from the South Pacific for the first time. Revised identification keys to species of Cheiroplatea and Trizocheles are provided.

  1. Photophore counts in the deep-sea commercial shrimp Aristeus alcocki Ramadan, 1938 (Crustacea: Decapoda: Aristeidae), with a revised key to the Indo-West Pacific species of the genus.

    Science.gov (United States)

    Chan, Tin-Yam; Kumar, Appukuttannair Biju; Yang, Chien-Hui

    2017-10-06

    The availability of abundant fresh material of Aristeus alcocki Ramadan, 1938 from India allowed the evaluation of the variation in the numbers of photophores on the pereiopods in this species, as well as other diagnostic characters for species discrimination. Although the pereiopodal photophore counts in A. alcocki largely overlap with those of A. semidentatus Bate, 1888, it is found that A. alcocki is unique in the Indo-West Pacific species of the genus by the lower end of the cervical carina considerably farther away from the branchiostegal carina. Molecular genetic analysis confirmed the distinct taxonomic status of the six currently known species in this genus from the Indo-West Pacific and a revised key is provided for distinguishing them.

  2. Dos nuevas especies de cangrejos del género Neostrengeria Pretzmann, 1965, de Colombia (Crustacea: Decapoda: Pseudothelphusidae, con actualización de la clave de las especies del género

    Directory of Open Access Journals (Sweden)

    MARTHA R. CAMPOS

    2008-12-01

    Full Text Available Se describen dos nuevas especies de Neostrengeria Pretzmann, 1965, N. bataensis, de Santa María, Departamento de Boyacá y N. celioi, de Aguazul, Departamento de Casanare, en la vertiente oriental de los Andes Orientales. Con la adición de las nuevas especies, el número de especies del género se incrementa a 23. Las nuevas especies se diferencian de las otras del género principalmente en la morfología del primer gonopodo del macho, particularmente en la forma de los lóbulos laterales y accesorios, el contorno del ápice, la proyección mesocaudal y el lóbulo mesial. El género Neostrengeria es endémico de Colombia y se distribuye en las dos vertientes y el altiplano de la Cordillera Oriental, en un rango de elevación de 470 a 3000 m. Se presenta una clave para la identificación de las especies basada esencialmente en la morfología del primer gonopodo del macho y de los pereopodos.

  3. Taxonomía, zoogeografía y aspectos ecológicos de los cangrejos ermitaños de la familia Diogenidae (Crustacea: Decapoda: Anomura) del Pacífico mexicano /

    OpenAIRE

    Ayón Parente, Manuel sustentante.

    2009-01-01

     tesis que para obtener el grado de Doctor en Ciencias del Mar y Limnología, presenta Manuel Ayón Parente ; asesor Michel Edmond Hendrickx Reners. 465 páginas : ilustraciones. Doctorado en Ciencias del Mar y Limnología UNAM, Instituto de Ciencias del Mar y Limnología, 2009

  4. Laparoscopic Heller Myotomy for Non-Dilated Esophageal Achalasia in Children with Intraoperative Stepped Dilation Under Image Guidance: Attempting Complete Myotomy.

    Science.gov (United States)

    Miyano, Go; Miyake, Hiromu; Koyama, Mariko; Morita, Keiichi; Kaneshiro, Masakatsu; Nouso, Hiroshi; Yamoto, Masaya; Fukumoto, Koji; Urushihara, Naoto

    2016-05-01

    This study presents a modified surgical approach to laparoscopic myotomy for achalasia using stepped dilation with a Rigiflex balloon and contrast medium under image guidance. A 10-year-old boy with persistent dysphagia and vomiting had ingested only liquids for 3 months, losing >10 kg in body weight. Barium swallow and esophageal manometry diagnosed esophageal achalasia with mild esophageal dilatation. After failed pneumatic dilatation, laparoscopic Heller myotomy with Dor fundoplication was performed. Prior to surgery, a Rigiflex balloon dilator was placed within the esophagus near the diaphragmatic hiatus. A four-port technique was used, and mobilization of the esophagus was limited to the anterior aspect. A 5-cm Heller myotomy was performed, extending another 2 cm onto the anterior gastric wall. During myotomy, the Rigiflex balloon was serially dilated from 30 to 50 mL, and filled with contrast medium under fluoroscopic image guidance in order to maintain appropriate tension on the esophagus to facilitate myotomy, and to confirm adequate myotomy with sufficient release of lower esophageal sphincter by resecting residual circular muscle fibers. Residual circular muscle fibers can be simultaneously visualized under both fluoroscopic image guidance and direct observation through the laparoscope, and they were cut precisely until the residual notch fully disappeared. Dor fundoplication was completed. The operative time was 180 minutes, and oral intake was started after esophagography on postoperative day 1. As of the 12-month follow-up, the patient has not shown any symptoms, and his postoperative course appeared satisfactory.

  5. Seasonal variation of the effect of high-carbohydrate and high-protein diets on the intermediate metabolism of Parastacus brasiliensis (Crustacea, Decapoda, Parastacidae maintained in the laboratory Variações sazonais do efeito de uma dieta rica em carboidrato e rica em proteínas no metabolismo intermediário de Parastacus brasiliensis (Crustacea, Decapoda, Parastacidae mantidos em laboratório

    Directory of Open Access Journals (Sweden)

    Bibiana K. Dutra

    2008-12-01

    Full Text Available The goal of this study was to evaluate the effect of a high-carbohydrate diet (HC and a high-protein diet (HP on the metabolism of the crayfish Parastacus brasiliensis (Von Martens, 1869, collected in different seasons and maintained in the laboratory for 15 days. Crayfish were collected monthly from January 2002 to January 2004 at São Francisco de Paula, Southern Brazil, in Guarapirá stream. In the laboratory, the animals were kept submerged in aquariums under controlled conditions. They were fed ad libitum, for 15 days with either a HC or HP diet. At the end of this period, haemolymph samples were collected, as were hepatopancreas, gills, and abdominal muscle that were removed for determination of glycogen, free glucose, lipids, and triglycerides. The haemolymph samples were used for determination of glucose, proteins, lipids, and triglycerides. Statistical analysis (ANOVA revealed significant seasonal differences in biochemical composition in crayfish maintained on HC or HP diets. Independent of the diets offered to the animals and the controlled conditions for 15 days, the indications of seasonality were unchanged. The observed changes seemed to be related to the reproductive period. Moreover, the HC diet increased all energy reserves in adult parastacids, which may aid in reproduction.O objetivo deste estudo foi avaliar o efeito da dieta rica em carboidratos (HC e da dieta rica em proteínas (HP sobre o metabolismo do Parastacus brasiliensis (Von Martens, 1869 coletados em diferentes estações e mantidos durante 15 dias em laboratório. Os lagostins foram coletados mensalmente de Janeiro de 2002 a Janeiro de 2004 em São Francisco de Paula, Sul do Brasil, no riacho Guarapirá. No laboratório, os animais foram mantidos submersos em aquários sob condições controladas. Eles foram alimentados ad libitum por 15 dias com a dieta HC ou HP. Após o final do período, as amostras de hemolinfa foram coletadas, assim como o hepatopâncreas, as brânquias e o músculo abdominal foram removidos para a determinação do glicogênio, glicose livre, lipídios e triglicerídeos. As amostras de hemolinfa foram usadas para a determinação da glicose, proteínas, lipídios e triglicerídeos. As análises estatísticas (ANOVA revelaram uma diferença sazonal significativa na composição bioquímica nos lagostins mantidos com dieta HC ou HP. Independente da dieta oferecida para os animais e das condições controladas por 15 dias, não foi possível alterar os perfis metabólicos encontrados sazonalmente nos animais em campo. As mudanças observadas parecem estar relacionadas ao período reprodutivo. Além disso, a dieta HC aumentou todas as reservas energéticas nos parastacídeos adultos, o que pode auxiliar na reprodução.

  6. Espécies do gênero Munida Leach (Crustacea, Decapoda, Galatheidae coletadas entre Torres (Rio Grande do Sul, Brasil e Maldonado (Uruguai pelo Programa Rio Grande do Sul (PRS I-II, GEDIP Species of the genus Munida Leach (Crustacea, Decapoda, Galatheidae collected between Torres (Rio Grande do Sul, Brazil and Maldonado (Uruguay, by the Project Rio Grande do Sul (PRS I-II, GEDIP

    Directory of Open Access Journals (Sweden)

    Gustavo A.S. de Melo-Filho

    2001-12-01

    Full Text Available The project PRS-GEDIP was carried out in the Rio Grande do Sul coast, with some few stations off Maldonado (Uruguay, by means of a convention between Instituto Oceanográfico USP (IOUSP and the Grupo Executivo do Desenvolvimento da Indústria da Pesca (GEDIP of Rio Grande do Sul. The purpose of this project was the acquisition of data in order to have a better biotic and abiotic characterization of the southern Brazilian coast. Among the Galatheidae, about 1200 specimens of the genus Munida Leach, 1820 were collected, including five species as follows: Munida flinti Benedict, 1902; M. forceps A. Milne Edwards, 1880; M. iris A. Milne Edwards, 1880; M. irrasa A. Milne Edwards. 1880 and M. longipes A. Milne Edwards, 1880. The description, material examined, remarks and maps of the stations where each species was collected are done.

  7. Uranium concentration by Crustacea: a structural, ultrastructural and microanalytical study by secondary ion emission and electron probe X ray microanalysis

    International Nuclear Information System (INIS)

    Chassard-Bouchaud, Colette

    1982-01-01

    Experimental intoxications were performed on the Crayfish Pontastacus leptodactylus using hydrosoluble uranium nitrate. Investigations demonstrate that Crustacea are able to concentrate both uranium main radioactive isotopes 238 U and 235 U within the cuticle, gill epithelium, midgut gland (=hepatopancreas) and macrophagic hemocytes. The storage occurs within nucleus and lysosomal system where uranium is precipitated in the form of an unsoluble phosphate. The proposed hypothesis for the metal extrusion is the following: residual bodies containing the uranium precipitates are extruded into the extracellular space where they are absorbed by phagocytosis, by the macrophagic hemocytes [fr

  8. Cost-effectiveness of per oral endoscopic myotomy relative to laparoscopic Heller myotomy for the treatment of achalasia.

    Science.gov (United States)

    Greenleaf, Erin K; Winder, Joshua S; Hollenbeak, Christopher S; Haluck, Randy S; Mathew, Abraham; Pauli, Eric M

    2018-01-01

    Per oral endoscopic myotomy (POEM) has recently emerged as a viable option relative to the classic approach of laparoscopic Heller myotomy (LHM) for the treatment of esophageal achalasia. In this cost-utility analysis of POEM and LHM, we hypothesized that POEM would be cost-effective relative to LHM. A stochastic cost-utility analysis of treatment for achalasia was performed to determine the cost-effectiveness of POEM relative to LHM. Costs were estimated from the provider perspective and obtained from our institution's cost-accounting database. The measure of effectiveness was quality-adjusted life years (QALYs) which were estimated from direct elicitation of utility using a visual analog scale. The primary outcome was the incremental cost-effectiveness ratio (ICER). Uncertainty was assessed by bootstrapping the sample and computing the cost-effectiveness acceptability curve (CEAC). Patients treated within an 11-year period (2004-2016) were recruited for participation (20 POEM, 21 LHM). During the index admission, the mean costs for POEM ($8630 ± $2653) and the mean costs for LHM ($7604 ± $2091) were not significantly different (P = 0.179). Additionally, mean QALYs for POEM (0.413 ± 0.248) were higher than that associated with LHM (0.357 ± 0.338), but this difference was also not statistically significant (P = 0.55). The ICER suggested that it would cost an additional $18,536 for each QALY gained using POEM. There was substantial uncertainty in the ICER; there was a 48.25% probability that POEM was cost-effective at the mean ICER. At a willingness-to-pay threshold of $100,000, there was a 68.31% probability that POEM was cost-effective relative to LHM. In the treatment of achalasia, POEM appears to be cost-effective relative to LHM depending on one's willingness-to-pay for an additional QALY.

  9. Long-term results of the Heller-Dor operation with intraoperative manometry for the treatment of esophageal achalasia.

    Science.gov (United States)

    Mattioli, Sandro; Ruffato, Alberto; Lugaresi, Marialuisa; Pilotti, Vladimiro; Aramini, Beatrice; D'Ovidio, Frank

    2010-11-01

    Quality of outcome of the Heller-Dor operation is sometimes different between studies, likely because of technical reasons. We analyze the details of myotomy and fundoplication in relation to the results achieved over a 30-year single center's experience. From 1979-2008, a long esophagogastric myotomy and a partial anterior fundoplication to protect the surface of the myotomy was routinely performed with intraoperative manometry in 202 patients (97 men; median age, 55.5 years; interquartile range, 43.7-71 years) through a laparotomy and in 60 patients (24 men; median age, 46 years; interquartile range, 36.2-63 years) through a laparoscopy. The follow-up consisted of periodical interview, endoscopy, and barium swallow, and a semiquantitative scale was used to grade results. Mortality was 1 of 202 in the laparotomy group and 0 of 60 in the laparoscopy group. Median follow-up was 96 months (interquartile range, 48-190.5 months) in the laparotomy group and 48 months (interquartile range, 27-69.5 months) in the laparoscopy group. At intraoperative manometry, complete abolition of the high-pressure zone was obtained in 100%. The Dor-related high-pressure zone length and mean pressure were 4.5 ± 0.4 cm and 13.3 ± 2.2 mm Hg in the laparotomy group and 4.5 ± 0.5 cm and 13.2 ± 2.2 mm Hg in the laparoscopy group (P = .75). In the laparotomy group poor results (19/201 [9.5%]) were secondary to esophagitis in 15 (7.5%) of 201 patients (in 2 patients after 184 and 252 months, respectively) and to recurrent dysphagia in 4 (2%) of 201 patients, all with end-stage sigmoid achalasia. In the laparoscopy group 2 (3.3%) of 60 had esophagitis. A long esophagogastric myotomy protected by means of Dor fundoplication cures or substantially reduces dysphagia in the great majority of patients affected by esophageal achalasia and effectively controls postoperative esophagitis. Intraoperative manometry is likely the key factor for achieving the reported results. Copyright © 2010 The

  10. Species diversity and phylogeographical affinities of the Branchiopoda (Crustacea) of Churchill, Manitoba, Canada.

    Science.gov (United States)

    Jeffery, Nicholas W; Elías-Gutiérrez, Manuel; Adamowicz, Sarah J

    2011-01-01

    The region of Churchill, Manitoba, contains a wide variety of habitats representative of both the boreal forest and arctic tundra and has been used as a model site for biodiversity studies for nearly seven decades within Canada. Much previous work has been done in Churchill to study the Daphnia pulex species complex in particular, but no study has completed a wide-scale survey on the crustacean species that inhabit Churchill's aquatic ecosystems using molecular markers. We have employed DNA barcoding to study the diversity of the Branchiopoda (Crustacea) in a wide variety of freshwater habitats and to determine the likely origins of the Churchill fauna following the last glaciation. The standard animal barcode marker (COI) was sequenced for 327 specimens, and a 3% divergence threshold was used to delineate potential species. We found 42 provisional and valid branchiopod species from this survey alone, including several cryptic lineages, in comparison with the 25 previously recorded from previous ecological works. Using published sequence data, we explored the phylogeographic affinities of Churchill's branchiopods, finding that the Churchill fauna apparently originated from all directions from multiple glacial refugia (including southern, Beringian, and high arctic regions). Overall, these microcrustaceans are very diverse in Churchill and contain multiple species complexes. The present study introduces among the first sequences for some understudied genera, for which further work is required to delineate species boundaries and develop a more complete understanding of branchiopod diversity over a larger spatial scale.

  11. The Hyalella (Crustacea: Amphipoda) species cloud of the ancient Lake Titicaca originated from multiple colonizations.

    Science.gov (United States)

    Adamowicz, Sarah J; Marinone, María Cristina; Menu-Marque, Silvina; Martin, Jeffrey W; Allen, Daniel C; Pyle, Michelle N; De Los Ríos, Patricio; Sobel, Crystal N; Ibañez, Carla; Pinto, Julio; Witt, Jonathan D S

    2018-08-01

    Ancient lakes are renowned for their exceptional diversity of endemic species. As model systems for the study of sympatric speciation, it is necessary to understand whether a given hypothesized species flock is of monophyletic or polyphyletic origin. Here, we present the first molecular characterization of the Hyalella (Crustacea: Amphipoda) species complex of Lake Titicaca, using COI and 28S DNA sequences, including samples from the connected Small and Large Lakes that comprise Lake Titicaca as well as from a broader survey of southern South American sites. At least five evolutionarily distant lineages are present within Lake Titicaca, which were estimated to have diverged from one another 12-20 MYA. These major lineages are dispersed throughout the broader South American Hyalella phylogeny, with each lineage representing at least one independent colonization of the lake. Moreover, complex genetic relationships are revealed between Lake Titicaca individuals and those from surrounding water bodies, which may be explained by repeated dispersal into and out of the lake, combined with parallel intralacustrine diversification within two separate clades. Although further work in deeper waters will be required to determine the number of species present and modes of diversification, our results strongly indicate that this amphipod species cloud is polyphyletic with a complex geographic history. Copyright © 2018 Elsevier Inc. All rights reserved.

  12. Studies on transfer and accumulation of 106Ru from seaweed to fish through crustacea, 2

    International Nuclear Information System (INIS)

    Izumo, Yoshiro

    1982-01-01

    This paper deals with transfer and accumulation of 106 Ru in a model of the graizing food chain of marine organisms: the radioactive sea water → seaweed (Chondrus crispus) → crustacea (prawn, Palaemon serratus) → fish (plaice, Pleuronectes platessa). The seaweeds were cultured in the radioactive sea waters A (filtrated and circulated through sandy mud, the radioactive concentration decreased and atteined to constant after addition of 106 Ru), B (not filtrated and circulated, the radioactive concentration decreased and atteined to constant) and C (not filtrated and circulated, the radioactive concentration decreased, but did not attein to constant), respectively, and investigated accumulations of 106 Ru. Thereafter, accumulations of 106 Ru in prawns and plaice by the ingestions of their diets (the seaweeds contaminated with 106 Ru in each water and the meats of prawns accumulated 106 Ru from each diet, respectively), were investigated and compared with those from the radioactive sea waters reported previously. It was shown that 106 Ru would be accumulated by the prawns from the sea water A about 3 times higher than from the contaminated diet in this water, however from the contaminated diets in the waters B and C about 2 times, respectively, higher than from each water. While, accumulations of 106 Ru by the plaice from each diet were negligible in comparison with those from each water. No higher concentrations of 106 Ru were observed in these organisms from lower to higher in the trophic level. (author)

  13. Paleocene decapod Crustacea from northeastern Mexico: Additions to biostratigraphy and diversity

    Science.gov (United States)

    Martínez-Díaz, José Luis; Aguillón-Martínez, Martha Carolina; Luque, Javier; Vega, Francisco J.

    2017-03-01

    New decapod specimens from mid-Paleocene shallow marine deposits of NE Mexico represents an important addition to the diversity, paleobiogeography and evolution of the Crustacea record. In this work, we describe additions to the decapod assemblage from the Paleocene (Selandian) Rancho Nuevo Formation (Difunta Group, Parras Basin, Coahuila). Due to the evident size differences with other decapod assemblages, we compare the new assemblage with those from the Lower Paleocene (Danian) Mexia Clay Member of the Wills Point Formation, Texas, and the Lower Eocene (Ypresian) El Bosque Formation in Chiapas. Species reported from the mid-Paleocene (Selandian) assemblage of the Porters Creek Formation (Alabama), are correlatable to the decapod species from NE Mexico in age, size and systematic composition. The erymid lobster Enoploclytia gardnerae (Rathbun, 1935) is represented by several carapaces and chelae remains. One isolated palm of Callianassidae is included. Numerous carapaces of Linuparus wilcoxensis Rathbun, 1935 are described, representing the most abundant lobster. A new record for the raninid Notopoides sp., and presence of Quasilaeviranina sp. cf. arzignagnensis and Quasilaeviranina ovalis are here reported. New raninids, Claudioranina latacantha sp. nov. and Claudioranina sp. (Cyrtorhininae) are also part of this assemblage. Paraverrucoides alabamensis (Rathbun, 1935), and Tehuacana americana (Rathbun, 1935) are represented by several carapaces exhibiting intraspecific morphological variation. Different sizes among the Early and Middle Paleocene and Early Eocene decapod populations suggests a possible effect of variation in seawater temperatures and/or a Lilliput effect after the K/Pg event.

  14. Aspectos reprodutivos do caranguejo Aratus pisonii (H. Milne Edwards (Crustácea, Decapoda, Grapsidae do manguezal de Itacuruçá, Rio de Janeiro, Brasil Reproductive aspects of crab Aratus pisonii (H. Milne Edwards (Crustacea, Decapoda, Grapsidae in Itacurucá's mangrove

    Directory of Open Access Journals (Sweden)

    Cristiane Ferreira Nicolau

    2002-12-01

    Full Text Available The objective of this work has to get knowledge about the reproductive aspect of the tree crab Aratus pisonii (H. Milne Edwards, 1837. The sampling were made monthly from April, 2000 to April, 2001, in the Itacurucá's mangrove (22º54'S and 43º33'W, Rio de Janeiro. The crabs were collected handly, using an effort of 50 minutes with three collectors. In laboratory, the specimens were separated by sex and had measured the carapace width and lenght. The ovigerous females were separated and the mass of eggs was removed for a mensurament of size and count of eggs. Afterwards, the animals were conservad in 70% alcohol. A total of 783 individuals were caught among 59% males and 41% females among these 8% were ovigerous. The ovigerous females were found almost during the whole year, except in the winter showing major plenty on February and March, demonstrating the reproductive period. The ovigerous females presented size between 14.0 and 23.6 mm of carapace width and the average fecundity estimated to the specie was 9081 ± 3684 eggs. The mean size of the eggs was 0.27 mm varied from 0.24 to 0.29 mm and the size at onset of egg production was verified from 13.1 to 15.0 mm of the carapace width.

  15. Aspectos da reprodução do caranguejo guaiamum, Cardisoma guanhumi Latreille (Crustácea, Decapoda, Gecarcinidae da Baía de Sepetiba, Rio de Janeiro, Brasil The reproductive aspects of the "guaiamum" crabs, Cardisoma guanhumi Latreille (Crustacea, Decapoda, Gecarcinidae at the Sepetiba Bay mangrove, Rio de Janeiro, Brazil

    Directory of Open Access Journals (Sweden)

    Rejane da Silva

    2002-12-01

    Full Text Available The objective of this work is to get knowledge about the "guaiamum" crabs reproduction. Two hundred and twenty four crabs were caught from August'96 to July'97. Their sex carapace color and morphometric data were obtained. The stages of gonadal development were macroscopically determined and the eggs diameter was measured. Three colors patters for the carapace for males, and four patters for females. Five stages of gonadal development were observed in female crabs, and two stages were observed for males. The first sexual maturity was estimated 53,0 mm carapace width for the females and 52,0 mm for the males. The ovigerous females occurred from March to May. The individual fecundity varied from 103.300 to 366.400 eggs. The eggs mean diameter was 0,39 mm.

  16. Distribución, abundancia y estructura poblacional del langostino rojo de profundidad Haliporoides diomedeae (Crustácea: Decapoda: Solenoceridae frente a la zona norte de Perú (2007-2008 Distribution, abundance, and population structure of deep red shrimp Haliporoides diomedeae (Crustacea: Decapoda: Solenoceridae off northern Peru (2007-2008

    Directory of Open Access Journals (Sweden)

    Edward Barriga

    2009-01-01

    Full Text Available Se determinó la distribución, abundancia relativa y estructura poblacional de Haliporoides diomedeae frente a la zona norte de Perú (3°30'S-10°00'S, con los resultados de dos cruceros desarrollados en 2007 y 2008 a bordo del B/O Miguel Oliver, que realizó investigaciones de la fauna bentodemersal entre 200 y 1.500 m de profundidad, mediante un muestreo al azar estratificado de arrastre de fondo. En 122 lances realizados en cuatro sectores y tres estratos se capturó un total de 48.056 kg, compuestos por ~347 especies de peces e invertebrados. H. diomedeae fue la especie de langostino más importante en las capturas (411 kg, con los mayores niveles de abundancia entre 600 y 1.600 m al norte de los 7°S, con valores medios de captura por unidad de área (CPUA entre 83,4 y 211 kg km-2 y una biomasa total estimada de 1.139,74 ton (± 245,6 ton. Las hembras presentaron una longitud cefalotorácica media de 40,6 mm, rango de 14,5 y 74,5 mm y grupo modal dominante de 30 mm, mientras que en los machos la media fue de 30,6 mm, rango 16 a 33 mm y grupo modal principal de 27 mm; para ambos sexos se identificaron seis grupos modales, dimorfismo sexual y gradiente batimétrica. La relación talla-peso fue de tipo alométrico. En general, las características de distribución, abundancia y estructura poblacional de H. diomedeae permiten considerarla como una especie potencialmente explotable en el norte del mar peruano.The distribution, relative abundance, and population structure of Haliporoides diomedeae was determined off northern Peru (3°30'S-10°00'S by analyzing data from two cruises carried out in 2007 and 2008 on board the B/O Miguel Oliver to assess the bentho-demersal fauna between 200 and 1,500 m depth, us-ing a stratified random bottom trawl design. The total catch from the 122 hauls (covering four sectors and three strata was 48,056 kg, with ~347 fish and invertebrate species. H. diomedeae was the most important shrimp in the catches (411 kg, with the highest abundance levéis between 600 and 1,600 m depth north of 7°00'S. The mean catch per unit área (CPUA was between 83.4 and 211 kg km" . The total biomass was esti-mated to be 1,139.74 ton (± 245.6 ton. The mean carapace length of the females was 40.6 mm, with a range of 14.5 to 74.5 mm and a main modal group of 30 mm; the mean carapace length of the males was 30.6 mm, with a range of 16 to 63 mm and a main modal group of 27 mm. Males and females showed six modal groups, sexual dimorphism, and a bathymetric gradient. The length-weight relationship was allometric. Given the distribution, abundance, and size structure oíH. diomedeae off the northern Peruvian coast, it can be considered a potentially exploitable species inthe sea off northern Peru.

  17. Analysis of the relationship between relative abundance of mature, impregnated females of Pleoticus muelleri (Bate, 1888 (Crustacea, Decapoda and environmental variables through statistical models Análisis de la relación entre la abundancia relativa de las hembras maduras e impregnadas de Pleoticus muelleri (Bate, 1888 (Crustácea, Decapoda y las variables ambientales aplicando modelos estadísticos

    Directory of Open Access Journals (Sweden)

    Mónica Fernández

    2011-01-01

    Full Text Available The relationship between the relative abundance of mature and impregnated females of the Argentine red shrimp Pleoticus muelleri (Bate 1888 and environmental variables was analyzed using statistical methods. Analyzed data carne from the research cruises of the Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP carned out durmg January 2000, 2001, 2005, and 2007; March 2006; and November 2004, 2005, and 2006 in San Jorge Gulf (Argentina. The biological variables considered were the relative abundances of mature and impregnated female shrimp, whereas the environmental variables corresponded to depth, bottom water temperature and salinity, and the difference between surface and bottom water temperature and salinity. Generalized additive models were used as an exploratory tool for the numerical data and the general linear models as a confirmatory tool. The results showed that the distributions and abundances of mature and impregnated females were related to the bottom water temperature and salinity and to depth. The relationship increased along with temperature; with salinity, however, it decreased for mature females and increased for impregnated females. An optimal depth range was evidenced, where the largest concentrations of these individuáis were located.Se presenta el análisis de la relación entre la abundancia relativa de las hembras maduras e impregnadas del langostino Pleoticus muelleri (Bate, 1888 y las variables ambientales, mediante la aplicación de modelos estadísticos. Los datos analizados provienen de las campañas de investigación del Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP realizadas en enero de 2000, 2001, 2005 y 2007, marzo de 2006 y noviembre de 2004, 2005 y 2006 en el Golfo San Jorge (Argentina. Se consideraron las variables biológicas: abundancia relativa de hembras maduras y de hembras impregnadas de langostino y las variables ambientales: profundidad, temperatura y salinidad del agua de fondo así como, la diferencia de temperatura y de salinidad entre el agua de superficie y de fondo. Para el tratamiento numérico de los datos se aplicaron Modelos Aditivos Generalizados como herramienta exploratoria y Modelos Lineales Generales como herramienta confirmatoria. Los resultados indican que la distribución y abundancia de las hembras maduras e impregnadas se relacionan con la temperatura y la salinidad del agua de fondo, y con la profundidad. Con la temperatura se destaca una relación creciente; mientras que con la salinidad, una relación decreciente con las hembras maduras y una relación creciente con las hembras impregnadas. Considerando la profundidad, se evidenció un rango óptimo donde se localizaron las mayores concentraciones de estos individuos.

  18. Crecimiento del cangrejo Callinectes danae (Decapoda: Portunidae de la Isla de Margarita, Venezuela

    Directory of Open Access Journals (Sweden)

    Jesylén Castillo

    2011-12-01

    Full Text Available Las especies del género Callinectes sostienen pesquerías importantes en varias partes del mundo. En el occidente de Venezuela, Callinectes sapidus es capturado con palangre y sostiene una pesquería artesanal importante en el Lago de Maracaibo; mientras que en la Isla de Margarita, Callinectes danae es capturado con nasa en zonas cercanas a lagunas costeras y su pesca está limitada por la oferta y la demanda. Estos recursos son de considerable importancia económica entre los crustáceos comestibles; sin embargo, pocos estudios han sido reportados sobre la dinámica poblacional y potencialidad pesquera en ambientes costeros de Venezuela que contribuyan a la toma de decisiones en la administración pesquera. En este documento se presenta información de los parámetros de crecimiento del cangrejo Callinectes danae Smith, 1869, con el fin de obtener un conocimiento detallado del patrón de crecimiento y lograr estimaciones más precisas sobre el tamaño de la población y su disponibilidad para la explotación. Se analizó una muestra constituida por 3 623 ejemplares capturados con nasa cangrejera por la flota artesanal, entre octubre 2007 y septiembre 2008. Se estableció la relación longitud-peso y se estimaron los parámetros de crecimiento de las curvas en longitud y peso del modelo de von Bertalanffy. La proporción sexual global mostró que no existe diferencia significativa entre machos y hembras (χ2=0.04, p>0.05. Los valores de las pendientes b entre machos y hembras presentaron diferencias significativas (ts=2.75, pDana Swimming crab growth Callinectes danae (Decapoda: Portunidae from Margarita Island, Venezuela. Callinectes danae is a common species captured with crab traps in nearby areas of coastal lagoons in Margarita Island. Although its considerable economic importance as a fishery resource, few studies have been done on population dynamics and its fishery potential in local coastal environments to support decision making in

  19. Systematic Review and Meta-Analysis of Perioperative Outcomes of Peroral Endoscopic Myotomy (POEM) and Laparoscopic Heller Myotomy (LHM) for Achalasia.

    Science.gov (United States)

    Awaiz, Aiman; Yunus, Rossita M; Khan, Shahjahan; Memon, Breda; Memon, Muhammed A

    2017-06-01

    Laparoscopic Heller myotomy (LHM) is the preferred surgical method for treating achalasia. However, peroral endoscopic myotomy (POEM) is providing good short-term results. The objective of this systematic review and meta-analysis was to compare the safety and efficacy of LHM and POEM. A search of PubMed, Cochrane database, Medline, Embase, Science Citation Index, and current contents for English-language articles comparing LHM and POEM between 2007 and 2016 was performed. Variables analyzed included prior endoscopic treatment, prior medical treatment, prior Heller myotomy, operative time, overall complications rate, postoperative gastroesophageal reflux disease (GERD), length of hospital stay, postoperative pain score, and long-term GERD. Seven trials consisting of 483 (LHM=250, POEM=233) patients were analyzed. Preoperative variables, for example, prior endoscopic treatment [odds ratio (OR), 1.32; 95% confidence interval (CI), 0.23-4.61; P=0.96], prior medical treatment [weighted mean difference (WMD), 1.22; 95% CI, 0.52-2.88; P=0.65], and prior Heller myotomy (WMD, 0.47; 95% CI, 0.13-1.67; P=0.25) were comparable. Operative time was 26.28 minutes, nonsignificantly longer for LHM (WMD, 26.28; 95% CI, -11.20 to 63.70; P=0.17). There was a comparable overall complication rate (OR, 1.25; 95% CI, 0.56-2.77; P=0.59), postoperative GERD rate (OR, 1.27; 95% CI, 0.70-2.30; P=0.44), length of hospital stay (WMD, 0.30; 95% CI, -0.24 to 0.85; P=0.28), postoperative pain score (WMD, -0.26; 95% CI, -1.58 to 1.06; P=0.70), and long-term GERD (WMD, 1.06; 95% CI, 0.27-4.1; P=0.08) for both procedures. There was a significantly higher short-term clinical treatment failure rate for LHM (OR, 9.82; 95% CI, 2.06-46.80; P<0.01). POEM compares favorably to LHM for achalasia treatment in short-term perioperative outcomes. However, there was a significantly higher clinical treatment failure rate for LHM on short-term postoperative follow-up. Presently long-term postoperative follow

  20. Effects of gamma irradiation on the emergence of larvae of curculio sikkimensis (Heller) (Coleoptera: Curculionidae) and Cydia kurokoi (Amsel) (Lepidoptera: Tortricidae)

    International Nuclear Information System (INIS)

    Imamura, Taro; Todoriki, Setsuko; Miyanoshita, Akihiro; Hayashi, Toru

    2004-01-01

    The effects of gamma irradiation on the emergence of larvae of the chestnut weevil, Curculio sikkimensis (Heller), were investigated. One hundred chestnuts were irradiated in a 60 Co irradiator (Gammacell 220, Nordion, Canada) at a dose rate of 0.40 kGy/h. The doses at which irradiation was carried out were 50, 100, 200, 300, 400, 500 and 1000 Gy. After treatment, the chestnuts were kept at 25degC, 70% RH and emerged larvae were counted daily. Larvae of the nut fruit moth, Cydia kurokoi (Amsel), also emerged from the chestnuts. The data on the chestnut weevil were subjected to probit analysis and the LD 99.9 of weevil larvae was estimated to be about 500 Gy. (author)

  1. Necrose da mucosa esofágica como complicação da cardiomiotomia à heller para tratamento de megaesôfago chagásico

    Directory of Open Access Journals (Sweden)

    Nádia Barbosa Aires

    Full Text Available This article presents a complication of the laparoscopic technique for Heller cardiomyotomy and anterior fundoplication. This procedure is safe and provides excellent relief of disphagia in esophageal achalasia. Nevertheless, there are rare but dangerous complications, such as late active digestive bleeding, presented in this paper which was resistant to conservative treatment and led to hypovolemic shock. Urgent laparotomy performed to identify and control bleeding, revealed necrosis of esophageal mucosa with a bleeding gastric vessel. Inadequate exposure of the gastroesophageal junction and an incision very close to the lesser curvature might have damaged the esophageal branches of the left gastric artery, leading to ischemic necrosis of the mucosa and exposure of the gastric wall and its vessels.

  2. A review of Epipenaeon ingens Nobili, 1906 (Isopoda: Bopyridae) host species and documentation of a new host, Metapenaeopsis stridulans (Alcock, 1905) (Decapoda: Penaeidae)

    Science.gov (United States)

    Rajkumar, M.; Manokaran, S.; Sun, Jun; Trilles, J. P.

    2011-01-01

    We collected 3 596 Metapenaeopsis stridulans (Decapoda: Penaeidae) from the southeast coast of India between January and December 2007. Sixty three specimens (43 females and 18 males) were parasitized by the bopyrid isopod Epipenaeon ingens (Isopoda: Bopyridae). This is the first report of the occurrence of E. ingens in this host; therefore, it was considered as a new host record. The highest level of infestation (3.2%) occurred in October 2007, coincident with observations of gravid females (9). The total prevalence and presence of gravid females were 17.46% and 28%, respectively. Infestation caused a characteristic bulge of the branchial chamber, growth retardation, and degeneration of the sex organs, but had no effect on the host weight.

  3. Biopolíticas da saúde: reflexões a partir de Michel Foucault, Agnes Heller e Hannah Arendt

    Directory of Open Access Journals (Sweden)

    Francisco Ortega

    Full Text Available O objetivo deste artigo é oferecer ferramentas conceituais que possam ajudar na reflexão acerca da questão das biopolíticas da saúde a partir da obra de Michel Foucault, Agnes Heller e Hannah Arendt. Para Foucault, desde o século XVIII, a vida biológica e a saúde da nação tornaram-se alvos fundamentais de um poder sobre a vida que enfatizava especialmente as noções de sexualidade, raça e degenerescência, cujo objetivo era a otimização da qualidade biológica das populações. Para Arendt, esse movimento de politização da vida é profundamente antipolítico. A vida passa a ocupar o vazio deixado pela decomposição do âmbito público. No caso de Agnes Heller, o antipolitismo do discurso biopolítico se manifesta na procura constante de legitimação quase científica. O pensamento de raça, gênero, saúde é um pensamento científico imitado que substitui a opinião pela verdade. Se a política é o campo do confronto das opiniões, do diálogo, da iniciativa, do novo, da espontaneidade e da ação em liberdade, o pensamento biopolítico legitimado cientificamente é o espaço da verdade, da certeza, da necessidade, do determinismo e da causalidade, no qual o diálogo é substituído por uma política da autoclausura, de amigos e inimigos, e a pluralidade de opiniões é reduzida a uma única opinião politicamente correta.

  4. Biopolíticas da saúde: reflexões a partir de Michel Foucault, Agnes Heller e Hannah Arendt

    Directory of Open Access Journals (Sweden)

    Francisco Ortega

    2004-02-01

    Full Text Available O objetivo deste artigo é oferecer ferramentas conceituais que possam ajudar na reflexão acerca da questão das biopolíticas da saúde a partir da obra de Michel Foucault, Agnes Heller e Hannah Arendt. Para Foucault, desde o século XVIII, a vida biológica e a saúde da nação tornaram-se alvos fundamentais de um poder sobre a vida que enfatizava especialmente as noções de sexualidade, raça e degenerescência, cujo objetivo era a otimização da qualidade biológica das populações. Para Arendt, esse movimento de politização da vida é profundamente antipolítico. A vida passa a ocupar o vazio deixado pela decomposição do âmbito público. No caso de Agnes Heller, o antipolitismo do discurso biopolítico se manifesta na procura constante de legitimação quase científica. O pensamento de raça, gênero, saúde é um pensamento científico imitado que substitui a opinião pela verdade. Se a política é o campo do confronto das opiniões, do diálogo, da iniciativa, do novo, da espontaneidade e da ação em liberdade, o pensamento biopolítico legitimado cientificamente é o espaço da verdade, da certeza, da necessidade, do determinismo e da causalidade, no qual o diálogo é substituído por uma política da autoclausura, de amigos e inimigos, e a pluralidade de opiniões é reduzida a uma única opinião politicamente correta.

  5. Reduced postoperative pain scores and narcotic use favor per-oral endoscopic myotomy over laparoscopic Heller myotomy.

    Science.gov (United States)

    Docimo, Salvatore; Mathew, Abraham; Shope, Alexander J; Winder, Joshua S; Haluck, Randy S; Pauli, Eric M

    2017-02-01

    Per-oral endoscopic myotomy (POEM) is a less invasive therapy for achalasia with a shorter hospitalization but with similar short- and long-term outcomes as a laparoscopic Heller myotomy (LHM). Previous literature comparing POEM to LHM has focused primarily on postoperative outcome parameters such as complications, dysphagia scores and gastro-esophageal reflux severity. This study specifically compares postoperative pain following POEM to pain following LHM, the current gold-standard operation. A retrospective review of all patients undergoing POEM or LHM for achalasia was performed from 2006 to 2015. Data collection included demographics, comorbidities, length of stay (LOS) and pain scores (arrival to the recovery room, 1 h postoperative, average first 24 h and upon discharge). Statistical analysis was performed using Student's t test and Chi-square test. Forty-four POEM patients and 122 LHM patients were identified. The average age (52.2 ± 20.75 vs 50.9 ± 17.89 years, p = 0.306) and BMI (28.1 ± 7.62 vs 27.6 ± 7.07 kg/m 2 , p = 0.824) did not differ between the POEM and LHM groups, respectively; however, the American Society of Anesthesiology scores were higher in the POEM patients (2.43 ± 0.62 vs 2.11 ± 0.71, p = 0.011). There were no differences in rates of smoking, diabetes, cardiac disease or pulmonary disease. The average pain scores upon arrival to the recovery room and 1 h postoperatively were lower in the POEM group (2.3 ± 3.014 vs 3.61 ± 3 0.418, p = 0.025 and 2.2 ± 2.579 vs 3.46 ± 3.063, p = 0.034, respectively). There was no difference in the average pain score over the first 24 h (2.7 ± 2.067 vs 3.29 ± 1.980, p = 0.472) or at the time of discharge (1.6 ± 2.420 vs 2.09 ± 2.157, p = 0.0657) between the POEM and LHM groups. After standardizing opioid administration against 10 mg of oral morphine, the POEM group used significantly less narcotics that the LHM group (35.8 vs 101.8 mg, p < 0

  6. Pattern of esophageal eosinophilic infiltration in patients with achalasia and response to Heller myotomy and Dor fundoplication.

    Science.gov (United States)

    Cools-Lartigue, J; Chang, S-Y; Mckendy, K; Mayrand, S; Marcus, V; Fried, G M; Ferri, L E

    2013-01-01

    Eosinophilic esophagitis (EoE) is now recognized as a common cause of dysphagia. Eosinophilic infiltration of the esophagus has also been associated with other conditions, such as gastroesophageal reflux disease (GERD); however, the incidence, pattern, and clinical significance of eosinophilic infiltration in achalasia are poorly documented. We sought to characterize this histological finding in patients undergoing Heller myotomy (HM) for achalasia. Ninety-six patients undergoing laparoscopic HM for primary achalasia between 1999 and 2008 were identified from a prospective database. Serial mid and distal per-endoscopic esophageal biopsies taken from patients before and after surgery were assessed for the presence of elevated intraepithelial eosinophils (EIEs). Slides from patients with reports suggestive of EIE were reviewed independently by two pathologists, and the highest eosinophil count/high-power field (eos/hpf) was recorded. Dysphagia scores (0 = none to 5 = severe dysphagia), GERD health-related quality of life scores (0 = best to 45 = worst), and 24-hour pH results were compared before and 3 months after surgery. We related the highest eos to the symptoms and response to HM. Data are presented as median (range). Paired t-test and Wilcoxon signed-rank test determined significance, *P < 0.05. Of 96 patients with achalasia, 50 had undergone pre-HM biopsies revealing EIE in 17/50 (34%), with a median of 3 eos/hpf (1-21). Two patients were found to have superimposed esophageal candidiasis. One patient met the pathologic criteria for EoE. Twenty-five of 50 (50%) postoperative biopsies demonstrated a median of 5 eos/hpf (1-62) for a total of 28/50 patients (56%) with EIE in either the preoperative or postoperative period. Four patients (8%) met the pathologic criteria for EoE, and two demonstrated persistent esophageal candidiasis. A decrease in eosinophils was found in 6/28 patients (21%) from 3/hpf (1-21) to 0.5/hpf (0-4). Increase in eosinophils was found in

  7. Life and work of Dr. Johannes Govertus de Man (1850-1930)

    NARCIS (Netherlands)

    Karssen, G.

    2006-01-01

    This book describes the life and work of Dr. Johannes Govertus de Man (1850-1930), a remarkable Dutch invertebrate zoologist. J.G. de Man worked on the systematics of both the Crustacea, in particular on Decapoda (i.e. crabs, crayfish, lobsters and shrimps), and the microscopically Nematoda or

  8. Functional adaptation of crustacean exoskeletal elements through structural and compositional diversity: a combined experimental and theoretical study

    Czech Academy of Sciences Publication Activity Database

    Fabritius, H.; Ziegler, A.; Friák, Martin; Nikolov, S.; Huber, J.; Seidl, B.H.M.; Ruangchai, S.; Alagboso, F.; Karsten, S.; Lu, J.; Janus, A.M.; Petrov, M.; Zhu, LF.; Hemzalová, P.; Hild, S.; Raabe, D.; Neugebauer, J.

    2016-01-01

    Roč. 11, č. 5 (2016), č. článku Art. Number 055006. ISSN 1748-3182 Institutional support: RVO:68081723 Keywords : Crustacea * cuticle * Decapoda * Isopoda * amorphous calcium carbonate * amorphous calcium phosphate * multi-scale modeling Subject RIV: BO - Biophysics Impact factor: 2.939, year: 2016

  9. Author Details

    African Journals Online (AJOL)

    Lozano, IJ. Vol 18 (1997) - Articles Life history of plesionika edwardsi (crustacea, decapoda, Pandalidae) around the Canary Islands, Eastern central Atlantic Abstract PDF. ISSN: 1814-2338. AJOL African Journals Online. HOW TO USE AJOL... for Researchers · for Librarians · for Authors · FAQ's · More about AJOL · AJOL's ...

  10. New observations on the crustacean fauna of Europa Island ...

    African Journals Online (AJOL)

    The Crustacea Decapoda of Europa Island have been inventoried during the BIORECIE fieldwork conducted from 7-12 November 2011. Previous records for Europa Island have been also compiled and an updated documented checklist of the species is proposed. In total, 175 decapods are reported for Europa Island, ...

  11. Crustacea: Branchiura

    African Journals Online (AJOL)

    1993-03-25

    Mar 25, 1993 ... terminology describing the various parts of the digestive tract 01 branchiurans is discussed. .... suboesophageaJ ganglion; 55 S-shaped duct; TG thoracic ganglia; YS coils of .... All sections are transverse except C and J which.

  12. The ventral nerve cord in Cephalocarida (Crustacea): new insights into the ground pattern of Tetraconata.

    Science.gov (United States)

    Stegner, Martin E J; Brenneis, Georg; Richter, Stefan

    2014-03-01

    Cephalocarida are Crustacea with many anatomical features that have been interpreted as plesiomorphic with respect to crustaceans or Tetraconata. While the ventral nerve cord (VNC) has been investigated in many other arthropods to address phylogenetic and evolutionary questions, the few studies that exist on the cephalocarid VNC date back 20 years, and data pertaining to neuroactive substances in particular are too sparse for comparison. We reinvestigated the VNC of adult Hutchinsoniella macracantha in detail, combining immunolabeling (tubulin, serotonin, RFamide, histamine) and nuclear stains with confocal laser microscopy, complemented by 3D-reconstructions based on serial semithin sections. The subesophageal ganglion in Cephalocarida comprises three segmental neuromeres (Md, Mx1, Mx2), while a separate ganglion occurs in all thoracic segments and abdominal segments 1-8. Abdominal segments 9 and 10 and the telson are free of ganglia. The maxillar neuromere and the thoracic ganglia correspond closely in their limb innervation pattern, their pattern of mostly four segmental commissures and in displaying up to six individually identified serotonin-like immunoreactive neurons per body side, which exceeds the number found in most other tetraconates. Only two commissures and two serotonin-like immunoreactive neurons per side are present in abdominal ganglia. The stomatogastric nervous system in H. macracantha corresponds to that in other crustaceans and includes, among other structures, a pair of lateral neurite bundles. These innervate the gut as well as various trunk muscles and are, uniquely, linked to the unpaired median neurite bundle. We propose that most features of the cephalocarid ventral nerve cord (VNC) are plesiomorphic with respect to the tetraconate ground pattern. Further, we suggest that this ground pattern includes more serotonin-like neurons than hitherto assumed, and argue that a sister-group relationship between Cephalocarida and Remipedia, as

  13. vasa-related genes and their expression in stem cells of colonial parasitic rhizocephalan barnacle Polyascus polygenea (Arthropoda: Crustacea: Cirripedia: Rhizocephala).

    Science.gov (United States)

    Shukalyuk, Andrey I; Golovnina, Kseniya A; Baiborodin, Sergei I; Gunbin, Konstantin V; Blinov, Alexander G; Isaeva, Valeria V

    2007-02-01

    vasa (vas)-related genes are members of the DEAD-box protein family and are expressed in the germ cells of many Metazoa. We cloned vasa-related genes (PpVLG, CpVLG) and other DEAD-box family related genes (PpDRH1, PpDRH2, CpDRH, AtDRHr) from the colonial parasitic rhizocephalan barnacle Polyascus polygenea, the non-colonial Clistosaccus paguri (Crustacea: Cirripedia: Rhizocephala), and the parasitic isopodan Athelgis takanoshimensis (Crustacea: Isopoda). The colonial Polyascus polygenea, a parasite of the coastal crabs Hemigrapsus sanguineus and Hemigrapsus longitarsis was used as a model object for further detailed investigations. Phylogenetic analysis suggested that PpVLG and CpVLG are closely related to vasa-like genes of other Arthropoda. The rest of the studied genes form their own separate branch on the phylogenetic tree and have a common ancestry with the p68 and PL10 subfamilies. We suppose this group may be a new subfamily of the DEAD-box RNA helicases that is specific for parasitic Crustacea. We found PpVLG and PpDRH1 expression products in stem cells from stolons and buds of internae, during asexual reproduction of colonial P. polygenea, and in germ cells from sexually reproducing externae, including male spermatogenic cells and female oogenic cells.

  14. Occurrence of the lessepsian species Portunus pelagicus (Crustacea and Apogon pharaonis (Pisces in the marine area of Rhodes Island

    Directory of Open Access Journals (Sweden)

    M. CORSINI-FOKA

    2004-06-01

    Full Text Available A large number of Red Sea species are colonizing the eastern Mediterranean Sea via the Suez Canal, mainly following the Anatolian coasts and spreading westwards. Portunus pelagicus is one of the most common Red Sea swimming crabs, first recorded in the Levantine Basin in 1898. Four specimens of P. pelagicus were collected in different marine areas of Rhodes Island from 1991 to 2000, while three specimens of the lessepsian fish Apogon pharaonis, first recorded in the Mediterranean in 1947, were caught during 2002 in the NW coast of Rhodes. The sub-tropical character of the marine area around Rhodes seems to facilitate the propagation of lessepsian species. These migrants have reached the island at different velocity and degree of establishment of their populations. The occurrence of the blue swimmer crab P. pelagicus and of the bullseye cardinal fish A. pharaonis increases the number of the decapod Crustacea and fish species of Red Sea origin observed in Greek waters.

  15. DIRS1-like retrotransposons are widely distributed among Decapoda and are particularly present in hydrothermal vent organisms

    Directory of Open Access Journals (Sweden)

    Bonnivard Eric

    2009-04-01

    allowed for revealing for the first time a widespread distribution of these elements among a large phylum, here the order Decapoda. They also suggest some peculiar features of these retrotransposons in hydrothermal organisms where a great diversity of elements is already observed. Finally, this paper constitutes the first essential step which allows for considering further studies based on the dynamics of the DIRS1-like retrotransposons among several genomes.

  16. Trophic ecology of the freshwater prawn, Pseudopalaemon bouvieri (Decapoda: Palaemonidae in Northeastern Argentina: with remarks on population structure

    Directory of Open Access Journals (Sweden)

    Romina Patricia Carnevali

    2012-03-01

    Full Text Available Freshwater decapod crustaceans are important components of food webs in these environments, but little is known about the diet of species that live in tropical waters. We studied the feeding ecology of the prawn Pseudopalaemon bouvieri and its population structure in two different areas with six lagoons, with a different composition and abundance of aquatic macrophytes. At each site of macrophytes banks, 18 prawns sample was collected with a hand net (1mm mesh size from 1m². In the laboratory, prawns cephalothorax length was measured, sex determined, and a total of 208 stomachs were examined for food items. Our results showed that the population abundance varied between 10 ind/m² and 1 411 ind/m². The cephalothorax length ranged between 6mm and 21mm, and the male:female ratio varied between 0.3 and 1.0, with a higher proportion of ovigerous females (21% in area one than area two. P. bouvieri is omnivorous, and its diet was principally based on algae, plant remains, Protozoa, Rotifera, Oligochaeta, Crustacea, Insecta, detritus and other items. The analysis of the stomach content did not reveal any significant difference in the diet between juveniles and adults, and males and females of both areas consumed a similar diet (Kruskal-Wallis test p=0.8273. We concluded that the dietary items consumed by prawns and the niche breadth were similar between the two areas, although the proportion of items consumed varied between lagoons of both areas. The density of P. bouvieri was different between areas, but the size of cephalothorax (CL was similar.

  17. Estudios sobre los Entomostráceos de Colombia.V. Limnadia Orinoquiensis, una nueva especie de la familia Limnadiidae Sars, 1896 (Arthropoda, Crustacea, Conchostraca Estudios sobre los Entomostráceos de Colombia.V. Limnadia Orinoquiensis, una nueva especie de la familia Limnadiidae Sars, 1896 (Arthropoda, Crustacea, Conchostraca

    Directory of Open Access Journals (Sweden)

    Roessler Ewald W.

    1991-06-01

    Full Text Available En el presente estudio se describen rasgos morfológicos de una nueva especie colombiana del género Limnadia Brongniart, 1820, Limnadia orinoquiensis (Arthropoda, Crustacea, Conchostraca. La forma es de reproducción bisexual y típica para las aguas ácidas y oscuras de los alrededores de Puerto Inírida, Comisaria del Guainía. The present study describes morfological features of a new colombian species of the genus Limnadia Brongniart, 1820, Limnadia orinoquiensis (Arthropoda, Crustacea, Conchostraca, a species of bisexual reproduction, typical to the dark waters of temporary pools in the surroundings of Puerto Inírida, Comisaria of Guainía.

  18. Antibacterial activity of GUAVA, Psidium guajava Linnaeus, leaf extracts on diarrhea-causing enteric bacteria isolated from Seabob shrimp, Xiphopenaeus kroyeri (Heller).

    Science.gov (United States)

    Gonçalves, Flávia A; Andrade Neto, Manoel; Bezerra, José N S; Macrae, Andrew; Sousa, Oscarina Viana de; Fonteles-Filho, Antonio A; Vieira, Regine H S F

    2008-01-01

    Guava leaf tea of Psidium guajava Linnaeus is commonly used as a medicine against gastroenteritis and child diarrhea by those who cannot afford or do not have access to antibiotics. This study screened the antimicrobial effect of essential oils and methanol, hexane, ethyl acetate extracts from guava leaves. The extracts were tested against diarrhea-causing bacteria: Staphylococcus aureus, Salmonella spp. and Escherichia coli. Strains that were screened included isolates from seabob shrimp, Xiphopenaeus kroyeri (Heller) and laboratory-type strains. Of the bacteria tested, Staphylococcus aureus strains were most inhibited by the extracts. The methanol extract showed greatest bacterial inhibition. No statistically significant differences were observed between the tested extract concentrations and their effect. The essential oil extract showed inhibitory activity against S. aureus and Salmonella spp. The strains isolated from the shrimp showed some resistance to commercially available antibiotics. These data support the use of guava leaf-made medicines in diarrhea cases where access to commercial antibiotics is restricted. In conclusion, guava leaf extracts and essential oil are very active against S. aureus, thus making up important potential sources of new antimicrobial compounds.

  19. Peroral endoscopic myotomy is a viable option for failed surgical esophagocardiomyotomy instead of redo surgical Heller myotomy: a single center prospective study.

    Science.gov (United States)

    Onimaru, Manabu; Inoue, Haruhiro; Ikeda, Haruo; Yoshida, Akira; Santi, Esperanza Grace; Sato, Hiroki; Ito, Hiroaki; Maselli, Roberta; Kudo, Shin-ei

    2013-10-01

    Surgical Heller myotomy has high rates of successful long-term results, but failed cases still remain. Moreover, the treatment strategy in patients with surgical myotomy failure is controversial. Recently, peroral endscopic myotomy (POEM) was reported to be efficient and safe in primary treatment of achalasia. In this study, we aimed to evaluate the efficacy and safety of POEM for surgical myotomy failure as a rescue second-line treatment, and we discuss the treatment options adapted in achalasia recurrence. A total of 315 consecutive achalasia patients received POEM from September 2008 to December 2012 in our hospital. Eleven (3.5%) patients who had persistent or recurrent achalasia and had received surgical myotomy as a first-line treatment from other hospitals were included in this study. Patient background, barium swallow studies, esophagogastroduodenoscopy (EGD), manometry, and symptom scores were prospectively evaluated. In principle, all patients in whom surgical myotomy failed received pneumatic balloon dilatation (PBD) as the first line "rescue" treatment, and only if PBD failed were patients considered for rescue POEM. The PBD alone was effective in 1 patient, and in the remaining 10 patients, rescue POEM was performed successfully without complications. Three months after rescue POEM, significant reduction in lower esophageal sphincter (LES) resting pressures (22.1 ± 6.6 mmHg vs 10.9 ± 4.5 mmHg, p myotomy were excellent. Long-term results are awaited. Copyright © 2013 American College of Surgeons. Published by Elsevier Inc. All rights reserved.

  20. Peroral endoscopic myotomy (POEM) vs laparoscopic Heller myotomy (LHM) for the treatment of Type III achalasia in 75 patients: a multicenter comparative study.

    Science.gov (United States)

    Kumbhari, Vivek; Tieu, Alan H; Onimaru, Manabu; El Zein, Mohammad H; Teitelbaum, Ezra N; Ujiki, Michael B; Gitelis, Matthew E; Modayil, Rani J; Hungness, Eric S; Stavropoulos, Stavros N; Shiwaku, Hiro; Kunda, Rastislav; Chiu, Philip; Saxena, Payal; Messallam, Ahmed A; Inoue, Haruhiro; Khashab, Mouen A

    2015-06-01

    Type III achalasia is characterized by rapidly propagating pressurization attributable to spastic contractions. Although laparoscopic Heller myotomy (LHM) is the current gold standard management for type III achalasia, peroral endoscopic myotomy (POEM) is conceivably superior because it allows for a longer myotomy. Our aims were to compare the efficacy and safety of POEM with LHM for type III achalasia patients. A retrospective study of 49 patients who underwent POEM for type III achalasia across eight centers were compared to 26 patients who underwent LHM at a single institution. Procedural data were abstracted and pre- and post-procedural symptoms were recorded. Clinical response was defined by improvement of symptoms and decrease in Eckardt stage to ≤ 1. Secondary outcomes included length of myotomy, procedure duration, length of hospital stay, and rate of adverse events. Clinical response was significantly more frequent in the POEM cohort (98.0 % vs 80.8 %; P = 0.01). POEM patients had significantly shorter mean procedure time than LHM patients (102 min vs 264 min; P myotomy (16 cm vs 8 cm; P myotomy than LHM, which may result in improved clinical outcomes. POEM appears to be an effective and safe alternative to LHM in patients with type III achalasia.

  1. Evaluation of the haematological parameters in Piaractus mesopotamicus Holmberg (Osteichthyes, Characidae with Argulus sp. (Crustacea, Branchiura infestation and treatment with organophosphate

    Directory of Open Access Journals (Sweden)

    Marcos Tavares-Dias

    1999-06-01

    Full Text Available Haematological parameters as erythrocytes, leukocytes and plasma glucose in Piaractus mesopotamicus Holmberg, 1887 were analyzed. Fish were parasitized with Argulus sp. (Crustacea, Branchiura and treated with 0.4 mg of thriclorphon 500/L water. The effects of parasitism and the action of the treatment were evaluated. Parasitized fish showed greater number of monocytes (P>0.05 and special granulocitic cells (P0.05. Organophosphate treatment presented significantly reduction (P>0.05 in red blood cells (RBC and hemoglobin.

  2. Els isòpodes terrestres (Crustacea: Isopoda: Oniscidea) del Parc Natural de l’illa de sa Dragonera (Illes Balears, Mediterrània occidental)

    OpenAIRE

    Garcia, Ll.

    2008-01-01

    S’han recol·lectat 17 espècies d’isòpodes terrestres (Crustacea: Oniscidea) al Parc natural de l’illa de sa Dragonera, situada al sud-oest de l’illa de Mallorca (Espanya, Illes Balears, Mediterrània occidental). En el decurs de vàries expedicions realitzades a l’illa en els anys 1989, 1999, 2000, 2005 i 2006 s’han capturat aproximadament 400 exemplars, directament a mà o mitjançant trampes de caiguda. Fins aleshores únicament s’havia citat a sa Dragonera una espècie d’Oniscidea...

  3. A dataset on the species composition of amphipods (Crustacea) in a Mexican marine national park: Alacranes Reef, Yucatan.

    Science.gov (United States)

    Paz-Ríos, Carlos E; Simões, Nuno; Pech, Daniel

    2018-01-01

    Alacranes Reef was declared as a National Marine Park in 1994. Since then, many efforts have been made to inventory its biodiversity. However, groups such as amphipods have been underestimated or not considered when benthic invertebrates were inventoried. Here we present a dataset that contributes to the knowledge of benthic amphipods (Crustacea, Peracarida) from the inner lagoon habitats from the Alacranes Reef National Park, the largest coral reef ecosystem in the Gulf of Mexico. The dataset contains information on records collected from 2009 to 2011. Data are available through Global Biodiversity Information Facility (GBIF). A total of 110 amphipod species distributed in 93 nominal species and 17 generic species, belonging to 71 genera, 33 families and three suborders are presented here. This information represents the first online dataset of amphipods from the Alacranes Reef National Park. The biological material is currently deposited in the crustacean collection from the regional unit of the National Autonomous University of Mexico located at Sisal, Yucatan, Mexico (UAS-Sisal). The biological material includes 588 data records with a total abundance of 6,551 organisms. The species inventory represents, until now, the richest fauna of benthic amphipods registered from any discrete coral reef ecosystem in Mexico.

  4. Comparative life-histories, population dynamics and productivity of Schistomysis populations (Crustacea, Mysida) in European shelf environments

    Science.gov (United States)

    San Vicente, Carlos; Sorbe, Jean Claude

    2013-08-01

    A biological study of suprabenthic mysids of genus Schistomysis (Crustacea, Mysida, Mysidae) was carried out based on quantitative samples collected in coastal waters of the SE Bay of Biscay (NE Atlantic) and the Catalan Sea (W Mediterranean). Aspects of the ecology of species noted during this study are summarized and the results of previous researches are incorporated. Small and large-scale environmental factors (swash and surf climate, depth, temperature, day-night and seasonal cycles) contributed significantly to population distributions. All Schistomysis populations are characterized by faster individual growth and earlier maturity at higher temperature, resulting in intensive recruitment during spring or summer seasons in combination with higher fecundity of genitors. Regarding productivity, our production and P/B¯ estimates ranged between 2255-26,321 mg AFDW/100 m3/year and 6.09-9.73, respectively. These production values are similar to those found for comparable marine mysids with two or three generations per year. The observed demographic heterogeneity and production of populations has ecological implications in the Bay of Biscay and Mediterranean areas, where Schistomysis species are dominant components of littoral and shelf suprabenthic communities.

  5. Lunar-Rhythmic Molting in Laboratory Populations of the Noble Crayfish Astacus astacus (Crustacea, Astacidea): An Experimental Analysis

    Science.gov (United States)

    Franke, Robert; Hoerstgen-Schwark, Gabriele

    2013-01-01

    Juvenile noble crayfish, Astacusastacus (Crustacea, Astacidea) in the second year of age were kept in the laboratory for a twelve-month period under continuing “summer conditions” (LD 16:8, 19°C). Molting processes in this population could be synchronized by artificial moonlight cycles. Peaks of exuviations occurred at “new moons”. Males showed a slightly higher degree of synchronization than females. A phase-shift of the artificial lunar cycle in relation to the natural cycle resulted in a corresponding shift of the molting cycle. This clearly demonstrates that changes in the nocturnal light regime provide the primary external information for the lunar-monthly molting rhythm. There is a first indication that lunar photic stimuli do not act directly but as a zeitgeber which entrains an endogenous molting rhythm to the lunar cycle. Moreover, the results of the long-term experiments suggest that the hibernal resting period of A . astacus in the field (no molts between October and April) may also involve some endogenous programming. Continuing artificial summer conditions can delay but not completely suppress this resting period. The adaptive significance of the phenomena and how the findings may be applied to improve the management of crowded crayfish stocks are discussed. PMID:23840899

  6. Bioaccumulation in Porcellio scaber (Crustacea, Isopoda) as a measure of the EDTA remediation efficiency of metal-polluted soil

    International Nuclear Information System (INIS)

    Udovic, Metka; Drobne, Damjana; Lestan, Domen

    2009-01-01

    Leaching using EDTA applied to a Pb, Zn and Cd polluted soil significantly reduced soil metal concentrations and the pool of metals in labile soil fractions. Metal mobility (Toxicity Characteristic Leaching Procedure), phytoavailability (diethylenetriaminepentaacetic acid extraction) and human oral-bioavailability (Physiologically Based Extraction Test) were reduced by 85-92%, 68-91% and 88-95%, respectively. The metal accumulation capacity of the terrestrial isopod Porcellio scaber (Crustacea) was used as in vivo assay of metal bioavailability, before and after soil remediation. After feeding on metal contaminated soil for two weeks, P. scaber accumulated Pb, Zn and Cd in a concentration dependent manner. The amounts of accumulated metals were, however, higher than expected on the basis of extraction (in vitro) tests. The combined results of chemical extractions and the in vivo test with P. scaber provide a more relevant picture of the availability stripping of metals after soil remediation. - Bioaccumulation tests with Porcellio scaber isopods are proposed as a supplement to chemical extraction in assessing metal bioavailability before and after soil remediation.

  7. Reproductive biology and seasonality of the Indo-Australasian mysid Mesopodopsis orientalis (Crustacea: Mysida) in a tropical mangrove estuary, Malaysia

    Science.gov (United States)

    Hanamura, Yukio; Siow, Ryon; Chee, Phaik-Ean

    2008-04-01

    A year-round survey of the tropical shallow-water mysid Mesopodopsis orientalis (Tattersall, 1908) (Crustacea, Mysidacea) was conducted in the Merbok mangrove estuary, northwestern Peninsular Malaysia. The mysid formed dense aggregations at the river's edge close to the mangrove forest during the daytime, but very few were captured elsewhere in the estuary system. The sampled population was found in a wide range of salinities from 16 to 32, demonstrating broad euryhalinity, and the number of the catch at the littoral zone ranged from 11.8 to 2273 ind m -2. The overall annual mean was 709.2 ind m -2. Females predominated over males in the entire population, and brooding females were present at every monthly sample, indicating that reproduction is continuous year round. The clutch size positively correlated with female body length. The diameter of eggs (Stage I embryos) was unaffected by the seasonality and independent of the maternal size within an observed size range. The life history pattern of the estuarine population of M. orientalis showed close similarity to that of the coastal counterpart. However, the former was found to produce fewer but larger eggs, and the specimens in this population were larger than those in the coastal population at the embryo, juvenile, and adult stages. This evidence indicates that the life history features of the estuarine population would differ to some degree from those of the coastal counterpart.

  8. Phylogeography of Daphnia magna Straus (Crustacea: Cladocera) in Northern Eurasia: Evidence for a deep longitudinal split between mitochondrial lineages.

    Science.gov (United States)

    Bekker, Eugeniya I; Karabanov, Dmitry P; Galimov, Yan R; Haag, Christoph R; Neretina, Tatiana V; Kotov, Alexey A

    2018-01-01

    Species with a large geographic distributions present a challenge for phylogeographic studies due to logistic difficulties of obtaining adequate sampling. For instance, in most species with a Holarctic distribution, the majority of studies has concentrated on the European or North American part of the distribution, with the Eastern Palearctic region being notably understudied. Here, we study the phylogeography of the freshwater cladoceran Daphnia magna Straus, 1820 (Crustacea: Cladocera), based on partial mitochondrial COI sequences and using specimens from populations spread longitudinally from westernmost Europe to easternmost Asia, with many samples from previously strongly understudied regions in Siberia and Eastern Asia. The results confirm the previously suspected deep split between Eastern and Western mitochondrial haplotype super-clades. We find a narrow contact zone between these two super-clades in the eastern part of Western Siberia, with proven co-occurrence in a single lake in the Novosibirsk region. However, at present there is no evidence suggesting that the two mitochondrial super-clades represent cryptic species. Rather, they may be explained by secondary contact after expansion from different refugia. Interestingly, Central Siberia has previously been found to be an important contact zone also in other cladoceran species, and may thus be a crucial area for understanding the Eurasian phylogeography of freshwater invertebrates. Together, our study provides an unprecedented complete, while still not global, picture of the phylogeography of this important model species.

  9. The effect of starvation and re-feeding on mitochondrial potential in the midgut of Neocaridina davidi (Crustacea, Malacostraca.

    Directory of Open Access Journals (Sweden)

    Agnieszka Włodarczyk

    Full Text Available The midgut in the freshwater shrimp Neocaridina davidi (previously named N. heteropoda (Crustacea, Malacostraca is composed of a tube-shaped intestine and a large hepatopancreas that is formed by numerous blind-ended tubules. The precise structure and ultrastructure of these regions were presented in our previous papers, while here we focused on the ultrastructural changes that occurred in the midgut epithelial cells (D-cells in the intestine, B- and F- cells in the hepatopancreas after long-term starvation and re-feeding. We used transmission electron microscopy, light and confocal microscopes and flow cytometry to describe all of the changes that occurred due to the stressor with special emphasis on mitochondrial alterations. A quantitative assessment of cells with depolarized mitochondria helped us to establish whether there is a relationship between starvation, re-feeding and the inactivation/activation of mitochondria. The results of our studies showed that in the freshwater shrimp N. davidi that were analyzed, long-term starvation activates the degeneration of epithelial cells at the ultrastructural level and causes an increase of cells with depolarized (non-active mitochondria. The process of re-feeding leads to the gradual regeneration of the cytoplasm of the midgut epithelial cells; however, these changes were observed at the ultrastructural level. Additionally, re-feeding causes the regeneration of mitochondrial ultrastructure. Therefore, we can state that the increase in the number of cells with polarized mitochondria occurs slowly and does not depend on ultrastructural alterations.

  10. The effect of starvation and re-feeding on mitochondrial potential in the midgut of Neocaridina davidi (Crustacea, Malacostraca).

    Science.gov (United States)

    Włodarczyk, Agnieszka; Sonakowska, Lidia; Kamińska, Karolina; Marchewka, Angelika; Wilczek, Grażyna; Wilczek, Piotr; Student, Sebastian; Rost-Roszkowska, Magdalena

    2017-01-01

    The midgut in the freshwater shrimp Neocaridina davidi (previously named N. heteropoda) (Crustacea, Malacostraca) is composed of a tube-shaped intestine and a large hepatopancreas that is formed by numerous blind-ended tubules. The precise structure and ultrastructure of these regions were presented in our previous papers, while here we focused on the ultrastructural changes that occurred in the midgut epithelial cells (D-cells in the intestine, B- and F- cells in the hepatopancreas) after long-term starvation and re-feeding. We used transmission electron microscopy, light and confocal microscopes and flow cytometry to describe all of the changes that occurred due to the stressor with special emphasis on mitochondrial alterations. A quantitative assessment of cells with depolarized mitochondria helped us to establish whether there is a relationship between starvation, re-feeding and the inactivation/activation of mitochondria. The results of our studies showed that in the freshwater shrimp N. davidi that were analyzed, long-term starvation activates the degeneration of epithelial cells at the ultrastructural level and causes an increase of cells with depolarized (non-active) mitochondria. The process of re-feeding leads to the gradual regeneration of the cytoplasm of the midgut epithelial cells; however, these changes were observed at the ultrastructural level. Additionally, re-feeding causes the regeneration of mitochondrial ultrastructure. Therefore, we can state that the increase in the number of cells with polarized mitochondria occurs slowly and does not depend on ultrastructural alterations.

  11. Real-time Continuous Esophageal High-resolution Manometry (HRM) During Laparoscopic Heller Myotomy and Dor Fundoplication for the Treatment of Achalasia. A Promising Novelty in Regards of Perfecting Surgical Technique: Could It Guide Surgical Technique Toward Excellent Results?

    Science.gov (United States)

    Triantafyllou, Tania; Doulami, Georgia; Papailiou, Joanna; Mantides, Apostolos; Zografos, Georgios; Theodorou, Dimitrios

    2016-12-01

    High-resolution manometry (HRM) is the gold-standard diagnostic tool for achalasia of the esophagus. Laparoscopic Heller-Dor technique is the preferred surgical approach with success rate estimated 90%. The use of intraoperative HRM provides real-time estimation of intraluminal esophageal pressures and identifies the exact points of esophageal luminal pressure during laparoscopy. Ten patients with achalasia underwent surgery. All patients preoperatively completed 1 manometric study and Quality of Life questionnaires (EORTC QLQ-C30 version 3.0) with Eckardt scores. We collected intraoperative manometry data and repeated manometric studies, EORTC QLQ-C30, and Eckardt scores postoperatively. Median Eckardt score was decreased from 7.5 to 0.5, mean resting pressure decreased from 51.4 to 11.9 mm Hg, whereas mean residual pressure diminished from 45.9 to 9.5 mm Hg postoperatively. The simultaneous use of HRM during the Heller-Dor technique may lead to an individualized management of the disease.

  12. Distribución espacial de Ocypode quadrata (Decapoda: Ocypodidae en ocho playas de la zona norte oriental de Cuba

    Directory of Open Access Journals (Sweden)

    Frank A. Ocaña

    2012-09-01

    Full Text Available Uno de los organismos más comunes en las playas arenosas son los miembros del género Ocypode conocidos como cangrejos fantasmas, están ampliamente distribuidos en las regiones tropicales y subtropicales; además tienen un importante papel en la transferencia de energía en diferentes niveles tróficos. El objetivo del presente trabajo es dar a conocer aspectos relacionados con la variación espacial de la densidad de O. quadrata en playas con diferente nivel de influencia humana en la costa norte oriental de Cuba. En mayo de 2010, fueron contadas un total de 355 galerías en 360 unidades de muestreo. La composición por clases de tallas fue de 237 galerías de jóvenes y 118 de adultos. Del total de galerías contadas el 74% ocuparon el nivel P1, 20% el nivel P2 y 6% el nivel P3. La densidad varió entre 0.06-0.52galerías/m2. A pesar del nivel de influencia humana, la mayoría de las playas no mostró diferencias significativas en la densidad de galerías (Scheffé, p>0.05. La densidad de individuos en la zona superior de resaca del oleaje es mayor (Scheffé, pSpatial distribution of Ocypode quadrata (Decapoda: Ocypodidae in eight beaches of NorthEastern Cuba. Studies on the ecology of Ocypode quadrata have been mostly carried out in the Northern and Southern part of its distribution range. In despite that this species is common in Cuban beaches, there are no quantitative studies regarding its abundance and spatial distribution. The aim of this study was to report some aspects about the spatial variation of O. quadrata density in sandy beaches, with different levels of human influence, in the North coast of Eastern Cuba. For this, on May 2010, eight beaches with different levels of human influence were surveyed. On each beach, the number of crabs burrows were counted in 45 quadrats of 4m2 located in three different strata (P1, P2 and P3. According to burrow opening diameter, crabs were separated into young and adults forms. To determine the

  13. Influencia del ciclo lunar en la captura de langosta espinosa Panulirus argus (Decapoda: Palinuridae en el Golfo de Batabanó, Cuba

    Directory of Open Access Journals (Sweden)

    Alexander Lopeztegui

    2011-03-01

    Full Text Available Muchos procesos biológicos tales como los comportamientos reproductivos y migratorios se han asociado con los ciclos de la luna. Con el objetivo de determinar la relación entre las capturas de langosta espinosa Panulirus argus (Decapoda: Palinuridae y el ciclo lunar, en la zona del Golfo de Batabanó, se correlacionaron los niveles de iluminación nocturna del ciclo lunar (INT con la captura diaria por barco (CDB durante siete meses lunares correspondientes al período de pesca del 2002. Los datos de captura provinieron de las tres empresas pesqueras que realizan su actividad en la zona del Golfo de Batabanó. La relación entre el ciclo lunar y las capturas de langostas fue examinada mediante varios procedimientos estadísticos. Los primeros gráficos realizados, cualitativos, mostraron que no existe relación entre las tasas de captura y el ciclo lunar. Los coeficientes de Spearman calculados, modularmente menores que 0.1 en todos los casos, demostraron cuantitativamente que no existe correlación entre las mencionadas variables. La prueba de Kruskal-Wallis detectó diferencias sólo en una de las tres áreas estudiadas. Las correlaciones cruzadas no detectaron significación en ninguna de las zonas, con coeficientes de correlación cruzada modularmente inferiores a 0.1. A diferencia de lo reportado por otros autores, las capturas de P. argus y el ciclo lunar no presentan correlación significativa en el Golfo de Batabanó.Influence of lunar cycle on catches of spiny lobster Panulirus argus (Decapoda: Palinuridae in the Gulf of Batabanó, Cuba. Many biological processes such as reproductive and migratory behaviours have been associated with moon cycles. In this study, the nocturnal light levels associated with lunar cycle (INT were correlated with daily catch rate of lobster P. argus, during seven lunar months of 2002 fishing period, to determine a possible relationship between these variables. The lobster catches were obtained from three

  14. Resultados tardios da operação de Heller associada à fundoplicatura no tratamento do megaesôfago: análise de 83 casos

    Directory of Open Access Journals (Sweden)

    Herbella F. A. M.

    1999-01-01

    Full Text Available OBJETIVO: Estudo retrospectivo dos resultados tardios dos pacientes submetidos a miotomia e fundoplicatura para o tratamento do megaesôfago. CASUÍSTICA E MÉTODO: Foram estudados 83 pacientes com seguimento de um a 186 meses (média de 40,0 ± 47,4 meses. A fundoplicatura em três planos, proposta por Pinotti, foi realizada em 15,7% dos doentes e a fundoplicatura parcial posterior em 83,1%. A queixa pré-operatória principal foi disfagia, seguida de regurgitação e perda ponderal. A etiologia chagásica pode ser comprovada em 72,3% dos doentes, através de teste sorológico. RESULTADOS: No seguimento, 55,4% dos doentes estavam assintomáticos, 34,9% queixavam-se de disfagia esporádica, 14,4% de pirose, 8,4% de regurgitação e 2,4% de disfagia igual pré-operatória, sendo esses últimos re-operados, com melhora da sintomatologia. Refluxo gastro-esofágico foi constatado em 8,4% dos doentes. Outras complicações tardias foram: hérnia paraesofágica, deslizamento da fundoplicatura, esôfago de Barrett e neoplasia do esôfago. CONCLUSÃO: Os autores salientam a necessidade de acompanhamento clínico e endoscópico perene dos doentes, mesmo operados, devido à possibilidade de complicações tardias, em especial o câncer. Concluem por bons resultados tardios em relação à disfagia. Propõem, como alternativa à esofagectomia, a operação de Heller em pacientes portadores de megaesôfago grau IV com más condições clínicas, que não suportariam uma cirurgia de maior porte.

  15. An overview of the distribution of the Parabathynellidae (Crustacea, Syncarida Bathynellacea on the Iberian Peninsula and Balearic Islands

    Directory of Open Access Journals (Sweden)

    Camacho, Ana I.

    2003-06-01

    Full Text Available This paper reviews all the knowledge on the presence and distribution of 26 species of the family Parabathynellidae Noodt, 1964 (Crustacea, Syncarida, Bathynellacea on the Iberian Peninsula and Balearic Islands. The different genera, subgenera and species distributions are subjected to a basic analysis. The presence of these taxa in different subterranean aquatic habitats (caves, springs, wells and interstitial environment is also discussed. The most sampled habitat was the interstitial environment (45%; the least sampled habitat was springs (5%. The most commonly found genus was Iberobathynella Schminke, 1973 (54% and the rarest was Guadalopebathynella Camacho & Serban, 1998 (0.7% All the knowledge on these taxa in the study area, in Europe and in the world is compared and evaluated. More species of the Parabathynellidae live on the Iberian Peninsula and Balearic Islands than in any other part of the world (26 species. Iberobathynella is a highly diversified genus endemic to the Iberian peninsula. Its diversity is comparable to another genus in the order, Hexabathynella Schminke, 1972, which also has 18 described species. However, Hexabathynella has a cosmopolitan distribution.

    En este trabajo se reúne y actualiza el conocimiento acerca de la presencia y distribución de 26 especies de batinelas de la familia Parabathynellidae (Crustacea, Syncarida, Bathynellacea en la Península Ibérica y las Islas Baleares. Se analiza de forma crítica la distribución de los diferentes géneros, subgéneros y especies y se discute acerca de la presencia de los mismos en diferentes habitat acuáticos subterráneos (cuevas, fuentes o surgencias, pozos y medio intersticial asociado a ríos epigeos. El mayor número de puntos de muestreo corresponde al medio intersticial (45% del total y en él se encuentran los cinco géneros presentes en el área de estudio; las surgencias constituyen el conjunto con menos puntos de

  16. Antibacterial activity of GUAVA, Psidium guajava Linnaeus, leaf extracts on diarrhea-causing enteric bacteria isolated from Seabob shrimp, Xiphopenaeus kroyeri (Heller Avaliação da atividade antibacteriana de extrato de folhas de goiabeira, Psidium guajava Linnaeus, sobre bactérias entéricas diarreiogênicas, isoladas de camarão sete-barbas, Xiphopenaeus kroyeri (Heller

    Directory of Open Access Journals (Sweden)

    Flávia A. Gonçalves

    2008-02-01

    Full Text Available Guava leaf tea of Psidium guajava Linnaeus is commonly used as a medicine against gastroenteritis and child diarrhea by those who cannot afford or do not have access to antibiotics. This study screened the antimicrobial effect of essential oils and methanol, hexane, ethyl acetate extracts from guava leaves. The extracts were tested against diarrhea-causing bacteria: Staphylococcus aureus, Salmonella spp. and Escherichia coli. Strains that were screened included isolates from seabob shrimp, Xiphopenaeus kroyeri (Heller and laboratory-type strains. Of the bacteria tested, Staphylococcus aureus strains were most inhibited by the extracts. The methanol extract showed greatest bacterial inhibition. No statistically significant differences were observed between the tested extract concentrations and their effect. The essential oil extract showed inhibitory activity against S. aureus and Salmonella spp. The strains isolated from the shrimp showed some resistance to commercially available antibiotics. These data support the use of guava leaf-made medicines in diarrhea cases where access to commercial antibiotics is restricted. In conclusion, guava leaf extracts and essential oil are very active against S. aureus, thus making up important potential sources of new antimicrobial compounds.O chá de folhas de goiaba Psidium guajava Linnaeus é comumente usado como remédio nas gastrenterites e diarréias infantis por aqueles que não têm acesso a antibióticos. Esta pesquisa estudou o efeito antibacteriano sobre bactérias causadoras de diarréias, do óleo essencial e do extrato de folhas de goiabeira usando como diluente: metanol, hexano e acetato de etila. Os extratos foram testados sobre Staphylococcus aureus, Salmonella spp. e Escherichia coli. As bactérias testadas foram isoladas de camarão sete-barbas Xiphopenaeus kroyeri (Heller usando-se como controle cepas padrão, de cada espécie. Das bactérias testadas, o melhor efeito inibitório foi

  17. Diversidad y biomasa de macro-invertebrados en matrices intermareales del tunicado Pyura praeputialis (Heller, 1878 en la Bahía de Antofagasta, Chile Diversity and biomass of macro-invertebrates in intertidal matrices of the tunicate Pyura praeputialis (Heller, 1878 in the Bay of Antofagasta, Chile

    Directory of Open Access Journals (Sweden)

    MAURICIO CERDA

    2001-12-01

    Full Text Available Se analiza la diversidad biológica y biomasa de macro-invertebrados asociados a los mantos intermareales del tunicado Pyura praeputialis (Heller, 1878 en la Bahía de Antofagasta, donde la especie se encuentra casi exclusivamente confinada a lo largo de aproximadamente 70 km de extensión costera de dicha bahía. En la bahía se seleccionaron tres sitios para el análisis de los mantos de piures: uno localizado aproximadamente en el centro de la distribución del tunicado y dos cercanos a los límites norte y sur (ecotonos de dicha distribución. La arquitectura de las matrices de piures genera substrato secundario y bio-hábitat que corresponden a los de una especie bio-ingeniera ecosistémica. En las matrices se encontró una diversidad gama de 96 taxa de macro-invertebrados, pertenecientes a nueve phyla. Entre ellos destaca la riqueza de gastrópodos (28 %, poliquetos (26 %, decápodos (15 % y bivalvos (14 %. Para los macro-invertebrados se registró una biomasa promedio de 246,40 g m-2 . Los atributos de diversidad y biomasa de macro-invertebrados no presentaron diferencias significativas entre sitios, lo cual sugiere que el efecto de estas matrices sobre la diversidad y biomasa de los macro-invertebrados es similar a lo largo del rango de distribución dentro de la bahía. Los resultados son discutidos en términos de los patrones de biodiversidad de macro-invertebrados, sus biomasas y el rol que juega P. praeputialis como especie bio-ingeniera en la zona costera de la Bahía de Antofagasta. Se realizan comparaciones con un estudio similar realizado en mantos de Pyura stolonifera en Natal, Sudáfrica y respecto de la biodiversidad de invertebrados asociadas a otras especies bio-ingenierasThe study was conducted to analyze the biological diversity and biomass of macro-invertebrates in intertidal matrices of Pyura praeputialis (Heller, 1878 in the Bahía de Antofagasta, where the species is confined along approximately 70 km of coastline

  18. Trophic ecology of the freshwater prawn, Pseudopalaemon bouvieri (Decapoda: Palaemonidae in Northeastern Argentina: with remarks on population structure

    Directory of Open Access Journals (Sweden)

    Romina Patricia Carnevali

    2012-03-01

    Full Text Available Freshwater decapod crustaceans are important components of food webs in these environments, but little is known about the diet of species that live in tropical waters. We studied the feeding ecology of the prawn Pseudopalaemon bouvieri and its population structure in two different areas with six lagoons, with a different composition and abundance of aquatic macrophytes. At each site of macrophytes banks, 18 prawns sample was collected with a hand net (1mm mesh size from 1m². In the laboratory, prawns cephalothorax length was measured, sex determined, and a total of 208 stomachs were examined for food items. Our results showed that the population abundance varied between 10 ind/m² and 1 411 ind/m². The cephalothorax length ranged between 6mm and 21mm, and the male:female ratio varied between 0.3 and 1.0, with a higher proportion of ovigerous females (21% in area one than area two. P. bouvieri is omnivorous, and its diet was principally based on algae, plant remains, Protozoa, Rotifera, Oligochaeta, Crustacea, Insecta, detritus and other items. The analysis of the stomach content did not reveal any significant difference in the diet between juveniles and adults, and males and females of both areas consumed a similar diet (Kruskal-Wallis test p=0.8273. We concluded that the dietary items consumed by prawns and the niche breadth were similar between the two areas, although the proportion of items consumed varied between lagoons of both areas. The density of P. bouvieri was different between areas, but the size of cephalothorax (CL was similar.Los crustáceos decápodos de agua dulce son un componente importante de la cadena trófica, pero poco se sabe sobre la dieta de las especies que viven en aguas tropicales. Nosotros estudiamos la ecología alimentaria del camarón Pseudopalaemon bouvieri y la estructura de su población en dos áreas diferentes con seis lagunas, con una diferente composición y abundancia de macrófitas acuáticas. En cada

  19. (Smith) (Decapoda: Parastacidae)

    African Journals Online (AJOL)

    feeding. R.A. van den Berg,* H.J. Schoonbee and. H.H. du Preez. Research Unit for Aquatic and Terrestrial Ecosystems,. Department of .... crustacean larvae, big protozoa, unicellular algae and clusters of bacteria on ... Habits, functional.

  20. DECAPODA, BRACHYURA, MAJIDAE

    African Journals Online (AJOL)

    BRIAN KENS LEY. South African Museum. Cape Town. Accepted: May 1977. ABSTRACT. Lambrachaew rami/er Alcock, previously known only from a single record from the Andaman. Islands, is recorded from a shallow reef off Zululand. The specimen, an ovigerous female, is described and figured. INTRODUCTION.

  1. First record of Parelasmopus setiger Chevreux, 1901 from Singapore, including synonymization of Parelasmopus siamensis Wongkamhaeng, Coleman & Pholpunthin, 2013 with Parelasmopus setiger (Crustacea, Amphipoda, Maeridae

    Directory of Open Access Journals (Sweden)

    Azman Abdul Rahim

    2015-04-01

    Full Text Available Parelasmopus setiger has been widely described from tropical to subtropical regions from Philippine Islands, Sulu Sea, Indonesia, Australia, north Indian Ocean and the Seychelles by several authors. The present study provides detailed descriptions of Parelasmopus setiger Chevreux, 1901 (Crustacea: Amphipoda based on newly collected specimens from Pulau Hantu, Singapore. Morphological characters of the specimens closely resemble those of Parelasmopus setiger and Parelasmopus siamensis Wongkamhaeng, Coleman & Pholpunthin, 2013. The specimens of both the species were quite similar to the Singapore specimens, although the shapes of appendages vary with growth and locality; therefore, P. siamensis is synonymized with P. setiger. The following species characteristics for P. setiger are indicated: 1 antenna 1 peduncle with 2 setae; 2 male gnathopod 2 propodus palm transverse; 3 Pereopods 5 to 7 posterior margins with long slender setae; and 4 dorsal carina pattern for pereonite 7 and pleonites 1 to 3.

  2. A note on the occurrence of praniza larvae of Gnathiidae (Crustacea, Isopoda on fishes from Northeast of Pará, Brazil

    Directory of Open Access Journals (Sweden)

    Daniel G. Diniz

    2008-12-01

    Full Text Available The infection of the estuarine teleost fishes Mugil gaimardianus Desmarest, 1831 (Mugilidae, Arius phrygiatus Valenciennes, 1839 (Ariidae, Conodon nobilis Linnaeus, 1759 (Haemulidae, Cetengraulis edentulus Cuvier, 1829 (Engraulidae, and Anableps anableps Linnaeus, 1758 (Anablepidae by praniza larvae of Gnathiidae (Crustacea, Isopoda was studied in specimens fished off the Atlantic Ocean in Northeast of Pará State, near Bragança, Brazil. The highest infection prevalence value was found in Anableps anableps (42.3% and the lowest in Conodon nobilis (9.1%. The mean intensity varied from 1 parasitein Conodon nobilis to 19.5 in Arius phrygiatus. A description of the larvae is provided. The morphology of the mouthparts is related to the blood sucking activity, and is compared with the characteristics of other gnathiidae species.Foi estudada a parasitose dos peixes estuarinos Mugil gaimardianus Desmarest, 1831 (Mugilidae, Arius phrygiatus Valenciennes, 1839 (Ariidae, Conodon nobilis Linnaeus, 1759 (Haemulidae, Cetengraulis edentulus Cuvier, 1829 (Engraulidae, e Anableps anableps Linnaeus, 1758 (Anablepidae por larvas praniza de Gnathiidae (Crustacea, Isopoda em exemplares pescados no Oceano Atlântico, no Nordeste do Pará, próximo a Bragança, Brasil. O valor mais elevado da prevalência da infecção foi observado em A. anableps (42,3% e o menor em C. nobilis (9,1%. A intensidade média da parasitose variou entre 1 parasita em C. nobilis até 19,5 em A. phrygiatus. Efetua-se a descrição da larva, verificando-se que a morfologia da armadura bucal está relacionada com a atividade sugadora de sangue, e faz-se a comparação com as características de outras espécies.

  3. Novo registro altitudinal de Trichodactylus fluviatilis (Latreille, 1828 (Decapoda, Trichodactylidae no Brasil - DOI: 10.4025/actascibiolsci.v31i3.785 New altitudinal record of Trichodactylus fluviatilis (Latreille, 1828 (Decapoda, Trichodactylidae in Brazil - DOI: 10.4025/actascibiolsci.v31i3.785

    Directory of Open Access Journals (Sweden)

    Bernadete Maria Sousa

    2009-07-01

    Full Text Available Trichodactylus fluviatilis (Latreille, 1828 (Decapoda, Trichodactylidae é uma espécie de caranguejo que habita rios e riachos montanhosos em altitudes até aproximadamente 500 m. Sua distribuição ocorre na América do Sul, desde as bacias costeiras da faixa leste do Brasil até a bacia do alto Paraná e na Argentina. O objetivo do presente trabalho foi registrar a ocorrência de T. fluviatilis em uma Unidade de Conservação de Juiz de Fora, Minas Gerais, e fornecer um novo registro altitudinal dessa espécie no Brasil. As amostras foram obtidas de outubro de 2004 a julho de 2005. Foram coletados três indivíduos vivos, dois machos e uma fêmea da espécie. Também foram analisados 16 regurgitos estomacais do cágado Hydromedusa maximiliani, dos quais, em seis foram encontrados partes corporais deste crustáceo. Muitas espécies de caranguejos do Brasil da família Trichodactylidae vivem em regiões acima de 500m do nível do mar. No presente estudo, T. fluviatilis foi coletado a 770 m de altitude, ampliando assim a faixa de distribuição altitudinal dessa espécie no Brasil. Até o presente estudo não existiam relatos de T. fluviatilis no município de Juiz de Fora, portanto este estudo também se constitui em um novo registro desse tricodatilídeo em Minas Gerais.Trichodactylus fluviatilis (Latreille, 1828 (Decapoda, Trichodactylidae is a crab species that lives in mountainous rivers and streams at altitudes up to 500m. Its distribution ranges from South America from the Basins of eastern coast of Brazil to basins of the Upper Paraná River and Argentina. The main objective of this study was to register a new occurrence of T. fluviatilis at a Conservation Unit in Juiz de Fora, Minas Gerais and provide a new altitudinal record for this species in Brazil. The samples were taken between October 2004 and July 2005. We collected three live T. fluviatilis individuals – two males and one female. We also analyzed the stomach contents of 16

  4. Espécies de Cladonia P. Browne (Cladoniaceae, Ascomycota dos Supergrupos Cocciferae, Crustaceae e Perviae em restingas e costões rochosos dos estados do Paraná e de Santa Catarina, Brasil Species of Cladonia P. Browne (Cladoniaceae, Ascomycota, of Supergroup Cocciferae, Crustaceae and Perviae, from restinga vegetation and rocky shores of Paraná and Santa Catarina, Brazil

    Directory of Open Access Journals (Sweden)

    Emerson Luiz Gumboski

    2012-09-01

    Full Text Available Pouco se conhece das espécies de Cladonia que ocorrem nos estados do Paraná e de Santa Catarina. Informações sobre a ocorrência de liquens em restingas são muito escassas e não há qualquer registro para costões rochosos. O objetivo do trabalho foi realizar um levantamento intensivo das espécies de Cladonia presentes em áreas de restingas e costões rochosos presentes nos estados do Paraná e de Santa Catarina, sul do Brasil. Foram encontradas nove espécies pertencentes aos Supergrupos Cocciferae, Crustaceae e Perviae, sendo que Cladonia squamosa é nova citação para o Paraná e C. palmicola para Santa Catarina. Todas as espécies encontradas ocorrem em restingas e sete delas também em costões rochosos. São apresentadas chave de identificação, descrições, comentários e ilustrações.Little is known about the species of Cladonia that occur in the states of Paraná and Santa Catarina, in southern Brazil. Information about the occurrence of lichens in restinga (a type of coastal vegetation in Brazil is very scarce and there are no records from rocky shores. The main goal of the present work was to make an intensive survey of Cladonia species that grow in restinga and on the rocky shores of this region. Nine species belonging to Supergroups Cocciferae, Crustaceae and Perviae were found, and two of them were new records: Cladonia squamosa for Paraná and C. palmicola for Santa Catarina. All of the species recorded occur in restinga and seven of them are also found along rocky shores. An identification key, descriptions, comments and illustrations are provided.

  5. Brain architecture of the largest living land arthropod, the Giant Robber Crab Birgus latro (Crustacea, Anomura, Coenobitidae: evidence for a prominent central olfactory pathway?

    Directory of Open Access Journals (Sweden)

    Krieger Jakob

    2010-09-01

    Full Text Available Abstract Background Several lineages within the Crustacea conquered land independently during evolution, thereby requiring physiological adaptations for a semi-terrestrial or even a fully terrestrial lifestyle. Birgus latro Linnaeus, 1767, the giant robber crab or coconut crab (Anomura, Coenobitidae, is the largest land-living arthropod and inhabits Indo-Pacific islands such as Christmas Island. B. latro has served as a model in numerous studies of physiological aspects related to the conquest of land by crustaceans. From an olfactory point of view, a transition from sea to land means that molecules need to be detected in gas phase instead of in water solution. Previous studies have provided physiological evidence that terrestrial hermit crabs (Coenobitidae such as B. latro have a sensitive and well differentiated sense of smell. Here we analyze the brain, in particular the olfactory processing areas of B. latro, by morphological analysis followed by 3 D reconstruction and immunocytochemical studies of synaptic proteins and a neuropeptide. Results The primary and secondary olfactory centers dominate the brain of B. latro and together account for ca. 40% of the neuropil volume in its brain. The paired olfactory neuropils are tripartite and composed of more than 1,000 columnar olfactory glomeruli, which are radially arranged around the periphery of the olfactory neuropils. The glomeruli are innervated ca. 90,000 local interneurons and ca. 160,000 projection neurons per side. The secondary olfactory centers, the paired hemiellipsoid neuropils, are targeted by the axons of these olfactory projection neurons. The projection neuron axonal branches make contact to ca. 250.000 interneurons (per side associated with the hemiellipsoid neuropils. The hemiellipsoid body neuropil is organized into parallel neuropil lamellae, a design that is quite unusual for decapod crustaceans. The architecture of the optic neuropils and areas associated with antenna two

  6. Crustacea decapoda da praia rochosa da Ilha do Farol, Matinhos, Paraná. I: distribuição temporal de densidade das populações Decapod crustaceans from rocky shore at Farol Island, Matinhos, Paraná, Brazil. I: temporal distribution of population densities

    Directory of Open Access Journals (Sweden)

    Setuko Masunari

    1998-01-01

    Full Text Available A study of the temporal distribution of the decapod populations from a rocky shore at Farol Isle, Matinhos, State of Paraná, Brazil (25o51'S e48o32'W was carried out. The rocky shore is 13m wide when the tidal level is zero meter and about 8o inclination. In the supralittoral, the rocky basins is mostly covered by a layer of litter coming from the terrestrial environment. In the midlittoral and upper infralittoral, the rocky slope is overlayed by boulders and pebbles and they constitute a highly complex environment of crevices, holes and concavities; the underlayer pebbles are embedded in sand, gravel and mud. In the infralittoral fringe, macrocospic algae grow as a continuous belt. Eight samples were taken by hand, monthly, from May-90 to April-91: two from supralittoral, four from midlittoral and two from infralittoral fringe. The density was calculated as number of individuais per cubic meter of pebble piles. The air temperature oscillated from 13.0oC (May-90 to 27.0oC (March-91, the surface water temperature from 16.0oC (July-90 to 28.0oC (February-91 and salinity from 6.7‰ (November-90 to 29.4‰ (July-90. There were registered 27 species (14 brachyuran crabs, 5 anomuran crabs and 8 caridean. The total density of decapod varied from 309.28 ind.m-3 (June-90 to 1,483.22 ind.m-3 (July-90. The density oscillated according to the temperature or salinity fluctuation only in three species. High densities were correlated to the breeding months in four species. Petrolisthes armatus (Gibbes, 1850 was the most numerous species and its density oscillated from 111.76 ind.m-3 (August-90 to 668.25 ind.m-3 (March-91. Eleven species occurred constantly (at least in 8 months, among which, five had a continuous breeding all year round: Synalpheus fritzmuelleri Coutière, 1909, Alpheus bouvieri A. Milne Edwards, 1878, Menippe nodifrons Stimpson, 1860, Pilumnus dasypodus Kingsley, 1879 and Petrolisthes armatus. Armases angustipes (Dana, 1852, Pachygrapsus transversus (Gibbes, 1850 and Panopeus occidentalis (Saussure, 1857 showed ovigerous females during the warm months, when the surface water temperature was equal or above 24oC, whilst Panopeus americanus Saussure, 1857 and Eurypanopeus abbreviatus Stimpson, 1860, equal or above 20oC. Despite of the constant occurrence of the porcelain crab Petrolisthes galalhinus (Bosc, 1801, it was not possible to infer its breeding period due to the absence of ovigerous females and the presence of juveniles only in a few samples.

  7. A new species of the deep-sea spongicolid genus Spongicoloides (Crustacea, Decapoda, Stenopodidea) and a new species of the glass sponge genus Corbitella (Hexactinellida, Lyssacinosida, Euplectellidae) from a seamount near the Mariana Trench, with a novel commensal relationship between the two genera

    Science.gov (United States)

    Kou, Qi; Gong, Lin; Li, Xinzheng

    2018-05-01

    A new species of the deep-sea spongicolid genus Spongicoloides Hansen, 1908 and a new species of the euplectellid genus Corbitella Gray, 1867 are described and illustrated based on the material recently collected by the remotely operated vehicle 'Faxian' at a seamount near the Mariana Trench. The new deep-sea spongicolid species can be distinguished from the congeneric species by a series of morphological features and the validity of the new species was supported by the molecular phylogenetic analysis. By means of the microscleres of regular hexasters and onychohexasters, the new sponge species can easily be distinguished from other Corbitella species. The new euplectellid sponge species is the host of the new spongicolid shrimp species: this is the first discovery of an association between Spongicoloides and Corbitella. The present study increases the species diversity of both genera as well as yielding new insight into the commensal relationships between spongicolid shrimps and their sponge hosts.

  8. Toxicity evaluation on the drilling fluids used in the Sonda de Campeche, which is the petroleum largest area in Mexico, by using Penaeus setiferus (decapods crustacean) postlarvae; Evaluacion de la toxicidad de los fluidos de perforacion empleados en la sonda de Campeche, zona de mayor productividad petrolera de Mexico, empleando postlarvas de Penaeus setiferus (Crustacea:decapoda)

    Energy Technology Data Exchange (ETDEWEB)

    Munhoz-Mejia, Guilhermo; Medina-Jimenez, Julia M. [Instituto Mexicano de Petroleo, Mexico City (Mexico); Flores-Izaguirre, Alfredo; Gonzalez-Valdes, Magdalena; Leon-Fajardo, J. Rafael Leon [Petroleo Mexicanos (PEMEX) (Mexico)

    1998-07-01

    In this study the LC{sub 50} (96 hours) of different drilling muds (generic and field muds) using Penaeus setiferus in postlarvae stage were evaluated. Also Mysidopsis bahia was used because is applied as reference specie by US EPA but only to evaluate generic muds for comparing results obtained with P. setiferus. Moreover the sensitivity of P.setiferus using lauryl sodium sulfate were realized. A toxicity test procedure using P. setiferus is presented. results with both specie shown similar responses to generic muds evaluations. The mud EPA-83-001 was toxic while the others did not. In case of field muds only two were toxic to P. setiferus because they were formulated with diesel. It is recommended using Penaeus setiferus postlarvae as a reference specie in Mexico because of its elevated sensitivity (similar to Mysidopsis bahia) and reproducibility in toxicity tests. (author)

  9. Estructura de tallas y crecimiento de los cangrejos Callinectes arcuatus y C. bellicosus (Decapoda: Portunidae en la laguna costera Las Guásimas, México

    Directory of Open Access Journals (Sweden)

    Luis Hernández

    2007-03-01

    Full Text Available Presentamos información sobre la estructura de tallas, la relación ancho-peso y los parámetros de crecimiento de las jaibas Callinectes arcuatus y C. bellicosus. Las muestras fueron recolectadas mensualmente con una red de arrastre tipo camaronera durante el día y la noche desde marzo 1998 hasta febrero 2000 en una laguna costera del Golfo de California. C. bellicosus (n= 878 fue más abundante que C. arcuatus (n= 357 y su intervalo de talla de 8.4- 166 mm ancho del caparazón (AC y 9-130 mm AC, respectivamente. Ambas poblaciones son representadas principalmente por jóvenes (75 mm AC entre 37-75 mm AC y adultos entre 76- 90 mm AC. La relación ancho-peso mostró que los machos crecen más que las hembras en ambas especies y se observó una tendencia de crecimiento isométrico. Los parámetros de crecimiento para C. arcuatus estimados con el modelo von Bertalanffy fueron: K= 0.84 año-1, L∞= 140 a -0.12 mm para C. arcuatus, y K= 0.9 año -1, L∞= 169 a -0.11 mm para C. bellicosus. Estos resultados mostraron que la edad relativa a la cual se alcanza el crecimiento máximo es entre los tres y cuatro años de edad para ambas especies.Size frequency distribution and growth of the crabs Callinectes arcuatus and C. bellicosus (Decapoda: Portunidae in Las Guásimas coastal lagoon, Mexico. Information on size frequency distribution, the width-weight relation and growth parameters of the crabs Callinectes arcuatus and C. bellicosus is presented. The data comes from samples taken with a trawl net both day and night on a monthly basis from March 1998 to February 2000 in a coastal lagoon from Gulf of California. C. bellicosus (n= 878 was more abundant than C. arcuatus (n= 357 and its size frequency distribution presented carapace width CW ranges of 8.4-166 mm and 9-130 mm respectively. Both populations were mainly represented by juveniles (75 mm in CW ranging from 37 to 75 mm in CW, and adults (>75 mm in CW between 76 and 90 mm in CW. In both species

  10. Efecto tóxico de DDT y endosulfan en postlarvas de camarón blanco, Litopenaeus vannamei (Decapoda:Penaeidaede Chiapas,México

    Directory of Open Access Journals (Sweden)

    Vicente Castro-Castro

    2005-06-01

    Full Text Available Con el fin de conocer la toxicidad del DDT y endosulfan sobre postlarvas de camarón blanco (Litopenaeus vannaei, se realizaron pruebas de toxicidad aguda en condiciones de laboratorio por 168 h, con temperatura de 29 ± 1 °C, salinidad de 3 ± 1 ‰ y pH en 8 ± 1.Se calculó la concentración letal media (LC50 , la LC50 "incipiente", los tiempos medios de muerte (LT50 , la Máxima Concentración Aceptable del Tóxico (MACT y el "Nivel de Seguridad" (LS; así mismo, en los organismos sobrevivientes se determinó la concentración a la que el crecimiento de los organismos se reduce en un 5 y 50% (CE5 y CE50 . Se evaluaron además las alteraciones en el consumo de oxígeno. El DDT fue 3 veces más tóxico que el endosulfan; sin embargo, los organismos resultaron ser muy sensibles a ambos compuestos. La tasa de crecimiento de las postlarvas disminuyó en un 80 y 50% para el DDT y endosulfan respectivamente. La baja resistencia de las postlarvas al DDT y endosulfan, y las concentraciones de estos compuestos en la laguna, sugieren que si se diera un ingreso adicional de estos plaguicidas al sistema, es muy probable un potencial impacto en la producción de camarón del sistemaToxic efect of DDT and endosulfan in white shrimp postlarvae Litopenaeus vannamei (Decapoda: Penaeidae from Chiapas, Mexico .We analized acute toxicity in white shrimp (Litopenaeus vannamei postlarvae exposed to two chlorinated pesticides, DDT and endosulfan, under laboratory conditions during 168 hours, with controlled temperature (29 ± 1°C, salinity (3 ± 1 ‰ and pH (8 ± 1. Median lethal concentrations (LC50 , "incipient" LC50, median lethal time (LT50 the "maximum acceptable concentration of the toxic compound" (MACT and "the safety level" (SL were determined. The concentration of the compounds at which organism growth was reduced by 5 and 50% (EC5 and EC50 , as well as changes in oxygen consumption patterns were determined in the surviving postlarvae.They were very

  11. Seasonal fluctuations of some biological traits of the invader Caprella scaura (Crustacea: Amphipoda: Caprellidae in the Mar Piccolo of Taranto (Ionian Sea, southern Italy

    Directory of Open Access Journals (Sweden)

    Ermelinda Prato

    2013-03-01

    Full Text Available Caprella scaura is an epifaunal amphipod crustacean that originates in the western Indian Ocean and has spread throughout the world, but very little is known about fundamental aspects of its biology. This paper is the first presentation of its life history traits in an invaded region. The study was conducted in the Mar Piccolo basin (southern Italy, Ionian Sea, over a one-year period. All biological parameters showed a strong seasonal pattern, breeding peaked twice during the year and the number of eggs in the ventral brood pouch ranged from 5 to 72. The sex ratio was generally close to 1:1. A strong correlation between total length of ovigerous females and number of eggs was observed. The mean length of both mature males and mature females was 10.63 and 7.70 mm, respectively. The results of this study showed that the population dynamics of this species was not dissimilar to that of other caprellids or marine epifaunal Crustacea. This caprellid has given rise to a stable population in the Mar Piccolo; it was present all year round in the study area but its density suggests that it is not yet a strong invader.

  12. Origin of the interstitial isopod Microcharon (Crustacea, Microparasellidae from the western Languedoc and the northern Pyrenees (France with the description of two new species

    Directory of Open Access Journals (Sweden)

    Nicole COINEAU

    2013-02-01

    Full Text Available The interstitial groundwater genus Microcharon (Crustacea, Isopoda, Microparasellidae is highly diversified in southern France. A new species, Microcharon boulanouari n. sp. is described from the Aude River, whereas specimens from the Lachein River in the central Pyrenees are reassigned to another species, M. ariegensis new to Science. Microcharon boulanouari n. sp. is closely related to the species of the group rouchi and may belong to the phylogenetic western Mediterranean lineage. The two-step model of colonization and evolution provides an understanding of the origin and age of this stygobite. Microcharon boulanouari n. sp. is derived from marine ancestors that lived in the interstitial littoral shallow bottoms of the Atlantic embayment which covered southwestern France at the very beginning of the early Eocene period. Both the regression of this gulf at the start of the Eocene and the Pyrenees uplift may have played a major role in the evolutionary history through vicariance of Microcharon boulanouari n. sp. and of the northern Pyrenean species of the group rouchi.

  13. On the presence of the Mediterranean endemic Microdeutopus sporadhi Myers, 1969 (Crustacea: Amphipoda: Aoridae in the Gulf of Naples (Italy with a review on its distribution and ecology

    Directory of Open Access Journals (Sweden)

    M. B. SCIPIONE

    2013-10-01

    Full Text Available The species Microdeutopus sporadhi (Crustacea: Amphipoda: Aoridae, endemic of the Mediterranean Sea, was described by Myers in 1969 on material collected from the Aegean Sea in a sheltered environment with high sedimentation rates. A check on the distribution and ecology of M. sporadhi showed that: — although not mentioned in the checklist of amphipods of the Italian seas, it was already found in the central Tyrrhenian Sea in 1983-84 and in the northern Adriatic Sea in 2002-03; — it was rarely found in the Mediterranean Sea, one of the most studied basins as concerns amphipod fauna; but notwithstanding the few records available, the wide ecological spectrum of this species was pointed out. The present study, conducted off the Island of Ischia (Gulf of Naples, Italy, showed the presence of rich and well established populations through time, but only in a peculiar substratum (artificial collectors and environment (low pH values. The species seems to be able to withstand harsh environmental conditions and probably to conceal itself through a cryptic behaviour, escaping traditional sampling methods. The role of rare or hidden species in bio-assessment should be re-evaluated.

  14. Variações ontogênicas e sazonais na dieta de Etropus crossotus Jordan e Gilbert, 1882 (Paralichthydae na baía de Ubatuba-Enseada, Estado de Santa Catarina, Brasil = Ontogenetic and seasons changes in the diet of Etropus crossotus Jordan and Gilbert, 1882 (Paralichthydae at Ubatuba-Enseada Bay, Santa Catarina State, Brazil

    Directory of Open Access Journals (Sweden)

    Matheus Oliveira Freitas

    2011-04-01

    Full Text Available Foram investigadas as variações ontogênicas e sazonais na dieta de Etropus crossotus coletados na baía de Ubatuba-Enseada, Estado de Santa Catarina, Brasil. Redes de arrasto com porta foram utilizadas para as coletas mensais, e 60 exemplares foram coletados entre outubro de 2003 e setembro de 2004. Maior similaridade entre os Índices de Importância Alimentar foi observada entre a primavera e o outono. Crustáceos decápodes representaram 50% dos itens alimentares durante a primavera e outono, e crustáceos anfípodes foram os itens mais representativos no inverno. Maior similaridade entre os IAifoi observada entre as classes 1, 2 e 4, pela alta representatividade de Decapoda, e entre as classes 5, 6 e 7, em função da representatividade de Decapoda e Amphipoda. Os resultados obtidos foram similares a outros estudos realizados na região costeira Sul do Brasil.Ontogenetic and seasonal changes in the diet of Etropus crossotussampled at Ubatuba-Enseada Bay in Santa Catarina State, Brazil were investigated. A trawl net was used for the surveys, and 60 fish were collected monthly during October (2003 and September (2004. The highest similarity of the Alimentary Importance Index (AII wasobserved between spring and autumn. Crustacea Decapoda represented 50% of the feeding items during spring and fall, and Crustacea Amphipoda were the most representative item in winter. The highest AII similarity was observed among length classes 1, 2 and 4, whichwas related to Decapoda representation, and among length classes 5, 6 and 7, because of Decapoda and Amphipoda importance. Results were similar to other studies in the southern coast of Brazil.

  15. (Crustacea) from Verlorenvlei

    African Journals Online (AJOL)

    1994-08-29

    Aug 29, 1994 ... (20°C and higher) at the time of our collecting. Material and .... Remarks: note that the difference in shape of carapaces in .... Scale ~ 1409 11m for G- J; 746 11m for A-C; 424 11m for E, F; 343 11m for D, K-O. R eprodu.

  16. (Stuhlmann, 1891) (Crustacea: Branchiura)

    African Journals Online (AJOL)

    1989-02-06

    Feb 6, 1989 ... Serial sections of Dolops ranarum were used to reconstruct the female reproductive system. The histology of the different regions is ... in a bath at room temperature, releasing the sections before they touched the water. ... the left side of the body, while Grobben (1908) concludes that a single ovary is ...

  17. Distribución espacial y temporal del cangrejo Callinectes sapidus (Decapoda: Portunidae en la Bahía de Chetumal, Quintana Roo, México

    Directory of Open Access Journals (Sweden)

    Héctor J Ortiz-León

    2007-03-01

    sapidus (Decapoda: Portunidae in Chetumal Bay, Quintana Roo, Mexico. In order to determine temporal and spatial distribution patterns of Callinectes sapidus, samplings were carried out during the cold-front (January-February, dry (May-June and rainy (August-September, 2002 climatic seasons, in 30 sampling stations of Chetumal Bay, grouped in sectors A (14 stations, B (eight stations and C (eight stations. In each sampling station crabs were collected from two transects parallel to the coast, each with three traps, separated by 30 m. Sediments were calcareous coarse and medium sand, white or lightly gray. A total of 1 031 specimens were collected. CPEU (Capture Per Effort Unit differed spatially and temporally. Highest CPEU was found in sector C with 1.3 ind∙trap-1, and in the rainy season with 1.1 ind∙trap-1. Population was predominantly composed of male individuals. The male:female ratio was 15:1. Males and adults (group II CPEU was significant different between sectors and climatic seasons. Both males and adults (group II had a greater CPEU in sector C (1.2 ind∙trap-1 and in the rainy season (1.1 ind∙trap-1. Abundance of female and juvenile individuals (group I was low during the sampling period whereas group 0 juvenile individuals were not found. A greater relative frequency between sectors and climatic seasons were observed in 130-139 mm and 140-149 mm size interval (CW. C. sapidus occurred on sandy sediments in Chetumal Bay. Pearson product moment correlations exhibited significant relationships between CPEU and temperature, salinity and dissolved oxygen. In Chetumal Bay, the spatial and temporal distribution of C. sapidus can be related to salinity, temperature, habitat quality, food availability, recruitment and reproduction events of individuals. Rev. Biol. Trop. 55 (1: 235-245. Epub 2007 March. 31.

  18. Single and combined effects of cadmium and arsenate in Gammarus pulex (Crustacea, Amphipoda): Understanding the links between physiological and behavioural responses

    Energy Technology Data Exchange (ETDEWEB)

    Vellinger, Céline, E-mail: celine.vellinger@gmail.com [Laboratoire Interdisciplinaire des Environnements Continentaux (LIEC), CNRS UMR 7360, Université de Lorraine – Metz (France); Gismondi, Eric, E-mail: gismondi.eric@gmail.com [Laboratoire d’Ecologie animale et d’Ecotoxicologie, Institut de Chimie, Université de Liège, Allée du 6 Août 15, B-4000 Sart-Tilman, Liège (Belgium); Felten, Vincent, E-mail: vincent.felten@univ-lorraine.fr [Laboratoire Interdisciplinaire des Environnements Continentaux (LIEC), CNRS UMR 7360, Université de Lorraine – Metz (France); Rousselle, Philippe, E-mail: rousselle@univ-lorraine.fr [Laboratoire Interdisciplinaire des Environnements Continentaux (LIEC), CNRS UMR 7360, Université de Lorraine – Metz (France); Mehennaoui, Kahina, E-mail: meh_kahina@yahoo.fr [Laboratoire Interdisciplinaire des Environnements Continentaux (LIEC), CNRS UMR 7360, Université de Lorraine – Metz (France); Parant, Marc, E-mail: parant@univ-lorraine.fr [Laboratoire Interdisciplinaire des Environnements Continentaux (LIEC), CNRS UMR 7360, Université de Lorraine – Metz (France); Usseglio-Polatera, Philippe, E-mail: usseglio-polatera@univ-lorraine.fr [Laboratoire Interdisciplinaire des Environnements Continentaux (LIEC), CNRS UMR 7360, Université de Lorraine – Metz (France)

    2013-09-15

    Highlights: •Linking physiological to behavioural responses of G. pulex exposed to AsV and/or Cd. •AsV and/or Cd exposure exhibited similar biomarkers responses. •Contamination increases the mobilization of detoxification systems in gammarids. •Both changes in energy reserve use and allocation are involved in gammarid response. •Increased lipid peroxidation could be the cause of increasing gammarid mortality. -- Abstract: This study aimed at investigating the individual and interactive effects of cadmium (Cd) and arsenate (AsV) in Gammarus pulex (Crustacea, Amphipoda) through the use of several biomarkers. Individuals were exposed for 240 h to two concentrations of AsV or Cd alone, and all the possible binary mixtures of these concentrations of AsV and Cd in a complete factorial design. The pattern of the biomarkers’ responses to Cd and AsV alone or in mixture was similar in Gammarus pulex, even if the response intensity varied depending on the tested conditions. G. pulex responded to contamination with increased mobilization of the detoxification systems [i.e. γ-glutamyl-cystein ligase activity (GCL), reduced glutathione content (GSH) and metallothionein concentrations (MT)]. This response seems to imply changes in energy reserve utilization (total lipids and proteins are used prior to glycogen reserves), but also a possible energy reallocation from locomotion to detoxification processes. The observed increase in lipid peroxidation could be relied to the increasing gammarid mortality, despite the higher mobilization of detoxification systems. Even if the outcome of the complex interactions between AsV and Cd remains difficult to unravel, such studies are critically important for better assessing the effects of stressors on organisms, populations and communities in a multi-contamination context of ecosystems.

  19. Lindersin B from Lindernia crustacea induces neuritogenesis by activation of tyrosine kinase A/phosphatidylinositol 3 kinase/extracellular signal-regulated kinase signaling pathway.

    Science.gov (United States)

    Cheng, Lihong; Ye, Ying; Xiang, Lan; Osada, Hiroyuki; Qi, Jianhua

    2017-01-15

    Neurotrophic factors such as nerve growth factor (NGF) play important roles in nervous system. NGF is a potential therapeutic drug for treatment of neurodegenerative diseases. However, because of physicochemical property, NGF cannot pass through the blood-brain barrier (BBB). Hence, small molecules which exhibit NGF-mimic activity and can pass through the BBB are considered to be promising drug candidates for treatment of such diseases. The present study was designed to isolate NGF-mimic substance from extract of natural products, determine their structures and investigate mechanism of action of the active substance. Extract of Lindernia crustacean was partitioned between water and ethyl acetate to obtain water layer and ethyl acetate layer samples, respectively, and then evaluated their neuritogenic activity in PC12 cells. The active sample was separated by open columns, followed by HPLC purification to obtain active compound. Then, specific inhibitors were used to investigate signaling pathway of neurite outgrowth induced by the active compound. Finally, western blot analysis was performed to confirm the pathway proposed by inhibitor experiments. The ethyl acetate layer sample of extract of Lindernia crustacea exhibited significant neuritogenic activity. Two new compounds, named as linderside A and lindersin B, were isolated; their structures were elucidated by spectroscopic and chemical derivatization methods. Linderside A is a cucurbitane glycoside, whereas lindersin B is a cucurbitane triterpenoid. Each compound has an unusual isopentene unit, namely, a double bond bound to an unmodified isopropyl group at the end of cucurbitane triterpenoid side chain. Among them, lindersin B induced significant neurite outgrowth in PC12 cells, while linderside A was inactive against PC12 cells. Western blotting analysis results showed that lindersin B-induced neuritogenic activity depended on the activation of the mitogen-activated protein kinase (MAPK)/extracellular signal

  20. Caracterización de isopodos terrestres (Crustacea: Isopoda y su impacto en cultivos hortícolas de Boyacá

    Directory of Open Access Journals (Sweden)

    John Wilson Martínez

    2014-06-01

    Full Text Available Las “cochinillas de humedad” (Crustacea: isopoda, han ido surgiendo como organismos plaga de importancia en agricultura, en países como Brasil y Argentina, en donde causan daños en soya, girasol y pastos. Recientemente se han detectado en Boyacá, afectando cebolla de bulbo, frijol y frutales. Por lo anterior, fué necesario iniciar la caracterización de las especies presentes y la determinación de su impacto en la producción hortícola en algunos municipios de esta región. Se realizó muestreos en Paipa, Tibasosa, Nobsa y Santa Rosa de Viterbo, para determinar la presencia y diversidad de especies de “cochinilla de humedad”; así como, una encuesta para establecer la percepción que tenían los agricultores del daño de estos crustáceos y las estrategias de manejo empleadas. Se evaluaron 8 veredas en Paipa, 7 en Nobsa, 3 en Tibasosa y 1 en Santa Rosa de Viterbo. Se comprobó la presencia de “cochinillas de humedad” en cultivos de frutales, hortalizas y otros, en los municipios muestreados. Se identificaron las especies: Porcellios caber, Porcellio dilatatus, Porcellio pruinosus, Armadillidium vulgare y Armadillidium nasatum. El daño por estos organismos se evidenció en lechuga, brócoli, repollo, remolacha, espinaca, cebolla, cilantro, durazno, frijol, fresa, maíz y papa, especialmente en semillero. El daño observado fué mordedura en hojas (50%, raíz (32,35%, tallo (20,85% y ramas (2,94%. Se percibió falta de conocimiento de los agricultores en el manejo de las “cochinillas de humedad”, utilizándose insecticidas en un 79,41% de los casos, un manejo orgánico en 2,99% y ningún manejo en el 5,88%.

  1. Eficácia do diflubenzuron no controle de Dolops carvalhoi (Crustacea: Branchiura em jovens pacus Piaractus mesopotamicus (Osteichthyes: Characidae naturalmente infectados - DOI: 10.4025/actascianimsci.v27i2.1235 Diflubenzuron effectiveness in Dolops carvalhoi (Crustacea: Branchiura control in juvenile pacus Piaractus mesopotamicus (Osteichthyes: Characidae naturally infected - DOI: 10.4025/actascianimsci.v27i2.1235

    Directory of Open Access Journals (Sweden)

    Julieta Rodini Engrácia de Moraes

    2005-03-01

    Full Text Available Neste ensaio, avaliou-se a eficácia terapêutica do diflubenzuron contra o crustáceo Dolops carvalhoi (Crustacea: Branchiura em pacus Piaractus mesopotamicus Holmberg 1887 (Osteichthyes: Characidae naturalmente infestados. A droga foi aplicada três vezes na concentração de 2,0 mg/L de água, na forma de banhos com trinta minutos de duração e intervalo de 24 horas. Um grupo controle foi submetido ao mesmo procedimento, sem a adição do fármaco à água. A avaliação parasitológica revelou que a eficácia da droga foi de 97,2%. No grupo tratado houve redução da glicemia, aumento da quantidade de eritrócitos, redução do percentual de células granulocíticas especiais e aumento da quantidade de trombócitos circulantes coincidentes com a eliminação dos parasitos, quando comparado ao grupo controle. Os resultados indicam que ocorreu melhora marcante na saúde dos peixesThis research evaluated the therapeutic efficacy of diflubenzuron against Dolops carvalhoi (Crustacean: Branchiura in Piaractus mesopotamicus (Osteichthyes: Characidae naturally infested. The drug was applied three times, at a dose of 2.0 mg/L of water, in the form of baths within thirty minutes and an interval of 24 hours. A control group was submitted to the same procedure, but without pharmaco in the water. The parasitological evaluation showed that the drug effectiveness was 97.2%. In the treated group there were glycemia reduction, increase in the erythrocyte number, decrease in the percentage of special granulocytic cells and increase in the number of circulant trombocytes similar to the parasites elimination when compared to the control group. Results showed an important improvement in fish health

  2. Variaciones en la condición nutricional de langostas Panulirus argus (Decapoda: Palinuridae en la región este del Golfo de Batabanó, Cuba Variations of the nutritional condition of lobsters Panulirus argus (Decapoda: Palinuridae in Eastern region of the Gulf of Batabanó, Cuba

    Directory of Open Access Journals (Sweden)

    Alexander Lopeztegui Castillo

    2012-03-01

    Full Text Available En Cuba, la región del Golfo de Batabanó es la más importante zona de pesca de langosta debido a que de ella se extrae anualmente alrededor del 70% de la captura nacional. Con el objetivo de determinar variaciones espacio-temporales en la condición nutricional (K de langostas Panulirus argus del Golfo de Batabanó, Cuba, se calculó dicha condición mediante una relación pesolargo (K=Pt/Lt, para lo que se utilizaron ejemplares de cuatro zonas (uno, dos, cuatro y cinco del este del golfo, capturados en los años 1981 y 2010. Se encontró que en todos los casos analizados la condición nutricional fue significativamente mayor en machos que en hembras. Se detectaron variaciones significativas entre zonas en 1981 y 2010. También entre años el estado nutricional de las langostas presenta variaciones significativas, de manera que en 1981 (2.34±0.84g/mm fue mayor que en 2010 (1.96±0.49g/mm. Tanto las variaciones interzonales como las interanuales parecen estar relacionadas con variaciones reportadas en el tipo de fondo y la cobertura vegetal. Variaciones estacionales en la abundancia y distribución de organismos bentónicos que constituyen alimento para las langostas también podrían estar influyendo. Las diferencias entre sexos en cambio, se suponen consecuencia de la metodología utilizada y del dimorfismo sexual característico de esta especie, por cuanto otros métodos de estimación de K que no involucran mediciones morfométricas, no detectan estas diferencias.Variations of the nutritional condition of lobsters Panulirus argus (Decapoda: Palinuridae in Eastern region of the Gulf of Batabanó, Cuba. Nutritional condition can affect survival and growth rate of crustaceans, and this is mostly affected by habitat conditions. This study describes the space-temporary nutritional changes in this commercially important species. With this aim, the variations in the nutritional condition (K of lobsters from four zones (1, 2, 4 and 5 in the Gulf

  3. Profilicollis novaezelandensis n. sp. (Polymorphidae) and two other acanthocephalan parasites from shore birds (Haematopodidae and Scolopacidae) in New Zealand, with records of two species in intertidal crabs (Decapoda: Grapsidae and Ocypodidae).

    Science.gov (United States)

    Brockerhoff, A M; Smales, L R

    2002-05-01

    Profilicollis novaezelandensis n. sp. (Acanthocephala: Polymorphidae) is described from the South Island pied oystercatcher Haematopus ostralegus finschi Martens (Haematopodidae) and the intertidal crab Hemigrapsus crenulatus (Milne Edwards) (Brachyura: Grapsidae) from the South Island of New Zealand. The new species can be distinguished from all the other species of the genus by a combination of the following characters: long neck (13% of total body length for adults) and a subspherical proboscis with 14-16 longitudinal rows of 7-8 hooks. The mud crabs Helice crassa Dana (Grapsidae) and Macrophthalmus hirtipes (Heller) (Ocypodidae) were also harbouring cystacanths and the bar-tailed godwit Limosa lapponica (Linnaeus) (Scolopacidae) juveniles of P. novaezelandensis. This is the first record of brachyuran decapods as intermediate hosts of Acanthocephala from New Zealand. P. antarcticus is recorded from three crab species (Helice crassa, Hemigraspus crenulatus and Macrophthalmus hirtipes) and two bird species (Haematopus o. finschi and Limosa lapponica) in New Zealand. An unidentified species of Plagiorhynchus was also found in two bird species (H. o. finschi and H. unicolor Forster). P. antarcticus and P. novaezelandensis are the first records of Profilicollis from New Zealand.

  4. Asociación entre el tamaño del depredador (pavón, Cichla orinocensis) y la presa (camarón de río, Macrobrachium amazonicum) y sus relaciones morfométricas

    OpenAIRE

    Madrid, Fernando

    2009-01-01

    Se evaluó, a nivel de laboratorio, la asociación entre el tamaño del depredador Pavón Cichla orinocensis (Pisces: Perciformes: Cichlidae) y la presa Camarón de Río Macrobrachium amazonicum (Crustacea: Decapoda: Palaemonidae), con miras a utilizar a este pez como controlador biológico del camarón, que es considerado una plaga por los piscicultores debido a su existencia en cantidades excesivas en los estanques de producción de cachamas en la región centro occidental y los llanos altos de Venez...

  5. Pneumodilation versus laparoscopic Heller's myotomy for achalasia

    LENUS (Irish Health Repository)

    Slattery, E

    2011-08-04

    Boeckxstaens et al. (May 12 issue)1 compare single laparoscopic myotomy with a series of pneumodilation procedures for patients with achalasia. They found no significant difference in outcomes between the two groups, although perforation occurred in 4% of patients in the pneumodilation group and often required emergency treatment. No significant clinical adverse outcomes occurred in the surgical group.\\r\

  6. Coeficientes de utilización digestiva aparente de materia seca, proteína y aminoácidos esenciales de ingredientes terrestres para el camarón del Pacífico Litopenaeus vannamei (Decapoda: Penaeidae

    Directory of Open Access Journals (Sweden)

    Martín Terrazas

    2010-12-01

    Full Text Available Los aminoácidos esenciales y su disponibilidad son importantes en la formulación de alimentos. La digestibilidad de materia seca (DAMS, proteína (DAP y aminoácidos esenciales (DAAA fueron determinados (triplicado para el camarón blanco del Pacífico, Litopenaeus vannamei (15-19g, usando una dieta de referencia con 30% (de cada ingrediente. Los ingredientes evaluados fueron: caseína (CAS, harinas de subproductos avícolas (HSPA y porcícolas (HSPP, gluten de maíz (GLM y trigo (GLT, pasta de soya (PS, harinas de sorgo (HS y trigo (HT. La DAMS y DAP variaron entre 68%-109% y 70%-103%, respectivamente. La DAP en CAS, PS, HT y GLT fue mayor al 90%, en GLM y HSPA superior a 80%; HSPP (76% y HS (70% tuvieron menor digestibilidad. Hubo concordancia entre DAP y DAAA, excepto para Arg en GLM, Fen y Leu en HS, Fen en PS y Lis en HT y HSPA. Se encontró una gran variabilidad en la DAMS, DAP y DAAA en los ingredientes, lo que debe ser tomado en cuenta al formular alimentos para camarón.Apparent digestion coefficients for dry matter, protein and essential amino acids in terrestrial ingredients for Pacific shrimp Litopenaeus vannamei (Decapoda: Penaeidae. Protein quality mainly depends on the essential amino acid (EAA profile, but also on its bioavailability, because EAA digestibility is generally lower than the analyzed amounts. This information is needed in the aquaculture industry for aquafeed formulation. For this purpose, the apparent digestibility coefficients of dry matter, protein, and essential amino acids of eight feedstuffs of terrestrial origin were determined for the juvenile whiteleg shrimp Litopenaeus vannamei (15-19g, using 1% chromic oxide as an inert marker. A reference diet was formulated and produced in the laboratory. Eight experimental diets were prepared each with 30% of one of the experimental ingredients added to the reference diet: casein, porcine byproduct meal poultry byproduct meal, corn meal, wheat gluten meal, soybean

  7. Recurrent achalasia after Heller-Toupet procedure: Laparoscopic extended redo heller myotomy and floppy Dor

    Directory of Open Access Journals (Sweden)

    Golash Vishwanath

    2007-01-01

    Full Text Available Recurrences of symptoms after the surgery for achalasia cardia are not uncommon. There are several causes of recurrences but the early recurrences are speculated to be secondary to incomplete myotomy and late recurrence due to fibrosis after the myotomy or megaesophagus. These recurrences can be managed by regular dilation failing which a redo surgery is indicated. Laparoscopic approach is now standard because of the obvious benefits for patients and surgeons. Extent of myotomy and addition of fundoplication are debatable issue in the management of achalasia cardia but evidence suggests that some kind of fundoplication would be necessary after the complete division of lower esophageal sphincter. We present our experience in a case of recurrent achalasia, secondary to incomplete myotomy managed laparoscopically by extended myotomy and a floppy anterior fundoplication. Patient is asymptomatic six months after the surgery and radiologically there is free passage of barium in the stomach.

  8. Dynamic patterns of zooplankton transport and migration in Catuama Inlet (Pernambuco, Brazil, with emphasis on the decapod crustacean larvae Patrones dinámicos de transporte y migración de zooplancton en el estuario Catuama (Pernambuco, Brasil, con énfasis en las larvas de crustáceos decápodos

    Directory of Open Access Journals (Sweden)

    Ralf Schwamborn

    2008-01-01

    Full Text Available The objective of this study was to quantify and to model zooplankton transport with emphasis on decapod crustacean larvae. Sampling was carried out at three depths with a plankton pump coupled to a 300-/¿m mesh. Current data were obtained with an ADCP. Our data showed the existence of vertically and horizontally heterogeneous current and transport fields. We identified 27 groups of Decapoda (larvae of Sergestidae, Porcellanidae, Upogebiidae, Cari dea, Brachyura. Most of the species and larval phases showed characteristic vertical migration patterns, in phase with the diurnal tidal cycles, thus enhancing retention or export from the estuary.Esta investigación tiene como objetivo cuantificar y modelar el transporte de zooplancton, con énfasis en las larvas de Crustacea Decapoda. El muestreo se realizó a tres profundidades con una bomba de plancton acoplada a una red con malla de 300 /¿m. Se obtuvieron los datos de corrientes con un ADCP. Los datos mostraron la existencia de campos de corrientes y de transporte vertical y horizontal heterogéneos. Se identificaron 27 grupos de Decapoda (larvas de Sergestidae, Porcellanidae, Upogebiidae, Caridea, Brachyura. La mayoría de las especies y fases larvales mostraron patrones de migración vertical característicos, en fase con los ciclos de la marea diurnos, favoreciendo la retención o exportación del estuario.

  9. Potamonautid river crabs (Decapoda, Brachyura, Potamonautidae ...

    African Journals Online (AJOL)

    EMAIL FREE FULL TEXT EMAIL FREE FULL TEXT · DOWNLOAD FULL TEXT DOWNLOAD FULL TEXT · http://dx.doi.org/10.4314/wsa.v27i1.5015 · AJOL African Journals Online. HOW TO USE AJOL... for Researchers · for Librarians · for Authors · FAQ's · More about AJOL · AJOL's Partners · Terms and Conditions of Use ...

  10. Dieta de Leptodactylus latrans (Steffen, 1815 na Serra do Sudeste, Rio Grande do Sul, Brasil

    Directory of Open Access Journals (Sweden)

    Daiane Maria Melo Pazinato

    2011-08-01

    Full Text Available http://dx.doi.org/10.5007/2175-7925.2011v24n4p147 Esse trabalho descreve a dieta de Leptodactylus latrans baseado no conteúdo estomacal de 37 espécimes procedentes do município de Caçapava do Sul, RS, tendo como objetivo analisar qualitativa e quantitativamente essa dieta. As amostras foram coletadas no período de janeiro de 2007 a fevereiro de 2008. A composição da dieta foi analisada sob estereomicroscópio e identificada até o nível de ordem, estando composta por 17 categorias de presas. Coleoptera e Aranae foram os itens mais frequentes com 55% e 22,5% respectivamente. Volumetricamente os itens mais importantes foram Crustacea, Decapoda (15,5% e Amphibia (13,59%.

  11. Brighter than a thousand suns; Heller als tausend Sonnen

    Energy Technology Data Exchange (ETDEWEB)

    Jungk, Robert

    2016-07-01

    This fascinating tangible report applies to all, who live face to face with the greatest danger of the 20th century. It describes the history of the atomic bomb as ''a history of real men'', who were in the summer 1939 yet able to prevent the construction of atomic bombs and the opportunity pass unused: They were moralically and politically out of touch with the threatening new invention. Jungk spreads an overwhelming material, opens up hitherto inaccessible sources, and explains in exciting way the dilemma of famous scientists, who fluctuate between the urge to research and moral distress. What has begun in the the twenties as collegial team work of young scientists, developed to a tragedy. Researchers, who felt committed alone to the scientific progress, saw very soon torn into the tension of power politics, and many of them begun to recognize that they have, how the American atomic physicists Oppenheimer expresses himself, done ''the work of the devil''. Despite sharp attacks Jungk is no moral damnation judgement. He wants to know his book understood as contribution to the large conversation, ''which may perhaps prepare a future without fear''.

  12. Expansion of southern distributional range of Ucides occidentalis (Decapoda: Ucididae and Cardisoma crassum (Decapoda: Gecarcinidae

    Directory of Open Access Journals (Sweden)

    Solange Alemán

    2017-04-01

    Full Text Available Is recorded the species of crabs brachyuran Ucides occidentalis (mangrove crab and Cardisoma crassum (Blue crab or without mouth in the mangroves of San Pedro (Piura, expanding its geographical distribution south of Tumbes, which was the known limit. The habitat of these species is characterized by the presence of two varieties of mangrove trees, Jeli white (Laguncularia racemosa and salty Jeli (Avicenia germinans and halophytic shrub called glass (Batis maritima, it observing that the depth of the burrows is shallow (< 60 cm. Biometric information and some biological aspects of the collected specimens are also presented.

  13. The cavernicolous Oniscidea (Crustacea: Isopoda) of Portugal

    DEFF Research Database (Denmark)

    P. S. Reboleira, Ana Sofia; Gonçalves, Fernando J.; Oromí, Pedro

    2015-01-01

    The study of subterranean Oniscidea in Portugal has been neglected for nearly 70 years, but recent investigations have revealed high diversity. All the terrestrial isopods known from caves of mainland Portugal, including data from the literature and new material, are listed, revealing new biodive...

  14. Diversity of the Monstrilloida (Crustacea: Copepoda)

    Science.gov (United States)

    Suárez-Morales, Eduardo

    2011-01-01

    Monstrilloid copepods are protelean parasites of different groups of marine benthic invertebrates. Only their first naupliar, preadult, and adult phases are planktonic. Monstrilloids are currently represented by more than 115 nominal species contained in four genera. Its taxonomic knowledge has been hampered by nomenclatural and descriptive problems derived from their peculiar ontogeny and poor definitions of taxa. One of the most important difficulties is that of matching males to females. The only reliable methods to link the sexes of a species are the confirmation of particular apomorphies shared by both sexes, finding both sexes in the same host or as a pre-copulatory male-female pair in the plankton, or by the use of molecular markers. A general overview of the morphology of the group and its life cycle is provided herein. Recently, upgraded descriptive standards have been established and the relevance of redescribing taxa based on type and museum specimens has been demonstrated. The rate of species description per decade has had several peaks between 1840 and 2010: (1971–1980, 1991–2000, 2001–2010), each related to the activity of a few researchers. An analysis of the world distribution of published records of the Monstrilloida revealed that the Northeast Atlantic is the best studied region (45% of all records), followed by the Northwestern Atlantic (17%); the least surveyed areas include regions of the southern hemisphere (less than 3%). The Northeast Atlantic region harbors the highest number of known species (32 nominal species), followed by the Caribbean Sea/Gulf of Mexico (24), the Mediterranean/Black Sea (19), Indonesia-Malaysia-Philippines region (17), Japanese waters (17), and the Brazil-Argentina area (16). Other than these generalized patterns, little can be concluded concerning the biogeography of the group. Many species records are doubtful or improbable, and purportedly cosmopolitan nominal species are being revealed as species complexes yet to be studied. PMID:21853055

  15. NA phylogeny of Ryukyus Leucothoidae (Crustacea: Amphipoda)

    NARCIS (Netherlands)

    White, K.N.; Reimer, J.D.

    2012-01-01

    Commensal leucothoid amphipods collected from sponges, ascidians, and coral rubble from the Ryukyu Archipelago, Japan, were investigated using nuclear 18S ribosomal DNA sequences. Analysis of sequences from 21 species in three genera supported the current morphological species designations and the

  16. The Caridean Crustacea of the Canary Islands

    NARCIS (Netherlands)

    Holthuis, L.B.

    1949-01-01

    The present paper is based mainly on material collected at the Canary Islands during the spring of 1947 by Dr. G. Thorson of Universitetets Zoologiske Museum at Copenhagen and Dr. C. O. van Regteren Altena of the Rijksmuseum van Natuurlijke Historie at Leiden. Most of the specimens were collected by

  17. On Parartemia zietziana Sayce (Crustacea Phyllopoda)

    NARCIS (Netherlands)

    Kuenen, D.J.

    1937-01-01

    On his journey to Australia, Prof. Dr. L. G. M. Baas Becking collected several specimens of Parartemia zietziana, which he kindly handed over to me for further examination. As it is a very little known species, the few details given below may add to our somewhat scanty knowledge. Sayce described

  18. Cangrejos Gecarcinidos (Crustacea; Gecarcinidae de Colombia Cangrejos Gecarcinidos (Crustacea; Gecarcinidae de Colombia

    Directory of Open Access Journals (Sweden)

    Prahl Henry von

    1984-09-01

    Full Text Available Diagnostic patterns and figures allow correct identifications of those crabs; also coloration, ecology and their distribution are given. The following crabs are reported for Colombia: Gecarcinus (Gecarcinus ruricola (Linnaeus, 1758, G. (G. lateralis lateralis (Freminville, 1835, G. (G. lateralis quadratus Saussure, 1835, G. (lohngarthia malpilensis Faxon, 1893, Cardisoma guanhumi Latreille, 1825, C. crassum Smith, 1870, Ucides cordatus cordatus (Linnaeus, 1763 and U. cordatus occidentalis. (Ortman, 1898. Se presentan diagnósticos sistemáticos y figuras, que permiten la correcta identificación de estos cangrejos, adicionando notas sobre su coloración, ecología, distribución general y distribución en Colombia.Se reportan las siguientes especies: Gecarcinus (Gecarcinus ruricola (Linnaeus, 1758, G. (G. lateralis lateralis (Freminville, 1835, G. (G. lateralis quadratus Saussure, 1835, G. (lohngarthia malpilensis Faxon, 1839, Cardisoma guanhumi Latreille, 1825, C. crassum Smith, 1870, Ucides cordatus cordatus (Linnaeus, 1763 y U. cordatus occidentalis (Ortman, 1898.   

  19. Population size of Aegla paulensis (Decapoda: Anomura: Aeglidae

    Directory of Open Access Journals (Sweden)

    Felipe P.A Cohen

    2013-09-01

    Full Text Available We used the Schumacher-Eschmeyer method for closed populations to estimate and compare the population size of adults of Aeglapaulensis, from Jaraguá State Park (São Paulo, Brazil, in two periods of the year with contrasting climatic conditions (late winter and late summer. The calculated density of adult individuals was considerably higher in the summer (11.5 ind m-2 than in the winter (6.7 ind m-2. This density difference of adult individuals was attributed to variation in the population structure of coexisting cohorts of adults at each sampling season of the year, due to dissimilarities in the cumulative abundance of recruits that effectively become adults after puberty molt, and difference in longevity between sexes.

  20. Distribution of slipper lobsters (Decapoda: Scyllaridae in Uruguayan waters

    Directory of Open Access Journals (Sweden)

    Fabrizio Scarabino

    2017-09-01

    Full Text Available Abstract Scyllarid lobsters are commonly found in tropical waters with scarce records from temperate zones in the southwestern Atlantic. Here, we provide new information about the distribution of Scyllarides deceptor Holthuis, 1963 along the Uruguayan continental shelf and include a new austral record for Scyllarus depressus (Smith, 1881.

  1. Potential production of the Caribbean spiny lobster (Decapoda, Palinura) fisheries

    OpenAIRE

    Chávez Ortiz, Ernesto Aarón

    2009-01-01

    Spiny lobster Panulirus argus (Latreille, 1804) constitutes the most important fishery of the Caribbean; it accounts for nearly 42,000 tonnes. Evidence suggests that high fishing mortality (F) may have been overexploiting most stocks. An assessment was carried out providing the basis for a sustainable exploitation of the nine most important producing countries. Values were assessed and each fishery was simulated; age structure was reconstructed linking biological, economic, and social variabl...

  2. Tidal exchange of larvae of Sesarma catenata (Decapoda, Brachyura)

    African Journals Online (AJOL)

    The tidal exchange of larvae of the salt-marsh grapsid crab Sesarma catenata was studied in the Swartkops estuary, a tidally driven, shallow estuary in Algoa Bay, South Africa. Plankton samples were collected bimonlhly during spring and neap tides from October to March at the tidal inlet. Samples were collected hourly for ...

  3. Feeding dynamics of Palaemon peringueyi (Decapoda, Caridea) in ...

    African Journals Online (AJOL)

    The feeding ecology of the caridean shrimp Palaemon peringueyi in the temporarily open/closed Kasouga Estuary, Eastern Cape, was examined during summer and winter employing stomach fullness index (SFI) analysis. Mean SFI values for male and female shrimp during summer ranged from 0.85% to 2.36% and from ...

  4. A chronic toxicity test protocol using Caridina nilotica (Decapoda ...

    African Journals Online (AJOL)

    Salinization of freshwater resources is an increasing global problem, yet there is a paucity of chronic salinity tolerance data linked to very few chronic toxicity test protocols. This research aimed to generate a chronic toxicity test protocol and protective salinity tolerance data for the indigenous South African freshwater shrimp ...

  5. Annotated list of marine alien species in the Mediterranean with records of the worst invasive species

    Directory of Open Access Journals (Sweden)

    A. ZENETOS

    2005-12-01

    Full Text Available This collaborative effort by many specialists across the Mediterranean presents an updated annotated list of alien marine species in the Mediterranean Sea. Alien species have been grouped into six broad categories namely established, casual, questionable, cryptogenic, excluded and invasive, and presented in lists of major ecofunctional/taxonomic groups. The establishment success within each group is provided while the questionable and excluded records are commented in brief. A total of 963 alien species have been reported from the Mediterranean until December 2005, 218 of which have been classified as excluded (23% leaving 745 of the recorded species as valid aliens. Of these 385 (52% are already well established, 262 (35% are casual records, while 98 species (13% remain “questionable” records. The species cited in this work belong mostly to zoobenthos and in particular to Mollusca and Crustacea, while Fish and Phytobenthos are the next two groups which prevail among alien biota in the Mediterranean. The available information depends greatly on the taxonomic group examined. Thus, besides the three groups explicitly addressed in the CIESM atlas series (Fish, Decapoda/Crustacea and Mollusca, which are however updated in the present work, Polychaeta, Phytobenthos, Phytoplankton and Zooplankton are also addressed in this study. Among other zoobenthic taxa sufficiently covered in this study are Echinodermata, Sipuncula, Bryozoa and Ascidiacea. On the contrary, taxa such as Foraminifera, Amphipoda and Isopoda, that are not well studied in the Mediterranean, are insufficiently covered. A gap of knowledge is also noticed in Parasites, which, although ubiquitous and pervasive in marine systems, have been relatively unexplored as to their role in marine invasions. Conclusively the lack of funding purely systematic studies in the region has led to underestimation of the number of aliens in the Mediterranean. Emphasis is put on those species that are

  6. Taxocenosis of mollusks and crustaceans on roots of rhizophora mangle (rhizophoraceae) at Cispata Bay, Cordoba, Colombia

    International Nuclear Information System (INIS)

    Quiros R, Jorge Alexander; Arias, Jorge Enrique

    2013-01-01

    Despite the existing knowledge on the ecology of mangroves at Cispata Bay, few studies have focused on the association of invertebrates on red mangrove roots, so between December 2010 and September 2011, it was characterized Taxocenosis of mollusks and crustaceans on roots of rhizophora mangle in two study sites at Cispata Bay, Colombia. For the collections of biological material were randomly taken three red mangrove roots with a diameter homogeneous by sampling station. Mollusks and crustaceans were obtained from the root surface with a scraping knife then were removed and fixed in 10 % formalin for later identification to species using specialized taxonomic keys. of the 12289 individuals collected in the four samples, 10470 belonged to the phylum Mollusca (85,2 %) and the remaining 1819 to subphylum Crustacea (14,8 %). for mollusks were identified 14 species distributed in 11 families and two classes; bivalvia and gastropoda. for crustaceans were identified 24 species distributed in 16 families and four orders; sessillia, decapoda, isopoda and amphipoda. in both sectors sampling mytella charruana, balanuseburneus and crassostrea rhizophorae were the most important species in terms of abundance, however mollusks like m. charruana and B. eburneus have a great ability to adapt and adjust to changing hydroclimatic, which was reflected in the dominance of these species in the sector with the greatest influence Sinu River. The presence of crustaceans Petrolisthes armatus and Aratus pisonii in the sector with more proximity to the Caribbean Sea indicate that are species with great mobility and physiological adaptation mechanisms.

  7. Faunistic assemblages of a sublittoral coarse sand habitat of the northwestern Mediterranean

    Directory of Open Access Journals (Sweden)

    Eva Pubill

    2011-02-01

    Full Text Available The sublittoral megabenthic assemblages of a northwestern Mediterranean coarse sandy beach exploited for the bivalve Callista chione were studied. The spatial and bathymetric variability of its distinctive faunal assemblages was characterised by quantitative sampling performed with a clam dredge. The taxa studied were Mollusca Bivalvia and Gastropoda, Crustacea Decapoda, Echinodermata and Pisces, which accounted for over 99% of the total biomass. Three well-differentiated species assemblages were identified: (1 assemblage MSS (Medium Sand Shallow in medium sand (D50=0.37 mm and shallow waters (mean depth =6.5 m, (2 assemblage CSS (Coarse Sand Shallow in coarse sand (D50=0.62 mm in shallow waters (mean depth =6.7 m, and (3 assemblage CSD (Coarse Sand Deep in coarse sand (D50=0.64 mm in deeper waters (mean depth =16.2 m. Assemblage MSS was characterised by the codominance of the bivalves Mactra stultorum and Acanthocardia tuberculata. C. chione was dominant in both density and biomass in assemblages CSS and CSD. The occurrence of the crab Thia scutellata also characterised assemblage CSS, whereas the occurrence of the sea urchin Echinocardium mediterraneum characterised assemblage CSD. A depth breaking point of around 10 m determined the discontinuity between assemblages CSS and CSD, which was related to the closure depth of the beaches in the study area. Species richness was highest in the coarse sand communities; however, Shannon-Wiener diversity and Pielou equitability indexes were higher in the shallow fine sand community.

  8. Genome Sequences of Marine Shrimp Exopalaemon carinicauda Holthuis Provide Insights into Genome Size Evolution of Caridea.

    Science.gov (United States)

    Yuan, Jianbo; Gao, Yi; Zhang, Xiaojun; Wei, Jiankai; Liu, Chengzhang; Li, Fuhua; Xiang, Jianhai

    2017-07-05

    Crustacea, particularly Decapoda, contains many economically important species, such as shrimps and crabs. Crustaceans exhibit enormous (nearly 500-fold) variability in genome size. However, limited genome resources are available for investigating these species. Exopalaemon carinicauda Holthuis, an economical caridean shrimp, is a potential ideal experimental animal for research on crustaceans. In this study, we performed low-coverage sequencing and de novo assembly of the E. carinicauda genome. The assembly covers more than 95% of coding regions. E. carinicauda possesses a large complex genome (5.73 Gb), with size twice higher than those of many decapod shrimps. As such, comparative genomic analyses were implied to investigate factors affecting genome size evolution of decapods. However, clues associated with genome duplication were not identified, and few horizontally transferred sequences were detected. Ultimately, the burst of transposable elements, especially retrotransposons, was determined as the major factor influencing genome expansion. A total of 2 Gb repeats were identified, and RTE-BovB, Jockey, Gypsy, and DIRS were the four major retrotransposons that significantly expanded. Both recent (Jockey and Gypsy) and ancestral (DIRS) originated retrotransposons responsible for the genome evolution. The E. carinicauda genome also exhibited potential for the genomic and experimental research of shrimps.

  9. Cladocera (Crustacea: Branchiopoda of Cat Tien National Park, South Vietnam

    Directory of Open Access Journals (Sweden)

    Artem Y. Sinev

    2013-08-01

    Full Text Available Cladocera of Cat Tien National Park, South Vietnam, and the surrounding agricultural area, were surveyed during the spring of 2009 (onset of the wet season and autumn 2010 (end of the wet season. The studied water bodies included two large lakes (Bau Sau and Bau Chim, small lakes and ponds, temporary pools, rivers and streams, as well as rice fields and ponds in an agricultural area beyond the boundaries of the National Park. Fifty three species of Cladocera were found, 18 of them new for Vietnam. Distribution and taxonomical status of the species are discussed. Of the recorded species, 58.5% (31 were found only in the National Park, 34% (18 both in the National Park and the agricultural area, and only 7.5% (4 exclusively in the agricultural area. Of the 20 species new for Vietnam, only one was found both in the National Park and the agricultural area, all others were found in the National Park only. Such a difference can be directly attributed to the loss of natural habitats (forest ponds and streams in agricultural areas and to the pollution by pesticides. Our study shows the importance of surveys in pristine and protected areas, for the full evaluation of regional microcrustacean richness.

  10. Deep phylogeny and character evolution in thecostraca (Crustacea: Maxillopoda)

    DEFF Research Database (Denmark)

    Pérez-Losada, Marcos; Høeg, Jens Thorvald; Crandall, Keith A.

    2012-01-01

    published since Darwin's seminal monographs, few studies have tested evolutionary hypotheses about Thecostraca within a phylogenetic context. In this review, we combine a Bayesian phylogenetic method and multilocus sequence data to reconstruct the evolutionary history of 12 key thecostracan phenotypic...

  11. The genus Chlamydotheca Saussure (Crustacea: Ostracoda in northeastern Argentina

    Directory of Open Access Journals (Sweden)

    Analía R. Díaz

    Full Text Available The genus Chlamydotheca Saussure, 1858 is a typical representative of the Neotropical ostracod fauna that occupies lotic and lentic environments including temporary and permanent ponds. Up to the present, four species have been recorded in Argentina: C. iheringi (Sars, C. incisa (Claus and C. leuckarti (Claus, and C. symmetrica (Vávra. Temporary and permanent ponds of this region were sampled for ostracods, using a fine mesh net. Three species belonging to the genus Chlamydotheca were collected of which C. arcuata (Sars is recorded for first time for the Chacoan region. Limb morphology was studied under light microscope and line drawings were made using camera lucida. Valves were photographed under scanning electron microscope and redescriptions of C. arcuata and C. iheringi are provided and distributional aspects of the species sampled are discussed.

  12. Molecular effects of diethanolamine exposure on Calanus finmarchicus (Crustacea: Copepoda)

    Energy Technology Data Exchange (ETDEWEB)

    Hansen, Bjorn Henrik, E-mail: bjorn.h.hansen@sintef.no [SINTEF Materials and Chemistry, Marine Environmental Technology, Brattorkaia 17B, N-7465 Trondheim (Norway); Altin, Dag [BioTrix, N-7022 Trondheim (Norway); Booth, Andy; Vang, Siv-Hege; Frenzel, Max; Sorheim, Kristin Rist; Brakstad, Odd Gunnar [SINTEF Materials and Chemistry, Marine Environmental Technology, Brattorkaia 17B, N-7465 Trondheim (Norway); Storseth, Trond R. [SINTEF Fisheries and Aquaculture, N-7465 Trondheim (Norway)

    2010-08-15

    Alkanolamines are surface-active chemicals used in a wide range of industrial, agricultural and pharmaceutical applications and products. Of particular interest is the use of alkanolamines such as diethanolamine (DEA) in the removal of CO{sub 2} from natural gas and for CO{sub 2} capture following fossil fuel combustion. Despite this widespread use, relatively little is known about the ecotoxicological impacts of these compounds. In an attempt to assess the potential effects of alkanolamines in the marine environment, a key species in the North Atlantic, the planktonic copepod Calanus finmarchicus, was studied for molecular effects following sublethal exposure to DEA. DEA-induced alterations in transcriptome and metabolome profiling were assessed using a suppression subtractive hybridization (SSH) gene library method and high resolution magic angle spinning nuclear magnetic resonance (HR-MAS NMR), respectively. Effects were observed on transcription of genes reportedly involved in lipid metabolism, antioxidant systems, metal binding, and amino acid and protein catabolism. These effects were accompanied by altered expression of fatty acid derivates, amino acids (threonine, methionine, glutamine, arginine, alanine and leucine) and cholines (choline, phosphocholine and glycerophosphocholine). Together, SSH and HR-MAS NMR offer complementary screening tools for the assessment of molecular responses of C. finmarchicus to DEA and can be used in the study of other chemicals and organisms. Concentration-response and time-response relationships between DEA exposure and single gene transcription were investigated using quantitative PCR. Specific relationships were found between DEA exposure and the transcription of genes involved in protein catabolism (ubiquitin-specific protease-7), metal ion homeostasis (ferritin) and defence against oxidative stress ({gamma}-glutamylcysteine synthase, glutathione synthase and Cu/Zn-superoxide dismutase). At the lowest alkanolamine concentration used in these experiments, which corresponded to 0.5% of the LC{sub 50} concentration, no transcriptional effects were observed, giving information regarding the lower molecular effect level. Finally, similar transcription patterns were observed for a number of different genes following exposure to DEA, which indicates analogous mechanisms of toxicity and response.

  13. Introduction to Some Species of Argulus (Crustacea: Branchiura ...

    African Journals Online (AJOL)

    PROF HORSFALL

    2017-12-12

    Dec 12, 2017 ... has been found in Asia, Europe, Africa, Australia and. North, Central, and South .... of Culture Cyprinidae in Pen Culture of Anzali. Lagoon. .... PHM; Wendelaar Bonga, SE (1999). Modulation ... auratus auratus) in India. Biolife.

  14. Comparative ultrastructure of the root system in rhizocephalan barnacles (Crustacea

    DEFF Research Database (Denmark)

    Bresciani, J; Høeg, Jens Thorvald

    2001-01-01

    . The rootlets consist of a cuticle, an epidermis and a subjacent layer of axial cells that often, but not always surround, a central lumen. The rootlets are at all times enclosed in a less than 0.5 microm thick cuticle, which is never molted. The cuticle consists of an inner homogeneous layer with a slightly...... by long septate junctions and exhibit the characteristics of a transporting epithelium. Experiments with acid phosphatase revealed activity both in the epidermis and among the microcuticular projections. The projections may therefore form a domain that is important in absorption and extracellular...... the rootlets towards the external reproductive body. In C. delagei the single, bladder-shaped rootlet lacks both the apical projections in the epidermis, the electron-dense cuticle layer, and the microcuticular projections. We review previous studies on the rhizocephalan root system and discuss functional...

  15. The first hypothelminorheic Crustacea (Amphipoda, Dogielinotidae, Hyalella from South America

    Directory of Open Access Journals (Sweden)

    Stella Rodrigues

    2012-11-01

    Full Text Available Most of known troglobiotic species occur in caves and subterranean environments from great depths. However, recently more attention has been given to other subterranean environments, such as the hypothelminorheic habitats. It comprises the most superficial among all subterranean habitats. This kind of environment is characterized by the constant presence of wet spots, absence of light and very particular abiotic characteristics, comprising unique species. The first hypothelminorheic Amphipoda from South America is here described, a new species of the genus Hyalella which occurs in a wetland on Southern Brazil. The new species differs from other troglobiotics of the genus by the presence of a curved seta on the inner ramus of uropod 1 and elongation of appendices, as the first pair of antennae and peraeopods 6 and 7. However, human impacts in the area where the new species occurs have changed heavily their habitat, which may have led the species to a critical level of threat or even extinction, demonstrating the fragility of this environment.a

  16. Reproductive cycle of Macrobrachium amazonicum females (Crustacea, Palaemonidae

    Directory of Open Access Journals (Sweden)

    CMS. Sampaio

    Full Text Available Macrobrachium amazonicum is considered a favorite Brazilian species of freshwater prawn for cultivation as a result of its quick development and because it is easy to maintain in captivity. The aim of this work is to describe the sexual cycle stages and determine maturation age of the female M. amazonicum, which was collected monthly from June, 2002 to May, 2003 in the Jaguaribe River, Itaiçaba, Ceará. A monthly sample of water was also collected to determine the following parameters: temperature, dissolved oxygen, pH and salinity. A monthly sample of females was selected among the individuals caught, to determine the total weight (W T, carapace length (L C and abdomen+telson length (L A+T and to register the number of non-ovigerous females (NOF and ovigerous females (OF. Determining ovarian maturation stages of M. amazonicum was done in a laboratory by observing macroscopic characters such as coloring, size, location and appearance of ovarians examined by transparent carapace. The first maturation age was determined from the relative frequency of the total length (L T of young and adult females. The environmental parameters of the Jaguaribe River did not hold any influence in the number of individuals collected. A total of 1,337 prawns were sampled, 513 males (38.4% and 824 females (61.6%. The proportion between males and females in the studied population was of 1:1.6. Among the collected females, 492 (50.7% did not carry eggs in their abdomens (NOF and 332 (40.3% carried eggs in their abdomens (OF. There was no record of intact females. Non-ovigerous females with mature ovaries were recorded throughout all the months of collection. The female ovaries were classified as immature (IM, rudimentary (RU, intermediary (IN and mature (M. M. amazonicum females reach their first sexual maturity between 4.5 and 5.5 cm of total length.

  17. [Walking in Crustacea: motor program and peripheral regulation (author's transl)].

    Science.gov (United States)

    Clarac, F; Ayers, J

    1977-01-01

    1. Rock lobsters can walk in all directions. In the present study, we report the organization of the motor output of the three muscles which control the mero-carpopodite joint (M-C): the extensor E, the flexor F and the accuracy flexor FA, during unrestrained locomotion (fig. 1). 2. During lateral walking, movements of the M-C joint provide most of the propulsive force, whereas during forward and backward walking this joint function more as a strut (fig. 2). Corresponding differences are observed in the motor discharge in the different walking modes. During lateral walking, discharge in the M-C extensor and M-C flexor alternates, whereas during forward and backward walking these antagonists are coactivated (fig. 3 and 4). 3. We have also examined the effects of alterations of proprioceptive feedback: the FA tendon has been cut to eliminate MCO afferents during walking. This ablation does not modify the burst period and the temporal structure of the output pattern is largely unaffected (fig. 5, 6 and 7). MCO may influence the motor output of a given muscle depending upon whether it participates in the return stroke or the power stroke.

  18. Introduction to some species of Argulus (Crustacea: Branchiura ...

    African Journals Online (AJOL)

    Journal of Applied Sciences and Environmental Management. Journal Home · ABOUT THIS JOURNAL · Advanced Search · Current Issue · Archives · Journal Home > Vol 21, No 7 (2017) >. Log in or Register to get access to full text downloads.

  19. On freshwater Ostracoda (Crustacea) collected on the Canary Islands

    NARCIS (Netherlands)

    Meisch, Claude; Broodbakker, Nico W.

    1990-01-01

    Les auteurs ont examiné une collection de 38 échantillons d’Ostracodes d’eau douce récoltés par le Prof. J. H. Stock sur les Iles Canaries de 1985 à 1987. Seules quelques espèces ont été trouvées. Cypridopsis lanzarotensis fut décrite par Mallwitz (1984) de l’île de Lanzarote (îles Canaries); c’est

  20. Molecular Phylogeny and Revision of Copepod Orders (Crustacea: Copepoda).

    Science.gov (United States)

    Khodami, Sahar; McArthur, J Vaun; Blanco-Bercial, Leocadio; Martinez Arbizu, Pedro

    2017-08-22

    For the first time, the phylogenetic relationships between representatives of all 10 copepod orders have been investigated using 28S and 18S rRNA, Histone H3 protein and COI mtDNA. The monophyly of Copepoda (including Platycopioida Fosshagen, 1985) is demonstrated for the first time using molecular data. Maxillopoda is rejected, as it is a polyphyletic group. The monophyly of the major subgroups of Copepoda, including Progymnoplea Lang, 1948 (=Platycopioida); Neocopepoda Huys and Boxshall, 1991; Gymnoplea Giesbrecht, 1892 (=Calanoida Sars, 1903); and Podoplea Giesbrecht, 1892, are supported in this study. Seven copepod orders are monophyletic, including Platycopioida, Calanoida, Misophrioida Gurney, 1933; Monstrilloida Sars, 1901; Siphonostomatoida Burmeister, 1834; Gelyelloida Huys, 1988; and Mormonilloida Boxshall, 1979. Misophrioida (=Propodoplea Lang, 1948) is the most basal Podoplean order. The order Cyclopoida Burmeister, 1835, is paraphyletic and now encompasses Poecilostomatoida Thorell, 1859, as a sister to the family Schminkepinellidae Martinez Arbizu, 2006. Within Harpacticoida Sars, 1903, both sections, Polyarthra Lang, 1948, and Oligoarthra Lang, 1948, are monophyletic, but not sister groups. The order Canuelloida is proposed while maintaining the order Harpacticoida s. str. (Oligoarthra). Cyclopoida, Harpacticoida and Cyclopinidae are redefined, while Canuelloida ordo. nov., Smirnovipinidae fam. nov. and Cyclopicinidae fam. nov are proposed as new taxa.

  1. Comparison of oostegite shapes in some gammaroidean species (Crustacea: Amphipoda)

    NARCIS (Netherlands)

    Steele, D.H.

    1990-01-01

    Within the superfamily Gammaroidea oostegites vary from broad (primitive) to narrow (advanced). Broad oostegites are found in members of the Acanthogammaridae, Macrohectopidae and a few of the Gammaridae. Most species of the family Gammaridae have broad anterior oostegites and narrow posterior ones.

  2. Aspects of the biology of Platorchestia fayetta sp. nov. (Crustacea ...

    African Journals Online (AJOL)

    Amphipods form an important component of coastal fauna and this study is focused on the biology of semi-terres- trial Platorchestia fayetta sp. nov. inhabiting sand and wave-cast algae on the north-eastern coast at Poste La Fayette, Mauritius. The population structure, size class variation, sex ratio and female reproductive ...

  3. Epigean freshwater Gammaridae (Crustacea, Amphipoda) from La Gomera (Canary Islands)

    NARCIS (Netherlands)

    Beyer, Gabriele; Stock, Jan H.

    1994-01-01

    Description of two new species of freshwater amphipods from La Gomera (Canary Islands), both found in the higher parts of the island: Chaetogammarus chaetocerus n. sp. and Rhipidogammarus gomeranus n. sp. Both species have distinct Afro- Iberian relationships.

  4. Larval and Juvenile Ascothoracida (Crustacea) from the Plankton

    OpenAIRE

    Grygier, Mark J.

    1988-01-01

    Two kinds of previously recorded ascothoracid larvae from plankton over coral reefs in Hawaii and the Virgin Islands are redescribed as possible representatives of the Lauridae and Petrarcidae, respectively. A bathyal, tropical Atlantic ascothoracid larva from an epibenthic sled sample cannot confidently be identified to family. A planktonic, juvenile ascothoracidan from the eastern Indian Ocean belongs to the genus Synagoga.

  5. CONTRIBUTIONS TO DISTRIBUTION OF TURKISH FRESHWATER ISOPODS (CRUSTACEA: ISOPODA

    Directory of Open Access Journals (Sweden)

    Belgin Çamur-Elipek

    2016-11-01

    Full Text Available This study was carried out to contribute to distribution of freshwater isopods in Marmara Region (including Gökçeada and Bozcaada islands of Turkey. For this aim, it was evaluated the material which was sampled during the years 1991, and 1998-2002 in a total of 37 localities from different water resources in the region. End of the study, it was observed that Asellus aquaticus (L. Racovitza, 1919 is a very common species in the area. Furthermore, subspecies and intersex forms belonging Asellus aquaticus were recorded in some localities.

  6. Asellus (Asellus) monticola en Iran (Crustacea, Isopoda, Asellota, Asellidae)

    NARCIS (Netherlands)

    Henry, Jean-Paul; Magniez, Guy

    1996-01-01

    Asellus (Asellus) monticola monticola Birstein, 1932 has been found in a spring in the extreme NW of Iran. Amplifications of the original description of this valid species, which is clearly distinct from A. aquaticus, are given. Contrary to A. aquaticus, A. monticola appears to be strongly endemic

  7. Distribution and community structure of Ostracoda (Crustacea) in ...

    African Journals Online (AJOL)

    The current study presents the ostracod communities recovered from 26 shallow waterbodies in southern Kenya, combined with an ecological assessment of habitat characteristics. A total of 37 waterbodies were sampled in 2001 and 2003, ranging from small ephemeral pools to large permanent lakes along broad ...

  8. Branchiuran parasites (Crustacea: Branchiura) from fishes in the ...

    African Journals Online (AJOL)

    Fish parasitological surveys, conducted during different times of the year in the Okavango and Upper Zambezi River systems from 1997 to 2013, revealed the presence of five branchiuran species. Dolops ranarum from the Okavango system was found on the skin and in the branchial chambers of 12 fish species. Adults and ...

  9. Additions to the barnacle (Crustacea: Cirripedia) fauna of South Africa

    African Journals Online (AJOL)

    The purpose of this paper is to document recent additions to the South African barnacle (Cirripedia) fauna. New species records were obtained by examining accumulated collections of unidentified material in the Iziko South African Museum, as well as via material collected directly by the authors. Fourteen species, none of ...

  10. A study of the Levantine and Pontic Harpacticoida (Crustacea, Copepoda)

    NARCIS (Netherlands)

    Dov Por, F.

    1964-01-01

    INTRODUCTION Though both are parts of the Mediterranean basin, the eastern Mediterranean and the Black Sea form distinct units from both the hydrographic and the biological points of view. The Levantine basin — delimited by the Anatolian peninsula, the Syrio-Israelian shores and the Egyptian

  11. Behavioral repertory of Trichodactylus panoplus (Crustacea: Trichodactylidae under laboratory conditions

    Directory of Open Access Journals (Sweden)

    Bianca L. Zimmermann

    2009-03-01

    Full Text Available This work describes the behavioral repertory of Trichodactylus panoplus von Martens, 1869, based on the animals' diel activity and the possible substrate preference under laboratory experiments. Three experimental replicates were carried out, each using six animals (three males and three females. There were four periods of observation a day, with a total of 864 observation sessions and 144 hours of experiments. A total of 15 behavioral acts divided into five categories were recorded: feeding, exploration of the environment, immobility, social interaction, and self-grooming. The obtained results suggest that T. panoplus has greater activity during the night (p < 0.05, yet without showing an activity peak. In addition, the acceptance of food does not depend on the photoperiod. There was a significant preference for gravel as the chosen substrate. The Morisita index indicates an aggregated distribution of these animals, confirming their preference for substrate with gravel. The increase in activity at night and the preference for substrate with gravel, which can be used to disguise these individuals, would be associated to some anti-predator strategies of these crabs against visually orientated predators.

  12. Eocene crabs (Crustacea, Brachyura) from Bonaire, Netherlands Antilles

    NARCIS (Netherlands)

    Collins, J.H.S.; Donovan, S.K.

    2005-01-01

    Recently discovered crabs from the Middle to Upper Eocene of northern Bonaire, Netherlands Antilles, include well-preserved carapaces of Montezumella rutteni Van Straelen, originally described from an incomplete holotype. The more comprehensive description of this species provided herein includes

  13. The decapod and stomatopod Crustacea of St Paul's Rocks

    NARCIS (Netherlands)

    Holthuis, L.B.

    1980-01-01

    INTRODUCTION Saint Paul's Rocks (Penedos de São Pedro e São Paulo) are a small group of rocky islets on the mid-Atlantic ridge near the equator, occupying an area of roughly 250 by 425 m. There is no vegetation and, apart from birds and invertebrates, the islands are uninhabited. The Cambridge

  14. A new hypogean Cyathura from New Caledonia (Crustacea, Isopoda, Anthuridea)

    NARCIS (Netherlands)

    Wägele, Johann Wolfgang

    1982-01-01

    Cyathuva numeae n.sp. from New Caledonia is the sixth blind species of the genus Cyathura Norman & Stebbing, 1886, found in hypogean habitats. The new species lives in the interstitia of coastal sand or gravel, like C. milloti Chappuis et al., 1956, from Réunion. A close relationship to the other

  15. Remarkable convergent evolution in specialized parasitic Thecostraca (Crustacea)

    DEFF Research Database (Denmark)

    Pérez-Losada, Marcos; Høeg, Jens Thorvald; Crandall, Keith A

    2009-01-01

    the metamorphosis found in the Facetotecta and Rhizocephala suggests a common evolutionary origin, but until now no comprehensive study has looked at the basic evolution of these thecostracan groups. Results To this end, we collected DNA sequences from three nuclear genes [18S rRNA (2,305), 28S rRNA (2...... analyses indicate a convergent evolution of the very similar and highly reduced slug-shaped stages found during metamorphosis of both the Rhizocephala and the Facetotecta. This provides a remarkable case of convergent evolution and implies that the advanced endoparasitic mode of life known from...

  16. Phylogeny of the Paracalanidae Giesbrecht, 1888 (Crustacea: Copepoda: Calanoida).

    Science.gov (United States)

    Cornils, Astrid; Blanco-Bercial, Leocadio

    2013-12-01

    The Paracalanidae are ecologically-important marine planktonic copepods that occur in the epipelagic zone in temperate and tropical waters. They are often the dominant taxon - in terms of biomass and abundance - in continental shelf regions. As primary consumers, they form a vital link in the pelagic food web between primary producers and higher trophic levels. Despite the ecological importance of the taxon, evolutionary and systematic relationships within the family remain largely unknown. A multigene phylogeny including 24 species, including representatives for all seven genera, was determined based on two nuclear genes, small-subunit (18S) ribosomal RNA and Histone 3 (H3) and one mitochondrial gene, cytochrome c oxidase subunit I (COI). The molecular phylogeny was well supported by Maximum likelihood and Bayesian inference analysis; all genera were found to be monophyletic, except for Paracalanus, which was separated into two distinct clades: the Paracalanus aculeatus group and Paracalanus parvus group. The molecular phylogeny also confirmed previous findings that Mecynocera and Calocalanus are genera of the family Paracalanidae. For comparison, a morphological phylogeny was created for 35 paracalanid species based on 54 morphological characters derived from published descriptions. The morphological phylogeny did not resolve all genera as monophyletic and bootstrap support was not strong. Molecular and morphological phylogenies were not congruent in the positioning of Bestiolina and the Paracalanus species groups, possibly due to the lack of sufficient phylogenetically-informative morphological characters. Copyright © 2013 Elsevier Inc. All rights reserved.

  17. The role of Heller myotomy and POEM for nonachalasia motility disorders.

    Science.gov (United States)

    Schlottmann, F; Shaheen, N J; Madanick, R D; Patti, M G

    2017-04-01

    The best-defined primary esophageal motor disorder is achalasia. However, symptoms such as dysphagia, regurgitation and chest pain can be caused by other esophageal motility disorders such as Diffuse Esophageal Spasm (DES), Nutcracker Esophagus (NE) and the Hypertensive Lower Esophageal Sphincter (HTN-LES). Most patients with DES and HTN-LES who complain of dysphagia improve after a myotomy. Patients with NE whose main complaint is chest pain, often do not have relief of the pain and can even develop dysphagia as a consequence of the myotomy. POEM is a relatively new procedure, and there are no studies with long-term follow-up and no prospective and randomized trials comparing it to surgical myotomy. Overall, the key to success is based on a complete evaluation and a careful patient selection. The best results, regardless of the technique, are in fact obtained in patients with outflow obstruction and impaired esophageal emptying, a picture similar to achalasia. © The Authors 2017. Published by Oxford University Press on behalf of International Society for Diseases of the Esophagus. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.

  18. Per oral endoscopic myotomy vs. laparoscopic Heller myotomy, does gastric extension length matter?

    Science.gov (United States)

    Ramirez, Mauricio; Zubieta, Cecilia; Ciotola, Franco; Amenabar, Alfredo; Badaloni, Adolfo; Nachman, Fabio; Nieponice, Alejandro

    2018-01-01

    To report our experience in POEM vs. LHM, with particular focus on myotomy extension. POEM has been adopted worldwide as a treatment for achalasia. While resolution of dysphagia is above 90%, postoperative reflux ranges from 10 to 57%. Myotomy length has been a controversial topic. Thirty-five cases of POEM were prospectively analyzed and compared retrospectively to the last 35 patients that underwent LHM, from December 2010 to August 2016. Mean follow-up was 10 months (6/32) for POEM and 20 months (6/68) for LHM. All patients with LHM had a myotomy extension ≥3 cm on the gastric side. In POEM cases, extension was defined by direct vision (Hill type II) and never exceeded 2 cm. Follow-up was completed in 100% of patients. Efficacy (ES ≤ 3) was 33/35 (94.2%) for POEM and 32/35 (91.4%) for LHM in a short-term follow-up (p = 1.000) and 31/35 (88.6%) and 27/35 (77.1%), respectively, in a long-term follow-up (p = 1.000), with average ES drop from 9 to 1.2 (p = 0.0001) in POEM vs. 9.2 to 1.3 (p = 0.0001) in LHM. Major Postoperative complications occurred in 1 patient (leak) for LHM and 1 patient (massive capnothorax) in POEM. Hospital stay was shorter for POEM than for LHM (1.3 vs. 2.1, respectively) (p = 0.0001). Symptomatic reflux cases included 7/35 POEM (20%) vs. 6/35 LHM (17.1%) (p = 0.4620). Esophagitis signs in endoscopy appeared in 1/21 POEM (4.7%) vs. 1/22 LHM (4.5%) (p = 1.000). Patients requiring PPI included 8/35 POEM (22.8%) vs. 7/35 LHM (20%) (p = 0.6642). Further treatment (endoscopic dilation) was performed in 10/35 POEM (28.5%) vs. 8/35 LHM (22.8%). A shorter myotomy on the gastric side in POEM may contribute to an acceptable reflux rate with comparable relief of dysphagia. Although our follow-up for POEM is shorter than for LHM, the trends are promising and warrant future prospective studies to address this topic.

  19. Has the Introduction of Laparoscopic Heller Myotomy Altered the Treatment Paradigm of Achalasia?

    Directory of Open Access Journals (Sweden)

    Lorenzo E Ferri

    2005-01-01

    Full Text Available Although surgical myotomy is well established as the most effective and durable treatment for achalasia, wide acceptance of this procedure as a first-line treatment has been hampered by perceived invasiveness and morbidity. Laparoscopic myotomy has significantly reduced surgical trauma and morbidity while maintaining effectiveness. The effect of laparoscopic myotomy on the treatment pattern for achalasia is not currently known. All patients undergoing surgical myotomy in Quebec from 1997 to 2002 were identified from the Régie de l'assurance maladie du Québec billing database; previous endoscopic treatment was documented from 1990 to the time of surgery. Patients were divided into two groups (prelaparoscopy and postlaparoscopy defined by the approximate date when laparoscopic myotomy became generally available in Quebec. A questionnaire examining treatment preference for achalasia was sent to all Quebec gastroenterologists. The number of myotomies performed in Quebec remained stable (prelaparoscopy = 28.7/year; postlaparoscopy = 33/year, but were performed on an older population. The rate of preoperative endoscopic treatment did not differ from prelaparoscopy (29.2% to postlaparoscopy (23.3%. However, the time interval between the last endoscopy and myotomy diminished significantly. Questionnaire response rate was 41% (60 of 147. Although myotomy was recognized as the most effective treatment (54 of 60, only 22 of 60 gastroenterologists would refer a healthy patient for myotomy as initial treatment. Other choices included dilation (33 of 60, Botulinum toxin (two of 60 or calcium channel blockade (three of 60. Despite a decrease in time interval between endoscopic treatment and surgery, no decrease in the rate of existing endoscopic therapies occurred after laparoscopic myotomy became widely available. The benefits and minimal risks associated with laparoscopic myotomy need to be more effectively communicated by referring physicians.

  20. Wound healing of laparoscopic Heller's myotomy with and without an added dor's fundoplication, in pigs

    OpenAIRE

    Azevedo, João Luiz Moreira Coutinho [UNIFESP; Kozu, Fábio Okutani [UNIFESP; Azevedo, Otávio Cansanção [UNIFESP; Paiva, Vanessa Carla [UNIFESP; Silva, Cássio Edvan Paulino da [UNIFESP; Simões, Manuel de Jesus [UNIFESP

    2004-01-01

    OBJETIVO: Comparar a cicatrização da miotomia esofagiana laparoscópica associada ou não à fundocardioplastia de Dor. MÉTODO: Foram utilizados 18 porcos, em três grupos de seis animais. No grupo A foi realizada miotomia esofagiana. No grupo B associou-se plicatura gástrica à miotomia. O grupo C foi sem miotomia. No 21º dia pós-operatório houve moldagem do lume para obter índices de estenose (IE) na região da miotomia (RM) e na transição esôfago-gástrica (I'E'). Foram também estudados aspectos ...