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Sample records for crustacea decapoda trichodactylidae

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

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    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.

  2. Relative growth and morphological sexual maturity size of the freshwater crab Trichodactylus borellianus (Crustacea, Decapoda, Trichodactylidae) in the Middle Paraná River, Argentina

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    Williner, Verónica; Torres, María Victoria; Carvalho, Débora Azevedo; König, Natalia

    2014-01-01

    Abstract The relative growth of a number of morphological dimensions of the South American freshwater crab Trichodactylus borellianus (Trichodactylidae) were compared and related to sexual dimorphism. Crabs were collected from ponds in the Middle Paraná River in Argentina. A regression model with segmented relationship was used to test for relative growth between these measurements where breakpoints infer the body size at which crabs reach sexual maturity. In both sexes the carapace width and the length, height, and thickness of the right and left chelae were measured, as well as the male pleopod length and the female abdomen width. All of these measurements were found to show positive allometry with the exception of the male pleopod length and the left chelae, which did not show a breakpoint. In females the breakpoint for the abdomen width inferred a morphological sexual maturity at carapace width 6.9 mm. In males the break point for the pleopod length was at carapace width 6.6 mm, with that for the chelae measurements was between carapace widths 6.4 and 6.9 mm. The relative growth pattern in Trichodactylus borellianus was found to be similar to that recorded for other species of the family Trichodactylidae. PMID:25561835

  3. The Crustacea Decapoda of Cyprus

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    Lewinsohn, Ch.; Holthuis, L.B.

    1986-01-01

    An account of the species of Crustacea Decapoda so far known from Cyprus, based on (1) material collected during the 1967-1970 Hebrew University - Smithsonian Institution Joint Program "Biota of the Red Sea and the Eastern Mediterranean", (2) Cyprus material from other sources, and (3) published rec

  4. First record of Dilocarcinus pagei Stimpson, 1861 (Decapoda, Trichodactylidae in the state of Minas Gerais, Brazil

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    Valter Monteiro de Azevedo-Santos

    2010-06-01

    Full Text Available Among the species that represent the Trichodactylidae family is Dilocarcinus pagei Stimpson, 1861. This species shows a wide geographic distribution in the central region of South America. In Brazil, D. pagei had already been registered in Amapá, Amazonas, Pará, Mato Grosso, Rondônia, Acre, Mato Grosso do Sul and São Paulo. The present study aimed to register the occurrence of the species in Minas Gerais.

  5. Crescimento do caranguejo de água doce, Dilocarcinus pagei Stimpson (Crustacea, Brachyura, Trichodactylidae Growth of the freshwater crab, Dilocarcinus pagei Stimpson (Crustacea, Brachyura, Trichodactylidae

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    Marcelo A. A. Pinheiro

    2005-09-01

    Full Text Available A biologia de caranguejos de água doce tem sido pouco enfocada na literatura carcinológica, especialmente em relação ao crescimento das espécies da família Trichodactylidae. Este estudo visa determinar as curvas de crescimento em tamanho e peso, bem como a longevidade e a idade na muda pubertária dos caranguejos de água doce Dilocarcinus pagei Stimpson, 1861. As amostras foram obtidas mensalmente na Represa Municipal de São José do Rio Preto (São Paulo, de outubro/1994 a setembro/1996. Os indivíduos tiveram o sexo determinado, sendo também mensurados (LC = largura do cefalotórax e pesados (PE = peso úmido. O crescimento dos indivíduos foi determinado pelo método de distribuição dos exemplares em classes de tamanho, sendo utilizado o programa FiSAT para a determinação das curvas através do ajuste não linear dos dados pelo modelo de Bertalanffy. Foram analisados 962 exemplares (534 machos e 428 fêmeas e as curvas de crescimento em tamanho foram expressas pelas equações LC Machos = 61,7[1-e-0,97(t+0,041] e LC Fêmeas = 57,1[1-e-1,41(t+0,031], enquanto o crescimento em peso foi melhor representado por PE Machos = 65,2[1-e-0,97(t+0,041]3,08 e PE Fêmeas = 44,9[1-e-1,41(t+0,031]2,82. O tamanho assintótico dos machos (61,66 mm foi pouco superior ao das fêmeas (57,09 mm, ocorrendo o inverso para a longevidade, estimada em 2,4 e 2,7 anos, respectivamente. O tamanho máximo estimado com base em 95% do tamanho assintótico foi de 58,6 mm para os machos e 54,2 mm para as fêmeas, valores muito próximos dos maiores tamanhos registrados na natureza para cada sexo (55,8 mm. A muda da puberdade dos machos ocorreu com idade superior à das fêmeas (tMachos = 1,2 anos e tFêmeas = 0,9 anos. Os resultados obtidos neste trabalho são inéditos na literatura carcinológica, sendo de grande valia no manejo populacional e preservação desta espécie, que vem sendo intensamente explorada e usada como isca na pesca esportiva.The biology of

  6. Typtonomenaeusformosanus gen. et sp. nov., a new sponge-associated pontoniine shrimp (Crustacea: Decapoda: Palaemonidae: Pontoniinae) from northern Taiwan.

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    Marin, Ivan; Chan, Tin-Yam

    2013-01-01

    A new genus and species of sponge-associated pontoniine shrimps (Crustacea: Decapoda: Palaemonidae: Pontoniinae) is described from northern part of Formosa Island (Taiwan). The new species can be clearly recognized by convex robust nail-like apices on dactyli of both pereiopods II--a unique morphological structure among pontoniine shrimps. Morphological differences from all known sponge-associated pontoniine genera are discussed.

  7. Relative growth, sexual dimorphism and morphometric maturity of Trichodactylus fluviatilis (Decapoda: Brachyura: Trichodactylidae from Santa Terezinha, Bahia, Brazil

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    Tiago Rozário da Silva

    2014-02-01

    Full Text Available Freshwater crabs are important elements in the aquatic biota of brooks, rivers, lakes and ponds, from both ecological and the socio-economic aspects. Trichodactylidae comprises 51 endemic species from the Neotropical region. Among all the species of this family, Trichodactylus fluviatilis Latreille, 1828 has the widest geographic distribution throughout Brazil. Despite that, there are few published contributions on the biology of this species. The present study investigated the following aspects of T. fluviatilis: relative growth, mean size at onset of morphometric maturity, sexual dimorphism, laterality and heterochely. Specimens were collected monthly from September 2010 through August 2011, from the Velha Eugênia Brook, municipality of Santa Teresinha, State of Bahia. Carapace width (CW, carapace length (CL, major cheliped length (MaCL and minor cheliped length (MiCL, major cheliped height (MaCH and minor cheliped height (MiCH, and width of the fifth abdominal segment (5AB were measured to evaluate the presence of sexual dimorphism; the major difference between the sexes was in the CW vs. 5AB ratio. Heterochely was observed in males and females,with the right cheliped larger than the left in 89% of males and 81% of females. Crab size at the onset of morphometric maturity (= puberty molt was estimated based on the ratio between CL, cheliped dimensions, 5AB and CW (independent variable. Females were larger than males when they reached morphometric maturity in all studied relations. We recommend the use of chelipeds and abdominal width relationships to estimate the size at the morphometric maturity in males and females, respectively.

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

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    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.

  9. Occurence of the Asian shrimp Palaemon macrodactylus in the Southern bight of the North Sea, with a key to the Palaemonidae of North-western Europe (Crustacea: Decapoda: Caridea)

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    d'Udekem d'Azoc, C.; Faasse, M.; Dumoulin, E.; Blauwe, de H.

    2005-01-01

    Het voorkomen van de rugstreepsteurgarnaal Palaemon macrodactylus in de zuidelijke bocht van de Noordzee, met een determinatiesleutel tot de Palaemonidae van Noordwest-Europa (Crustacea: Decapoda: Caridea) In 1999 werd de rugstreepsteurgarnaal Palaemon macrodactylus Rathbun, 1902, een soort

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

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    Lin Feng-Jiau

    2012-11-01

    Full Text Available Abstract Background 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. Results 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. Conclusions Phylogenetic analyses on the mt genome

  11. New distribution ranges and records of caridean shrimps (Crustacea: Decapoda: Caridea from the west coast of Mexico Nuevos intervalos de distribución y registros de camarones carideos (Crustacea: Decapoda: Caridea de la costa oeste de México

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    Michel E. Hendrickx

    2011-04-01

    Full Text Available Geographic records are presented for 24 species of Caridea (Crustacea: Decapoda along Pacific coast of Mexico, in the East Pacific. New records are presented for Psathyrocaris fragilis Wood-Mason, 1893 (from Peru to Mexico, Periclimenes infraspinis (Rathbun, 1902, Pontonia margarita Smith, 1869, Alpheus cristulifrons Rathbun, 1900, Alpheus umbo Kim & Abele, 1988, Automate rugosa Coutière, 1900, and Lysmata californica (Stimpson, 1866 (within the Gulf of California, and Typton hephaestus Holthuis, 1951 (from the Gulf of California to the Gulf of Tehuantepec, Mexico. Aditional records are given that establish the presence of species at intermediate localities within the Gulf of California and along the southwestern coast of Mexico.Se recolectaron especímenes de 24 especies de Caridea (Crustacea: Decapoda en la costa del Pacífico de México, en el Pacífico Este. Nuevos registros geográficos son señalados para Psathyrocaris fragilis Wood-Mason, 1893 (desde Perú hasta México, Periclimenes infraspinis (Rathbun, 1902, Pontonia margarita Smith, 1869, Alpheus cristulifrons Rathbun, 1900, Alpheus umbo Kim & Abele, 1988, Automate rugosa Coutière, 1900 y Lysmata californica (Stimpson, 1866 (en el Golfo de California y para Typton hephaestus Holthuis, 1951 (del Golfo de California hasta el Golfo de Tehuantepec, México. Se proporciona información adicional acerca de la presencia de algunas especies en localidades intermedias en el Golfo de California y a lo largo de la costa suroeste de México.

  12. Descrição de um Novo Decapoda (Natantia, Malacostraca, Crustacea

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    Márcia Aparecida Fernandes dos Reis

    2005-08-01

    Full Text Available A “lobster” fossil from the Riachuelo Formation, Sergipe Sub-basin, is here described and placed in the Decapoda, Infraorder Palinura, based on the flattened carapace and the well-developed abdomen. The specimen is characterized by a dorsal median keel and a keel in each margin of the carapace and abdomen. Field data and petrographic studies suggest that the environment in which the Decapoda lived was probably a place with waves and moderate currents, located behind a sand barrier or in within a lagoon. Apparently, the carbonization process was responsible for specimen preservation.

  13. Crustacea Decapoda captured through a passive collection in a stretch of Rio dos Mangues (Porto Seguro – Bahia – Brazil

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    Rafael Ribeiro Teixeira

    2012-11-01

    Full Text Available This paper aimed to carry out, through passive collection, a survey of Crustacea Decapoda species present in a stretch of Rio dos Mangues (Porto Seguro – Bahia – Brazil, during spring season of 2009. The collections were carried out in five sites, distributed over the final 10km of the river, using traps containing biological bait left underwater for 15h. To assess the abiotic variables, temperature, pH, and conductivity values were measured. A total of 135 individuals was registered, belonging to three species: the shrimps Macrobrachium acanthurus (Wiegmann, 1836 and M. olfersi (Wiegman, 1836, besides the crab Trichodactylus fluviatilis Latreille, 1828. In addition to these, two other crab species were collected: Goniopsis cruentata (Latreille, 1803 and Panopeus lacustris Desbonne, 1867. The highest values were registered in P4 (34.07% of individuals, P1 (23.70%, and P3 (22.96%. Temperature and pH presented a small variation throughout the analyses (respectively, 5.1-5.8 and 25.7-29.1°C. In turn, conductivity differed the estuary point (P5 from the other ones (respectively, 886mS and 41-48mS. No individual was registered in P2. The distribution of species was related to the type of microhabitat and the habit of each of them.

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

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

    An account of a qualitative and quantitative analysis of the planktonic decapoda and stomatopoda collected during R.V Gaveshani Cruises 10, 12, 13 in the Arabian Sea is given. Area surveyed lies between latitudes 07 degrees 00' and 20 degrees 00'N...

  15. Optics and phylogeny: is there an insight? The evolution of superposition eyes in the Decapoda (Crustacea)

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    Gaten, Edward

    1998-01-01

    This paper addresses the use of eye structure and optics in the construction of crustacean phylogenies and presents an hypothesis for the evolution of superposition eyes in the Decapoda, based on the distribution of eye types in extant decapod families. It is suggested that reflecting superposition

  16. First inventory of the Crustacea (Decapoda, Stomatopoda) of Juan de Nova Island with ecological observations and comparison with nearby islands in the Mozambique channel (Europa, Glorieuses, Mayotte)

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    Poupin, J.

    2016-04-01

    Crustacea Decapoda and Stomatopoda are inventoried for the first time in Juan de Nova Island, Iles Eparses, Mozambique channel. In total, 112 species are reported: 69 crabs, 28 anomurans, 11 shrimps, 3 mantis shrimps and 1 lobster. A comparison is made with nearby islands in the Mozambique channel: Glorieuses Islands (157 species), Europa Island (178 species), and Mayotte Island (505 species). The lower species richness at Juan de Nova is explained by the small size of the island and by the difficulties to collect the crustaceans on the reef flat hardly accessible at low tide. The crustaceans are listed by main habitats from land to outer reef (2-20 m). The presence of the coconut crab (Birgus latro), an endangered species vulnerable to human predation, is confirmed.

  17. The freshwater crab, Trichodactylus fluviatilis (Latreille, 1828 (Crustacea, Decapoda, Trichodactylidae, as perceived by the inhabitants of the county of Pedra Branca, Bahia, Brazil

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    Eraldo Medeiros Costa Neto

    2007-03-01

    Full Text Available Freshwater crabs are key elements of the aquatic biota of streams, rivers, lakes, and dams because of their ecological and economic importance. Considering that Trichodactylus fluviatilis (Latreille, 1828 is an important source of food for the human settlements that inhabit the places of its occurrence, this article records, for the first time, an ethnocarcinological study carried out with the inhabitants of Pedra Branca county, Bahia State. Data were obtained from February to June 2005 by means of open-ended interviews using the usual techniques of ethnographical survey. Sixteen women and eleven men were interviewed. Their ages ranged from 25 to 86 years old. The results showed that the ethnocarcinological knowledge about T. fluviatilis is relatively consistent with academic knowledge. Ethnozoological studies that stress the cultural significance of freshwater crustaceans are very important, since they would represent a great contribution to the debate on biodiversity conservation in the environments these animals inhabit.

  18. The freshwater crab, Trichodactylus fluviatilis (Latreille, 1828) (Crustacea, Decapoda, Trichodactylidae), as perceived by the inhabitants of the county of Pedra Branca, Bahia, Brazil

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    Eraldo Medeiros Costa Neto

    2007-01-01

    Freshwater crabs are key elements of the aquatic biota of streams, rivers, lakes, and dams because of their ecological and economic importance. Considering that Trichodactylus fluviatilis (Latreille, 1828) is an important source of food for the human settlements that inhabit the places of its occurrence, this article records, for the first time, an ethnocarcinological study carried out with the inhabitants of Pedra Branca county, Bahia State. Data were obtained from February to June 2005 by m...

  19. OCORRÊNCIA DE Macrobrachium amazonicum (CRUSTACEA, DECAPODA) NA DIETA DE Lysapsus bolivianus (ANURA, HYLIDAE).

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    Mayara Fabiana Melo Furtado; Carlos Eduardo Costa-Campos; Suelique de Souza Queiroz; Kelly Juliana Gaya Correa; Inacia Maria Vieira

    2013-01-01

    A dieta de Lysapsus bolivianus está baseada principalmente em pequenos artrópodes, representados geralmente por Diptera, Collembola e Hemiptera, sendo os crustáceos encontrados ocasionalmente. No presente trabalho registramos a presença de Macrobrachium amazonicum na dieta de L. bolivianus em planície de Inundação no Norte do Brasil. Palavras-chave: dieta, Crustacea, Amazônia Oriental. DOI: http://dx.doi.org/10.18561/2179-5746/biotaamazonia.v3n3p185-187

  20. 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

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    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.

  1. 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

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    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.

  2. Systematic and evolutionary insights derived from mtDNA COI barcode diversity in the Decapoda (Crustacea: Malacostraca.

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    Joana Matzen da Silva

    Full Text Available BACKGROUND: Decapods are the most recognizable of all crustaceans and comprise a dominant group of benthic invertebrates of the continental shelf and slope, including many species of economic importance. Of the 17635 morphologically described Decapoda species, only 5.4% are represented by COI barcode region sequences. It therefore remains a challenge to compile regional databases that identify and analyse the extent and patterns of decapod diversity throughout the world. METHODOLOGY/PRINCIPAL FINDINGS: We contributed 101 decapod species from the North East Atlantic, the Gulf of Cadiz and the Mediterranean Sea, of which 81 species represent novel COI records. Within the newly-generated dataset, 3.6% of the species barcodes conflicted with the assigned morphological taxonomic identification, highlighting both the apparent taxonomic ambiguity among certain groups, and the need for an accelerated and independent taxonomic approach. Using the combined COI barcode projects from the Barcode of Life Database, we provide the most comprehensive COI data set so far examined for the Order (1572 sequences of 528 species, 213 genera, and 67 families. Patterns within families show a general predicted molecular hierarchy, but the scale of divergence at each taxonomic level appears to vary extensively between families. The range values of mean K2P distance observed were: within species 0.285% to 1.375%, within genus 6.376% to 20.924% and within family 11.392% to 25.617%. Nucleotide composition varied greatly across decapods, ranging from 30.8 % to 49.4 % GC content. CONCLUSIONS/SIGNIFICANCE: Decapod biological diversity was quantified by identifying putative cryptic species allowing a rapid assessment of taxon diversity in groups that have until now received limited morphological and systematic examination. We highlight taxonomic groups or species with unusual nucleotide composition or evolutionary rates. Such data are relevant to strategies for conservation of

  3. Padrão de deslocamento do camarão marinho Litopenaeus vannamei (Boone (Crustacea, Decapoda, Penaeidae nas fases clara e escura ao longo de 24 horas Displacement pattern of marine shrimp Litopenaeus vannamei (Boone, 1931 (Crustacea, Decapoda, Penaeidae in light and dark phases during a 24-hour period

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    Cibele S. Pontes

    2006-03-01

    Full Text Available O padrão diário de atividade de Litopenaeus vannamei (Boone, 1931 (Crustacea, Decapoda, Penaeidae é ainda pouco entendido. Com o objetivo de fornecer subsídios para otimizar o manejo nas fazendas de cultivo através do estudo do comportamento deste animal, foram desenvolvidos experimentos com juvenis (7,57 ± 1,01 g, mantidos em aquários (30 l. Para registro da atividade, os aquários foram submetidos a fotoperíodo artificial (fase do claro e do escuro, 12h:12 h, sendo monitorados 16 camarões (33 m² em cada fase, durante 20 dias, em janelas de 15 min a cada hora. A alimentação foi fornecida em horários aleatórios, sendo registrados os deslocamentos horizontal e vertical (focal contínuo e os comportamentos de natação e exploração (focal instantâneo. Os deslocamentos horizontal e vertical dos camarões foram mais acentuados na fase escura, predominando o comportamento de natação. A exploração do substrato ocorreu em ambas fases, acentuando-se entre cinco e sete horas após o acendimento das luzes.Litopenaeus vannamei (Boone, 1931 daily behavior pattern is still poorly understood. With the aim of optimizing the management of shrimp farms through the study of this animal behavior, experiments were performed with juvenile (7.57 ± 1.01, which were marked and kept in aquariums (30 l. To record activity, the aquariums were submitted to an artificial photoperiod (light and dark phases, 12h:12 h, with 16 shrimp (33 m² monitored in each phase for 20 days, for 15-minute periods every hour. Food was provided at random times and a record kept of horizontal and vertical displacement (continuous focal, swimming and exploration behavior (instantaneous focal. The horizontal and vertical displacements of the shrimp were greater during the dark phase, with a predominance of the swimming behavior. Exploration of the substrate occurred in both phases, with a peak between five and seven hours after the lights were turned on.

  4. A rapid assessment of the decapod fauna in the Rio Tahuamanu and Rio Manuripi Basins, with new records of shrimps and crabs for Bolivia (Crustacea, Decapoda, Palaemonidae, Sergestidae, Trichodactylidae

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    Célio Magalhães

    2002-12-01

    Full Text Available Results of a decapad fauna survey canducted during the AquaRAP expeditian to Río Tahuamanu and Río Manuripi Basins, in the Departmentaf Panda, Balivia, in September, 1996 are presented. Ten species of shrimps and crabs, representing three families and six genera were faund. New recards for Balivia were Macrobrachium depressimanum Pereira, 1993, Macrobrachium brasiliense (Heller, 1862, Acetes paraguayensis Hansen, 1919, Sylviocarcinus devillei H. Milne-Edwards, 1853, Sylviocarcinus maldonadoensis (Pretzmann, 1978, and valdivia serrata White, 1847.

  5. Behavioral repertory of Trichodactylus panoplus (Crustacea: Trichodactylidae under laboratory conditions

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    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.

  6. 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)

  7. TECHNICAL NOTE A NEW, VOLUNTEER-BASED, COST EFFECTIVE METHOD FOR ZOOLOGICAL MAPPING: THE PHOTO IDENTIFICATION OF FRESHWATER CRAYFISH (CRUSTACEA: DECAPODA SPECIES AND THE IMPORTANCE OF VOLUNTEERS IN CRAYFISH RESEARCH

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    PUKY M.

    2006-01-01

    Full Text Available The publication of the European Crayfish Atlas within the framework of the CRAYNET programme is a major breakthrough in Decapoda mapping in Europe. The current data base contains information from approximately 60-70% of the 50 km × 50 km squares covering the continent. A new method to improve this situation further is the use of photo identification involving volunteers in the collection of distribution data. The crayfish identification ability of two potential user groups, astacologists and biology teachers/students, was tested using the questionnaire given in Figure 2. One picture (Astacus leptodactylus male was correctly identified by everyone, the others were recognised by 59-94% (astacologists and 30-88% (non-crayfish specialised biology teachers and students. The first European Decapoda photo identification survey proved that the necessary expertise exists in the continent to determine crayfish species from pictures and also that the quality of the pictures is less important than the presence of key details. Photo identification is a low cost and environmental-friendly approach but it also needs special considerations. Volunteers need to be supported in several ways, such as by providing precise and interesting educational material in an easily understandable language describing e.g. the key parts of the body to photograph. However, the general use of digital cameras and even mobile phones/cameras and the Internet is an effective way to launch such surveys as it gives, on one hand, an opportunity for the specialists to check, and if necessary correct, the field identification of less experienced people and, on the other hand, it provides a much larger data base than what is available now by using the data collected by students, conservationists, scouts or other volunteers.

  8. On some species of the genus Nephrops (Crustacea Decapoda)

    NARCIS (Netherlands)

    Holthuis, L.B.

    1964-01-01

    The present note is based in the first place on the Nephropsid material collected by the Australian Fisheries Steamer "Endeavour" in the waters of South and East Australia, while also the West Indian Nephrops specimens in the collections of the U.S. National Museum, Washington, D.C., and the Rijksmu

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

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    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.

  10. The Hermit Crabs (Crustacea Decapoda, Paguridea) of Northwestern North America

    NARCIS (Netherlands)

    Mclaughlin, P.A.

    1974-01-01

    A systematic study has been made of the Paguridea (exclusive of the Lithodidae) from northwestern North America. In addition to the redescriptions of all known species, two subgenera are herein raised to generic rank and a new genus is described. Several systematic problems have been resolved, and h

  11. 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,

  12. On some Indo-westpacific Palaemoninae (Crustacea Decapoda Caridae)

    NARCIS (Netherlands)

    Holthuis, L.B.

    1952-01-01

    Since the publication of my paper on the prawns of the subfamily Palaemoninae collected by the Siboga and Snellius Expeditions (Holthuis, 1950, Siboga Exped., mon. 39a9), I had the opportunity to examine more material of this group, which enabled me to make additions and corrections to the above pap

  13. Foregut morphology of Macrobrachium carcinus (Crustacea, Decapoda, Palaemonidae)

    OpenAIRE

    LIMA, J.F.; GARCIA, J. da S.; Tavares, M.

    2016-01-01

    ABSTRACT Macrobrachium carcinus is a Brazilian native prawn with recognized potential for use in aquaculture activities. The aim of this study was to describe and illustrate in detail the morphology of the M. carcinus foregut. The foregut comprises the mouth, esophagus and stomach. It is lined by a simple cylindrical epithelium overlain by chitinous cuticle. The cardiac chamber is well supplied with muscles and lined with chitin thickened in places to form a complex, articulating set of ossic...

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

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    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.

  15. Review of Palaemoninae (Crustacea: Decapoda: Caridea) from Vietnam, Macrobrachium excepted

    NARCIS (Netherlands)

    Xuan, Van N.

    1992-01-01

    An account is presented of the species of Palaemoninae known from Vietnam, the genus Macrobrachium excluded. Of each species a description or descriptive notes are provided, and the habitat and economic importance are discussed. Illustrations of each species, two of which are new to science, are giv

  16. Shrimps from the Santana Group (Cretaceous: Albian: new species (Crustacea: Decapoda: Dendrobranchiata and new record (Crustacea: Decapoda: Caridea

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    ALLYSSON P. PINHEIRO

    2014-06-01

    Full Text Available The fossil shrimp Araripenaeus timidus n. gen. n. sp. is the first fossil Penaeoidea from Brazil. Here, we describe, illustrate and compare it with Paleomattea deliciosa, a fossil Sergestoidea (Dendrobranchiata previously described from the same region. The material of the early Cretaceous (Albian was collected in the town of Jardim, south of the state of Ceará, in the superior septarian concretion level of the Romualdo Formation. Additionally, a second specimen of Kellnerius jamacaruensis was found in the same site of the Araripe Basin.

  17. Shrimps from the Santana Group (Cretaceous: Albian): new species (Crustacea: Decapoda: Dendrobranchiata) and new record (Crustacea: Decapoda: Caridea).

    Science.gov (United States)

    Pinheiro, Allysson P; Saraiva, Antônio Áf; Santana, William

    2014-04-29

    The fossil shrimp Araripenaeus timidus n. gen. n. sp. is the first fossil Penaeoidea from Brazil. Here, we describe, illustrate and compare it with Paleomattea deliciosa, a fossil Sergestoidea (Dendrobranchiata) previously described from the same region. The material of the early Cretaceous (Albian) was collected in the town of Jardim, south of the state of Ceará, in the superior septarian concretion level of the Romualdo Formation. Additionally, a second specimen of Kellnerius jamacaruensis was found in the same site of the Araripe Basin.

  18. Morfologia setal de Parastacus brasiliensis (von Martens (Crustacea, Decapoda, Parastacidae Setae morphology of Parastacus brasiliensis (von Martens (Crustacea, Decapoda, Parastacidae

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    Ana Cristina Moura Horn

    2004-12-01

    Full Text Available A familia Parastacidae compreende os crustáceos límnicos popularmente conhecidos como lagostins da água doce. Parastacus Huxley, 1879 é o único gênero que ocorre no Brasil, e inclui, no estado do Rio Grande do Sul, a espécie endêmica, Parastacus brasiliensis (von Martens, 1869. Os espécimes foram coletados com armadilhas em um arroio nas cabeceiras da bacia do Rio Gravataí, município de Taquara, Rio Grande do Sul, Brasil. Os animais capturados foram transportados até o Laboratório de Crustáceos Universidade Federal do Rio Grande do Sul e criados em aquários até atingirem o estado adulto. Os espécimes foram dissecados e suas estruturas examinadas por microscopia óptica e desenhados em câmara clara. O material foi ainda preparado para fotografia sob exame com microscópio eletrônico de varredura. Procedeu-se à análise e classificação de todos tipos de setas encontradas nas formas adultas de P. brasilieinsis.The family Parastacidae comprises the limnic crustaceans popularly known as crayfishes or crawfishes. Parastacus Huxley, 1879 is the only genus occurring in Brazil and has an endemic species, Parastacus brasiliensis (von Martens,1869, in Rio Grande do Sul State. The individuals were collected with traps from a brook in the springs of Gravataí basin, Taquara, Rio Grande do Sul State, Brazil. The captured animals were taken to the Universidade Federal do Rio Grande do Sul Carcinology Laboratory and raised to full growth in aquaria. The specimens were dissected, and the setae analysed under optical microscopy and drawn with the aid of a camera lucida. Material was prepared for photography under scanning electron microscope. The analysis and classification of all types of setae in the adult forms of P. brasilieinsis was performed.

  19. Enkele interessante Nederlandse crustacea

    NARCIS (Netherlands)

    Holthuis, L.B.

    1969-01-01

    In de laatste jaren heeft het Rijksmuseum van Natuurlijke Historie enkele vermeldenswaardige Crustacea ontvangen, die uit de Nederlandse wateren en uit de zuidelijke Noordzee afkomstig zijn. Twee van deze bleken tot soorten te behoren die nog niet eerder uit ons land vermeld waren, te weten de

  20. Morphological variation of freshwater crabs Zilchiopsis collastinensis and Trichodactylus borellianus (Decapoda, Trichodactylidae among localities from the middle Paraná River basin during different hydrological periods

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    María Victoria Torres

    2014-11-01

    Full Text Available Measures of hydrologic connectivity have been used extensively to describe spatial connections in riverine landscapes. Hydrologic fluctuations constitute an important macrofactor that regulates other environmental variables and can explain the distribution and abundance of organisms. We analysed morphological variations among individuals of two freshwater crab species, Zilchiopsis collastinensis and Trichodactylus borellianus, from localities of the middle Paraná River basin during two phases of the local hydrological regime. Specimens were sampled at sites (localities of Paraná River, Saladillo Stream, Salado River and Coronda River when water levels were falling and rising. The conductivity, pH, temperature and geographical coordinates were recorded at each site. The dorsal cephalothorax of each crab was represented using 16 landmarks for Z. collastinensis and 14 landmarks for T. borellianus. The Canonical Variate Analyses showed differences in shape (for both species among the crabs collected from the Paraná and Salado Rivers during the two hydrologic phases. We did not find a general distribution pattern for shape among the crab localities. During falling water, the shapes of Z. collastinensis were not related to latitude-longitude gradient (i.e., showing greater overlap in shape, while during rising water the shapes were ordered along a distributional gradient according to geographical location. Contrary, shapes of T. borellianus were related to latitude-longitude during falling water and were not related to distributional gradient during rising water. The cephalothorax shape showed, in general, no statistically significant covariations with environmental variables for either species. These results show that each freshwater crab species, from different localities of the middle Paraná River, remain connected; however, these connections change throughout the hydrologic regime of the floodplain system. This study was useful for delineating how the relation among shapes of crabs of localities varies during two phases of the hydrological regime and for estimating the connections and geographical patterns in the floodplain system.

  1. Feeding ecology of the freshwater crab Trichodactylus borellianus (Decapoda: Trichodactylidae in the floodplain of the Paraná River, southern South America

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    Verónica Williner

    2013-09-01

    Full Text Available Freshwater crabs are not commonly considered to be an important group in trophic webs, and this might be due to a lack of knowledge about their trophic roles in aquatic ecosystems. Trichodactylus borellianus is one of the most common and widely distributed freshwater crabs in the floodplains of the southern South American rivers. The main objective of the present study was to examine the trophic role of T. borellianus, in the floodplain of the Paraná River, and its relationships with the freshwater littoral community. The trophic spectrum of this species was characterized for both sexes and individuals of different sizes (adults and juveniles, throughout daily and seasonal cycles. Samples were collected from the aquatic vegetation of three shallow lakes. The diet composition and the feeding activity of T. borellianus were evaluated through the examination of the stomach contents and their degree of emptiness. This crab species consumed several plant and animal items, including amoebas, rotifers, oligochaetes, copepods, cladocerans, and insect larvae. Moreover, this species consumes filamentous and unicellular algae, diatoms, fungi, and macrophytic remains. The predatory habits varied with the season and time of day, and variations in the feeding activity of the juveniles and adults were detected and documented. The diversity of food items eaten by this crab suggests that its trophic role in the community as an omnivore and opportunistic predator provides a connection among several trophic levels from both aquatic and terrestrial communities.

  2. Morphological variation of freshwater crabs Zilchiopsis collastinensis and Trichodactylus borellianus (Decapoda, Trichodactylidae) among localities from the middle Paraná River basin during different hydrological periods

    Science.gov (United States)

    Torres, María Victoria; Collins, Pablo Agustín; Giri, Federico

    2014-01-01

    Abstract Measures of hydrologic connectivity have been used extensively to describe spatial connections in riverine landscapes. Hydrologic fluctuations constitute an important macrofactor that regulates other environmental variables and can explain the distribution and abundance of organisms. We analysed morphological variations among individuals of two freshwater crab species, Zilchiopsis collastinensis and Trichodactylus borellianus, from localities of the middle Paraná River basin during two phases of the local hydrological regime. Specimens were sampled at sites (localities) of Paraná River, Saladillo Stream, Salado River and Coronda River when water levels were falling and rising. The conductivity, pH, temperature and geographical coordinates were recorded at each site. The dorsal cephalothorax of each crab was represented using 16 landmarks for Zilchiopsis collastinensis and 14 landmarks for Trichodactylus borellianus. The Canonical Variate Analyses showed differences in shape (for both species) among the crabs collected from the Paraná and Salado Rivers during the two hydrologic phases. We did not find a general distribution pattern for shape among the crab localities. During falling water, the shapes of Zilchiopsis collastinensis were not related to latitude-longitude gradient (i.e., showing greater overlap in shape), while during rising water the shapes were ordered along a distributional gradient according to geographical location. Contrary, shapes of Trichodactylus borellianus were related to latitude-longitude during falling water and were not related to distributional gradient during rising water. The cephalothorax shape showed, in general, no statistically significant covariations with environmental variables for either species. These results show that each freshwater crab species, from different localities of the middle Paraná River, remain connected; however, these connections change throughout the hydrologic regime of the floodplain system. This study was useful for delineating how the relation among shapes of crabs of localities varies during two phases of the hydrological regime and for estimating the connections and geographical patterns in the floodplain system. PMID:25561836

  3. Structure and Ultrastructure of the Endodermal Region of the Alimentary Tract in the Freshwater Shrimp Neocaridina heteropoda (Crustacea, Malacostraca.

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    Lidia Sonakowska

    Full Text Available The freshwater shrimp Neocaridina heteropoda (Crustacea, Malacostraca, Decapoda originates from Asia and is one of the species that is widely available all over the world because it is the most popular shrimp that is bred in aquaria. The structure and the ultrastructure of the midgut have been described using X-ray microtomography, transmission electron microscopy, light and fluorescence microscopes. The endodermal region of the alimentary system in N. heteropoda consists of an intestine and a hepatopancreas. No differences were observed in the structure and ultrastructure of males and females of the shrimp that were examined. The intestine is a tube-shaped organ and the hepatopancreas is composed of two large diverticles that are divided into the blind-end tubules. Hepatopancreatic tubules have three distinct zones - proximal, medial and distal. Among the epithelial cells of the intestine, two types of cells were distinguished - D and E-cells, while three types of cells were observed in the epithelium of the hepatopancreas - F, B and E-cells. Our studies showed that the regionalization in the activity of cells occurs along the length of the hepatopancreatic tubules. The role and ultrastructure of all types of epithelial cells are discussed, with the special emphasis on the function of the E-cells, which are the midgut regenerative cells. Additionally, we present the first report on the existence of an intercellular junction that is connected with the E-cells of Crustacea.

  4. Structure and Ultrastructure of the Endodermal Region of the Alimentary Tract in the Freshwater Shrimp Neocaridina heteropoda (Crustacea, Malacostraca).

    Science.gov (United States)

    Sonakowska, Lidia; Włodarczyk, Agnieszka; Poprawa, Izabela; Binkowski, Marcin; Śróbka, Joanna; Kamińska, Karolina; Kszuk-Jendrysik, Michalina; Chajec, Łukasz; Zajusz, Bartłomiej; Rost-Roszkowska, Magdalena Maria

    2015-01-01

    The freshwater shrimp Neocaridina heteropoda (Crustacea, Malacostraca, Decapoda) originates from Asia and is one of the species that is widely available all over the world because it is the most popular shrimp that is bred in aquaria. The structure and the ultrastructure of the midgut have been described using X-ray microtomography, transmission electron microscopy, light and fluorescence microscopes. The endodermal region of the alimentary system in N. heteropoda consists of an intestine and a hepatopancreas. No differences were observed in the structure and ultrastructure of males and females of the shrimp that were examined. The intestine is a tube-shaped organ and the hepatopancreas is composed of two large diverticles that are divided into the blind-end tubules. Hepatopancreatic tubules have three distinct zones - proximal, medial and distal. Among the epithelial cells of the intestine, two types of cells were distinguished - D and E-cells, while three types of cells were observed in the epithelium of the hepatopancreas - F, B and E-cells. Our studies showed that the regionalization in the activity of cells occurs along the length of the hepatopancreatic tubules. The role and ultrastructure of all types of epithelial cells are discussed, with the special emphasis on the function of the E-cells, which are the midgut regenerative cells. Additionally, we present the first report on the existence of an intercellular junction that is connected with the E-cells of Crustacea.

  5. The complete mitochondrial genome of the mantid shrimp Oratosquilla oratoria (Crustacea: Malacostraca: Stomatopoda): Novel non-coding regions features and phylogenetic implications of the Stomatopoda.

    Science.gov (United States)

    Liu, Yuan; Cui, Zhaoxia

    2010-09-01

    The complete mitochondrial (mt) genome sequence of Oratosquilla oratoria (Crustacea: Malacostraca: Stomatopoda) was determined; a circular molecule of 15,783 bp in length. The gene content and arrangement are consistent with the pancrustacean ground pattern. The mt control region of O. oratoria is characterized by no GA-block near the 3' end and different position of [TA(A)]n-blocks compared with other reported Stomatopoda species. The sequence of the second hairpin structure is relative conserved which suggests this region may be a synapomorphic character for the Stomatopoda. In addition, a relative large intergenic spacer (101 bp) with higher A+T content than that in control region was identified between the tRNA(Glu) and tRNA(Phe) genes. Phylogenetic analyses based on the current dataset of complete mt genomes strongly support the Stomatopoda is closely related to Euphausiacea. They in turn cluster with Penaeoidea and Caridea clades while other decapods form a separate group, which rejects the monophyly of Decapoda. This challenges the suitability of Stomatopoda as an outgroup of Decapoda in phylogenetic analyses. The basal position of Stomatopoda within Eumalacostraca according to the morphological characters is also questioned.

  6. Uma armadilha para captura de Porcellanidae (Crustacea, Decapoda do mediolitoral de praias rochosas A trap for capturing porcellanidae (Crustacea, Decapoda from midlittoral of rocky shores

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    Edinalva Oliveira

    1995-01-01

    Full Text Available A simple net trap for capturing agile porcelain crabs living amongst superposed stones of the midlittoral rocky shore was developed. About a hundred pebbles and boulders were dislodged from I m² area and Im depth, so that a pit was formed. A sheet net of Im² and Imm mesh size was spread on the bottom of this pit and the stones were replaced again, like the original condition. After a cicle of high tide (about 12 hours, the same stones in the pit were carefully searched by dislodging and by rinsing them. The porcelain crabs were slowly getting out from the handling stones towards the bottom until they found the net sheet. The net border was lifted and the animais captured. The density of population sampled with the aid of the net trap was about 50% higher than that collected by hand. Also, small size species and early developmental stages were adequately collected in this trap. However, the sampling by hand also showed a good performance, as all species of Porcellanidae known from Farol isle and all developmental stages of those species were registered in this collection methodology.

  7. Crescimento relativo em Uca leptodactyla Rathbun (Crustacea Decapoda Ocypodidae Relative growth in the fiddler crab Uca leptodactyla Rathbun (Crustacea Decapoda Ocypodidae

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    Setuko Masunari

    2003-09-01

    Full Text Available Relative growth of the male major chela and female abdome was studied in a population of the fiddler crab Uca leptodactyla Rathbun, 1898 from Itapoá, Santa Catarina coast, southern Brazil. Major chela length (CMQ was measured from 191 males, and abdomen width (LAB from 128 females. Carapace width (LC was the reference dimension for both sexes, which ranged from 3.9 to 11.5 mm for males, and from 3.15 to 10.65 mm for females. Males grew bigger than females. Relationship between CMQ and LC showed a transition point at 8.35 mm LC in males, and between LA and LC at 7.10 mm LC in females. Growth was allometrically positive in the early ontogenesis and isometric after the puberal molting for both sexes. Regressions between LC and CMQ in males read as: logCMQ = -0,854536 + 2,19. logLC for empirical points at left of critical point and logCMQ = 0,063047 + 1,24. logLC for those at right. In females, this relation was logLAB = -0,603590 + 1,30. logLC and logLAB = -0,361464 + 1,07. logLC, respectively. These body dimensions were connected with reproductive activity of this species.

  8. 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

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    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.

  9. Estrutura populacional e biologia reprodutiva de Parastacus defossus (Crustacea: Decapoda: Parastacidae Population structure and reproductive biology of Parastacus defossus (Crustacea: Decapoda: Parastacidae

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    Clarissa K. Noro

    2008-12-01

    Full Text Available Este trabalho descreve a estrutura populacional e aspectos da biologia reprodutiva de Parastacus defossus Faxon, 1898, uma espécie com hábito fossorial que passa sua vida no interior de galerias subterrâneas. Aproximadamente 30 exemplares foram coletados mensalmente, de janeiro de 2003 a agosto de 2005 na região do Lami, Município de Porto Alegre, Rio Grande do Sul, Brasil. Registrou-se o comprimento mínimo, máximo e médio da carapaça de machos, fêmeas, juvenis e animais com ootestículo. Analisou-se a distribuição de freqüência por classes de tamanho, a proporção sexual, o recrutamento e o período reprodutivo. Foram amostrados um total de 766 exemplares, 315 machos (41,12%, 278 fêmeas (36,30%, 166 juvenis (21,67% e sete animais com ootestículo (0,91%. Machos e fêmeas estiveram presentes durante todos os meses de amostragem e em todas as classes de tamanho, sendo que a maior freqüência de indivíduos foi registrada nas classes de tamanho ente 24 a 30 mm. A maior freqüência de juvenis foi observada na primavera/2003 e verão/2005. Diferenças significativas no tamanho de machos e fêmeas foram registradas apenas nas classes de tamanho entre 26-30 mm. A proporção sexual no período amostral foi de 1:0,88 (x² = 2,3; p > 0,05 e entre as classes de tamanho foram constatadas diferenças significativas nas classes de tamanho 26-28 mm (x² = 5,43; p This study investigates the population structure and the reproductive biology of Parastacus defossus Faxon, 1898, a fossorial species that spends its life inside subterranean tunnels. Around 30 specimens were collected each month in the region of Lami, municipality of Porto Alegre, state of Rio Grande do Sul, Brazil, from January, 2003 to August, 2005. The minimum, the maximum, and the mean carapace length of males, females, juveniles and individuals with ootestis were recorded. The frequency distribution by size classes, the sexual proportion, the recruitment, and the reproductive period were analyzed. A total of 766 specimens were collected, from which 315 were males (41.12%, 278 were females (36.30%, 166 were juveniles (21.67%, and seven individuals had ootestis (0.91%. Males and females were present in all months and in all size classes. The highest frequency of individuals matched the size classes from 24 to 30 mm. The highest frequency of juveniles was recorded during the spring of 2003 and the summer 2005. Significant differences in the size of males and females were recorded in the size classes between 26 and 30 mm. The sex ratio between all males and females was 1:0.88 (x² = 2.3, p > 0.05. The proportion between males and females showed significant differences between the size classes 26-28 mm (x² = 5.43, p < 0.05 and 28-30 mm (x² = 4.77, p < 0.05 carapace length, were the number of males was highest. Of the 278 females, only 17 were ovigerous (6.11% and the reproductive period was clearly restricted to the spring.

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

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    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.

  11. 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

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    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.

  12. New Record of Two Xanthid Crabs (Crustacea: Decapoda: Xanthidae from Korea

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    Lee, Sang-Kyu

    2014-10-01

    Full Text Available Xanthid crabs, decapod crustacean, with the black coloured fingers, are easily found under rocks or stones in the intertidal or subtidal zones. Two xanthids, Etisus laevimanus Randall, 1840 and Paraxanthias elegans (Stimpson, 1858, were newly reported in Korean waters as part of continuous taxonomic studies on crabs. The genus Paraxanthias Odhner, 1925 was also reported for the first time in Korea. Of these, the examined specimen of P. elegans showed eight feathery hairs on the subdistal tip of the first gonopod, which differs from the description of Dai and Yang at 1991. Here, the descriptions and illustrations of these species are provided. Korean Xanthoidea currently consists of 30 species belonging to 25 genera.

  13. Intersexuality in the porcellanid crab Pisidia longicornis (Crustacea: Decapoda: Anomura: Porcellanidae

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    Luciane Augusto de Azevedo Ferreira

    2015-04-01

    Full Text Available Intersex specimens of Pisidia longicornis (Linnaeus, 1767 are recorded for the first time and their secondary sexual characters are analyzed. Of 145 specimens of P. longicornis examined in this study, six were identified as intersex individuals. Of these, three presented male secondary sexual characters, well-developed male gonopores and rudimentary female gonopores, whereas the other three had female secondary sexual characters, with female gonopores being more pronounced than the male ones. The present study provides the first record of intersex porcelain crabs.

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

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    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.

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

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    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.

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

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    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.

  17. 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...

  18. Microcassiope minor (Dana, 1852: a description of the first stage zoea (Crustacea: Decapoda: Brachyura: Xanthidae

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    P.F. CLARK

    2012-12-01

    Full Text Available The first stage zoea of Microcassiope minor (Dana, 1852 is described, illustrated and compared with thirteen other known Xanthinae. This comparison suggests that M. minor is closely related to another Atlantic Ocean xanthid, Nanocassiope melanodactyla (A. Milne-Edwards, 1867. Such an affinity may indicate that the genus Nanocassiope Guinot, 1967 is not a homogenous taxon.

  19. Macrurans (Crustacea, Decapoda) from the Lower Triassic (Olenekian) of the Ambilobé area (NW Madagascar)

    NARCIS (Netherlands)

    Garassino, Alessandro; Pasini, Giovanni; Teruzzi, Giorgio

    2003-01-01

    Fossil decapods of the Lower Triassic marine strata of Madagascar are reviewed. These display affiliation to the dendrobranchiates. These include Antrimpos madagascariensis, two species of Ifasya (I. madagascariensis and I. straeleni) and Ambilobeia karojoi.

  20. 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...

  1. Athanas manticolus sp. nov., a new stomatopod-associated alpheid shrimp from Vietnam (Crustacea, Decapoda).

    Science.gov (United States)

    Duriš, Zdenek; Anker, Arthur

    2014-04-01

    A new species of the alpheid shrimp genus Athanas Leach, 1814 is described based on a single specimen, an ovigerous female from Nha Trang Bay, Vietnam. Athanas manticolus sp. nov. differs from all other species of Athanas by the presence of a small post-rostral tubercle, combined with a minutely toothed rostrum, reduced extra-corneal teeth, and the absence of infra-corneal and supra-corneal teeth. In addition, the new species is characterised by its unique colour pattern, particularly by the red chromatophores disposed in randomly oriented, short, narrow streaks. As its name suggests, A. manticolus sp. nov. is commensally associated with the burrows of the nannosquillid mantis shrimp Bigelowina phalangium (Fabricius, 1798).

  2. Genesis of Hematopoietic Tissue and Its Relation with Hemocytes of Litopenaeus Vannamei (Boone, 1931 (Crustacea: Decapoda

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    Faiz Muhammad§, Zhi-Feng Zhang*, Ming-Yu Shao, Xiao-Li Shi and Muhammad Shafi

    2013-01-01

    Full Text Available The Litopenaeus vannamei is a prime aquaculture species and has a worth market value all over the world. In this study, we investigated the genesis and morphology of hematopoietic tissue (HPT and types of hemocyte based on its morphology and cytochemical feature using histological and histochemical methods. The results revealed that HPT in L. vannamei is not visible histologically in mysis and early two post larvae (P1 & P2, and emerges in P3 which locates in epigastric region. The HPT showed a continuous propagation of cells in successive post larval stages. Four types of cells can be identified in the HPT from adult specimen and mitotic activity is visible in the HPT. The hemocytes have been differentiated into five types and some of these types are co-related with the HPT cells. The cytochemical studies suggested that type I and II cells of hemocytes are PAS positive while scanty presence of prophenoloxidase was observed in type I cells. Similarly the type I cells are Sudan Black B positive and rest of the cells showed weak activity against lipid detective stain. This is the first effort towards genesis of HPT and its relation with circulating hemocytes in L. vannamei.

  3. Description of laboratory reared first zoea of Callinectes danae Smith (Crustacea, Decapoda, Portunidae)

    OpenAIRE

    Cheruparambil Sankarankutty; Sung Yun Hong; Kwang Bong Kim

    1999-01-01

    A detailed description of laboratory reared first zoea larva of Callinectes danae Smith, 1869 is given. The larvae utilized for this study were reared in vitro in a special incubator. A comparison with larvae of other species is also attempted.

  4. Estudos sobre a morfologia de Parastacus brasiliensis (von Martens, 1869) (Crustacea, Decapoda, Parastacidae)

    OpenAIRE

    Ana Cristina Moura Horn

    2003-01-01

    A família Parastacidae inclui os crustáceos límnicos conhecidos como lagostins-de-água-doce. A espécie Parastacus brasiliensis (von Martens, 1869) é endêmica da região meridional brasileira, ocorrendo nas bacias que formam o estuário do Guaíba, na depressão central do Estado do Rio Grande do Sul. O presente trabalho reúne um estudo da organização morfológica do lagostim Parastacus brasiliensis. Os animais foram coletados, majoritariamente nas cabeceiras do Rio Gravataí e trazidos ao Laboratór...

  5. A new species of Munidopsis Whiteaves, 1874 (Crustacea: Decapoda: Anomura) from the Northwest Indian Ocean Ridge.

    Science.gov (United States)

    Dong, Dong; Li, Xinzheng; Zhou, Yadong; Wang, Chunsheng

    2016-08-23

    A new species, Munidopsis militaris n. sp., from the Carlsberg Ridge, Northwest Indian Ocean Ridge is described herein. The species belongs to a group of species having a pair of epigastric spines, mesial and lateral eye-spines, abdominal tergites unarmed, five or six spines on the lateral margin of the carapace, and a denticulate carina on the distolateral margin of the P1 fixed finger. It can be distinguished from its relatives by the spinous lateral margin of the palm and dorsal carinae on the P2-4 propodus. The Munidopsis fauna of the Indian Ocean Ridge is seldom reported on; this new species is the sixth member of this genus found inhabiting the Indian Ocean Ridge.

  6. Aspectos ecológicos dos Brachyura (Crustacea: Decapoda no manguezal do Itacorubi, SC - Brasil

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    Joaquim Olinto Branco

    1990-01-01

    Full Text Available Ecological studies including occurrence, relative abundance and spatial distribution of 15 species of Brachyura, as well as the fluctuation in the annual cycle are carried out in mangrove (27º 34' 14" and 27º 35' 31" L.S.; 48º 30' 07"and 48º 31' 33" L. W., during the year 1986. The hydrological parameters temperature, salinity and pH of surface and intersticial waters were also studied. Chasmagnathus granulata was the most abundant specie, followed by Uça uruguayensis, Aratus pisonii and Callinectes danae. The number of males was higher than females. In the spring a larger rate of Catches occurred. The species Eurytium limosum, Cardisoma guanhumi that had the state of São Paulo as their austral boundaru and Uça maracoani the state of Paraná, have now their boundaries of distribution expanded is for as the City of Florianópolis, in the state of Santa Catarina.

  7. Reproductive variability of Parapandalus narval (Crustacea: Decapoda) along a depth gradient

    Science.gov (United States)

    Thessalou-Legaki, Maria

    1992-12-01

    The variations of the reproductive parameters of Parapandalus narval are studied from a population off Rhodos Island, Greece. Female size (CL), dry weight (FDW) and depth of occurrence are examined as determinants of the reproductive parameters such as the percentage of ovigerous females, the stage of egg maturation, the brood size and the reproductive effort. The percentage of the ovigerous females and the egg maturation are related to depth. More ovigerous, older females with larger eggs in earlier stages of development are found in deeper waters. Nevertheless, brood size or brood dry weight regressions on female size and dry weight, respectively, show that the shallow water reproductive output increases more steeply with size or weight of the females than does that in deeper waters. Finally, the reproductive effort of Parapandalus narval does not seem to be directly related to depth but it is related to the size of the female. Small females have smaller reproductive effort than bigger ones that reach a maximum value.

  8. Depth zonation in a Parapandalus narval (Crustacea, Decapoda, Pandalidae) population from Rhodos Island, Greece

    Science.gov (United States)

    Thessalou-Legaki, Maria; Frantzis, Alexis; Nassiokas, Kostas; Hatzinikolaou, Savas

    1989-09-01

    The population characteristics of Parapandalus narval are related to depth. Sex ratio (females/males and females) decreases with depth, while female size increases. Dry weight of equal sized individuals decreases with depth. For the 23 and 80 + 140 m females, the relative dry weight reduction was estimated to 10·3% and 16·0% compared to that of the 5 m females, respectively. Males (80-220 m) exhibited the greatest reduction of 19·9%. It is suggested that the depth zonation exhibited by the P. narval population is related to habitat differences along the depth range sampled and has to do with the exploitation of the available food resources by different sex and/or size groups.

  9. Food preference in the cultured species, Penaeus monodon Fabricius (Crustacea: Decapoda)

    OpenAIRE

    S. Khanum; Tirmizi, N.M.

    1997-01-01

    The study of food preference is necessitated by the need to promote coastal culture of shrimps in Pakistan. The cultured Penaeus monodon was selected for study. Food preferences have been examined through the analysis of the gut contents. The shrimp shows a seasonal variation in its preference to food and feeding.

  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. Records of Hippa strigillata (Stimpson, 1860 (Crustacea: Decapoda: Hippidae in the SE Gulf of California, Mexico

    Directory of Open Access Journals (Sweden)

    Daniela Ríos-Elósegui

    Full Text Available This paper presents details regarding the collections and records of H. strigillata in the Bay of Mazatlán, SE Gulf of California, Mexico. Samples of H. strigillata were obtained in this bay and suroundings area during different periods and deposited in the collection of UNAM, Mazatlán. Morphometric data, distribution, biological and ecological data were furnished.

  12. 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

  13. Bornean freshwater crabs of the genus Arachnothelphusa gen. nov. (Crustacea: Decapoda: Brachyura: Gecarcinucidae)

    NARCIS (Netherlands)

    Ng, P.K.L.

    1991-01-01

    A new genus, Arachnothelphusa gen. nov., is established for five species of Bornean freshwater crabs (Gecarcinucidae) previously placed in Thelphusula Bott, 1969. One species from Sabah, A. terrapes, is here described as new. The genus is characterised by its long ambulatory legs, shape of the carap

  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. Les processidae (Crustacea Decapoda Natantia) des eaux Européennes

    NARCIS (Netherlands)

    Nouvel, H.; Holthuis, L.B.

    1957-01-01

    PRÉ FACE Au cours d'études sur la biologie des Processa des mers européennes (1937-1944), le premier auteur fut frappé par les différences singulières que présentaient des spécimens qui, en accord avec l'opinion courante, devaient se rapporter à une même espèce. I1 résolut d'approfondir le côté syst

  16. Dead shrimp blues: a global assessment of extinction risk in freshwater shrimps (Crustacea: Decapoda: Caridea.

    Directory of Open Access Journals (Sweden)

    Sammy De Grave

    Full Text Available We present the first global assessment of extinction risk for a major group of freshwater invertebrates, caridean shrimps. The risk of extinction for all 763 species was assessed using the IUCN Red List criteria that include geographic ranges, habitats, ecology and past and present threats. The Indo-Malayan region holds over half of global species diversity, with a peak in Indo-China and southern China. Shrimps primarily inhabit flowing water; however, a significant subterranean component is present, which is more threatened than the surface fauna. Two species are extinct with a further 10 possibly extinct, and almost one third of species are either threatened or Near Threatened (NT. Threats to freshwater shrimps include agricultural and urban pollution impact over two-thirds of threatened and NT species. Invasive species and climate change have the greatest overall impact of all threats (based on combined timing, scope and severity of threats.

  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. 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...

  19. The complete mitogenome of the Norway lobster Nephrops norvegicus (Linnaeus, 1758) (Crustacea: Decapoda: Nephropidae).

    Science.gov (United States)

    Gan, Han Ming; Tan, Mun Hua; Gan, Huan You; Lee, Yin Peng; Austin, Christopher M

    2016-09-01

    The clawed lobster Nephrops norvegicus is an important commercial species in European waters. We have sequenced the complete mitochondrial genome of the species from a partial genome scan using Next-Gen sequencing. The N. norvegicus has a mitogenome of 16,132 base pairs (71.22% A+ T content) comprising 13 protein-coding genes, 2 ribosomal subunit genes, 21 transfer RNAs, and a putative 1259 bp non-coding AT-rich region. This mitogenome is the second fully characterized for the family Nephropidae and the first for the genus Nephrops. The mitogenome gene order is identical to the Maine lobster, Homarus americanus with the exception of the possible loss of the trnI gene.

  20. Morphological and histological studies on the embryonic development of the freshwater prawn, Macrobrachium rosenbergii (Crustacea, Decapoda

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    Madlen M. Habashy

    2012-05-01

    Full Text Available The present work was carried out to describe the embryonic changes during development of the freshwater prawn Macrobrachium rosenbergii based on some morphological and histological features. In addition the biochemical composition of eggs was investigated during the embryonic development of the studied species. Results revealed that eggs of M. rosenbergii completed their development in 20 days at 28.5 ± 0.45 °C. The present investigation showed that primordial germ cells (PGCs were detected early in the examined embryos. In 6.5 days old embryo, a cluster of PGCs occupied the dorso-medial region behind the yolky portion. In addition, the biochemical data indicated that the protein content was significantly increased, while lipid and carbohydrate contents decreased during the embryonic development. The lowest water content was found in the bright orange eggs and reached its highest level in the deep brown eggs. It was noted that the increase in the water content was correlated with the increase in the egg diameters. It was also concluded that, variations in the biochemical compositions of eggs reflected changes in their morphogenesis during the embryonic development.

  1. 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.

  2. Notes on Indo-West Pacific Crustacea Decapoda III to IX

    NARCIS (Netherlands)

    Holthuis, L.B.

    1995-01-01

    Seven short notes: (1) describing a new species of Macrobrachium from Madagascar, (2) synonymizing Chlorotocella leptorhynchus (Stimpson, 1860) with C. spinicaudus (H. Milne Edwards, 1837), (3) synonymizing Rhynchocinetes rugulosus Stimpson, 1860, with R. serratus (H. Milne Edwards, 1837), (4) estab

  3. Brachyura (Crustacea, Decapoda associated to Schizoporella unicornis (Bryozoa, Gymnolaemata in Ubatuba bay (SP, Brazil

    Directory of Open Access Journals (Sweden)

    Fernando L. M. Mantelatto

    1998-01-01

    Full Text Available This work characterizes the composition of Brachyura from Schizoporella unicornis. The samples were collected in 1995 at Itaguá Beach, Ubatuba (SP, at three month intervals, during all seasons from January to December. The Bryozoa colonies were obtained by snorkeling at a depth of five meters in daylight. A total of 323 specimens were collected from four families (Xanthidae, Portunidae, Majidae and Grapsidae. Pachygrapsus transversus, Hexapanopeus schimitti, and Menippe nodifrons occurred in all seasons. The highest and lowest number of individuals occurred during the spring and autumn, respectively. Xanthidae exhibited the highest density during the summer, autumn, and spring, while Grapsidae exhibited the highest density in winter. It was noted the presence of Charibdis hellerii, an portunid from Indo-Pacific ocean. The diversity of species obtained, in addition to an accentuated number of immature and ovigerous females specimens, suggested that Schizoporella colonies were a place of reproduction and development.Este trabalho caracterizou a composição dos braquiúros em Schizoporella unicornis. As amostras foram coletadas na Praia do Itaguá, Ubatuba (SP, em intervalos de três meses, durante as estações climáticas de Janeiro a Dezembro/1995. As colônias de briozoários foram obtidas por mergulho livre, coletadas pela manhã. Um total de 323 espécimes foram coletados dentro de quatro famílias (Xanthidae, Portunidae, Majidae e Grapsidae. Pachygrapsus transversus, Hexapanopeus schimitti e Menippe nodifrons ocorreram em todas as estações. O maior e o menor número de indivíduos foram registrados na primavera e no outono, respectivamente. Xanthidae exibiu maior densidade no verão, outono e primavera, enquanto Grapsidae foi no inverno. Registrou-se a ocorrência de Charibdis hellerii, espécie originária do Indo-Pacífico. A diversidade de espécies obtida, juntamente com o acentuado número de indivíduos imaturos e fêmeas ovígeras, constituem indícios de que colônias de Schizoporella constituem um local de reprodução e desenvolvimento para estes crustáceos

  4. On two species of Archipelothelphusa Bott, 1969 (Crustacea: Decapoda: Brachyura: Sundathelphusidae) from Luzon, Philippines

    NARCIS (Netherlands)

    Ng, P.K.L.

    1991-01-01

    The taxonomic problems concerning freshwater crabs of the genus Archipelothelphusa Bott, 1969 (Gecarcinucoidea: Sundathelphusidae) are discussed. The identity of Para-Bary-thelphusa grapsoides subsp. longipes Balss, 1937, is clarified, and a new species, A. celer spec. nov. is described from Luzon,

  5. Leucosiid crabs (Crustacea: Decapoda: Brachyura) from Taiwan, with three new records.

    Science.gov (United States)

    Shih, Yi-Jia; Ho, Ping-Ho; Chan, Tin-Yam

    2015-12-01

    Four leucosiid species from Taiwan are presented. Ebalia nudipes Sakai, 1963, with its male first gonopod figured for the first time. Galilia petricola Komai & Tsuchida, 2014, is recorded on the basis of a larger specimen, and distinguishing features with its only congener, G. narusei Ng & Richer de Forges, 2007, reappraised. Nursia rhomboidalis (Miers, 1879), previously known only from Japan, Korea, and mainland China, is also recorded from Taiwan. Myra fugax (Fabricius, 1798) is now formally recorded from Taiwan, and female characters identified to help separate the three known Taiwanese species of Myra.

  6. Eight new species of the genus Sinopotamon from Jiangxi Province, China (Crustacea, Decapoda, Brachyura, Potamidae)

    NARCIS (Netherlands)

    Ai-Yun, Dai; Xian-Min, Zhou; Wei-Dong, Peng

    1995-01-01

    Fifteen species of freshwater crabs belonging to the genus Sinopotamon are recorded from Jiangxi Province, S.E. China. Eight species are new to science and these are described: S. xiushuiense, S. jiujiangense, S. wanzaiense, S. anyuanense, S. siguqiaoense, S. linhuanense, S. yushanense and S ninggan

  7. 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.

  8. Morphology of the female reproductive system of European pea crabs (Crustacea, Decapoda, Brachyura, Pinnotheridae).

    Science.gov (United States)

    Becker, Carola; Brandis, Dirk; Storch, Volker

    2011-01-01

    Commensal pea crabs inhabiting bivalves have a high reproductive output due to the extension andfecundity of the ovary. We studied the underlying morphology of the female reproductive system in the Pinnotheridae Pinnotheres pisum, Pinnotheres pectunculi and Nepinnotheres pinnotheres using light microscopy and transmission electron microscopy (TEM). Eubrachyura have internal fertilization: the paired vaginas enlarge into storage structures, the spermathecae, which are connected to the ovaries by oviducts. Sperm is stored inside the spermathecae until the oocytes are mature. The oocytes are transported by oviducts into the spermathecae where fertilization takes place. In the investigated pinnotherids, the vagina is of the "concave pattern" (sensu Hartnoll1968): musculature is attached alongside flexible parts of the vagina wall that controls the dimension of its lumen. The genital opening is closed by a muscular mobile operculum. The spermatheca can be divided into two distinct regions by function and morphology. The ventral part includes the connection with vagina and oviduct and is regarded as the zone where fertilization takes place. It is lined with cuticle except where the oviduct enters the spermatheca by the "holocrine transfer tissue." At ovulation, the oocytes have to pass through this multilayered glandular epithelium performing holocrine secretion. The dorsal part of the spermatheca is considered as the main sperm storage area. It is lined by a highly secretory apocrine glandular epithelium. Thus, two different forms of secretion occur in the spermathecae of pinnotherids. The definite role of secretion in sperm storage and fertilization is not yet resolved, but it is notable that structure and function of spermathecal secretion are more complex in pinnotherids, and probably more efficient, than in other brachyuran crabs.

  9. Nursery performance of the pink shrimp Farfantepenaeus paulensis (Crustacea: Decapoda: Penaeidae postlarvae in different salinities

    Directory of Open Access Journals (Sweden)

    Rafael F. Costa

    2010-06-01

    Full Text Available Nursery performance, development, and RNA:DNA ratio were investigated in Farfantepenaeus paulensis (Pérez-Farfante, 1967 postlarvae acclimated from a salinity of 30‰ to higher (35‰ or lower (16, 22 and 29‰ salinities and reared for 20 days. Overall, higher final weight, yield and growth rate were observed at a salinity of 29‰. RNA:DNA ratio indicated reduced growth potential at a salinity of 35‰. Low salinities resulted in more developed individuals. Thus, early postlarval F. paulensis should not be stocked in salinities higher than that of the original hatchery, otherwise in lower salinities postlarvae should be older and/or have an extended nursery phase. Results may assist in the development of nursery rearing protocols for F. paulensis, an alternative species for aquaculture in subtropical areas.

  10. First Report of Two Diogenid Species of Hermit Crabs (Crustacea: Decapoda: Anomura from Korea

    Directory of Open Access Journals (Sweden)

    Jung, Jibom

    2015-04-01

    Full Text Available Two diogenid hermit crab species, Dardanus lagopodes and Diogenes deflectomanus, are newly reported from Korea. Dardanus lagopodes is distinguished from the other species of genus Dardanus in Korea by having setae with cream-colored tips on the cephalothorax and the following characteristics: ocular peduncles somewhat longer than antennular peduncles, and the pereopod without a longitudinal sulcus and scute-like projections. Diogenes deflectomanus is similar to D. nitidimanus but can be distinguished by having the fixed finger of the left cheliped bent slightly downwardly and the following characteristics: slightly shorter ocular peduncle, elongated left cheliped with small granules on the surface, right cheliped without calcareous teeth on the cutting edge of the dactylus, and the minute spine of post-median margin of the telson is not well developed. The geographical distributions of these two species are extended by the present study. In particular, D. deflectomanus in the current study is the first report outside Chinese waters. Now, 20 species of the family Diogenidae are known in Korean waters.

  11. 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

    in the mouthparts had concentration-dependent responses, with thresholds between 10-7 and 10-4 M and without saturation even at 10-3 or 10-2 M. They also quickly adapted when exposed to their best compounds at 10-4 and 10-3 M. A comparison of the response properties of these neurons in the mouthparts with those...... detection by the antennae, precise location and collection by the pereiopods, and detailed assessment of quality by the mouthparts....

  12. First Record of Aliaporcellana and Lissoporcellana (Crustacea: Decapoda: Porcellanidae from Korea

    Directory of Open Access Journals (Sweden)

    Lee, Sanghui

    2015-07-01

    Full Text Available Two porcelain crab species, Aliaporcellana pygmaea (De Man, 1902 and Lissoporcellana nakasonei (Miyake, 1978, are reported here for the first time from Korean waters based on specimens collected from Jeju Island, Korea. The genus Aliaporcellana Nakasone and Miyake, 1969, and Lissoporcellana Haig, 1978 are also reported here for the first time in Korea. Aliaporcellana pygmaea has a wide distribution. The specimen reported here is the most northern record of this species. While, Lissoporcellana nakasonei, associated with anthozoans, was known for distributing range from New Caledonia to southern Japan. As a result, the distribution rage of L. nakasonei is changed to Korea. Now, 12 species of porcelain crabs have been reported in Korean waters.

  13. 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.

  14. Molecular phylogenetics of American snapping shrimps allied to Alpheus floridanus Kingsley, 1878 (Crustacea: Decapoda: Alpheidae).

    Science.gov (United States)

    Bracken-Grissom, Heather D; Robles, Rafael; Felder, Darryl L

    2014-12-17

    Widely distributed populations of the snapping shrimp, Alpheus floridanus Kinglsey, 1878, from the eastern Pacific and western and eastern Atlantic Ocean have long been suspected to represent different species due to extreme morphological variation among conspecifics. A companion study (Bracken-Grissom & Felder 2014) contains redescriptions of two western Atlantic species (A. floridanus Kingsley 1878 sensu stricto and A. platycheirus Boone, 1927), assignments of the original syntypes for A. floridanus, descriptions of three new species from the Atlantic and eastern Pacific (A. hephaestus Bracken-Grissom & Felder, 2014; A. roblesi Bracken-Grissom & Felder, 2014; A. ulalae Bracken-Grissom & Felder, 2014), and discussion of the relationship of the eastern Atlantic A. floridanus africanus Balss, 1916. The present study underpins all these findings by application of molecular phylogenetic techniques. Analysis of partial sequences of the 16S, 12S, and COI mitochondrial genes separate species throughout the eastern Pacific and the eastern and western Atlantic. Morphological comparisons suggested that the two syntypes of A. floridanus belong to different species, and molecular results in this study confirm this separation. Genetic data suggest a strong affinity between the western Atlantic A. platycheirus and the eastern Pacific A. hephaestus. Close relationships are evident between trans-Atlantic species, A. floridanus africanus and A. floridanus, a pattern also seen for other cryptic and pseudocryptic species of Alpheus. Alpheus roblesi and A. ulalae represent early-branching lineages within the complex. In some cases, molecular phylogenetic relationships between members of the A. floridanus complex can be reconciled with postulated biogeographic history.

  15. 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 gently touches the food with a frequency of 3-5 Hz. The medial rim of the basis of maxilla 2 carries three types of seta. Type 1 is serrate, type 2 and 3 are serrulate, and type 2 has a prominent terminal pore. Type 2 is innervated by 18-25 sensory cells whose cilia protrude through the terminal pore...... and are in direct contact with the external environment. The structure of type 2 setae indicates that they are mainly gustatory, although still bimodal due to their innervation by presumed chemosensory and mechanosensory neurons. Distally, the three types of setae have a complex arrangement of the cuticle involving...

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

    OpenAIRE

    Re-Araujo, Ana Denisse; Acosta Ruiz, M. de Jesús

    2014-01-01

    The 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 sh...

  17. 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

    Luciferidae is a family of peculiar and widely distributed shrimps with an unclear systematic position and uncertain internal phylogeny. We undertook a phylogenetic analysis of Luciferidae based on 169 morphological characters (147 binary, 22 multistate). Several characters were based on scanning...

  18. Dead shrimp blues: a global assessment of extinction risk in freshwater shrimps (Crustacea: Decapoda: Caridea).

    Science.gov (United States)

    De Grave, Sammy; Smith, Kevin G; Adeler, Nils A; Allen, Dave J; Alvarez, Fernando; Anker, Arthur; Cai, Yixiong; Carrizo, Savrina F; Klotz, Werner; Mantelatto, Fernando L; Page, Timothy J; Shy, Jhy-Yun; Villalobos, José Luis; Wowor, Daisy

    2015-01-01

    We present the first global assessment of extinction risk for a major group of freshwater invertebrates, caridean shrimps. The risk of extinction for all 763 species was assessed using the IUCN Red List criteria that include geographic ranges, habitats, ecology and past and present threats. The Indo-Malayan region holds over half of global species diversity, with a peak in Indo-China and southern China. Shrimps primarily inhabit flowing water; however, a significant subterranean component is present, which is more threatened than the surface fauna. Two species are extinct with a further 10 possibly extinct, and almost one third of species are either threatened or Near Threatened (NT). Threats to freshwater shrimps include agricultural and urban pollution impact over two-thirds of threatened and NT species. Invasive species and climate change have the greatest overall impact of all threats (based on combined timing, scope and severity of threats).

  19. The complete mitogenome of the New Zealand freshwater crayfish Paranephrops planifrons White 1842 (Crustacea: Decapoda: Parastacidae).

    Science.gov (United States)

    Lee, Yin Peng; Gan, Han Ming; Tan, Mun Hua; Lys, Isabelle; Page, Rachel; Dias Wanigasekera, Beatrice; Austin, Christopher M

    2016-09-01

    The mitogenome of Paranephrops planifrons, was obtained by next generation sequencing. This crayfish has a mitochondrial genome of 16,174 base pairs with 13 protein-coding genes, 2 ribosomal subunit genes, 22 transfer RNAs (tRNA), and a non-coding AT-rich region of 771 bp. The P. planifrons nucleotide composition is: 33.63% for T, 21.92% for C, 34.46% for A, and 9.98% for G and has a 68.09% AT bias. While the mitogenome gene order for this species is consistent with aspects of the highly distinctive parastacid crayfish mitogenome gene arrangement, it has a novel gene order involving the rearrangements of a protein coding and several tRNA genes.

  20. Desenvolvimento juvenil de Hepatus pudibundus (Herbst (Crustacea, Decapoda, Calappidae, em laboratório

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    Hebling Nilton José

    2003-01-01

    Full Text Available The Hepatus pudibundus (Herbst, 1785 juvenile development was studied in laboratory, under the morphological and systematical stand points. The eight early juvenile stages were obtained from larvae hatched from eggs of two ovigerous females, collected at the northern coast of the State of São Paulo, Brazil. The experiments were carried out in a climatically controlled room at 25 ± 1°C, and steady saltness of 34?. The youngs were maintened individually and food consisted of Artemia sp. nauplii and fragments of fish muscle.The first juvenile stage were particulary drawn and described. For the remaining juvenile stages the most representative frameworks were picked out, which allowed the characterization of the first eight stages. According to juvenile morphology studies, it was noted that secondary sexual characters differentation begins from the third stage.

  1. Carideorum catalogus: the recent species of the dendrobranchiate, stenopodidean, procarididean and caridean shrimps (Crustacea: Decapoda)

    NARCIS (Netherlands)

    De Grave, S.; Fransen, C.H.J.M.

    2011-01-01

    A checklist of recent species of dendrobranchiate, stenopodidean, procarididean and caridean shrimps including synonyms and type localities. Also listed are unavailable names, larval names, nomina dubia and nomina nuda. A complete list of references to original descriptions of taxa listed is provide

  2. Preliminary observations on the mandibles of palaemonoid shrimp (Crustacea: Decapoda: Caridea: Palaemonoidea

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    Christopher W. Ashelby

    2015-03-01

    Full Text Available The mandibles of caridean shrimps have been widely studied in the taxonomy and functional biology of the group. Within the Palaemonoidea the mandibles reach a high level of structural diversity reflecting the diverse lifestyles within the superfamily. However, the majority of studies have been restricted to light microscopy, with the ultrastructure at finer levels poorly known. This study investigates the mandible of nine species belonging to six of the recognised families of the Palaemonoidea using SEM and analyses the results in a phylogenetic and dietary framework. The results of the study indicate that little phylogenetic information is conveyed by the structure of the mandible, but that its form is influenced by primary food sources of each species. With the exception of Anchistioides antiguensis, all species examined possessed cuticular structures at the distal end of the pars molaris (molar process. Five types of cuticular structures are recognised herein, each with a unique form, but variable in number, placement and arrangement. Each type is presumed to have a different function which is likewise related to diet.

  3. The complete mitogenome of the moon crab Ashtoret lunaris (Forskal, 1775), (Crustacea; Decapoda; Matutidae).

    Science.gov (United States)

    Tan, Mun Hua; Gan, Han Ming; Lee, Yin Peng; Austin, Christopher M

    2016-01-01

    The complete mitochondrial genome of the moon crab Ashtoret lunaris was obtained from a partial genome scan using the MiSeq sequencing system. The Ashtoret lunaris mitogenome is 15,807 base pairs in length (70% A + T content) and made up of 13 protein-coding genes, 2 ribosomal subunit genes, 22 transfer RNAs, and a putative 956 bp non-coding AT-rich region. This A. lunaris mitogenome sequence is the first for the genus, as well as the family Matutidae and superfamily Calappoidea.

  4. A New Report of Two Species of Pagurid Hermit Crabs (Crustacea: Decapoda: Anomura from Korea

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    Won Kim

    2014-01-01

    Full Text Available Pagurus undosus and Pagurus parvispina, collected from the East Sea by fishery trap, are newly recorded from Korean waters. Pagurus undosus is distinguished from other hermit crab by its right cheliped slightly elevated medially, and with broad ridge formed by deep depressions mesial and lateral to midline. Pagurus parvispina is distinguished from other hermit crab by its right cheliped covered with large spine and long tufts of setae. These species live in cold water areas and their geographical distribution is extended southwardly by the present study. A specimen of the former species, P. undosus, was found living in a shelter formed by a sponge, similar to that observed in Pagurus pectinatus. Descriptions and figures of these two species are provided in this paper. Currently, 27 species of the genus Pagurus are recorded in Korean fauna.

  5. 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 Isr

  6. Effects of temperature on cellular and biochemical parameters in the crab Carcinus aestuarii (Crustacea, Decapoda).

    Science.gov (United States)

    Matozzo, Valerio; Gallo, Chiara; Marin, Maria Gabriella

    2011-06-01

    The effects of temperature on cellular and biochemical parameters of the crab Carcinus aestuarii were evaluated. Crabs were kept for 7 days at 4, 17 (reference value) and 30 °C (salinity of 35 psu), and total haemocyte count (THC), haemocyte volume, haemocyte proliferation, phenoloxidase (PO) activity in both haemocyte lysate (HL) and cell-free haemolymph (CFH), CFH total protein and glucose levels, superoxide dismutase (SOD) and catalase (CAT) activities in both gills and digestive gland were evaluated. The lowest and the highest temperature significantly decreased THC, whereas haemocyte volume and haemolymph glucose concentration did not differ significantly among experimental conditions. Haemolymph protein concentration significantly reduced in crabs maintained at 30 °C, when compared with that of animals kept at 4 and 17 °C. Haemocyte proliferation increased significantly in crabs kept at 4 and 30 °C, when compared with that of crabs held at 17 °C. Likewise, a significantly higher PO activity was recorded in CFH from crabs kept at 4 and 30 °C, than in control crabs. Conversely, PO activity did not vary significantly in HL. With regard to antioxidant enzyme activities, a significant decrease in CAT activity was observed in gills from crabs kept at 4 °C, when compared to that of crabs kept at 17 °C and 30 °C. Results obtained demonstrated that the highest and lowest temperature tested influenced crab biological responses, and indicated that C. aestuarii modulated its cellular and biochemical parameters (mainly haemocyte proliferation, CFH protein concentrations and CFH PO activity) in order to cope with temperature. Copyright © 2011 Elsevier Ltd. All rights reserved.

  7. Effects Of Temperature On Cellular And Biochemical Parameters In The Crab Carcinus Aestuarii (Crustacea, Decapoda)

    OpenAIRE

    Matozzo, Valerio; Gallo, Chiara; Marin, Maria Gabriella

    2011-01-01

    Abstract The effects of temperature on cellular and biochemical parameters of the crab Carcinus aestuarii were evaluated. Crabs were kept for 7 days at 4, 17 (reference value) and 30 ?C (salinity of 35 psu), and total haemocyte count (THC), haemocyte volume, haemocyte proliferation, phenoloxidase (PO) activity in both haemocyte lysate (HL) and cell-free haemolymph (CFH), CFH total protein and glucose levels, superoxide dismutase (SOD) and catalase (CAT) activities in both gills and...

  8. Nutritional status of Carcinus maenas (Crustacea: Decapoda) influences susceptibility to contaminant exposure.

    Science.gov (United States)

    Dissanayake, Awantha; Galloway, Tamara S; Jones, Malcolm B

    2008-08-11

    Using the shore crab Carcinus maenas as a model, this study tested the hypothesis that nutritional status influences susceptibility of adult crabs (>60mm carapace width (CW)) to environmental contamination. In the laboratory, crabs were either starved, given a restricted diet (fed on alternate days) or fully fed (fed each day). In addition, crabs under each feeding regime were exposed to a sublethal concentration (200microgl(-1)) of pyrene (PYR) as a model organic (PAH (polyaromatic hydrocarbon)) contaminant. Various physiological end points were measured after 7 and 14 days. Results indicated that adult shore crab physiology was relatively robust to short-term (7 days) nutritional changes as multivariate analysis (ANOSIM) showed no significant difference in shore crab physiological condition between control and pyrene-exposed crabs, irrespective of dietary feeding regime [Global R=0.018, P (%)=19.2]. After 14 days, however, starved crabs showed significant impacts to physiological condition (as revealed by multivariate analysis) [Global R=0.134, P (%)=0.1], [R=0.209, P (%)=0.1]; starved individuals had significantly lower antioxidant status (F(2,48)=5.35, Pcontrol individuals (Pcontrols (Pcontrol crabs; however, after 14 days, antioxidant status (Pbiological-effects tools in environmental monitoring.

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

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    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.

  10. On Parathelphusa ceophallus spec. nov. (Crustacea: Decapoda: Brachyura: Parathelphiisidae) from Pulau Buton, Sulawesi

    NARCIS (Netherlands)

    Ng, P.K.L.

    1993-01-01

    A new species of parathelphusid freshwater crab, Parathelphusa ceophallus, is described from Pulau Buton, a small island southeast of the island of Sulawesi in Indonesia. The species is differentiated from its allies in the P. celebensis complex by the form of its anterolateral margin, postorbital c

  11. On the larval genus Problemacaris Stebbing, and its probable identity (Crustacea, Decapoda)

    NARCIS (Netherlands)

    Gordon, I.

    1964-01-01

    INTRODUCTION After the manuscript of my paper on Problemacaris (Gordon, 1960), had gone to press, Dr. R. B. Pike sent me notes and drawings of a larva that had been obtained by the "Sarsia" on 14 November 1957 and which he and Dr. D. I. Williamson had examined. When I told these two zoologists that

  12. Multiple host switching events shape the evolution of symbiotic palaemonid shrimps (Crustacea: Decapoda).

    Science.gov (United States)

    Horká, Ivona; De Grave, Sammy; Fransen, Charles H J M; Petrusek, Adam; Ďuriš, Zdeněk

    2016-06-01

    The majority of the almost 1,000 species of Palaemonidae, the most speciose family of caridean shrimp, largely live in symbioses with marine invertebrates of different phyla. These associations range from weak epibiosis to obligatory endosymbiosis and from restricted commensalism to semi-parasitism, with the specialisation to particular hosts likely playing a role in the diversification of this shrimp group. Our study elucidates the evolutionary history of symbiotic palaemonids based on a phylogenetic analysis of 87 species belonging to 43 genera from the Indo-West Pacific and the Atlantic using two nuclear and two mitochondrial markers. A complementary three-marker analysis including taxa from GenBank raises this number to 107 species from 48 genera. Seven larger clades were recovered in the molecular phylogeny; the basal-most one includes mostly free-living shrimp, albeit with a few symbiotic species. Ancestral state reconstruction revealed that free-living forms likely colonised cnidarian hosts initially, and switching between different host phyla occurred multiple times in palaemonid evolutionary history. In some cases this was likely facilitated by the availability of analogous microhabitats in unrelated but morphologically similar host groups. Host switching and adaptations to newly colonised host groups must have played an important role in the evolution of this diverse shrimp group.

  13. Uroptychodes, new genus of Chirostylidae (Crustacea: Decapoda: Anomura, with description of three new species

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    Keiji Baba

    2004-03-01

    Full Text Available Examination of materials collected from Indonesia, New Caledonia and vicinity, now deposited in the Muséum National d´Histoire Naturelle, disclosed three additional undescribed species of chirostylids belonging to the Uroptychus spinimarginatus group. The group is now shifted to a distinct genus Uroptychodes. Uroptychus grandirostris Yokoya, 1933, which can be transferred to Uroptychodes, has been a problematic species because of the brevity of the original description and the loss of the type material. However, a recent finding of a specimen, which is in poor condition, very much like the illustration of U. grandirostris by Yokoya (1933: Fig. 29, but different from the description of U. grandirostris given by van Dam (1939 for one of the type specimens, suggests that the type material of U. grandirostris includes at least two species. In this paper a neotype is selected for U. grandirostris. The genus Uroptychodes now contains 10 species. All these species are reviewed and a key to the species of the genus is provided.

  14. [Nutrition of juvenile prawn Macrobrachium carcinus (Crustacea: Decapoda) with diets of vegetable and marine residues].

    Science.gov (United States)

    Casas-Sánchez, R; Vaillard-Nava, Y; Re-Araujo, A D

    1995-01-01

    Juvenile prawn Macrobrachium carcinus were fed two different diets: restaurant by-products (diet I) and fish and vegetable market by-products (diet II). These diets were evaluated by proximal analysis, assimilation efficiency and the factor conversion rate (FCR). Diet I registered a higher efficiency, but there was no difference in the growth rate. The growth mean (G. L.) for three months was 0.254 +/- 0.13 cm (diet I) and 0.191 +/- 0.1 cm (diet II). The conversion rate was good for both, suggesting that 6 to 7 kg of food are needed to obtain 1 kg of prawn. Survival was 76% and 100% for diets I and II, respectively.

  15. A new snapping shrimp (Crustacea Decapoda, Alpheidae, Alpheus) from the estuarine mudflats of Kuwait

    NARCIS (Netherlands)

    Anker, A.; Grave, De S.

    2009-01-01

    A new snapping shrimp, Alpheus lutosus spec. nov., is described from the intertidal mudflats of Bubiyan Island, northern Kuwait, south of the vast Shatt-Al-Arab delta. The new species appears to be closely related to Alpheus hoplocheles Coutière, 1897 from similar estuarine habitats in China and Jap

  16. 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

  17. On the taxonomy and distribution of Callinectes Stimpson (Crustacea, Decapoda, Portunidae in Rio Grande do Norte

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    C. Sankarankutty

    1991-01-01

    Full Text Available A faunistic survey of the species of Callinectes Stimpson, 1871 carried out in the coastal and estuarine regions of the State of Rio Grande do Norte yielded five species: C. bocourti A. Milne Edwards, 1879; C. danae Smith, 1869; C. exasperatus (Gerstaecker, 1856; C. larvatus Ordway, 1863 and C. ornatus Ordway, 1863. Specimens examined consist of those collected on a monthly basis from three fixed stations within the estuary of Potengi, Natal during a period of two years and those obtained from other localities. Among the species occuring in the region, C. danae is more abundant and has a wider range of tolerance of salinity while C. larvatus is restricted to the marine habitat. Though C. danae sustains important artisan fishery, C. bocourti of large size also contribute to the fishery.

  18. Description of laboratory reared first zoea of Callinectes danae Smith (Crustacea, Decapoda, Portunidae

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    Cheruparambil Sankarankutty

    1999-01-01

    Full Text Available A detailed description of laboratory reared first zoea larva of Callinectes danae Smith, 1869 is given. The larvae utilized for this study were reared in vitro in a special incubator. A comparison with larvae of other species is also attempted.

  19. Juvenile development of Callinectes danae Smith, 1869 (Crustacea, Decapoda, Brachyura, Portunidae) under laboratory conditions.

    Science.gov (United States)

    Bolla, Eduardo A; Fransozo, Vivian; Negreiros-Fransozo, Maria Lucia

    2014-03-01

    The juvenile development of Callinectes danae was investigated from megalopae obtained in neuston samples at Ubatuba, São Paulo, Brazil. The individuals were raised in the laboratory under constant temperature (25 ± 1°C), filtered sea water from the collection location (35‰), and natural photoperiod. Newly hatched Artemia sp. nauplii were offered as food on a daily basis and ornamental-fish food was also provided for the juveniles from the 4th stage on. Twelve stages of the juvenile phase were obtained. The main morphological features that allowed recognition of the first juvenile stage were drawn and described. All the subsequent stages obtained were examined and measured, and the main changes in relation to the first stage were recorded. Sexual dimorphism becomes apparent from the fourth juvenile stage onwards. Some appendages and morphological features proved to be of great importance in the identification of species, including the number of segments of the antennal flagellum and the number of setae on the maxilla and on the 1st, 2nd and 3rd maxillipeds. These can probably be used for future comparisons and species identifications.

  20. Juvenile development of Callinectes danae Smith, 1869 (Crustacea, Decapoda, Brachyura, Portunidae under laboratory conditions

    Directory of Open Access Journals (Sweden)

    EDUARDO A. BOLLA Jr

    2014-03-01

    Full Text Available The juvenile development of Callinectes danae was investigated from megalopae obtained in neuston samples at Ubatuba, São Paulo, Brazil. The individuals were raised in the laboratory under constant temperature (25 ± 1°C, filtered sea water from the collection location (35‰, and natural photoperiod. Newly hatched Artemia sp. nauplii were offered as food on a daily basis and ornamental-fish food was also provided for the juveniles from the 4th stage on. Twelve stages of the juvenile phase were obtained. The main morphological features that allowed recognition of the first juvenile stage were drawn and described. All the subsequent stages obtained were examined and measured, and the main changes in relation to the first stage were recorded. Sexual dimorphism becomes apparent from the fourth juvenile stage onwards. Some appendages and morphological features proved to be of great importance in the identification of species, including the number of segments of the antennal flagellum and the number of setae on the maxilla and on the 1st, 2nd and 3rd maxillipeds. These can probably be used for future comparisons and species identifications.

  1. 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

  2. Effects of late-cenozoic glaciation on habitat availability in Antarctic benthic shrimps (Crustacea: Decapoda: Caridea.

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    Johannes Dambach

    Full Text Available Marine invertebrates inhabiting the high Antarctic continental shelves are challenged by disturbance of the seafloor by grounded ice, low but stable water temperatures and variable food availability in response to seasonal sea-ice cover. Though a high diversity of life has successfully adapted to such conditions, it is generally agreed that during the Last Glacial Maximum (LGM the large-scale cover of the Southern Ocean by multi-annual sea ice and the advance of the continental ice sheets across the shelf faced life with conditions, exceeding those seen today by an order of magnitude. Conditions prevailing at the LGM may have therefore acted as a bottleneck event to both the ecology as well as genetic diversity of today's fauna. Here, we use for the first time specific Species Distribution Models (SDMs for marine arthropods of the Southern Ocean to assess effects of habitat contraction during the LGM on the three most common benthic caridean shrimp species that exhibit a strong depth zonation on the Antarctic continental shelf. While the shallow-water species Chorismus antarcticus and Notocrangon antarcticus were limited to a drastically reduced habitat during the LGM, the deep-water shrimp Nematocarcinus lanceopes found refuge in the Southern Ocean deep sea. The modeling results are in accordance with genetic diversity patterns available for C. antarcticus and N. lanceopes and support the hypothesis that habitat contraction at the LGM resulted in a loss of genetic diversity in shallow water benthos.

  3. Sensitivity of the freshwater prawn, Macrobrachium lanchesteri (Crustacea: Decapoda), to heavy metals.

    Science.gov (United States)

    Shuhaimi-Othman, Mohammad; Yakub, Nadzifah; Ramle, Nur-Amalina; Abas, Ahmad

    2011-07-01

    Adult Macrobrachium lanchesteri were exposed for a 4-day period in laboratory conditions to a range of copper (Cu), cadmium (Cd), zinc (Zn) and lead (Pb) concentrations. Mortality was assessed and median lethal times (LT₅₀) and concentrations (LC₅₀) were calculated. At the end of the 4-day period, live prawns were used to determine bioconcentration of the metals. LT₅₀ and LC₅₀ increased with the decrease in mean exposure concentrations and times, respectively, for all metals. LC₅₀s for 96 hours for Cu, Cd, Zn and Pb were 32.3, 7.0, 525.1 and 35.0 µg/L, respectively. Cu, Cd, Zn and Pb bioconcentration in M. lanchesteri increases with exposure to increasing concentrations and Cd was the most toxic to M. lanchesteri, followed by Pb, Cu and Zn. Comparison of LC₅₀ values for metals for this species with those for other freshwater crustacean organisms reveals that M. lanchesteri is equally or more sensitive to heavy metals than most other tested crustaceans.

  4. Alpheus rudolphi spec. nov., a new snapping shrimp from northeastern Brazil (Crustacea: Decapoda: Alpheidae)

    NARCIS (Netherlands)

    Almeida, A.O.; Anker, A.

    2011-01-01

    A new snapping shrimp of the Alpheus armatus Rathbun, 1901 species complex, Alpheus rudolphi spec. nov., is described based on a single female holotype collected off Alagoas, northeastern Brazil (09°55.11’S 35°32.73’W). The new species differs from all other species of the A. armatus complex by the

  5. 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

  6. Leucosiid crabs from Papua New Guinea, with descriptions of eight new species (Crustacea: Decapoda: Brachyura).

    Science.gov (United States)

    Galil, Bella S; Ng, Peter K L

    2015-10-06

    Twenty-five species of leucosiid crabs are reported from Madang Province, Papua New Guinea. Of these, seven are new to science: two each are included in Alox Tan & Ng, 1995 and Tanaoa Galil, 2003, and one each in Ryphila Galil, 2009, Seulocia Galil, 2005, and Urnalana Galil, 2005. Fifteen additional species are new records for Papua New Guinea: Alox rugosum (Stimpson, 1858), Ancylodactyla nana (Zarenkov, 1990), Arcania heptacantha De Man, 1907, Heterolithadia fallax (Henderson, 1893), Hiplyra longimana (A. Milne Edwards, 1874), Myra curtimana Galil, 2001, M. digitata Galil 2004, Nursilia dentata Bell, 1855, Oreotlos etor Tan & Richer de Forges, 1993, Parilia major Sakai, 1961, Raylilia coniculifera Galil, 2001, R. uenoi (Takeda, 1995), Toru pilus (Tan, 1996), Urashima pustuloides (Sakai, 1961) and Leucosia rubripalma Galil, 2003. The new species are described and illustrated, and their affinities with allied taxa discussed. Colour photographs are provided for 20 species.

  7. Phylomitogenomics of Malacostraca (Arthropoda:Crustacea)

    Institute of Scientific and Technical Information of China (English)

    SHEN Xin; TIAN Mei; YAN Binlun; CHU Kahou

    2015-01-01

    Along with the sequencing technology development and continual enthusiasm of researchers on the mitochondrial genomes, the number of metazoan mitochondrial genomes reported has a tremendous growth in the past decades. Phylomitogenomics—reconstruction of phylogenetic relationships based on mitochondrial genomic data—is now possible across large animal groups. Crustaceans in the class Malacostraca display a high diversity of body forms and include large number of ecologically and commercially important species. In this study, comprehensive and systematic analyses of the phylogenetic relationships within Malacostraca were conducted based on 86 mitochondrial genomes available from GenBank. Among 86 malacostracan mitochondrial genomes, 54 species have identical major gene arrangement (excluding tRNAs) to pancrustacean ground pattern, including six species from Stomatopoda, three species from Amphipoda, two krill, seven species from Dendrobranchiata (Decapoda), and 36 species from Pleocyemata (Decapoda). However, the other 32 mitochondrial genomes reported exhibit major gene rearrangements. Phylogenies based on Bayesian analyses of nucleotide sequences of the protein-coding genes produced a robust tree with 100%posterior probability at almost all nodes. The results indicate that Amphipoda and Isopoda cluster together (Edriophthalma) (BPP=100). Phylomitogenomic analyses strong support that Euphausiacea is nested within Decapoda, and closely related to Dendrobranchiata, which is also consistent with the evidence from developmental biology. Yet the taxonomic sampling of mitochondrial genome from Malacostraca is very biased to the order Decapoda, with no complete mitochondrial genomes reported from 11 of the 16 orders. Future researches on sequencing the mitochondrial genomes from a wide variety of malacostracans are necessary to further elucidate the phylogeny of this important group of animals. With the increase in mitochondrial genomes available, phylomitogenomics

  8. 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

  9. Results of the global conservation assessment of the freshwater crabs (Brachyura, Pseudothelphusidae and Trichodactylidae): The Neotropical region, with an update on diversity

    Science.gov (United States)

    Cumberlidge, Neil; Alvarez, Fernando; Villalobos, Jose-Luis

    2014-01-01

    Abstract The freshwater crabs of the Neotropics comprise 311 species in two families (Pseudothelphusidae and Trichodactylidae) and one or both of these families are found in all of the countries in the Neotropical region (except for Chile and some of the Caribbean islands). Colombia (102 species, 81% endemic) and Mexico (67 species, 95% endemic) are the biodiversity hotspots of freshwater crab species richness and country-level endemism for this region. The results of the IUCN Red List conservation assessments show that 34% of pseudothelphusids and 10% of trichodactylids have an elevated risk of extinction, 29% of pseudothelphusids and 75% of trichodactylids are not at-risk (Least Concern), and although none are actually extinct, 56% of pseudothelphusids and 17% of trichodactylids are too poorly known to assess (Data Deficient). Colombia (14 species), Venezuela (7 species), Mexico (6 species), and Ecuador (5 species) are the countries with the highest number of threatened species of Neotropical freshwater crabs. The majority of threatened species are restricted-range semiterrestrial endemics living in habitats subjected to deforestation, alteration of drainage patterns, and pollution. This underlines the need to prioritize and develop conservation measures before species decline to levels from which they cannot recover. These results represent a baseline that can be used to design strategies to save threatened Neotropical species of freshwater crabs. PMID:25561834

  10. Results of the global conservation assessment of the freshwater crabs (Brachyura, Pseudothelphusidae and Trichodactylidae: The Neotropical region, with an update on diversity

    Directory of Open Access Journals (Sweden)

    Neil Cumberlidge

    2014-11-01

    Full Text Available The freshwater crabs of the Neotropics comprise 311 species in two families (Pseudothelphusidae and Trichodactylidae and one or both of these families are found in all of the countries in the Neotropical region (except for Chile and some of the Caribbean islands. Colombia (102 species, 81% endemic and Mexico (67 species, 95% endemic are the biodiversity hotspots of freshwater crab species richness and country-level endemism for this region. The results of the IUCN Red List conservation assessments show that 34% of pseudothelphusids and 10% of trichodactylids have an elevated risk of extinction, 29% of pseudothelphusids and 75% of trichodactylids are not at-risk (Least Concern, and although none are actually extinct, 56% of pseudothelphusids and 17% of trichodactylids are too poorly known to assess (Data Deficient. Colombia (14 species, Venezuela (7 species, Mexico (6 species, and Ecuador (5 species are the countries with the highest number of threatened species of Neotropical freshwater crabs. The majority of threatened species are restricted-range semiterrestrial endemics living in habitats subjected to deforestation, alteration of drainage patterns, and pollution. This underlines the need to prioritize and develop conservation measures before species decline to levels from which they cannot recover. These results represent a baseline that can be used to design strategies to save threatened Neotropical species of freshwater crabs.

  11. Results of the global conservation assessment of the freshwater crabs (Brachyura, Pseudothelphusidae and Trichodactylidae): The Neotropical region, with an update on diversity.

    Science.gov (United States)

    Cumberlidge, Neil; Alvarez, Fernando; Villalobos, Jose-Luis

    2014-01-01

    The freshwater crabs of the Neotropics comprise 311 species in two families (Pseudothelphusidae and Trichodactylidae) and one or both of these families are found in all of the countries in the Neotropical region (except for Chile and some of the Caribbean islands). Colombia (102 species, 81% endemic) and Mexico (67 species, 95% endemic) are the biodiversity hotspots of freshwater crab species richness and country-level endemism for this region. The results of the IUCN Red List conservation assessments show that 34% of pseudothelphusids and 10% of trichodactylids have an elevated risk of extinction, 29% of pseudothelphusids and 75% of trichodactylids are not at-risk (Least Concern), and although none are actually extinct, 56% of pseudothelphusids and 17% of trichodactylids are too poorly known to assess (Data Deficient). Colombia (14 species), Venezuela (7 species), Mexico (6 species), and Ecuador (5 species) are the countries with the highest number of threatened species of Neotropical freshwater crabs. The majority of threatened species are restricted-range semiterrestrial endemics living in habitats subjected to deforestation, alteration of drainage patterns, and pollution. This underlines the need to prioritize and develop conservation measures before species decline to levels from which they cannot recover. These results represent a baseline that can be used to design strategies to save threatened Neotropical species of freshwater crabs.

  12. Phylogenetic systematics of the Eucarida (Crustacea malacostraca

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    Martin L. Christoffersen

    1988-01-01

    Full Text Available Ninety-four morphological characters belonging to particular ontogenetic sequences within the Eucarida were used to produce a hierarchy of 128 evolutionary novelties (73 synapomorphies and 55 homoplasies and to delimit 15 monophyletic taxa. The following combined Recent-fossil sequenced phylogenetic classification is proposed: Superorder Eucarida; Order Euphausiacea; Family Bentheuphausiidae; Family Euphausiidae; Order Amphionidacea; Order Decapoda; Suborder Penaeidea; Suborder Pleocyemata; Infraorder Stenopodidea; Infraorder Reptantia; Infraorder Procarididea, Infraorder Caridea. The position of the Amphionidacea as the sister-group of the Decapoda is corroborated, while the Reptantia are proposed to be the sister-group of the Procarididea + Caridea for the first time. The fossil groups Uncina Quenstedt, 1850, and Palaeopalaemon Whitfield, 1880, are included as incertae sedis taxa within the Reptantia, which establishes the minimum ages of all the higher taxa of Eucarida except the Procarididea and Caridea in the Upper Devonian. The fossil group "Pygocephalomorpha" Beurlen, 1930, of uncertain status as a monophyletic taxon, is provisionally considered to belong to the "stem-group" of the Reptantia. Among the more important characters hypothesized to have evolved in the stem-lineage of each eucaridan monophyletic taxon are: (1 in Eucarida, attachement of post-zoeal carapace to all thoracic somites; (2 in Euphausiacea, reduction of endopod of eighth thoracopod; (3 in Bentheuphausiidae, compound eyes vestigial, associated with abyssal life; (4 in Euphausiidae, loss of endopod of eighth thoracopod and development of specialized luminescent organs; (5 in Amphionidacea + Decapoda, ambulatory ability of thoracic exopods reduced, scaphognathite, one pair of maxillipedes, pleurobranch gill series and carapace covering gills, associated with loss of pelagic life; (6 in Amphionidacea, unique thoracic brood pouch in females formed by inflated carapace and

  13. Dieta del cangrejo dulceacuícola Bottiella niceforei (Schmitt & Pretzmann, 1968 (Decapoda: Trichodactylidae y su relación con el procesamiento de la materia orgánica en una corriente intermitente del noroeste de Venezuela

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    Raúl Pirela

    2013-09-01

    Full Text Available Para aproximarse al rol que tiene el cangrejo de río Bottiella niceforei en el procesamiento de materia orgánica, en una corriente intermitente al noroeste de Venezuela, se estudió su dieta natural, mediante el análisis del contenido del tracto digestivo entre junio 2009 y febrero 2010. Se determinó la abundancia de los cangrejos sobre la base de la proporción de individuos capturados por trampas, a lo largo del muestreo, y en cada pozo. Las mayores densidades ocurrieron en septiembre (2,7 ind trampa-1, seguido de junio (2,3 ind trampa-1 y julio (2,1 ind trampa-1, mientras que las menores se obtuvieron de noviembre a febrero, posiblemente debido al efecto erosivo de la corriente durante la época de lluvia. No se encontraron diferencias significativas en la abundancia y dieta entre pozos. De junio a noviembre, se encontró que el ítem más abundante en la dieta fue el detrito vegetal, con una frecuencia de ocurrencia promedio de 68%; en segundo lugar, materia animal (restos de peces con 50% y detrito vegetal amorfo con 14%. Estos resultados demuestran la importancia de la participación del cangrejo B. niceforei en el procesamiento de la materia orgánica en forma de hojarasca en los pozos de caño Carichuano.

  14. Naamlijst van de Nederlandse landpissebedden (Crustacea: Isopoda: Oniscidea)

    NARCIS (Netherlands)

    Berg, M.P.

    1997-01-01

    Checklist of Dutch woodlice (Crustacea: Isopoda: Oniscidea). An updated checklist for the terrestrial isopods of The Netherlands is presented. Four species, Armadillo officinalis, Eluma purpurascens, Miktoniscus patiencei, and Trichoniscoides sarsi are new to the woodlice fauna of The Netherlands co

  15. 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

  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 descrip

  17. 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

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    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.

  18. Aspectos reprodutivos de Palaemon pandaliformis (Stimpson) (Crustacea, Decapoda, Palaemonidae) no Rio Sahy, Mangaratiba, Rio de Janeiro, Brasil The reproductive aspects of the freshwater shrimp Palaemon pandaliformis (Stimpson) (Crustacea, Decapoda, Palaemonidae) from Sahy River, Mangaratiba, Rio de Janeiro, Brazil

    OpenAIRE

    Giovana Valverde Lima; Lídia Miyako Yoshii Oshiro

    2002-01-01

    The reproductive aspects of the freshwater shrimp Palaemon pandaliformis (Stimpson, 1871) were studied from March, 1998 to February, 1999. Monthly, samples were collected with sives, on the river edge, under the edging vegetation or in small pools. At the laboratory, shrimps were sexed and measured in their total lenght, from the tip of the rostrum to the of telson with precision callipters. The ovigerous shrimps were separated and counted for fecundity determination. The eggs diameter was me...

  19. Aspectos reprodutivos de Potimirim glabra (Kingsley (Crustacea, Decapoda, Atyidae no Rio Sahy, Mangaratiba, Rio de Janeiro, Brasil The reproductive aspects of the freshwater shrimp Potimirim glabra (Kingsley (Crustacea, Decapoda, Atyidae from Sahy River, Mangaratiba, Rio de Janeiro, Brazil

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    Giovana Valverde Lima

    2002-09-01

    Full Text Available The reproductive aspects of the freshwater shrimp Potimirim glabra (Kingsley, 1878 were studied from September 1997 to February 1999. Monthly, samples were collected with sieves, on the river edge, under the edging vegetation or in small pools. At the laboratory, shrimps were sexed and measured in their total lenght, from the tip of the rostrum to the end of telson with precision callipers. The ovigerous shrimps were separated and counted for fecundity determination. The eggs diameter was measured with calibrated stereomicroscope. A total of 3281 shrimps were collected, among which, 47% male, 46% female (13.4% ovigerous females and 7% young shrimps. The Sex ratio was 1:1. Ovigerous females were present during all seasons, but the reproductive peak occurred in spring. The ovigerous female showed total lenght from 9.5 to 26.0 mm and carapace lenght from 1.6 to 7.3 mm. The mean fecundity was 545 eggs per female, with a minimun of 223 eggs and a maximum of 860 eggs. The first sexual maturation probably occur at 9.5 mm total lenght. The mean diameter of the eggs size was 0.32 mm (minor and 0.53 mm (major.

  20. Aspectos reprodutivos de Palaemon pandaliformis (Stimpson (Crustacea, Decapoda, Palaemonidae no Rio Sahy, Mangaratiba, Rio de Janeiro, Brasil The reproductive aspects of the freshwater shrimp Palaemon pandaliformis (Stimpson (Crustacea, Decapoda, Palaemonidae from Sahy River, Mangaratiba, Rio de Janeiro, Brazil

    Directory of Open Access Journals (Sweden)

    Giovana Valverde Lima

    2002-09-01

    Full Text Available The reproductive aspects of the freshwater shrimp Palaemon pandaliformis (Stimpson, 1871 were studied from March, 1998 to February, 1999. Monthly, samples were collected with sives, on the river edge, under the edging vegetation or in small pools. At the laboratory, shrimps were sexed and measured in their total lenght, from the tip of the rostrum to the of telson with precision callipters. The ovigerous shrimps were separated and counted for fecundity determination. The eggs diameter was measured with calibrated stereomicroscope. A total of 872 were collected among which, 46% female, 29% male and 25% juvenil. The sex ratio was 1:1.57. Ovigerous females were present during all seasons, but the reproductive peak accurred in Spring. The ovigerous female showed total lenght from 23.0 to 39.6 mm. The mean fecundity was 137 eggs per female, with a minimum of 40 eggs and a maximum of 270 eggs. The first sexual maturation probably occur at 23.0 mm total lenght. The mean diameter os the eggs size was 0.51 mm (minor and 0.73 mm (major.

  1. Aspectos reprodutivos de Potimirim glabra (Kingsley) (Crustacea, Decapoda, Atyidae) no Rio Sahy, Mangaratiba, Rio de Janeiro, Brasil The reproductive aspects of the freshwater shrimp Potimirim glabra (Kingsley) (Crustacea, Decapoda, Atyidae) from Sahy River, Mangaratiba, Rio de Janeiro, Brazil

    OpenAIRE

    Giovana Valverde Lima; Lídia Miyako Yoshii Oshiro

    2002-01-01

    The reproductive aspects of the freshwater shrimp Potimirim glabra (Kingsley, 1878) were studied from September 1997 to February 1999. Monthly, samples were collected with sieves, on the river edge, under the edging vegetation or in small pools. At the laboratory, shrimps were sexed and measured in their total lenght, from the tip of the rostrum to the end of telson with precision callipers. The ovigerous shrimps were separated and counted for fecundity determination. The eggs diameter was me...

  2. 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

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    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.

  3. Parastacus pugnax (Poeppig, 1835) (Crustacea, Decapoda, Parastacidae): conocimiento biológico, presión extractiva y perspectivas de cultivo/Parastacus pugnax (Poeppig, 1835) (Crustacea, Decapoda, Parastacidae): biological knowledge, extraction pressure and culture perspectives

    National Research Council Canada - National Science Library

    Erich H Rudolph

    2013-01-01

    ...: systematic, geographical distribution, habitat, burrowing behavior, morphological variation, teratological cases, size, length-weight relationship, size structure, population density, reproductive...

  4. Descrição de Austinixa bragantina sp. nov. (Crustacea, Decapoda, Pinnotheridae do litoral do Pará, Brasil Description of Austinixa bragantina, sp. nov. (Crustacea, Decapoda, Pinnotheridae from the coast of Pará State, Brazil

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    Petrônio A. Coelho

    2005-09-01

    Full Text Available É apresentada a descrição de Austinixa bragantina sp. nov., encontrada no litoral paraense em associação com os calianassídeos Lepidophthalmus siriboia Felder & Rodrigues, 1993 and Callichirus major (Say, 1818Austinixa bragantina sp. nov., found in Pará coast associated with the Callianassid Lepidophthalmus siriboia Felder & Rodrigues, 1993 and Callichirus major (Say, 1818, is described.

  5. Biologia reprodutiva de Macrobrachium olfersii (Wiegman (Crustacea, Decapoda, Palaemonidae coletados na Ilha de Santa Catarina, Brasil Reproductive biology of Macrobrachium olfersii (Wiegman (Crustacea, Decapoda, Palaemonidae collected at Santa Catarina's Island, Brazil

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    Dib Ammar

    2001-06-01

    Full Text Available The aim of this study is to characterize the reproductive features of Macrobrachium olfersii (Wiegman, 1836 from Santa Catarina's lsland. The animals were collected in freshwater streams of the Ratones Hidrografic Basin (site A1 and at the Peri's Pond (site A2. In the laboratory, the procedures of sexual differentiation were carried out to classify the individuais in males, females or ovigerous females, followed by the determination of total weight (g, quelipod relative weight (g and total length (mm. The eggs were removed from the ovigerous females and counted. Sexual maturity and fecundity were analyzed based in the dimensions and number of eggs carried by ovigerous females. The water temperature on the capture sites varied from 17 to 29ºC throughout the months of study. A total of 503 individuais were captured, with 129 individuais from site A1 and 374 from site A2. The mean total size and length was 49.65 mm and 3.79 g for the males, 38.75 mm and 1.61 g for the females and 36.19 mm and 1.08 g for the ovigerous females. At the sites A1 and A2, the individual sexual maturity was reached with 27.3 and 21.2 mm of total length, respectively, while populational sexual maturity was estimated for the 45.0 to 50.0 mm class at site A1 and for the 30.0 to 35.0 mm class at site A2. The ovigerous females carried an average of 3464 eggs at site A1, and 1440 eggs at site A2. These reproductive features, presented by M. olfersii, show the species' plasticity, which can be associated with environmental variations, contributing to its reproductive success.

  6. Biologia dos Palaemonidae (Crustacea, Decapoda) da bacia hidrográfica de Ratones, Florianópolis, Santa Catarina, Brasil Biology of Palaemonidae (Crustacea, Decapoda) from the Ratones hidrografic basin, Florianópolis, Santa Catarina, Brazil

    OpenAIRE

    Yara Maria Rauh Müller; Evelise Maria Nazari; Dib Ammar; Eduardo Cargnin Ferreira; Ingrid Thaís Beltrame; Cristiane Pacheco

    1999-01-01

    Biological aspects of palemonids, collected from March, 91 to December, 95 in the Ratones Hidrographic Basin, Florianópolis, Santa Catarina, have been investigated. Individuals of different sizes of Macrobrachium acanthurus (Weigmann, 1836), Macrobrachium carcinus (Linnaeus, 1758), Macrobrachium olfersii (Weigmann, 1836), Macrobrachium potiuna (Müller, 1880), Palaemonetes argentinus Nobili, 1901 and Palaemon pandaliformis (Stimpson, 1871) were registered. These prawns, showed reproductive str...

  7. Biologia dos Palaemonidae (Crustacea, Decapoda da bacia hidrográfica de Ratones, Florianópolis, Santa Catarina, Brasil Biology of Palaemonidae (Crustacea, Decapoda from the Ratones hidrografic basin, Florianópolis, Santa Catarina, Brazil

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    Yara Maria Rauh Müller

    1999-01-01

    Full Text Available Biological aspects of palemonids, collected from March, 91 to December, 95 in the Ratones Hidrographic Basin, Florianópolis, Santa Catarina, have been investigated. Individuals of different sizes of Macrobrachium acanthurus (Weigmann, 1836, Macrobrachium carcinus (Linnaeus, 1758, Macrobrachium olfersii (Weigmann, 1836, Macrobrachium potiuna (Müller, 1880, Palaemonetes argentinus Nobili, 1901 and Palaemon pandaliformis (Stimpson, 1871 were registered. These prawns, showed reproductive strategies, typical of the Palaemonidae (Rafinesque, 1815, associated to species particularities, and seem to adapt to different environmental conditions.

  8. Parastacus pugnax (Poeppig, 1835) (Crustacea, Decapoda, Parastacidae): conocimiento biológico, presión extractiva y perspectivas de cultivo/Parastacus pugnax (Poeppig, 1835) (Crustacea, Decapoda, Parastacidae): biological knowledge, extraction pressure and culture perspectives

    National Research Council Canada - National Science Library

    Erich H Rudolph

    2013-01-01

      The burrowing crayfish, Parastacus pugnax (Poeppig, 1835), is one of six species of the family Parastacidae inhabiting the fresh waters of Chile, which supports the greatest extraction effort for human consumption...

  9. 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

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    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

  10. 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.

  11. 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.

  12. 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.

  13. Identification, Characterization, and Diel Pattern of Expression of Canonical Clock Genes in Nephrops norvegicus (Crustacea: Decapoda) Eyestalk

    Science.gov (United States)

    Sbragaglia, Valerio; Lamanna, Francesco; M. Mat, Audrey; Rotllant, Guiomar; Joly, Silvia; Ketmaier, Valerio; de la Iglesia, Horacio O.; Aguzzi, Jacopo

    2015-01-01

    The Norway lobster, Nephrops norvegicus, is a burrowing decapod with a rhythmic burrow emergence (24 h) governed by the circadian system. It is an important resource for European fisheries and its behavior deeply affects its availability. The current knowledge of Nephrops circadian biology is phenomenological as it is currently the case for almost all crustaceans. In attempt to elucidate the putative molecular mechanisms underlying circadian gene regulation in Nephrops, we used a transcriptomics approach on cDNA extracted from the eyestalk, a structure playing a crucial role in controlling behavior of decapods. We studied 14 male lobsters under 12–12 light-darkness blue light cycle. We used the Hiseq 2000 Illumina platform to sequence two eyestalk libraries (under light and darkness conditions) obtaining about 90 millions 100-bp paired-end reads. Trinity was used for the de novo reconstruction of transcriptomes; the size at which half of all assembled bases reside in contigs (N50) was equal to 1796 (light) and 2055 (darkness). We found a list of candidate clock genes and focused our attention on canonical ones: timeless, period, clock and bmal1. The cloning of assembled fragments validated Trinity outputs. The putative Nephrops clock genes showed high levels of identity (blastx on NCBI) with known crustacean clock gene homologs such as Eurydice pulchra (period: 47%, timeless: 59%, bmal1: 79%) and Macrobrachium rosenbergii (clock: 100%). We also found a vertebrate-like cryptochrome 2. RT-qPCR showed that only timeless had a robust diel pattern of expression. Our data are in accordance with the current knowledge of the crustacean circadian clock, reinforcing the idea that the molecular clockwork of this group shows some differences with the established model in Drosophila melanogaster. PMID:26524198

  14. The effect of the macroconsumer Aegla longirostri (Crustacea, Decapoda on the invertebrate community in a subtropical stream

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    Gláucia Bolzan Cogo

    2014-06-01

    Full Text Available AIM: This study tested whether the macroconsumer Aegla longirostri is able to modify the invertebrate community associated with decomposing leaves. METHODS: The study was performed in a first-order stream located in central Rio Grande do Sul state. Two types of channels containing leaf litter of Ficus luschnathiana were placed in the stream; one type allowed aeglids to access the leaf litter (PA, and the other type did not (AA. Both types allowed aquatic insects to access the leaf litter. In addition, a control treatment (C was established, in which no channel was used. After 3, 7, 11, 15 and 19 days, a litter bag was removed from each replicate of each treatment. RESULTS: A total of 926 organisms belonging to 19 families were identified. The most common taxon in all treatments was Chironomidae, which comprised 71% of the total and was represented by 16 genera. The presence of aeglids decreased the total abundance of organisms by 89% and the taxonomic richness by 35%. The presence of A. longirostri altered the taxonomic composition of the invertebrates and the structure of the trophic groups, causing a decrease in the abundance of all groups, except for shredders and predators. The gathering-collectors trophic group was the most important (65%, in both the presence and absence of A. longirostri. CONCLUSION: Our study showed that A. longirostri, as well as other macroconsumers, was able to modify the structure of the invertebrate community associated with decomposing leaves in the stream.

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

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    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.

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

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    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.

  17. 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.

  18. The Effect of the Crayfish Orconectes virilis (Crustacea: Decapoda: Cambaridae) in the Decomposition and Succession of Submerged Small Mammal Carrion

    Science.gov (United States)

    de Jong, G. D.; Chadwick, J. W.

    2005-05-01

    The role of the crayfish Orconectes virilis in the decomposition of submerged rat carrion and succession of other benthic macroinvertebrates was experimentally investigated in Slaughterhouse Gulch, a small, urban stream in Littleton, Colorado. Crayfish participation in carrion decomposition significantly altered the decomposition rate of the carrion. Nine carcasses were exposed in anchored minnow traps at three degrees of crayfish access: crayfish always present, crayfish having free access, and crayfish excluded. These three treatments required 23 days, 29 days, and 65 days, respectively, for complete decomposition of the rat carrion (carrion, being present in densities of <5 individuals/carcass early in succession and in larger densities (up to 25 individuals/carcass) after extensive decomposition and exposure of the viscera.

  19. 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

  20. Cloning and sequencing analysis of three amylase cDNAs in the shrimp Penaeus vannamei (Crustacea decapoda): evolutionary aspects.

    Science.gov (United States)

    Van Wormhoudt, A; Sellos, D

    1996-05-01

    In Penaeus vannamei, alpha-amylase is the most important glucosidase and is present as at least two major isoenzymes which have been purified. In order to obtain information on their structure, a hepatopancreas cDNA library constructed in phage lambda-Zap II (Strategene) was screened using a synthetic oligonucleotide based on the amino acid sequence of a V8 staphylococcal protease peptide of P. vannamei alpha-amylase. Three clones were selected: AMY SK 37 (EMBL sequence accession number: X 77318) is the most complete of the analyzed clones and was completely sequenced. It contains the complete cDNA sequence coding for one of the major isoenzymes of shrimp amylase. The deduced amino acid sequence shows the existence of a 511-residue-long pre-enzyme containing a highly hydrophobic signal peptide of 16 amino acids. Northern hybridization of total RNA with the amylase cDNA confirms the size of the messenger at around 1,600 bases. AMY SK 28, which contains the complete mature sequence of amylase, belonged to the same family characterized by a common 3' terminus and presented four amino acid changes. Some other variants of this family were also partially sequenced. AMY SK 20 was found to encode a minor variant of the protein with a different 3' terminus and 57 amino acid changes. Phylogenetic analysis established with the conserved amino acid regions of the (beta/alpha) eight-barrel domain and with the total sequence of P. vannamei showed close evolutionary relationships with mammals (59-63% identity) and with insect alpha-amylase (52-62% identity). The use of conserved sequences increased the level of similarity but it did not alter the ordering of the groupings. Location of the secondary structure elements confirmed the high level of sequence similarity of shrimp alpha-amylase with pig alpha-amylase.

  1. Molecular cloning of Ras cDNA from Penaeus japonicus (Crustacea, decapoda): geranylgeranylation and guanine nucleotide binding.

    Science.gov (United States)

    Huang, C F; Chuang, N N

    1998-12-11

    A cDNA was isolated from the shrimp Penaeus japonicus by homology cloning. The shrimp hepatopancreas cDNA encodes a 187-residue polypeptide whose predicted amino acid sequence shares 85% homology with mammalian K-Ras 4B protein and demonstrates identity in the guanine nucleotide binding domains. Expression of the shrimp cDNA in Escherichia coli yielded a 21-kDa polypeptide with a positive reactivity towards the monoclonal antibodies against mammalian Ras. The GTP binding of the shrimp ras-encoded fusion protein was approximated to be 30000units/mg of protein, whereas the binding for GDP was 5000units/mg of protein. Fluorography analysis demonstrated that the prenylation of both shrimp Ras GDP and shrimp Ras GTP by protein geranylgeranyltransferase I of shrimp Penaeus japonicus exceeded the shrimp Ras nucleotide-free form by 10-fold, and fourfold, respectively; that is, the shrimp protein geranylgeranyltransferase I prefers to react with the shrimp ras-encoded p25 fusion protein in the GDP-bound form.

  2. 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 coa

  3. Description of two new species of the genus Automate De Man, 1888 (Crustacea: Decapoda: Caridea) from the South China Sea.

    Science.gov (United States)

    Wang, Yan-Rong; Sha, Zhong-Li

    2017-03-02

    Three species of the genus Automate De Man, 1888 are described herein, including two new species: A. anacanthopusoides sp. nov. and A. spinosa sp. nov.. Automate anacanthopusoides sp. nov. can be easily identified by the presence of a rostrum, the notch on the lower margin of the major chela, the stout minor cheliped and the cutting edge of the pollex not dentate, and by the absence of spines on the ventral margin of the propodus of the third and fourth pereiopod. Automate spinosa sp. nov. can be easily identified by the nearly straight anterior margin of the carapace, and the presence of spines on the ventral margin of the propodus of third and fourth pereiopod. A key of all species of the Automate is provided.

  4. 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.

    Investigations on gonado-somatic index, stages of maturity and fecundity of Parapenaeopsis stylifera were carried out from the Neendakara zone, Kerala coast, India for a period of one year. Females with mature ovaries occurred throughout the year...

  5. Crescimento de Callinectes sapidus (Crustacea, Decapoda, Portunidae no estuário da laguna dos Patos, RS, Brasil

    Directory of Open Access Journals (Sweden)

    Leonardo S. Ferreira

    2008-03-01

    Full Text Available Utilizando o método de deslocamento modal para a identificação das idades, estimou-se o crescimento do siri-azul Callinectes sapidus Rathbun, 1896 em duas áreas de pesca no estuário da Lagoa dos Patos. Os indivíduos foram coletados entre fevereiro de 2005 e março de 2006 no Saco da Mangueira e Saco do Arraial por meio de arrasto de rede de portas da pesca artesanal. Coletou-se um total de 2.609 animais, sendo 1.193 machos e 1.416 fêmeas. Para obtenção das curvas de crescimento utilizou-se o modelo de von Bertalanffy. As curvas foram validadas pela sua adequação ao ciclo de vida e aspectos biológicos da espécie. O tamanho máximo de largura de carapaça (LCmáx utilizado foi mantido fixo em todas as análises (LCmáx=162,71mm; ± d.p.=3,10 para machos e LCmáx=157,78mm; ± d.p.=5,45 para fêmeas, sendo esses valores médios das maiores medidas obtidas em mais de 20 anos de coletas no estuário. Os parâmetros de crescimento e longevidade foram estimados para machos (Saco da Mangueira, K=0,0039/dia; t o=-6.07; 1.195 dias; Saco do Arraial, K=0,0041/dia; t o=-5,84; 1.102 dias e fêmeas (Saco da Mangueira, K=0,0040/dia; t o=-6,22; 1.153 dias; Saco do Arraial, K=0,0039/dia; t o=-5.91; 1.181 dias. As curvas de crescimento estimadas nesse trabalho denotam que a espécie atinge o tamanho mínimo de captura praticamente no primeiro ano de vida (120mm.

  6. 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

  7. 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

  8. Light-dependent genetic and phenotypic differences in the squat lobster Munida tenuimana (Crustacea: Decapoda) along deep continental margins

    Science.gov (United States)

    Aguzzi, J.; Costa, C.; Ketmaier, V.; Angelini, C.; Antonucci, F.; Menesatti, P.; Company, J. B.

    2013-11-01

    The levels of environmental light experienced by organisms during the behavioral activity phase deeply influence the performance of important ecological tasks. As a result, their shape and coloring may experience a light-driven selection process via the day-night rhythmic behavior. In this study, we tested the phenotypic and genetic variability of the western Mediterranean squat lobster (Munida tenuimana). We sampled at depths with different photic conditions and potentially, different burrow emergence rhythms. We performed day-night hauling at different depths, above and below the twilight zone end (i.e., 700 m, 1200 m, 1350 m, and 1500 m), to portray the occurrence of any burrow emergence rhythmicity. Collected animals were screened for shape and size (by geometric morphometry), spectrum and color variation (by photometric analysis), as well as for sequence variation at the mitochondrial DNA gene encoding for the NADH dehydrogenase subunit I. We found that a weak genetic structuring and shape homogeneity occurred together with significant variations in size, with the smaller individuals living at the twilight zone inferior limit and the larger individuals above and below. The infra-red wavelengths of spectral reflectance varied significantly with depth while the blue-green ones were size-dependent and expressed in smaller animals, which has a very small spectral reflectance. The effects of solar and bioluminescence lighting are discussed as depth-dependent evolutionary forces likely influencing the behavioral rhythms and coloring of M. tenuimana.

  9. Complete mitochondrial genome of Australian spiny lobster, Panulirus cygnus (George, 1962) (Crustacea: Decapoda: Palinuridae) from coast of Australia.

    Science.gov (United States)

    Kim, Gyungryul; Yoon, Tae-Ho; Park, Won Gyu; Park, Jung Youn; Kang, Jung-Ha; Park, Hyun; Kim, Hyun Woo

    2016-11-01

    We characterized the total mitochondrial genome of Australian spiny lobster, Panulirus cygnus (George, 1962), which is found along the western coast of Australia. Total mitochondrial genome length of P. cygnus was 15 724 bp, in which 13 proteins, 2 ribosomal RNAs, 22 transfer RNAs, and a putative control region were encoded. Nine and four protein-coding genes are encoded on the H-strand and on the L-strand, respectively. According to the phylogenetic analysis, P. cygnus was most closely related to Panulirus japonicus among the compared six species belonging to Palinuridae. Although overall gene organization was the same, the putative control region (between SrRNA gene and tRNA(Ilel)) is least similar to one another among mitochondrial genomes from the compared six species belonging to Palinuridae.

  10. Structures of ovary and ovarian follicle in flathead lobster,Thenus orientalis (Lund, 1793) (Crustacea: Decapoda: Scyllarida)

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    The ovary contains four morphological components : (1) the ovarian wall, (2) therepro ductive epithelium, (3) the cellular layer containing oocytes, oogonia (especially for early-developing ovary) and follicle cells, and (4) the extensions of the ovarian wall. The ovarian wall and its extensions consist of blood vessels, sinuses, muscle cells and others. The extensions of the ovarian wall project into among the follicles and insert on the thick basal membrane of each follicle.From inside to outside, the follicles are composed of four parts: (1) the oocyte, (2) the perivitelline space, (3) the follicle cells, and (4) the basal membrane. The surface of the oocyte during vitellogenesis is folded into numerous long microvilli that project into the perivitelline space between the oocyte surface and the bace of the follicle cell layer. In addition, the plasma membrane of the vitellogenic oocyte contains many pinocytotic pits. The perivitelline space is engorged with more electrondenser material as the development of the follicle. The inclusion of perivitelline space in the mature follicle is named specially as the chorion. The chorion is composed of two region, a thinner exochorion and a thicker endochorion containing electron-dense granular material. The follicle cell layer is composed of a single layer of polygonal follicle cells which exhibit higher synthetic activity. The synthetic product of the follicle cell layer is one source for the inclusion of the perivitelline space.The structures of the ovary and ovarian follicle in T. orientalis show that the exogenously biosynthetic yolk plays important roles in the vitellogenesis.

  11. Uroptychus atlanticus, a new species of squat lobster (Crustacea: Decapoda: Anomura: Chirostylidae) from the western Atlantic Ocean.

    Science.gov (United States)

    Baba, Keiji; Wicksten, Mary K

    2017-02-02

    A new species of squat lobster, Uroptychus atlanticus, is described on the basis of a female specimen taken at a depth of 713-841 m in the southeastern Gulf of Mexico. The new species is readily distinguished from all known species of the genus from the western Atlantic by the very spinose carapace and pereopods, and a transverse row of spines on each of the abdominal tergites 1 and 2.

  12. 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.

  13. Revealing their innermost secrets: an evolutionary perspective on the disparity of the organ systems in anomuran crabs (Crustacea: Decapoda: Anomura)

    NARCIS (Netherlands)

    Keiler, J.; Richter, S.; Wirkner, C.S.

    2016-01-01

    The Southern Australian crustacean species Lomis hirta (Lomisoidea: Lomisidae) is a representative of one of the three anomuran taxa which obtained their crab-like habitus independently from each other. This process, the evolutionary transformation into a crab-like form, is termed carcinization. To

  14. The leucosiid crabs described by Thomas Bell in 1855: original description and dates of publication (Crustacea: Decapoda: Brachyura).

    Science.gov (United States)

    Lee, B Y; Low, Martyne E Y

    2013-01-01

    Thomas Bell proposed 37 species- and 5 genus-group names for the Leucosiidae in four publications that appeared in 1855. The version appearing in the Proceedings of the Linnean Society of London is the earliest of these publications and the first available description of these taxa.

  15. Phylogenetics of the brachyuran crabs (Crustacea: Decapoda): the status of Podotremata based on small subunit nuclear ribosomal RNA.

    Science.gov (United States)

    Ahyong, Shane T; Lai, Joelle C Y; Sharkey, Deirdre; Colgan, Donald J; Ng, Peter K L

    2007-11-01

    The true crabs, the Brachyura, are generally divided into two major groups: Eubrachyura or 'advanced' crabs, and Podotremata or 'primitive' crabs. The status of Podotremata is one of the most controversial issues in brachyuran systematics. The podotreme crabs, best recognised by the possession of gonopores on the coxae of the pereopods, have variously been regarded as mono-, para- or polyphyletic, or even as non-brachyuran. For the first time, the phylogenetic positions of the podotreme crabs were studied by cladistic analysis of small subunit nuclear ribosomal RNA sequences. Eight of 10 podotreme families were represented along with representatives of 17 eubrachyuran families. Under both maximum parsimony and Bayesian Inference, Podotremata was found to be significantly paraphyletic, comprising three major clades: Dromiacea, Raninoida, and Cyclodorippoida. The most 'basal' is Dromiacea, followed by Raninoida and Cylodorippoida. Notably, Cyclodorippoida was identified as the sister group of the Eubrachyura. Previous hypotheses that the dromiid crab, Hypoconcha, is an anomuran were unsupported, though Dromiidae as presently composed could be paraphyletic. Topologies constrained for podotreme monophyly were found to be significantly worse (P < 0.04) than unconstrained topologies under Templeton and S-H tests. The clear pattern of podotreme paraphyly and robustness of topologies recovered indicates that Podotremata as a formal concept is untenable. Relationships among the eubrachyurans were generally equivocal, though results indicate the majoids or dorippoids were the least derived of the Eubrachyura. A new high level classification of the Brachyura is proposed.

  16. Male internal reproductive structures of European pea crabs (Crustacea, Decapoda, Brachyura, Pinnotheridae): vas deferens morphology and spermatozoal ultrastructure.

    Science.gov (United States)

    Becker, Carola; Klaus, Sebastian; Tudge, Christopher C

    2013-11-01

    Pea crabs of the subfamily Pinnotherinae (Pinnotheridae) have a high investment in reproduction and an outstanding reproductive output, probably as an adaptation to the required increase in reproductive rate due to the pinnotherids small size and their parasitic, host-dependant way of life. In the present study, we investigate the male internal reproductive structures and the ultrastructure of spermatozoa of Pinnotheres pisum and Nepinnotheres pinnotheres by histological methods and both scanning- and transmission electron microscopy. In the Brachyura, the male internal reproductive systems generally consist of paired testes and corresponding vasa deferentia where spermatozoa develop and mature. Spermatozoal ultrastructure of the investigated pinnotherids conforms to the thoracotreme type, however, N. pinnotheres has an accessory opercular ring and a periopercular rim, neither of which are present in spermatozoa of P. pisum. Spermatozoa are enclosed within spermatophores in the secretory proximal vas deferens. Two types of secretions were observed in P. pisum and N. pinnotheres: an electron dense substance secreted in the proximal vas deferens involved in spermatophore formation, and large electron-luscent vesicles constituting the seminal plasma in the medial and distal vas deferens. The medial vas deferens is strongly widened compared to other brachyurans to purpose storing spermatophores embedded in seminal plasma. Tubular appendices, which produce and store large amounts of seminal plasma, arise from the distal region of the vas deferens. The appendices extend into the ventral cephalothorax and also in the first pleomere. The latter being an exceptional location for reproductive structures among male brachyurans.

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

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    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.

  18. Functional morphology of the copulatory system of box crabs with long second gonopods (Calappidae, Eubrachyura, Decapoda, Crustacea).

    Science.gov (United States)

    Ewers-Saucedo, Christine; Hayer, Sarah; Brandis, Dirk

    2015-01-01

    Male True Crabs use two pairs of gonopods to deliver mating products during copulation. Commonly, the second pair is shorter than the first pair, and most research to date has focused on species with short second gonopods. We investigated male and female copulatory organs in Calappula saussurei and Calappa pelii, two species of box crabs (Calappidae) with second gonopods which are longer than the first pair. Scanning electron microscopy and histological cross sectioning show that the female copulatory system is unique in several aspects: the genital duct is part concave and part simple type. The seminal receptacle is divided into two chambers, a ventral chamber of ectodermal and mesodermal origin, and a dorsal chamber of ectodermal origin. This dorsal chamber is the location of spermatophore reception during copulation. A sperm plug closes the dorsal chamber off. We propose that long second gonopods deliver male mating products directly into the dorsal chamber. To date, spermatophore reception has been associated with the mesodermal tissue of the seminal receptacle. The copulatory system of box crabs with long second gonopods shows novel deviations from this general pattern.

  19. Ecological distribution and population structure of Acantholobulus schmitti (Rathbun, 1930 (Crustacea, Decapoda, Xanthoidea on the southeastern Brazilian coast

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    Vivian Fransozo

    2013-12-01

    Full Text Available This investigation analyzed the ecological distribution and population structure of A. schmitti on the southeastern coast of Brazil. Crabs were sampled monthly from January 1998 to December 1999 at the following bays: Ubatumirim (UBM, Ubatuba (UBA and Mar Virado (MV. Water and sediment samples were also collected from all sampling sites for an analysis of environmental factors. Acantholobus schmitti was most abundant at UBM (224, followed by UBA (154 and MV (23 but its abundance showed no association with the environmental factors analyzed. The low abundance of these crabs in MV may be due to the high wave action that moved biodetritic material accumulated on the bottom and frequently removed small crabs from their sheltered positions among the shell fragments. The individuals captured included 269 males and 132 females, of which only 4 specimens were brooding females. Juvenile recruitment occurred throughout the year, but was less intense in the spring. The major abundance of individuals as well as of ovigerous females occurred during 1999, when the entrance of the South Atlantic Central Waters (SACW was stronger than in previous year. This environmental influence could be the main factor modulating this population.

  20. On a collection of calappid crabs (Crustacea: Decapoda: Brachyura) from Fiji, with a description of a new species of Mursia.

    Science.gov (United States)

    Galil, Bella S

    2013-11-07

    Seven species of calappid crabs were identified from material collected during four IRD-MNHN expeditions conducted in 1998 and 1999 in shallow and deep waters off Fiji. Six species are reported for the first time from the islands. One new species, Mursia murimura n. sp., is described and illustrated. The new species differs from the closely related M. diwata Galil & Takeda, 2004, with which it shares a stout, distally auriculated first male pleopod, by possessing much longer lateral carapacial and cheliped spines.

  1. Insular species of Afrotropical freshwater crabs (Crustacea: Decapoda: Brachyura: Potamonautidae and Potamidae) with special reference to Madagascar and the Seychelles

    NARCIS (Netherlands)

    Cumberlidge, N.

    2008-01-01

    The evolutionary relationships between island and mainland faunas of the 24 species of insular freshwater crabs in the Afrotropical region are reviewed in the light of phylogenetic studies. Twenty insular species of freshwater crabs are endemic, and four are also found on the neighboring mainland of

  2. Characterization and sequence analysis of manganese superoxide dismutases from Brachyura (Crustacea: Decapoda): hydrothermal Bythograeidae versus littoral crabs.

    Science.gov (United States)

    Marchand, J; Leignel, V; Moreau, B; Chénais, B

    2009-06-01

    Hydrothermal vent conditions are particular and organisms living in these environments may have developed detoxification mechanisms and/or genetic adaptations. In particular, physico-chemical conditions are thought to generate reactive oxygen species, highly toxic for organisms. The enzyme superoxide dismutase constitutes the first line of defense against oxidative damage. To improve our understanding of the environmental impacts exerted on the vent organisms, we have characterized the two manganese superoxide dismutase cDNAs (mitochondrial: mMnSOD and cytoplasmic: cMnSOD) of three members of the Bythograeidae (Bythograea thermydron, Cyanagraea praedator and Segonzacia mesatlantica), the only endemic crab family living in hydrothermal vents. In comparison, the isolation of manganese superoxide dismutase cDNAs was also carried out in several littoral crab families. MnSOD signatures were found in both sequences from each species studied, as well as different residues involved in metal coordination and protein activity. The phylogenetic analysis performed confirms the probable ancient duplication that gave rise to the two MnSODs (cMnSOD and mMnSOD). This study describes two potential distinct mMnSOD isoforms presenting particular peptide signals. Nevertheless, no sequence particularity that could support the hypothesis of a genetic adaptation was found in Bythograeidae's MnSODs compared to the other sequences. The mRNA expression analysis performed by real-time PCR on B. thermydron and S. mesatlantica compared to Cancer pagurus and Necora puber revealed a higher cMnSOD and mMnSOD mRNA expression in hydrothermal crabs compared to littoral crabs.

  3. Taxonomy of the freshwater crabs of Costa Rica, with a revision of the genus Ptychophallus Smalley, 1964 (Crustacea: Decapoda: Pseudothelphusidae).

    Science.gov (United States)

    Magalhães, Célio; Wehrtmann, Ingo S; Lara, Luis Rólier; Mantelatto, Fernando L

    2015-01-13

    The taxonomy and geographic distribution of the freshwater crabs of the family Pseudothelphusidae Ortmann, 1893, of Costa Rica, Central America, particularly of the genus Ptychophallus Smalley, 1964, are revised. Historical materials deposited in major collections of several institutions were examined, as well as valuable collections in the Zoological Museum of the University of Costa Rica that include abundant specimens obtained recently (2007-2010) in the southern region of the country. The pseudothelphusids of Costa Rica consists of 15 currently valid species belonging to Achlidon Smalley, 1964 (two species), Allacanthos Smalley, 1964 (two species), Potamocarcinus H. Milne Edwards, 1853 (three species), and Ptychophallus (eight species). Two species seem to be restricted to the Atlantic drainage, while seven are known only from the Pacific drainage; six species occur in both drainages. Ptychophallus comprises 13 valid species; four new synonymies are proposed: P. osaensis Rodríguez, 2001, P. campylus Pretzmann, 1968, P. tumimanus ingae            Pretzmann, 1978, and P. barbillaensis Rodríguez & Hedström, 2001, as junior synonyms of P. paraxantusi (Bott, 1968), P. tristani (Rathbum 1896), P. tumimanus (Rathbun, 1898), and P. uncinatus Campos & Lemaitre, 1999, respectively. Two species, P. colombianus (Rathbun, 1896) and P. exilipes (Rathbun, 1898), are considered species inquerendae. Lectotype designations are made for P. montanus and P. colombianus. Three species of Ptychophallus are known exclusively from Costa Rica, five exclusively from Panama, and five species occur in both countries; one species appears to be exclusive of the Atlantic drainage, whereas five are known only from the Pacific drainage and seven occur in both drainages. The gonopod morphology of all species is redescribed and illustrated, and maps of their geographic distribution are furnished. A key to the species of Pseudothelphusidae from Costa Rica and to all species of Ptychophallus is provided. 

  4. Reproductive cycle of the swimming crab Portunus spinimanus Latreille (Crustacea, Decapoda, Brachyura from Ubatuba, São Paulo, Brazil

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    Sandro Santos

    1999-01-01

    Full Text Available This study analyses some reproductive aspects of Portunus spinimanus Latreille, 1819, a crab usually commercialized in Ubatuba region. Monthly otter-trawl collections were taken for two years along the northern coast of São Paulo State, Brazil. The reproductive period was studied based on the frequency of ovigerous females in the population along the year; the frequency of physiologically mature swimming crabs and the type of spawn. The condition of development of ovigerous females ovary was associated with the stage of eggs development. This species presents continuous reproduction in Ubatuba region and total spawn, but with successive broods, which suggests a multiple spawn during the reproduction period.

  5. Impact of maintenance of Macrobrachium rosenbergii De Man, 1879 (Crustacea, Decapoda, Palaemonidae broodstock on the water used in culture ponds

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    JFV. Biudes

    Full Text Available Aquaculture production generates social and economic benefits, but can also cause environmental impacts. The objectives of this study were: a to characterise the impacts caused by the maintenance of broodstock of the giant river prawn (Macrobrachium rosenbergii on the physical and chemical characteristics of the water used in culture ponds, and b to evaluate the relationship between the biomass of the prawns and the impact of culture on the water used in the ponds. Between January and December 2004, we determined, monthly, the biomass of M. rosenbergii by means of biometrics, and the physical and chemical variables of the supply and effluent water from a pond used to maintain breeding stock. The results showed that the effluent water had higher contents of chlorophyll-a, suspended particulate matter (SPM, pH, dissolved oxygen, total Kjeldahl nitrogen (TKN and dissolved Kjeldahl nitrogen (DKN, inorganic nitrogen (IN, total (TP and dissolved phosphorus (DP, and P-orthophosphate than the supply water. The highest biomass of M. rosenbergii occurred in April (127.0 g.m-2 and the lowest in August (71.5 g.m-2, and there were positive linear correlations between the biomass of the prawns and the intensity of the increases in TKN, DKN, IN, TP, and DP of the water used in the pond. The maintenance of broodstock of M. rosenbergii increased the chlorophyll-a, SPM, nitrogen, and phosphorus contents of the water in the pond. Additionally, the increase in the biomass of the prawns intensifies the export of nitrogen and phosphorus from the pond in the effluent.

  6. A NEW SPECIES OF RANINOIDES (CRUSTACEA: DECAPODA:RANINIDAE) FROM OFF THE SOUTHEASTERN COAST OF HAINAN ISLAND AND NANSHA ISLANDS

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    Raninoides longifions new species, off SE coast of Hainan Island, dorsal surface of carapace with an arched granular edge across carapace between the anterolateral teeth, median frontal tooth longest, second frontal teeth subquadrate.

  7. 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 th

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

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    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.

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

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    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.

  10. Identification, Characterization, and Diel Pattern of Expression of Canonical Clock Genes in Nephrops norvegicus (Crustacea: Decapoda Eyestalk.

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    Valerio Sbragaglia

    Full Text Available The Norway lobster, Nephrops norvegicus, is a burrowing decapod with a rhythmic burrow emergence (24 h governed by the circadian system. It is an important resource for European fisheries and its behavior deeply affects its availability. The current knowledge of Nephrops circadian biology is phenomenological as it is currently the case for almost all crustaceans. In attempt to elucidate the putative molecular mechanisms underlying circadian gene regulation in Nephrops, we used a transcriptomics approach on cDNA extracted from the eyestalk, a structure playing a crucial role in controlling behavior of decapods. We studied 14 male lobsters under 12-12 light-darkness blue light cycle. We used the Hiseq 2000 Illumina platform to sequence two eyestalk libraries (under light and darkness conditions obtaining about 90 millions 100-bp paired-end reads. Trinity was used for the de novo reconstruction of transcriptomes; the size at which half of all assembled bases reside in contigs (N50 was equal to 1796 (light and 2055 (darkness. We found a list of candidate clock genes and focused our attention on canonical ones: timeless, period, clock and bmal1. The cloning of assembled fragments validated Trinity outputs. The putative Nephrops clock genes showed high levels of identity (blastx on NCBI with known crustacean clock gene homologs such as Eurydice pulchra (period: 47%, timeless: 59%, bmal1: 79% and Macrobrachium rosenbergii (clock: 100%. We also found a vertebrate-like cryptochrome 2. RT-qPCR showed that only timeless had a robust diel pattern of expression. Our data are in accordance with the current knowledge of the crustacean circadian clock, reinforcing the idea that the molecular clockwork of this group shows some differences with the established model in Drosophila melanogaster.

  11. 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.

  12. Embryonic development of four species of palaemonid prawns (Crustacea, Decapoda: pre-naupliar, naupliar and post-naupliar periods

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    Yara Müller

    2004-03-01

    Full Text Available The embryonic development of four species of the family Palaemonidae was studied under laboratory conditions. Adults of Macrobrachium olfersi (Wiegman, 1836, Macrobrachium potiuna (Müller, 1880, Palaemon pandaliformis (Stimpson, 1871 and Palaemonetes argentinus (Nobili, 1901 were collected in Santa Catarina Island, Santa Catarina, Brazil and maintained at 26ºC. The following embryonic characters were analyzed: egg shape, yolk organization and cleavage plane, naupliar and post-naupliar appendages, stomodeum, optical lobes, eyes, telson, embryo curvature and the space occupied by the embryo in the egg. Different rates of development were observed for the four species, with M. potiuna showing the longest time of embryogenesis. The species studied followed the pattern of embryogenesis of centrolecithal eggs, enabling the identification of similar features of the development, and the establishment of eight common embryonic stages.Foi estudado o desenvolvimento embrionário de quatro espécies de Palaemonidae em condições controladas de laboratório. Adultos de Macrobrachium olfersi (Wiegman, 1836, Macrobrachium potiuna (Müller, 1880, Palaemon pandaliformis (Stimpson, 1871 e Palaemonetes argentinus (Nobili, 1901 foram coletados na Ilha de Santa Catarina, SC, Brasil e mantidos à temperatura de 26ºC. Foram analisadas as seguintes características embrionárias: forma do ovo, organização do vitelo e planos de clivagem, apêndices naupliares e pós-naupliares, estomodeo, lobos ópticos, olhos, telson, curvatura do embrião e o espaço ocupado pelo embrião no ovo. Diferentes ritmos de desenvolvimento foram observados espécies, sendo que M. potiuna mostrou o maior tempo de embriogênese. As espécies seguem o padrão de embriogênese de ovos centrolécitos, sendo identificadas características similares do desenvolvimento, possibilitando o estabelecimento de oito estágios embrionários, comuns as quatro espécies.

  13. Complete mitochondrial genome of the Chinese spiny lobster Panulirus stimpsoni (Crustacea: Decapoda): genome characterization and phylogenetic considerations.

    Science.gov (United States)

    Liu, Yuan; Cui, Zhaoxia

    2011-01-01

    The genetics and molecular biology of the commercially important Chinese spiny lobster, Panulirus stimpsoni are little known. Here, we present the complete mitochondrial genome sequence of P. stimpsoni, determined by the long polymerase chain reaction and primer walking sequencing method. The entire genome is 15,677 bp in length, encoding the standard set of 13 protein-coding genes, two ribosomal RNA genes, and 22 transfer RNA genes. The overall A+T content of the genome is 65.6%, lower than most malacostracan species. The gene order is consistent with the pancrustacean ground pattern. Several conserved elements were identified from P. stimpsoni control region, viz. one [TA(A)]n-block, two GA-blocks and three hairpin structures. However, the position of [TA(A)]n-block and number of hairpin structure are different from those in the congeneric P. japonicus and other decapods. Phylogenetic analyses using the concatenated nucleotide and amino acid sequences of 13 protein-coding genes do not support the monophyly of suborder Pleocyemata, which is in contrast to most morphological and molecular results. However, the position of Palinura and Astacidea is unstable, as represented by the basal or sister branches to other Reptantia species. P. stimpsoni, as the second species of Palinura with complete mitochondrial genome available, will provide important information on both genomics and conservation biology of the group.

  14. Homarus gammarus (Crustacea: Decapoda) larvae under an ocean acidification scenario: Responses across different levels of biological organization.

    Science.gov (United States)

    Rato, Lénia D; Novais, Sara C; Lemos, Marco F L; Alves, Luís M F; Leandro, Sérgio M

    2017-09-17

    The present study evaluated the effects of exposure to different target pCO2 levels: control (C: 370μatm, pH = 8.15) and ocean acidification (OA: 710μatm, pH=7.85) on development and biochemical responses related with oxidative stress and energy metabolism during the crustacean Homarus gammarus (L.) larval development, integrating different levels of biological organization. After hatching in the laboratory, larvae from the same female brood were exposed to the described conditions from hatching until reaching Stage III (last larval stage - 11 days). H. gammarus larvae demonstrated some susceptibility when addressing the predicted pCO2 levels for 2100. Further analysis at the biochemical and physiological level highlighted the occurrence of oxidative stress in the OA scenario (Superoxide Dismutase reduction and higher DNA damage) that was followed by developmental effects, increased inter-moult period from SII to SIII and reduced growth. The extended exposure to these conditions may affect organisms' key life-cycle functions such as physiological resistance, growth, sexual maturation, or reproduction with implications in their future fitness and population dynamics. Copyright © 2017. Published by Elsevier Inc.

  15. "Candidatus Hepatobacter penaei," an intracellular pathogenic enteric bacterium in the hepatopancreas of the marine shrimp Penaeus vannamei (Crustacea: Decapoda).

    Science.gov (United States)

    Nunan, Linda M; Pantoja, Carlos R; Gomez-Jimenez, Silvia; Lightner, Donald V

    2013-02-01

    The bacteria that cause necrotizing hepatopancreatitis in Penaeus vannamei adversely affect penaeid shrimp cultured in the western hemisphere. 16S rRNA and gyrase B gene analyses determined the taxonomic position of these bacteria. The name "Candidatus Hepatobacter penaei" is proposed for these pathogenic bacteria, which are members of the Rickettsiales order.

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

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    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.

  17. The distribution of the crayfishes Orconectes limosus (Rafinesque) and Astacus astacus (L.) (Crustacea, Decapoda) in the Netherlands

    NARCIS (Netherlands)

    Geelen, J.F.M.

    1978-01-01

    INTRODUCTION According to Holthuis (1950a) the family Astacidae is represented in the Netherlands only by one species, Astacus astacus (L., 1758). Apart from a detailed description of the external anatomy, he gave the following data. The average size of the adults amounts to 80 mm, however, the maxi

  18. Two new species of South American freshwater crayfish genus Parastacus Huxley, 1879 (Crustacea: Decapoda: Parastacidae).

    Science.gov (United States)

    Ribeiro, Felipe Bezerra; Buckup, Ludwig; Gomes, Kelly Martinez; Araujo, Paula Beatriz

    2016-08-30

    Two new species of Parastacus Huxley, 1879 are described from material collected in the state of Rio Grande do Sul, southern Brazil: Parastacus fluviatilis sp. nov. from highland streams and Parastacus caeruleodactylus sp. nov. from wetlands. Parastacus fluviatilis sp. nov. is distinguished mainly by large chelipeds with dense setae cover on the cutting edge of fingers, telson subtriangular with two lateral blunt spines and strongly concave ventral surface of lateral process of thoracic sternites 6 and 7. Parastacus caeruleodactylus sp. nov. is distinguished mainly by blue cheliped fingers and a large gap between them, reduced abdomen, dorsal and ventral margins of dactylus, propodus and carpus of second pair of pereiopods with tufts of long setae and mid-dorsal carina of exopod of uropods unarmed. According to IUCN Red List criteria both species are considered endangered. Habitat characterization and a method for defining the shape of second abdominal pleura are also provided.

  19. 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 . .

  20. Maturation and growth curves of Macrobrachium Carcinus (Linnaeus) (Crustacea, Decapoda, Palaemonidae) from Ribeira de Iguape River, southern Brazil

    OpenAIRE

    Valenti,Wagner C; Jeanette de T.C. de Mello; Vera L Lobão

    1994-01-01

    In this paper, female Macrobrachium carcinus (Linnaeus, 1758) maturation curve, weight/length relationship, length and weight growth curves were studied. Prawns were captured, by traps, in Ribeira de Iguape river (24ºS and 47ºW), southern Brazil. There were used 207 females. It was observed that M. carcinus presents several spawnings during its life cycle and reproductive period goes on, at least till six years old. Weight/length relationship can be represented for the equation W = 8.73 E-3 L...

  1. Maturation and growth curves of Macrobrachium Carcinus (Linnaeus (Crustacea, Decapoda, Palaemonidae from Ribeira de Iguape River, southern Brazil

    Directory of Open Access Journals (Sweden)

    Wagner C Valenti

    1994-01-01

    Full Text Available In this paper, female Macrobrachium carcinus (Linnaeus, 1758 maturation curve, weight/length relationship, length and weight growth curves were studied. Prawns were captured, by traps, in Ribeira de Iguape river (24ºS and 47ºW, southern Brazil. There were used 207 females. It was observed that M. carcinus presents several spawnings during its life cycle and reproductive period goes on, at least till six years old. Weight/length relationship can be represented for the equation W = 8.73 E-3 L3.28. Expressions obtained for length and weight growth curves are Lt = 21 .0 (1-e-0493t and Wt= 190 (1-e-0493t3.28. respectively. A symptotic maximum length and asymptotic maximum weight are nearly attained at six and eight years old, respectively.

  2. Natural diet and feeding habits of a freshwater prawn (Macrobrachium carcinus: Crustacea, Decapoda) in the estuary of the Amazon River.

    OpenAIRE

    LIMA, J.F.; GARCIA, J. da S.; SILVA, T. C. da

    2014-01-01

    Macrobrachium carcinus is a Brazilian native prawn with recognized potential for use in aquaculture activities. However, there is little information about the natural diet and feeding habits of this species. The aim of this study was the identification of the diet items of M. carcinus based on the analysis of the stomach contents. Specimens were collected in the Amazon River estuary between January 2009 and January 2010. The stomach analysis was carried out by using the frequency of occurrenc...

  3. Composition of shrimp populations (Crustacea: Decapoda in non-vegetated areas of two river islands in a Brazilian Amazon estuary

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    Priscila Sousa Vilela da Nóbrega

    2013-12-01

    Full Text Available This study investigates the shrimp found in non-vegetated areas of an estuary of the Amazon River. We ascertained the input of juveniles, species' biometrics and the influence of environmental factors on the abundance of species. The samples were collected monthly, from August 2006 to July 2007, in two places in the estuary, each next to an island. For collecting, we used a manual trawl to perform three hauls per month, totaling 36 samples per site. The abundance of shrimps was estimated as a function of the density of specimens per unit area. We used the Spearman's correlation to test the hypothesis that there is significant correlation between the average of the environmental variables measured and variations in shrimp density. The Kruskal-Wallis and the Mann-Whitney tests showed that there were significant differences in environment factors (temperature and salinity among the months and sites. We obtained 6,091 shrimps, from which 5,231 (85.88% were caught off the Arapiranga Island and 860 (14.12% off the Mosqueiro Island, Palaemonidae and Penaeidae were the only families recorded. Five species were collected: Macrobrachium amazonicum (Heller, 1862, Macrobrachium surinamicum Holthuis, 1948, Macrobrachium carcinus (Linnaeus, 1758, Macrobrachium rosenbergii (De Man, 1879, and Farfantepenaeus subtilis (Pérez-Farfante, 1967. The latter (pink shrimp was found for the first time in oligohaline environments (0-8. Macrobrachium amazonicum was the most abundant species. The recruitment of M. amazonicum juveniles was continuous throughout the year. The population of M. surinamicum was composed by juveniles and adults and that of F. subtilis exclusively by juveniles. The environmental factors analyzed were variable throughout the year and seem to explain the patterns of shrimp species occurrence in the region, the variation in their abundance and juvenile recruitment.

  4. 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.

  5. 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

    2012-12-01

    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.

  6. 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.

  7. On a collection of Leucosioidea (Crustacea, Decapoda, Brachyura from Papua New Guinea, with the description of a new species

    Directory of Open Access Journals (Sweden)

    Bella S. Galil

    2015-11-01

    Full Text Available The collection of deep-sea pebble crabs (Leucosioidea during the BIOPAPUA Expedition, comprising 8 species, including a species new to science, is significant because although the previously described species had not been recorded from the Bismarck and western Solomon Seas, they occurred in at least one nearby location (New Caledonia, Vanuatu, Solomon Is. Praebebalia fungifera sp. nov. is described and illustrated. It differs from its closest congener, P. septemspinosa Sakai, 1983, in bearing fungiform granules dorsally on carapace, shorter chelipeds, the relatively stout male first gonopod with a preapical row of setae and the beak-like tip, as compared to the rounded granules dorsally on the carapace, greatly elongate chelipeds and the slim, elongate, distally curved gonopod of P. septemspinosa, preapically set with very long setae and a hook-like tip.

  8. 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.U.; Anil, A.C.; Sawant, S.S.; Venkat, K.

    on the Crabs obtained by the F.I.S. “Endeavour” on the coasts of Queensland, New South Wales, Victoria, South Australia and Tasmania. Commonwealth of Australia, Fisheries 5:95-155, Plates XVII-XLII. Rathbun M. 1923b. Descriptions of new species of crabs from...

  9. Great unexpected differences between two populations of the intertidal crab Neohelice granulata inhabiting close but contrasting habitats (Crustacea: Decapoda: Brachyura

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    Eduardo D. Spivak

    Full Text Available ABSTRACT Two populations of the Southwestern Atlantic burrowing crab, Neohelice granulata (Dana, 1851, are separated by only 190 km. They inhabit bays that drain into a Patagonian gulf in the southernmost limit of the geographical distribution of the species: San Antonio Bay (SAO and San José Gulf (RSJ. The population from SAO has been extensively studied, whereas that of RSJ has not. The main goal of this study is to compare the ecological and habitat characteristics of the two populations, based on samples collected on successive days during the middle of the reproductive season of the crab. The substrate of SAO is composed of a high proportion of gravel and scarce organic matter, whereas the substrate of RSJ presents twice as much silt and clay, and greater organic matter content. Crabs of both sexes were larger at RSJ. Fecundity and reproductive output were greater at RSJ. The size of females at maturity was smaller and their range was shorter at RSJ. Burrows were longer and wider at RSJ. Our results indicate that there are strong differences between the two populations, which might be correlated with local environmental differences, mainly substrate granulometry and food availability.

  10. A new species of Parastacus Huxley, 1879 (Crustacea, Decapoda, Parastacidae from a swamp forest in southern Brazil

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    Felipe Bezerra Ribeiro

    Full Text Available Abstract In this contribution we describe a new species of burrowing crayfish of the genus Parastacus Huxley, 1879 from a swamp forest in southern Brazil and determine its conservation status. The distinction of the new species is based on morphology and the mitochondrial DNA marker 16S rRNA. The extinction risk was assessed according to the sub-criterion B1 of IUCN that estimates the Extent of Occurrence (EOO. Parastacus tuerkayi sp. nov. is morphologically distinguishable from all species of Parastacus by having three lines of verrucous tubercles on the dorsomesial margin of the cheliped propodus and a suborbital angle exceeding 90°. The EOO comprises 647,674 km², and the species is classified as “endangered”. Phylogenetic relationships indicate the distinct position of this new species in relation to the already described species.

  11. First field record of mangrove crab Ucides cordatus (Crustacea: Decapoda: Ucididae recruits co-inhabiting burrows of conspecific crabs

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    Anders Jensen Schmidt

    2009-12-01

    Full Text Available Recruits of the mangrove crab Ucides cordatus (Linnaeus, 1763, rarely encountered in the field were found co-inhabiting burrows of larger male and female conspecifics in the mangrove forest. They were located in the sediment of the inner walls and burrow plugs. Average carapace width (CW of the hosting and co-inhabiting crabs was 3.8 ± 0.20 and 0.9 ± 0.03, respectively. As shown by the size-frequency distribution, while most recruits leave the conspecific burrows after reaching 1.0 cm CW, some stay until they reach a size of 2.5 cm CW. The results of this study contribute to a better understanding of recruitment patterns in this ecologically and economically important mangrove crab species. Follow-up studies are however needed to fully determine the role of conspecific burrows for juvenile habitat choice and survivorship in U. cordatus.

  12. 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.

  13. 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

    2013-07-01

    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.

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

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    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.

  15. 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 . .

  16. 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

  17. Eluma purpurascens, nieuw voor de Nederlandse fauna (Crustacea: Isopoda: Oniscoidea)

    NARCIS (Netherlands)

    Tempelman, D.; Berg, M.P.

    1997-01-01

    Eluma purpurascens, new for the Dutch fauna (Crustacea: Isopoda: Oniscoidea). The first Dutch specimen of Eluma purpurascens was found on 29 April 1994 on the Kaloot, east of Vlissingen, in the south-western province of Zeeland. One year later the species proved to be locally common along the southe

  18. 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, Provi

  19. BIODIVERSITY AND BIOGEOGRAPHY OF FRESHWATER CRUSTACEANS (DECAPODA: NATANTIA FROM VANUATU, A COMPARISON WITH FIJI AND NEW CALEDONIA.

    Directory of Open Access Journals (Sweden)

    MARQUET G.

    2002-01-01

    Full Text Available This is the first comprehensive study of freshwater decapoda crustaceans from Vanuatu. Of the nineteen species collected during this study, eighteen appear to be new records for the archipelago. However none of these species is endemic to Vanuatu, nine having a Pacific distribution and ten an Indo-Pacific distribution. Half of the species recorded were widely distributed in Vanuatu, whereas the others were more restricted. A comparison is made with the freshwater decapoda fauna of the two neighbouring archipelagoes namely, those of Fiji and New Caledonia, which have already been thoroughly surveyed.

  20. 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.

  1. Endemism in the Cladocera (Crustacea: Branchiopoda) of Southern Africa

    OpenAIRE

    2013-01-01

    We review the current state of knowledge and patterns of distribution in the endemic Cladocera (Crustacea: Branchiopoda) of Southern Africa and describe two species of the Western Cape, of which one is new to science. Frey (1993), Korovchinsky (2006) and Smirnov (2008) previously suggested that South Africa harbours few endemics in the Cladocera. In the current study, we show that so-called low endemism in this region is mainly attributed to our limited state of knowledge of the local clado...

  2. An annotated checklist of the Cladocera (Crustacea: Branchiopoda) of Colombia.

    Science.gov (United States)

    Kotov, Alexey A; Fuentes-Reinés, Juan M

    2015-11-20

    Based on the revision of available literature on the Colombian Cladocera (Crustacea: Branchiopoda), we present an annotated checklist, with taxonomical comments for all taxa recorded since the start of research on this group in the country in 1913. We have listed 101 valid taxa, of which most records belong to the Caribbean region of Colombia. The situation in Colombian Cladocera taxonomy is, at present, unfavorable for any realistic conclusions on biodiversity, ecology and biogeography.

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

    Directory of Open Access Journals (Sweden)

    Branco Joaquim Olinto

    2002-01-01

    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.

  4. 40 CFR 180.1071 - Peanuts, Tree Nuts, Milk, Soybeans, Eggs, Fish, Crustacea, and Wheat; exemption from the...

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 23 2010-07-01 2010-07-01 false Peanuts, Tree Nuts, Milk, Soybeans... Peanuts, Tree Nuts, Milk, Soybeans, Eggs, Fish, Crustacea, and Wheat; exemption from the requirement of a..., tree nuts, milk, soybeans, eggs (including putrescent eggs), fish, crustacea, and wheat are exempted...

  5. 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.

  6. Reference values for feeding parameters of isopods (Porcellioscaber, Isopoda, Crustacea).

    Science.gov (United States)

    Drobne, Damjana; Drobne, Samo

    2014-01-01

    The advantage of using terrestrial isopods in toxicity studies is that a battery of parameters can be tested at different levels of biological complexity. Feeding parameters for example link organism level response to potential ecological consequences but a problem with using feeding parameters in toxicity tests with terrestrial isopods is their high variability. The aim of our study was to set benchmark values for feeding parameters for isopod Porcellioscaber (Isopoda, Crustacea) in laboratory-controlled experiments. In the work presented here, the daily feeding rate of the central 50% of the control population of Porcellioscaber and a correlation between feeding rate and isopod weight were set. Values outside these ranges need additional evaluation to increase the relevance of test outcomes. We suggest using benchmark values for feeding parameters as well as the coefficient of variation (a) to identify animals with altered feeding parameters with respect to controls, and (b) to assess the data quality in each experiment.

  7. RNA interference with special reference to combating viruses of crustacea.

    Science.gov (United States)

    La Fauce, Kathy; Owens, Leigh

    2012-09-01

    RNA interference has evolved from being a nuisance biological phenomenon to a valuable research tool to determine gene function and as a therapeutic agent. Since pioneering observations regarding RNA interference were first reported in the 1990s from the nematode worm, plants and Drosophila, the RNAi phenomenon has since been reported in all eukaryotic organisms investigated from protozoans, plants, arthropods, fish and mammals. The design of RNAi therapeutics has progressed rapidly to designing dsRNA that can specifically and effectively silence disease related genes. Such technology has demonstrated the effective use of short interfering as therapeutics. In the absence of a B cell lineage in arthropods, and hence no long term vaccination strategy being available, the introduction of using RNA interference in crustacea may serve as an effective control and preventative measure for viral diseases for application in aquaculture.

  8. 50 CFR Appendix A to Part 622 - Species Tables

    Science.gov (United States)

    2010-10-01

    ...., Cleaner shrimp Family Squillidae, Mantis crabs Gonodactylus spp. Lysiosquilla spp. Family Stenopodidae.... Crustaceans—Subphylum Crustacea 1. Decapods—Order Decapoda Family Alpheidae Alpheaus armatus, Snapping shrimp... gibbesi, Nimble spray crab Family Hippolytidae Lysmata spp., Peppermint shrimp Thor amboinensis, Anemone...

  9. A new record of the giant freshwater prawn, Macrobrachium spinipes (Schenkel, 1902) (Crustacea: Decapoda: Palaemonidae) from Taiwan, with notes on its taxonomy.

    Science.gov (United States)

    Shy, Jhy-Yun; Wowor, Daisy; Ng, Peter K L

    2013-11-04

    The giant freshwater prawn Macrobrachium spinipes (Schenkel, 1902) is recorded from Taiwan for the first time and extends the distribution of the species to north of the Tropic of Cancer. The Taiwanese specimens differ slightly from material from Indonesian Papua in the density of the spination of the adult second pereipods, the relative length of the ridge of the posterior submedian plate of thoracite sternite 4, and the color of the carapace, abdomen and pleural condyles.

  10. 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.

  11. Provisional revision of American snapping shrimp allied to Alpheus floridanus Kingsley, 1878 (Crustacea: Decapoda: Alpheidae) with notes on A. floridanus africanus.

    Science.gov (United States)

    Bracken-Grissom, Heather D; Felder, Darryl L

    2014-12-17

    Alpheus floridanus Kingsley, 1878 has been previously treated as a single, morphologically diverse species with a broad distribution in the eastern and western Atlantic Ocean and eastern Pacific Ocean. However, variations in morphology and color patterns, in addition to genetic evidence, have prompted futher investigation. Morphological characters, including curvature and length of the scaphocerite, number teeth on the incisor process of the mandible, number of pereopodal spines, proportions of the major chela, as well as color patterns, support recognition of several species in the Alpheus floridanus complex. Alpheus floridanus sensu stricto (s.s.) is redescribed based upon a lectotype selected from the former syntypic pair. The mutilated second specimen of the syntypic pair is identified as A. platycheirus Boone, 1927, which is fully redescribed. Three species are described as new: A. hephaestus sp. nov. from the eastern Pacific, and A. roblesi sp. nov. and A. ulalae sp. nov. from the western Atlantic. Morphological comparisions to the eastern Atlantic A. floridanus africanus Balss, 1916 are discussed, however a formal treatment of this subspecies is not the objective of this study. Our proposed taxonomic revisions of the A. floridanus complex are supported in a companion molecular genetic analysis (following paper, this volume). 

  12. In situ observations on the habitat and abundance of the squat lobster Gastroptychus perarmatus (Haig, 1968 (Crustacea: Decapoda: Chirostylidae in the n orthern Gulf of California, Mexico

    Directory of Open Access Journals (Sweden)

    M.E. Hendrickx

    2013-12-01

    Full Text Available Living specimens of Gastroptychus perarmatus (Haig, 1968, a chirostylid squat lobster, were observed on colonies of gorgonian corals and sponges in the northern Gulf of California. Video footage and photographs obtained from the Remotely Operated Vehicle JASON dive north of Angel de La Guarda Island in the northern Gulf of California indicate that this squat lobster lives on coral specimens of Callogorgia, probably C. flabellum (Ehrenberg, 1834, and on one or two unidentified species of sponge(s. Seven sites were observed to contain G. perarmatus with the number of individuals per host varying from 2 to 11. No specimens were observed on the sea floor away from a host. Review of videos indicates that most individuals of G. perarmatus observed remained motionless in the same position throughout the video recording period (max. 30 seconds, with the body erect and the chelipeds extended, presumably to facilitate collection of organic particles transported by the current. At one site, however, the video shows one adult specimen grasping large particles of floating debris retained on the gorgonian. Until recently there were no records of G. perarmatus since it was described from California in depths of 229m (north of Anacapa Island. A few specimens were accidentally captured in a benthic sledge in the northern Gulf of California in 2011. This is a new record for the area, including a new maximum depth record (705-710 m for the species. This rare species of squat lobster and its host the gorgonian coral would be subject to severe environmental impacts if fishing or mining activities were developed in the area.

  13. First record of marine crab, Eucrate alcocki Serne, in Serène and Lohavanijaya, 1973 (Crustacea, Decapoda, Brachyura, Euryplacidae) from India

    Institute of Scientific and Technical Information of China (English)

    M. RAJKUMAR; K. P. KUMARAGURU VASAGAM; LI Xinzheng; SUN Jun

    2009-01-01

    This paper reports the occurrence of a marine brachyuran crab species Eucrate alcocki Serène, in Serène et al., 1973, of the family Euryplacidae Stimpson, 1871, for first time from India, based on a male specimen from Parangipettai fish landing centre in Bay of Bengal, Southeast Coast of India. Although morphologically corresponding with what is currently defined as E. alcocki, the color pattern of the carapace of the present specimen is rather different from that of the Chinese material-only the anterior fifth of the carapace is marked with scattered red spots, the rest of the surface is yellowish, with four unusually shaped red blotches which almost look like Sanskrit characters.

  14. Further observations on zooplankton of the Potengi Estuary (Natal, Rio Grande do Norte, Brazil with special reference to the larvae of Brachyura (Crustacea, Decapoda

    Directory of Open Access Journals (Sweden)

    C Sankarankutty

    1995-01-01

    Full Text Available The present paper deals with data on zooplankton collected from the estuary of Potengi, Natal, Rio Grande do Norte, Brazil covering a period of one year from October 1992 to October 1993. Three fixed stations within the estuary located at varying distances from the mouth of the river were sampled. Sampling was done monthly when the tide was lowest. Analysis of the samples has shown clear pattern of seasonal variations in abundance of the dominant zooplankton components which are composed of Copepoda, Appendicularia, larvae of Brachyura, larvae of Cirripedia and Chaetognalha. A detailed study of the larvae of Brachyura was also attempted which showed that seven species can be identified in the samples, of which those of Aratus pisonii (H. Milne Edwards and Cardisoma guanhumi Latreille have already been described. Other five species are designated here numerically and description of various stages present in the samples are given.

  15. Systematic status of the caridean families Gnathophyllidae Dana and Hymenoceridae Ortmann (Crustacea: Decapoda): a further examination based on molecular and morphological data

    Science.gov (United States)

    Gan, Zhibin; Li, Xinzheng; Kou, Qi; Chan, Tinyam; Chu, Kahou; Huang, Hui

    2015-01-01

    The four palaemonoid (sub)families Anchistioididae, Gnathophyllidae, Hymenoceridae, and Pontoniinae are similar in morphology, and all live in marine habitats. Their systematic relationships are controversial. In this study, we used sequences from a mitochondrial ribosomal gene (16S rRNA) and three nuclear genes (H3, NaK, and enolase) to explore the phylogenetic relationships of these four taxa. Our tree based on 43 species belonging to 28 genera shows that Gnathophyllidae and Hymenoceridae are nested within Pontoniinae. This result is consistent with evidence from larval morphology. The defining characteristics of Gnathophyllidae and Hymenoceridae, a vestigial or missing mandibular incisor process and a broadened third maxilliped, can also be found in Pontoniinae; conversely, on the basis of published species descriptions, gnathophyllids and hymenocerids meet most of the defining characteristics of Pontoniinae. The peculiar form of the third maxilliped in gnathophyllids and hymenocerids might be the result of adaptive evolution, as these particular features are also present in pontoniines. According to our phylogenetic tree, Anchistioididae are more remote from Pontoniinae, which is consistent with the distinct morphological differences in the pleopods. The pontoniine genera analyzed (together with Gnathophyllidae and Hymenoceridae) are divided into two clades. The members of Clade I exhibit primordial characteristics similar to those of the Palaemoninae, and might be direct descendants of the ancestor of the Pontoniinae; members of Clade II are more specialized.

  16. Calyptraeotheres sp. nov. (Crustacea: Decapoda: Pinnotheridae), symbiont of the slipper shell Crepidula striolata Menke, 1851 (Mollusca: Gastropoda: Calyptraeidae) from the Gulf of California, Mexico.

    Science.gov (United States)

    Ayón-Parente, Manuel; Hendrickx, Michel E

    2014-10-07

    Calyptraeotheres camposi sp. nov. is described from the Gulf of California, Mexico. The new species is close to C. granti (Glassell, 1933) and C. pepeluisi Campos & Hernández-Ávila, 2010 from the Mexican Pacific and to C. hernandezi Hernández-Ávila & Campos 2006 from the Western Atlantic. These four species feature a third maxilliped with a 2-segmented endopod palp and the exopod with unsegmented flagellum. Calyptraeotheres camposi sp. nov. differs from C. granti and C. hernandezi by having the eyes visible in dorsal view, the carapace with arcuate anterolateral margins, the dorsal, longitudinal depressions connected with the transversal depression, and the propodus of pereiopod 2 equal or slightly longer than the carpus. From C. pepeluisi it is distinguished by the absence of a transversal depression on the carapace and the longitudinal depressions not connecting, the carpus and propodus of the third maxilliped being sub-trapezoidal and sub-conical, respectively, in lieu of subrectangular, and the inner surface of the fixed finger nude instead of bearing short setae near the cutting edge and ventral margin.

  17. 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.

  18. A new species of the genus Petrolisthes Stimpson (Crustacea, Decapoda, Porcellanidae) from the Central Pacific, with remarks and new records for P. aegyptiacus Werding & Hiller

    Science.gov (United States)

    Hiller, Alexandra; Werding, Bernd

    2016-01-01

    Abstract Petrolisthes paulayi sp. n. is described from specimens collected in French Polynesia. The new species belongs to an assemblage of morphologically similar Indo-West Pacific (IWP) species, here designated as the “mesobranchial-spine group”. All species in the group bear carapace spines, including one or more mesobranchial spines, and transverse, piliferous striations on the dorsal surface of carapace and chelipeds. Petrolisthes paulayi sp. n. is distinguishable from all species in the group by its forwardly produced, trilobate front, and a characteristic combination of carapace spines. We also report on the range extension and live coloration of Petrolisthes aegyptiacus Werding & Hiller, another species of the mesobranchial-spine group, so far considered a Red Sea endemic. Specimens from the Mascaréne Islands confirm that the geographic range of the species extends to the southern Indian Ocean. While specimens morphologically similar to Petrolisthes aegyptiacus, and collected in the Line and Society Islands, suggest a large range extension to the Central Pacific, it is probable that these individuals represent an undescribed species closely related to Petrolisthes aegyptiacus. PMID:27667952

  19. 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...

  20. Characterization of a novel nm23 gene and its potential roles in gametogenesis in the prawn Macrobrachium rosenbergii (de Man, 1879) (Crustacea: Decapoda).

    Science.gov (United States)

    Song, Ya-Nan; Lu, Cui-Yun; Chen, Jie; Qiu, Gao-Feng

    2013-11-15

    Nm23 is a family of genes encoding the nucleoside diphosphate (NDP) kinase, which functions in a wide variety of biological processes, including growth, development, differentiation and tumor metastasis. In this study, a novel nm23 gene, designated as Mrnm23, was identified from the freshwater giant prawn Macrobrachium rosenbergii. The full-length cDNA was 776bp in length, encoding for a protein of 176 amino acids with one typical NDP kinase domain that harbored all the crucial residues for nucleotide binding and enzymatic activity. Like human novel nm23-H1B, the putative protein contained a unique 21-amino-acid NH2-terminal extension as compared to human nm23 (nm23-H1) homologs. Further, 3 extra amino acid residues prolonged the COOH-terminus. The Mrnm23 was ubiquitously expressed in all tissues examined, including androgenic gland, gill, heart, liver, muscle, ovary, and testis. In situ hybridization to gonad sections indicated that the Mrnm23 mRNA was localized in the cytoplasm of cup-base of differentiating spermatids, in the spike of the umbrella-shaped spermatozoa and in the cytoplasm of the early previtellogenic oocytes, suggesting that the Mrnm23 has potential roles in spermiogenesis and early differentiation of oocyte.

  1. 罗氏沼虾脑的形态和结构%The Morphology and Structure of the Brain of the Prawn,Macrobrachium rosenbergii ( Crustacea : Decapoda)

    Institute of Scientific and Technical Information of China (English)

    廖家遗

    2001-01-01

    罗氏沼虾(Macrobrachium rosenbergii)的脑位于两个眼柄基部中的一团海绵状组织内.它由神经根、前脑、中脑、后脑、神经连接和细胞体群组成.它的神经根从脑发出的位置及外伸的方向和已描述过的虾、蟹的脑神经根有一定的区别,未发现有副叶髓质和中脑连接.因此它可能是虾蟹另一种脑的类型.%The brain of the prawn Macrobrachium rosenbergii is located in a mass of spongy tissue within the base of eyestalks. It consists of protocerebrum, deutocerebrum, tritocerebrum, nerve roots, commissures, and clusters of cell bodies. It is different from the described brains of the other prawn and crabs in the site where the nerve roots project from the brain and in the extension directions of the nerve roots. In the brain the accessory lobe, a neuropil, and the deutocerebral commissure could not be identified. The above differences suggest that the brain of Macrobrachium rosenbergii may be a new brain type of the prawns and crabs.

  2. Phylogenetic and transcriptomic analyses reveal the evolution of bioluminescence and light detection in marine deep-sea shrimps of the family Oplophoridae (Crustacea: Decapoda).

    Science.gov (United States)

    Wong, Juliet M; Pérez-Moreno, Jorge L; Chan, Tin-Yam; Frank, Tamara M; Bracken-Grissom, Heather D

    2015-02-01

    Bioluminescence is essential to the survival of many organisms, particularly in the deep sea where light is limited. Shrimp of the family Oplophoridae exhibit a remarkable mechanism of bioluminescence in the form of a secretion used for predatory defense. Three of the ten genera possess an additional mode of bioluminescence in the form of light-emitting organs called photophores. Phylogenetic analyses can be useful for tracing the evolution of bioluminescence, however, the few studies that have attempted to reconcile the relationships within Oplophoridae have generated trees with low-resolution. We present the most comprehensive phylogeny of Oplophoridae to date, with 90% genera coverage using seven genes (mitochondrial and nuclear) across 30 oplophorid species. We use our resulting topology to trace the evolution of bioluminescence within Oplophoridae. Previous studies have suggested that oplophorid visual systems may be tuned to differentiate the separate modes of bioluminescence. While all oplophorid shrimp possess a visual pigment sensitive to blue-green light, only those bearing photophores have an additional pigment sensitive to near-ultraviolet light. We attempt to characterize opsins, visual pigment proteins essential to light detection, in two photophore-bearing species (Systellaspis debilis and Oplophorus gracilirostris) and make inferences regarding their function and evolutionary significance.

  3. Zoological results of the British speleological expedition to Papua new Guinea 1975 : 7. Cavernicolous shrimps (Crustacea Decapoda, Natantia from new Ireland and the Philippines

    NARCIS (Netherlands)

    Holthuis, L.B.

    1978-01-01

    Through the kindness of Dr. P. Beron, National Natural History Museum, Sofia, Bulgaria, I was allowed to study some cavernicolous shrimps collected by him in New Ireland, while he was a member of the 1975 British Speleological Expedition to Papua New Guinea. The material proved to consist of two

  4. Additional records of the pagurid hermit crab genus Trichopagurus de Saint Laurent, 1968 (Crustacea: Decapoda: Anomura), with description of a new species from the Philippines.

    Science.gov (United States)

    Komai, Tomoyuki

    2013-01-01

    The pagurid hermit crab genus Trichopagurus de Saint Laurent, 1968 is currently represented by three shallow water spe- cies from the tropical Indo-West Pacific region. In this paper, three species of the genus, including one new species, are reported. Trichopagurus tenuidactylus n. sp. is described on the basis of a single ovigerous female from the Bohol Sea, the Philippines, and compared with two close relatives, T. asper Komai & Poupin, 2012 and T. macrochela Komai & Os- awa, 2005. New locality records are provided for T. macrochela (the Philippines) and T. trichophthalinus (Forest, 1954) (Taiwan and Marianas). An identification key to the four species of the genus is presented.

  5. Crabs of the families Palicidae and Crossotonotidae (Crustacea, Decapoda, Brachyura, Palicoidea) from the Ogasawara Islands, Japan, with the description of a new species.

    Science.gov (United States)

    Takeda, Masatsune; Tachikawa, Hiroyuki

    2015-01-10

    Four species of palicoid crabs, Neopalicus jukesii (White, 1847) and Rectopalicus ampullatus Castro, 2000 of the family Palicidae, and Crossotonotus spinipes (De Man, 1888) and a new species of Pleurophricus A. Milne-Edwards, 1873 of the family Crossotonotidae, are recorded from the Ogasawara Islands, Japan. Diagnostics for the new species are the protruded bilobed front, six subacute lobate teeth at each lateral margin of the carapace, six rounded lobes at the posterior margin of the carapace, a crested armature of the cheliped carpus, and the strongly depressed ambulatory legs, which readily distinguish it from its two congeners, P. cristatipes A. Milne-Edwards, 1873 known by two males from Australia and the Kai Islands in Indonesia, and P. longirostris (Moosa & Serène, 1981) known by a female from the Sunda Strait, Indonesia.

  6. Two new potamid crabs, Yuexipotamon arcophallus new genus, new species and Minutomon shanweiense new genus, new species, (Crustacea: Decapoda: Brachyura: Potamidae) from southern China.

    Science.gov (United States)

    Huang, Chao; Mao, Si Ying

    2014-02-12

    Two new Chinese genera and species of freshwater crabs, Yuexipotamon arcophallus, new genus, new species, and Minutomon shanweiense, new genus, new species, are described from Zhaoqing City and Shanwei City, respectively. The former is superficially closest to Huananpotamon Dai & Ng, 1994, while the latter resembles Sinopotamon Bott, 1967, and Mediapotamon Dai, 1995. The two new genera, however, possess distinctive combinations of carapace, third maxilliped, male thoracic sternal and first gonopodal characters that easily distinguish them from other genera. Notes on the general biology of the two new species are also given.

  7. 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 Potam

  8. Five new species of freshwater crabs of the genera Ghatiana Pati & Sharma, 2014, and Gubernatoriana Bott, 1970 (Crustacea, Decapoda, Brachyura: Gecarcinucidae Rathbun, 1904) from the Western Ghats, India.

    Science.gov (United States)

    Pati, S K; Thackeray, T; Khaire, A

    2016-02-23

    Five new species of gecarcinucid freshwater crabs, Ghatiana atropurpurea n. sp., Ghatiana splendida n. sp., Gubernatoriana alcocki Pati n. sp., Gubernatoriana thackerayi Pati n. sp., and Gubernatoriana waghi Pati n. sp. are described from the Western Ghats in Maharashtra and Goa states of India. Ghatiana atropurpurea n. sp. can be differentiated from other species of Ghatiana Pati & Sharma, 2014 by the shape and colour of its carapace, and the sigmoid-shaped male first pleopod (G1). Ghatiana splendida n. sp. is separated from its congeners mainly by its long anterolateral margin of the carapace and short terminal article of the G1. Besides, the colour pattern (deep pink carapace and chelipeds, orange ambulatory legs) of G. splendida n. sp. is exceptional among its congeners. Gubernatoriana alcocki n. sp. is unique among species of Gubernatoriana Bott, 1970 due to its inwardly curved tip of the terminal article of the G1. The stout and cone-shaped terminal article of the G1 of G. thackerayi n. sp. is characteristic among its congeners. In addition, G. thackerayi n. sp. has a unique colouration amongst congeners (violet-red carapace and ambulatory legs, orange-red chelipeds). Gubernatoriana waghi n. sp. can be distinguished from its congeners by the quadrate-shaped carapace, narrow frontal margin, pointed tips of the cheliped fingers, short terminal article of the G1 and very short or vestigial terminal article of the male second pleopod (G2). The body colour (burnt orange carapace and ivory coloured chelipeds and ambulatory legs) of G. waghi n. sp. is also important to distinguish live crabs of the genus. Key to the species of Ghatiana and Gubernatoriana is provided.

  9. Two new species of freshwater crabs of the genus Heterochelamon Türkay & Dai, 1997 (Crustacea: Decapoda: Brachyura: Potamidae) from Guangxi Zhuang Autonomous Region, southern China.

    Science.gov (United States)

    Naruse, Tohru; Zhu, Chunchao; Zhou, Xianmin

    2013-01-01

    Heterochelamon tessellatum n. sp. and H. castanea n. sp. are described trom the Guangxi Zhuang Autonomous Region, southern China. Heterochelamon tessellatum n. sp. and H. castanea n. sp. are morphologically most similar to H. yangshuoense Türkay & Dai, 1997, and H. guangxiense Türkay & Dai, 1997, respectively. The new species can be differentiated from these allied species by differences in the shape of external orbital tooth, epibranchial tooth, and male first gonopod. The present study brings the number of Heterochelamon species to five. A key to species of the genus Heterochelamon is provided.

  10. The land crabs of the Discoplax longipes A. Milne-Edwards, 1867 species group, with description of a new species from Guam (Crustacea: Decapoda: Brachyura: Gecarcinidae).

    Science.gov (United States)

    Ng, Peter K L; Shih, Hsi-Te

    2015-06-30

    Specimens of the gecarcinid land crab Discoplax longipes A. Milne-Edwards, 1867, from the western Pacific, can be separated into two distinct groups on the basis of DNA (mitochondrial 16S rDNA and cytochrome oxidase subunit I) and structure of the male first gonopod. On the basis of this data, the material that occurs from the Loyalty Islands to French Polynesia is shown to be D. longipes s. str., whereas specimens from Guam are here referred to a new pseudocryptic species, D. michalis n. sp. The two species are described and figured; and a revised key to the long-legged Discoplax species is provided.

  11. 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.

  12. A NEW SPECIES OF RANINOIDES (CRUSTACEADECAPODA : RANINIDAE) FROM OFF THE SOUTHEASTERN COAST OF HAINAN ISLAND AND NANSHA ISLANDS

    Institute of Scientific and Technical Information of China (English)

    陈惠莲; MichaelTuerkay

    2001-01-01

    Ranlnoides longifions new species, off SE coast of Hainan Island, dorsal surface of carapace with an arched granular edge across carapace between the anterolateral teeth, median frontal tooth longest, second frontal teeth subquadrate.

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

    Science.gov (United States)

    Ďuriš, Zdeněk; Horká, Ivona

    2017-01-01

    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 Periclimenes brevicarpalis. Actinimenesgen. n., is proposed for the anemone-associated Periclimenes inornatus, Periclimenes ornatellus and Periclimenes ornatus, all of which have a subspatulate first pereiopod. Cristimenesgen. n., is designated for the echinoderm-associated species, Periclimenes commensalis, Periclimenes cristimanus, and Periclimenes zanzibaricus, all with a unique carpo-propodal articulation of the second pereiopods. Rapimenesgen. n. is established for the hydroid and antipatharian-associated Periclimenes brucei, Periclimenes granulimanus, and Periclimenes laevimanus, for which the long, slender and unequal second pereiopods and prehensile ambulatory propodi are the main synapomorphic characters.

  14. 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.

  15. Resurrection of Rhynchoplax Stimpson, 1858, with the description of two new species from Japan and Australia (Crustacea: Decapoda: Brachyura: Hymenosomatidae).

    Science.gov (United States)

    Komai, Tomoyuki; Poore, Gary C B

    2016-03-24

    Rhynchoplax Stimpson, 1858, is resurrected from synonymy with Halicarcinus White, 1846. Rhynchoplax hondai Takeda & Miyake, 1971, a species based on an immature female, is rediagnosed and two new species, R. magnetica n. sp. from northeastern Australia and R. minutula n. sp. from the Ryukyu Islands, Japan, are described. They differ from R. hondai in the shape of the rostrum, form of the subhepatic region and the armature of the pereopodal meri. All differ from the type species R. messor Stimpson, 1858, in having a longer and simple rostrum without supraocular pseudorostral spines and the absence of a postocular spine.

  16. 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.

  17. 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.

  18. Deep-sea shrimps of the genus Bythocaris G.O. Sars in the collections of Russian museums, with the description of a new species (Crustacea: Decapoda: Hippolytidae)

    NARCIS (Netherlands)

    Sokolov, V.

    2000-01-01

    The collections of Bythocaris in Russian museums and research institutes were studied. Three species, B. biruli Kobjakova, 1964, B. curvirostris Kobjakova, 1957 and B. irene Retovsky, 1946, are redescribed, and a new species, B. kobjakovae spec. nov. is described. The intra-specific variation of six

  19. Species composition and abundance of the benthic community of Axiidea and Gebiidea (Crustacea: Decapoda in the Marapanim Bay, Amazon estuary, northern Brazil

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    Dalila Costa Silva

    2012-04-01

    Full Text Available The thalassinideans (Axiidea and Gebiidea encompasses approximately 615 species with reclusive habits, generally confined to extensive galleries burrowed into the sand or mud and, more rarely, in openings in reefs or the cavities of sessile animals such as sponges and coral. These species use the galleries for shelter, feeding and breeding, except during the pelagic larval stage. They inhabit estuaries, bays, lagoons, beaches, seas and both tropical and temperate oceanic areas throughout the world, distributed predominantly in the intertidal zone (mid-littoral and infralittoral zones. The aim of the present study was to assess the species composition and abundance of thalassinideans, comparing two micro-habitats (consolidated and non-consolidated substrates, and determine whether there is a correlation between abundance of the organisms and time of the year, collection sites or salinity. Twelve monthly samplings were carried out between August 2006 and July 2007 over consolidated and non-consolidated bottoms of the upper and lower portions of the mid-littoral zones, with three sub-samplings, totaling 48 monthly samples and 576 in all. A total of 651 individuals were collected - 114 Lepidophthalmus siriboia Felder & Rodrigues, 1993 and 537 Upogebia vasquezi Ngoc-Ho, 1989. There was correlation between the abundance of both species and salinity, but U. vasquezi was more abundant in the rainy season. Lepidophthalmus siriboia appears to prefer non-consolidated substrates, whereas U. vasquezi prefers consolidated substrates. The recruitment period for the callianassid L. siriboia appears to occur in just two periods of the year and is more intense in the dry season, whereas U. vasquezi is more frequent throughout the year. The smallest and largest sizes (carapace length - CL recorded for L. siriboia were smaller than those recorded for the species in northeastern region of Brazil. CL values for ovigerous females suggest that U. vasquezi reaches sexual maturity at a smaller size than L. siriboia.

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

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    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.

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

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    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.

  2. 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.

  3. 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.

  4. Fine structure of the spermatozoon in three species of Cambaridae (Arthropoda: Crustacea: Decapoda Cambarus robustus, Orconectes propinquus and Orconectes rusticus: a comparative biometrical study

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    Buket Yazicioglu

    2016-08-01

    Full Text Available The ultrastructure of spermatozoa in three species of cambarid crayfish, Cambarus robustus, Orconectes propinquus, and Orconectes rusticus, were studied and compared with eight previously studied species from different crayfish families using morphological features and biometrical data. The ultrastructure of spermatozoa show a generally conserved pattern including an acrosome and nucleus in the anterior and posterior parts of the cell, respectively, radial arms that wrap around the nucleus, and the whole cell is enclosed by an extracellular capsule. The most outstanding morphological feature in spermatozoa of three studied cambarid crayfish is the crest-like protrusions in the anterior part of the acrosome that can be used as one of the features for distinguishing the members of this family. Results of biometrical data reveal that acrosome size in the representatives of Parastacidae are the smallest, while representatives of Astacidae show the biggest acrosome. The acrosome size in species belonging to Cambaridae occupy an intermediate position between the two other families of freshwater crayfish. In conclusion, a combination of morphological features and biometrical data of spermatozoa can help distinguishing different species of the freshwater crayfish.

  5. Effects of the invasive macroalga Lophocladia lallemandii on the diet and trophism of Pinna nobilis (Mollusca: Bivalvia and its guests Pontonia pinnophylax and Nepinnotheres pinnotheres (Crustacea: Decapoda

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    Miguel Cabanellas-Reboredo

    2010-03-01

    Full Text Available Pinna nobilis and its guests Pontonia pinnophylax and Nepinnotheres pinnotheres were sampled from Posidonia oceanica meadows invaded and non-invaded by the red alga Lophocladia lallemandii. Understanding the interactions among native and invasive species was the primary aim. Therefore, the effects of the invasive L. lallemandii on the percentage contribution of the food sources of P. nobilis and its guests and their trophic associations were investigated by applying mixing models to the δ13C and δ15N stable isotopes. Isotopic analyses revealed that the guests of P. nobilis occupied a higher trophic level than their host due to their capacity for food selection. The invasion of L. lallemandii altered the percentage contribution of the food sources to the consumers’ diet. Whereas the percentage contribution of the food sources to the δ13C signatures did not really change, L. lallemandii produced variations in the percentage contribution to the δ15N signatures. This red macroalga represented one of the main food sources for P. nobilis, with a real contribution of 19.4% in the invaded meadows. Moreover, L. lallemandii slightly decreased the trophic level of the consumers. This study provides the first isotopic and trophic data for the pea crab N. pinnotheres.

  6. Cherax snowden, a new species of crayfish (Crustacea, Decapoda, Parastacidae) from the Kepala Burung (Vogelkop) Peninsula in Irian Jaya (West Papua), Indonesia.

    Science.gov (United States)

    Lukhaup, Christian; Panteleit, Jörn; Schrimpf, Anne

    2015-01-01

    A new species, Cherax snowden sp. n., from the Oinsok River Drainage, Sawiat District in the central part of the Kepala Burung (Vogelkop) Peninsula, West Papua, Indonesia, is described, figured and compared with the closest related species, Cherax holthuisi Lukhaup & Pekny, 2006. This species is collected and exported for ornamental purposes and its commercial name in the pet trade is "orange tip" or "green orange tip". Both species may be easily distinguished morphologically or by using sequence divergence, which is substantial, for considering Cherax snowden sp. n. to be a new species.

  7. A Histological Study of Ovarian Development in the Giant Red Shrimp Aristaeomorpha foliacea (Crustacea: Decapoda: Aristeidae from the Southern Tyrrhenian Sea (Western Mediterranean

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    Anna Perdichizzi

    2012-01-01

    Full Text Available The reproductive features of the giant red shrimp, Aristaeomorpha foliacea, were investigated in the southern Tyrrhenian sea by experimental trawl sampling. The annual length-frequency distribution showed a multimodal trend in females, ranging between 16 and 67 mm carapace length (CL, and a unimodal trend in males (18–45 mm CL. Mature males occurred in different proportions all year round, while females displayed seasonal maturity (June—September, with a peak in July. Six oocyte developmental stages were identified, the most advanced of which (Pv, postvitellogenic had never been described before in this species. Ovary development followed a group-synchronous pattern, with the yolked oocyte stock clearly separated from the reservoir of unyolked oocytes, suggesting that A. foliacea is a total spawner, with determinate fecundity. Based upon histological findings, a revision of macroscopic maturity staging employed in Mediterranean bottom trawl surveys (MEDITS is proposed.

  8. 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 electr...

  9. 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

  10. A case of associated occurrence of the crab Lauridromia inter-media (Laurie, 1906) (Crustacea: Decapoda: Dromiidae) and the actinian Nemanthus annamensis Carlgren, 1943 (Anthozoa: Actiniaria: Nemanthidae)

    NARCIS (Netherlands)

    Lavaleye, M.S.S.; Hartog, den J.C.

    1995-01-01

    Members of the crab family Dromiidae tend to cover their carapace mostly with sponges or colonial tunicates. More rarely are used other objects or organisms such as solitary Tunicata, Zoantharia (= encrusting anemones), valves of Bivalvia, etc.; a review of these is presented. A new association of a

  11. 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?

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    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.

  12. Report on Pontoniinae shrimps (Crustacea: Decapoda) collected by Joint Chinese German Marine Biology Expeditions to Hainan Island, South China Sea Ⅱ.Harpiliopsis, Ischnopontonia, Jocaste, Palaemonella, Periclimenaeus, Periclimenella

    Institute of Scientific and Technical Information of China (English)

    李新正; 刘瑞玉

    2003-01-01

    The present paper reports 9 species of pontoniine shrimps collected from Hainan Island, South China Sea, by the Joint Chinese German Marine Biology Expeditions, in which, Periclimenaeus arabicus (Calman, 1939) and Periclimenaeus hecate (Nobili, 1904) are recorded for the first time from Hainan Island.

  13. Names and publication dates of the Brachyura in F.É. Guérin (Guérin-Méneville) (Crustacea: Decapoda).

    Science.gov (United States)

    Low, Martyn E Y; Ng, Peter K L; Evenhuis, Neal L

    2013-11-12

    The names and dates of the publications of Brachyura of Guérin (Guérin-Méneville from 1836) are reviewed, and previously unidentified or overlooked names are identified. Several identical new names used in multiple publications by Guérin (also under the name Guérin-Méneville), and others that appeared in the same year necessitated the accurate determination of publication dates to establish priority. The authorships of three names should be credited to Guérin (1832): Gecarcinus lateralis (Gecarcinidae), Halimus aries (Majidae), and Libinia spinosa (Epialtidae), the first previously attributed to Fréminville (1835), the last two to H. Milne Edwards (1834). The overlooked genus- and species-group names Cyclocarcinus pinnotheroides Guérin-Méneville, 1838, are determined to be senior subjective synonyms of the genus- and species-group names Hapalonotus reticulatus (De Man, 1879) (Pilumnidae). Applying Article 23.9.1 of the International Code of Zoological Nomenclature, precedence is reversed between the genus-group names and the correct name is Hapalonotus pinnotheroides (Guérin-Méneville, 1838). Current and widespread use of the genus-group name Thalamita Latreille, 1829 (31 March) (Portunidae) is threatened by the overlooked Thalamites Guérin, 1829 (21 March), and the precedence of the names is also reversed to maintain usage of the former. The genus-group name Eurypodius Guérin (Inachidae) is shown to have been established in 1828, not 1825. Included is a complete bibliography of the publications in which Guérin (also under Guérin-Méneville) established new names for Brachyura, with their accurate publication dates.

  14. 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

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    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.

  15. 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

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    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.

  16. 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,

  17. Reports on the impact of Caulerpa lentillifera by alien free-living isopod Paracerceis sculpta (Crustacea, Isopoda, Sphaeromatidae)

    National Research Council Canada - National Science Library

    太田, 悠造

    2014-01-01

    Unidentified free-living isopods (Crustacea, Sphaeromatidae) occurring in an important commercial seaweed bed of Caulerpa lentillifera at Miyako-jima island, southern Japan, are identified herein Paracerceis sculpta (Holmes, 1904...

  18. 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.

  19. 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 cora

  20. 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....

  1. Hyloniscus riparius: een lang onopgemerkte landpissebed in Nederland (Crustacea, Isopoda: Trichoniscidae)?

    NARCIS (Netherlands)

    Wijnhoven, H.

    1993-01-01

    Hyloniscus riparius: an unnoticed terrestrial wood-louse in the Netherlands (Crustacea, Isopoda: Trichoniscidae) ? Until recently Hyloniscus riparius was only recorded from The Netherlands from green-houses in the Botanical Garden at Utrecht. More recently material was collected in the Ooy Polder. I

  2. Porcellium conspersum, een in Nederland zeer zeldzame landpissebed van vochtige bossen (Crustacea: Isopoda: Oniscoidea)

    NARCIS (Netherlands)

    Soesbergen, M.

    1999-01-01

    The influence of recent inundations on the distribution pattern of the isopod Eluma purpurascens in the province of Zeeland (Crustacea: Isopoda: Oniscoidea) Small scale mapping of Eluma purpurascens Budde-Lund, 1885 in the province of Zeeland revealed a remarkable distribution pattern. The species p

  3. Mysidacea (Crustacea) from the Minicoy lagoon (Lakshadweep, India) with description of a new species of Anisomysis

    Digital Repository Service at National Institute of Oceanography (India)

    Biju, A.; Panampunnayil, S.U.; Prabhakaran, M.P.

    .M.Garret, U.S.N. commanding, 27. Memoirs of the Museum of Comparative Zo?logy, Harvard College. 35: 175-296. Murano M. 1994. Anisomysis (Paranisomysis) ohtsukai (Crustacea, Mysidacea), a new mysid from Japan. Bulletin of National Science Museum, Tokyo 20...

  4. Immunocytochemical studies on the naupliar nervous system of Balanus improvisus (Crustacea, Cirripedia, Thecostraca)

    DEFF Research Database (Denmark)

    Semmler, Henrike; Wanninger, Andreas; Høeg, Jens T;

    2008-01-01

    neurons in the protocerebrum, along the circumoesophageal connectives and in the mandibular ganglion stain only for serotonin. Due to the almost complete absence of comparable data on the neuroanatomy of early (naupliar) stages in other Crustacea, we include immunocytochemical data on the larvae...

  5. Remarkable convergent evolution in specialized parasitic Thecostraca (Crustacea

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    Crandall Keith A

    2009-04-01

    Full Text Available Abstract Background The Thecostraca are arguably the most morphologically and biologically variable group within the Crustacea, including both suspension feeders (Cirripedia: Thoracica and Acrothoracica and parasitic forms (Cirripedia: Rhizocephala, Ascothoracida and Facetotecta. Similarities between 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 (2,402, Histone H3 (328] and 41 larval characters in seven facetotectans, five ascothoracidans, three acrothoracicans, 25 rhizocephalans and 39 thoracicans (ingroup and 12 Malacostraca and 10 Copepoda (outgroup. Maximum parsimony, maximum likelihood and Bayesian analyses showed the Facetotecta, Ascothoracida and Cirripedia each as monophyletic. The better resolved and highly supported DNA maximum likelihood and morphological-DNA Bayesian analysis trees depicted the main phylogenetic relationships within the Thecostraca as (Facetotecta, (Ascothoracida, (Acrothoracica, (Rhizocephala, Thoracica. Conclusion Our 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 the Rhizocephala and strongly indicated for the Facetotecta had no common origin. Future analyses are needed to determine whether the most recent common ancestor of the Thecostraca was free-living or some primitive form of ectoparasite.

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

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    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

  7. Biologia do caranguejo-uçá, Ucides cordatus (Crustacea: Decapoda: Brachyura, na Baía da Babitonga, Santa Catarina, Brasil Biology of the mangrove uçá crab, Ucides cordatus (Crustacea: Decapoda: Brachyura, in Babitonga Bay, Santa Catarina, Brazil

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    Alison C. Wunderlich

    2008-06-01

    Full Text Available O objetivo deste estudo é caracterizar pela primeira vez alguns aspectos da reprodução do caranguejo-uçá em manguezais da Baía da Babitonga (Santa Catarina. Além disso, a densidade e o tamanho do estoque deste recurso pesqueiro foram também estimados. Os exemplares foram coletados mensalmente, de maio de 2002 a abril de 2003, em duas áreas distintas: Iperoba e Palmital; um total de 2265 espécimes (1623 machos e 642 fêmeas foi analisado. Os machos com gônadas maturas foram registrados durante todo o ano, enquanto as fêmeas com gônadas maturas ocorreram em apenas cinco meses. As fêmeas ovígeras foram registradas apenas em dezembro e janeiro. O etograma do fenômeno de migração reprodutiva ("andada" esteve em concordância com a maior atividade de caranguejos associada às luas cheias e novas, com maior intensidade em dezembro e janeiro, relacionados ao verão austral. A densidade total no Manguezal de Iperoba foi de 2,05 ± 0,97 ind./m², não diferindo significativamente daquela registrada para o Manguezal do Palmital (2,06 ± 1,08 ind./m² (p The aim of this work is to characterize, for the first time, aspects of the reproduction of the mandrove-land crab in mangroves of the Babitonga Bay (Santa Catarina. Furthermore, density and stock size of this fishery resource were also estimated. The specimens were sampled from May 2002 to April 2003, from two distinct locations: Iperoba and Palmital; a total of 2265 specimens (1623 males and 642 females were analyzed. Males with mature gonads were recorded throughout the year, while females with mature gonads were only recorded during a five-month period. Ovigerous females were recorded in December and January. The ethogram of the reproductive migration phenomenon ("andada" is in agreement of high crab activity associated to full- and new-moon, with higher intensity during December and January, also related to the austral summer season. The total sampling density on Iperoba Mangrove was 2.05 ± 0.97 individuals.m-2 and did not differ significantly (p < 0.05 from the density recorded on Palmital Mangrove (2.06 ± 1.08 individuals.m-2. The overall average of density estimation at Babitonga Bay was 2.05 ± 1.00 individuals.m-2, which corresponded to the density of open (1.42 ± 0.89 individuals.m-2 and closed burrows (0.64 ± 0.63 individuals.m-2.

  8. 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

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    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

  9. Estrutura populacional dos camarões simpátricos Potimirim glabra e Potimirim potimirim (Crustacea, Decapoda, Atyidae no rio Sahy, Rio de Janeiro, Brasil Populational structure of the sympatric freshwater shrimps Potimirim glabra and Potimirim potimirim (Crustacea, Decapoda, Atyidae in the Sahy River, Rio de Janeiro, Brazil

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    Giovana V. Lima

    2006-03-01

    Full Text Available Este trabalho teve por objetivo obter conhecimento sobre a estrutura populacional de dois camarões de água doce simpátricos, Potimirim glabra (Kingsley, 1878 e Potimirim potimirim (Müller, 1881 no rio Sahy, Mangaratiba, Rio de Janeiro, Brasil. Os indivíduos foram coletados mensalmente durante o período de setembro de 1997 a fevereiro de 1999 utilizando-se peneiras, que foram passadas sob a vegetação marginal, superfície de rochas e pequenas poças d'água, num esforço de 15 minutos por coletor. Os animais foram separados quanto ao sexo e mensurados em relação ao comprimento total e do cefalotórax. Um total de 4.889 indivíduos foram coletados no rio Sahy: 3.281 P. glabra e 1.608 P. potimirim. A razão sexual observada foi de 1:1 para P. glabra e 1:2,3 para P. potimirim. Em ambas populações, cinco estágios de maturidade sexual foram determinados, sendo as populações constituídas principalmente por camarões adultos. O recrutamento de juvenis apresentou diferenças em ambas as espécies. O recrutamento de P. glabra ocorreu durante todo o período de estudo, exceto na primavera, enquanto que P. potimirim foi registrado somente no outono. A distribuição sazonal de fêmeas ovígeras de P. glabra é similar ao de P. potimirim, com reprodução na primavera e no verão.The aim of this work was to get some knowledge about the populational structure of the two sympatric freshwater shrimp species, Potimirim glabra (Kingsley, 1878 and Potimirim potimirim (Müller, 1881 in the Sahy River, Mangaratiba, Rio de Janeiro, Brazil. The specimens were sampled monthly from September 1997 to February 1999 by sieving the marginal vegetation, on rocky surface and among litter on river bottom, with 15-minute effort per sampling period. The animals were sorted sexed and their total and cephalothoracic length were measured. A total of 4,889 individuals were collected in Sahy river: 3,281 P. glabra and 1,608 P. potimirim. The sex ratio for all collected individuals was 1:1 for P. glabra and 1:2.3 for P. potimirim. In both populations, five sexual maturity stages were determined and the populations were constituted mainly of adult freshwater shrimps. This study shows the difference between the recruitment of juveniles along these species. The recruitment for P. glabra occurs throughout the year, except in Spring, while P. potimirim was recorded only in Autumn. The seasonal distribution of ovigerous females of P. glabra is similar to P. potimirim, with reproduction on Spring and Summer.

  10. Aspectos reprodutivos do camarão de água doce Macrobrachium potiuna (Müller (Crustacea, Decapoda, Palaemonidae na Serra do Piloto, Mangaratiba, Rio de Janeiro, Brasil Reproductive aspects of freshwater shrimp Macrobrachium potiuna (Müller (Crustacea, Decapoda, Palaemonidade in Serra do Piloto, Mangaratiba, Rio de Janeiro, Brazil

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    Luciana dos Santos Antunes

    2004-06-01

    Full Text Available Exemplares de Macrobrachium potiuna (Müller, 1880 foram coletados mensalmente de julho/2001 a junho/2002. No laboratório os camarões foram separados por sexo e mensurados. Fêmeas ovígeras foram separadas e seus ovos contados e mensurados. Foram capturados um total de 1162 indivíduos, dos quais 50% eram fêmeas, 47% machos e 3% juvenis. O período reprodutivo ocorreu durante a primavera-verão. Fêmeas ovígeras apresentaram comprimento total variando de 25,9 a 40,3 mm. A fecundidade média foi de 24,0 ± 9,0 ovos. A primeira maturação sexual ocorreu aos 25,9 mm de comprimento total. As dimensões médias dos ovos foram iguais a 1,56 e 2,08 mm para os eixos menor e maior, respectivamente, durante o estágio inicial de desenvolvimento embrionário e 1,70 e 2,46 mm, respectivamente, para os eixos menor e maior durante o estágio final de desenvolvimento.Samples of Macrobrachium potiuna (Müller, 1880 were collected monthly from July/2001 to June/2002. At the laboratory, shrimps were separated by sex and measured. The ovigerous females were separated and theirs eggs measured and counted. A total of 1162 shrimps were collected, 50% was females, 47% was males and 3% juveniles. The reproductive period occurred during the spring-summer. The ovigerous female showed total length from 25.9 to 40.3 mm. The mean fecundity was 24,0 ± 9,0 eggs. The first sexual maturation occurred at 25.9 mm total length. The eggs showed means dimensions from 1.56 and 2.08 mm, respectively, for the short and the long axis during the initial stage of development and from 1.70 and 1.89 mm, respectively, for the short and long axis during the final stage of development.

  11. Distribuição de densidade e estrutura populacional de Pilumnus dasypodus Kingsley (Crustacea, Decapoda, Xanthidae na Ilha do Farol, Matinhos, Paraná, Brasil Density distribution and population structure of Pilumnus dasypodus Kingsley (Crustacea, Decapoda, Xanthidae from Farol Isle, Matinhos, Paraná, Brazil

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    Cláudia Regina Bosa

    2000-12-01

    Full Text Available A study of the population of the xanthid crab Pilumnus dasypodus Kingsley, 1879 from rocky shore at the Farol Isle (25º51'S and 48º32'W was carried out in the following aspects: temporal and spatial distributions of density, annual fluctuation of the sex ratio, size composition of the population and reproductive activities of the species. Monthly, four leveis in relation to emmersion time within intertidal zone were sampled, from May/90 to April/91, but Pilumnus dasypodus was obtained only in the levels 2, 3 and 4. The surface water temperature ranged from 16.0ºC (July/90 to 28.0ºC (February/91. A total of 775 individuais of Pilumnus dasypodus were collected among which, 92 were ovigerous females. The population density ranged from 14.63 ind.m-3 (February/91 to 148.00 ind.m-3 (March/91. Higher densities were observed in the level 4, a local of permanent submersion. The sex ratio was 1:1 in almost all months. The carapace width varied from 1.01 to 8.28 mm for males, from 1.01 to 7.18 mm for females and 0.01 to 1.00 mm for juveniles. The fecundity ranged from 81 to 1834 eggs per female. The species has continuous reproduction with two peaks of recruiting in the year. There was a positive relationship, with weak correlation rate, between the carapace width of the ovigerous females and the number of eggs in the abdomen. The rocky shore at Farol Isle is a complex environment which harbor the decapod Pilumnus dasypodus, for breeding and surviving.

  12. 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

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    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.

  13. 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

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    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

  14. Pautas de comportamiento alimentario y adaptaciones progresivas en los apéndices auxiliares en Agostocaris bozanici y Barbouria yanezi (Crustacea: Decapoda: Caridea: Agostocarididae, Hyppolitidae Norms of feeding behavior and progressive adaptations in auxiliary appendages in Agostocaris bozanici and Barbouria yanezi (Crustacea: Decapoda: Caridea: Agostocarididae, Hyppolitidae

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    Luis M. Mejía-Ortíz

    2010-10-01

    Full Text Available Existen varias características que evidencian las adaptaciones a la vida cavernícola en los crustáceos; las principales son: pérdida de visión, carencia de pigmentación, especialización de estructuras sensoriales y elongación de los apéndices ambulatorios. En consideración a que en la literatura se ha registrado la escasez del alimento como una fuerza evolutiva y que en las cuevas anquihalinas la principal fuente de energía se produce de la acción bacteriana, se realizó un análisis con ayuda de microfotografías para identificar las adaptaciones en los apéndices que los crustáceos de estos ambientes utilizan para comer, pereiópodos quelados y maxilípedos, considerando aquellas especies que viven exclusivamente en áreas con altos niveles de H2S de estos sistemas. Los resultados muestran que Agostocaris bozanici tiene más setas sobre el propodio del tercer maxilípedo mientras que Barbouria yanezi las tiene más fuertes en este apéndice. Pero en el margen interno de los quelípedos de A. bozanici existe una especialización muy particular, ya que muestra una serie de setas largas que posiblemente las usa como una herramienta para separar los microorganismos, quizás ciliados, del sedimento. Se concluye que Barbouria yanezi se alimenta de partículas grandes del material en degradación de la selva tropical circundante, mientras que Agostocaris bozanici tiene una seta desarrollada para comer microorganismos que actúan en la descomposición de este material.There are several adaptations shown by crustaceans to cave life; namely: vision loss, lack of pigmentation, specialization of sensory structures and elongation of ambulatory appendages. Since it has been mentioned in the literature that food scarcity is the evolutionary force and that in anchialine caves the main energy source is produced by bacteria, an scanning electron microscopy analysis was conducted to identify the adaptations in the appendages that these crustaceans use for feeding, chelate pereopods and maxillipeds, considering those species that live exclusively in zones that have high levels of H2S. The results show that Agostocaris bozanici has more setae on the propodus of the third maxilliped whilst Barbouria yanezi has stronger setae in this appendage. But along the inner margin of the chelipeds of A. bozanici is an interesting specialization with a series of long setae possibly used as a tool to separate microorganisms, maybe ciliates, from the sediment. The conclusions are that Barbouria yanezi eats large particulate material in degradation coming from the nearby tropical forest, while Agostocaris bozanici has a specialized seta to eat the microorganisms that decompose this material.

  15. 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

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    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.

  16. 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

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    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.

  17. 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

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    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.

  18. Seasonal variations in the intermediate metabolism of the crayfish Parastacus brasiliensis (Crustacea, Decapoda, Parastacidae in the natural environment and experimental culture Variações sazonais do metabolismo intermediário do lagostim Parastacus brasiliensis (Crustacea, Decapoda, Parastacidae no seu ambiente natural e em cultura experimental

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    Bibiana K. Dutra

    2008-09-01

    Full Text Available The goal of this study was to evaluate the effects of seasonal variations on energy metabolism in different tissues of the freshwater crayfish Parastacus brasiliensis (von Martens, 1869. Crayfish were collected monthly from January 2001 to January 2003 in São Francisco de Paula, Rio Grande do Sul, Brazil, in a stream and in a culture tank. Haemolymph samples were collected from each crayfish in the field with a syringe, by puncturing the membrane at the base of the chelipeds. Hepatopancreas, gills, and abdominal muscle were removed for determination of free glucose, glycogen, total lipids, and triglycerides. The haemolymph samples were used for determination of glucose, total proteins, total lipids, and triglycerides. Statistical analysis revealed significant differences in biochemical composition in crayfish collected in the stream compared to the experimental tank during the year, principally in glucose and triglycerides in haemolymph, glycogen and total lipids in all tissues study, and triglycerides only in abdominal muscle. The regular food intake partially modified these seasonal variations of the metabolic pattern. Environmental conditions (e.g., food availability and water temperature and reproductive period appeared to be the main factors influencing the seasonal patterns of variation in energy metabolism.O objetivo deste estudo foi avaliar o efeito das variações sazonais no metabolismo energético em diferentes tecidos do lagostim de água-doce Parastacus brasiliensis (von Martens, 1869. Os lagostins foram coletados mensalmente de Janeiro de 2001 a Janeiro de 2003 em São Francisco de Paula, Rio Grande do Sul, Brasil, no riacho e no tanque de cultivo. Amostras de hemolinfa foram coletadas de cada lagostim em campo com seringa, por punção na membrana da base dos quelípodos. Hepatopâncreas, brânquias e músculo abdominal foram removidos para a determinação dos níveis de glicose livre, de glicogênio, de lipídios totais e de triglicerídeos. As amostras de hemolinfa foram utilizadas para a determinação dos níveis de glicose, de proteínas totais, de lipídios totais e de triglicerídeos. As análises estatísticas revelaram uma variação significativa na composição bioquímica dos lagostins coletados no riacho quando comparados com os do cultivo experimental durante o ano, principalmente da glicose e dos triglicerídeos na hemolinfa, glicogênio e lipídios totais em todos os tecidos estudados, e dos triglicerídeos somente no músculo abdominal. O aporte regular de alimento modificou parcialmente estas variações sazonais do padrão metabólico. As condições ambientais (ex.; disponibilidade de alimento e a temperatura da água e o período reprodutivo parecem ser os principais fatores a influenciar os padrões sazonais da variação do metabolismo energético.

  19. 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

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    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.

  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

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    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. Acesso ao alimento artificial e enchimento do trato digestivo de juvenis do camarão marinho Litopenaeus vannamei (Boone (Crustacea, Decapoda, Penaeidae durante as fases clara e escura do período de 24 horas Artificial food access and digestive tract filling of juvenil marine shrimp Litopenaeus vannamei (Boone (Crustacea, Decapoda, Penaeidae during light and dark phases in 24-hour period

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    Cibele S. Pontes

    2005-12-01

    Full Text Available A escassez de dados acerca do comportamento alimentar do camarão marinho Litopenaeus vannamei (Boone, 1931 com relação ao alimento artificial ofertado em bandejas poderá induzir a uma alimentação inadequada, resultando no desperdício da ração, no aporte desnecessário de nutrientes, e conseqüente aumento dos custos com a alimentação e da poluição ambiental potencial desta atividade. Objetivando fornecer subsídios para a melhoria do manejo alimentar praticado nas fazendas, foram realizados estudos comportamentais utilizando 64 juvenis de Litopenaeus vannamei (7,57 ± 1,01g, mantidos em densidade populacional de 33 m², submetidos a fotoperíodo artificial, em ciclo invertido, para observação durante as fases clara e escura. A ração foi ofertada em intervalos pré-estabelecidos, registrando-se posteriormente através de método focal contínuo: a latência para chegada à bandeja, b latência para consumo do alimento e c Índice de Enchimento do Trato Digestivo. Os animais foram mais rápidos para chegar à bandeja e também para iniciar o consumo do alimento nos horários da fase clara. O enchimento do trato digestivo mostrou-se superior na meia hora subsequente à oferta do alimento, especialmente nos horários da fase clara.The few data on the marine shrimp Litopenaeus vannamei (Boone, 1931 behavior related to feed offer in trays can result inadequate feeding by the animal, feed wastage and unnecessary nutrient input, increasing feed costs and potential environmental pollution of that culture. In order to provide tools for improved feed management methods in shrimp farms, a behavioral study was conducted, using 64 Litopenaeus vannamei juveniles (7,57 ± 1,01g, one animal per 33 m². They were submitted to artificial photoperiods, half of them in reversed cycle, in order to register behavior during light and dark phases. The following variables were registered (continuous sampling after feed exposition: a latency to access the feeding tray, b latency to start eating and c digestive tract filling. The animals accessed the feeding trays and started consumption faster in the light phase hours. The digestive tract filling was higher half hour following feed offer, specially in the hours during the light phase.

  2. Comportamento de Litopenaeus vannamei (Boone (Crustacea, Decapoda, Penaeidae em função da oferta do alimento artificial nas fases clara e escura do período de 24 horas Behavior of Litopenaeus vannamei (Boone (Crustacea, Decapoda, Penaeidae in relation to artificial food offer along light and dark phases in a 24 h period

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    Cibele S. Pontes

    2005-09-01

    Full Text Available A escassez de dados acerca do comportamento do camarão marinho Litopenaeus vannamei (Boone, 1931 relacionado ao alimento artificial ofertado em comedouros poderá induzir a uma alimentação inadequada, aumentando a relação custo/benefício e os impactos ambientais potenciais do seu cultivo. Objetivando fornecer subsídios para a melhoria do manejo alimentar praticado nas fazendas, foram desenvolvidos estudos comportamentais utilizando 64 juvenis de L. vannamei (7,57 ± 1,01 g, submetidos a fotoperíodo artificial, metade deles em ciclo invertido, para observação das suas atividades durante as fases clara e escura. A ração foi oferecida em intervalos pré-estabelecidos, registrando-se antes e depois da oferta: exploração, natação, alimentação e inatividade (focal instantâneo. A natação ocorreu preferencialmente durante a fase escura. A alimentação foi mais elevada na primeira meia hora posterior à oferta, com ênfase nos horários da fase clara. O alimento artificial atuou, em ambas as fases, como um indutor da exploração do substrato, tornando os camarões mais ativos em todos os horários posteriores à sua oferta.The few data on the marine shrimp Litopenaeus vannamei (Boone, 1931 behavior related to artificial food offer in feeding trays may result an inadequate feeding by the animal, increasing the cost/benefit relation in shrimp culture and its potential environmental impact. In order to provide tools for optimizing feeding management in shrimp farms, a behavioral study was developed, using 64 L. vannamei juveniles (7,57 ± 1,01 g. They were submitted to artificial photoperiods, half of them in reversed cycle, in order to register their behavior during light and dark phases. In established intervals, the following activities were registered before and after food exposition: exploration, swimming, feeding and inactivity (instantaneous sampling. Swimming occurred mostly during the dark phase. Feeding time was higher in the half hour following food offer, especially during light phase. Food offering worked out in both phases as an inductor of substrate exploration, making the shrimp more active in all the intervals following its introduction.

  3. 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

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    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.

  4. Dinâmica espacial e temporal de zoeas de Brachyura (Crustacea, Decapoda no estuário do Rio Jaguaribe, Itamaracá, Pernambuco, Brasil Spatial and temporal dynamics of Brachyura zoeae (Crustacea, Decapoda in the Jaguaribe river estuary, Itamaracá, Pernambuco, Brazil

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    Elisabeth C. Silva-Falcão

    2007-12-01

    Full Text Available Um estudo da distribuição fotoperiódica e sazonal das zoeas de Brachyura foi realizado no estuário do Rio Jaguaribe, Pernambuco, Brasil. Amostras de plâncton foram obtidas bimestralmente, durante o ano de 2001, em diferentes marés e nos períodos noturno e diurno em duas estações de coleta. Foram identificados 14 táxons, onde a família Ocypodidae, representada pelas larvas de Ucides cordatus (Linnaeus, 1763 e Uca spp., foi a mais abundante, seguida de Xanthidae e Grapsidae. Na estação próxima à foz, os táxons estiveram bem distribuídos, além de ter apresentado um maior número de famílias identificadas. As larvas de Ocypodidae, Grapsidae e Morfotipo B indicaram um movimento de dispersão para áreas costeiras, enquanto que os Pinnotheridae indicaram uma provável retenção nas águas do estuário. A elevada ocorrência de zoeas no primeiro estágio larval reforça o importante papel dos estuários como berçários para diversas espécies de crustáceos.A survey regarding the diel and seasonal distribution of brachyuran zoea was accomplished in the Jaguaribe estuary, state of Pernambuco, Brazil. Plankton samples were obtained bimonthly, throughout the year of 2001, in different tides and during day and night periods, at two sampling stations. Fourteen taxa were identified, among which Ocypodidae, represented by Ucides cordatus (Linnaeus, 1763 and Uca spp. zoea, was the most abundant one, followed by Xanthidae and Grapsidae. In the station close to the estuary opening, the taxa were well distributed, besides presenting a larger number of identified families. Ocypodidae, Grapsidae and Morphotype B zoea indicated a dispersion movement into coastal areas, while Pinnotheridae indicated a probable retention within the estuarine waters. The high occurrence of zoea in the first larval stages reinforces the important role of estuaries as nursery grounds for several crustacean species.

  5. Recent advances in the biology of the Neotropical freshwater crab family Pseudothelphusidae (Crustacea, Decapoda, Brachyura Avanços recentes no estudo da biologia dos caranguejos de água doce neotropicais da família Pseudothelphusidae (Crustacea, Decapoda, Brachyura

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    Gilberto Rodríguez

    2005-06-01

    Full Text Available Pseudothelphusidae is a well diversified group of Neotropical freshwater crabs currently comprising 40 genera and at least 255 species and subspecies. The biology of these crabs has been an active field of research in the last 20 years. The aim of the present contribution is to discuss the significance of the new knowledge on the biology of these freshwater crabs after September 1992, to stress the interconnection of the diverse lines of research and at the same time to suggest promising new lines of investigation. All taxa described from September 1992 to October 2004 are listed, including one genus, one subgenus, 62 species and five subspecies. The implications of this new knowledge on the taxonomy, systematic and biogeography of the family are commented.Pseudothelphusidae é um grupo bem diversificado de caranguejos de água doce neotropicais que compreende atualmente 40 gêneros e pelo menos 255 espécies e subespécies. A biologia desses caranguejos vem sendo um ativo campo de pesquisa nos últimos 20 anos. O objetivo desta contribuição é discutir o significado do conhecimento adquirido sobre a biologia desses caranguejos dulcícolas após setembro de 1992, enfatizar a relação das diversas linhas de pesquisa e, ao mesmo tempo, sugerir novas linhas promissoras de investigação. São relacionados todos os táxons descritos de setembro de 1992 a outubro de 2004, compreendendo um gênero, um subgênero, 62 espécies e cinco subespécies. São comentadas as implicações desse novo conhecimento na taxonomia, sistemática e biogeografia da família.

  6. The complete mitochondrial genome of the Violet-spotted reef lobster Enoplometopus debelius (Crustacea, Astacidea, Enoplometopidae).

    Science.gov (United States)

    Ahn, Dong-Ha; Min, Gi-Sik; Park, Joong-Ki; Kim, Sanghee

    2016-05-01

    The violet-spotted reef lobster Enoplometopus debelius Holthuis, 1983 (Decapoda, Astacidea, Enoplometopidae) is found in the tropical reef areas of the Indo-Pacific region, and is a highly prized and very popular species in the aquarium trade industry. The complete mitochondrial genome of E. debelius has 15,641 base pairs consisting of 13 protein-coding genes, 22 transfer RNAs, 2 ribosomal RNAs, and a control region of 746 bp. The base composition of E. debelius is 36.4% A, 35.3% T, 18.1% C, 10.3% G, and the species has an AT content of 71.7%. The E. debelius mitogenome was found to have a gene arrangement and transcriptional polarity identical to that of the Homarus americanus mitogenome, a representative of the arthropod ground pattern. Here, we present the complete mitogenome sequence of E. debelius, which is the first in the superfamily Enoplometopoidea. These data will provide a useful molecular resource for the phylogenetic study of the infraorder Astacidea/order Decapoda.

  7. Reference values for feeding parameters of isopods (Porcellio scaber, Isopoda, Crustacea)

    OpenAIRE

    Damjana Drobne; Samo Drobne

    2014-01-01

    Abstract The advantage of using terrestrial isopods in toxicity studies is that a battery of parameters can be tested at different levels of biological complexity. Feeding parameters for example link organism level response to potential ecological consequences but a problem with using feeding parameters in toxicity tests with terrestrial isopods is their high variability. The aim of our study was to set benchmark values for feeding parameters for isopod Porcellio scaber ( Isopoda , Crustacea ...

  8. Reference values for feeding parameters of isopods ( Porcellio scaber , Isopoda , Crustacea )

    OpenAIRE

    Damjana Drobne; Samo Drobne

    2014-01-01

    Abstract The advantage of using terrestrial isopods in toxicity studies is that a battery of parameters can be tested at different levels of biological complexity. Feeding parameters for example link organism level response to potential ecological consequences but a problem with using feeding parameters in toxicity tests with terrestrial isopods is their high variability. The aim of our study was to set benchmark values for feeding parameters for isopod Porcellio scaber ( Isopoda , Crustacea ...

  9. Spatial distribution and general population characteristics of Pseudanchialina pusilla (Crustacea: Mysida) in the eastern Arabian Sea

    Digital Repository Service at National Institute of Oceanography (India)

    Biju, A.

    in a fast maturation of the individuals, allowing the production of many generations per year. Due to continuous breeding, determining the number of generations becomes more complex (Mees et al., 1994; Delgado, 1997) because generations overlap...: Mysidacea) in a sand beach in south Brazil. Revista Brasileira de Zoologia, 25 (3): 403–412. 9 Delgado L., Guerao G. & Ribera C. 1997. Biolgy of the mysid Mesopodopsis slabberi (van Beneden, 1861) (Crustacea, Mysidacea) in a coastal lagoon of the Ebro...

  10. 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

  11. Two new species of Glyphocrangon (Decapoda: Caridea: Glyphocrangonidae) from the East China Sea and the Philippines.

    Science.gov (United States)

    Han, Qingxi; Li, Xinzheng

    2014-08-18

    The present paper reports two new species of Glyphocrangon (Crustacea, Caridea, Glyphocrangonidae) collected respectively from the East China Sea and the Philippines. G. singularis sp. nov., from the East China Sea, is similar to G. fimbriata Komai & Takeuchi, 1994 with the presence of fringe of setae on dactyl of the third to fifth pereopods, but differs from G. fimbriata by the rostrum shape and the armature on the carapace; G. denticulata sp. nov., from the Philippines, is similar to G. pugnax De Man, 1918 with the entire anterior third carina, but differs from G. pugnax by armatures of the antennal scaphocerite and carapace, the lengths of rostrum and the spines of fifth abdominal somite, and the colouration of carapace. 

  12. A new species of Hemicyclops (Crustacea, Copepoda, Poecilostomatoida, Clausidiidae) associated with hermit crabs in Curaçao

    NARCIS (Netherlands)

    Stock, Jan H.

    1992-01-01

    STOCK, J. H. 1992. A new species of Hemicyclops (Crustacea, Copepoda, Poecilostomatoida, Clausidiidae) associated with hermit crabs in Curaçao. Stud. Nat. Hist. Caribbean Region 71, Amsterdam 1992: 69-78. Hemicyclops geminatus n. sp. is described from the upper infralittoral zone of Curaçao (Antille

  13. On a collection of Decapod and Stomatopod Crustacea from Pulau Berhala, an islet situated in the straits of Malacca

    NARCIS (Netherlands)

    Man, de J.G.

    1929-01-01

    Mr. J. C. VAN DER MEER MOHR, Zoologist at the Deli-Station at Medan (Sumatra), has in 1926 and in August and December 1927 collected at Pulau Berhala 37 species and one variety of Decapod Crustacea and a variety of Gonodactylus chiragra (Fabr.); these species are described in this paper. As far as I

  14. The complete mitogenome of the hydrothermal vent crab Xenograpsus testudinatus (Decapoda, Brachyura) and comparison with brachyuran crabs.

    Science.gov (United States)

    Ki, Jang-Seu; Dahms, Hans-Uwe; Hwang, Jiang-Shiou; Lee, Jae-Seong

    2009-12-01

    In this study, we analyzed the complete mitochondrial (mt) genome of a hydrothermal vent crab Xenograpsus testudinatus (Decapoda: Brachyura) obtained from the hydrothermal vents off Kueishantao Island, Taiwan, which extend from the deep sea Okinawa Trench. The mitogenome of X. testudinatus was 15,796 bp in length and contained the same 37 genes (e.g. 2 rRNAs, 22 tRNAs, and 13 PCGs) found in other metazoan mitogenomes. Analysis of the structural mt gene order in X. testudinatus revealed that the 13 PCGs, excluding a translocation of ND6-Cyt b cluster, were similarly ordered when compared to the pancrustacean ground pattern; however the tRNAs were severely rearranged. Phylogenetic analysis of decapod mitogenomes showed that the molecular taxonomy of the vent crab was in accordance with its morphological systematics. Together, these findings suggest that the vent crab studied here has little mitochondrial genetic variation when compared with morphologically defined conspecifics from other marine habitats.

  15. Distribuição e ecologia dos decapoda numa área estuarina de Ubatuba (SP

    Directory of Open Access Journals (Sweden)

    Jorge de Abreu

    1980-12-01

    Full Text Available Benthic macro fauna (Decapoda was sampled by beam trawl at 6 stations in Bay of Fortaleza and adjacents Escuro e Claro rivers (São Paulo, Ubatuba, Brasil. Samples were taken monthly during 1973-1974. Diversity was high in muddy sand sites of Bay of Fortaleza and low at very shallow stations located in the rivers, where the effects of extreme fluctuations of salinity were evident. The changes in species composition appeared to correspond most clearly to differences in salinity. The total number of species of decapods collected in the areas was 27 (14 species of Natantia and 13 of Reptantia. Juveniles of Penaeus brasiiiensis and Penaeus paulensis reach the rivers. Callinectes danae live in the Bay and in the rivers. Xiphopeneus kroyeri is a specie who inhabit the Bay of Fortaleza in high populational density.

  16. Endemism in the Cladocera (Crustacea: Branchiopoda of Southern Africa

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    Kay Van Damme

    2013-08-01

    Full Text Available We review the current state of knowledge and patterns of distribution in the endemic Cladocera (Crustacea: Branchiopoda of Southern Africa and describe two species of the Western Cape, of which one is new to science. Frey (1993, Korovchinsky (2006 and Smirnov (2008 previously suggested that South Africa harbours few endemics in the Cladocera. In the current study, we show that so-called low endemism in this region is mainly attributed to our limited state of knowledge of the local cladoceran fauna. Many of the South African taxa are ignored and revisions are lacking, as we briefly discuss for the genus Daphnia. We list known Southern African endemic Cladocera with notes on their status, map the distributions of well-studied taxa, and discuss the importance of temporary freshwater rockpools. We confirm that Southern Africa is a region of endemism for the group. We recognise three categories of endemics: i Montane endemics in the East (e.g. Drakensberg mountains; ii endemics of the Western Cape (lowlands; iii South African endemics, widely distributed in the region, both in the mountains and the lowlands. South African endemics have previously been regarded as relicts (Korovchinsky 2006, yet for the two taxa explored in detail in this study, there are no specific primitive morphological characters in comparison to congeners (within their respective genus/species group and the morphology mainly suggests strong isolation. The two species belong to the Chydoridae and the Eurycercidae, respectively, and are used here as case studies for the investigation of Western Cape endemics. The first, Alona capensis Rühe, 1914 (Anomopoda: Chydoridae: Aloninae, is redescribed based on the type material. We discuss the affinities of this enigmatic species for the first time. Morphology of the habitus and the postabdomen parallel that of members of the Alona affinis-complex. The disconnected head pores and limb characters, on the other hand, place A. capensis in

  17. Organization of the mitochondrial genome of mantis shrimp Pseudosquilla ciliata (Crustacea: Stomatopoda).

    Science.gov (United States)

    Podsiadlowski, Lars; Bartolomaeus, Thomas

    2005-01-01

    We determined the nearly complete mitochondrial genome of Pseudosquilla ciliata (Crustacea, Stomatopoda), including all protein-coding genes and all but one of the transfer RNAs. There were no gene rearrangements relative to the pattern shared by crustaceans and hexapods. Phylogenetic analysis using concatenated amino acid sequences of the mitochondrial protein-coding genes confirmed a basal position of Stomatopoda among Eumalacostraca. Pancrustacean relationships based on mitogenomic data were analyzed and are discussed in relation to crustacean and hexapod monophyly and hexapod affinities to crustacean subtaxa.

  18. Ephemeroporus quasimodo sp. nov. (Crustacea: Cladocera: Chydoridae), a new species from the Brazilian Cerrado.

    Science.gov (United States)

    Elmoor-Loureiro, Lourdes M A

    2014-06-19

    A new species of Chydoridae cladoceran (Crustacea: Cladocera: Chydoridae) is described from the Cerrado (a Brazilian tropical savanna ecoregion), Central Brazil. Ephemeroporus quasimodo sp. nov. differs from other species of the genus in a high dorsal keel on carapace and posterior part of the head shield, which resembles a hunchback. Parthenogenetic females, ephippial females and males are described, including details of trunk limb morphology. The species is endemic to shallow wetlands found in the Cerrado, where pristine conditions are preserved. Some questions on genus morphology and taxonomic status of Ephemeroporus species occurring in Brazil are discussed.

  19. [A new species of amphipod crustacean of the genus Amphilochus (Crustacea, Amphipoda, Amphilochidae) from Venezuela].

    Science.gov (United States)

    Martín, A; Ortiz, M; Atienza, D

    2001-01-01

    A new species of amphipod Crustacea (Gammaridea, Amphilochidae) of the genus Amphilochus Bate, 1862, is described. The species was collected in Phallusia nigra (Savigny, 1816) at depths between 0 and 2 m, in the pier piles of the Marina El Ancla and Los Manglares gas station in Morrocoy National Park (Falcón State, Venezuela), during the months of June and July 1998. The main differences between A. ascidicola new species and all others species of the genus recorded from the Gulf of Mexico and the Caribbean Sea, are given.

  20. First Record of Hippa adactyla (Fabricius, 1787; Crustacea, Anomura, Hippidae) from Indonesian Waters.

    Science.gov (United States)

    Ardika, Puji Utari; Farajallah, Achmad; Wardiatno, Yusli

    2015-12-01

    Specimens of Hippa adactyla (Crustacea, Anomura, Hippidae) were collected from several coasts of Indonesia (Sumatera, Java, Bali-Lombok and Sulawesi). This finding represents the first record of this species in Indonesia and confirms its presence in the Indian Ocean and in the Wallacea region. Its systematic and morphological characteristics are described, and its distribution in Indonesia is presented. One of the main characteristics of this species is a median lobe in the anterior part of the carapace, which has 3-4 lobes. Likewise, the left antenna has 2-6 articles.

  1. 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.

  2. Desenvolvimento e morfologia funcional dos estÃmagos de larvas e pÃs-larvas dos crustÃceos Decapoda

    OpenAIRE

    Marlon Aguiar Melo

    2005-01-01

    O conhecimento sobre o correto regime alimentar das larvas e pÃslarvas dos crustÃceos Decapoda à considerado essencial para o sucesso no cultivo larval. InformaÃÃes sobre o desenvolvimento e morfologia dos apÃndices bucais e estÃmago destes crustÃceos tÃm auxiliado na identificaÃÃo de alimentos e condiÃÃes de cultivo satisfatÃrias para o aumento da sobrevivÃncia e do crescimento durante o desenvolvimento larval. O desenvolvimento da estrutura do estÃmago e da funÃÃo digestiva f...

  3. 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.

  4. Efectos del rizocéfalo Loxothylacus armatus (Cirripedia: Rhizocephala en el cangrejo Paraxanthus barbiger (Decapoda: Brachyura en Chile Effects of the rhizocephalan Loxothylacus armatus (Cirripedia: Rhizocephala on the crab Paraxanthus barbiger (Decapoda: Brachyura in Chile

    Directory of Open Access Journals (Sweden)

    MARIO GEORGE-NASCIMENTO

    2006-06-01

    Full Text Available Diversas asociaciones biológicas de amplia distribución y alta especificidad en el ambiente marino han pasado casi desapercibidas para los estudiosos en Chile. Aquí se describe cuantitativamente la infección por Loxothylacus armatus Boschma 1949 (Cirripedia: Rhizocephala en el cangrejo Paraxanthus barbiger (Poeppig 1836 (Decapoda: Brachyura y se evalúa si el parásito produce efectos semejantes a los descritos para asociaciones similares. Para ello, 513 ejemplares del cangrejo fueron recolectados manualmente desde el submareal somero, entre septiembre y octubre de 2003, en Lenga, Octava Región de Chile. La prevalencia de rizocéfalos alcanzó valores máximos cercanos al 60 % en hospedadores de pequeño tamaño corporal, provocando castración, inhibiendo el desarrollo gonadal de las hembras y modificando el tamaño de los caracteres sexuales secundarios en ambos sexos, lo que sugiere que impone una gran demanda sobre su hospedador. Estos resultados muestran una gran similitud con otros estudios que involucran a rizocéfalos, y podrían, al incorporar a las simbiosis en el estudio de las comunidades bentónicas en Chile, conducir a que se reinterprete, por ejemplo, la abundancia y patrones de reproducción de P. barbiger, una especie de depredador prominente de esas comunidades bentónicasIn the marine realm, several biological associations are distributed worldwide and are highly specific, but remain poorly studied in Chile. Here, we describe quantitatively the infection by the barnacle Loxothylacus armatus Boschma 1949 (Cirripedia: Rhizocephala in the crab Paraxanthus barbiger (Poeppig 1836 (Decapoda: Brachyura, and assess if the parasite effects are similar to rhizocephalan-decapod associations elsewhere. To do this, 513 crabs were collected by hand while scuba diving between September and October, 2003 in the shallow subtidal zone of Lenga (37° S, Chile. Maximum prevalence reached ca. 60 % in small body size hosts, producing total

  5. Population structure and reproductive biology of Mesopodopsis orientalis (Crustacea: Mysida) in a tropical mangrove ecosystem in India

    Digital Repository Service at National Institute of Oceanography (India)

    Biju, A.; Panampunnayil, S.U.

    , Sawamoto (1985) obtained an opposite result for the same species in neighboring water of Japan. Delgado et al. (1997) mentioned that clutch size of Mesopodopsis slabberi (van Beneden) vary depending on the geographic populations or different...) Fisheries of planktonic shrimp and shrimp-like in the Gulf of Thailand. Thai Fish Gazet 35, 67 – 88. Delgado L., Guerao G. and Ribera C. (1997) Biology of the mysid Mesopodopsis slabberi (van Beneden, 1861) (Crustacea, Mysidacea) in the coastal lagoon...

  6. 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.

  7. Reference values for feeding parameters of isopods (Porcellio scaber, Isopoda, Crustacea)

    Science.gov (United States)

    Drobne, Damjana; Drobne, Samo

    2014-01-01

    Abstract The advantage of using terrestrial isopods in toxicity studies is that a battery of parameters can be tested at different levels of biological complexity. Feeding parameters for example link organism level response to potential ecological consequences but a problem with using feeding parameters in toxicity tests with terrestrial isopods is their high variability. The aim of our study was to set benchmark values for feeding parameters for isopod Porcellio scaber (Isopoda, Crustacea) in laboratory-controlled experiments. In the work presented here, the daily feeding rate of the central 50% of the control population of Porcellio scaber and a correlation between feeding rate and isopod weight were set. Values outside these ranges need additional evaluation to increase the relevance of test outcomes. We suggest using benchmark values for feeding parameters as well as the coefficient of variation (a) to identify animals with altered feeding parameters with respect to controls, and (b) to assess the data quality in each experiment. PMID:25561844

  8. Reference values for feeding parameters of isopods (Porcellio scaber, Isopoda, Crustacea

    Directory of Open Access Journals (Sweden)

    Damjana Drobne

    2014-11-01

    Full Text Available The advantage of using terrestrial isopods in toxicity studies is that a battery of parameters can be tested at different levels of biological complexity. Feeding parameters for example link organism level response to potential ecological consequences but a problem with using feeding parameters in toxicity tests with terrestrial isopods is their high variability. The aim of our study was to set benchmark values for feeding parameters for isopod Porcellio scaber (Isopoda, Crustacea in laboratory-controlled experiments. In the work presented here, the daily feeding rate of the central 50% of the control population of P. scaber and a correlation between feeding rate and isopod weight were set. Values outside these ranges need additional evaluation to increase the relevance of test outcomes. We suggest using benchmark values for feeding parameters as well as the coefficient of variation (a to identify animals with altered feeding parameters with respect to controls, and (b to assess the data quality in each experiment.

  9. Phagocytosis mediates specificity in the immune defence of an invertebrate, the woodlouse Porcellio scaber (Crustacea: Isopoda).

    Science.gov (United States)

    Roth, Olivia; Kurtz, Joachim

    2009-11-01

    Specificity and memory are the hallmarks of the adaptive immune system of vertebrates. However, phenomena of specificity upon priming of immunity have recently been demonstrated also in invertebrates, which rely exclusively on innate immune defence. It has been suggested that phagocytosis might represent a core candidate for such specificity in invertebrates. We here developed in vitro phagocytosis measurements for different bacteria in the woodlouse Porcellio scaber (Crustacea: Isopoda). After immune priming with heat-killed bacteria, hemocytes showed increased phagocytosis of a previously encountered bacterial strain compared to other bacteria. These data support the role of phagocytosis in invertebrate immunological specificity and suggest a high degree of specificity that even enables to differentiate between strains of the same bacterial species.

  10. Descripción y distribución geográfica de una nueva especie para el archipiélago Juan Fernández: Platymera gaudichaudii (H. Milne-Edwards, 1837 (Decapoda, Calappidae

    Directory of Open Access Journals (Sweden)

    Marco A Retamal

    2013-11-01

    Full Text Available Se identifica una nueva especie en aguas del archipiélago Juan Fernández: Platymera gaudichaudii (Decapoda, Calappidae, ampliándose su distribución geográfica conocida en el hemisferio sur. Se entrega una diagnosis de la especie y se actualiza el status taxonómico de otras tres especies de decápodos en este archipiélago.

  11. Extending the southern range of four shrimps (Crustacea: Decapoda: Stenopodidae, Hippolytidae and Alpheidae) in southwestern Atlantic (27o S) and confirming the presence of Mediterranean Stenopus spinosus Risso, 1827 in Brazil.

    Science.gov (United States)

    Giraldes, Bruno Welter; Freire, Andrea Santarosa

    2015-01-01

    In subtidal zones, certain shrimp species with cryptic behaviour represent a gap in the biodiversity description in many places in the world. This study extends the southern limit of Stenopus hispidus (Oliver, 1811), Alpheus formosus Gibbes, 1850, Alpheus cf. packardii Kingsley, 1880 and Lysmata ankeri Rhyne & Lin, 2006 to Santa Catarina State-Brazil, 27oS. The results also confirm the new occurrence of Stenopus spinosus Risso, 1827 in Brazilian waters. All specimens were collected by scuba diving from rocky islands between 3 and 25 meters depth. We present for each species certain taxonomic features in colour images that will help to identify these decapods in situ in further monitoring programs.

  12. Estrutura populacional de Hepatus pudibundus (Herbst (Crustacea, Decapoda na Armação do Itapocoroy, Penha, Santa Catarina, Brasil Population structure of Hepatus pudibundus (Herbst in the Armação do Itapocoroy, Santa Catarina, Brazil

    Directory of Open Access Journals (Sweden)

    Hélio A. A. Fracasso

    2005-06-01

    Full Text Available Caranguejos são geralmente capturados como fauna acompanhante na pesca de arrasto do camarão sete-barbas, que opera intensivamente no litoral da Armação do Itapocoroy (26º42'36"S-26º46'20"S, 48º35'02"W-48º37'06"W. O objetivo deste estudo é fornecer informações sobre a estrutura da população de H. pudibundus capturados como fauna acompanhante do camarão sete-barbas. De agosto/1998 a julho/1999 foram capturados 1.319 exemplares, dos quais 473 eram machos (35,86% e 846 fêmeas (64,14%. As freqüências relativas entre os sexos foram diferentes do esperado para a população (1:1. As fêmeas ovígeras ocorreram nos meses de dezembro a maio e em julho, sendo mais abundantes em março e se distribuíram nas classes de 3,0 a 7,0 cm. Os jovens foram registrados ao longo do ano, mas com maior abundância nos meses de inverno onde acontece provavelmente o pico de recrutamento. O tamanho de primeira maturação foi estimado em 3,6 cm de largura total da carapaça para as fêmeas e 3,5 cm para os machos. Os machos apresentaram uma associação maior entre a largura da carapaça e o peso fresco que as fêmeas, porém, em ambos o crescimento alométrico entre estas variáveis foi negativo.Crabs are commonly found in the double rigged shrimp fishery by-catch, which operate intensively at the coast of Armação do Itapocoroy (26º42'36"S-26º46'20"S, 48º35'02"W-48º37'06"W. The aim of this study was to provide some information about the population structure of Hepatus pudibundus caught as sea-bob shrimp by-catch. A total of 1,319 individual of H. pudibundus, was captured from August/1998 to July/1999. Sex ratio was skewed for female (846 individuals, 64.14%, and significant, different from the expected 1:1 proportion. The ovigerous females occurred from December to May and in July, being more abundant in March and distributed in the classes from 3.0 to 7.0 cm. The juveniles occurred along the year-round, with higher abundance in winter, where the recruitment peak is supposed to occur. The size of first maturation was estimated in 3.6 cm of total width of the carapace for the females and 3.5 cm for the males. The males presented a larger association between the carapace width and the fresh weight than the females, however, both presented negative alometric between these variables.

  13. 产卵前后罗氏沼虾输卵管的显微和超微结构%Observation on microstructure and ultrastructure of the oviduct of Macrobrachium Rosenbergii (Crustacea, Decapoda)

    Institute of Scientific and Technical Information of China (English)

    于晓云; 卢建平

    2006-01-01

    利用光镜和电镜技术对罗氏沼虾(Macrobrachium rosenbergii)在产卵前后的输卵管结构进行了观察.输卵管由管壁上皮和基膜组成.管壁上皮为一单层柱状上皮细胞,附着在基膜上.电镜下上皮细胞有明暗之分,细胞面向管腔伸出长而密集的微绒毛.细胞核呈椭圆形,核仁一个或者若干,细胞质内含有丰富的线粒体和粗面内质网.产卵前细胞结构完整,核仁明显,管腔内有大量分泌物;产卵后,游离面细胞膜破碎,微绒毛断裂,细胞内含物排向管腔,管腔内残留少量分泌物.

  14. Correct date and authorship of taxa of Middle American freshwater crabs described by Rodríguez & Smalley (1972) (not 1969) and included in Smalley (1970) (Crustacea: Decapoda: Brachyura: Pseudothelphusidae).

    Science.gov (United States)

    Guinot, Danièle; Hendrickx, Michel E

    2014-06-24

    One subgenus and one genus of Pseudothelphusidae described by Gilberto Rodríguez and Alfred E. Smalley from Mexico have been erroneously referred to for over 40 years as variously described in 1968 and 1969. The review of the original publication indicates that these taxa were published in a journal dated 1969 that became available for distribution only in 1972. Smalley (1970), who believed that the original manuscript had been previously published, referred to some of these new taxa (i.e., Epithelphusa, E. mixtepensis, Tehuana and T. veracruzana) and provided sufficient information to make these names available in 1970, thus becoming the correct authorship for these four taxa. Therefore they must be referred to as "Rodríguez & Smalley in Smalley 1970". A list of all affected taxa with the correct publication date and authorship is given. A list of publications in which the taxa authored by Rodríguez and Smalley were erroneously referred to as published in 1969 is also provided.

  15. Calappid and leucosiid crabs (Crustacea: Decapoda: Brachyura) from Kerala, India, with the description of a new species of Mursia Desmarest, 1823, from the Arabian Sea and redescription of M. bicristimana Alcock & Anderson, 1894.

    Science.gov (United States)

    Kumar, Biju A; Kumar, M Sushil; Galil, Bella S

    2013-12-13

    Eleven species of calappid and leucosiid crabs were identified from by-catch landed by trawlers at four fishing ports in Kerala, India that were surveyed in 2007 and supplemented by material obtained in January 2013. Four species are reported for the first time from India, six are new records for Kerala. The status of Mursia bicristimana Alcock & Anderson, 1894, is clarified and the species redescribed. A new species of Mursia is described from the Gulf of Aden, Arabian Sea. 

  16. New records of caridean shrimp (Crustacea: Decapoda) from hydrothermally influenced fields off Futuna Island, Southwest Pacific, with description of a new species assigned to the genus Alvinocaridinides Komai & Chan, 2010 (Alvinocarididae).

    Science.gov (United States)

    Komai, Tomoyuki; Menot, Lenaick; Segonzac, Michel

    2016-01-01

    Five species of caridean shrimp, including four Alvinocarididae Christoffersen, 1986 and one thorid species of the genus Lebbeus White, 1847, are reported from the recently discovered hydrothermal vent field off Futuna Island in the Southwest Pacific (depths 1418-1478 m): Alvinocaridinides semidentatus n. sp., Alvinocaris komaii Zelnio & Hourdez, 2009, Nautilocaris saintlaurentae Komai & Segonzac, 2004, Rimicaris variabilis (Komai & Tsuchida, 2015), and Lebbeus wera Ahyong, 2009. The new species, provisionally assigned to Alvinocaridinides Komai & Chan, 2010, is readily distinguished from the type species of the genus, A. formosa Komai & Chan, 2010, by the characteristic armature of the rostrum and of the propodi of the third and fourth pereopods and the possession of ischial spines on the third and fourth pereopods. Identification of R. variabilis has been confirmed by morphology and sequence comparison of mitochondrial COI gene. The geographical range of L. wera is extended to the north from the Brothers Caldera in the Kermadec Ridge.

  17. Ablação ocular no camarão Macrobrachium rosenbergii (De Man) (Crustacea, Decapoda, Palaemonidae): efeitos sobre a reprodução, pigmentação epidérmica e atividade alimentar

    OpenAIRE

    Marcel José Martins dos Santos; Marcelo Antônio Amaro Pinheiro

    2000-01-01

    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 ...

  18. Differentiation of three common deep-water hermit crabs (Crustacea, Decapoda, Anomura, Parapaguridae from the South African demersal abundance surveys, including the description of a new species of Paragiopagurus Lemaitre, 1996

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    Jannes Landschoff

    2017-05-01

    Full Text Available Deep-water hermit crabs of the family Parapaguridae can be abundant (up to 20 kg or 1000 hermit crab individuals per haul in the trawl bycatch collected during South African demersal abundance research surveys. Until recently, only two parapagurid species had been recognized in the bycatch; Parapagurus bouvieri Stebbing, 1910, and Sympagurus dimorphus (Studer, 1883. Detailed examination of numerous samples of parapagurid specimens from research surveys revealed the existence of a third, undescribed species previously confounded with S. dimorphus, but in fact belonging to a different genus. This new species, Paragiopagurus atkinsonae sp. n. is the 25th in the genus Paragiopagurus Lemaitre, 1996, and has been found only in a small region on the West Coast shelf of South Africa, at depths of 199–277 m. The species is herein fully described and illustrated, including colour images, µCT scans of selected body parts, and CO1 barcode data. The new species is morphologically most similar to P. ventilatus Lemaitre, 2004, a species associated with hydrothermal vents, but differs in armature of the fourth antennal segment (armed with a spine on the dorsolateral distal angle vs. unarmed in P. ventilatus; setation of the antennal flagella (nearly naked vs. with dense setae in P. ventilatus; plumose setation on the third maxillipeds and basal segments of chelipeds (absent vs. present in P. ventilatus; number of rows of scales on the propodal rasp of pereopod 4 (two or three rows vs. one row in P. ventilatus; and degree of telson asymmetry (weakly asymmetrical vs. strongly asymmetrical in P. ventilatus. Paragiopagurus atkinsonae sp. n. is superficially similar to S. dimorphus, with males of the two species showing the same extreme degree of sexual dimorphism on the right cheliped, general light orange colouration, and frequent use of colonial zoanthid carcinoecia for pleonal protection. To aid in future identifications and to facilitate data gathering during surveys, a comparison of P. atkinsonae sp. n. with S. dimorphus is provided, along with descriptions of colouration and photographs of live specimens of all three parapagurid species. Information on taxonomy of the species is summarized, as well as knowledge of their distribution in the demersal research survey regions of South Africa.

  19. "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.

  20. 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

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    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.

  1. Crescimento e fator de condição na fase juvenil de Farfantepenaeus brasiliensis (Latreille e F. paulensis (Pérez-Farfante (Crustacea, Decapoda, Penaeidae em uma lagoa costeira tropical do Rio de Janeiro, Brasil Growth and condition factor in the juvenile phase of Farfantepenaeus brasiliensis (Latreille and F. paulensis (Pérez-Farfante (Crustacea, Decapoda, Penaeidae in a tropical coastal lagoon of Rio de Janeiro, Brazil

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    Edélti Faria Albertoni

    2003-09-01

    Full Text Available The growth relations of the shrimps Farfantepenaeus brasiliensis (Latreille, 1817 and F. paulensis (Pérez-Farfante, 1967 were evaluated at Imboassica lagoon, Macaé, Rio de Janeiro State, between June 1995 and September 1997, in four periods after events of sandbar opening. This sandbar separated the lagoon from the Atlantic Ocean. Through the evaluation of the weight/length relationships for the two species, significant differences in each interval after the sandbar openings were observed, as much among males and females as among all individuals of the same species. The results indicated that both species presented negative allometric growth in most of the studied occasions. The frequency and abundance of the two species in the lagoon is linked to many factors, among them the season of the sandbar opening, the span of time in which the sandbar remains opened, and the presence of a reproductive stock of adults close to the area when the sandbar is open. Through the analysis of the relative condition factor (Kr, it was verified that usually the conditions inside the lagoon are favorable to the development of both species, with the exception of the occasions when the sandbar opening events happen quickly and close to each other, allowing to conclude that the sandbar openings have an influence on the growth rates and in the general status of the organisms.

  2. Crecimiento del cangrejo Callinectes danae (Decapoda: Portunidae de la Isla de Margarita, Venezuela

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    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

  3. Composição e distribuição dos Crustácea (Decapoda na Lagoa do Peixe, Rio Grande do Sul, Brasil Composition and distribution of Crustácea (Decapoda from Lagoa do Peixe, Rio Grande do Sul, Brazil

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    Sandro Santos

    2000-03-01

    Full Text Available The Lagoa do Peixe ("Peixe's Lagoon" is located between Atlantic Ocean and Lagoa dos Patos and is 30 Km long and 0,5-2,0 Km wide (31º13'S, 50º55'W -31º26'S, 51º09'. For one year, the composition and distribution of Crustácea Decapoda were analyzed monthly (from July/1994 to June/1995, in seven subareas (terrestrial border and aquatic area and physical and chemical parameters (depth, salinity, sediment texture, oxygen in water, organic material of sediment and water temperature were registered. Decapoda from the families Grapsidae, Ocypodidae, Portunidae (Brachyura, Diogenidae (Anomura and Penaeidae (Penaeidea were captured. Chasmagnathus granulata Dana 1851 was found ali months near the canal connecting Atlantic Ocean and Lagoa do Peixe, but inside the lagoon it was collected only in October/94 and June/95, and in extreme subareas it was sampled in February/95 when the salinity was 31 ‰ at these sites. Callinectes sapidus Rathbun, 1896 and Cyrtograpsus angulatus Dana, 1851 were captured throughout the year, except October/94 and April/95, respectively. Both species were found in ali áreas of sample, indicating a high plasticity in relation to the factors analyzed in this study. Another species captured probably come in the lagoon in specific months, when the environment provides ideal conditions for their develo-pments.

  4. 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

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    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.

  5. 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

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    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.

  6. 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

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    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.

  7. 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)

    OpenAIRE

    Edward Barriga; Carlos Salazar; Jacqueline Palacios; Miguel Romero; Aldo Rodríguez

    2009-01-01

    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, com...

  8. Ecologia populacional, estratégias reprodutivas e uso de recursos por isópodos terrestres neotropicais (Crustacea, isopoda)

    OpenAIRE

    Aline Ferreira Quadros

    2009-01-01

    Os isópodos terrestres (Crustacea, Oniscidea) apresentam adaptações únicas à vida terrestre, tanto fisiológicas quanto morfológicas e comportamentais. Habitam uma grande variedade de ambientes e são facilmente capturados e mantidos em laboratório, constituindo assim um ótimo modelo para investigações que contribuam para um melhor entendimento da ecologia de solo. Apesar de sua grande importância para o funcionamento dos ecossistemas através da detritivoria e da posição chave que ocupam nas te...

  9. A review of Epipenaeon ingens Nobili, 1906 (Isopoda: Bopyridae) host species and documentation of a new host, Metapenaeopsis stridulans (Alcock, 1905) (Decapoda: Penaeidae)

    Institute of Scientific and Technical Information of China (English)

    M. RAJKUMAR; S.MANOKARAN; SUN Jun; J.P.TRILLES

    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.

  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. 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.

  12. Toxicity of imidacloprid to the terrestrial isopod Porcellio scaber (Isopoda, Crustacea).

    Science.gov (United States)

    Drobne, Damjana; Blazic, Mateja; Van Gestel, Cornelis A M; Leser, Vladka; Zidar, Primoz; Jemec, Anita; Trebse, Polonca

    2008-04-01

    Imidacloprid is a neonicotinoid insecticide with neurotoxic action that, as a possible alternative for commonly used organophosphorus pesticides, has gained registration in about 120 countries for use in over 140 agricultural crops. Only few data are available on its toxicity for soil invertebrates. We therefore assessed the effects of imidacloprid on survival, weight gain, feeding rate, total protein content, glutathione S-transferase activity (GST), and digestive gland epithelial thickness in juveniles and adults of the terrestrial isopod Porcellio scaber. After two weeks of feeding on imidacloprid-dosed food, weight gain (NOEC 5 microg/g dry food) and feeding rate (NOEC 10 microg/g) in juveniles, and feeding rate (NOECPorcellio scaber, Isopoda, Crustacea). Chemosphere 64, 1745-1752]. At actual environmental concentrations, diazinon poses a higher risk to P. scaber. Due to its increasing use in crop protection and higher persistence in soil, imidacloprid might however, be potentially more dangerous after long-term application. We conclude that toxicity testing with P. scaber provides relevant, repeatable, reproducible and comparable toxicity data that is useful for the risk assessment of pesticides in the terrestrial environment.

  13. Photon activation analysis of trace elements in several kinds of invertebrate animals. 1. Arthropoda crustacea

    Energy Technology Data Exchange (ETDEWEB)

    Fukushima, Michiko; Tamate, Hidetoshi [Ishinomaki Senshu Univ., Miyagi (Japan)

    1998-09-01

    Quantitative analysis of trace elements was made for marine mollusca by light quantum activation method. Crustacea which is likely to be well reflecting the environment of ocean floor was used as the subjects. Various kinds of these animals including Carcinus Portunus. Palinurus, Panulirus, Squilla etc. were collected from the sea off Japan to determine the concentrations of 15 kinds of elements in the gills, muscles, head/thorax region and viceraneous organs. The concentration of As was found markedly high in either of gills, muscles or viceraneous organs of Palinurus taken from the sea near Okinawa. It was found that there are no difference in the concentrations of As, Fe, Mn and Pb among the species studied and Fe, Mn and Pb were detected at high levels in the gills of Carcinus, whereas the Fe and Mn concentrations in the gills of Palinurus were considerably lower than other species tested. Thus, the element concentration was different among the regions studied and also species. (M.N.)

  14. The developmental trend of labrum and median eyes of Orsten-type preserved Phosphatocopina (Crustacea)

    Institute of Scientific and Technical Information of China (English)

    2010-01-01

    The Phosphatocopina (Crustacea,Arthropoda) is an important group of ’Orsten-type’ preserved fossils.It is resolved as the sister-group of Eucrustacea.Here we study the labrum,the median eyes,and the inner lamella of Phosphatocopina based on the selected specimens respectively from western Hunan,South China,and Sweden.The labrum characters of different species exhibit interspecific difference.The ratio of labrum length/shield length is significant to the reconstruction of the ontogeny of phosphatocopines.The labrum characters should be introduced to the diagnosis of Phosphatocopina.In the earliest growth stage,the median eyes were inconspicuous,almost as flat as the other area of the hypstome.However,with the growth of the individuals they became conspicuous.There were two obviously concave structures on the ventral side of the hypostome in later stages,which were the positions where the median eyes should have been located.In addition,the two modes of preservation of the inner lamella,i.e.,that of shrinking and that of bulging up,are interpreted as the preservational artifact herein.

  15. 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

  16. Benthic Crustacea from tropical and temperate reef locations: differences in assemblages and their relationship with habitat structure

    Science.gov (United States)

    Kramer, Michael J.; Bellwood, David R.; Taylor, Richard B.; Bellwood, Orpha

    2017-09-01

    Tropical and temperate marine habitats have long been recognised as fundamentally different system, yet comparative studies are rare, particularly for small organisms such as Crustacea. This study investigates the ecological attributes (abundance, biomass and estimated productivity) of benthic Crustacea in selected microhabitats from a tropical and a temperate location, revealing marked differences in the crustacean assemblages. In general, microhabitats from the tropical location (dead coral, the epilithic algal matrix [algal turfs] and sand) supported high abundances of small individuals (mean length = 0.53 mm vs. 0.96 mm in temperate microhabitats), while temperate microhabitats (the brown seaweed Carpophyllum sp., coralline turf and sand) had substantially greater biomasses of crustaceans and higher estimated productivity rates. In both locations, the most important microhabitats for crustaceans (per unit area) were complex structures: tropical dead coral and temperate Carpophyllum sp. It appears that the differences between microhabitats are largely driven by the size and relative abundance of key crustacean groups. Temperate microhabitats have a higher proportion of relatively large Peracarida (Amphipoda and Isopoda), whereas tropical microhabitats are dominated by small detrital- and microalgal-feeding crustaceans (harpacticoid copepods and ostracods). These differences highlight the vulnerability of tropical and temperate systems to the loss of complex benthic structures and their associated crustacean assemblages.

  17. Crustacea: Branchiura

    African Journals Online (AJOL)

    1993-03-25

    Mar 25, 1993 ... Mid-sagittal section through male 3,6 mm tot a] length. AM anterior midgut ..... The cuticle-I ined hindgut is a straight tube, 0,8 mm in length in a 3,6-mm ..... organs. preoral spine and digestive organs, Acta Univ. Lund. 13: 1-33.

  18. Arthropoda. Crustacea

    NARCIS (Netherlands)

    Böhm, Joh.

    1909-01-01

    Die mehrfach unterbrochene Kette tertiärer und jüngerer vulkanischer Gesteine, welche Java der Länge nach durchzieht, wird nordwärts und südwärts sowie in den Lücken von tertiären und quartären Ablagerungen eingerahmt ¹). Kreideformation und hoch krystalline Schiefer treten ganz vereinzelt und auf w

  19. Lysosomal membrane stability in laboratory- and field-exposed terrestrial isopods Porcellio scaber (Isopoda, Crustacea).

    Science.gov (United States)

    Nolde, Natasa; Drobne, Damjana; Valant, Janez; Padovan, Ingrid; Horvat, Milena

    2006-08-01

    Two established methods for assessment of the cytotoxicity of contaminants, the lysosomal latency (LL) assay and the neutral red retention (NRR) assay, were successfully applied to in toto digestive gland tubes (hepatopancreas) of the terrestrial isopod Porcellio scaber (Isopoda, Crustacea). In vitro exposure of isolated gland tubes to copper was used as a positive control to determine the performance of the two methods. Lysosomal latency and the NRR assay were then used on in vivo (via food) laboratory-exposed animals and on field populations. Arbitrarily selected criteria for determination of the fitness of P. scaber were set on the basis of lysosomal membrane stability (LMS) as assessed with in toto digestive gland tubes. Decreased LMS was detected in animals from all polluted sites, but cytotoxicity data were not in agreement with concentrations of pollutants. Lysosomal membrane stability in the digestive gland tubes of animals from an environment in Idrija, Slovenia that was highly polluted with mercury (260 microg/g dry wt food and 1,600 microg/g dry wt soil) was less affected than LMS in laboratory animals fed with 5 and 50 microg Hg/g dry weight for 3 d. This probably indicates tolerance of P. scaber to mercury in the mercury-polluted environment and/or lower bioavailability of environmental mercury. In animals from the vicinity of a thermal power plant with environmental mercury concentrations three to four orders of magnitude lower than those in Idrija, LMS was severely affected. In general, the LL assay was more sensitive than the NRR assay. The LMS assay conducted on digestive gland tubes of terrestrial isopods is highly recommended for integrated biomarker studies.

  20. Reduction and methylation of mercury in the terrestrial isopod Porcellio scaber (Crustacea) and its environment.

    Science.gov (United States)

    Nolde, Natasa; Drobne, Damjana; Horvat, Milena; Jereb, Vesna

    2005-07-01

    Reduction and methylation of inorganic mercury in Porcellio scaber (Isopoda, Crustacea) and its environment were studied, using a purpose-built experimental setup where Hg cycling was followed using 203Hg2+ tracer in experiments without and with isopods. In experiment without isopods, daily reduction of 203Hg2+ to 203Hg0 under sterile and nonsterile conditions was measured for three weeks to assess the contribution of bacteria to this process. In experiments with isopods, daily release of 203Hg0 was measured for two weeks. Total mercury (T203Hg) and monomethylmercury (Me203Hg) in whole animals, gut, digestive glands (hepatopancreas), food (hazelnut leaves), and feces were measured to obtain the assimilation and distribution of mercury in the animals, to investigate the origin and fate of Me203Hg, and, finally, to assess the mass balance of mercury in the experimental system. Experiment without isopods showed the important role of bacteria in reduction of 203Hg2+ to 203Hg0, especially in the first day of the experiment. Experiments with isopods showed that formation of 203Hg0 depended on the 203Hg2+ concentration in the food. The contribution of the isopod's digestive flora in reduction of 203Hg2+ to 203Hg0 was negligible. Approximately 3% of T203Hg and 2% of Me203Hg consumed was assimilated by the animals. Methylation of 203Hg2+ occurred already in the leaves before they were consumed by the isopods. Assimilation of Me203Hg from the food surprisingly was low. Also, a loss of Me203Hg was noticed when comparing assimilated and excreted Me203Hg versus consumed Me203Hg. This may be explained by the assumption that demethylation of MeHg prevailed over methylation of Hg2+ in the animal's digestive system, leading to excretion of ingested mercury as Hg2+.

  1. Cell Death in the Epithelia of the Intestine and Hepatopancreas in Neocaridina heteropoda (Crustacea, Malacostraca.

    Directory of Open Access Journals (Sweden)

    Lidia Sonakowska

    Full Text Available The endodermal region of the digestive system in the freshwater shrimp Neocaridina heteropoda (Crustacea, Malacostraca consists of a tube-shaped intestine and large hepatopancreas, which is formed by numerous blind-ended tubules. The precise structure and ultrastructure of these regions were presented in our previous studies, while here we focused on the cell death processes and their effect on the functioning of the midgut. We used transmission electron microscopy, light and confocal microscopes to describe and detect cell death, while a quantitative assessment of cells with depolarized mitochondria helped us to establish whether there is the relationship between cell death and the inactivation of mitochondria. Three types of the cell death were observed in the intestine and hepatopancreas-apoptosis, necrosis and autophagy. No differences were observed in the course of these processes in males and females and or in the intestine and hepatopancreas of the shrimp that were examined. Our studies revealed that apoptosis, necrosis and autophagy only involves the fully developed cells of the midgut epithelium that have contact with the midgut lumen-D-cells in the intestine and B- and F-cells in hepatopancreas, while E-cells (midgut stem cells did not die. A distinct correlation between the accumulation of E-cells and the activation of apoptosis was detected in the anterior region of the intestine, while necrosis was an accidental process. Degenerating organelles, mainly mitochondria were neutralized and eventually, the activation of cell death was prevented in the entire epithelium due to autophagy. Therefore, we state that autophagy plays a role of the survival factor.

  2. The complete mitochondrial genome of the red-banded lobster Metanephrops thomsoni (Crustacea, Astacidea, Nephropidae): a novel gene order.

    Science.gov (United States)

    Ahn, Dong-Ha; Min, Gi-Sik; Park, Joong-Ki; Kim, Sanghee

    2016-07-01

    The complete mitochondrial genome (mitogenome) of the red-banded lobster, Metanephrops thomsoni (Decapoda, Astacidea, Nephropidae), is 19,835 bp in length and contains 13 protein-coding genes (PCGs), 2 ribosomal RNAs, 24 transfer RNAs (including additional copies of trnW and trnL1), and 2 control regions (CR). The mitogenome of M. thomsoni has 10 long intergenic sequences (71-237 bp) with a high AT content (70.0%). The two CRs show 59.6% similarity and have an identical sequence region with a length of 295 bp. The mitogenome of M. thomsoni shows a novel gene arrangement compared with the pancrustacean ground pattern and is identical to that of M. sibogae, except for the two additional tRNAs (trnW and trnL1). Phylogenetic tree from maximum likelihood analysis using the concatenated sequences of 13 PCGs depicted M. thomsoni as one of the members of the superfamily Nephropoidea within Astacidea.

  3. 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.

  4. 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

    2012-12-01

    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.

  5. Focused ion beam/scanning electron microscopy studies of Porcellio scaber (Isopoda, Crustacea) digestive gland epithelium cells.

    Science.gov (United States)

    Drobne, Damjana; Milani, Marziale; Zrimec, Alexis; Zrimec, Maja Berden; Tatti, Francesco; Draslar, Kazimir

    2005-01-01

    The focused ion beam (FIB) was used to prepare cross sections of precisely selected regions of the digestive gland epithelium of a terrestrial isopod P. scaber (Isopoda, Crustacea) for scanning electron microscopy (SEM). The FIB/SEM system allows ad libitum selection of a region for gross morphologic to ultrastructural investigation, as the repetition of FIB/SEM operations is unrestricted. The milling parameters used in our work proved to be satisfactory to produce serial two-dimensional (2-D) cuts and/or three-dimensional (3-D) shapes on a submicrometer scale. A final, cleaning mill at lower ion currents was employed to minimize the milling artifacts. After cleaning, the milled surface was free of filament- and ridge-like milling artifacts. No other effects of the cleaning mill were observed.

  6. Bioaccumulation in Porcellio scaber (Crustacea, Isopoda) as a measure of the EDTA remediation efficiency of metal-polluted soil.

    Science.gov (United States)

    Udovic, Metka; Drobne, Damjana; Lestan, Domen

    2009-10-01

    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.

  7. Dinâmica da alimentação natural de Callinectes danae Smith (Decapoda, Portunidae na Lagoa da Conceição, Florianôpolis, Santa Catarina, Brasil Feeding natural dynamics of Callinectes danae Smith (Decapoda, Portunidae from Lagoa da conceição, Florianópolis, Santa Catarina, Brasil

    Directory of Open Access Journals (Sweden)

    Joaquim Olinto Branco

    1997-12-01

    Full Text Available From March/91 to February/92 monthly collcction surveys were carried out to obtain basic information about the dynamics of feeding and trophic spectrum of C. danae Smith, 1869. A total of 456 males and 527 females were caught. The diet of the species was not sex related. The trophic spectrum of C. danae is composed by a high number of items. The 35 items were assembled in 14 categories and the feeding index was applied. Mollusca, Polychaeta and Crustacea were observed to be basic elements in the species diet, Osteichthyes and MOND appear as secondary resource whereas vegetal material were found to be of less importance.

  8. Abbreviation of larval development and extension of brood care as key features of the evolution of freshwater Decapoda.

    Science.gov (United States)

    Vogt, Günter

    2013-02-01

    The transition from marine to freshwater habitats is one of the major steps in the evolution of life. In the decapod crustaceans, four groups have colonized fresh water at different geological times since the Triassic, the freshwater shrimps, freshwater crayfish, freshwater crabs and freshwater anomurans. Some families have even colonized terrestrial habitats via the freshwater route or directly via the sea shore. Since none of these taxa has ever reinvaded its environment of origin the Decapoda appear particularly suitable to investigate life-history adaptations to fresh water. Evolutionary comparison of marine, freshwater and terrestrial decapods suggests that the reduction of egg number, abbreviation of larval development, extension of brood care and lecithotrophy of the first posthatching life stages are key adaptations to fresh water. Marine decapods usually have high numbers of small eggs and develop through a prolonged planktonic larval cycle, whereas the production of small numbers of large eggs, direct development and extended brood care until the juvenile stage is the rule in freshwater crayfish, primary freshwater crabs and aeglid anomurans. The amphidromous freshwater shrimp and freshwater crab species and all terrestrial decapods that invaded land via the sea shore have retained ocean-type planktonic development. Abbreviation of larval development and extension of brood care are interpreted as adaptations to the particularly strong variations of hydrodynamic parameters, physico-chemical factors and phytoplankton availability in freshwater habitats. These life-history changes increase fitness of the offspring and are obviously favoured by natural selection, explaining their multiple origins in fresh water. There is no evidence for their early evolution in the marine ancestors of the extant freshwater groups and a preadaptive role for the conquest of fresh water. The costs of the shift from relative r- to K-strategy in freshwater decapods are traded

  9. 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.

  10. Batı Karadeniz Bölgesindeki Bazı Göllerin Malacostraca (Crustacea Faunası.

    Directory of Open Access Journals (Sweden)

    Murat Özbek

    2015-12-01

    Full Text Available Batı Karadeniz Bölgesi ve Sakarya Nehri Havzası’nda yer alan 13 gölün [Poyrazlar, Küçük Akgöl, Taşkısığı, Büyük Akgöl, Acarlar, Melen, Abant, Gölcük (Bolu, Yeniçağa, Karamurat, Sülük, Çubuk ve Sünnet gölleri] Malacostraca faunasını belirlemek amacıyla, 12-16 Ağustos 2002 ve 23-27 Haziran 2003 tarihlerinde iki örnekleme çalışması yapılmıştır. Örneklemelerde 500 µm göz açıklığındaki el kepçeleri ve Ekman grab kullanılmıştır. Elde edilen materyal %4’lük formaldehit solüsyonunda fikse edilmiştir. Örnekleme yapılan lokalitelerin sıcaklık, pH, çözünmüş oksijen, oksijen doygunluğu, tuzluluk, iletkenlik ve berraklık değerleri arazide ölçülmüştür. Çalışma sonucunda Decapoda, Isopoda ve Mysidacea ordolarından 1’er, Amphipoda ordosundan 7 olmak üzere toplam 10 takson tespit edilmiştir

  11. 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.

  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. Petalophthalmus papilloculatus sp. nov. (Crustacea: Mysida: Petalophthalmidae), a new bathyal suprabenthic mysid from the Galicia Bank (NE Atlantic Ocean).

    Science.gov (United States)

    Vicente, Carlos San; Frutos, Inmaculada; Cartes, Joan E

    2014-02-14

    A new species of the genus Petalophthalmus (Crustacea: Mysida: Petalophthalmidae) is described, based on specimens collected from the Galicia Bank (northeastern Atlantic Ocean). This species can be distinguished from the other species of the genus Petalophthalmus by the presence of an ocular papilla on its eyes. P. papilloculatus sp. nov. is morphologically close to the cosmopolitan species P. armiger Willemoes-Suhm, 1875, but can be easily distinguished by the presence of an ocular papilla, the longer antennal scales bearing an apical lobe, the unique chitinous ridge on the molar process, the outwards lengthening of the three cuspidate setae on the outer margin of the uropodal exopod and the armature of the telson. This new species lives on fine and very fine sandy bottoms at the bank flanks, between 1536 and 1809 m depths. Probably related to the special biogeographic characteristics of seamounts, the morphological affinity between the new species and P. armiger supports the hypothesis on a common ancestry and recent divergence between both deep sea mysids. An identification key to world species of Petalophthalmus is provided.

  14. A new late Eocene Bicornucythere species (Ostracoda, Crustacea) from Myanmar, and its significance for the evolutionary history of the genus.

    Science.gov (United States)

    Yamaguchi, Tatsuhiko; Suzuki, Hisashi; Soe, Aung-Naing; Htike, Thaung; Nomura, Ritsuo; Takai, Masanaru

    2015-02-17

    The ostracode genus Bicornucythere (Ostracoda, Crustacea) is abundant in modern-day eutrophic marine bays, and is widely distributed in estuaries and inner bays throughout East Asia, including in China, Korea, Japan, and the Russian Far East. The evolutionary history of Bicornucythere is poorly understood. Here, we report on a new species of Bicornucythere (Bicornucythere concentrica sp. nov.) from the upper Eocene Yaw Formation in the Central Myanmar Basin. The oldest previously known Bicornucythere taxon, Bicornucythere secedens, was reported from lower Miocene strata in India, although a molecular phylogeny suggests that the genus first appeared in the Late Cretaceous. Bicornucythere concentrica sp. nov. is at least 10.9 million years older than the earliest known B. secedens. The new species occurs with Ammonia subgranulosa, a benthic foraminifer, an association that is representative of brackish water conditions in modern Asian bays. Our findings indicate that extant genera have inhabited Asian bays since the late Eocene. The paleobiogeography of Bicornucythere indicates that the taxon was dispersed onto Indian coasts during the collision between the Indian and Eurasian plates.

  15. Prolonged feeding of terrestrial isopod (Porcellio scaber, Isopoda, Crustacea) on TiO (2) nanoparicles. Absence of toxic effect.

    Science.gov (United States)

    Novak, Sara; Drobne, Damjana; Menard, Anja

    2012-01-01

    Nanoparticles of titanium dioxide are one of most widely used nanomaterials in different products in everyday use and in industry, but very little is known about their effects on non- target cells and tissues. Terrestrial isopods were exposed to food dosed with nano-TiO(2) to give final nominal concentration 1000 and 2000 µg TiO(2)/g dry weight of food. The effects of ingested nano-TiO(2) on the model invertebrate Porcellio scaber (Isopoda, Crustacea) after short-term (3 and 7 days) and prolonged (14 and 28 days) dietary exposure was assessed by conventional toxicity measures such as feeding rate, weight change and mortality. Cell membrane destabilization was also investigated. No severe toxicity effects were observed after 3, 7, 14 or 28 days of dietary exposure to nano-TiO(2), but some animals, particularly those exposed to lower concentrations of nanoparticles, had severely destabilized digestive cell membranes. It was concluded that strong destabilization of the cell membrane was sporadic, and neither concentration- nor time-related. Further research is needed to confirm this sporadic toxic effect of nanoparticles.

  16. Prolonged feeding of terrestrial isopod (Porcellio scaber, Isopoda, Crustacea on TiO2 nanoparicles. Absence of toxic effect

    Directory of Open Access Journals (Sweden)

    Sara Novak

    2012-03-01

    Full Text Available Nanoparticles of titanium dioxide are one of most widely used nanomaterials in different products in everyday use and in industry, but very little is known about their effects on non- target cells and tissues. Terrestrial isopods were exposed to food dosed with nano-TiO2 to give final nominal concentration 1000 and 2000 µg TiO2/g dry weight of food. The effects of ingested nano-TiO2 on the model invertebrate Porcellio scaber (Isopoda, Crustacea after short-term (3 and 7 days and prolonged (14 and 28 days dietary exposure was assessed by conventional toxicity measures such as feeding rate, weight change and mortality. Cell membrane destabilization was also investigated. No severe toxicity effects were observed after 3, 7, 14 or 28 days of dietary exposure to nano-TiO2, but some animals, particularly those exposed to lower concentrations of nanoparticles, had severely destabilized digestive cell membranes. It was concluded that strong destabilization of the cell membrane was sporadic, and neither concentration- nor time-related. Further research is needed to confirm this sporadic toxic effect of nanoparticles.

  17. Linkage of biomarkers along levels of biological complexity in juvenile and adult diazinon fed terrestrial isopod (Porcellio scaber, Isopoda, Crustacea).

    Science.gov (United States)

    Stanek, Katja; Drobne, Damjana; Trebse, Polonca

    2006-09-01

    In parallel laboratory experiments, we determined the effect of a typical representative of organophosphorous pesticides, diazinon, on AChE activity, lipid, protein and glycogen content, weight change, feeding activity and mortality of juvenile and adult terrestrial isopods Porcellio scaber (Isopoda, Crustacea). Organophosphorous pesticides (OP) are among the most extensively used pesticides, which have replaced organochlorine pesticides. OPs inhibit the enzyme acetylcholinesterase (AChE), resulting in neurotoxicity. They have more widespread effects on non-target organisms than do organochlorine pesticides. The aim of this study was to link effect of diazinon on target enzyme to energy reserves and to integrated biomarker responses in juvenile and adult P. scaber. The non-observed effect concentration (NOEC) for AChE activity after diazinon exposure in two weeks toxicity study with isopods was below 5 microg/g diazinon. There was a good agreement between concentrations at which AChE and survival were affected (10 microg/g diazinon in juveniles, 100 microg/g diazinon in adults). We revealed a link among AChE activity, protein content and mortality. Glycogen and lipid content, feeding activity and weight change were not affected in two weeks diazinon exposure up to 100 microg/g diazinon. Juveniles were affected at concentrations that were an order of magnitude lower than those provoking similar effects on adults. Recommendations are made for future toxicity studies with terrestrial isopods.

  18. "Candidatus Bacilloplasma," a novel lineage of Mollicutes associated with the hindgut wall of the terrestrial isopod Porcellio scaber (Crustacea: Isopoda).

    Science.gov (United States)

    Kostanjsek, Rok; Strus, Jasna; Avgustin, Gorazd

    2007-09-01

    Pointed, rod-shaped bacteria colonizing the cuticular surface of the hindgut of the terrestrial isopod crustacean Porcellio scaber (Crustacea: Isopoda) were investigated by comparative 16S rRNA gene sequence analysis and electron microscopy. The results of phylogenetic analysis, and the absence of a cell wall, affiliated these bacteria with the class Mollicutes, within which they represent a novel and deeply branched lineage, sharing less than 82.6% sequence similarity to known Mollicutes. The lineage has been positioned as a sister group to the clade comprising the Spiroplasma group, the Mycoplasma pneumoniae group, and the Mycoplasma hominis group. The specific signature sequence was identified and used as a probe in in situ hybridization, which confirmed that the retrieved sequences originate from the attached rod-shaped bacteria from the hindgut of P. scaber and made it possible to detect these bacteria in their natural environment. Scanning and transmission electron microscopy revealed a spherically shaped structure at the tapered end of the rod-shaped bacteria, enabling their specific and exclusive attachment to the tip of the cuticular spines on the inner surface of the gut. Specific adaptation to the gut environment, as well as phylogenetic positioning, indicate the long-term association and probable coevolution of the bacteria and the host. Taking into account their pointed, rod-shaped morphology and their phylogenetic position, the name "Candidatus Bacilloplasma" has been proposed for this new lineage of bacteria specifically associated with the gut surface of P. scaber.

  19. Bioaccumulation in Porcellio scaber (Crustacea, Isopoda) as a measure of the EDTA remediation efficiency of metal-polluted soil

    Energy Technology Data Exchange (ETDEWEB)

    Udovic, Metka [Centre for Soil and Environmental Science, Department of Agronomy, Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, Sl-1000 Ljubljana (Slovenia); Drobne, Damjana [Department of Biology, Biotechnical Faculty, University of Ljubljana, Vecna pot 111, SI-1000 Ljubljana (Slovenia); Lestan, Domen, E-mail: domen.lestan@bf.uni-lj.s [Centre for Soil and Environmental Science, Department of Agronomy, Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, Sl-1000 Ljubljana (Slovenia)

    2009-10-15

    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.

  20. Behavioural and Physiological Implications of a Burrow-dwelling Lifestyle for Two Species of Upogebiid Mud-shrimp (Crustacea: Thalassinidea)

    Science.gov (United States)

    Astall, C. M.; Taylor, A. C.; Atkinson, R. J. A.

    1997-02-01

    Upogebia stellataand U. deltaura(Crustacea: Thalassinidea) construct burrows in nearshore sediments in U.K. waters. Burrow structure is similar in both species; the basic burrow consisting of a two-opening, U-shaped section with a vertical shaft descending from the mid-point of the U. This structure may be variously elaborated. Burrow cross-section is circular, dilations allow turning by somersaulting and surface openings are often constricted. Conditions within the burrows are usually hypoxic and hypercapnic. Burrow water PO 2in the parts normally occupied by the mud-shrimp was between 80-110 Torr, but was much lower (10-45 Torr) in the deepest, poorly-irrigated parts. Both species irrigate their burrows by episodes of pleopod beating of variable duration (mean=8·5±3·5 min and 2·8±0·5 min for U. deltauraand U. stellata, respectively), which draws oxygenated water into the burrow and also particulate food for suspension feeding. When exposed to hypoxia, U. deltauraand U. stellatawere able to maintain their rates of oxygen consumption approximately constant over a wide range of PO 2( Pc=30-50 Torr). Under these conditions, there was a pronounced increase in scaphognathite beat rate but heart rate remained relatively constant. Below the Pc, however, both rates declined.

  1. 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.

  2. 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. PMID:28282457

  3. Muscle precursor cells in the developing limbs of two isopods (Crustacea, Peracarida): an immunohistochemical study using a novel monoclonal antibody against myosin heavy chain.

    Science.gov (United States)

    Kreissl, S; Uber, A; Harzsch, S

    2008-05-01

    In the hot debate on arthropod relationships, Crustaceans and the morphology of their appendages play a pivotal role. To gain new insights into how arthropod appendages evolved, developmental biologists recently have begun to examine the expression and function of Drosophila appendage genes in Crustaceans. However, cellular aspects of Crustacean limb development such as myogenesis are poorly understood in Crustaceans so that the interpretative context in which to analyse gene functions is still fragmentary. The goal of the present project was to analyse muscle development in Crustacean appendages, and to that end, monoclonal antibodies against arthropod muscle proteins were generated. One of these antibodies recognises certain isoforms of myosin heavy chain and strongly binds to muscle precursor cells in malacostracan Crustacea. We used this antibody to study myogenesis in two isopods, Porcellio scaber and Idotea balthica (Crustacea, Malacostraca, Peracarida), by immunohistochemistry. In these animals, muscles in the limbs originate from single muscle precursor cells, which subsequently grow to form multinucleated muscle precursors. The pattern of primordial muscles in the thoracic limbs was mapped, and results compared to muscle development in other Crustaceans and in insects.

  4. Using field data to assess the effects of pesticides on crustacea in freshwater aquatic ecosystems and verifying the level of protection provided by water quality guidelines.

    Science.gov (United States)

    Guy, Martha; Singh, Lucina; Mineau, Pierre

    2011-07-01

    The purpose of this study was to investigate how well single-species laboratory data predict real-world pesticide toxicity effects on Crustacea. Data from field pesticide exposures from experimental mesocosm and small pond studies were converted into toxicity units (TUs) by dividing measured pesticide concentrations by the L(E)C50 for Daphnia or acute 5% hazard concentration for Crustacea (HC5-C). The proportion of crustacean taxa significantly affected by the pesticide treatment, called the count ratio of effect, was used in logistic regression models. Of 200 possible logistic model combinations of the TUs, fate, physicochemical variables, and structural variables versus the count ratio of effect for the mesocosm data, the best model was found to incorporate log(TU HC5-C). This model was used to convert pesticide water quality guidelines from around the world into estimates of the proportion of crustacean taxa predicted to be impacted by exposure to a pesticide at the water quality guideline concentration. This analysis suggests 64% of long-term water quality guidelines and 88% of short-term pesticide water quality guidelines are not protective of the aquatic life they are designed to protect. We conclude that empirically derived data from mesocosm studies should be incorporated into water quality guideline derivation for pesticides where available. Also, interspecific differences in susceptibility should be accounted for more accurately to ensure water quality guidelines are adequately protective against the adverse effects of pesticide exposure. Copyright © 2011 SETAC.

  5. CARDISOMA ARMATUM (DECAPODA)

    African Journals Online (AJOL)

    armatum may be useful in food formulations involving beverages and meat products. Calcium recorded the ... analyzed for by employing the method reported by. Vanado Molybate and ... advantageous in terms of the shelf-life of the sample.

  6. 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

  7. Technique of culturing Procambarus Clakii in ponds of saline-alkaline wetland along the Yellow River%沿黄低洼盐碱地池塘主养克氏原螯虾技术

    Institute of Scientific and Technical Information of China (English)

    朱文锦; 祝少华; 刘佑臻

    2010-01-01

    @@ 克氏原螯虾(Procambarus clakii),俗称淡水小龙虾,英文名称为红沼泽螯虾(Red Swamp Crayfish).克氏原螯虾分类学上隶属于节肢动物门(Arthropoda)、甲壳纲(Crustacea)、十足目(Decapoda)、爬行亚目(Reptantia)、螯虾科(Cambaridae)、原螯虾属(Procambarus).

  8. 南美白对虾国外养殖发展概况及我国养殖现状、存在的问题与对策

    Institute of Scientific and Technical Information of China (English)

    王武; 黄凯

    2002-01-01

    @@ 一、国外南美白对虾养殖发展概况 南美白对虾,学名Penaeus(Lito Penaeus vanamei Boone).分类上隶属于节肢动物门(Arthropoda)、甲壳纲(Crustacea)、十足目(Decapoda)、游泳亚目(Natantia)、对虾科(Penaeidae)、对虾属(Penaeus)、Litopenaeus亚属.

  9. Grandes branquiópodos (Crustacea, Branchiopoda, Anostraca, Notostraca en la provincia de Málaga, España (año hidrológico 2012/2013

    Directory of Open Access Journals (Sweden)

    Ripoll Rodríguez, J.

    2014-03-01

    Full Text Available Large branchiopods (Crustacea, Branchiopoda, Anostraca, Notostraca from Málaga province, Spain (2012/2013 hydrological year This paper presents the occurrence of the large branchiopods detected during a survey carried out in the province of Málaga (Andalusia, southern Spain. Five species (Branchipus cortesi, Chirocephalus diaphanus, Streptocephalus torvicornis, Triops mauritanicus aggr. and Phallocryptus spinosa were recorded at 90 sampled wetlands.

  10. Spatial distribution of digestive proteinases in the midgut of the Pacific white shrimp (Litopenaeus vannamei) indicates the existence of endo-ectoperitrophic circulation in Crustacea.

    Science.gov (United States)

    Alexandre, Daniel; Ozório, Renata A; Derner, Roberto B; Fracalossi, Débora M; Oliveira, Gabriel B; Samuels, Richard I; Terra, Walter R; Silva, Carlos P

    2014-01-01

    The effect of dietary protein concentration on the spatial distribution of digestive proteinases in the shrimp Litopenaeus vannamei indicates the existence of endo-ectoperitrophic enzyme circulation in this species. Samples recovered from the midgut gland tissues, stomach contents, three different portions of the midgut and feces were used for quantitative and qualitative analyses of the composition and distribution of the digestive proteinases. Animals were divided into three different groups: (1) animals (controls) fed with a commercial 35% protein diet, (2) animals fed with a commercial diet supplemented with ovalbumin to a final protein concentration of 60%; (3) animals fed with an 80% protein diet. Quantitative determinations using different substrates and zymograms showed that increasing protein concentration in the diet alters the distribution of proteinases along the digestive tract. Composition of proteinases in the midgut gland, stomach contents, midgut sections and feces were similar, but not identical. Chymotrypsin and trypsin paralogues were identified in all enzyme sources in a concentration gradient along the midgut in the control shrimp, the expected distribution supporting the existence of a recycling mechanism. The occurrence of a peritrophic membrane in other Decapoda suggests that endo-ectoperitrophic circulation of digestive enzymes and nutrients may also occur in other crustaceans and also extends beyond the Insecta.

  11. Spatial patterns of Pisidium chilense (Mollusca Bivalvia and Hyalella patagonica (Crustacea, Amphipoda in an unpolluted stream in Navarino island (54° S, Cape Horn Biosphere Reserve

    Directory of Open Access Journals (Sweden)

    Patricio De Los Ríos Escalante

    2017-01-01

    Full Text Available The southern South American inland waters have many endemic species and some of them are considered as endangered for IUCN, that inhabits in unpolluted ecosystems, one of these ecosystems are the sub-Antarctic perennial forests located in the Cape Horn Biosphere Reserve at 54° S. The aim of the present study is to analyze the spatial patterns of Pisidium chilense Ituarte, 1999 (Mollusca Bivalvia and Hyalella patagonica (Cunningham, 1871 (Crustacea, Amphipoda in an unpolluted stream. Both species had aggregated spatial distribution, both have a negative binomial distribution pattern, and both are associated. The present results would agree with similar patterns in Patagonian rivers where both species coexist.

  12. 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.

  13. Crecimiento y reproducción del camarón Atya margaritacea (Decapoda: Atyidae en el Río Presidio, Sinaloa, México

    Directory of Open Access Journals (Sweden)

    Jesús Sánchez Palacios

    2008-06-01

    Full Text Available Se estudiaron el crecimiento y reproducción de de Atya margaritacea, con base en 542 organismos capturados en cinco sitios distribuidos desde la parte media de la cuenca hasta la desembocadura del río Presidio (Sinaloa, NW de México. La recolecta se realizó mediante el empleo de una red Surber, recolectándose organismos cuya longitud total y peso total variaron de 15 a 96 mm y 0.1 a 25.2 g respectivamente. La proporción macho:hembra fue 1.96:1 y los machos alcanzaron las mayores tallas y pesos. La relación entre la longitud total (Lt y el peso total (Pt se estableció mediante el modelo Pt = 1.02x10-5 (Lt3.2089 para los machos y por Pt = 2.29x10-5 (Lt3.0159 para las hembras. El crecimiento en machos resultó alométricamente positivo mientras que en hembras fue isométrico. La regresión entre la longitud total y longitud cefalotórax (Lc fue Log Lc = 1.1118 (Log Lt- 0.6087 en machos y Log Lc = 0.9945 (Log Lt- 0.4321 en hembras. El crecimiento relativo entre estas partes del cuerpo resultó alométrico positivo en machos e isométrico en hembras, indicando un claro dimorfismo sexual de estos organismos. Hembras ovígeras se presentaron en la época de lluvias (julio a noviembre. La fecundidad absoluta varió de 1 860 a 22 400 huevos en hembras de 43 y 59 mm de longitud y de 1.9 a 6.0 g de peso. La ecuación que relacionó el número de huevos con la longitud y peso, fue Fec = 8.3x10-7 (Lt5.8053 y Fec = 732 (Pt1.836 respectivamente.Growth and reproduction of the shrimp Atya margaritacea (Decapoda: Atyidae in Río Presidio, Sinaloa, Mexico. Some growth and reproduction parameters of the population of the shrimp Atya margaritacea in Presidio River (Sinaloa, NW Mexico were studied using 542 organisms collected with a Surber net in five sampling locations distributed from mid- to low river. Total lengths and gross weights ranged from 15 to 96 mm and 0.1 to 25.2 g. The male:female ratio was 1.96:1 and males had larger sizes and weights. The

  14. 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

  15. Molecular phylogeny of the crab genera Helice and Helicana (Crustacea, Decapoda) based on the partial sequences of mitochondrial 16S rRNA gene%厚蟹线粒体16S rRNA基因序列分析及系统发育研究

    Institute of Scientific and Technical Information of China (English)

    徐敬明; 孙翰昌; 孙世春

    2011-01-01

    对我国沿海天津厚蟹6个群体、侧足厚蟹4个群体、伍氏仿厚蟹2个群体和日本仿厚蟹1个群体的线粒体16S rRNA基因片段进行了序列测定;结合从GenBank下载的其他厚蟹序列,分析了厚蟹分子系统发育关系.除天津厚蟹丹东群体的2个个体16S rRNA基因片段长度为526 bp外,其他天津厚蟹和侧足厚蟹均为525 bp;除日照群体和丹东群体外,其他每个群体的个体之间没有序列差异,天津厚蟹和侧足厚蟹共有5个单倍型.伍氏仿厚蟹16S rRNA基因片段长度均为525 bp,群体、个体之间均无序列差异.日本仿厚蟹16S rRNA基因片段长度均为523 bp,个体之间无序列差异.其A,T,G,C含量只有略微的差异,A+T含量(72.3%~73.7%)明显高于G+C含量.4种厚蟹所有序列比对,在526 bp序列上共有变异位点36处和4处插入/缺失,其中简约信息位点26处,转换/颠换的平均值为2.8.在5个单倍型中,侧足厚蟹泉州、宁波群体的6个个体与天津厚蟹宁波、日照群体的4个个体的序列都相同,共享1个单倍型;而且5个单倍型之间的遗传距离很小,仅为0.19%~1.15%,表明二者为同一物种的不同形态类型.采用NJ法,ML法和MP法构建的厚蟹/张口蟹复合群系统进化树的拓扑结构基本一致.结果显示,天津厚蟹和侧足厚蟹的10个群体的5个单倍型和台湾厚蟹首先聚到一起,形成侧足厚蟹复合体后,再与三齿厚蟹聚为一支;日本仿厚蟹与德氏仿厚蟹先聚在一起,然后再与伍氏仿厚蟹聚为一支;均得到99%置信度的支持,表明厚蟹属蟹类和仿厚蟹属蟹类均为单系,支持将厚蟹亚属和仿厚蟹亚属分别提升为属.分子数据及系统树的拓扑结构亦支持将假厚蟹亚属和拟厚蟹亚属分别提升为属,以及形态学上将厚蟹/张口蟹复合群分为7个属的结论.%The partial sequences of mitochondrial 16S rRNA gene of Helice tientsinensis (six populations), H. Latimera (four populations), Helicana wuana (two populations) and H. Japonicaione population) from the coast of China were determined and subjected to phylogenetic analysis with the inclusion of other species of Helice and Helicana obtained from the GenBank. The length of sequence of Helice tientsinensis and H. Latimera was 525 bp, excluding 526 bp of two individuals from Dandong population of H. Tientsinensis. Five haplotypes were found in them. The lengths of sequence of Helicana wuana and H. Japon-ica were 525bp and 523bp respectively. There were no differences of sequence among individuals within populations of them, except Rizhao and Dandong populations. The A, T, G and C contents of them were similar, and the AT content(72. 3%~73. 7%)was higher than GC content. The resultant sequences of H. Tientsinensis, H. Latimera, H. Wuana and H. Japonica were 526bp long with 4 indels, of which 36 sites were variable and 26 sites were parsimoniously informative, and average transition/transversion ratio was 2.8. Among the five haplotypes, six individuals of H. Latimera from Quanzhou and Ningbo populations and four individuals of H. Tientsinensis from Ningbo and Rizhao populations shared one haplotype, and genetic distances among them were very smalK(0. 19% ~ 1. 15%), implying that they may represent different morphotypes of the same species. Molecular phylogenetic trees indicated that the genera Helice and Helicana were monophyletic respectively, the large net genetic distances between them supported that they were updated from subgenus to genus. The molecular data also supported that the Pseudohelice and Para-helice were updated from subgenus to genus, and Helice/'Chasmagnathus complex was divided into seven genera by morphology.

  16. 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)

  17. 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.

  18. Life on the beach for a sand crab (Emerita rathbunae (Decapoda, Hippidae: parasite-induced mortality of females in populations of the Pacific sand crab caused by Microphallus nicolli (Microphallidae

    Directory of Open Access Journals (Sweden)

    Juan Violante-González

    2016-09-01

    Full Text Available Parasites, by definition, can affect mortality of their host, making parasitism an important biotic determinant of animal population dynamics and community structure. Reduction in the number of larger, reproductive age females in populations of the Pacific sand crab, Emerita rathbunae (Decapoda, Hippidae, was observed in studies of the helminth community of this host. The aim of this study was to determine if high abundance of the metacercaria of the trematode, Microphallus nicolli (Microphallidae, causes mortality in this host. Females of E. rathbunae were collected from four sandy beaches in Guerrero State, Mexico, and helminths were collected from each crab. An analysis of variance (Anova was applied to these data in order to identify differences in abundance between sizes of crabs, and an analysis of covariance (Ancova was applied to identify differences in the abundance of metacercariae between locations. Parasite-related mortality was inferred by a decrease in abundance in older hosts. Linear and polynomial regressions of mean abundance of helminths (log x+1 transformed data vs. cephalothorax length of crabs were significant for the four populations of E. rathbunae, indicating increased mortality of older, more heavily infected female crabs and resultant removal from the population. Encapsulation and melanization of cysts by crabs was observed, indicating that an immune response by crabs also killed a portion of the cysts from subsequent exposures. Mortality of hosts through behavioral modification favoring transmission of highly infected crabs was suggested as the driving force behind this process.

  19. 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

  20. 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.

  1. 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.

  2. 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

    2013-07-01

    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.

  3. The water flea Daphnia magna (Crustacea, Cladocera) as a test species for screening and evaluation of chemicals with endocrine disrupting effects on crustaceans.

    Science.gov (United States)

    Tatarazako, Norihisa; Oda, Shigeto

    2007-02-01

    The water flea Daphnia magna (Crustacea, Cladocera) is a cyclical parthenogen, which can reproduce both by parthenogenesis and by sexual reproduction. With its ease of handling in the laboratory, several testing methods using D. magna exist for regulatory toxicity testing. Recently, several studies revealed that one of the major hormone groups in insects and crustaceans, juvenile hormones, are involved in the shift of reproductive mode from parthenogenesis to sexual reproduction (production of male neonates). Using offspring sex ratio as a new endpoint has made it possible to identify chemicals with juvenile hormone-like effects on crustaceans. The testing method using D. magna, in which offspring sex ratio is incorporated as a new endpoint, is now being proposed to the OECD as an enhanced version of the existing OECD Test Guideline 211: Daphnia magna reproduction test. No other clear-cut endpoint for identifying juvenile-hormone disrupting effects has ever been found in crustaceans than the induction of male neonates production in cladocerans. In this regard, it is expected that testing methods using D. magna are suitable for screening and risk assessment of chemicals with juvenile-hormone disrupting effects.

  4. 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.

  5. Five species of the family Cyproideidae (Crustacea: Amphipoda) from Japan, with the description of a new genus and two new species.

    Science.gov (United States)

    Ariyama, Hiroyuki

    2016-03-31

    Five species of the family Cyproideidae (Crustacea: Amphipoda) are described from shallow sea in Japan. Cyproidea liodactyla Hirayama, 1978 was collected from Kanagawa and Shizuoka Prefectures and Ariake Sea. Morphological character of the antenna 1 in these specimens is different from the original description. Examining the paratypes of C. liodactyla, the shape of the antenna 1 in the holotype is revealed to be abnormal. Cyproidea okinawensis sp. nov. was collected from Okinawa Island. Its morphological characters resemble C. liodactyla and C. robusta Ren, 2006; however, this new species is different from the former in the smaller eyes, the narrower coxa 5 and the coloration, and from the latter in the ovoid telson. Metacyproidea gen. nov. is established with M. makie sp. nov. from Hachijo Island in Tokyo Prefecture as its type species. This new genus resembles Cyproidea, especially in the peduncular article 2 of antenna 1 with a distinct distal tooth and the posterodorsal end of urosomites with a strong projection. However, Metacyproidea can be distinguished from Cyproidea by the coalesced urosomites 2-3 and the antenna 1 with a 10-16-articulated flagellum. Moolapheonoides acutifalcatus Kobayashi & Ishimaru, 2005 and Terepeltopes dolichorhunia Hirayama, 1983 were also collected from Wakayama and Fukui Prefectures and Kanagawa, Shizuoka and Yamaguchi Prefectures, respectively. A key to species of the family Cyproideidae in Japan is provided.

  6. Effect of ingested tungsten oxide (WOx) nanofibers on digestive gland tissue of Porcellio scaber (Isopoda, Crustacea): fourier transform infrared (FTIR) imaging.

    Science.gov (United States)

    Novak, Sara; Drobne, Damjana; Vaccari, Lisa; Kiskinova, Maya; Ferraris, Paolo; Birarda, Giovanni; Remškar, Maja; Hočevar, Matej

    2013-10-01

    Tungsten nanofibers are recognized as biologically potent. We study deviations in molecular composition between normal and digestive gland tissue of WOx nanofibers (nano-WOx) fed invertebrate Porcellio scaber (Iosopda, Crustacea) and revealed mechanisms of nano-WOx effect in vivo. Fourier Transform Infrared (FTIR) imaging performed on digestive gland epithelium was supplemented by toxicity and cytotoxicity analyses as well as scanning electron microscopy (SEM) of the surface of the epithelium. The difference in the spectra of the Nano-WOx treated and control cells showed up in the central region of the cells and were related to lipid peroxidation, and structural changes of nucleic acids. The conventional toxicity parameters failed to show toxic effects of nano-WOx, whereas the cytotoxicity biomarkers and SEM investigation of digestive gland epithelium indicated sporadic effects of nanofibers. Since toxicological and cytological measurements did not highlight severe effects, the biochemical alterations evidenced by FTIR imaging have been explained as the result of cell protection (acclimation) mechanisms to unfavorable conditions and indication of a nonhomeostatic state, which can lead to toxic effects.

  7. Distribución espacial y temporal del cangrejo Callinectes sapidus (Decapoda: Portunidae en la Bahía de Chetumal, Quintana Roo, México

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    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.

  8. Stomatopod Crustacea of Suriname

    NARCIS (Netherlands)

    Holthuis, L.B.

    1959-01-01

    The present report is based in the first place on material collected by the trawler “Coquette”, which, from April to August 1957, explored the offshore waters of Suriname and French Guiana from the mouth of the Nickerie River in the west to the Iles de Salut in the east. Most of the hauls were made

  9. (Crustacea) from Verlorenvlei

    African Journals Online (AJOL)

    1994-08-29

    Aug 29, 1994 ... history of the system has been initiated, in order to reveal the climatic, floristic .... pinata is a benthic species, devoid of all swimming powers. The population in ..... permanent freshwater pools and dams in the Eastern Cape.

  10. Stomatopod Crustacea of Suriname

    NARCIS (Netherlands)

    Holthuis, L.B.

    1959-01-01

    The present report is based in the first place on material collected by the trawler “Coquette”, which, from April to August 1957, explored the offshore waters of Suriname and French Guiana from the mouth of the Nickerie River in the west to the Iles de Salut in the east. Most of the hauls were made

  11. Gut bacterial community structure (Porcellio scaber, Isopoda, Crustacea) as a measure of community level response to long-term and short-term metal pollution.

    Science.gov (United States)

    Lapanje, Ales; Rupnik, Maja; Drobne, Damjana

    2007-04-01

    Prokaryotes are of high importance in the assessment of environmental pollution effects. Due to fast responsiveness of bacterial communities to environmental physicochemical factors, it is difficult to compare results of bacterial community investigations on the temporal and spatial scale. To reduce the effects of variable physicochemical environmental conditions on bacterial microbiota when investigating the specific impact of contaminants on bacterial communities, we investigated the bacterial community in the gut of terrestrial isopods (Porcellio scaber, Isopoda, Crustacea) from clean and metal-polluted environments. Animals were collected from a chronically mercury-polluted site, a chronically multiple metal-(Cd, Pb, Zn) polluted site, and two reference sites. In addition, animals from an unpolluted site were laboratory exposed to 5 microg Hg/g food in order to compare the effect of acute and chronic Hg exposure. The bacterial gut microbiota was investigated by temporal temperature gradient gel electrophoresis (TTGE) and clone library construction based on polymerase chain reaction amplified 16S rRNA genes. The major bacterial representatives of the emptied gut microbiota in the animals from the chronically polluted environments seemed not affected when analyzed by TTGE. The detailed bacterial community structure investigated by 16S rRNA clone library construction, however, showed that the community from the Hg-polluted site also was affected severely (242.4 operational taxonomic units [OTU] in the polluted and 650.6 OTU in the unpolluted environment). When animals were acutely exposed to mercury, changes of bacterial community structures already were seen on TTGE profiles and no additional analysis was needed. We suggest the use of P. scaber gut bacterial community structure as a measure of effects caused by both long- and short-term exposure to pollution.

  12. Alona iheringula Sinev & Kotov, 2004 (Crustacea, Anomopoda, Chydoridae, Aloninae: life cycle and DNA barcode with implications for the taxonomy of the Aloninae subfamily.

    Directory of Open Access Journals (Sweden)

    Erika dos Santos Silva

    Full Text Available Knowledge of reproductive rates and life cycle of the Cladocera species is essential for population dynamic studies, secondary production and food webs, as well as the management and preservation of aquatic ecosystems. The present study aimed to understand the life cycle and growth of Alona iheringula Kotov & Sinev, 2004 (Crustacea, Anomopoda, Chydoridae, a Neotropical species, as well as its DNA barcoding, providing new information on the Aloninae taxonomy. The specimens were collected in the dammed portion of the Cabo Verde River (21°26'05″ S and 46°10'57″ W, in the Furnas Reservoir, Minas Gerais State, Brazil. Forty neonates were observed individually two or three times a day under controlled temperature (25±1°C, photoperiod (12 h light/12 h dark and feeding (Pseudokirchneriella subcapitata at a concentration of 105 cells.mL-1 and a mixed suspension of yeast and fish feed in equal proportion. Individual body growth was measured daily under optical microscope using a micrometric grid and 40× magnification. The species had a mean size of 413(±29 µm, a maximum size of 510 µm and reached maturity at 3.24(±0.69 days of age. Mean fecundity was 2 eggs per female per brood and the mean number of eggs produced per female during the entire life cycle was 47.6(±6.3 eggs per female. The embryonic development time was 1.79(±0.23 days and the maximum longevity was 54 days. The species had eight instars throughout its life cycle and four instars between neonate and primipara stage. The present study using molecular data (a 461 bp smaller COI fragment demonstrated a deep divergence in the Aloninae subfamily.

  13. Latitudinal patterns in the diversity of two subgenera of the genus Daphnia O.F. Müller (Crustacea: Cladocera: Daphniidae).

    Science.gov (United States)

    Popova, Ekaterina Y; Kotov, Alexey A

    2013-11-12

    Daphnia O.F. Müller (Crustacea: Cladocera: Daphniidae) is an important model in biology. It was concluded earlier that subgenus Daphnia s.str. occurs mainly in the northern hemisphere, subgenus Daphnia (Ctenodaphnia) in the southern hemisphere, which could suggest that: (1) the subgeneric differentiation is correlated with the Laurasia-Gondwanaland subdivision and (2) D. (Ctenodaphnia) is a taxon of Gondwanian origin. Some authors even discussed mechanisms of maintaince of the "ancient subgeneric north-south split", regarding such a pattern as paradoxical. But both molecular clock calculations and fossils of both subgenera from the Jurassic/Cretaceous boundary of Mongolia compromise such ideas and suggest an earlier, Pangaean, differentiation of the subgenera.        We discuss the distribution of Daphnia worldwide based on recent literature. Our analysis covers literature data on all described and on undescribed taxa revealed by genetical methods. Distributional data were associated with five main zones: southern cold (I), southern temperate (II), tropical (III), northern temperate (IV), and northern cold (V) zone. We found no "subgeneric north-south split": the distribution of Daphnia s.str. is dissymmetric between the hemispheres (antipolar), while that of Ctenodaphnia is sub-symmetric (bipolar). We suggest that both patterns are not of Mesozoic, but of Cenozoic origin. Mesozoic differentiation of the subgenera does not contradict a recent origin of the extant species, as found in e.g. Notostraca. A superficially attractive hypothesis about a Gondwanian origin of a taxon (Daphnia (Ctenodaphnia)) therefore did not pass the test of the fossil records. In addition, we agree with the opinion that an antipolar is only a variant of a bipolar pattern, as a result of an extinction in the southern hemisphere, and that these patterns are mid-late Cenozoic instead of Mesozoic.

  14. Nervous system development in the fairy shrimp Branchinella sp. (Crustacea: Branchiopoda: Anostraca): Insights into the development and evolution of the branchiopod brain and its sensory organs.

    Science.gov (United States)

    Frase, Thomas; Richter, Stefan

    2016-11-01

    Using immunohistochemical labeling against acetylated a-tubulin and serotonin in combination with confocal laser scanning microscopy and 3D-reconstruction, we investigated the temporary freshwater pond inhabitant Branchinella sp. (Crustacea: Branchiopoda: Anostraca) for the first time to provide detailed data on the development of the anostracan nervous system. Protocerebral sense organs such as the nauplius eye and frontal filament organs are present as early as the hatching stage L0. In the postnaupliar region, two terminal pioneer neurons grow from posterior to anterior to connect the mandibular neuromeres. The first protocerebral neuropil to emerge is not part of the central complex but represents the median neuropil, and begins to develop from L0+ onwards. In stage L3, the first evidence of developing compound eyes is visible. This is followed by the formation of the visual neuropils and the neuropils of the central complex in the protocerebrum. From the deutocerebral lobes, the projecting neuron tract proceeds to both sides of the lateral protocerebrum, forming a chiasma just behind the central body. In the postnaupliar region, the peripheral nervous system, commissures and connectives develop along an anterior-posterior gradient after the fasciculation of the terminal pioneer neurons with the mandibular neuromere. The peripheral nervous system in the thoracic segments consists of two longitudinal neurite bundles on each side which connect the intersegmental nerves, together with the ventral nervous system forming an orthogon-like network. Here, we discuss, among other things, the evidence of a fourth nauplius eye nerve and decussating projecting neuron tract found in Branchinella sp., and provide arguments to support our view that the crustacean frontal filament (organ) and onychophoran primary antenna are homologous. J. Morphol. 277:1423-1446, 2016. © 2016 Wiley Periodicals, Inc.

  15. 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.

  16. 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

  17. Influência da Serra do Mar na distribuição e biologia de Aeglidae (Crustacea, Anomura) na porção leste do Estado do Paraná

    OpenAIRE

    2013-01-01

    Resumo: Um estudo sobre os padrões de distribuição dos eglídeos (Crustacea, Anomura, Aeglidae) com ocorrência no Estado do Paraná e a variação intraespecífica morfológica de Aegla schmitti dentre populações isoladas pelo conjunto de montanhas da Serra do Mar foi realizado. A análise do padrão de distribuição foi realizado principalmente com base em visitas à coleções científicas, porém coletas adicionais foram realizadas, especialmente nas bacias hidrográficas dos rios Iguaçu, Ribeira do Igua...

  18. Efeito da anoxia e da recuperação sobre o metabolismo intermediário do caranguejo Chasmagnathus granulata alimentado com dieta rica em carboidratos ou proteínas

    OpenAIRE

    Letícia Souza dos Santos

    2004-01-01

    O caranguejo Chasmagnathus granulata (Crustacea, Decapoda, Grapsidae) apesar de ter evoluído de formas marinhas é uma espécie tipicamente estuarina, sendo dificilmente encontrada no mar. Em seu hábitat, o caranguejo permanece longos períodos fora da água, sendo considerado um animal tipicamente semiterrestre. As respostas fisiológicas às variações das concentrações de O2 incluem alterações significativas na ventilação, na circulação, no metabolismo e nas propriedades de afinidade da hemociani...

  19. The story of immigration of Eriocheir sinensis in Europe and USA%中华绒螯蟹欧洲、美国的移植

    Institute of Scientific and Technical Information of China (English)

    邹曙明; 李思发

    2002-01-01

    @@ 中华绒螯蟹(Eri0cheir sinensis)属节肢动物门(Arthropoda)、甲壳纲(Crustaceae)、十足目(Decapoda)、方蟹科(Grapsidae)、绒螯蟹属(Eriocheir),自然分布于南至中国福建闽江(~26°N),北至朝鲜半岛(~45°N),西达离长江口约1400km的重庆,由于人为因素,广东珠江流域也有少量存在(图1)[1].

  20. Biodiversité de l'Indo-Pacifique tropical français 2514 espèces de crustacés décapodes et stomatopodes

    OpenAIRE

    Poupin, Joseph

    2010-01-01

    Un fichier PDF, accompagné d'un listing des données d'inventaire sous la forme d'un fichier EXCEL.; A compilation of species of Crustacea Decapoda and Stomatopoda of the tropical French overseas territories, including Mayotte, Reunion, New Caledonia, Wallis & Futuna, French Polynesia and Clipperton, over approximately 200 years (1829 to October 2010). The names of the species and the supra-specific classification follow WoRMS (http://www.marinespecies.org/). In total, 2514 valid species are r...

  1. Efeito da composição iônica da água do mar artificial no desenvolvimento de larvas de Macrobrachium rosenbergii - DOI: 10.4025/actascibiolsci.v20i0.4484 Effect of artificial seawater ionic composition on the development of Macrobrachium rosenbergii (De Man, 1879 [Crustacea, Decapoda] at the larval stage II - DOI: 10.4025/actascibiolsci.v20i0.4484

    Directory of Open Access Journals (Sweden)

    Margarete Mallasen

    1998-07-01

    Full Text Available Avaliou-se a importância da presença na água dos íons Ca2+, K+, HCO3-, Br-, Sr2+, Mn2+, HPO42-, Li+, MoO42-, S2O32-, Al3+, Rb+, Zn2+, Co2+ e Cu2+ para o desenvolvimento do Macrobrachium rosenbergii no estágio larval II. Aplicou-se um teste de inanição, que consistiu na estocagem das larvas em béqueres contendo 15ml de água salobra (12‰, de diferentes composições iônicas. A cada 8 horas contou-se o número de larvas vivas e calculou-se o tempo médio de vida em todos os tratamentos. Os elementos Al3+, Rb+, Zn2+, Co2+, Cu2+, Sr2+, Mn2+, HPO42-, Li+, MoO42- e S2O32- não influenciaram o tempo de vida das larvas. O K+ e o Ca2+ foram os íons mais importantes para o desenvolvimento das larvas, seguidos pelo Br- e pelo HCO3-, respectivamente, a presença desses íons no meio é indispensável e as larvas devem apresentar mecanismos eficientes de absorção desses elementos.The importance of the ions Ca2+, K+, HCO3-, Br-, Sr2+, Mn2+, HPO42-, Li+, MoO42-, S2O32-, Al3+, Rb+, Zn2+, Co2+ and Cu2+ in water on the development of Macrobrachium rosenbergii at the larval stage II was evaluated. A starvation test was applied. It consisted in keeping larvae of M. rosenbergii in beakers containing 15ml of brackish water (12‰ with different ionic compositions. In order to estimate average life time, larvae which survived the treatment were counted every eight hours. Elements Al3+, Rb+, Zn2+, Co2+,Cu2+, Sr2+, Mn2+, HPO42-, Li+, MoO4M2- and S2O32 were not effective on the larvae life time, whereas K and Ca2+ were the most important ions for larvae development, followed by Br- and HCO3-, respectively. These ions are indispensable in water and larvae must have an efficient mechanism to absorb them.

  2. [Proceedings of the 5th Symposium on Mesozoic and Cenozoic Decapod Crustaceans, Krakow, Poland, 2013: A tribute to Pál Mihály Müller / R.H.B. Fraaije, M. Hyžný, J.W.M. Jagt, M. Krobicki & B.W.M. van Bakel (eds.)]: New data on mid-Cretaceous dromioid crabs (Crustacea, Decapoda, Brachyura) from northwest Germany and southwest Iran

    NARCIS (Netherlands)

    Jagt, J.W.M.; Bakel, van B.W.M.; Fraaije, R.H.B.; Neumann, C.

    2014-01-01

    A single, slightly laterally compressed carapace of a dromioid crab from the middle/upper Albian part of the Kazhdumi Formation in the Hamiran area (Hormozgan Province, southwest Iran) is described as a new species, which is tentatively assigned to the brachyuran genus Distefania Checchia-Rispoli, 1

  3. 瓯江口海域夏、秋季口足目和十足目虾类分布特征%Distribution of Hoplocarida and Decapoda shrimps in Oujiang estuary, East China Sea

    Institute of Scientific and Technical Information of China (English)

    徐兆礼; 沈盎绿; 李新正

    2009-01-01

    采用2007年6月和9月瓯江口海域2个航次的渔业资源调查资料,研究瓯江口海域甲壳动物口足目(Hoplocarida)和十足目(Decapoda)中虾类的资源密度、种类组成和物种多样性等分布,探讨优势种、地形地貌、水团、温度和盐度等因素变化对这些分布的影响.结果表明,在2次拖网调查中,共鉴定口足目2种和虾类17种.口虾蛄(Oratosquilla oratoria)和哈氏仿对虾(Parapenaeopsis hardwickii)是6月的关键种,口虾蛄是9月的关键种.6月和9月2类优势甲壳动物平均质量密度分别为41.14 kg/km2和32.36 kg/km2,尾数密度为18.41×103ind/km2和10.66×103ind/km2.质量密度与尾数密度分布趋势一致,即调查水域东部高于西部,南部高于北部.6月,种问分布较均匀,物种数多,多样性指数值(H')较高;9月,在群岛外侧,由于口虾蛄在质量密度上形成单一优势种,导致质量多样性指数下降;但在尾数密度上,种间分布较均匀,尾数多样性指数值明显高于质量多样性指数值.无论是在6月还是9月,高密度区均出现在瓯江口洞头群岛外侧,特别是东南部受台湾暖流影响的海域.瓯江北口外的冲淡水水团是形成瓯江口北侧口足目和十足目虾类密度、种数和多样性低的重要原因.研究结果表明,瓯江冲淡水势力的季节变化是影响瓯江订海域口足目和虾类种类和多样性分布的主要水文因素.[中国水产科学,2009,16(1):104-112

  4. 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.

  5. Morfologia externa de Parastacus brasiliensis (Decapoda, Parastacidae

    Directory of Open Access Journals (Sweden)

    Ana Cristina M. Horn

    2008-03-01

    Full Text Available Parastacus brasiliensis (von Martens, 1869 é um lagostim de água doce endêmico da região meridional brasileira, ocorrendo nas bacias que formam o estuário do Guaíba, na depressão central do Estado do Rio Grande do Sul. O objetivo deste estudo é descrever e ilustrar a morfologia externa e a distribuição dos diferentes tipos de setas nos apêndices de exemplares adultos de P. brasiliensis. Em laboratório, os exemplares foram dissecados e detalhes da organização morfológica foram descritos e ilustrados com auxílio de câmara clara adaptada ao estereomicroscópio. Microscopia eletrônica de varredura foi utilizada para um melhor detalhamento no estudo das setas. Os resultados obtidos foram comparados com outras espécies de lagostins e com estágios juvenis de P. brasiliensis. Os tipos de setas e o padrão de distribuição observados são similares ao encontrado em Austropotamobius pallipes (Lereboullet, 1858. Diferenças foram encontradas no basipodito e no coxopodito do primeiro maxilípodo e na primeira maxila de P. brasiliensis, onde setas serradas são substituídas por formas plumodenticuladas e multidenticuladas.

  6. 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

  7. Species Composition, Temporal and Spatial Distributions and Diversity of Hoplocarida and Decapoda Shrimps in Summer and Winter in Sanmen Bay%三门湾海域冬夏季口足目和十足目虾类的种类组成、时空分布及多样性分析

    Institute of Scientific and Technical Information of China (English)

    赵蒙蒙; 徐兆礼

    2011-01-01

    Based on the data from two oceanographic survey in the Sanmen bay during Dec. 2007 and Jun. 2008,this paper discussed the population density of Hoplocarida and Decapoda shrimps in winter and summer, species dominancy and diversity, involved in some impact factors such as background of topography and geomorphy, as well as hydrological features. Results showed that eurythermal and eurysaline shrimp species prevailed in Sanmen Bay. Shrimp specie number in summer was higher than the one in winter, as well as the weight and number densities, which were 93.32 kg/km2and 31.97 kg/km2 ,32.34 × 103 ind/km2 and 19.32× 103ind/km2respectively. Parapenaeopsis tenella was the most important shrimp species in winter and Oratosquilla oratoria in summer according to index of relative significance (IRI). The species component in summer was more homogeneous than it in winter, so the weight and diversity index H'in winter( 1.58, 1.33 ) were both lower than those in summer( 1.78, 2. 18). The water temperature outside the bay mouth is relatively higher in winter so more shrimp species are found here. While in summer, the bay mouth is the intersection by waters with different salinities, therefore shrimp species is rich. In addition, the Decapoda shrimp species in Sanmen Bay reach 25.00% to the total shrimp species in Zhejiang offshore, which means specie richness in bay is much lower comparing with that in Zhejiang offshore.%根据2007年12月和2008年6月三门湾海域的2个航次的渔业资源调查资料,研究三门湾海域口足目与十足目中虾类在冬季和夏季的密度、优势种及多样性的时空分布,并结合该调查海区的地形地貌和水文等因素对虾类的分布进行分析.结果表明,三门湾海域虾类以广温、广盐种为主,其夏季种类数高于冬季,且夏季虾类质量和尾数密度均值亦高于冬季,夏季与冬季的虾类质量分别为93.32 kg/km2和31.97 kg/km2,而尾数密度分别为32.34×103ind/km2

  8. 东平湖日本沼虾的生物学研究

    Institute of Scientific and Technical Information of China (English)

    董俊; 李秀启

    2010-01-01

    @@ 日本沼虾(Macrobrachium nipponense),俗称青虾、河虾,在动物分类学上隶属于节肢动物门(Arthropoda)、甲壳纲(Crustacea)、十足目(Decapoda)、长臂虾科(Palaemonidae)、沼虾属(Macrobrachium).主要分布于我国与日本,具有食性杂、生长快、繁殖力高、抗病能力强等特点,是目前淡水养殖业中重要的养殖对象和最有发展前途的品种之一.

  9. Control on commou disease of Macyobrachium nipponnensis%日本沼虾常见疾病与防治

    Institute of Scientific and Technical Information of China (English)

    吴惠仙; 薛俊增; 俞宏

    2002-01-01

    @@ 日本沼虾(Macrobrachium nipponnensic),又称青虾、河虾,隶属于节肢动物门(Arthropoda)、甲壳纲(Crustacea)、十足目(Decapoda)、长臂虾科(Palaemonidae)、沼虾属(Macrobrachium),是我国重要的淡水养殖虾类.六十年代中期开始发展青虾养殖业,至八十年代末才开始步入发展盛期.随着高密度集约化养殖模式的发展,加上饲养管理方法尚欠科学,水质环境较差,导致近年来青虾病害蔓延扩大,常引发大面积死亡,造成极大的经济损失. 1 黑鳃病

  10. 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...

  11. 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

  12. Die Gattung Stenothoe (Crustacea, Amphipoda) im Mittelmeer

    NARCIS (Netherlands)

    Krapp-Schickel, Gertraud

    1976-01-01

    Ausgangssituation dieser Untersuchung war die Kenntnis von 11 nominellen Stenothoe-Arten im Mittelmeer. Von diesen wurde St. bosphorana Sowinski, 1898, seit der Beschreibung nicht mehr wiedergefunden, von St. dactylipotens Chevreux, 1908, kannte man nur das ♀, schließlich waren die Arten im Komplex

  13. The cavernicolous Oniscidea (Crustacea: Isopoda of Portugal

    Directory of Open Access Journals (Sweden)

    Ana Sofia P.S. Reboleira

    2015-12-01

    Full Text Available 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 from caves of mainland Portugal, including data from the literature and new material, are listed, revealing new biodiversity patterns. Twenty-seven species, belonging to 15 genera and six families, are known, of which 16 species are considered to be exclusively from subterranean ecosystems, i.e., troglobionts. Trichoniscidae is the most diverse family. Seven species in the family Trichoniscidae and one species in the family Styloniscidae are described as new (all with Reboleira & Taiti as authors: Trichoniscoides bellesi sp. nov. from the Montejunto Massif; T. sicoensis sp. nov. from the Sicó Massif; Metatrichoniscoides salirensis sp. nov. from the typhonic valley of Caldas da Rainha; Troglonethes olissipoensis sp. nov. from the Lisbon Peninsula; T. arrabidaensis sp. nov. from the Arrábida Massif; Miktoniscus longispina sp. nov. from the Sicó Massif and Cesaredas Plateau; Moserius inexpectatus sp. nov. from the Estremenho Massif; and Cordioniscus lusitanicus sp. nov. from Alentejo and Algarve, the southernmost provinces of Portugal. The subgenus Trogleluma Vandel, 1946 (Armadillidiidae is raised to genus level. In this geographic region terrestrial isopods are the richest group of cave-adapted animals.

  14. A transgenerational endocrine signaling pathway in Crustacea.

    Directory of Open Access Journals (Sweden)

    Gerald A LeBlanc

    Full Text Available BACKGROUND: Environmental signals to maternal organisms can result in developmental alterations in progeny. One such example is environmental sex determination in Branchiopod crustaceans. We previously demonstrated that the hormone methyl farnesoate could orchestrate environmental sex determination in the early embryo to the male phenotype. Presently, we identify a transcription factor that is activated by methyl farnesoate and explore the extent and significance of this transgenerational signaling pathway. METHODOLOGY/PRINCIPAL FINDINGS: Several candidate transcription factors were cloned from the water flea Daphnia pulex and evaluated for activation by methyl farnesoate. One of the factors evaluated, the complex of two bHLH-PAS proteins, dappuMet and SRC, activated a reporter gene in response to methyl farnesoate. Several juvenoid compounds were definitively evaluated for their ability to activate this receptor complex (methyl farnesoate receptor, MfR in vitro and stimulate male sex determination in vivo. Potency to activate the MfR correlated to potency to stimulate male sex determination of offspring (pyriproxyfen>methyl farnesoate>methoprene, kinoprene. Daphnids were exposed to concentrations of pyriproxyfen and physiologic responses determined over multiple generations. Survivial, growth, and sex of maternal organisms were not affected by pyriproxyfen exposure. Sex ratio among offspring (generation 2 were increasingly skewed in favor of males with increasing pyriproxyfen concentration; while, the number of offspring per brood was progressively reduced. Female generation 2 daphnids were reared to reproductive maturity in the absence of pyriproxyfen. Sex ratios of offspring (generation 3 were not affected in this pyriproxyfen lineage, however, the number of offspring per brood, again, was significantly reduced. CONCLUSIONS: Results reveal likely components to a hormone/receptor signaling pathway in a crustacean that orchestrates transgenerational modifications to important population metrics (sex ratios, fecundity of females. A model is provided that describes how these signaling processes can facilitate population sustainability under normal conditions or threaten sustainability when perturbed by environmental chemicals.

  15. 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...... provinces of Portugal. The subgenus Trogleluma Vandel, 1946 (Armadillidiidae) is raised to genus level. In this geographic region terrestrial isopods are the richest group of cave-adapted animals....

  16. 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...

  17. Siphonoecetini Just, 1983 (Crustacea, Amphipoda, Ischyroceridae) 10

    DEFF Research Database (Denmark)

    Just, Jean

    2012-01-01

    Two new genera and eight new species of bubocorophiid Siphonoecetini are described from north-eastern and northern Australia: Belkginoecetes bullockyensis gen. et sp. nov. B. cooee sp. nov. (type species), B. darwiniense sp. nov., B. fleurae sp. nov., B. solea sp. nov., B. springthorpei sp. nov.,...

  18. 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 thi

  19. 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

  20. Crescimento de Aegla manuinflata (Decapoda, Anomura, Aeglidae em ambiente natural

    Directory of Open Access Journals (Sweden)

    André Trevisan

    2011-12-01

    Full Text Available O presente trabalho teve como objetivo avaliar o crescimento de Aegla manuinflata Bond-Buckup & Santos, 2009 em ambiente natural. Para isso foram realizadas coletas mensais de abril de 2006 a maio de 2007 no arroio Passo Taquara, no município de São Pedro do Sul, Rio Grande do Sul, Brasil. Os organismos foram coletados utilizando armadilhas plásticas e puçá. Os espécimes foram sexados e tiveram mensurado o comprimento do cefalotórax (CC, em seguida foram devolvidos ao córrego. O crescimento foi avaliado utilizando o modelo de von Bertalanffy. As curvas de crescimento do cefalotórax, estimadas para machos e fêmeas, são descritas pelas seguintes equações Ct = 28,00 [1 - e-0,0047(t+10,63] e Ct = 25,16 [1 - e-0,0051(t+17,65], respectivamente. Os machos atingem tamanhos maiores que as fêmeas. A longevidade foi estimada em três anos para os machos e dois anos e meio para as fêmeas.

  1. Hermit Crabs (Decapoda: Anomura: Paguridea) from the Seychelles

    NARCIS (Netherlands)

    McLaughlin, P.A.; Hogarth, P.J.

    1998-01-01

    A report on the hermit crabs collected during the Netherlands Seychelles Expedition, 1992-1993, supplemented by materials collected for Enterprise Oil and examined by one of the authors. Twentyseven species, representing three families, are recognized, including one new genus and four new species.

  2. Cymonomid crabs of the MAINBAZA Expedition (Decapoda: Brachyura).

    Science.gov (United States)

    Ahyong, Shane T

    2014-06-23

    Cymonomid crabs collected from the Mozambique Channel off Madagascar by the 2011 MAINBAZA Expedition are reported. Two species of Cymonomus A. Milne Edwards, 1880, are represented, of which one is new to science and the other, C. valdiviae Lankester, 1903, is rediscovered, being previously known only from the holotype. Three species of Cymonomidae are now known from the western Indian Ocean, including C. trifurcus Stebbing, 1920, from South Africa. 

  3. Estructura del aparato reproductor masculino de Uca uruguayensis (Decapoda, Ocypodidae)

    OpenAIRE

    Cuartas,Elena Irene; Petriella,Ana María

    2010-01-01

    The structure of the male reproductive tract was described in Uca uruguayensis Nobili, 1901, by using histological methods, scanning electron microscopy techniques, and stereoscopic observations of fresh material. The aim of this work was to establish the functional changes associated with sexual maturation. The morphology of the first (G1) and second (G2) pair of gonopods was described. The male reproductive tract consists of paired organs: testes, and tubular and convoluted vas deferens (VD...

  4. Concentrações de amônia, nitrito e nitrato em larvicultura do camarão Macrobrachium rosenbergii (De Man, realizada em sistema fechado com água salobra natural e artificial Ammonia, nitrite and nitrate concentrations in a recirculating Macrobrachium rosenbergii (De Man hatchery, performed with natural and artificial brackish water

    Directory of Open Access Journals (Sweden)

    Wagner Cotroni Valenti

    2002-04-01

    Full Text Available Avaliou-se o efeito da água salobra natural e artificial e da sua utilização em dois cultivos consecutivos sobre as concentrações de amônia, nitrito e nitrato, em sistema fechado de larvicultura de M. rosenbergii (Crustacea, Decapoda. A amônia oscilou entre 1,1 e 74,0 µg/l e o nitrito entre e 1,1 e 34,6 µg/l; estes não diferiram entre os tipos de água analisados. A concentração de nitrato (N aumentou ao longo do tempo (T de forma similar na água natural e artificial, seguindo um modelo linear (N = 0,241T – 0,734. Os resultados indicaram que a água salobra artificial não alterou o processo de nitrificação, tampouco o comportamento das principais variáveis ambientais. A reutilização da água também não produziu nenhum efeito negativo sobre essas variáveis. A fórmula de água do mar artificial aqui apresentada pode ser, portanto usada em sistemas de recirculação para a produção de pós-larvas de M. rosenbergii em até dois cultivos consecutivos.Variations of ammonia, nitrite and nitrate in a recirculating M. rosenbergii (Crustacea, Decapoda hatchery, reusing natural and artificial brackish water, in two successive cultures, were studied. Ammonia and nitrite values oscillated between 1.1 to 74.0 µg/l and 1.1 to 34.6 µg/l, respectively, and did not differ among the tested water types. Nitrate concentrations (N increased similarly with time (T, according to a linear model (N = 0,241T – 0,734 with both natural and artificial water. Data suggested that the use and reuse of the artificial water did not affect the nitrification process. Therefore, it can be used in recirculating systems for M. rosenbergii hatchery.

  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. Annotated list of marine alien species in the Mediterranean with records of the worst invasive species

    Directory of Open Access Journals (Sweden)

    A. ZENETOS

    2012-12-01

    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

  7. New data on Gaidropsarus granti (Regan, 1903 (Gadiformes: Lotidae from the Mediterranean Sea, with emphasis on its parasites

    Directory of Open Access Journals (Sweden)

    Antonio Pais

    2008-09-01

    Full Text Available One adult male Azores rockling Gaidropsarus granti was captured by trammel nets at a depth of about 250 m near the coast of Arbatax (Sardinia, Italy in early March 2007. This new report confirms a wide bathymetric range for this species. Macroscopic and microscopic analysis of the gonad showed a spent testis at a postspawning stage, with a weak residual spermatogenetic activity. Several body parts of Natantia (Crustacea: Decapoda were detected in its stomach contents. Different developmental stages of 91 parasite specimens belonging to Arthropoda (Gnathiidae and Nematoda (Anisakidae, Cystidicolidae and Philometridae were found in its mouth and gills, and body cavity, respectively. Myxozoan spores were found in the gallbladder. Male and female nematodes of the genus Ichthyofilaria are reported for the first time from the Mediterranean Sea, and a very rare male of this genus is reported for the second time in the world. Parasitological results indicated that this Atlantic migrant probably entered the Mediterranean as an adult, suggesting for a non-indigenous species the possibilities of entering with natural parasites and/or acquiring native parasites in the introduced range.

  8. Responses of Crustaceans to Contaminant Exposure: a Holistic Approach

    Science.gov (United States)

    Hebel, D. K.; Jones, M. B.; Depledge, M. H.

    1997-02-01

    Typically, the sublethal effects of exposure to environmental contaminants are assessed by measuring the responses of one, or few, biochemical or physiological systems within organisms. An individual's survival potential, however, is determined by the integrated phenotypic response of all its systems working in concert. This concept is illustrated here by reviewing the repertoire of responses at several levels of organization (from the molecular to the behavioural) available to the common shore crab, Carcinus maenas(L.) (Crustacea: Decapoda), during exposure to water-borne copper. Behavioural responses may include avoidance reactions, changes in feeding and mating behaviour, as well as altered locomotory activity. Physiological responses are manifest as alterations in iono- and osmoregulation, circulation and respiration. Cellular responses are reflected in ultrastructural changes, lysosomal alterations, induction of metallothionein and stress proteins, and alterations in the activity of enzymes. Particular attention is focused on the integrated response of the gill since it represents the primary target for water-borne contaminants. It is concluded that to gain a holistic view of the impact of chemical exposure on organisms, the simultaneous measurement of numerous biological variables in a multi-system approach is required. This permits the determination of intra- and inter-specific variability in the repertoire of responses of organisms to chemicals (and other stressors), enabling potential impacts on populations and communities to be better assessed.

  9. 南美白对虾国外养殖发展概况及我国养殖现状、存在的问题与对策

    Institute of Scientific and Technical Information of China (English)

    黄凯; 王武

    2002-01-01

    @@ 1 国外南美白对虾养殖发展概况 南美白对虾,学名Penaeus.(Lito Penaeus)vanamei Boone.分类上隶属于节肢动物门(Arthropoda)、甲壳纲(Crustacea)、十足目(Decapoda)、游泳亚目(Natantia)、对虾科(Penaeidae)、对虾属(Penaeus)、Litopenaeus亚属.南美白对虾(Penaeus Vannamei)原产于中、南太平洋海岸水域秘鲁(Peru)北部至墨西哥桑诺拉(Sonor),该虾繁殖周期较长,在厄瓜多尔(Ecaudor)北部沿海的繁殖高峰一般在3月到9月,每年3月虾苗在沿岸一带大量出现,延续时间可达8个月,分布范围可延展到南部的圣·帕勃罗湾(San Pablo),南部的秘鲁中部沿海地带,繁殖高峰一般12月至翌年的4月.这些时期也是当地沿海岸捕捞虾苗的黄金季节.

  10. The spelling of the name Sarothrogammarus (Crustacea, Amphipoda)

    NARCIS (Netherlands)

    Stock, Jan H.

    1972-01-01

    In my recent revision of the Sarothrogammarus-group (Bijdr. Dierk., 41: 94—129, 1971), I consistently used the spelling Sarathrogammarus. Professor S. Ruffo, of Verona, kindly pointed out to me that the original spelling of the name is Sarothrogammarus (see Martynov, 1935, Trav. Inst. zool. Acad. Se

  11. Cryptic species in putative ancient asexual darwinulids (Crustacea, Ostracoda.

    Directory of Open Access Journals (Sweden)

    Isa Schön

    Full Text Available BACKGROUND: Fully asexually reproducing taxa lack outcrossing. Hence, the classic Biological Species Concept cannot be applied. METHODOLOGY/PRINCIPAL FINDINGS: We used DNA sequences from the mitochondrial COI gene and the nuclear ITS2 region to check species boundaries according to the evolutionary genetic (EG species concept in five morphospecies in the putative ancient asexual ostracod genera, Penthesilenula and Darwinula, from different continents. We applied two methods for detecting cryptic species, namely the K/θ method and the General Mixed Yule Coalescent model (GMYC. We could confirm the existence of species in all five darwinulid morphospecies and additional cryptic diversity in three morphospecies, namely in Penthesilenula brasiliensis, Darwinula stevensoni and in P. aotearoa. The number of cryptic species within one morphospecies varied between seven (P. brasiliensis, five to six (D. stevensoni and two (P. aotearoa, respectively, depending on the method used. Cryptic species mainly followed continental distributions. We also found evidence for coexistence at the local scale for Brazilian cryptic species of P. brasiliensis and P. aotearoa. Our ITS2 data confirmed that species exist in darwinulids but detected far less EG species, namely two to three cryptic species in P. brasiliensis and no cryptic species at all in the other darwinulid morphospecies. CONCLUSIONS/SIGNIFICANCE: Our results clearly demonstrate that both species and cryptic diversity can be recognized in putative ancient asexual ostracods using the EG species concept, and that COI data are more suitable than ITS2 for this purpose. The discovery of up to eight cryptic species within a single morphospecies will significantly increase estimates of biodiversity in this asexual ostracod group. Which factors, other than long-term geographic isolation, are important for speciation processes in these ancient asexuals remains to be investigated.

  12. [Euphausiids (Crustacea: Melacostraca) from the southern Mexican Caribbean Sea].

    Science.gov (United States)

    Castellanos, Iván; Gasca, Rebeca

    2002-03-01

    The composition, abundance and distribution of euphausiids from the southern part of the Mexican Caribbean Sea (August 1986) were sampled during the ARCOMM I cruise on board the R/V "Justo Sierra" of UNAM. Sampling was done using a Bongo-net (0.5 mm mesh size) performing oblique hauls from 200 m to the surface at 28 stations. Of the total euphausiid numbers, the most abundant species was Stylocheiron carinatum (49%), followed by Euphausia americana (9.8%) and E. tenera with (7.8%). The highest total density and that of the three most abundant species occurred during the night sampling, and probably was related to vertical migration patterns. The Bray-Curtis index revealed three station assemblages, related to the day-night variations of the euphausiid community. Species were distributed mainly in the oceanic area, and were absent in the neritic zones. The local fauna shows a strong affinity for the euphausiid community of the Gulf of Mexico and other areas of the Caribbean Sea. Four species are considered to be new records for the western Caribbean Sea.

  13. Use of neomysis mercedis (crustacea: mysidacea) for estuarine toxicity tests

    Energy Technology Data Exchange (ETDEWEB)

    Brandt, O.M.; Fujimura, R.W.; Finlayson, B.J. (Aquatic Toxicology Laboratory, Elk Grove, CA (United States))

    1993-03-01

    The mysid Neomysis mercedis was examined as a test organism for use in acute toxicity tests at intermediate salinities characteristic of estuarine waters. Several sensitive invertebrate species are available for marine assessments (mysids) and freshwater tests (cladocerans), but few are available for estuarine toxicity tests. Observations in the laboratory indicate that Neomysis mercedis can be reared successfully at a temperature of 17[degrees]C, a salinity of 2%, and a population density less than 5/L. Brine shrimp nauplii Artemia salina, algae, and commercial foods were used to sustain mysid cultures. Neomysis mercedis is vivaparous and can complete its life cycle in 3-4 months. Neomysis mercedis is as sensitive as or more sensitive to toxicants than the marine mysid Mysidopsis bahia and the freshwater cladocerans Daphnia magna, Ceriodaphnia dubia, and Simocephalus serrulatus. The mean 96-h LC50 values (concentrations lethal to half the test animals) for N. mercedis, in increasing order, were 0.20 [mu]g/L for thiobencarb, and for malathion, 14 [mu]g/L for carbofuran, 150 [mu]g/L for copper sulfate, 280 [mu]g/L for thiobencarb, and 1,600 [mu]g/L for molinate. Neonates (5 d postrelease) were generally more sensitive than older juveniles. Coefficients of variation (100[center dot]SD/mean) of LC50 values varied from 21 to 35%. 37 refs., 2 figs., 7 tabs.

  14. The spelling of the name Sarothrogammarus (Crustacea, Amphipoda)

    NARCIS (Netherlands)

    Stock, Jan H.

    1972-01-01

    In my recent revision of the Sarothrogammarus-group (Bijdr. Dierk., 41: 94—129, 1971), I consistently used the spelling Sarathrogammarus. Professor S. Ruffo, of Verona, kindly pointed out to me that the original spelling of the name is Sarothrogammarus (see Martynov, 1935, Trav. Inst. zool. Acad.

  15. 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.

  16. Life cycle of Cyclestheria hislopi (Baird, 1859) (Crustacea, Branchiopoda).

    Science.gov (United States)

    Yashima, M N; Baldochi, A; Rocha, O

    2011-05-01

    The Conchostraca (clam shrimps) are a group of microcrustaceans found in freshwater habitats. They inhabit the benthos, yet many can swim actively and are often associated with macrophytes. They are filter-feeders, deriving their food from suspended particles or solids stirred up from the bottom. In Brazil, five species have been recorded and the life cycle of one of these, Cyclestheria hislopi (Baird, 1859) was investigated in this study. Specimens were collected from fish-farming tanks in upstate São Paulo and from the floodplain of the Miranda River, in the Mato Grosso swamplands of center-west, Brazil. We determined the following variables: post-embryonic development, duration of life cycle (longevity), mean period between broods, duration of instars and individual growth. Taxonomic features of the Cyclestheria sp. specimens from Mato Grosso were also assessed to check the possibility that they belonged to another species of the same genus or a separate ecotype of C. hislopi.

  17. The first hypothelminorheic Crustacea (Amphipoda, Dogielinotidae, Hyalella from South America

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    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

  18. Genetic divergence of tanaidaceans (Crustacea: Peracarida with low dispersal ability

    Directory of Open Access Journals (Sweden)

    Kim Larsen

    2014-03-01

    Full Text Available In this study, the phylogeographic patterns of nuclear, ribosomal and mtDNA gene fragments of five tanaidacean species (Zeuxo, Tanaidae from the Atlantic, Pacific and Mediterranean Sea were investigated. We aimed to interpret results in the framework of current hypotheses on the distribution of small invertebrates with very limited dispersal ability. Evidence for a surprisingly high genetic divergence was found for intertidal tanaidaceans from the North Atlantic. This is a result of poor dispersal potential, as tanaidaceans have direct development, no pelagic stage, and very limited swimming capacity. However, lower genetic divergence was found between an intertidal tanaid species from the North Atlantic and two from the North Pacific, which suggests a scenario of recent colonization following the last glacial maximum. The species Zeuxo normani was found to be a species complex consisting, at least, of Z. normani (California, Z. cf. normani (Japan, Z. cf. normani (Australia, Z. sp. A (Korea, and Z. holdichi (Spain and France. Our results showed that traditional species identification underestimates tanaidacean diversity and that what have been previously perceived as reliable diagnostic morphological characters, are, however, variable and unreliable.

  19. Records of Australian Fouling Organisms: Sessile Barnacles (Crustacea, Cirripedia),

    Science.gov (United States)

    1981-04-01

    1976-April 1978. Report 731, Materials Research Labs., Melbourne. Endean, R., Kenny, R. & Stephenson, W. (1956), The ecology and distribution of...The ecology and distribution of intertidal organisms on certain islands off the Queensland coast. Aust. J. mar. Freshwat. Res. 7, 317-42. Ferguson...USA (Attention: Dr. J.R. De Palma ) Naval Oceans Systems Center, Hawaii Laboratory (Attention: Dr. J.C. Grovhoug) Dr. B.A. Foster, University of Auckland, NZ Dr. A.R. Ross, San Diego Natural History Museum, San Diego, USA

  20. Stomatopods (Crustacea: Hoplocarida from the Gulf of Tehuantepec, Mexico

    Directory of Open Access Journals (Sweden)

    I. F. Barbosa-Ledesma

    2000-06-01

    Full Text Available A total of 1173 specimens of Stomatopoda were captured in 27 localities at different depths (20 to 73 m during three oceanographic cruises in the Mexican Pacific along the continental shelf of the states of Oaxaca and Chiapas. Seven species were identified of the families Eurysquillidae, Lysiosquillidae and Squillidae. Squilla hancocki and Squilla parva were the most abundant species and the most frequently found together. The relationships between total length and carapace length were obtained for these species, which show that males of S. hancocki have a longer carapace length than females having the same total length, whereas for S. parva the opposite occurs. Larger sizes than previously reported were obtained for Lysiosquilla panamica and Squilla mantoidea. Squilla bigelowi was recorded for the first time in the Gulf of Tehuantepec. All the species were found in the intermediate platform (25-60 m; E. veleronis, S. hancocki and S. parva extended their distributions to the external platform (60-120 m, and S. hancocki and S. parva reached the circalittoral zone (10-25 m.Se capturaron un total de 1173 especímenes del orden Stomatopoda en 27 localidades a diferentes profundidades (20 a 73 m durante tres cruceros oceanográficos en el Pacífico Mexicano a lo largo de la plataforma continental de los estados de Oaxaca y Chiapas. Se identificaron siete especies de las familias Eurysquillidae, Lysiosquillidae y Squillidae. Squilla hancocki y Squilla parva fueron las especies más abundantes y las más frecuentemente encontradas juntas. Se obtuvieron las relaciones entre la longitud total y la longitud del caparazón para estas dos especies; que indican que con una misma longitud total los machos de S. hancocki tienen una longitud del caparazón mayor que las hembras, mientras que para S. parva sucede lo contrario. Se registraron longitudes totales más grandes a las reportadas previamente para Lysiosquilla panamica y Squilla mantoidea. Squilla bigelowi se registró por primera vez en el área. Todas las especies se encontraron en la plataforma intermerdia (25-60 m; E. Veleronis, S. Hancocki y S. parva se distribuyeron hasta la plataforma externa (60-120 m y S. hancocki y S. parva abarcaron la zona circalitoral (10-25 m.

  1. Identification of the first neuropeptides from the Amphipoda (Arthropoda, Crustacea).

    Science.gov (United States)

    Christie, Andrew E

    2014-09-15

    Despite being used as models in the field of ecotoxicology, including use in studies of endocrine disruption, little is known about the hormonal systems of amphipods, particularly their peptidergic signaling systems. Here, transcriptome shotgun assembly (TSA) sequences were used to predict the structures of the first neuropeptides from members of this crustacean order. Using a well-established workflow, BLAST searches of the extant amphipod TSA data were conducted for putative peptide-encoding transcripts. The pre/preprohormones deduced from the identified TSA sequences were then used to predict the mature structures of amphipod neuropeptides. In total, 43 putative peptide-encoding transcripts were identified from three amphipods, Echinogammarus veneris, Hyalella azteca and Melita plumulosa. Collectively, 139 distinct mature peptides (110 from E. veneris alone) were predicted from these TSA sequences. The identified peptides included members of the adipokinetic hormone/red pigment concentrating hormone, allatostatin A, allatostatin B, allatostatin C, bursicon α, bursicon β, crustacean hyperglycemic hormone, diuretic hormone 31, FLRFamide, molt-inhibiting hormone, myosuppressin, neuroparsin, neuropeptide F, orcokinin, pigment dispersing hormone (PDH), proctolin, RYamide, SIFamide, sulfakinin and tachykinin-related peptide families. Of particular note were the identifications of orcokinins possessing SFDEIDR- rather than the typical NFDEIDR- amino-termini, e.g. SFDEINRSNFGFN, a carboxyl-terminally amidated orcokinin, i.e. SFDEINRSNFGFSamide, PDHs longer than the stereotypical 18 amino acids, e.g. NSELLNTLLGSKSLAALRAAamide, and a 13 rather than 12 amino acid long SIFamide, i.e. GPYRKPPFNGSIFamide. These data not only provide the first descriptions of native amphipod neuropeptides, but also represent a new resource for initiating investigations of peptidergic signaling in the Amphipoda.

  2. Redescription of five gnathiid species from Japan (Crustacea: Isopoda).

    Science.gov (United States)

    Ota, Yuzo

    2013-01-01

    Five gnathiid species from Japan are redescribed based on14 holotypes, their paratypes, topotypes, and new materials. Observations of these specimens revealed that Caecognathia kikuchii (Nunomura, 1992) should be transferred to genus Elaphognathia and Caecognathia nasuta (Nunomura, 1992) to genus Gnathia. Furthermore, Caecognathia amakusaensis Nunomura, 1992, C. saikaiensis Nunomura, 1992, Gnathia azumai Nunomura, 2012a, G. quadricephala Nunomura, 2012a, and G. recticornata Nunomura, 2012a are considered to be junior synonyms of E. kikuchii. Gnathia hirayamai Nunomura, 1992, G. nagasakiensis Nunomura, 2012a, G. shijikiensis Nunomura, 2012a, and G. brevicephala Nunomura, 2012a are considered to be junior synonyms of G. nasuta. Moreover, Gnathia sanrikuensis Nunomura, 1998 and G. mutsuensis Nunomura, 2004 are redescribed. Gnathia bungoensis Nunomura, 1982 is not completely redescribed because the key characteristics were lacking. The geographical records of these species are provided.

  3. The spelling of the name Sarothrogammarus (Crustacea, Amphipoda)

    NARCIS (Netherlands)

    Stock, Jan H.

    1972-01-01

    In my recent revision of the Sarothrogammarus-group (Bijdr. Dierk., 41: 94—129, 1971), I consistently used the spelling Sarathrogammarus. Professor S. Ruffo, of Verona, kindly pointed out to me that the original spelling of the name is Sarothrogammarus (see Martynov, 1935, Trav. Inst. zool. Acad. Se

  4. 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.

  5. [Marine biodiversity of Costa Rica, the microcrustacea: Copepoda (Crustacea: Maxillopoda)].

    Science.gov (United States)

    Morales-Ramírez, A

    2001-12-01

    This report is part of a series that summarizes the species and localities of Costa Rican marine taxa. A review of the literature on copepods, both pelagic and benthic for the Pacific and Caribbean coast of Costa Rica, includes eighty species. Sixty seven pelagic species have been found, distributed between sixteen calanoid, one cyclopoid, three harparticoid and four poecilostomatoid families. Moreover, thirteen benthonic species distributed into six families, all harparticoids, are reported. Among the pelagic families, Pontellidae has six species, while Paracalanidae and Eucalanidae had five each. Other families, like Calanidae, Pseudodiaptomidae and Acartiidae had four species and most families only one. Forty five species are reported only for the Pacific coast, thirteen for the Caribbean coast, only nine species occurred in both coasts; being a direct consequence of the more intensive research effort in the Pacific. Pelagic copepod biodiversity reflects different oceanographic conditions in both coasts. Typical estuarine species were found in the lower region of the Gulf of Nicoya, while a mixture of estuarine and oceanic species were found in Golfo Dulce. Diversity in the Caribbean, specially at the Cahuita coral reef is lower in comparison with the copepod diversity found in other regions in the Caribbean sea. This may be due to the high sediment resuspension rate characteristic of the Cahuita coral reef, which could affect the reproduction of many holozooplankters, specially copepods. Although sixty seven pelagic copepod species appears to be in low numbers, in terms of specific biodiversity it is as high when compared to numbers found in other tropical areas. Thirteen species are reported in the literature, all harparticoids. Five species, three sub-species and one genera were new to science. Balacopsylla is reported for the first time from a neotropical regions, while the genus Karllangia, represented by two coexisting species in the Caribbean coast, belong to a few circumtropical-subtropical genera. The most diverse family was Tetragonicipitidae. This is the first effort to summarize the available information about the biodiversity of marine copepods for Costa Rica's coasts.

  6. Amphipoda (Crustacea) from Palau, Micronesia: Families Maeridae and Melitidae.

    Science.gov (United States)

    Myers, A A

    2016-09-26

    Seven species of senticaudate amphipods belonging to the families Maeridae and Melitidae are recorded from Palau, Federated States of Micronesia, and are figured. Three species are new to science and are fully described and figured.

  7. Fertilizers for Daphnia sp. (Crustacea, Cladocera) production in experimental tanks

    OpenAIRE

    Cunha, Patrícia de Souza Lima; Lanna,Eduardo Arruda Teixeira; Bastos,Rafael Kopschitz Xavier; Quadros,Moisés; Rezende,Fabrício Pereira; Freitas,Leandro Monteiro de

    2010-01-01

    The current study was aimed at investigating the use of different fertilizers - dicalcium phosphate, biosolid and quail feces - as a strategy for water fertilization in Daphnia sp production. It was used twenty-four 100-L tanks of asbestos cement distributed in a completely randomized split-plot design with six replicates, with plots in the three kinds of fertilizers (biosolid, dicalcium phosphate, and quail feces) and a control without fertilization (WF) and subplots at the times of assessme...

  8. 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.

  9. Talitrid amphipods (Crustacea) as biomonitors for copper and zinc

    Science.gov (United States)

    Rainbow, P. S.; Moore, P. G.; Watson, D.

    1989-06-01

    Data are presented on the copper and zinc concentrations of four talitrid amphipod species (standard dry weight 10 mg), i.e. Orchestia gammarellus (Pallas), O. mediterranea Costa, Talitrus saltator Montagu and Talorchestia deshayesii (Audouin), from 31 sites in S.W. Scotland, N. Wales and S.W. England. More limited data are also presented for cadmium in O. gammarellus (three sites) and T. deshayesii (one site). In S.W. Scotland, copper concentrations were raised significantly in O. gammarellus from Whithorn and Auchencairn (Solway) and Loch Long and Holy Loch (Clyde). In S.W. England, copper concentrations were highest at Restronguet Creek, Torpoint and Gannel (Cornwall). Samples of O. gammarellus from Islay (inner Hebrides) taken adjacent to the effluent outfalls of local whisky distilleries fell into two groups based on copper concentrations (presumably derived from copper stills), the higher copper levels deriving from the more productive distilleries. High copper levels were found in T. saltator and Tal. deshayesii from Dulas Bay (Wales). Zinc levels in O. gammarellus were high in Holy Loch and Auchencairn (Scotland), Gannel and Torpoint (England) but extremely elevated (as was Zn in O. mediterranea) at Restronguet Creek. Zinc was also high in T. saltator from Dulas Bay (Wales), but not in Tal. deshayesii. Cadmium levels in O. gammarellus from Kilve (Bristol Channel) were much raised. These differences (a) conform with expectations of elevated bioavailability of these metals from well researched areas (S.W. England & N. Wales), and (b) identify hitherto unappreciated areas of enrichment in S.W. Scotland. Orchestia gammarellus is put forward as a suitable biomonitor for copper and zinc in British coastal waters.

  10. Three artotrogids (Crustacea: Copepoda: Siphonostomatoida from the Ross Sea, Antarctica

    Directory of Open Access Journals (Sweden)

    Mercedes Conradi

    2014-12-01

    Full Text Available The Artotrogidae, one of the most primitive of siphonostomatoid families, consists currently of 117 species in 21 genera. Most of these species (65% are poorly or incompletely described since they have been rarely recorded in recent decades and, when encountered, have been found in very low numbers. During the 19th Italian Antarctic Expedition, with the RV Italica, to the Ross Sea in austral summer 2004, some artotrogid copepods were collected. This paper redescribes two species of artotrogid copepods, which are known only from the Southern Ocean, Neobradypontius neglectus and Cryptopontius latus, and describes for the first time a male of the genus Neobradypontius. Furthermore, a new species is described and added to Sestropontius, increasing the number of known species of this genus to three. The main discrepancies between the original descriptions and the specimens of the two species collected from the Ross Sea redescribed here were on the armature of the antennary exopod and leg 5. The new species, Sestropontius italicae, shares with its most similar congener, S. mckinnoni, the armature of the third endopodal segment of leg 1 and leg 2 and that of the third exopodal segment of leg 4. However, the segmentation of the antennae and the armature on the antennary exopod are different.

  11. Fecundity and fertility of Macrobrachium amazonicum (Crustacea, Palaemonidae

    Directory of Open Access Journals (Sweden)

    R. R. da Silva

    Full Text Available In Brazil, studies with native freshwater prawn species were discontinued due to great importance of Macrobrachium rosenbergii. Therefore, it is necessary to continue investigations about our species, in order to develop technology adequate to our reality and in a future allow prawn farmers to culture other species. The aim of this study was to determine the fecundity and fertility of Macrobrachium amazonicum captured monthly from June 1999 to June 2001 from Jaguaribe River, Itaiçaba, Ceará, Brazil. Prawns were collected using fishing net and transferred at Biological Science Laboratory, Ceará State University (Fortaleza, Ceará, Brazil. Among the ovigerous M. amazonicum females, 60 were randomly selected to determine fecundity. The eggs adhered to the pleopods were taken out and they were then placed in a Gilson solution, and then stored in alcohol 70%. Individual fecundity was determined from the total egg counting, using a stereoscopic microscope. To determine fertility, ovigerous M. amazonicum females were stored in individual 10 L-glass tanks maintained under strong aeration. After the hatching, the larvae were siphoned and counted. The data referring to total length and weight of all the females, storage date, coloration and number of eggs, weight and coloration of gonad and number of hatched larvae were noted. With respect to average fecundity (F by length classes, the lowest and highest number of eggs observed was 696 and 1,554, respectively. As for fecundity by weight classes, the lowest number of eggs observed was 760 and the highest, 1,690. The highest number of eggs observed individually per hatching was 2,193. Average fecundity/total length (L and average fecundity/total weight (W may be expressed by a linear relationship. The adjusted equations are: F = -411.6 + 203.1 L (p < 0.0001 and F = 566.4 + 157.3 W (p < 0.0001, respectively. In the analysis of average fertility (N per length classes, the lowest and highest number of larvae observed was 374 and 1,301, respectively. With respect to fertility per weight classes, the lowest number of larvae was 581 and the highest, 1,391. In this work, the maximum number of larvae observed per hatching for females kept in laboratory was 2,594. Average fertility/total length and average fertility/total weight may be expressed by a linear relationship. The adjusted equations are: N = -1042.7 + 264.9 L (p < 0.0002; N = 384.1 + 160.3 W (p < 0.003. From these results we can deduced that fecundity and fertility of M. amazonicum are lower than ones commercial species, nevertheless it can be captured during all year long. The number of captured prawns was large in the months whose level of water was low; the inverse was observed in the months that the river was with a high volume of water.

  12. Transformations of mercury in the terrestrial isopod Porcellio scaber (Crustacea).

    Science.gov (United States)

    Jereb, Vesna; Horvat, Milena; Drobne, Damjana; Pihlar, Boris

    2003-03-20

    The biological cycle of mercury in the terrestrial isopod Porcellio scaber was investigated. Testing the possibility of in vivo Hg(2+) methylation was divided into two methodologically different parts. Firstly, concentrations of total mercury and MeHg in isopods P. scaber and their environment from a Hg-unpolluted area were measured by the use of validated methods (CV AAS, CV AFS). The data obtained show that the percentage of MeHg in leaves, soil and faeces was less than 1%. In contrast, the percentage of MeHg in gut and hepatopancreas was increased to 14 and 77%, respectively, indicating methylation of Hg(2+) in the gut and its further accumulation in glands. To confirm this assumption, the second methodology was applied-a radiotracer technique with 203Hg(2+) of high specific activity. There are few radiotracer techniques for Hg-methylation assays; for our work we chose the method of Czuba et al. which includes alkaline leaching of Hg species, their extraction into dithizone-toluene, followed by specific separation of Hg dithizonates by thin-layer chromatography and gamma counting. All steps of the analytical protocol were checked and optimised by the use of aqueous solutions of 203Hg(2+) and Me(203)Hg(+). The most important finding was that cleaning-up the extract through a florisil column is not appropriate, because the column retains different percentages of Hg(2+) and MeHg(+) and consequently affects the accuracy of the final result. This optimised protocol was then applied to Hg transformation studies in the terrestrial isopod P. scaber. Leaching Hg species from P. scaber fed with 203Hg(2+) or Me(203)Hg(+) dosed food was completely efficient only at elevated temperatures. Preliminary results of methylation/demethlytion studies are rather variable but they show that both processes (Hg(2+)MeHg(+)) take place in the isopod P. scaber. Additionally, an assessment of the mass balance of Hg in isopods P. scaber exposed to 203Hg(2+) indicates that volatile Hg species are also formed.

  13. Species of marine Isopoda (Crustacea, Peracarida from southern Brazil

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    Plínio Soares Moreira

    1972-01-01

    Full Text Available Some species of marine Isopoda collected in southern Brazil mostly in shallow-water and amongst seaweeds are studied. Five species are discussed and illustrated. A diagnosis is given for each species. Idotea metallica and Synidotea marplatensis are new oc currences for the area, and both have had their geographical range extended to off Rio de Janeiro. The presence of Idotea balthica and Erichsonella filiformis in southern Brazil was definitely asserted. Illustrations of both sexes of Rocinela signata and details about its occurrence in the region surveyed were made.O presente trabalho relaciona algumas espécies de isopodes marinhos coletados na região centro-sul do Brasil, em águas razas, em algas, ou entre emaranhados de folhas e raizes. Cinco espécies são ilustradas e discutidas. Uma diagnose é dada para cada espécie. I. metallica e S. marplatensis, constituindo novas ocorrências para a região, tiveram sua distribuição geográfica consideravelmente ampliada ate o Rio de Janeiro. A presença de I. balthica e E. filiformes na região e seguramente confirmada. Finalmente, são figurados o macho e a fêmea da espécie R. signata, ao mesmo tempo em que são fornecidos detalhes sobre sua ocorrência.

  14. 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...

  15. An annotated bibliography of parasitic Isopoda (Crustacea of Chondrichthyes

    Directory of Open Access Journals (Sweden)

    Plínio Soares Moreira

    1978-01-01

    Full Text Available This annotated bibliography is an attempt to bring together all available published records on the parasitic isopods of Chondrichthian fishes as a basic reference source. An effort was made to synonymise old names according to the presently accepted scientific names.

  16. Global biodiversity and phylogenetic evaluation of remipedia (crustacea.

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    Marco T Neiber

    Full Text Available Remipedia is one of the most recently discovered classes of crustaceans, first described in 1981 from anchialine caves in the Bahamas Archipelago. The class is divided into the order Enantiopoda, represented by two fossil species, and Nectiopoda, which contains all known extant remipedes. Since their discovery, the number of nectiopodan species has increased to 24, half of which were described during the last decade. Nectiopoda exhibit a disjunct global distribution pattern, with the highest abundance and diversity in the Caribbean region, and isolated species in the Canary Islands and in Western Australia. Our review of Remipedia provides an overview of their ecological characteristics, including a detailed list of all anchialine marine caves, from which species have been recorded. We discuss alternative hypotheses of the phylogenetic position of Remipedia within Arthropoda, and present first results of an ongoing molecular-phylogenetic analysis that do not support the monophyly of several nectiopodan taxa. We believe that a taxonomic revision of Remipedia is absolutely essential, and that a comprehensive revision should include a reappraisal of the fossil record.

  17. Zoological notes from port Dickson : III. Crustacea Anomura and Brachyura

    NARCIS (Netherlands)

    Buitendijk, A.M.

    1947-01-01

    From his stay at Port Dickson on the Malay Peninsula at the beginning of 1946 Major Dr. L. D. Brongersma of the N I C A Detachment brought home several species of crabs. A list of this material which is now incorporated in the collections of the Museum of Natural History at Leiden is given below, wh

  18. Notes on adventive Amphipoda (Crustacea, Malacostraca) on the Dutch coast

    NARCIS (Netherlands)

    Stock, J.H.; Bloklander, A.E.M.H.

    1952-01-01

    During the last few years several persons have been paying attention to the animals transported by floating objects (e.g. bunches of weeds and hydroids, corks, mines, floats, etc.). A careful examination of recent finds increased the list of species known of nearly all groups of marine animals, foun

  19. Remarkable convergent evolution in specialized parasitic Thecostraca (Crustacea)

    DEFF Research Database (Denmark)

    Pérez-Losada, Marcos; Høeg, Jens Thorvald; Crandall, Keith A

    2009-01-01

    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...... 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...

  20. 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

    traits associated with their lifecycle, larval biology, reproduction, and adult morphology. Our analyses show that thecostracan biological diversity resulted both from unique innovations and from events of convergence. This provides an opportunity to reevaluate previous classifications of the Thecostraca...

  1. The tantulocarid genus Arcticotantalus removed from Basipodellidae into Deoterthridae (Crustacea

    DEFF Research Database (Denmark)

    Knudsen, Steen Wilhelm; Kirkegaard, Maja; Olesen, JØrgen

    2009-01-01

    is tentatively placed in Deoterthridae based on the mode of formation of the male trunk sac, the pattern of ornamentation on the tergites and cephalic shield, and the number of setae on the thoracopods and caudal rami. It is suggested that the genus Arcticotantulus Kornev, Tchesunov & Rybnikov, 2004 is removed...

  2. 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 sp

  3. Two new species of Floresorchestia (Crustacea, Amphipoda, Talitridae) in Thailand.

    Science.gov (United States)

    Wongkamhaeng, Koraon; Dumrongrojwattana, Pongrat; Pattaratumrong, Manasawan Saengsakda

    2016-01-01

    The beach-hopper and land-hopper genus Floresorchestia Bousfield, 1984 is most widespread in terrestrial and marine littoral habitats and has been recorded from the South African coasts through to tropical Indo-Pacific and Caribbean Sea. In Thailand, there is only Floresorchestia samroiyodensis Azman, Wongkamhaeng & Dumrongrojwattana, 2014 reported from the swamp of Prachuab Kiri Khan, southern Thailand. In this work, two new species of Floresorchestia from Phutsa Reservoir in Nakhon Ratchasima and the man-made swamp in Burapha University are described. The new species are characterised by the mandible left lacinia mobilis 4-dentate; the posterior margin of merus, carpus and propodus covered in palmate setae; the uropod 3 peduncle with two robust setae and the telson longer than broad. The characters of the specimens are described and illustrated in this paper. All specimens are deposited in the Princess Maha Chakri Sirindhorn Natural History Museum, Prince of Songkla University, Thailand.

  4. The tantulocarid genus Arcticotantalus removed from Basipodellidae into Deoterthridae (Crustacea

    DEFF Research Database (Denmark)

    Knudsen, Steen Wilhelm; Kirkegaard, Maja; Olesen, JØrgen

    2009-01-01

    from Basipodellidae and placed in Deothertridae instead, in accordance with the mode of trunk sac development in males and the absence in the latter family of a cephalic rostrum. Various internal anatomical features were examined, including the tubular structures inside the head of the tantulus larvae....... The first live photographs of any species of Tantulocarida are presented. This is also the first report on Tantulocarida from West Greenland....

  5. A new species of Branchinecta (Crustacea: Anostraca) from Uruguay.

    Science.gov (United States)

    Rogers, D Christopher; Lorenz, Helen Racz

    2015-10-22

    Branchinecta uruguayensis, a new species of fairy shrimp, is described from a single seasonally astatic aquatic habitat in coastal Uruguay. This is the first record of an anostracan from the nation of Uruguay. Male B. uruguayensis n. sp. are separated from other Branchinecta species by the form of the second antennae. Branchinecta uruguayensis n. sp. share the distal antennomere lobiform projection with B. papillata Rogers, De los Rios, & Zúñiga, 2008 and B. achalensis César, 1985. Branchinecta uruguayensis n. sp. females are readily separated from all other Branchinecta by the presence of posteriolateral thoracic spines and lateral crenulations on the first abdomen segment margins. A key is provided to the Branchinectidae of South America.

  6. RNA Interference with Special Reference to Combating Viruses of Crustacea

    OpenAIRE

    La Fauce, Kathy; Owens, Leigh

    2012-01-01

    RNA interference has evolved from being a nuisance biological phenomenon to a valuable research tool to determine gene function and as a therapeutic agent. Since pioneering observations regarding RNA interference were first reported in the 1990s from the nematode worm, plants and Drosophila, the RNAi phenomenon has since been reported in all eukaryotic organisms investigated from protozoans, plants, arthropods, fish and mammals. The design of RNAi therapeutics has progressed rapidly to design...

  7. Control of cardiovascular function and its evolution in Crustacea.

    Science.gov (United States)

    McMahon, B R

    2001-03-01

    Work in the last decade has shown that crustacean open circulatory systems are highly efficient and controlled in a complex manner. Control occurs at several levels. Myocardial contraction is initiated in the cardiac ganglion but constantly modulated by the central nervous system, both directly via the cardioregulatory nerves and indirectly via the neurohormonal system. Heart rate and stroke volume can be controlled independently and measurements of both are needed to assess cardiac output accurately. Haemolymph outflow from many arthropod hearts is via a complex multiarterial distribution system, and the regional distribution of cardiac output is tightly controlled via cardioarterial valves at the base of each artery. These valves contain innervated muscle, and differential contraction serves to regulate the efflux of oxygenated haemolymph into a particular system. The major influence on both the evolution and control of arthropod open blood vascular systems is efficiency of oxygen uptake and delivery. This influence is illustrated by reference to a variety of crustacean and other arthropod types.

  8. Cladocera (Crustacea: Branchiopoda of Vientiane province and municipality, Laos

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    Alexey A. Kotov

    2013-12-01

    Full Text Available We present the first faunistic report on the Laotian Cladocera from diverse habitats in Vientiane province, Central Laos. We counted a total of 70 species, belonging to 37 genera, which is realistically close to an estimated 77 species. The five most common species were Diaphanosoma excisum, Ephemeroporus cf. barroisi, Anthalona harti, Macrothrix spinosa and Chydorus cf. eurynotus. The fauna is typically Oriental/Southeast (SE Asian, showing a strong similarity with neighbouring countries and especially Thailand. We discussed the current taxonomical status of the species and provided illustrations of the main taxa for future comparison. There are no surprising faunistic elements, except for a few new records for SE Asia (Matralona freyi, Ilyocryptus thailandensis. Our data is preliminary, as the fauna of Laos remains insufficiently studied. As for SE Asia as a whole, a significant number of taxa is in need of taxonomical revision.

  9. The Species of the genus Sacculina (Crustacea Rhizocephala)

    NARCIS (Netherlands)

    Boschma, H.

    1937-01-01

    The genus Sacculina was founded by Thompson (1836), who described the species Sacculina carcini, the parasite of the shore crab. A second species, Sacculina inflata, was described by Leuckart (1859). Anderson (1862) gave a description of a third species, Sacculina triangularis, and published importa

  10. 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 Exped

  11. Feeding habits of Hyale media (Dana, 1853 (Crustacea-Amphipoda

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    Airton Santo Tararam

    1985-01-01

    Full Text Available Feeding of males and females of the Gammaridea Hyate media at mature and immature stages were tested in laboratory experiments. Macro and microscopic algae as well as dead or alive animals were utilized as food. This gammarid is omnivorous, feeding by predation, scavenging, browsing and scraping. Feeding behaviour was discontinuous. Padina vickersiae was more utilized in winter and Ulva fasciata in summer. The feeding activity of all the animals showed great variability in relation to the type of food. Higher temperatures probably account for the higher consumption observed in summer.

  12. Identifying Chinese species of Gammarus (Crustacea: Amphipoda) using DNA barcoding

    Institute of Scientific and Technical Information of China (English)

    Zhong-e HOU; Zhu LI; Shu-qiang LI

    2009-01-01

    Using a standard cytochrome c oxidase I sequence, DNA barcoding has been shown to be effective to distinguish known species and to discover cryptic species. Here we assessed the efficiency of DNA barcoding for the amphipod genus Gammarus from China. The maximum intraspecific divergence for widespread species, Gammarus lacustris, was 3.5%, and mean interspecific divergence reached 21.9%. We presented a conservative benchmark for determining provisional species using maximum intraspecific divergence of Gammarus lacustris. Thirty-one species possessed distinct barcode clusters. Two species were comprised of highly divergent clades with strong neighbor-joining bootstrap values, and likely indicated the presence of cryptic species. Although DNA barcoding is effective, future identification of species of Gammarus should incorporate DNA barcoding and morphological detection[Current Zoology 55(2):158-164,2009].

  13. Effects of predation by Hydra (Cnidaria on cladocerans (Crustacea: Cladocera

    Directory of Open Access Journals (Sweden)

    Ligia Rivera-De la Parra

    2016-03-01

    Full Text Available Planktonic cladocerans have evolved different strategies to avoid predation from vertebrates; these include changes in morphology, behavior, physiology, and/or life-history traits. However, littoral cladocerans are better adapted to avoid invertebrate predation particularly from insect larvae by evolving morphological and physiological adaptations. Nevertheless, this has not been proven for some littoral predators such as Hydra. In this study, we provide quantitative data on how Hydra affects its zooplankton prey. We studied the predation behavior on Alona glabra, Ceridodaphnia dubia, Daphnia pulex, Daphnia cf. mendotae, Diaphanosoma birgei, Macrothrix triserialis, Moina macrocopa, Pleuroxus aduncus, Scapholeberis kingi, Simocephalus vetulus, Elaphoidella grandidieri, Brachionus rubens and Euchlanis dilatata. We also tested the indirect effect of allelochemicals from Hydra on the demography of Daphnia cf. mendotae. Littoral cladocerans are specially adapted to resist nematocyst injection and discharge of toxic substances from Hydra. A significant decrease in the population growth rate from 0.21 to 0.125 d-1 was observed at densities of 2 ind. ml-1. The role of carapace thickness as an adaptive strategy of littoral cladocerans against Hydra predation is discussed.

  14. The genus Chlamydotheca Saussure (Crustacea: Ostracoda in northeastern Argentina

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    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.

  15. COMPORTAMENTO REPRODUTIVO DE Dendrocephalus brasiliensis, Pesta 1921 (CRUSTACEA: ANOSTRACA

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    José Patrocínio Lopes

    2011-12-01

    Full Text Available The reproductive behavior of fresh water Anostracan has not been massively studied by the carcinology specialized literature, regarding especially the Dendrocephalus brasiliensis Pesta, 1921, about which there are abundant studies only on the geographical distribution of that Anostracan. The objective of this research was to investigate the reproductive behavior of this Anostracan in different periods (dry and rainy. For this, mature individuals of both sexes were used. They were collected in four ponds of the Fish Farming Station of Paulo Afonso (FFSPA, by monthly capture in each pond, within the period from December 2004 to November 2005. The reproduction type was observed by placing some females in aquariums with males and placing the other ones individually, starting from the nauplii phase, where they stayed for 15 days (reproductive age. The individuals' sexual proportion was calculated by the relative frequencies of males and of females, every month, for the whole collection period. At 10 days cysts production is possible and the number of produced cysts is related to the size of the female. The ratio male:female in the studied period was of 1 male to 1.07 female. The proportion male:female was 51.75% female to 48.25% male along the year. The observation of the reproductive behavior showed the reproduction is sexed.

  16. 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...

  17. Redescription of three cirolanid isopods (Crustacea: Peracarida) from Indonesia.

    Science.gov (United States)

    Sidabalok, Conni M; Bruce, Niel L

    2016-05-24

    Three species of Cirolanidae described by Nierstrasz in 1931 are redescribed from the type material: Cirolana indica Nierstrasz, 1931, with new material from Singapore and Lombok Island, Indonesia; C. vanhoeffeni Nierstrasz, 1931; and C. stebbingi Nierstrasz, 1931, which is here transferred to the genus Politolana Bruce, 1981 based on the elongate body, long peduncle of pleopod 1, narrow and slender frontal lamina, flat and robust carpus of pereopod 7, long and acute robust setae on merus-propodus pereopod 1, secondary unguis on dactylus, and antenna peduncle articles 1-2 shorter than the subequal articles 3-5.

  18. Embriologia do siri Arenaeus cribrarius (Lamarck (Crustacea, Brachyura, Portunidae Embryology of the swimming crab Arenaeus cribrarius (Lamarck (Crustacea, Brachyura, Portunidae

    Directory of Open Access Journals (Sweden)

    Marcelo A.A. Pinheiro

    2002-06-01

    Full Text Available Ovigerous females of Arenaeus cribrarius were collected at Ubatuba, São Paulo, and maintaining in aquaria under controlled temperature (25±1ºC, salinity (35±1‰ and photoperiod (12:12. A small sample of eggs was collected for each 24h, for morphological description, chromatic changes and biometric analysis throughout the embryonic development. Eight egg stages were photographed and had their small and large diameters measured under a microscope provided with camera lucida. The egg's shape was low elliptical during all the embryogenesis and showed size increase (24.4% and volume (91.1 %, when the last stage were compared with the first one. According to mean egg diameter and volume, the eggs should be pooled in three different groups (1-3; 4-6; 7-8 corresponding to initial, intermediate and final stages. The attained results were compared with the literature which emphasizing the species of Portunidae's family.

  19. Reproductive behavior of intertidal hermit crabs (Decapoda, Anomura in southeastern Brazil Comportamento reprodutivo de ermitões (Decapoda, Anomura entremarés no sudeste brasileiro

    Directory of Open Access Journals (Sweden)

    Alexander Turra

    2005-06-01

    Full Text Available The reproductive behavior of four intertidal hermit crab species [Clibanarius antillensis Stimpson, 1859, C. sclopetarius (Herbst, 1796, C. vittatus (Bosc, 1802, and Pagurus criniticornis (Dana, 1852] was studied in São Sebastião Channel, southeastern Brazil. The overall behavior followed previous descriptions for Diogenid and Pagurid hermit crabs but some particular differences were recorded. Male to male agonistic encounters over females and guarding behavior were more common to C. sclopetarius, C. vittatus, and Pagurus criniticornis. During guarding, males clearly grasped females' chelipeds, eyestalks, and the margins of their shell apertures. This oblique guarding and, simultaneously, accessing behavior (OGAP has never been described for hermit crabs and was more common to C. sclopetarius and C. vittatus. Pagurus criniticornis did not present the typical jerking behavior of pagurids. Multiple copulations between a single pair were recorded in all species while in only one occasion a female of C. vittatus was observed copulating with two males. In the post-copulatory behavior males held females for some time and, after that, they were left inactive and sometimes totally to partially buried in the substrate. In mating pairs of all species males were larger than females and two individuals (out of 23 of C. antillensis, one (out of 5 of C. sclopetarius and one (out of 3 of C. vittatus, which courted successfully as males fertilizing females' eggs, were demonstrated to be intersex, with both male and female gonopores.O comportamento reprodutivo de quatro espécies de caranguejos ermitões entremarés [Clibanarius antillensis Stimpson, 1859, C. sclopetarius (Herbst, 1796, C. vittatus (Bosc, 1802 e Pagurus criniticornis (Dana, 1852] foi estudado no Canal de São Sebastião, sudeste brasileiro. O comportamento geral destas espécies seguiu descrições prévias para ermitões das famílias Diogenidae e Paguridae mas algumas diferenças foram registradas. Encontros agonísticos entre machos para disputar fêmeas e o comportamento de guarda foram mais comuns a C. sclopetarius, C. vittatus e Pagurus criniticornis. Durante a guarda os machos claramente tocavam os quelípodos, pedúnculos oculares e as margens da abertura das conchas das fêmeas. Este comportamento de guardar e, simultaneamente, estimular as fêmeas em uma posição oblíqua (OGAP nunca havia sido registrado e, no presente estudo, foi mais conspícuo em C. sclopetarius e C. vittatus. Pagurus criniticornis não apresentou o comportamento típico da família Paguridae denominado "jerking" (machos sacudindo as fêmeas. Cópulas múltiplas em um mesmo par foram registradas para todas as espécies enquanto apenas em uma ocasião uma fêmea de C. vittatus foi copulada por dois machos diferentes. Após a cópula os machos continuavam segurando as fêmeas por algum tempo até que elas eram deixadas inativas e, em algumas vezes, totalmente ou parcialmente enterradas no substrato. Os machos foram maiores que as fêmeas nos pares que acasalaram em todas as espécies estudadas e dois indivíduos (de um total de 23 de C. antillensis, um (de 5 de C. sclopetarius e um (de 3 de C. vittatus, que acasalaram com sucesso fertilizando os ovos das fêmeas, foram identificados como intersexo, com gonóporos tanto maculinos quanto femininos.

  20. Estructura del aparato reproductor masculino de Uca uruguayensis (Decapoda, Ocypodidae) Structure of the male reproductive tract of Uca uruguayensis (Decapoda, Ocypodidae)

    National Research Council Canada - National Science Library

    Elena Irene Cuartas; Ana María Petriella

    El objetivo de este trabajo es describir las estructuras del sistema reproductor de machos de Uca uruguayensis Nobili, 1901 y estudiar los cambios relacionados con la madurez sexual. Se trabajó con observación...