Marochi, Murilo Zanetti
Resumo: Ecomorfologia de caranguejos e siris (CRUSTACEA DECAPODA BRACHYURA) de ecossistemas costeiros. O presente estudo objetivou avaliar se diferentes espécies de Brachyura possuem padrões ecomorfológicos em comum ligados ao habitat em que estão inseridas. Foram analisados 528 exemplares pertencentes a 24 espécies e provenientes dos seguintes ecossistemas costeiros: manguezal, costão rochoso, praia arenosa, bentopelagial e mar aberto. De todos os exemplares foram mensurada...
Fernando L. M. Mantelatto
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 ov
Eduardo D. Spivak
Full Text Available Se compara la fauna de decápodos y las características ambientales de varios estuarios y lagunas costeras del Atlántico sudoccidental, ubicados entre los 25 y los 41°S: Baia de Paranaguá, Manguezal de Itacorubí, Lagoa dos Patos (Brasil, Laguna Castillos (Uruguay, Río de la Plata (Uruguay-Argentina, Laguna Mar Chiquita y Bahía Blanca (Argentina. Se revisa la información sobre historia natural de las especies de cangrejos (Crustacea: Brachyura que los habitan. El número de especies de cangrejos desciende bruscamente entre Itacorubí y Lagoa dos Patos, junto a la disminución de la temperatura mínima del agua. Las bajas temperaturas invernales tienen un efecto directo sobre la fisiología de muchas especies, pero también están relacionadas con la desaparición de los manglares y la variedad de microhabitat que éstos generan. Sin embargo, el efecto de la temperatura no es suficiente para explicar algunos aspectos relacionados con la distribución de las especies y sus historias de vidaEnvironmental aspects and the decapod fauna of several estuaries and coastal lagoons in the southwestern Atlantic, between 25 and 41°S, are compared: Baia de Paranaguá, Manguezal de Itacorubí, Lagoa dos Patos (Brasil, Laguna Castillos (Uruguay, Río de la Plata (Uruguay-Argentina, Laguna Mar Chiquita and Bahía Blanca (Argentina. The information about natural history of crab species (Crustacea: Brachyura from these estuarine systems is reviewed. The number of crab species falls dramatically between Itacorubí and Lagoa dos Patos, together with a fall in minimum water temperature. Low winter temperatures may affect physiological processes of many species and are related to the disappearance of mangroves, and the variety of microhabitat generated by them. However, temperature alone cannot explain several features of species distribution and life history
Guinot, Danièle; Tavares, Marcos; Castro, Peter
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) PMID:26401537
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.
Wagner Cotroni Valenti
Full Text Available In this paper, the relative growth of Macrobrachium acanthurus (Wiegmann, 1836 (Crustacea, Decapoda, Palaemonidae, is presented; the cephalothorax length/abdominal length, telson length/abdominal length and abdominal length/total length relashionships were determined. The adjusted equations showed a isometric growth pattern. There are no changes in these relationships during the animals growth that may be significant in the maximization of the meat's profit.
Sunil, V.; Suryanarayanan, H.
Sciences Vol. 31(1), March 2002, pp. 78-80 Short Communication Breeding biology of shrimp Parapenaeopsis stylifera (Milne Edwards) (Crustacea: Decapoda) along the Neendakara zone, SW coast of India V Sunil* & H Suryanarayanan Department... of this species have also been studied 3,4 . However, the stages of maturity and its relationship with go- nado-somatic index and fecundity of P.stylifera (Milne Edwards) (Crustacea: Decapoda) has not been elucidated. Therefore the present study was conducted...
Saldanha, C.M.; Achuthankutty, C.T.
of Marine Sciences Vol. 29, June 2000, pp. 179-180 Short Communication Growth of hatchery raised banana shrimp Penaeus merguiensis (de Man) (Crustacea:Decapoda) juveniles under different salinity Christina M. Saldanha* & C T Achuthankutty Aquaculture... (8.5 times the initial weight in 4 weeks). The results indicate that this species is suitable for cultivation in high saline waters. Biology of any aquatic organism is profoundly influenced by several abiotic factors and its distribution in any...
Vanessa C. Winter
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
Jugovic, J.; Praprotnik, E.; Buzan, E. V.; Lužnik, M.
Population size estimates are lacking for many small cave–dwelling aquatic invertebrates that are vulnerable to groundwater contamination from anthropogenic activities. Here we estimated the population size of freshwater shrimp Troglocaris anophthalmus sontica (Crustacea, Decapoda, Caridea) based on mark–release–recapture techniques. The subspecies was investigated in Vipavska jama (Vipava cave), Slovenia, with estimates of sex ratio and age distribution. A high abundance of shrimps was found...
Meng, Xian-Liang; Jia, Fu-Long; Liu, Ping; Li, Jian
The complete mitochondrial genome (mitogenome) of the blue swimming crab Portunus pelagicus Linnaeus, 1766 (Crustacea: Decapoda: Portunidae) was determined in this study. The full length mitogenome is 16 157 bp in size, and consists of 13 protein-coding genes, 22 tRNA genes, two rRNA genes, and a non-coding control region, with the base composition of 33.70% for A, 18.99% for C, 12.22% for G, and 35.09% for T. The gene order of P. pelagicus mainly retains as the pancrustacean ground pattern, except for a single translocation of tRNA(His) gene. The mitogenome data provide a basis for further studies on population genetics and phylogenetics. PMID:26171873
Soraya Tatiana M. Alves; Fernando A. Abrunhosa; Jô de F. Lima
The gross morphology of foregut was investigated and described in detail for four freshwater crab species: a pseudothelphusid, Fredius reflexifrons (Ortmann, 1897) and three trichodactylids - Sylviocarcinus pictus (H. Milne-Edwards, 1853), Valdivia serrata White, 1847, and Dilocarcinus septemdentatus (Herbst, 1783). In general, the gastric mills of freshwater crabs showed a similar degree of complexity in relation to other marine species of Anomura and Brachyura previously described in the li...
Yu, Yan-Qin; Liu, Xiao-Li; Li, Hua-Wei; Lu, Bo; Fan, Yu-Peng; Yang, Jin-Shu
In this study we completely determined and analyzed the mitochondrial genome of the Mid-Atlantic Ridge hydrothermal-vent shrimp Rimicaris exoculata (Crustacea: Decapoda: Alvinocarididae). The circular molecule is 15,902 bp in size with an AT content of 65.7%, composed of the same 37 mitochondrial genes as in all other known metazoan mitogenomes. Sequence composition of the R. exoculata mitogenome is exceptionally similar to that of its Indian-Ocean congener R. kairei, which suggests the fact that they might diverge at a quite recent age. The genome exhibits an ancestral pancrustacean arrangement of mitochondrial genes that presents only the translocation/inversion of trnL-UUR from the ancestral arthropod pattern. Determination of the R. exoculata mitogenome can help to resolve the consensus Decapoda tree of life. It also provides more genetic information available for phylogenetics as well as population genetics on this extensively studied species from hydrothermal vents. PMID:25665594
EDUARDO A. BOLLA Jr
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.
Hyun Sook Ko
Full Text Available Two species of crabs, Homola orientalis Henderson, 1888 and Pseudomicippe nipponica (Sakai, 1938, are described and illustrated for the first time in Korea. Homola orientalis was collected at 30 m depth by trap from Busan, and P. nipponica was collected on the intertidal region in Seongsanpo, Jejudo Island. Homola orientalis is the first species of its family in the region. The family Homoldae is characterized by a linea homolica on the carapace and they carry camouflage in the form of sponges or cnidarians with subchelate of the fourth ambulatory legs. The Korean brachyuran fauna now comprises 223 species including the new records from this study.
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 cristae, frontal median triangle, and male first pleopod.
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.
Edilson Pires de Gouvêa
Full Text Available During the study of the Carcinofauna of the Bahian Coast, some Brachyura Portunidae were found. Some of these animals were Callinectes arcuatus Ordway, 1863 which has its distribution restricted to the Pacific Ocean, from California to Peru and the Galapagos Islands. This is the first occurrence of this species reported from the Atlantic Ocean and the Brazilian Coast (Bahia, 38º50'Wand 12º50'S.Durante o estudo da carcinofauna do litoral baiano, muitos Braquiuros Portunidae foram encontrados. Alguns destes animais foram Callinectes arcuatus Ordway, 1863 que possuia sua distribuição restrita da Califórnia ao Peru e Ilhas Galápagos, no Oceano Pacífico. Esta é a primeira ocorrência desta espécie no Oceano Atlântico e na Costa Brasileira. (Bahia, 12º50'S e 38º50'W.
Alessandra Batista Bentes
Full Text Available For the first time specimens of Charybdis hellerii (Milne Edwards 1867, an Indo Pacific specie, were caught in Amazon estuary, Bragança, Pará, North of Brazil. Palavras-chave: Crustacea, Charybdis hellerii , Amazonian Estuary. DOI: http://dx.doi.org/10.18561/2179-5746/biotaamazonia.v3n3p181-184
Ligia Coletti Bernadochi
Full Text Available The composition and seasonal variation of brachyuran and anomuran species associated with mussel farms were evaluated at Praia da Cocanha, São Paulo between May 2007 and February 2008. Nine mussel ropes were sampled at random in each quarter, and 1,208 organisms were identified, comprising five families and 28 species. The most numerous species was the porcellanid Pachycheles laevidactylus (18.5%, followed by the xanthids Acantholobulus schmitti (16.6%, Hexapanopeus paulensis (11.3%, Panopeus americanus (10.2%, and Menippe nodifrons (8.4%. The exotic crab Charybdis hellerii was recorded throughout the study period. The ecological descriptors, except Pielou evenness index, varied significantly over the time. The highest abundance and diversity of the species were recorded during November and February. This pattern was reversed for Berger-Parker dominance, with the lowest values recorded in February. The development of epifauna was correlated with the different stages of the mussel farms, since the mean size of mussels and consequently the abundance of epibiotic organisms and the structural complexity on the mussel ropes increased from May (seeding until February (harvest. Despite this, the temporal population variations in recruitment patterns of the different epibionts should not be overlooked. The results indicated that the mussel farms provided favorable conditions for the development of these crustacean groups, which could be used in environmental monitoring programs and / or be exploited for the aquarium trade.
Ng, Peter K L
A new species of potamid freshwater crab, Malayopotamon weh sp. nov., is described from the island of Pulau Weh off northern Sumatra, Indonesia. The species superficially resembles three Sumatran species: M. batak Ng & Wowor, 1991, M. tobaense (Bott, 1968), and M. turgeo Ng & Tan, 1999, but can easily be distinguished by various carapace as well as gonopod characters. PMID:24871194
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 Africa. The Atlantic Ocean islands of Sherbro, Bioko, Príncipe, and São Tomé support five species of Potamonautidae, while the Western Indian Ocean islands of the Seychelles, Zanzibar, Pemba, Mafi...
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.
Padate, V.P.; Rivonker, C.U.; Anil, A.C.; Sawant, S.S.; Venkat, K.
...……………Charybdis (Charybdis) hellerii (A. Milne Edwards, 1867). - Median and sub-median frontal teeth broadly rounded, medians project slightly in advance of sub-medians; posterior margin of propodus of natatory leg smooth……………………………Charybdis (Charybdis) spinifera (Miers..., 1884). 15. Posterior margin of propodus of natatory leg serrated……………………..……16. - Posterior margin of propodus of natatory leg smooth………….……………….21. 16. All frontal teeth sharply triangular………………………..……………..Charybdis (Charybdis) acuta (A. Milne...
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.
A new species of gecarcinucid freshwater crab, Thelphusula styx spec. nov., is described from Gunong Mulu National Park in Sarawak, Borneo. This is the third species of Thelphusula reported from the area.
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.
Full Text Available Crustaceans have to cyclically replace their rigid exoskeleton in order to grow. Most of them harden this skeleton by a calcification process. Some decapods (land crabs, lobsters and crayfish elaborate calcium storage structures as a reservoir of calcium ions in their stomach wall, as so-called gastroliths. For a better understanding of the cyclic elaboration of these calcium deposits, we studied the ultrastructure of gastroliths from freshwater crayfish by using a combination of microscopic and physical techniques. Because sugars are also molecules putatively involved in the elaboration process of these biomineralizations, we also determined their carbohydrate composition. This study was performed in a comparative perspective on crayfish species belonging to the infra-order Astacidea (Decapoda, Malacostraca: three species from the Astacoidea superfamily and one species from the Parastacoidea superfamily. We observed that all the gastroliths exhibit a similar dense network of protein-chitin fibers, from macro- to nanoscale, within which calcium is precipitated as amorphous calcium carbonate. Nevertheless, they are not very similar at the molecular level, notably as regards their carbohydrate composition. Besides glucosamine, the basic carbohydrate component of chitin, we evidenced the presence of other sugars, some of which are species-specific like rhamnose and galacturonic acid whereas xylose and mannose could be linked to proteoglycan components.
The amateur naturalist S. Hailstone, who lived in Hastings, England, was much interested in the Crustacea of his area and made collections of these. At several occasions in 1834 and 1835 he sent observations on interesting specimens, often together with the material, to J. C. Loudon, the editor of "
Marina S.L.C. Araújo
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.
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
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.
El rol de Cyrtograpsus angulatus (Crustacea; Brachyura en los ciclos de vida de Microphallus szidati (Digenea; Microphallidae y Falsifilicollis chasmagnathi (Acanthocephala; Filicollidae: algunos aspectos de su ecologia parasitaria The role of Cytograpsus angulatus (Crustacea; Brachyura in the life cycles of Microphallus szidati (Digenea; Microphallidae and Falsifilicollis chasmagnathi (Acanthocephala; Filicollidae: some aspects of their ecological parasitology
Sergio R. Martorelli
in the females (Spivak & Politis, in press appeared correlated with prevalence; c in the studied crabs the pervalence fo F. chasmagnathi is higher in males than in females; d the intensity did not appear correlated with size and sex of the intermediate host; e M. szidati and F. chasmagnathi are closely associated with the intermediate host; f C. angulatus and Himantopus melanurus Vieillot, 1817 (Aves; Recurvirostridae are reported as new intermediate and definitive hosts, respectively, for F. chasmagnathi; g Chasmagnathus granulata Dana, 1851 (Cruscea; Brachyura is reported as new intermediate host for M. szidati.
Simeó, Carles G; Kurtz, Kathryn; Chiva, Manel; Ribes, Enric; Rotllant, Guiomar
This study describes spermatogenesis in a majid crab (Maja brachydactyla) using electron microscopy and reports the origin of the different organelles present in the spermatozoa. Spermatogenesis in M. brachydactyla follows the general pattern observed in other brachyuran species but with several peculiarities. Annulate lamellae have been reported in brachyuran spermatogenesis during the diplotene stage of first spermatocytes, the early and mid-spermatids. Unlike previous observations, a Golgi complex has been found in mid-spermatids and is involved in the development of the acrosome. The Golgi complex produces two types of vesicles: light vesicles and electron-dense vesicles. The light vesicles merge into the cytoplasm, giving rise to the proacrosomal vesicle. The electron-dense vesicles are implicated in the formation of an electron-dense granule, which later merges with the proacrosomal vesicle. In the late spermatid, the endoplasmic reticulum and the Golgi complex degenerate and form the structures-organelles complex found in the spermatozoa. At the end of spermatogenesis, the materials in the proacrosomal vesicle aggregate in a two-step process, forming the characteristic concentric three-layered structure of the spermatozoon acrosome. The newly formed spermatozoa from testis show the typical brachyuran morphology. PMID:19885918
Simeó, Carles G; Kurtz, Kathryn; Rotllant, Guiomar; Chiva, Manel; Ribes, Enric
This study describes the morphology of the sperm cell of Maja brachydactyla, with emphasis on localizing actin and tubulin. The spermatozoon of M. brachydactyla is similar in appearance and organization to other brachyuran spermatozoa. The spermatozoon is a globular cell composed of a central acrosome, which is surrounded by a thin layer of cytoplasm and a cup-shaped nucleus with four radiating lateral arms. The acrosome is a subspheroidal vesicle composed of three concentric zones surrounded by a capsule. The acrosome is apically covered by an operculum. The perforatorium penetrates the center of the acrosome and has granular material partially composed of actin. The cytoplasm contains one centriole in the subacrosomal region. A cytoplasmic ring encircles the acrosome in the subapical region of the cell and contains the structures-organelles complex (SO-complex), which is composed of a membrane system, mitochondria with few cristae, and microtubules. In the nucleus, slightly condensed chromatin extends along the lateral arms, in which no microtubules have been observed. Chromatin fibers aggregate in certain areas and are often associated with the SO-complex. During the acrosomal reaction, the acrosome could provide support for the penetration of the sperm nucleus, the SO-complex could serve as an anchor point for chromatin, and the lateral arms could play an important role triggering the acrosomal reaction, while slightly decondensed chromatin may be necessary for the deformation of the nucleus. PMID:19885919
Environmental factors influencing the distribution of three species within the genus Persephona Leach, 1817 (Crustacea, Decapoda, Leucosiidae in two regions on the northern coast of São Paulo State, Brazil
Rafaela T Pereira
Full Text Available Patterns of spatio-temporal distribution of Brachyura are determined by the interaction among life history traits, inter and intraspecific relationships, as well as by the variation of abiotic factors. This study aimed to characterize patterns of spatio-temporal distribution of Persephona lichtensteinii, Persephona mediterranea and Persephona punctata in two regions of the northern coast of São Paulo State, southeastern region of Brazil. Collections were done monthly from July 2001 to June 2003 in Caraguatatuba and Ubatuba, using a shrimp fishery boat equipped with double-rig nets. The patterns of species distribution were tested by means of redundancy analysis (RDA and generalized linear mixed models (GLMM in relation to the recorded environmental factors (BT: bottom temperature, BS: bottom salinity, OM: organic matter and granulometry (Phi. The most influent environmental factor over the species distribution was the Phi, and the ascendant order of influence was P. lichtensteinii, P. punctata and P. mediterranea. The greater abundance of P. mediterranea showed a conservative pattern of distribution for the genus in the sampled region. The greater occurrence of P. punctata and P. lichtensteinii, in distinct transects than those occupied by P. mediterranea, seems to be a strategy to avoid competition among congeneric species, which is related to the substratum specificity.
Marcelo A.A. Pinheiro
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.
Marcelo A. A. Pinheiro; Gustavo Yomar Hattori
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 w...
Irene A. Cardoso
Full Text Available During the Campos Basin Deep Sea Environmental Project coordinated by CENPES/PETROBRAS two collecting campaigns were performed. Both used the N/RB Astrogaroupa and fishery nets to collect samples from the continental slope in Campos Basin, RJ (21º48'S to 22º48'S. Campaign Oceanprof I occurred in February, 2003 and collected 18 samples at depths between 1074 and 1649 m. Oceanprof II occurred in August, 2003 and collected 22 samples at depths between 1059 and 1640 m. A total of 14 caridean species were collected: Parapontophilus sp. (Crangonidae; Glyphocrangon longirostris (Smith, 1882 (Glyphocrangonidae; Lebbeus sp. (Hippolytidae; Nematocarcinus ensifer (Smith, 1882 (Nematocarcinidae; Acanthephyra eximia Smith, 1884; A. quadrispinosa Kemp, 1939; A. stylorostratis (Bate, 1888; Janicella spinicauda (A. Milne Edwards, 1883; Meningodora vesca (Smith, 1887; Notostomus elegans A. Milne Edwards, 1881; Oplophorus spinosus (Brullé, 1839; and Systellaspis debilis (A. Milne Edwards, 1881 (Oplophoridae; Heterocarpus inopinatus Tavares, 1999 and Plesionika sp. (Pandalidae. Three out of these 14 species, Parapontophilus sp., Lebbeus sp. and Plesionika sp. are still under investigation and were not included in the present study. From the 11 species identified Nematocarcinus ensifer is a new record for the Brazilian continental slope.Durante o Projeto de Caracterização Ambiental de Águas Profundas da Bacia de Campos coordenado pelo CENPES/PETROBRAS duas campanhas de coleta foram realizadas. Ambas utilizaram o N/RB Astrogaroupa e redes de pesca de arrasto com porta para coletar amostras do talude continental da Bacia de Campos, RJ (21º48' S a 22º48'S. A campanha Oceanprof I ocorreu em fevereiro de 2003, coletou 18 amostras em profundidades que variaram entre 1074 e 1649 m e a Oceanprof II em agosto de 2003 coletou 22 amostras em profundidades variando entre 1059 e 1640 m. No total, 14 espécies de Caridea foram coletadas: Parapontophilus sp. (Crangonidae; Glyphocrangon longirostris (Smith, 1882 (Glyphocrangonidae; Lebbeus sp. (Hippolytidae; Nematocarcinus ensifer (Smith, 1882 (Nematocarcinidae; Acanthephyra eximia Smith, 1884; A. quadrispinosa Kemp, 1939; A. stylorostratis (Bate, 1888; Janicella spinicauda (A. Milne Edwards, 1883; Meningodora vesca (Smith, 1887; Notostomus elegans A. Milne Edwards, 1881; Oplophorus spinosus (Brullé, 1839; e Systellaspis debilis (A. Milne Edwards, 1881 (Oplophoridae; Heterocarpus inopinatus Tavares, 1999 e Plesionika sp. (Pandalidae. Dentre estas 14 espécies, Parapontophilus sp., Lebbeus sp. e Plesionika sp. estão sendo trabalhadas e não foram incluídas no presente trabalho. Das 11 espécies identificadas, Nematocarcinus ensifer representa uma nova ocorrência para o talude continental brasileiro.
Park, Jay Hee
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.
In 1898 Borradaile described a new species of Coralliocaris from Funafuti, Ellice Islands. The original diagnosis was very short, but one year later Borradaile (1899: 1006, pl. 64 fig. 7) gave a slightly longer description and illustrations. No new finds of the species have been reported upon since
Stewart, B.A.; Gouws, G.
The recent descriptions of Potamonautes dentatus, P. clarus and P. lividus have brought the number of species recorded from KwaZulu-Natal (South Africa) to five, with P. depressus depressus and P. sidneyi having long been known from the province. To determine and quantify levels of genetic differentiation between these species, 14 populations were analysed using allozyme electrophoresis of 14 presumptive loci. Interspecific genetic identity-values ranged between 0.224 and 0.793 (D = ...
Meij, van der S.E.T.; Schubart, C.D.
The enigmatic gall crab family Cryptochiridae has been proposed to be phylogenetically derived from within the Grapsidae (subsection Thoracotremata), based on the analysis of 16S mtDNA of one cryptochirid, Hapalocarcinus marsupialis, among a wide array of thoracotremes, including 12 species of the f
Eduardo D. Spivak
Full Text Available Se mencionan 243 especies de crustáceos decápodos en el Atlántico sudoccidental, entre los 25º y los 55°S, pertenecientes a 49 familias. El suborden Dendrobranchiata incluye 6 familias con 23 especies. El suborden Pleocyemata consta de 10 familias con 35 especies de Caridea, 1 familia con 2 especies de Astacidea, 1 familia con 1 especie de Palinura, 2 familias con 7 especies de Thalassinidea, 8 familias con 44 especies de Anomura y 21 familias con 131 especies de Brachyura. En la región templado cálida del Atlántico sudoccidental se han registrado 200 especies; el 73% de las mismas se extienden hacia el norte de la región en estudio ("especies tropicales", el 27% habitan entre las latitudes de Rio de Janeiro y Tierra del Fuego. De éstas, 44 son endémicas. El número de especies tropicales disminuye con el aumento de la latitud, aunque con diferentes patrones en distintas familias; la expansión hacia el sur parece estar limitada por cambios ambientales entre los 29°-35°S, principalmente el descenso de la temperatura invernal y el efecto del Río de la Plata. La región templado-fría incluye 39 especies, 24 de las cuales habitan también el Pacífico sur. Muchas especies templado-frías (50% alcanzan latitudes menores a 42°S en aguas profundas del Atlántico. Se resumen los datos referidos a la distribución geográfica, ciclos de vida e importancia económica de las especies de la región. El número de especies y familias es similar al que se encuentra en las costas del Pacífico, entre las mismas latitudes, pero existen diferencias en la composición faunísticaA number of 243 species of decapod crustaceans, belonging to 49 families, were found in the southwestern Atlantic, between 25 and 55°S. Suborder Dendrobranchiata includes 6 families with 23 species. Suborden Pleocyemata has 10 families of Caridea with 35 species, 1 family of Astacidea with 2 species, 1 family of Palinura with 1 species, 2 families of Thalassinidea with 7
Cervantes-Martínez, A; Ramírez-González, A
In Florida and Cuba the stone crab Menippe mercenaria (Say, 1818) is under strong fishing-pressure; nevertheless in the Mexican Caribbean it is considered as sub-utilized and poorly known resource. Artificial shelters ("condominios cubanos") were used to study relative abundance, age structure, claw length-carapace amplitude relation, and population in three seasons and four sectors at Bahía Ascension, Quintana Roo, Mexico. The abundance varied according to the sector and sampling season: population was higher in the south and during the north wind ("Nortes") season (January to March). The carapace amplitude was directly proportional to claw length (r2 = 0.83, 0.97 and 0.89; p < 0.05 in females, males and total, respectively). The results suggest that specimens with 37.5 and 67.5 mm of carapace amplitude are the most limited regarding refuge availability in the Bay. PMID:12189819
Jesse, Ruth; Grudinski, Melanie; Klaus, Sebastian; Streit, Bruno; Pfenninger, Markus
The aim of this study was to estimate the influence of the palaeogeographic and climatic history of the Aegean region on the diversity of freshwater crabs of the genus Potamon and to test whether this area served as source or reservoir in species diversity. Necessary species delimitation was accomplished by phylogenetic analyses of the mitochondrial markers COX1 and ND1, partial 16S rRNA gene and the tRNALeu gene. We found 14 genetic lineages of which nine could be assigned to previously recognised species. Temporal estimates of the splitting pattern in the phylogeny of Potamon indicated that a combination of geological and climatic events influenced their diversification. Within Potamon, the lineages separated into a western group and an eastern group. This first split in the genus occurred approximately 8.3-5.5 Mya, thus possibly correlated with the Messinian salinity crisis. A likelihood approach to geographic range evolution suggested for most species, occurring in the Aegean area, an origin in the Middle East. Moreover, there were no insular endemics in the central Aegean archipelago, therefore low sea-levels during the Pleistocene glacial periods possibly enabled dispersal to these islands, but subsequent rise in sea-level did not cause speciation. Nevertheless, the diversification of most lineages occurred during the Pleistocene epoch thus coinciding with Quaternary fluctuations of the climate. PMID:21216297
Lezcano, Aníbal Hernán; Rojas Quiroga, María Laura; Liberoff, Ana Laura; Van der Molen, Silvina
We compared the carapace shape and thickness as well as the energy density of Ovalipes trimaculatus inhabiting areas comprising a gradient of marine pollution: high, moderate and undetected, in the Nuevo gulf (Patagonia Argentina). The carapace shape was evaluated by means of individual asymmetry scores (=fluctuating asymmetry) whereas the carapace thickness was assessed by measuring the carapace dry weight. The energy density was analyzed through its negative relationship with water content in muscle tissue. The individual asymmetry scores as well as the percentage of water content in muscle tissue were proportional to the marine pollution gradient, whereas the carapaces thickness did not differ among sampling sites. Our results are consistent with previous findings and demonstrate the direct effect of marine pollution on other taxa different from gastropods, cephalopods and polyplacophora and add to long-standing concerns about detrimental effects caused by marine pollution on the benthic community of the Nuevo gulf. PMID:25293645
The fossil record of the ghost shrimp genus Balsscallichirus Sakai, 2011 (Crustacea: Decapoda: Callianassidae) is revised. Barnardcallichirus Sakai, 2011 and Tirmizicallichirus Sakai, 2011 are considered subjective synonyms of Balsscallichirus. Based on the examination of extant species it is argued that the morphology of the major cheliped merus, in combination with other hard part morphology characters, is sufficient for assignment of the fossil material into the genus. Main identifying characters are on merus which is keeled along its midline and its lower half is tuberculated; its lower margin possesses broad proximal meral hook continuing into a lobe distally; the entire lower margin is subdivided into numerous irregularly spaced spines. Three species, Callianassa sismondai A. Milne-Edwards, 1860, C. floriana Glaessner, 1928, and Podocallichirus laepaensis Hyžný & Muñiz, 2012, originally described from the Miocene of Italy, Austria and Spain, respectively, are assigned to Balsscallichirus herein. Neocallichirus wellsi Schweitzer, Feldmann & Gingerich, 2004 from the Upper Eocene of Pakistan is tentatively assigned to that genus as well. Spatial and temporal distribution of the genus indicates that at least since the Oligocene, and possibly even sooner (the Late Eocene), the genus has been restricted to the Western Tethys Region. Later, it migrated also into West Atlantic establishing present day communities. PMID:27499568
Estrutura populacional e biologia reprodutiva de Parastacus defossus (Crustacea: Decapoda: Parastacidae Population structure and reproductive biology of Parastacus defossus (Crustacea: Decapoda: Parastacidae
Clarissa K. Noro
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.
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
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.
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.
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.
Gustavo Augusto S. de Melo; Thais Brandini Crivelaro
During the project GEDIP, in the coast of the State of Rio Grande do Sul, with some stations off Uruguay, a specimen female of the brachyuran crab Lepteces ornatus Rathbun, 1893 was found. Up till now this species was known only by his type material, from Arrowsmith Bank, Yukatan, Mexico. Description, material examined and distribution are done.
Gustavo Augusto S. de Melo
Full Text Available During the project GEDIP, in the coast of the State of Rio Grande do Sul, with some stations off Uruguay, a specimen female of the brachyuran crab Lepteces ornatus Rathbun, 1893 was found. Up till now this species was known only by his type material, from Arrowsmith Bank, Yukatan, Mexico. Description, material examined and distribution are done.
Primeira ocorrência de Polybius navigator (Herbst) (Decapoda, Brachyura, Portunidae) no Atlântico ocidental First occurrence of Polybius navigator (Herbst) (Decapoda, Brachyura, Portunidae) in Western Atlantic
Gustavo Augusto Schmidt de Melo; Thais Brandini Crivelaro
Among the portunid crabs collected during the Ilha Grande Project (1966-1969), one specimen of Polybius navigator (Herbst, 1794) was found. This species formerly known from the Eastern Atlantic, Mediterranean and Adriatic and Black Seas is redescribed, illustrated and comments on the new status of the genus is done. It is the first record of this species for the Brazilian coast and Western Atlantic.
Primeira ocorrência de Polybius navigator (Herbst (Decapoda, Brachyura, Portunidae no Atlântico ocidental First occurrence of Polybius navigator (Herbst (Decapoda, Brachyura, Portunidae in Western Atlantic
Gustavo Augusto Schmidt de Melo
Full Text Available Among the portunid crabs collected during the Ilha Grande Project (1966-1969, one specimen of Polybius navigator (Herbst, 1794 was found. This species formerly known from the Eastern Atlantic, Mediterranean and Adriatic and Black Seas is redescribed, illustrated and comments on the new status of the genus is done. It is the first record of this species for the Brazilian coast and Western Atlantic.
Observações sobre a ocorrência de Pilumnus floridanus Stimpson (Decapoda, Brachyura, Pilumnidae na costa do Rio de Janeiro, Brasil Remarks about the Pilumnus floridanus Stimpson (Decapoda, Brachyura, Pilumnidae occurrence in Rio de Janeiro coast, Brazil
Lydia M. S. Oliveira
Full Text Available Os espécimes foram coletados na Baía de Sepetiba, Rio de Janeiro no inverno. Sua distribuição era conhecida para Off Cape Lookout, Carolina do Norte até a Flórida, Golfo do México, Canal de Yucatan, Honduras, Antilhas, Venezuela e Brasil (Alagoas, Sergipe e Bahia.The specimens were collected in Sepetiba Bay during the winter. Their distribution was formerly known from Off Cape Lookout, North Carolina until Florida, Gulf of Mexico, Yucatan Channel, Honduras, Antilles, Venezuela and Brazil (Alagoas, Sergipe and Bahia.
Sacculina nectocarcini, a new species of rhizocephalan, a new species of rhizocephalan(Cirripedia: Rhizocephala) parasitising the red rock crabNectocarcinus integrifrons (Decapoda: Brachyura: Portunidae)(Decapoda: Brachyura: Portunidae)
Gurney, Robert H.; Rybakov, Alexey V.; Høeg, Jens Thorvald;
The parasitic barnacles, Rhizocephala, are a little known group within Australia with only seven described species from a coastline stretching approximately 59763 km. This study describes a new species of Rhizocephala, Sacculina nectocarcini. The description is based on a unique combination of...
Estrutura populacional de Armases angustipes (Dana) (Decapoda, Brachyura, Grapsidae) na Ilha do Farol, Matinhos, Paraná Population structurc of Armases angustipes (Dana) (Decapoda, Brachyura, Grapsidae) from Farol Island, Matinhos, Paraná
Vânia G.L. Kowalczuk; Setuko Masunari
Annual fluetuation of densities and population strueture of Armases angustipes (Dana, 1852) from a rocky shore at Farol Island, Matinhos, Paraná, Brazil (25º51'S and 48º32'W) were studied. The population strueture was treated in the following aspects: sexual proportion, dial intensity of activities, size composition and its fluetuation, and general condition of the crabs. The collections were made monthly, from January to December 1991. The samples were obtained handly, in the morning and at ...
Estrutura populacional de Armases angustipes (Dana (Decapoda, Brachyura, Grapsidae na Ilha do Farol, Matinhos, Paraná Population structurc of Armases angustipes (Dana (Decapoda, Brachyura, Grapsidae from Farol Island, Matinhos, Paraná
Vânia G.L. Kowalczuk
Full Text Available Annual fluetuation of densities and population strueture of Armases angustipes (Dana, 1852 from a rocky shore at Farol Island, Matinhos, Paraná, Brazil (25º51'S and 48º32'W were studied. The population strueture was treated in the following aspects: sexual proportion, dial intensity of activities, size composition and its fluetuation, and general condition of the crabs. The collections were made monthly, from January to December 1991. The samples were obtained handly, in the morning and at night, at the supratidal zone during low tides. There were caught 1,139 crabs, among which 34 were juveniles, 544 males, 555 females and 4 ovigerous females. Population density was highest in April (19.56 ind.m"² and in October (23.86 ind.m"² . The sexual proportion was 1:1 in eleven months. Although the male crabs were more abundant than the females in May, there was not any statistical significam difference between the sexes. The activity of the population is intenser at night than at morning for both sexes. The recruitment of juveniles oceurs mainly in March, April and July. The condition factor in females is related to the reproduetive period. The population can migrate to the terrestrial habitat near the supratidal zone.
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
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.
Marco-Herrero, Elena; González-Gordillo, J. Ignacio; Cuesta, José A.
The morphology of the megalopa stage of the panopeid Rhithropanopeus harrisii is redescribed and illustrated in detail from plankton specimens identified by DNA barcode (16S mtDNA) as previous descriptions do not meet the current standard of brachyuran larval description. Several morphological characters vary widely from those of other panopeid species which could cast some doubt on the species' placement in the same family. Besides, some anomalous megalopae of R. harrisii were found among specimens reared at the laboratory from zoeae collected in the plankton. These anomalous morphological features are discussed in terms of problems associated with laboratory rearing conditions.
Simeó, C G; Ribes, E; Rotllant, G
The morphology and function of the male reproductive system in the spider crab Maja brachydactyla, an important commercial species, is described using light and electron microscopy. The reproductive system follows the pattern found among brachyuran with several peculiarities. The testis, known as tubular testis, consists of a single, highly coiled seminiferous tubule divided all along by an inner epithelium into germinal, transformation, and evacuation zones, each playing a different role during spermatogenesis. The vas deferens (VD) presents diverticula increasing in number and size towards the median VD, where spermatophores are stored. The inner monostratified epithelium exocytoses the materials involved in the spermatophore wall formation (named substance I and II) and spermatophore storage in the anterior and median VD, respectively. A large accessory gland is attached to the posterior VD, and its secretions are released as granules in apocrine secretion, and stored in the lumen of the diverticula as seminal fluids. A striated musculature may contribute to the formation and movement of spermatophores and seminal fluids along the VD. The ejaculatory duct (ED) shows a multilayered musculature and a nonsecretory pseudostratified epithelium, and extrudes the reproductive products towards the gonopores. A tissue attached to the ED is identified as the androgenic gland. PMID:19342069
Tiago Rozário da Silva
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.
de Magalhães Henrique
Full Text Available Abstract Background This article records the traditional knowledge of crab gatherers in the city of Conde, in the North Coast Region of Bahia State, Northeastern Brazil. Methods Data on biological and ecological aspects of economically important brachyuran crustaceans have been obtained from semi-structured interviews and in loco observations conducted from September 2007 to December 2009. A total of 57 fishermen of both genders, aged between 10 and 78 years have been interviewed (individually or collectively in different contexts; interviewees were asked about aspects such as external morphology, life cycle, trophic ecology, and spatial and temporal distribution of the major economically important brachyuran crustaceans in the region. Seven fishing communities were visited: Siribinha, Sítio do Conde, Poças, Ilha das Ostras, Cobó, Buri and Sempre Viva. Data were analyzed by comparing the information provided by participants with those from the specialized academic literature. Results The results show that artisanal fishermen have a wide ranging and well-grounded knowledge on the ecological and biological aspects of crustaceans. Crab gatherers of Conde know about growth and reproductive behavior of the animals they interact with, especially with regard to the three major biological aspects: “molt”, “walking dance” and “spawning”. Conclusion This knowledge constitutes an important source of information that should be considered in studies of management and sustainable use of fishery resources in the North Coast Region of Bahia State.
Meng, Xianliang; Jia, Fulong; Zhang, Xiaohui; Liu, Ping; Li, Jian
The three-spot swimming crab Portunus sanguinolentus (Herbst, 1783) is a commercially important fishery species, widely distributed in the Indo-Pacific region. In this study, we present the complete mitochondrial genome of P. sanguinolentus. The genome is 16 027 bp in length with circular organization, encoding the standard set of 13 protein-coding genes, 22 tRNA genes, and two rRNA genes. The overall A + T content is 65.60%, which is lower than that of its congeneric species Portunus pelagicus and Portunus trituberculatus. The mitogenome carries 1254 bp of intergenic region constituting 7.82% of the genome, and six pairs of overlapping genes with the overlap size from 1 to 7 bp. The complete mitogenome sequence information of P. sanguinolentus would provide useful data for further studies on population genetics and molecular systematics. PMID:26153754
SHEN Xin; TIAN Mei; YAN Binlun; CHU Kahou
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
Full Text Available Abstract Background Transposable elements are major constituents of eukaryote genomes and have a great impact on genome structure and stability. Considering their mutational abilities, TEs can contribute to the genetic diversity and evolution of organisms. Knowledge of their distribution among several genomes is an essential condition to study their dynamics and to better understand their role in species evolution. DIRS1-like retrotransposons are a particular group of retrotransposons according to their mode of transposition that implies a tyrosine recombinase. To date, they have been described in a restricted number of species in comparison with the LTR retrotransposons. In this paper, we determine the distribution of DIRS1-like elements among 25 decapod species, 10 of them living in hydrothermal vents that correspond to particularly unstable environments. Results Using PCR approaches, we have identified 15 new DIRS1-like families in 15 diverse decapod species (shrimps, lobsters, crabs and galatheid crabs. Hydrothermal organisms show a particularly great diversity of DIRS1-like elements with 5 families characterized among Alvinocarididae shrimps and 3 in the galatheid crab Munidopsis recta. Phylogenic analyses show that these elements are divergent toward the DIRS1-like families previously described in other crustaceans and arthropods and form a new clade called AlDIRS1. At larger scale, the distribution of DIRS1-like retrotransposons appears more or less patchy depending on the taxa considered. Indeed, a scattered distribution can be observed in the infraorder Brachyura whereas all the species tested in infraorders Caridea and Astacidea harbor some DIRS1-like elements. Conclusion Our results lead to nearly double both the number of DIRS1-like elements described to date, and the number of species known to harbor these ones. In this study, we provide the first degenerate primers designed to look specifically for DIRS1-like retrotransposons. They
Maturidade sexual do caranguejo Armases rubripes (Rathbun (Crustacea, Brachyura, Sesarmidae na Baía de Sepetiba, Rio de Janeiro, Brasil Sexual maturity of the crab Armases rubripes (Rathbun (Crustacea, Brachyura, Sesarmidae in Sepetiba Bay, Rio de Janeiro, Brazil
Giovana V. Lima
Full Text Available Objetivou-se analisar a maturidade sexual de Armases rubripes (Rathbun, 1897 em três diferentes ambientes (rio, praia arenosa e manguezal no sudeste do Brasil. Os caranguejos foram coletados mensalmente de julho/2002 a fevereiro/2004, utilizando-se peneiras no Rio Sahy durante as marés altas e, manualmente, na praia e no manguezal, durante as marés baixas. Os animais foram capturados por dois coletores num esforço de 15 minutos por estação de coleta. No laboratório, os exemplares foram separados por sexo e mensurados em relação a largura da carapaça, do abdome e comprimento do gonopódio. As gônadas, gonopódios e o abdome foram analisados segundo sua forma e seu aspecto. Um total de 4.051 indivíduos foram amostrados (1.067 machos, 1.563 fêmeas e 1.421 juvenis. Foram determinados cinco morfotipos: juvenis, machos imaturos, fêmeas imaturas, machos maduros e fêmeas maduras. O início da maturidade sexual fisiológica e morfológica ocorreu de forma assíncrona, com machos produzindo gametas mais cedo que as fêmeas. O tamanho da primeira maturidade sexual apresentou diferença significativa entre os ambientes analisados, exceção observada para o manguezal. Os indivíduos obtidos no manguezal apresentaram menores tamanhos para o início da maturidade sexual. Embora, estimados os tamanhos da maturidade sexual morfológica de machos e fêmeas, a análise do crescimento alométrico foi inadequado para a espécie.The present study analyzed the sexual maturity of Armases rubripes (Rathbun, 1897 in three populations from different environmental conditions (river, beach and mangrove in the southeastern Brazilian coast. Crabs were sampled monthly from July 2002 to February 2004; they were captured with sieves at Sahy River, during the high tides, and by hand at beach and mangrove areas, during low tides. Animals were captured by establishing a catch effort of two collectors during 15 minutes for each station. At laboratory, all individuals were sexed and the carapace width measured. The gonads, gonopods and abdomen morphology were observed according to shape and macroscopic aspects. A total of 4,051 specimens were sampled (1,067males, 1,563 females and 1,421 juveniles. There were recognized five morphotypes: juveniles, immature males, immature females, mature males and mature females. The onset of physiological and morphological sexual maturity was asynchronous within sexes, of which, males reaching the ability to produce gametes earlier than females. The size at the onset of sexual maturity was significantly different among populations different coming from areas, except for mangrove area. The individuals obtained from mangrove showed the shortest size at the onset of sexual maturity. Therefore, estimates of males and females sizes at morphological sexual maturity the allometric growth analyses are inadequate in this species.
Condition factor of Goniopsis cruentata (Crustacea, Brachyura, Grapsidae from Mundaú/Manguaba estuarine complex, Alagoas, Brazil Fator de condição de Goniopsis cruentata (Crustacea, Brachyura, Grapsidae do complexo estuarino Mundaú/Manguaba, Alagoas, Brasil
José J. P. R. Lira
Full Text Available The condition factor is a parameter which acts as a general indicator of the "well-being" of a species, and it can be obtained through the analysis of width vs. weight relationships. The present work aims to investigate size vs. weight relationship and the condition factor of the crab Goniopsis cruentata (Latreille, 1803. The study area was the Mundaú/Manguaba estuarine complex, Maceió, state of Alagoas, Northeast Brazil. Samplings were monthly accomplished from August 2007 to July 2008. A total of 626 individuals were analyzed, being 309 males and 317 females. Males were larger and heavier than females, what is expected in many brachyuran. The growth was positive allometric to both males (b = 3.42 and females (b = 3.30, not obeying the "cube law". The condition factor of female was higher than that of male crabs, probably due to the gonad weight of females. It also varied seasonally for both sexes, being higher in the autumn and winter in males, and in the autumn and spring in females, and related to the molt and period of spawning intensification.O fator de condição é um parâmetro que age como um indicador geral do "bem-estar" de uma espécie e pode ser obtido através da análise da relação largura-peso. O presente trabalho visa investigar a relação tamanho vs. peso e o fator de condição do caranguejo Goniopsis cruentata (Latreille, 1803. A área de estudo foi o complexo estuarino Mundaú/Manguaba, Maceió, estado de Alagoas, Nordeste do Brasil. As amostragens foram realizadas mensalmente de agosto de 2007 a julho de 2008. Um total de 626 indivíduos foi analisado, sendo 309 machos e 317 fêmeas. Os machos foram maiores e mais pesados que as fêmeas, o que é esperado em muitas espécies de braquiúros. O crescimento foi alométrico positivo tanto para machos (b = 3,42 quanto para fêmeas (b = 3,30, não obedecendo a "regra do cubo". O fator de condição da fêmea foi maior do que o dos machos, provavelmente devido ao peso das gônadas das fêmeas. O fator de condição também variou sazonalmente para ambos os sexos, sendo mais elevado no outono e no inverno nos machos, e no outono e primavera nas fêmeas, e estando relacionado à muda e ao período intenso de desova.
The megalopa and early juvenile development of Hepatus pudibundus (Crustacea: Brachyura: Aethroidea reared from neuston samples A megalopa e o desenvolvimento juvenil inicial de Hepatus pudibundus (Crustacea: Brachyura: Aethroidea criado a partir de amostras de neuston
Maria L. Negreiros-Fransozo
Full Text Available Hepatus pudibundus (Herbst, 1785 is a crab commonly found in shallow waters of the Western Atlantic. Its larval and early post-larval morphology have already been described from laboratory hatched material. Around 200 megalopae of H. pudibundus were collected in neuston samples from the Ubatuba region, Brazil, during the summer of 2005-2006 and were successfully reared under laboratory conditions. The size of the megalopae obtained in the neuston was similar to those specimens previously described in the literature, except that the juvenile crab stages reared in the laboratory were slightly larger, probably due to the better feeding conditions in the laboratory. The duration of the juvenile stages was shorter in the present study than in previous attempts at laboratory rearing, even if conditions appeared to be similar. The main differences observed between studies were in megalopal morphology, which may be attributable to intraspecific variation but, possibly, also due to differences in levels of detail than previously performed.Hepatus pudibundus (Herbst, 1785 é um caranguejo comumente encontrado em águas rasas do Atlântico Ocidental. O desenvolvimento larval completo e a sua morfologia pós-larval já são conhecidos a partir de fêmeas ovígeras. Cerca de 200 megalopas de H. pudibundus foram coletadas no neuston durante o verão de 2005-2006, na região de Ubatuba, São Paulo, Brasil e criadas com sucesso sob condições de laboratório. O tamanho da megalopa obtida no neuston foi semelhante àquela dos exemplares descritos previamente na literatura, mas os estágios juvenis criados no laboratório foram ligeiramente maiores na fase inicial, provavelmente devido às melhores condições de alimentação no laboratório. A duração dos estágios juvenis foi menor na presente investigação, do que no estudo anterior, mesmo sob condições laboratoriais similares. As principais diferenças entre os estudos foram com relação à morfologia da megalopa, as quais podem ser atribuídas às variações intra-específicas, mas possivelmente, também, ao nível de detalhe empregado previamente.
Aspectos reprodutivos de Goniopsis cruentata (Latreille (Crustacea, Brachyura, Grapsidae na Baía de Sepetiba, Rio de Janeiro, Brasil Reproductive aspects of Goniopsis cruentata (Latreille (Crustacea, Brachyura, Grapsidae at the Sepetiba Bay, Rio de Janeiro, Brazil
Zilanda de Souza Silva
Full Text Available The objective of this study was to get some knowledge about the reproductive aspects of Goniopsis cruentata (Latreille, 1803, concerning through sex ratio, morphological sexual maturity, reproductive period, fecundity and eggs size. The crabs were collected monthly in Itacuruçá's Mangroves from November, 1997 to November, 1998. Four hundred and seven crabs were caught and they were 47% males, 36% females and 17% ovigerous females. The sex ratio was 1:1.13 (male:female (X²= 1.54, p > 0.05. The relation of abdomen width (AW and carapace width (CW in females showed a positive allometric grow (b = 1.36, it suggests the size onset of maturity occur from 26.0 a 29.0 mm (CW in females. The ovigerous females occured during all the research period, except for the winter months (June to August. The size of these ovigerous females varied from 26.0 to 48.8 mm with mean size 35.1 + 5.2 mm. Individual fecundity varied from 29,975 to 142,050 eggs and mean fecundity was 74,751 ± 27 eggs. The mean diameter of the eggs was 300 ± 20 µm.
Nicola C Dobson
Full Text Available Symbiosis is prevalent in the marine environment with many studies examining the effects of such interactions between host and symbiont. Pontoniine shrimps are a group whose ecology is characterised by symbiotic interactions. This investigation examines the gross morphology of Pontoniinae compound eyes and superficial optical parameters with reference to their symbiotic relationship or lifestyle category; free-living, ectosymbiont, endosymbiont (bivalves or endosymbiont (non-bivalves. The eye morphologies of free-living and ectosymbiotic species are very similar, yet differ from both forms of endosymbiotic species. Endosymbionts have significantly smaller and simpler eyes with larger facets and bigger interommatidial angles and eye parameters for increased sensitivity levels. However bivalve endosymbionts form an intermediary group between non-bivalve endosymbionts and ectosymbionts as a result of their more active lifestyle. The accessory eye or "nebenauge", although of uncertain function, commonly occurs in free-living Pontoniinae species but rarely in endosymbionts apart from in more primitive species. The variation in morphology reflects tensions between functional requirements and ecological pressures that have strongly influenced eye design in Pontoniinae.
Luz Amelia Vega-Pérez
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.
Carreto, J.I.; Carignan, M.O.
Caronetoids from caparace and internal organs of Artemesia longinaris were isolated and identified. The following carotenoid pigments were found in caparace: luteine, tunaxanthin diester, astaxanthin monoester and free astaxanthin. A much greater variety of pigments was isolated from internal organs: Ó- doradexanthin, a fucoxanthin derivate, chlorophylls degradation products and various xanthophylls in trace amounts. These pigments are of dietary origin. In the natural environment, A.longinar...
Gan, Han Ming; Tan, Mun Hua; Eprilurahman, Rury; Austin, Christopher M
The complete mitochondrial genome of a highland freshwater crayfish, Cherax monticola, was recovered by shotgun sequencing. The mitogenome consists of 15,917 base pairs containing 13 protein-coding genes, 2 ribosomal subunit genes, 22 transfer RNAs and a non-coding AT-rich region. The base composition of C. monticola is 33.46% for T, 21.48% for C, 33.71% for A and 11.35% for G, with an AT bias of 67.17%. PMID:24617471
Austin, Christopher M; Tan, Mun Hua; Croft, Laurence J; Gan, Han Ming
The complete mitochondrial genome of Cherax glaber was sequenced using the HiSeq platform. The mitogenome consists of 15,806 base pairs containing 13 protein-coding genes, 2 ribosomal subunit genes, 22 transfer RNAs and a non-coding AT-rich region. The Cherax glaber has a base composition of 32.39% for T, 22.42% for C, 33.73% for A and 11.46% for G, with an AT bias of 66.12%. PMID:24484586
Gan, Han Ming; Tan, Mun Hua; Austin, Christopher M
The commercial freshwater crayfish Cherax quadricarinatus complete mitochondrial genome was recovered from partial genome sequencing using the MiSeq Personal Sequencer. The mitogenome has 15,869 base pairs consisting of 13 protein-coding genes, 2 ribosomal subunit genes, 22 transfer RNAs, and a non-coding AT-rich region. The base composition of C. quadricarinatus is 32.16% for T, 23.39% for C, 33.26% for A, and 11.19% for G, with an AT bias of 65.42%. PMID:24617485
Austin, Christopher M; Tan, Mun Hua; Croft, Laurence J; Gan, Han Ming
The complete mitochondrial genome of Cherax cainii was recovered from partial genome sequencing data using the HiSeq platform. The mitogenome consists of 15,801 base pairs (69% A + T content) containing 13 protein-coding genes, 2 ribosomal subunit genes, 22 transfer RNAs and a 783 bp non-coding AT-rich region. This is the second completely sequenced mitogenome from the genus Cherax after the first reported Cherax destructor mitogenome nearly a decade ago. PMID:24438281
Kim, Sanghee; Lee, Sang-Hwa; Park, Mi-Hyun; Choi, Han-Gu; Park, Joong-Ki; Min, Gi-Sik
Although relatively a large number of the complete mitochondrial genome sequences have been determined from various decapod species (29 mtDNA sequences reported so far), the information for the infraorder Astacidea (including lobsters, crayfishes, and their relatives) is very limited and represented by only one complete sequence from the Australian freshwater crayfish species Cherax destructor. In this study, we determined the complete mitochondrial DNA sequence of Homarus americanus, the first representative of the family Nephropidae to be fully characterized. Comparison of the gene arrangement reveals that H. americanus mtDNA is identical to those of other pancrustacean species but differs from the other astacidean species (C. destructor). Based on these data, it can be assumed that an idiosyncratic gene order discovered in C. destructor mtDNA may be secondarily acquired from the ancestral lineage of the Astacidea. PMID:21740340
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.
Jung Nyun Kim; Jung Hwa Choi; Jeong-Hoon Lee; Joo Il Kim
Based on samples collected from the Korean Exclusive Economic Zone (EEZ) during an investigation of fishery resources by the National Fisheries Research and Development Institute (NFRDI) from 2002 to 2010, alongside some supplemental material, six species of the genus Plesionika are identified: P. izumiae Omori, 1971, P. ortmanni Doflein, 1902, P. grandis Doflein, 1902, P. lophotes Chace, 1985, P. narval (Fabricius, 1787), and P. orientalis Chace, 1985. Of these, the last four species are new...
Marina de Sá Leitão C. de Araújo
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.
Garm, A; Hallberg, E; Høeg, J T
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...
Parker, A. R.; McKenzie, D. R.; Ahyong, S.T.
The first demonstration, to our knowledge, of an evolutionary shift in communication mode in animals is presented. Some species of Ovalipes display spectacular iridescence resulting from multilayer reflectors in the cuticle. This reflector is unique in animals because each layer is corrugated and slightly out of phase with adjacent layers. Solid layers are separated from fluid layers in the reflector by side branches acting as support struts. An effect of this reflector is that blue light is ...
Garm, Anders Lydik; Shabani, Shkelzen; Høeg, Jens Thorvald; Derby, Charles D.
most potent single compounds being ammonium, adenosine-5'-monophosphate, taurine, glutamate, and aspartate. Cluster analysis indicated that the neurons constitute a heterogeneous population that could be placed into seven groups linked according to their most excitatory compound. These neurons 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 of...... chemosensory neurons in other crustacean appendages shows that neurons in the mouthparts have relatively broad tuning biased toward detecting and resolving high concentrations. Based on these comparisons, we suggest a functional distinction among the chemosensors on the different appendages: long distance...
Morphological and functional state of hepatopancreas were analyzed in Palaemonetes argentinus from two environments with different pesticide concentrations. Los Padres lagoon (Argentina) is an area subjected to contamination due to the slow exchange of water, the shallow depth and the input of contaminated water. Prawns living in this lagoon accumulate high amounts of organochlorine pesticides in their tissues. Hepatopancreas of prawns from Canal 5, an adjacent shallow stream where the amount of pesticides is below toxic levels, and from Los Padres lagoon were processed by standard histological techniques with light microscopy and transmission electronic microscopy. At Los Padres lagoon, there were found important tissular alterations, such as intertubular infiltration of haemocytes and connective tissue, epithelial retraction in some tubules, and a folded basal lamina. Important necrotic desquamation, with cariolysis, cariorrexis and lack of cellular details were also observed. Numerous tubules presented an enlarged and irregular lumen with the epithelium atrophied or completely absent. In general, the lesions were particularly located in the medullar region of the organ. At the ultrastructural level, R and F cells were the most damaged. Both cell types had nuclear retraction, chromatin condensation and cytoplasmic lysis. Some R cells also had dilated mitochondria and numerous lysosomes, and the basal cytoplasm was nearly completely lysed. The hepatopancreas of prawns from Canal 5 did not evidence any alterations. The histopathological study of the hepatopancreas is a highly sensitive tool to evaluate the physiological condition of prawns and water quality. Other environmental conditions were similar, so it can be assumed that pollutants were the main cause of organ deterioration. (author)
Cuesta Mariscal, Jose A.
Para poder realizar estudios del plancton marino es necesario una correcta identificación de las especies que lo componen. Las fases larvarias de los decápodos suponen un porcentaje muy importante de la composición del plancton. La gran diferencia entre la morfología ... de las fases larvarias y el adulto es enorme, por lo tanto no se pueden deducir a que especie pertenecen las larvas por simple similitud. Para ello es necesario el estudio del desarrollo larvario en laboratorio partiendo de u...
Gan, Huan You; Gan, Han Ming; Lee, Yin Peng; Austin, Christopher M
The mitochondrial genome of the rock pool prawn (Palaemon serenus), is sequenced, making it the third for genera of the family Palaemonidae and the first for the genus Palaemon. The mitogenome is 15,967 base pairs in length and comprises 13 protein-coding genes, 2 ribosomal subunit genes, 22 transfer RNAs and a non-coding AT-rich region. The P. serenus mitogenome has an AT bias of 58.97% and a base composition of 29.79% for T, 24.14% for C, 29.18% for A, and 16.89% for G. The mitogenome gene order of P. serenus is identical to Exopalaemon carinicauda. PMID:25693708
Vereshchaka, Alexander L.; Olesen, Jørgen; Lunina, Anastasia A.
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...
Cumillaf, Juan P; Blanc, Johnny; Paschke, Kurt; Gebauer, Paulina; Díaz, Fernando; Re, Denisse; Chimal, María E; Vásquez, Jorge; Rosas, Carlos
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
Tudge, Christopher C.
A phylogenetic analysis of selected anomuran, thalassinidean, and other decapod crustacean taxa, based on spermatozoal ultrastructural characters and spermatophore morphological characters, was performed and the following relationships of the taxa are elucidated from the trees produced. The Anomura are not a monophyletic assemblage, with the lomoid Lomis being exclusive of the remainder of the anomuran taxa, and the thalassinid Thalassina included in the anomuran clade. The synapomorphy joini...
The palinurid genus Linuparus White, 1847, has been represented by a single recent species, Linuparus trigonus (Von Siebold). The trawl survey of the northern shelf region of the South China Sea at present being carried out by the R.V. "Cape St. Mary" of the Fisheries Research Station, Hong Kong, ha
Jung Nyun Kim
Full Text Available Based on samples collected from the Korean Exclusive Economic Zone (EEZ during an investigation of fishery resources by the National Fisheries Research and Development Institute (NFRDI from 2002 to 2010, alongside some supplemental material, six species of the genus Plesionika are identified: P. izumiae Omori, 1971, P. ortmanni Doflein, 1902, P. grandis Doflein, 1902, P. lophotes Chace, 1985, P. narval (Fabricius, 1787, and P. orientalis Chace, 1985. Of these, the last four species are new to Korean marine fauna. The distributional range of P. narval extends to the East China Sea off Jeju Island. Excluding P. izumiae and P. ortmanni, the other four species are relatively rare in the seas around Korea. They are described and illustrated with color photographs. A key to the Korean species of Plesionika is also presented.
Lee, Kyu Hyun
Full Text Available Specimens of Austinogebia wuhsienweni (Yu, 1931 previously recorded from China to Japan were collected at a manila clam farm of 0.5 m depth in Hongseong, Yellow Sea. They were briefly described and illustrations included color photographs, since this was the first record of this rare species from Korean waters. Three species of Upogebiidae are known from Korean waters: Upogebia major (De Haan, 1839, U. issaeffi (Balss, 1913, and A. wuhsienweni (Yu, 1931. They are similar to each other, however, the presence of the ventral spines of the rostrum, a proximal knob on the lateral margin of the uropodal endopod, and a longitudinal carina on the inner surface of the palm of the male first pereiopod can easily distinguish the present species from the two species of Upogebia.
Species of the genus Pontonia Latreille, 1829, are distributed in tropical and subtropical waters around the world, living in association with either molluscan or ascidian hosts. In the present taxonomic revision, Pontonia sensu lato is divided into six genera: Pontonia sensu stricto; Ascidonia gen. nov., Rostronia gen. nov., Dactylonia gen. nov., Odontonia gen. nov., and Bruceonia gen. nov. A total of 29 species is described and figured, four of which are new to science: Pontonia pilosa spec...
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.
Fernando L. Mantelatto
Full Text Available The aim of the present study was to characterize the composition of Majoidea crabs inhabiting the infralittoral rocky/sandy bottom of Anchieta Island (Ubatuba, from north coast of São Paulo State. Crabs were collected monthly during 1999 and 2000 by using SCUBA and cages. The occurrence of eight species of majoids (Epialtus brasiliensis, Mithraculus forceps, Mithrax braziliensis, Mithrax hispidus, Mithrax tortugae, Pelia rotunda, Pitho lherminieri and Stenorhynchus seticornis was registered and corresponded to 24.2% of total of majid crabs recorded in the coast of São Paulo State. Mithraculus forceps, Mithrax tortugae and Stenorhynchus seticornis were most abundant in samples and constituted populations that belonged to the brachyuran community of the studied area. The taxocoenosis of the area was dominated by M. forceps (57.62%. The occurrence of Mithrax braziliensis in the present study enlarged its south distribution to the São Paulo State.O objetivo do presente estudo foi caracterizar a composição dos caranguejos Majoidea habitantes do infralitoral rochoso/arenoso da Ilha Anchieta (Ubatuba, litoral norte do Estado de São Paulo. Os caranguejos foram coletados mensalmente durante 1999 e 2000, por mergulho autônomo e armadilhas. Foi registrada a ocorrência de oito espécies de caranguejos majóideos (Epialtus brasiliensis, Mithraculus forceps, Mithrax braziliensis, Mithrax hispidus, Mithrax tortugae, Pelia rotunda, Pitho lherminieri e Stenorhynchus seticornis o que corresponde a 24,2% do total de majóideos registrados para o litoral do Estado de São Paulo. Mithraculus forceps, Mithrax tortugae e Stenorhynchus seticornis constituem populações frequentes na comunidade da área de estudo. A taxoeconose da área foi dominada por M. foreceps (57,62%. A ocorrência de Mithrax braziliensis no presente estudo amplia sua distribuição sul para o Estado de São Paulo.
Luz Amelia Vega-Pérez; Koichi Ara; Tsui Hua Liang; Marcelo Mattos Pedreira
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. faxo...
Lasley, R.M., Jr.
Full Text Available new species of xanthid crab, Zozymodes sculptus sp. nov.,from Guam is described and illustrated. Zozymodes sculptus is distinguished from its congeners Z. cavipes (Dana, 1852a, Z. nodosus Klunzinger, 1913, Z. pumilus (Hombron & Jacquinot, 1846, Z. xanthoides (Krauss, 1843, and Z. demani Odhner, 1925, by its unusual raised crests of the carapace, two anterior-pointing anterolateral teeth, deep furrow formed by parallel crests on the superior margin of the chelae, and proportionately more narrow carapace.
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
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) establishing Cinetorhynchus, a new subgenus of Rhynchocinetes, (5) giving new locality and host records for Hippolyte commensalis, (6) establishing that dacqueti is the correct name for the western subs...
Vela, María José; González-Gordillo, Juan Ignacio
For most of the family Porcellanidae, which comprises 283 species, larval development remains to be described. Full development has been only described for 52 species, while part of the larval cycle has been described for 45 species. The importance of knowing the complete larval development of a species goes beyond allowing the identification of larval specimens collected in the plankton. Morphological larval data also constitute a support to cladistic techniques used in the establishment of the phylogenetic status (see Hiller et al. 2006, Marco-Herrero et al. 2013). Nevertheless, the literature on the larval development of this family is old and widely dispersed and in many cases it is difficult to collect the available information on a particular taxon. Towards the aim of facilitating future research, all information available on the larval development of porcellanids has been compiled. Following the taxonomic checklist of Porcellanidae proposed by Osawa and McLaughlin (2010), a checklist has been prepared that reflects the current knowledge about larval development of the group including larval stages and the method used to obtain the larvae, together with references. Those species for which the recognised names have been changed according to Osawa and McLaughlin (2010) are indicated. PMID:27081332
HORKÁ I.; De Grave, S; Fransen, C.H.J.M.; Petrusek, A; Duris, Z.
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 phy...
Full Text Available El presente trabajo analiza información de las mudas y observaciones del comportamiento reproductivo de G. grapsus, relacionando las frecuencias de mutilaciones y el comportamiento caní- bal observado en las cópulas. Las colectas de mudas y observaciones sobre las cópulas se llevaron a cabo entre diciembre de 1990 y diciembre de 2001, en 200 m de una orilla rocosa al sur de la Bahía de Ancón, Lima, Perú. G. grapsus vive en grupos de número variable y asociados a grietas donde los individuos buscan refugio. El comportamiento de cortejo observado fue el de "búsqueda-intercepción" he incluyó diferencias como la defensa de territorios no temporales, largas persecusiones e intercepción por varios machos. Un total de 312 cópulas fueron observadas siendo más frecuentes durante el verano. Un total de once intentos de cópula produjeron la muerte de los individuos, siete fueron machos. En todo el periodo de estudio se colectaron un total de 8421 mudas de las cuales 418 presentaban mutilaciones o heridas en el cefalotórax o abdomen. No se observan diferencias significativas entre las tallas de mutilados de ambos sexos. El 73% de las mudas mutiladas presentan una sola mutilación, el 20% presentan dos mutilaciones y el 6% tres; se encontraron mudas hasta con siete apéndices mutilados. Las frecuencias de mutilaciones son significativamente mayores en machos. Las mutilaciones de las quelas y la segunda pata caminadora son más frecuentes en machos, mientras que en las hembras las mutilaciones de la cuarta y tercera pata caminadora son más frecuentes. Se propone que las mutilaciones se producen durante los intentos de cópula, principalmente por diferencias entre el tamaño de los individuos.
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
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). PMID:25807292
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.
De Grave, S; Fransen, C.H.J.M.
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 provided.
Lee, Yin Peng; Gan, Han Ming; Tan, Mun Hua; Lys, Isabelle; Page, Rachel; Dias Wanigasekera, Beatrice; Austin, Christopher M
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. PMID:25707411
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.
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.
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.
Cumillaf, Juan P.; Blanc, Johnny; Paschke, Kurt; Gebauer, Paulina; Díaz, Fernando; Re, Denisse; Chimal, María E.; Vásquez, Jorge; Rosas, Carlos
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
S. Khanum; Tirmizi, N.M.
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.
Juan P. Cumillaf
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.
Full Text Available Ucides cordatus (Linnaeus, 1763 is a hypo-hyper-regulating mangrove crab possessing gills for respiratory and osmoregulatory processes, separated in anterior and posterior sections. They also have hepatopancreas, which is responsible for digestion and absorption of nutrients and detoxification of toxic metals. Each of these organs has specific cells that are important for in vitro studies in cell biology, ion and toxic metals transport. In order to study and characterize cells from gills and hepatopancreas, both were separated using a Sucrose Gradient (SG from 10 to 40% and cells in each gradient were characterized using the vital mitochondrial dye DASPEI (2-(4-dimethylaminostyryl-N- ethylpyridinium iodide and Trichrome Mallory's stain. Both in 20 and 40% SG for gill cells and 30% SG for hepatopancreatic cells, a greater number of cells were colored with DASPEI, indicating a larger number of mitochondria in these cells. It is concluded that the gill cells present in 20% and 40% SG are Thin cells, responsible for respiratory processes and Ionocytes responsible for ion transport, respectively. For hepatopancreatic cells, the 30% SG is composed of Fibrillar cells that possess larger number of membrane ion and nutrient transporters. Moreover, the transport of toxic metal cadmium (Cd by isolated hepatopancreatic cells was performed as a way of following cell physiological integrity after cell separation and to study differences in transport among the cells. All hepatopancreatic cells were able to transport Cd. These findings are the first step for further work on isolated cells of these important exchange epithelia of crabs, using a simple separation method and to further develop successful in vitro cell culture in crabs.
Van Der Meij, Sancia E T
A new species of cryptochirid crab, Fizesereneia panda van der Meij, is described and illustrated based on specimens collected from the scleractinian corals Lobophyllia cf. hemprichii and L. cf. corymbosa from the Farasan Banks, Farasan Islands, and the reefs off Thuwal in the Saudi Arabian Red Sea, and from Symphyllia recta from reefs in the Gulf of Oman. This is the second cryptochirid species with the Red Sea as type locality. It can be separated from its congeners by the subrectangular carapace, raised midline and the complete division of the carapace depressions, and reddish black colour pattern of these concavities in live specimens. This new species is the seventh assigned to Fizesereneia. A DNA barcode for the new species has been deposited in GenBank. Copyright © 2015 Magnolia Press.
José J. P. R. Lira
Full Text Available The condition factor is a parameter which acts as a general indicator of the "well-being" of a species, and it can be obtained through the analysis of width vs. weight relationships. The present work aims to investigate size vs. weight relationship and the condition factor of the crab Goniopsis cruentata (Latreille, 1803. The study area was the Mundaú/Manguaba estuarine complex, Maceió, state of Alagoas, Northeast Brazil. Samplings were monthly accomplished from August 2007 to July 2008. A total of 626 individuals were analyzed, being 309 males and 317 females. Males were larger and heavier than females, what is expected in many brachyuran. The growth was positive allometric to both males (b = 3.42 and females (b = 3.30, not obeying the "cube law". The condition factor of female was higher than that of male crabs, probably due to the gonad weight of females. It also varied seasonally for both sexes, being higher in the autumn and winter in males, and in the autumn and spring in females, and related to the molt and period of spawning intensification.
José J. P. R. Lira; Tereza C. S. Calado; Marina S.L.C. Araújo
The condition factor is a parameter which acts as a general indicator of the "well-being" of a species, and it can be obtained through the analysis of width vs. weight relationships. The present work aims to investigate size vs. weight relationship and the condition factor of the crab Goniopsis cruentata (Latreille, 1803). The study area was the Mundaú/Manguaba estuarine complex, Maceió, state of Alagoas, Northeast Brazil. Samplings were monthly accomplished from August 2007 to July 2008. A t...
Marcelo Antonio Amaro Pinheiro
Full Text Available A total of 2,130 individuals of Ucides cordatus (1,255 males and 875 females were captured in a mangrove forest at Iguape, São Paulo, Brazil. For each crab, the following body structures were measured: carapace (width = CW; length = CL; depth = CD, 5th abdominal somite (AW, major chelar propodus (length = PL; width = PW; depth = PD, and 1st and 2nd gonopod pairs (length = GL1 and GL2. The Student "t" and Snedecor "F" tests were used to verify any changes in growth allometric rates during ontogeny. The relationships CLxCW, PLxCW (for both sexes, GL1xCW and GL2xCW (males and AWxCW (females, showed a better fit by two equations for the juvenile and adult phases (p 59 mm. Females showed a similar size interval: (juvenile CW 58 mm.Um total de 2,130 indivíduos de U. cordatus (1,255 machos e 875 fêmeas foi coletado em Iguape (SP, Brasil. Cada exemplar foi submetido à biometria das seguintes estruturas: cefalotórax (largura = CW; comprimento = CL; altura = CD, quinto somito abdominal (AW, própodo quelar (comprimento = PL; espessura = PW; altura = PD, e 1º e 2º par de gonopódios (comprimento = GL1 e GL2. O teste "t" Student e "F" de Snedecor foram utilizados para identificar diferenças no grau de alometria e alterações ontogenéticas na taxa de crescimento, respectivamente. As relações CLxCW, PLxCW (ambos os sexos, GL1xCW e GL2xCW (machos e AWxCW (fêmeas, apresentaram ajuste por duas equações representando a fase jovem e adulta (p59mm, com tamanho similar ao dos morfotipos das fêmeas (jovens CW58mm.
On 30 November 1941 a sunfish Mola mola (L.) was found on the beach near Schoorl (Province of Noord-Holland). The fish was parasitized by a specimen of Pennella filosa (L.) (Crustacea, Copepoda) on which a specimen of Conchoderma virgatum (Crustacea: Cirripedia) had attached itself. This is the firs
Tourtip, Somjintana; Wongtripop, Somjai; Stentiford, Grant D; Bateman, Kelly S; Sriurairatana, Siriporn; Chavadej, Jittipan; Sritunyalucksana, Kallaya; Withyachumnarnkul, Boonsirm
A new microsporidian species, Enterocytozoon hepatopenaei sp. nov., is described from the hepatopancreas of the black tiger shrimp Penaeus monodon (Crustacea: Decapoda). Different stages of the parasite are described, from early sporogonal plasmodia to mature spores in the cytoplasm of host-cells. The multinucleate sporogonal plasmodia existed in direct contact with the host-cell cytoplasm and contained numerous small blebs at the surface. Binary fission of the plasmodial nuclei occurred during early plasmodial development and numerous pre-sporoblasts were formed within the plasmodium. Electron-dense disks and precursors of the polar tubule developed in the cytoplasm of the plasmodium prior to budding of early sporoblasts from the plasmodial surface. Mature spores were oval, measuring 0.7x1.1microm and contained a single nucleus, 5-6 coils of the polar filament, a posterior vacuole, an anchoring disk attached to the polar filament, and a thick electron-dense wall. The wall was composed of a plasmalemma, an electron-lucent endospore (10nm) and an electron-dense exospore (2nm). DNA primers designed from microsporidian SSU rRNA were used to amplify an 848bp product from the parasite genome (GenBank FJ496356). The sequenced product had 84% identity to the matching region of SSU rRNA from Enterocytozoon bieneusi. Based upon ultrastructural features unique to the family Enterocytozoonidae, cytoplasmic location of the plasmodia and SSU rRNA sequence identity 16% different from E. bieneusi, the parasite was considered to be a new species, E. hepatopenaei, within the genus Enterocytozoon. PMID:19527727
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
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
Komai, Tomoyuki; Tsuchida, Shinji
Samples and images of deep-water benthic decapod crustaceans were collected from the Nikko Seamounts, Mariana Arc, at depths of 520-680 m, by using the remotely operate vehicle "Hyper-Dolphin", equipped with a high definition camera, digital camera, manipulators and slurp gun (suction sampler). The following seven species were collected, of which three are new to science: Plesionika unicolor n. sp. (Caridea: Pandalidae), Homeryon armarium Galil, 2000 (Polychelida: Polychelidae), Eumunida nikko n. sp. (Anomura: Eumunididae), Michelopagurus limatulus (Henderson, 1888) (Anomura: Paguridae), Galilia petricola n. sp. (Brachyura: Leucosiidae), Cyrtomaia micronesica Richer de Forges & Ng, 2007 (Brachyura: Inachidae), and Progeryon mus Ng & Guinot, 1999 (Brachyura: Progeryonidae). Affinities of these three new species are discussed. All but H. armarium are recorded from the Japanese Exclusive Economic Zone for the first time. Brief notes on ecology and/or behavior are given for each species. PMID:24870636
Full Text Available In the present study the life history of blonde ray Raja brachyura from Sardinian waters (central-western Mediterranean was investigated and the results compared with previously published data on this species. The age, growth and reproduction were studied using 1792 specimens caught between 2005 and 2013. Females ranged from 13.1 to 105.5 cm in Total length (TL and males from 18 to 96.5 cm TL. This species was sexually dimorphic, with TL females attaining a larger size than males. Both females and males showed allometric growth (b>3 and we found significant differences in the relationship between length and weight among sexes. The von Bertalanffy growth function (3 parameters, which provided the following values: L∞ = 111.14 cm TL, k = 0.10 and t0 = -1.3 for females, and L∞ = 108.81 cm TL, k = 0.11 and t0 = -1.2 for males, was the best-fit age model. R. brachyura showed a relatively slow growth rate with males slightly more rapid than females. Length and age at maturity were 87.2 cm and 14 years for females and 80.8 cm and 10 years for males. This ray exhibited a restricted reproductive cycle from late May to August, confirmed by the seasonal evolution of GSI values. Ovarian fecundity reached a maximum of 44 yolked follicles. Given the relative abundance in the Sardinian seas, it is hoped that the results can be useful in the implementation of basic management measures in order to ensure the sustainability of catches of this species in the Mediterranean Sea.
Krieger, Jakob; Braun, Philipp; Rivera, Nicole T; Schubart, Christoph D; Müller, Carsten H G; Harzsch, Steffen
Adaptations to a terrestrial lifestyle occurred convergently multiple times during the evolution of the arthropods. This holds also true for the "true crabs" (Brachyura), a taxon that includes several lineages that invaded land independently. During an evolutionary transition from sea to land, animals have to develop a variety of physiological and anatomical adaptations to a terrestrial life style related to respiration, reproduction, development, circulation, ion and water balance. In addition, sensory systems that function in air instead of in water are essential for an animal's life on land. Besides vision and mechanosensory systems, on land, the chemical senses have to be modified substantially in comparison to their function in water. Among arthropods, insects are the most successful ones to evolve aerial olfaction. Various aspects of terrestrial adaptation have also been analyzed in those crustacean lineages that evolved terrestrial representatives including the taxa Anomala, Brachyura, Amphipoda, and Isopoda. We are interested in how the chemical senses of terrestrial crustaceans are modified to function in air. Therefore, in this study, we analyzed the brains and more specifically the structure of the olfactory system of representatives of brachyuran crabs that display different degrees of terrestriality, from exclusively marine to mainly terrestrial. The methods we used included immunohistochemistry, detection of autofluorescence- and confocal microscopy, as well as three-dimensional reconstruction and morphometry. Our comparative approach shows that both the peripheral and central olfactory pathways are reduced in terrestrial members in comparison to their marine relatives, suggesting a limited function of their olfactory system on land. We conclude that for arthropod lineages that invaded land, evolving aerial olfaction is no trivial task. PMID:26713228
Samara de Paiva Barros
Full Text Available The main goal of this study was the identification of the items of the diet of the L. spinosa, based on the stomach contents analysis. The crabs were obtained from Ubatuba region north-eastern shore of São Paulo State. In the laboratory, all the individuals were dissected, the stomach was retreated and fixed in 10% formaline. The alimentary items were identified under stereomicroscope and analysed by the method of Frequency of Occurrence. A total of 194 stomachs was analysed and nine alimentary items were obtained. Unindentified material was found in 98% of analysed stomach and poriferan were present in less then 1% of stomachs. These results pointed a diversified diet explored by this crab, as well as the employment of some different methods for food intake. This suggested that these crabs could occupy different position in the trophic chain.O objetivo deste trabalho é identificar os itens alimentares que compõem a dieta de L. spinosa, por meio da análise do conteúdo estomacal. Os caranguejos foram coletados no litoral norte paulista (23º25’S-45º00’W. No laboratório, todos indivíduos foram dissecados, os estômagos foram retirados e fixados em formol 10%. Os itens alimentares foram identificados sob estereomicroscópio, sendo que para a análise foi utilizado o método Freqüência de Ocorrência. Foram analisados 194 estômagos, nos quais foram encontrados nove itens alimentares. A maior freqüência foi para material não identificado, ocorrendo em 98% dos estômagos analisados e Porifera foi o item com a menor freqüência, ocorrendo em menos de 1% dos estômagos. Com base nos resultados obtidos, sugere-se que o caranguejo L. spinosa apresenta uma dieta diversificada, sugerindo a utilização de diferentes métodos para a obtenção de alimento e por conseqüência podendo ocupar vários níveis na cadeia trófica.
XUE Junzeng; LIU Yan; Neil CUMBERLIDGE; WU Huixian
This study expands on recent reports that direct development in the Chinese potamid freshwater crab Sinopotamon yangtsekiense involves the completion of all brachyuran larval stages (nauplius,zoea,and megalopa) inside the egg case during embryonic development.Detailed studies of embryonic development in this species revealed the presence of an additional larval stage (the egg-juvenile) between the megalopa and the free-living hatchling crab.We described and compared the appendages of the head,thorax,and abdomen of the egg-juvenile with those of the hatchling crab in S.yangtsekiense.Significant differences were found between most of the appendages of these two stages with a soft exoskeleton in the egg-juvenile,no joint articulation,a slimmer appearance,and a lack of setae when compared with the newly emerged free-living hatchling crab.These modifications of the appendages are related to the confinement within the egg case of the egg-megalopa and egg-juvenile during direct development,and the need for the free-living hatchling freshwater crab to move,feed,and respire.In marine crabs,the megalopa gives rise to the first crab stage whereas in freshwater crabs the egg-juvenile follows the megalopa and immediately precedes the free-living first crab stage.
Timoteo T. Watanabe
Full Text Available Trawl fisheries are associated with catches of swimming crabs, which are an important economic resource for commercial as well for small-scale fisheries. This study evaluated the population biology and distribution of the swimming crab Callinectes ornatus (Ordway, 1863 in the Estuary-Bay of São Vicente, state of São Paulo, Brazil. Crabs were collected from a shrimp fishing boat equipped with a semi-balloon otter-trawl net, on eight transects (four in the estuary and four in the bay from March 2007 through February 2008. Specimens caught were identified, sexed and measured. Samples of bottom water were collected and the temperature and salinity measured. A total of 618 crabs were captured (332 males, 267 females and 19 ovigerous females, with a sex ratio close to 1:1. A large number of juveniles were captured (77.67%. Crab spatial distributions were positively correlated with salinity (Rs = 0.73, p = 0.0395 and temperature (Rs = 0.71, p = 0.0092. Two peaks of recruitment occurred, in summer and autumn, and ovigerous females were mostly captured during summer, showing a seasonal reproductive pattern. The results showed that C. ornatus uses the bay as a nursery area for juvenile development. Callinectes ornatus is not yet a legally protected species, and the minimum allowed size of crabs caught in the area, although already restricted, should be carefully evaluated since the removal of large numbers of juveniles could negatively impact the local population.
Toxicidad del cobre en larvas nauplii del camarón comercial Artemesia longinaris Bate (Crustacea, Decapoda, Penaeidae) Copper toxicity in nauplii larvae of the commercial shrimp Artemesia longinaris (Crustacea, Decapoda, Penaeidae)
Marcelo A. Scelzo
Se evaluó la toxicidad del cobre, empleando sulfato de cobre en larvas nauplii sin alimentar del camarón comercial Artemesia longinaris mediante bioensayos de 72 horas de duración, con el objeto de determinar la dosis efectiva media o concentración letal (LC50) y grado de desarrollo (estadio larval). Se prepararon concentraciones de cobre equivalentes a 1000, 500, 250 y 125 partes por billón (ppb) en agua de mar (salinidad de 34 %). Un total de 90 larvas nauplii por tratamiento (tres réplicas...
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
Karina A. Keunecke
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.
Aspectos anatômicos e funcionais do aparelho reprodutor de Parastacus brasiliensis (von Martens (Crustacea, Decapoda, Parastacidae Anatomical and functional aspects of the reproductive system of Parastacus brasiliensis (von Martens (Crustacea, Decapoda, Parastacidae
Alexandre Oliveira de Almeida
Full Text Available The absence of morphological external characteristics that allow the recognition of the sex as well as the presence of both male and female gonopores in the same animal [except in some sexual forms of Parastacus nicoleti (Philippi, 1882] gives rise to the hypothetical existence of some form of hermaphroditism in crayfishes belonging to the genus Parastacus Huxley, 1879. Specimens of Parastacus brasiliensis (von Martens, 1869 were collected in a rivulet at Mariana Pimentel municipality, Rio Grande do Sul, Brazil. In the laboratory they were reared and dissected. The results suggest that P. brasiliensis may be a sequential hermaphroditic species, but male and female gonadal tissues were not simultaneously present in the analized samples. In testes and ovaries two pairs of genital ducts are present; that connect, respectively, to the gonopores on the coxae of the fifth and the third pairs of pereiopods. In the females only the apertures and anterior ducts seem to be functional, while in the males only the apertures and posterior ducts may be functional. The existence of different degrees of obstruction in the female genital apertures and different degrees of projection in the male genital apertures was observed. The aspect of the gonopores were used to recognize, externally, the sex of animais.
Alometria no crescimento de Uca mordax (Smith (Crustacea, Decapoda, Ocypodidae na Baía de Guaratuba, Paraná, Brasil Allometric growth in the fiddler crab Uca mordax (Smith (Crustacea, Decapoda, Ocypodidae from Guaratuba Bay, Parana, Brazil
Full Text Available Um estudo do crescimento relativo da maior quela do macho e do abdome da fêmea foi realizado numa população do caranguejo chama-maré Uca mordax (Smith, 1870 ocorrente no extremo oeste da Baía de Guaratuba, Paraná, sul do Brasil. O comprimento da maior quela (CMQ foi medido em 319 machos, e a largura do abdome (LAB em 356 fêmeas. Adicionalmente, seis chama-marés sexualmente indiferenciados foram analisados. A largura da carapaça (LC foi escolhida como dimensão de referência para ambos os sexos, a qual variou de 1,94 a 20,0 mm para machos, de 2,50 a 18,85 mm para fêmeas, e de 1,94 a 3,15 para os indivíduos sexualmente indiferenciados. A relação entre o LC e CMQ mostrou um ponto de inflexão em 11,70 mm LC nos machos, e entre LC e LAB, em 8,77 mm LC dentre as fêmeas. Os machos (média LC = 14,24 mm atingiram tamanhos pouco maiores do que as fêmeas (média LC = 13,97 mm. O crescimento foi alométrico positivo durante toda a ontogênese de ambos os sexos, isto é, antes e depois da muda puberal. As equações das relações entre LC e CMQ nos machos foram: logCMQ = -0,542265 + 1,51.logLC para machos juvenis e logCMQ = -1,446281 + 2,37.logLC para machos adultos. Nas fêmeas, a relação entre LC e LAB foi: logLAB = -0,607282 + 1,22.logLC e logLAB = -0,912074 + 1,60.logLC, respectivamente, para juvenis e adultas. Estas dimensões estão relacionadas com as atividades reprodutivas da espécie. O nível de alometria do CMQ dos machos adultos de U. mordax foi o mais alto dentre as espécies do gênero, cujo crescimento relativo desta dimensão foi estudado. A proporção de machos destros foi estatisticamente a mesma daqueles sinistros (1:1.Relative growth of the male major chela and female abdomen was studied in a population of the fiddler crab Uca mordax (Smith, 1870 from Guaratuba Bay, Parana, Southern Brazil. Major chela length (CMQ was measured from 319 males, and abdomen width (LAB from 356 females. Also six small sexually undifferentiated crabs were measured. Carapace width (LC was the reference dimension for both sexes, which ranged from 1.94 to 20.0 mm for males, from 2.50 to 18.85 mm for females, and from 1.94 to 3.15 mm for sexually undifferentiated crabs. Relationship between LC and CMQ showed a transition point at 11.70 mm LC in males, and between LC and LAB, at 8.77 mm LC in females. Males (mean LC = 14.24 mm showed a slightly greater size than females (mean LC = 13,97 mm. These dimensions had positive allometrical growth during all life for both sexes: before and after the puberal molting. Regressions between LC and CMQ in males read as: logCMQ = -0,542265 + 1,51.logLC for male juveniles and logCMQ = -1,446281 + 2,37.logLC for male adults. In females, the regressions between LC and LAB were: logLAB = -0,607282 + 1,22.logLC for juveniles and logLAB = -0,912074 + 1,60.logLC for adults. These body dimensions are related to reproductive activities of this species. The level of allometry in CMQ of adult males was the highest among Uca species which relative growth of this dimension is known. The handedness had a proportion of 1:1 between right-handed and left-handed males.
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
Patrícia M.C. Moraes-Riodades
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
Espécies do gênero Munida Leach (Crustacea, Decapoda, Galatheidae, distribuídas na costa do Brasil Species of the genus Munida Leach (Crustacea, Decapoda, Galatheidae with distribution in the Brazilian coast
Gustavo A.S. de Melo-Filho
Full Text Available The purpose of this work is to analyse the taxonomy and distributional patterns of the species of the genus Munida Leach, 1820 which occur along the Brazilian coast. The species of Munida present some peculiar characteristics, rarely found in any other marine group. They live in groups with great number of individuals (gregariousness and with several species found together in the same population (sintopy. In addition, they exhibit a great degree of intraspeciftc variation and, paradoxally, a little variability among the species. These factors make a better understanding of the systematics of this group very difficult. In the present study the utilization of non variable characters was emphasized. As a corollary of this study, "species-complexes" were defined including groups of species morphologically very similar but yet well characterized. Sixteen species with distribution along the Brazilian coast were studied. An identification key is provided. A general discussion where the main problems on taxonomy and distributional patterns of species were analysed was done.
Espécies do gênero Munida Leach (Crustacea, Decapoda, Galatheidae), distribuídas na costa do Brasil Species of the genus Munida Leach (Crustacea, Decapoda, Galatheidae) with distribution in the Brazilian coast
Gustavo A.S. de Melo-Filho; Gustavo A.S. de Melo
The purpose of this work is to analyse the taxonomy and distributional patterns of the species of the genus Munida Leach, 1820 which occur along the Brazilian coast. The species of Munida present some peculiar characteristics, rarely found in any other marine group. They live in groups with great number of individuals (gregariousness) and with several species found together in the same population (sintopy). In addition, they exhibit a great degree of intraspeciftc variation and, paradoxally, ...
Monosacáridos terminales presentes en las cubiertas ovocitarias del camarón de roca Rhynchocinetes typus (Crustacea, Decapoda Terminal monosaccharid on the oocyte envelope of the shrimp rock Rhynchocinetes typus (Crustacea, Decapoda
Full Text Available Durante la primera interacción gamética, los oligosacáridos de las glicoproteínas presentes en las cubiertas ovocitarias son importantes en el reconocimiento del espermatozoide. Estos oligosacáridos presentan monosacáridos terminales que pueden ser reconocidos mediante lectinas específicas. En otras especies marinas no sólo se ha determinado la presencia de monosacáridos en las cubiertas ovocitarias sino que su número y ubicación varía durante la maduración del ovocito. El presente estudio determina la presencia de monosacáridos en las cubiertas ovocitarias y su ubicación durante la maduración del ovocito en el camarón de roca, mediante el uso de las siguientes lectinas específicas conjugadas con FITC: LCA, BS-1, LTA y Con-A, las cuales reconocen los monosacáridos manosa, galactosa, fucosa y glucosa respectivamente. Los resultados mostraron que manosa está presente en cantidades 2-3 veces mayores que los otros azúcares y que manosa, galactosa y glucosa se incrementan desde los 5 días premuda hasta los 2 días postmuda sin ser estadísticamente significativas. La fucosa presentó la menor concentración. Estos resultados sugieren que estos azúcares podrían participar en la primera interacción gamética, sin embargo, la participación en la fecundación debe ser determinada a través de ensayos de inhibición de la fecundación in vitro con espermatozoides previamente tratados con estos azúcares a fin de bloquear los sitios que interactúan con las cubiertas de los ovocitosOligosaccharids of glycoproteins present in oocytes envelope during the first gamete interaction have an important role in the sperm recognizing process. The terminal monosaccharid of oligosaccharids can be recognized by specific lectins. The number and location of monosaccharid on the oocyte coat changes in many marine species according to the oocyte maturation. This study determines the presence of monosaccharids on the oocyte envelope and its location during the oocyte maturation by the following specific FITC-labeled lectins: LCA, BS-1, LTA and Con-A which recognize the mannose, galactose, fucose and glucose monosaccharid respectively. The results of the lectins experiments showed a high concentration of mannose (2-3 time on the mature oocyte coat. From 5 days pre-molt to 2 day post-molt he concentration of mannose, galactose and glucose increasing on the oocyte envelope increaded. The fucose monosacharide was 3 time less than mannose. This results suggest that mannose could be participating in the first gametic interaction., however the involvement of these carbohydrates during the fertilization must be determined by in vitro fertilization inhibition experiments
suggest that B. latro has visual and mechanosensory skills that are comparable to those of marine Crustacea. Conclusions In parallel to previous behavioral findings that B. latro has aerial olfaction, our results indicate that their central olfactory pathway is indeed most prominent. Similar findings from the closely related terrestrial hermit crab Coenobita clypeatus suggest that in Coenobitidae, olfaction is a major sensory modality processed by the brain, and that for these animals, exploring the olfactory landscape is vital for survival in their terrestrial habitat. Future studies on terrestrial members of other crustacean taxa such as Isopoda, Amphipoda, Astacida, and Brachyura will shed light on how frequently the establishment of an aerial sense of olfaction evolved in Crustacea during the transition from sea to land. Amounting to ca. 1,000,000, the numbers of interneurons that analyse the olfactory input in B. latro brains surpasses that in other terrestrial arthropods, as e.g. the honeybee Apis mellifera or the moth Manduca sexta, by two orders of magnitude suggesting that B. latro in fact is a land-living arthropod that has devoted a substantial amount of nervous tissue to the sense of smell.
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.
Full Text Available Palaemonid shrimps form a large and diversified group distributed primarily in marine waters. Within the family Palaemonidae the subfamily Palaemoninae is composed of 26 genera and more than 370 species inhabiting marine and fresh waters in epigean and hypogean habitats. One of the relevant questions that have emerged in relation to the subfamily is how the invasion to freshwater has occurred in Mexico, where six freshwater genera belonging to the Palaemoninae (Creaseria, Cryphiops, Macrobrachium, Palaemonetes, Neopalaemon and Troglomexicanus, are present. The purpose of this study was to explore the relationships among these freshwater lineages through a phylogenetic analysis based on partial sequences of the 16S mitochondrial gene to elucidate if these genera are closely related and derived from a common ancestor or if each lineage has invaded the freshwater habitat independently. The analysis included species representing monotypic and diversified genera, from epigean and hypogean habitats and with complete and abbreviated larval development. The results suggest that the invasion of freshwater occurred on four different occasions and that the different lineages originated before the invasions of freshwater occurred.
Ridder, de Ch.; Holthuis, L.B.
During a stay at the Galapagos Islands (1975-1976), one of us (Ch. de Ridder) made a study of Gorgonaria and Antipatharia, paying special attention to commensals found with these corals. On Antipathes galapagensis Deichmann, 1941, a species of the pontoniine shrimp genus Pontonides was observed, whi
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.
Christie, Andrew E; Chi, Megan
The decapod infraorder Astacidea is comprised of clawed lobsters and freshwater crayfish. Due to their economic importance and their use as models for investigating neurochemical signaling, much work has focused on elucidating their neurochemistry, particularly their peptidergic systems. Interestingly, no astacidean has been the subject of large-scale peptidomic analysis via in silico transcriptome mining, this despite growing transcriptomic resources for members of this taxon. Here, the publicly accessible astacidean transcriptome shotgun assembly data were mined for putative peptide-encoding transcripts; these sequences were used to predict the structures of mature neuropeptides. One hundred seventy-six distinct peptides were predicted for Procambarus clarkii, including isoforms of adipokinetic hormone-corazonin-like peptide (ACP), allatostatin A (AST-A), allatostatin B, allatostatin C (AST-C) bursicon α, bursicon β, CCHamide, crustacean hyperglycemic hormone (CHH)/ion transport peptide (ITP), diuretic hormone 31 (DH31), eclosion hormone (EH), FMRFamide-like peptide, GSEFLamide, intocin, leucokinin, neuroparsin, neuropeptide F, pigment dispersing hormone, pyrokinin, RYamide, short neuropeptide F (sNPF), SIFamide, sulfakinin and tachykinin-related peptide (TRP). Forty-six distinct peptides, including isoforms of AST-A, AST-C, bursicon α, CCHamide, CHH/ITP, DH31, EH, intocin, myosuppressin, neuroparsin, red pigment concentrating hormone, sNPF and TRP, were predicted for Pontastacus leptodactylus, with a bursicon β and a neuroparsin predicted for Cherax quadricarinatus. The identification of ACP is the first from a decapod, while the predictions of CCHamide, EH, GSEFLamide, intocin, neuroparsin and RYamide are firsts for the Astacidea. Collectively, these data greatly expand the catalog of known astacidean neuropeptides and provide a foundation for functional studies of peptidergic signaling in members of this decapod infraorder. PMID:26070255
Crosnier, Alain; Chan, T. Y.
A partir de récoltes faites par l'ORSTOM (Institut de Recherche Scientifique pour le Développement en Coopération), le Service Mixte de Contrôle Biologique des Armées (SMCR) et la National Taïwan Ocean University dans d'Indo-Ouest Pacifique (à Madagascar, aux Seychelles, à Taïwan, aux Philippines, en Indonésie, aux îles Chesterfield, en Nouvelle Calédonie et en Polynésie) et des prêts de divers Museums, une révision des #Plesionika$ du groupe #narval$ est tentée. (D'après résumé d'auteur)...
Peregrino-Uriarte, Alma B; Varela-Romero, Alejandro; Muhlia-Almazán, Adriana; Anduro-Corona, Iván; Vega-Heredia, Sarahí; Gutiérrez-Millán, Luis E; De la Rosa-Vélez, Jorge; Yepiz-Plascencia, Gloria
Mitochondria play key roles in many cellular processes. Description of penaeid shrimp genes, including mitochondrial genomes are fairly recent and some are focusing on commercially important shrimp as the Pacific shrimp Litopenaeus vannamei that is being used for aquaculture not only in America, but also in Asia. Much less is known about other Pacific shrimp such as the yellowleg shrimp Farfantepenaeus californiensis and the blue shrimp Litopenaeus stylirostris. We report the complete mitogenomes from these last two Pacific shrimp species. Long DNA fragments were obtained by PCR and then used to get internal fragments for sequencing. The complete F. californiensis and L. stylirostris mtDNAs are 15,975 and 15,988 bp long, containing the 37 common sequences and a control region of 990 and 999 bp, respectively. The gene order is identical to that of the tiger shrimp Penaeus monodon. Secondary structures for the 22 tRNAs are proposed and phylogenetic relationships for selected complete crustacean mitogenomes are included. Phylogenomic relationships among five shrimp show strong statistical support for the monophyly of the genus across the analysis. Litopenaeus species define a clade, with close relationship to Farfantepenaeus, and both clade with the sister group of Penaeus and Fenneropenaeus. PMID:20403743
Pinheiro, Ludimila Carneiro; Oliveira, Guendalina Turcato
The objective of this study was to assess annual redox balance by quantifying activity of the antioxidant enzymes superoxide dismutase (SOD), catalase (CAT), and glutathione S-transferase (GST), as well as measuring lipid peroxidation levels by determination of thiobarbituric acid-reactive substances, in different tissues of male and female crayfish collected from an area little affected by anthropogenic impacts. A total of 37 male and 32 female of Parastacus brasiliensis promatensis were collected over an annual cycle, and gill, muscle, hepatopancreas, and gonad samples were harvested and subjected to the aforementioned analyses via spectrophotometry. Comparison of the annual oxidative status response profile in gill and in hepatopancreas between males and females revealed differences only in SOD activity. In abdominal muscle, this comparison revealed a distinct profile of SOD and GST activity, as well as of lipid peroxidation. SOD activity in gonads of females increased in the summer when compared to autumn; conversely, CAT and GST levels did not differ over the year. During reproduction, a possible increase of the energy requirements led to an increase in lipid peroxidation in all tested tissues, in males and females alike. It was least evident in female gonad tissue, which suggests this tissue type is relatively protected; within this context, one may establish a tissue-specific grading of Lipid Peroxidation intensity in females of the species during the spring: gonads < muscle < gills < hepatopancreas. Our results show that the responses of the defenses analyzed antioxidants, as well as lipid peroxidation levels, were sex and tissue dependent and a clear pattern of seasonal variation. PMID:27256498
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 . .
Full Text Available Two species of hippolytid shrimps, Eualus kuratai Miyake and Hayashi, 1967 and Heptacarpus igarashii Hayashi and Chiba, 1989, were collected at a sea cucumber farm from the East Sea. These species are described and illustrated for the first time in Korea. Eualus kuratai is closely related to E. middendorffi; however, it lacks a dorsomedian spine on the fourth and fifth abdominal somites. Heptacarpus igarashii can be easily distinguished from other Korean Heptacarpus species due to its short rostrum that lacks ventral teeth on margin. This report extends the previously known ranges from Japan and Korea. In Korea, both genera, Eualus and Heptacarpus, have seven species according to the present report, respectively; moreover, hippolytid shrimps now consist of 31 species of nine genera.
Bartholomei-Santos, M L; Roratto, P A; Santos, S
Species with a broad distribution rarely have the same genetic make-up throughout their entire range. In some cases, they may constitute a cryptic complex consisting of a few species, each with a narrow distribution, instead of a single-, widely distributed species. These differences can have profound impacts for biodiversity conservation planning. The genetic differentiation of four populations of Aegla longirostri, a freshwater crab found in two geographically isolated basins in Rio Grande do Sul State, Brazil, was investigated by analyzing pentanucleotide multi-loci microsatellites in a heteroduplex assay. Although no morphological differences were evident, we found significant genetic differentiation among the four populations, based on F(ST) values and clustering analysis. This high level of differentiation may be indicative of cryptic species in these populations. If this hypothesis is correct, then the species occurring in the Ibicuí-Mirim River, at the southern limit of the Atlantic Rain Forest, would be under threat, considering its very restricted distribution. PMID:22179994
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.
Full Text Available A new species of Salmoneus collected in Turkish waters is described. It appears to live in burrows associated with gobiid fish or thalassinidean decapods, as do other species in the genus. Previously, twenty Salmoneus species have been recognised worldwide, two of which are known from the Mediterranean. Some morphological features are discussed in order to determine their taxonomic value. A table summarises the geographical distribution of the 21 species currently recognised.
Four species of Lithodid crabs from the Solomon Islands were collected during the Solomon 1 cruise carried out off the Solomon Islands. One new species, Paralomis mendagnai, is described and illustrated. Three other species, Neolithodes nipponensis, Paralomis dawsoni and P. haigae, are reported for the first time from these islands. The new species of Paralomis closely resembles P. medipacifica Takeda, 1974, from Midway Islands (Central Pacific) and is characterised by the dorsal surface of t...
Odontozona addaia, a new species of stenopodid shrimp is described from a marine cave in the island of Minorca (Balearic Islands), being the first record of the genus for the western Mediterranean. One male and one ovigerous female were found during a systematic propspection of several Balearic cave
Full Text Available The occurrence of Pachygrapsus maurus and Pachygrapsus transversus is reported from the Maltese Islands for the first time on the basis of one specimen of P. maurus collected in 1990 and numerous recent specimens, and the distribution of the two species is mapped. The controversial presence of P. maurus in Italy is confirmed and two new sites for this species are reported, including the first for the mainland of Italy. The examination of the historical specimen of P. maurus from the Genova area revealed a misidentification of P. transversus; this record could be a result of ship-mediated transport. First notes on the habitat of P. maurus in the central Mediterranean Sea are given. Updated maps of the distribution of P. maurus and P. transversus in the Mediterranean are provided and the zoogeography of these species is revisited.
Full Text Available The subtropical crab, Percnon gibbesi is established along the Tunisian coasts. This crab was recorded by underwater observation from Malloula, Tabarka, El-Haouaria, Yasmine Hammamet, Monastir marina and the Kuriat Islands. These new observations increase the known distribution of P. gibbesi in the south Mediterranean basin.
Rafael A. Gregati; Maria L. Negreiros-Fransozo
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 r...
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.
Van Wormhoudt, Alain; Le Moullac, Gilles; Klein, Birgit; Sellos, Daniel
Las tripsinas, entre las proteasas, y las amilasas, entre las carbohidrasas, son las enzimas más activas en Penaeus vannamei, un camarón de interés comercial, especialmente en Latinoamérica. Estas enzimas y sus cDNAS fueron caracterizados. En lo que respecta a las tripsinas, se reconocieron cinco isoformas y se analizaron sus cDNAs correspondientes, los cuales codifican una preproenzima de 225 aminoácidos conteniendo un supuesto precursor peptídico de 14 residuos y una secuencia señal alta...
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.
During the 1977-1978 Royal Geographical Society Mulu (Sarawak) Expedition a number of Decapod Crustacea was obtained. Some were collected by Mr. Philip Chapman in the course of studies of the invertebrates of the limestone caves in the Gunong Mulu National Park, 4th Division of Sarawak, and the Niah
Brandt, Angelika; Poore, Gary C.B.
Tridentella namibia n. sp. and T. benguela n.sp. (Crustacea: Isopoda: Tridentellidae) are described from the shelf and slope off the coast of Namibia, south-western Africa. A key is provided to all the 16 species in the genus and distributional information tabulated.
Wägele, Johann Wolfgang
Apanthuretta lathridia n. sp. (Crustacea: Isopoda: Anthuridea), the fifth species of the genus Apanthuretta Wägele, is described from interstitial water of a Cuban beach. A high number of morphological similarities with Apanthuretta pori Wägele (Red Sea) is noted.
Full Text Available The International Union for Conservation of Nature has cited Eriocheir sinensis as one of the world’s worst 100 invasive species. Outsidetheir native range, this alien species has had adverse impacts, both ecologically and economically, on river catchments. Understanding thelife cycle of the Chinese mitten crab, especially details of the migration period, is important for the potential control of this exotic species.The mitten crab has been reported from the River Thames, London, England and in this watershed the population continues to increase innumbers, disperse in a westerly direction and reports of a downstream migration date back to 1996. Recently, regular collections from arubbish screen at a River Thames water abstraction point were used to monitor the migration of adult crabs over three years (2008–2010.Details of size, sex and condition of the crabs were recorded as were data on the abstracted flow. The main migration period runs fromAugust to early November with peak numbers of crabs recorded in September/early October. In all years the sex ratio of captured crabs washeavily skewed towards males, which were significantly larger than females. Furthermore there is some evidence that female crabs movelater in the migration period than males and that peaks in numbers of both male and female crabs are associated with full moon periods; peaknumbers demonstrating significant lunar periodicity. In addition there is a weak association between crab numbers and abstraction flow rate.The key findings are used to recommend the timing of any future control measures that might be designed to reduce the population of thisinvasive species in the River Thames. These recommendations could also be applied to other river catchments where the species isproblematic.
OROGUN ENAKEME O
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Investigation into some aspects of the biology and ecology of the freshwater crab, Sudanonautes floweri(De Man, 1901 in River Ogbomwen, Edo State, southern, Nigeria was carried out between February and July 2006. The study revealed that the crab species were widespread and abundant in the river. Abundance in terms of number and biomass was more during the wet season with at a peak in the months of June and July. The crab grew allometrically attaining a maximum total length and weight of 11.5 cm and 65 g respectively. The condition factor ranged from 8.60-9.45. These values did not vary with size and sex of the crab but showed seasonal variations. Females of Sudanonautes floweriwere more abundant although not significantly different from the expected 1:1 ratio. There were some sexually matured females with stages III gonad development. Fecundity estimate ranged from 400 to 650 eggs. The gonadosomatic index varied between 14.97 and 24.11%. Feeding habits varied slightly with size with larger sized crabs feeding on more and varied food particles. Generally, Sudanonautes flowerifed predominantly on detritus, crustaceans, fish, algae, filaments, diatoms and sand grains.
Cobo Valter José
Full Text Available This study evaluated the influence of the water and air temperatures, pluviosity and photoperiod on the breeding season of Goniopsis cruentata (Latreille, 1803, in Ubatuba littoral, southeastern Brazilian coast. Monthly collections were conducted out from January/95 to December/96 in an estuarine area from 23º29'10"-23º29'45"S to 45º09'10"-45º10'00"W. Water and air temperature variation showed the highest correlation coefficient with the frequency of ovigerous females, r² = 0.73 and 0.68, respectively. However, an analysis of the set of environmental variables, revealed the photoperiod as the factor of highest association with the ovigerous frequency (r² = 0.68. This degree of association allow us to suggest that the breeding season duration of G. cruentata might have some variations over different latitudes, and such results could be quite diverse in populations from different latitudes.
Variaciones temporales en la composición y abundancia de cuatro especies de Cancer (Decapoda: Brachyura: Cancridae capturadas con trampas en bahía San Vicente, Concepción (Chile central Seasonal variations in the composition and abundance of four Cancer species (Decapoda: Brachyura: Cancridae trapped in San Vicente Bay, Concepción (central Chile
Carlos A Muñoz
Full Text Available Se analiza la composición y distribución de las capturas de las principales especies de crustáceos decápodos braquiuros, realizadas por pescadores artesanales en la zona costera de la península de Hualpén (Concepción. Además, se contrastaron y relacionaron estos patrones con la variación de temperatura y profundidad de extracción. Las capturas a lo largo del año estuvieron fundamentalmente representadas por cuatro especies del género Cancer, especialmente en otoño 2003, cuando fue más abundante C. porteri. Sin embargo, esta especie estuvo poco representada el resto del año, para volver a ser dominante en el verano siguiente. C. coronatus, C. setosus y C. edwardsi fueron poco abundantes en el verano, pero aparecieron en mayor cantidad durante el resto del año. La variación, en la composición de especies y distribución espacial de las capturas se relacionaría con migraciones estacionales, asociadas con la ocurrencia de frentes de mal tiempo que afectan la zona en invierno. Las relaciones significativas entre la abundancia y temperatura apoyan la ocurrencia de estas migraciones. Adicionalmente, se realizaron experimentos de captura, marcaje y recaptura para determinar parámetros poblacionales de las especies en estudio. Aunque la tasa general de recaptura fue muy baja, los resultados sugieren un alto grado de movilidadThis study analyzes the composition and distribution of the main brachyuran decapod crustacean species caught by small-scale fishermen in the coastal area off the Hualpén Peninsula (Concepción. These patterns were then compared and related to variations in temperature and extraction depth. The catches throughout the year were basically represented by four Cancer species, especially in autumn 2003, when C. porteri was most abundant. This species was under-represented during the rest of the year and dominant again the following summer. C. coronatus, C. setosus, and C. edwardsi were not very abundant in summer, but appeared in greater quantities during the rest of the year. This variation in species composition and spatial distribution of the catches was related to seasonal migrations, which were associated with the occurrence of bad weather fronts that affect the area in winter. The significant relationships between abundance and temperature support the occurrence of these migrations. Moreover, experiments (catch, marking, re-catch were done to determine the population parameters of the species under study. Although the general re-catch rate was very low, the results suggest a high degree of mobility
Reproductive biology of the sesarmid crab Armases rubripes (Decapoda, Brachyura from an estuarine area of the Sahy River, Sepetiba Bay, Rio de Janeiro, Brazil Biologia reprodutiva do caranguejo sesarmídeo Armases rubripes (Decapoda, Brachyura de uma área estuarina do rio Sahy, Baía de Sepetiba, Rio de Janeiro, Brasil
Giovana V. Lima
Full Text Available The aim of this work was to gain knowledge about reproductive biology of the crab Armases rubripes (Rathbun, 1897 from an estuarine area of the Sepetiba Bay. Samples were taken monthly from February 2003 to January 2004 in the Sahy River estuary (22º56'S; 44º01'W, Rio de Janeiro, Brazil. The crabs were collected by hand during 15-minute catch-effort sessions conducted by two people. In the laboratory, the specimens were separated by sex, carapace width was measured and gonadal stage was checked macroscopically. A total of 830 individuals were caught - 304 males, 373 females (60 ovigerous females and 153 juveniles. The ovigerous females were found almost year-round, except in November and April, showing a continuous reproductive period. They presented a size range from 8.2 to 15.0 mm carapace width (12.1 ± 1.7 mm. Color and macroscopical aspects determined five gonadal stages for males and females (immature, rudimentary, intermediary, developed and resting. First sexual maturity was estimated at 6.5 mm of carapace width for males and 8.1 mm for females. Individual fecundity varied from 200 to 11,460 eggs (4,458 ± 2,739 eggs. Mean egg size was 0.248 ± 0.026 mm, varying from 0.213 to 0.333 mm, while the volume ranged from 0.0051 to 0.0188 mm³ (0.0082 ± 0.0029 mm³.O objetivo desse trabalho foi obter informações sobre a biologia reprodutiva do caranguejo Armases rubripes (Rathbun, 1897 numa área estuarina da Baía de Sepetiba. Exemplares foram obtidos mensalmente de fevereiro 2003 a janeiro 2004 no estuário do rio Sahy (22º56'S; 44º01'W, Rio de Janeiro, Brasil. Os caranguejos foram coletados manualmente durante 15 minutos por estação de coleta e por dois coletores. Em laboratório, os indivíduos foram separados por sexos, mensurados em relação à largura da carapaça e os estágios gonadais observados macroscopicamente. Um total de 830 indivíduos foram obtidos - 304 machos, 373 fêmeas (60 fêmeas ovígeras e 153 juvenis. As fêmeas ovígeras foram encontradas durante todo o período de estudo, exceto em novembro e abril, demonstrando um período reprodutivo contínuo. O tamanho das fêmeas ovígeras variou entre 8,2 e 15,0 mm de largura da carapaça (12,1 ± 1,7 mm. As gônadas observadas apresentaram cinco estágios de desenvolvimento, de acordo com a coloração e o aspecto macroscópico (imatura, rudimentar, intermediária, desenvolvida e desovada. A maturidade sexual foi estimada aos 6,5 mm de largura da carapaça entre os machos e 8,1 mm entre as fêmeas. A fecundidade individual variou entre 200 e 11.460 ovos (4.458 ± 2.739 ovos. O tamanho médio dos ovos foi de 0,248 ± 0,026 mm, variando entre 0,213 e 0,333 mm, enquanto o volume variou entre 0,0051 e 0,0188 mm³ (0,0082 ± 0,0029 mm³.
La temperatura como factor de variabilidad en el desarrollo y morfología de larvas zoeas de Acanthocyclus hassleri Rathbun (Decapoda, Brachyura, Atelecyclidae cultivadas en laboratorio Temperature as factor in variability of the development and morphology of zoeae larvae of Acanthocyclus hassleri Rathbun (Decapoda, Brachyura, Atelecyclidae reared in the laboratory
Erwin M Barría
Full Text Available Se cultivaron larvas zoeas de Acanthocyclus hassleri Rathbun a 10, 17 y 20ºC, evaluando la sobrevivencia, tiempo de desarrollo, tamaño larval, tamaño de diferentes estructuras larvales y proporción morfométrica de esas estructuras respecto del tamaño larval. El desarrollo larval de A. hassleri comprende cuatro estadios zoea (ZI-ZIV y una megalopa. La mayor sobrevivencia promedio fue de 95,2% a 20ºC en ZIV, cayendo drásticamente a un 13,2% en la megalopa. El tiempo de desarrollo osciló entre 80,2 ± 3,2 y 28,2 ± 0,9 días a 10 y 20ºC respectivamente. La ZI a 20ºC y ZII, ZIII y ZIV a 17ºC alcanzaron las mayores tallas larvales. El incremento de tamaño de la espina rostral, cefalotórax, abdomen y telson fue directamente proporcional a la temperatura de cultivo; mientras que para la espina dorsal, antena y ambos maxilípedos esos incrementos fueron inversamente proporcionales a la temperatura de cultivo. Los valores de proporción morfométrica de la espina rostral y abdomen permanecieron constantes; para el cefalotórax y telson disminuyó en los estadios ZIII y ZIV; mientras que para la espina rostral, espina dorsal, antena y ambos maxilípedos los tamaños relativos fueron significativamente mayores a 10ºC que a 17 y 20ºC, a partir del estadio ZII. Los resultados de este estudio sugieren una alta capacidad de resistencia a la temperatura de las larvas zoeas de A. hassleri, no así de las megalopas. Tal capacidad por parte de las zoeas, se relaciona con un alto nivel de plasticidad morfo-adaptativa a la temperatura ambiental, planteando un modelo de adecuación morfológica gradual asociada con la temperatura de cultivoZoeae larvae of A. hassleri were reared at 10, 17 and 20ºC, evaluating their survival, duration of larval life, larval size, sizes of different larval structures and morphometric proportions among structures with respect to larval size. Larval development of A. hassleri included four zoeal stages (ZI-ZIV and one megalopa. The highest mean zoeal survival rate was 95.2% at 20ºC in ZIV, decreasing to 13.2% in megalopae. Time of zoeal developmment fluctuated between 80.2 ± 3.2 d at 10ºC and 28.2 ± 0.9 d at 20ºC. The largest larval sizes were reached by ZI at 20ºC, and ZII-IV at 17ºC. Growth in size of the rostral spine, cephalothorax, abdomen and telson were directly proportional to culture temperature; growth of the dorsal spine, antenna, and both maxillipeds were inversely proportional to culture temperature. Morphometric proportion values between the rostral spine and abdomen remained constant; for cephalothorax and telson, the proportion disminished in stages ZIII and ZIV; those of the rostral spine, dorsal spine, antenna and both maxillipeds were significately higher at 10ºC than at 17 and 20°C from the ZII stage onward. Results suggest a high capacity for thermal resistence in the zoeae of A. hassleri but not in its' megalopae. This capacity of the zoeae represents a high level of morpho-adaptive plasticity to temperature, suggesting a model of morphological plasticity associated with the culture temperature
Kotov, Alexey A; Fuentes-Reinés, Juan M
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. PMID:26624722
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.
Evaluación en laboratorio de la toxicidad aguda de los insecticidas malatión y deltametrina en Chasmagnathus granulata Dana (Crustacea, Brachyura, Grapsidae) Laboratory evaluation of the acute toxicity of malathion and deltamethrin in Chasmagnathus granulata Dana (Crustacea, Brachyura, Grapsidae)
Adriana A. Ferrero; María M. Gutiérrez; Patricia M. Cervellini
RESUMEN. Se evaluó la toxicidad aguda de los insecticidas malatión y deltametrina en el cangrejo estuarial Chasmagnathus granulata en condiciones de laboratorio. Se llevaron a cabo tests estáticos con el objeto de estimar el parámetro CL50 (concentración letal 50%). Se utilizaron adultos machos con un ancho de caparazón que varió entre 20,9 ± 0,73 y 33,0 ± 2,94 mm. La toxicidad de los compuestos varió sustancialmente, no observándose diferencias significativas (p>0,05) con respecto al ancho d...
Ciclo reprodutivo do caranguejo violinista Uca rapax (Smith) (Crustacea, Brachyura, Ocypodidae) habitante de um estuário degradado em Paraty, Rio de Janeiro, Brasil Reproductive cicle of the fiddler crab Uca rapax (Smith) (Crustacea, Brachyura, Ocypodidae) at a degraded estuary in Paraty, Rio de Janeiro, Brazil
Daniela da S. Castiglioni; Maria L. Negreiros-Fransozo
Este trabalho descreve o ciclo reprodutivo de Uca rapax (Smith, 1870) baseado em observações do seu desenvolvimento gonadal e ciclo de muda em uma área de manguezal degradado em Paraty, Estado do Rio de Janeiro. Os caranguejos foram capturados por duas pessoas mensalmente (julho/2001 a junho/2002) durante 15 minutos por meio da técnica de esforço de captura em período de maré baixa. No laboratório, os caranguejos foram mensurados quanto à largura da carapaça (LC); sendo o sexo, a condição oví...
Ciclo reprodutivo do caranguejo violinista Uca rapax (Smith (Crustacea, Brachyura, Ocypodidae habitante de um estuário degradado em Paraty, Rio de Janeiro, Brasil Reproductive cicle of the fiddler crab Uca rapax (Smith (Crustacea, Brachyura, Ocypodidae at a degraded estuary in Paraty, Rio de Janeiro, Brazil
Daniela da S. Castiglioni
Full Text Available Este trabalho descreve o ciclo reprodutivo de Uca rapax (Smith, 1870 baseado em observações do seu desenvolvimento gonadal e ciclo de muda em uma área de manguezal degradado em Paraty, Estado do Rio de Janeiro. Os caranguejos foram capturados por duas pessoas mensalmente (julho/2001 a junho/2002 durante 15 minutos por meio da técnica de esforço de captura em período de maré baixa. No laboratório, os caranguejos foram mensurados quanto à largura da carapaça (LC; sendo o sexo, a condição ovígera e o estágio gonadal anotados. Os estágios de desenvolvimento gonadal foram determinados por meio da observação macroscópica das gônadas e os estágios de muda através da observação do grau de enrijecimento do tegumento. Os caranguejos que apresentavam gônadas imaturas e rudimentares foram considerados imaturos enquanto os demais estágios gonadais, maduros. Obteve-se um total de 1558 espécimes, sendo 801 machos e 757 fêmeas (16 fêmeas ovígeras. As fêmeas ovígeras representaram apenas 3% da população, talvez pelo fato destas fêmeas permanecerem em suas tocas. Apesar de terem sido encontrados caranguejos com gônadas maduras ao longo de todo o ano, o período de maior atividade reprodutiva em U. rapax ocorre nos meses mais quentes do ano (primavera-verão. A freqüência de caranguejos em atividade de muda ao longo do período de estudo foi baixa (12,8% em relação aos caranguejos em intermuda. Provavelmente, U. rapax permaneça entocada nesse período crítico, que é a troca do exoesqueleto. Apesar de U.rapax ocorrer em um manguezal completamente degradado, o seu ciclo reprodutivo não foi afetado, quando comparado com de áreas não degradadas estudadas anteriormente. Tal fato pode ser sustentado pela presença de caranguejos potencialmente maduros ao longo do ano todo na área de estudo.This present work describes the reproductive cycle of Uca rapax (Smith, 1870 based on observations of their gonadal development and molt cycles in a degraded mangrove area in Paraty, State of Rio de Janeiro. Two collectors captured the crabs monthly (from July 2001 to June 2002 during 15 minutes by procedure of capture per unit effort in low tide periods. Crabs were sexed, measured (carapace width - CW; 0.01 mm precision and females were checked for eggs. Crab' stages of gonad development of both sexes were determined by direct and macroscopic observation and molt stage was estimated by the hardness of the tegument. A total of 1,558 specimens were collected, being 801 males and 757 females (16 ovigerous females. Ovigerous females accounted only about 3% of the population, perhaps because females usually remain underground in closed burrows during the incubation, which can not be seen easily in the field. Crabs with mature gonads were found year-round, but most reproduction in U. rapax occurred during the warmer months of the year (spring-summer. The frequency of crabs in molt activity was lower (12.8% than intermolt crabs. Probably, U. rapax burrowed in this critic period that is the change of exoskeleton, minimizing the risks imposed by the occurrence of a soft skeleton. Despite of U. rapax be occurring in a properly degraded mangrove, its reproductive cycle seems to be not affected by the habitat condition, when it is compared with areas of the mangroves no impacted by human action. This fact is supported by the presence of potentially mature crabs year-round at the study area.
Size at sexual maturity of female crabs Sesarma rectum Randall (Crustacea, Brachyura and ontogenetic variations in the abdomen relative growth Tamanho da maturidade sexual de fêmeas do caranguejo Sesarma rectum Randall (Crustacea, Brachyura e variações ontogenéticas no crescimento relativo do abdômen
Maria H. de A. Leme
Full Text Available The aim of the present study was to ascertain the size at sexual maturity in females of the crab Sesarma rectum Randall, 1840 by comparing gonadal maturity to morphologic maturity (using abdomen-width data. The relative growth of the abdomen was analysed for all growth phases (for each 3-mm carapace width size class, and the slopes of the separate allometric relationships were compared through analysis of covariance (ANCOVA from log e-transformed data to detect changes in the level of allometry during ontogeny. The physiological size at maturity (gonadal criteria was determined through a logistic curve, indicating the size at which 50% of females presented mature gonads (M50 = 17.4 mm CW. The highest allometric levels occurred in growth phases 2 and 3 (body sizes ranging from 15 to 21 mm CW, indicating faster growth of the abdomen during those phases. Phases 1 (O objetivo do presente estudo foi determinar o tamanho da maturidade sexual em fêmeas do caranguejo Sesarma rectum através de comparações da maturidade gonadal com a maturidade morfológica (usando dados da largura do abdômen. O crescimento relativo do abdômen foi analisado para todas as fases de crescimento (para cada classe de tamanho de 3 mm de largura de carapaça e os coeficientes de regressão foram comparados para cada relação alométrica através de analises de covariância (ANCOVA após transformação logarítmica dos dados, afim de detectar mudanças nos níveis da alometria ao longo da ontogenia. O tamanho da maturidade sexual fisiológica (critério gonadal foi determinado através de uma curva logística, indicando o tamanho no qual 50% das fêmeas apresentaram gônadas maduras (M50 = 17.4 mm LC. Os maiores níveis alométricos ocorreram nas fases de crescimento 2 e 3 (tamanho de corpo variando de 15 a 21 mm LC, indicando acentuado crescimento do abdômen durante estas fases. Crescimento isométrico ocorreu nas fases 1 (< 15 mm LC e fases 4 e 5 (classes de tamanho acima de 21 mm LC. No local de estudo, um manguezal localizado na costa norte do Estado de São Paulo, indivíduos fêmeas de S. rectum começam a atingir a maturidade sexual a partir de 15 mm de LC, quando os coeficientes de regressão das relações da largura do abdômen contra a largura da carapaça tornam-se positivamente alométricos, indicando taxa de crescimento diferencial. Uma gradual diminuição na inclinação da reta, tendendo a isometria, ocorre ao longo da ontogenia conforme as fêmeas tornam-se maiores (mais velhas.
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, Province of Gelderland, The Netherlands (fig. 2). In total 1464 squares of 100 x 100 m (utm) (fig. 9) were sampled by hand from 1991 up to 1998 (Table 1). On a recording form (fig. 5) five first order h...
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.
Góes, C A; Lins-Oliveira, J E
The natural diet of the spiny lobster (Panulirus echinatus) from the São Pedro and São Paulo Archipelago was determined by stomach contents analysis of sixty-eight adult lobsters collected during October 2002, March, July and August 2003. Food items were grouped by gross taxa representing 11 food categories. Analysis included a qualitative (Frequency of Occurrence of item i--FOi) and a quantitative method (Volume of item i--Vi). A Feed Index (FI = FOi x Vi / 100) proposed by Lauzanne (1975) was also used to indicate the importance of each food category (> 50: dominant, 25-50: essential, 10-25: unimportant, algae, calcareous algae, and rocks. The remaining food categories contributed to less than 30% of FOi and 10% of Vi. Although the Feed Index revealed no dominant food category in the diet of P. echinatus, fish was considered essential, crustaceans unimportant, and the remaining food categories were classified as secondary. According to the analysis, P. echinatus can be properly classified as an omnivorous and a generalist species, because it consumes a great diversity of organisms in several trophic levels. This species presents an opportunistic behaviour, feeding on the prey available at substratum. Future studies should address variations in natural diet related to sex, reproductive cycle, and seasonality. PMID:19347157
Poupin, Joseph; Quod, Jean-Pascal; Zubia, Mayalen; Bollard, Stéphanie; Barrère, Alain; Magalon, Hélène
Les crustacés décapodes récoltés dans la zone marine située au pied du volcan du Piton de la Fournaise à La Réunion, entre 0-800 m, sont étudiés à partir de récoltes faites en plongées (0-80 m) ou aux casiers (300-800 m). Au total 69 espèces sont reconnues. Dix huit de ces espèces sont signalées pour la première fois à La Réunion, dont 12 déterminées avec certitude : Anapagrides reesei, Carupella natalensis, Coralliocryptus caementa, Dardanus pedunculatus, Lophozozymus pulchellus, Lybia plumo...
A new species, Cherax (Astaconephrops) pulchersp. n., from Hoa Creek, close to the village Teminabuan in the southern-central part of the Kepala Burung (Vogelkop) Peninsula, West Papua, Indonesia, is described, figured and compared with the morphologically closest species, Cheraxboesemani Lukhaup & Pekny, 2008. PMID:26019660
Lukhaup, Christian; Panteleit, Jörn; Schrimpf, Anne
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. PMID:26448698
Full Text Available A new species, Cherax (Astaconephrops pulcher sp. n., from Hoa Creek, close to the village Teminabuan in the southern-central part of the Kepala Burung (Vogelkop Peninsula, West Papua, Indonesia, is described, figured and compared with the morphologically closest species, Cherax boesemani Lukhaup & Pekny, 2008.
Garm, A; Høeg, J T
mandibles, the movement pattern gets increasingly stereotypical, with the mandibles performing but a single movement in a medio-lateral plane. From morphology, the mouthparts are subdivided into 20 parts, but from the functional analyses the 20 parts form 8 functional groups: 1, transporting mouthparts...... (maxilliped 2 endopod and maxilliped 3 endopod); 2, transporting-aligning mouthparts (maxilliped 1 basis); 3, sorting-aligning mouthparts (maxilla 1 basis and maxilla 2 basis); 4, current-generating mouthparts (flagella of maxilliped 2 and maxilliped 3 exopods); 5, cutting-crushing mouthparts (incisor and...
Le Moullac, Gilles; Van Wormhoudt, Alain
L'activité des enzymes digestives (trypsine, chymotrypsine et amylase) au cours des premiers stades larvaires de Penaeus vannamei est étudiée en relation avec l'alimentation. Les microparticules à base de caséine diminuent le contenu protéique soluble et les activités enzymatiques. L'activité spécifique de la trypsine est corrélée (p
Komai, Tomoyuki; Okuno, Junji; Minemizu, Ryo
The caridean shrimp genus Thor Kingsley, 1878 (Thoridae) is currently represented by 14 species distributed in shallow tropical to subtropical waters in the Indo-Pacific, East Pacific and West Atlantic oceans. In this study, two species of the genus are reported on the basis of material from Okinawa and Kume islands in the Ryukyu Archipelago, southern Japan. Thor leptochelus (Xu & Li, 2015) n. comb., recently described from Xisha Islands, China and originally assigned to Thinora Bruce, 1997, is transferred to Thor. Relationship of the species to three congeneric species (T. cordelli Wicksten, 1996, T. spinipes Bruce, 1983 and T. spinosus Boone, 1935) is discussed. The second is T. marguitae Bruce, 1973, representing the rediscovery since the original description and new record for Japanese waters. The four specimens of T. leptochelus were all free-living, whereas the single specimen of T. marguitae was found to be associated with a solitary fungiid coral, as previously reported. PMID:26623904
Full Text Available The capture of juvenile shrimp as live bait for sport fishing has intensified, as has the trade of shrimp in different locations. The transport of shrimp to regions, other than those in which they are captured, is often poorly performed due to the lack of information regarding effective transport, resulting in high mortality of the transported animals. The aim of this study was to determine the optimum stocking density for the transport of juvenile Farfantepenaeus brasiliensis (weight: 5.53 ± 1.20 g and to evaluate the effect of the addition of hydrated lime in the transport water. Four stocking densities were tested for transport (1, 2, 3 and 4 ind L-1. Following the analysis of the results obtained in the density experiment, the addition of hydrated lime (0.15 g L-1 in the transport water was also tested. Water quality and the final survival were negatively correlated with increasing stocking density. The results of this study demonstrated that the highest density that can be used to avoid mortality is 3 ind L-1 for a maximum period of 10 h. The use of hydrated lime in the transport water attenuated the observed effects on water quality parameters.
Les travaux présentés dans ce mémoire ont été motivés par l’importance économique de l’élevage de la crevette bleue du pacifique Litopenaeus stylirostris dont les fortes mortalités sont principalement dues au développement de maladies bactériennes et virales. Ils ont consisté en la caractérisation des deux premiers membres d’une famille originale de peptides multifonctionnels présents chez les crevettes pénéides, les stylicines. Ces peptides, nommés stylicines 1 et 2, sont des peptides anioni...
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.
Full Text Available Euastacus morgani sp. n., is described from a highland, rainforest site in Bindarri National Park, in eastern New South Wales, Australia. Euastacus morgani is found living sympatrically with two more common species, E. dangadi Morgan, 1997 and E. neohirsutus Riek, 1956. Systematically, the species belongs in the ‘simplex’ complex of the genus that includes E. simplex Riek, 1956, E. clarkae Morgan, 1997, E. maccai McCormack and Coughran 2008 and E. morgani. This new species differs from its nearest congenor, E. simplex, inthree mesial carpal spines. A key to the ‘simplex’ complex is presented.
Davi de Oliveira
Full Text Available O tamanho da primeira maturação sexual (TPM em Aegla platensis Schmitt, 1942 foi estimado através das mudanças nas proporções de dimensões corporais dos animais. Para isso, foram realizadas coletas mensais, de julho de 2007 a junho de 2008 no Lajeado Bonito (27º25'27''S, 53º24'39''W, um tributário de primeira ordem do Rio da Várzea, município de Frederico Westphalen, Rio Grande do Sul. Foram utilizados 437 machos com comprimento de cefalotórax (CC variando de 6,00 mm a 31,75 mm e 368 fêmeas, com tamanhos entre 6,08 mm e 27,92 mm de CC. As seguintes dimensões corporais foram mensuradas em todos os indivíduos coletados: comprimento do cefalotórax (CC, largura do abdome (LA, comprimento do própodo do quelípodo direito (CPD e comprimento do própodo do quelípodo esquerdo (CPE. Após o registro dessas medidas, os animais foram devolvidos ao mesmo local de captura. As análises de maturidade sexual morfológica foram realizadas com auxílio do software Mature 2, nas quais foram utilizadas as medidas de CC, considerada como variável independente e relacionada com as demais dimensões. As relações que melhor se ajustaram para estas análises, em machos, foram CPD x CC (TPM: CC=18,2 mm e CPE x CC (TPM: CC=20,1 mm e LA x CC (TPM: CC=16,5 mm nas fêmeas.
Maria Paloma Jimenez Alvarez
Foram estudados os estágios de desenvolvimento de Lucifer faxoni Borradaille ao largo de Santos, São Paulo, Brasil (24º16"S, 46º00W). A maturidade foi estabelecida em relação ao tamanho do somito pré-bucal As estações de maior abundãncia dos espécimes maduros, imaturos e larvais foram determinadas.The developmental stages of Lucifer faxoni Boradaille were studied off Santos, São Paulo, Brazil (24º16'S, 46º00'W). The maturity was established and related to the pre-buccal smite length. The seas...
Maria Paloma Jimenez Alvarez
Full Text Available Foram estudados os estágios de desenvolvimento de Lucifer faxoni Borradaille ao largo de Santos, São Paulo, Brasil (24º16"S, 46º00W. A maturidade foi estabelecida em relação ao tamanho do somito pré-bucal As estações de maior abundãncia dos espécimes maduros, imaturos e larvais foram determinadas.The developmental stages of Lucifer faxoni Boradaille were studied off Santos, São Paulo, Brazil (24º16'S, 46º00'W. The maturity was established and related to the pre-buccal smite length. The seasons of greater abundance of mature, immature and larval specimens were determined.
Douglas F. R. Alves
Full Text Available This study aimed to describe the species composition and abundance of the porcellanid crabs inhabiting the consolidated sublittoral off an island on the southeastern coast of Brazil. During a sampling program at Vitória Island (23º44'S, 45º01'W, collections were carried out monthly from February 2004 through January 2006. The crabs were hand-caught by SCUBA divers during the daytime. The greatest carapace width (CW was measured, and the sex and developmental stage were identified for each crab. The specimens were grouped into five demographic categories: juvenile males, adult males, juvenile females, adult females, and ovigerous females. A total of 275 crabs belonging to three genera and six species were obtained. Petrolisthes amoenus (Guérin-Méneville, 1855 and Pachycheles riisei (Stimpson, 1858 were the most abundant species. Most of the demographic classes were represented for both species, except that no adult females of P. riisei were recorded. Among the porcellanids, Pachycheles monilifer (Dana, 1852 was the dominant species; it comprised more than 75% of the total individuals sampled, and showed the highest constancy index for the region. The results obtained in this study provided information regarding the faunal composition and the relative abundance of the species, which will be useful as a reference for other sublittoral consolidated-bottom regions along the southeast Brazilian coast.
Douglas F. R. Alves; Samara de P. Barros-Alves; Valter J. Cobo
This study aimed to describe the species composition and abundance of the porcellanid crabs inhabiting the consolidated sublittoral off an island on the southeastern coast of Brazil. During a sampling program at Vitória Island (23º44'S, 45º01'W), collections were carried out monthly from February 2004 through January 2006. The crabs were hand-caught by SCUBA divers during the daytime. The greatest carapace width (CW) was measured, and the sex and developmental stage were identified for each c...
Present distribution and future spread of louisiana red swamp crayfish Procambarus clarkii (Crustacea, Decapoda, Astacida, Cambaridae in Britain : Implications for conservation of native species and habitats
Full Text Available The Louisiana red swamp crayfish Procambarus clarkii is highly invasive. It is now common in Europe where it is causing problems to native wildlife and structural damage to habitats. Procambarus clarkii was first recorded in Britain in 1991 and is currently found in the Hampstead Heath ponds and Regents Canal in London, as well as a small lake 15 km outside of Greater London. This paper considers how conditions in Britain affect the life cycle, breeding habits and potential range expansion of P. clarkii. Results of trapping surveys are presented in an effort to map the current distribution of P. clarkii and predict which areas it could colonise in the future. The ecological impact of potential colonisation is discussed by considering the impact P. clarkii has in mainland Europe. It is concluded that P. clarkii is likely to spread from Regents Canal into the nearby Brent, Crane, Colne, Lee and Thames catchments within 50 years. This time would be reduced significantly if further deliberate or accidental introductions by humans occur since this is deemed a far greater risk than natural expansion. P. clarkii is expected to have a negative impact on aquatic ecosystems in Britain and therefore tighter enforcement is needed to slow the spread of this species.
Albertoni Edélti Faria; Palma-Silva Cleber; Esteves Francisco de Assis
Three species of shrimp, Farfantepenaeus brasiliensis (Latreille, 1817), F. paulensis (Pérez-Farfante, 1967) (Penaeidae) and Macrobrachium acanthurus (Wiegmann, 1836) (Palaemonidae) were sampled at the Imboassica lagoon (Rio de Janeiro State, Brazil), in order to estimate the overlap of dietary niches and electivity of their prey, through the analysis of the fauna associated with the macroalgae Chara and of the benthic fauna on the sediment. The overlap of dietary niches was estimated using f...
Edélti Faria Albertoni
Full Text Available Three species of shrimp, Farfantepenaeus brasiliensis (Latreille, 1817, F. paulensis (Pérez-Farfante, 1967 (Penaeidae and Macrobrachium acanthurus (Wiegmann, 1836 (Palaemonidae were sampled at the Imboassica lagoon (Rio de Janeiro State, Brazil, in order to estimate the overlap of dietary niches and electivity of their prey, through the analysis of the fauna associated with the macroalgae Chara and of the benthic fauna on the sediment. The overlap of dietary niches was estimated using five indexes. A total of 495 F. brasiliensis, 131 F. paulensis and 102 M. acanthurus stomachs were examined. The results of the different indexes of niche overlap exhibited the same general trend in the three species, indicating a high degree of homogeneity in the diet of the two species of Penaeidae (between 75 and 100% and a smaller overlap between each Penaeidae species and M. acanthurus (between 23 and 68%. The species presented selective predation, with differences in the two studied habitats. The results show that the three species are omnivorous, with a varied diet including components of benthic macrofauna and those associated with the macroalgae Chara, plant fragments and detritus, and that there are good conditions in the Imboassica lagoon for the development of these species.
Full Text Available The red claw crayfish Cherax quadricarinatus is native to freshwater habitats of northern Australia and Papua New Guinea. Its high reproductive and adaptive capacity in different environments allows it to be cultivated, where escaped individuals have established wild populations in countries far from their natural range. In the late 90's and beginning of the 21st century, this crayfish was introduced illegally along the coast of southern Jalisco. Mismanagement led to escape and dispersion. Currently there are wild crayfish in the Cajón de Peñas Reservoir and surrounding streams in northern Jalisco, Mexico. The aim of this study was to evaluate the presence of C. quadricarinatus in fisheries in this area of Jalisco and analyze its importance in generating economic benefits for fishermen, comparing these results with those of the fishery for M. americanum, whose fishery is traditional. To catch specimens, traps were set for 24 h in the La Sanja Stream and the Cajón de Peñas Reservoir. The results of the survey showed that C. quadrica rinatus is an important part of the crustacean catch in this area: 32% of the total catch in the stream corresponded to C. quadricarinatus and the rest to M. americanum. While 85% of the catch in the dam corresponded to C. quadricarinatus, only 15% referred to M. americanum. Crayfish fishing in the reservoir is now an important part of the productive activity of local families dependent on fishing. The ecological consequences of wild crayfish proliferation remain to be studied.
Rodríguez, Alfredo; Rueda, Mario; Luis A Cubillos
En Colombia, Solenocera agassizi es una de las especies que sustenta la pesquería del camarón de aguas profundas (CAP) que opera en el Pacífico, constituyéndose en una de las más relevantes para la economía nacional. El conocimiento de los aspectos reproductivos es fundamental para la conservación del recurso y en particular la distribución de las agregaciones reproductivas es desconocida. Con el objeto de determinar la estructura espacial de S. agassizi y su relación con las condiciones a...
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
José Luis Arredondo-Figueroa
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.
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
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.
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
Edilson Matos; Patrícia Matos; Laura Corral; Carlos Azevedo
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....
A new species of Foza Reed & Cumberlidge, 2006 from northern Madagascar (Decapoda, Brachyura, Potamoidea, Potamonautidae, with a redescription of F. goudoti (H. Milne Edwards, 1853 comb. n., and comments on Skelosophusa prolixa Ng & Takeda, 1994
Full Text Available Foza ambohitra sp. n. is described from Ambohitra, Antsiranana Province, northern Madagascar at 421 m elevation. This species is distinguished by characters of the carapace, the male anterior thoracic sternum, and the form of the male major cheliped and first gonopod. Thelphusa goudoti H. Milne Edwards, 1853, is transferred to Foza Reed & Cumberlidge, 2006, and redescribed, and a key to the three species of this genus is provided. Comments on the rare cave crab Skelosophusa prolixa Ng & Takeda, 1994, from Antsiranana Province are also included based on newly obtained material.
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
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.
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
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
Wägele, Johann Wolfgang; Platvoet, Dirk
Monodanthura is a new genus of the family Anthuridae (Crustacea: Isopoda: Anthuridea) closely related to Notanthura Monod, 1927. The new species M. maroccana proves that Notanthura is not synonymous with Haliophasma Haswell, 1881. ”Cyathura” liouvillei Monod, 1925, is closely related to the new spec
Decápodos (Crustacea utilizados na alimentação de Dasyatis guttata (Bloch & Schneider (Elasmobranchii, Dasyatididae na área de influência da estação ecológica Ilha do Medo, Baía de Rodos os Santos, Bahia, Brasil Decapods (Crustacea utilized in the diet of Dasyatis guttata (Bloch & Schneider (Elasmobranchii, Dasyatididae in the area around the Ecological Station Ilha do Medo, Todos os Santos Bay, Bahia, Brazil
César Roberto Goes Carqueija
Full Text Available The occurence of Decapoda crustaceans in the diet of Dasyatis guttata (Bloch & Schneider, 1801 (Elasmobranchii. Dasyatididae is reported. Inferences are also made about some aspects of the predator - prey relationship in the area around the Ecological Station.
Novo registro altitudinal de Trichodactylus fluviatilis (Latreille, 1828 (Decapoda, Trichodactylidae no Brasil = New altitudinal record of Trichodactylus fluviatilis (Latreille, 1828 (Decapoda, Trichodactylidae in Brazil
Samuel Campos Gomides
Full Text Available Trichodactylus fluviatilis (Latreille, 1828 (Decapoda, Trichodactylidae é uma espécie de caranguejo que habita rios e riachos montanhosos em altitudes até aproximadamente 500 m. Sua distribuição ocorre na América do Sul, desde as bacias costeiras da faixa leste do Brasil até a bacia do alto Paraná e na Argentina. O objetivo do presente trabalho foi registrar a ocorrência de T. fluviatilis em uma Unidade de Conservação de Juiz de Fora, Minas Gerais, e fornecer um novo registro altitudinal dessa espécie noBrasil. As amostras foram obtidas de outubro de 2004 a julho de 2005. Foram coletados três indivíduos vivos, dois machos e uma fêmea da espécie. Também foram analisados 16 regurgitos estomacais do cágado Hydromedusa maximiliani, dos quais, em seis foram encontrados partes corporais deste crustáceo. Muitas espécies de caranguejos do Brasil dafamília Trichodactylidae vivem em regiões acima de 500m do nível do mar. No presente estudo, T. fluviatilis foi coletado a 770 m de altitude, ampliando assim a faixa de distribuição altitudinal dessa espécie no Brasil. Até o presente estudo não existiam relatos de T. fluviatilis no município de Juiz de Fora, portanto este estudo também se constitui em um novo registro desse tricodatilídeo em Minas Gerais. Trichodactylus fluviatilis (Latreille, 1828 (Decapoda, Trichodactylidae is a crab species that lives in mountainous rivers and streams at altitudes up to 500m. Its distribution ranges from South America from the Basins of eastern coast of Brazil to basins of the Upper Paraná River and Argentina. The main objective of this study was to register a new occurrence of T. fluviatilis at a Conservation Unit in Juiz de Fora, Minas Gerais and provide a new altitudinal record for this species in Brazil. The samples were taken between October 2004 and July 2005. We collected three live T. fluviatilis individuals – two males and one female. We also analyzed the stomach contents of 16
Fábio Ricardo da Rosa
Full Text Available Há poucos estudos sobre caranguejos do Pantanal, e estes geralmente enfocam a carcinofauna de rios e lagoas. O Pantanal é a maior planície inundável do mundo, localizado em uma bacia sedimentar na região central da América do Sul, com cerca de 138 km² de área. Há duas estações, de chuva e seca, com o período de inundação começando em janeiro e terminando em abril. Neste trabalho, estudamos a distribuição de caranguejos em habitats temporariamente inundados do Pantanal Mato-Grossense. A área de estudo está localizada entre os rios Cuiabá e São Lourenço, ambos afluentes do Rio Paraguai, localizado no centro-oeste brasileiro. Realizamos coletas diárias no período de cheia do pantanal (22/02 a 03/03 de 2008. Utilizamos 20 parcelas com 25 m² cada para a coleta de dados ambientais e dos animais, mediante cerco com rede de malha 3 mm e captura com rede de arrasto de mesma malha. Removemos a vegetação e a lavamos dentro da parcela para remover animais associados. Diferenciamos os habitats em função das fitofisionomias, da disponibilidade de abrigo para animais, da forma de cobertura vegetal submersa, e da distância do rio. Estudamos o efeito dessas variáveis sobre a abundância de caranguejos associados aos habitats, através de teste de Kruskall-Wallis e regressão linear. Obtivemos densidade média de 0,63 indivíduos/m², predominantemente jovens, e amostramos as três mais abundantes das seis de espécies de Trichodactylidae da região. Houve correlação positiva com formas de cobertura submersa, principalmente gramínea, e negativa com a distância do rio Cuiabá, mostrando que a migração ou dispersão para os alagados diminui com a distância do rio e se concentra em campos nativos ou antropizados. Provavelmente as gramíneas desempenham para os caranguejos, nos alagados, o mesmo papel que as macrófitas aquáticas desempenham em corpos d'água permanentes.There are few papers about crabs in the Pantanal area and that works are mainly with carcinofauna of rivers and lakes. Pantanal is the biggest floodplain of the world, located in a sedimentary basin in the central portion of South America, with around 138 km² of area. There are two season, the rainy and dried, with the flooding period starting in January and finish in April. In this present paper, the distribution of the crabs is studied in temporarily flooded habitats between Cuiabá and São Lourenco Rivers, in the Pantanal of Mato Grosso State, both tributary of the Paraguay River. The collect period was in rainy season, daily between 22/02/08 to 03/03/08. The environmental and animal data were collect using 20 plots with 25 m² each, and a siege net with 3 mm of mesh size and captured crabs with beach seine of the same mesh. The vegetation was removed and washed inside of the plots to extract the associated fauna. The habitats were differentiated according to the phytophisionomy, the availability of animal shelter, the type of the submerse plant structures and the distance of the Cuiabá River. The effect of these variables over abundance of crabs associated to the habitats was verified by Kruskall-Wallis test and by linear regression. The mean density of the crabs was 0,63 individuals/m² and the juvenile stage was predominant. It was sampled three of the most abundant species among the six Trichodactylidae species that occur in the region. The correlation was positive to the availability of submerse plant structures, specially grass cover, and negative to the distance of the river. These results show that migration and dispersion to the flooded areas reduces with the distance of the river and concentrates in native or exotic grasses. Probably for the crabs, the gramineae has same ecological role in the flooded areas as the macrophytes have in the perennial water bodies.
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)
Alexis Castillo; Jorge Valdés
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 Cd
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
Cibele S. Pontes
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.
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
Cláudia Regina Bosa
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.
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
Cibele S. Pontes
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.
Algunos aspectos de la biología de Macrobrachium dux (Lenz, 1910 (Crustacea:Decapoda:Natantia en el río Orogodo, delta del Niger, Nigeria Some aspects of the biology of Macrobrachium dux (Lenz, 1910 (Crustacea:Decapoda:Natantia in river Orogodo delta del niger , Nigeria
Meye Jacob A.
Full Text Available Una investigación preliminar de algunos aspectos de la biología del langostino Macrobrachium dux (Lenz, 1910 fue realizada en el río Orogota en Abavo, sur de Nigeria entre marzo y agosto de 1995. Los langostinos de agua dulce fueron recolectados con trampas y removidos con una canasta de mano. Este estudio reveló que las especies de langostinos se encontraban distribuídas ampliamente y en abundancia en este río. La abundancia en términos de número y biomasa fue mayor en la estación lluviosa con un pico en agosto. Tanto adultos como juveniles mostraron un crecimiento progresivo desde el final de la estación seca hasta la mitad de la estación luuviosa (agosto. La relación machoshembras fue de 1:1,2. La fluctuación entre el número y porcentaje de hembras ovígeras que los langostinos depositan sus huevos durante la mitad de la estación lluviosa. Hembras ovígeras oscilaron entre 4,6 y 7,5 cm y el tamaño de los huevos varió entre 1,5 y 1,7 cm. Los langostinos alcanzaron longitudes y pesos totales de 7,5 cm y 7 g respectivamente. Su patrón de crecimiento fue alométrico. El promedio mensual del factor de condición osciló entre 1,43 y 2,37 y mostró fluctuación mensual con el pico en julio.Preliminary investigation into some aspects of the biology of the palaemonid prawn, Macrobrachium dux (Lenz, 1910 in River Orogodo at Abavo, southern Nigeria was carried out between March and August 1995. The freshwater prawns were collected with properly baited cage traps and scooping with hand basket. The study revealed that the prawn species were widespread and abundant in the river. Abundance in terms of number and biomass was more during the wet season with a peak in August. Both adults and juveniles showed a progressive increase from late dry season to midrainy season (August. The malefemale ratio was 1:1.2. The fluctuation in the number and percentage of ovigerous females indicated that the prawn spawned during the midrainy season (JuneAugust. Ovigerous females ranged from 4.6 to 7.5 cm and egg size varied from 1.5 to 1.7 mm. The prawn attained a maximum total length and weight of 7.5 cm and 7.0 g respectively. Its growth pattern was allometric. The mean monthly condition factor (k ranged from 1.43 to 2.37 and generally showed a monthly fluctuation with a peak in July.
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
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.
Distribuição geográfica potencial de espécies americanas do caranguejo "violinista" (Uca spp. (Crustacea, Decapoda com base em modelagem de nicho ecológico Potential geographical distribution of American species of "fiddler crab" (Uca spp. (Crustacea, Decapoda based on ecological niche model
João Carlos Nabout
Full Text Available Caranguejos do gênero Uca Leach, 1814 (caranguejo "violinista" são um grupo bem conhecido e caracterizado por um acentuado dimorfismo sexual e assimetria da quela do macho. Atualmente, estão descritas 97 espécies no mundo. Objetivou-se estimar a distribuição geográfica potencial de 4 espécies do gênero Uca que ocorrem na costa do continente Americano: Uca maracoani Latreille, 1802-1803, U. uruguayensis Nobili, 1901, U. panacea Novak & Salmon, 1974 e U. monilifera Rathbun, 1914. Para modelar a distribuição dessas espécies nas Américas foram utilizados pontos de ocorrência compilados da literatura. Para a modelagem foram utilizados os programas Maxent e GARP a partir de 10 variáveis climáticas e três variáveis topográficas. Todas as variáveis foram convertidas para uma malha com resolução de 0,0417 graus. Nos dois modelos (Maxent e GARP as espécies apresentaram distribuição geográfica maior do que sugerido por outros trabalhos de registro de ocorrência, com exceção de U. monilifera. Segundo o critério de área sob a curva (AUC, os modelos gerados pelo GARP apresentaram melhores resultados do que os modelos do Maxent. Entretanto, avaliando em conjunto os resultados dos dois modelos é possível melhor estabelecer planos de conservação para espécies com habitat restrito (U. panaceae e U. monilifera, além de recomendar um aumento na amostragem de U. maracoani no nordeste brasileiro e U. uruguyaensis no sudeste brasileiro, a fim de detectar possíveis aumentos na sua distribuição geográfica com base nas predições dos modelos de nicho.The genus Uca Leach, 1814 (fiddler-crabs is a well-know group characterized by a marked sexual dimorphism. Worldwide, there are 97 species of fiddler crabs described. Here, we predicted the potential geographical distribution of four species of this genus (Uca maracoani Latreille, 1802-1803, U. uruguayensis Nobili, 1901, U. panacea Novak & Salmon, 1974 e U. monilifera Rathbun, 1914, which occur in the American continent coast. Data used in the modeling were compiled from occurrence records available in the literature. We used Maxent and GARP programs for modelling, 10 climatic variables and three topographical variables. All variables were converted to a grid resolution of 0.0417 degrees. In both Maxent and GARP models the predicted geographical distribution of the species was larger than suggested by other observed data works, except for U. monilifera. According to the AUC criterion, the models generated by GARP were better than those obtained from Maxent. Evaluating the two models together, it is recommended conservation plans for species with restricted habitat (U. panaceae and U. monilifera besides suggesting sampling of U. maracoani in the Brazilian northeast and U. uruguyaensis in the Brazilian southeast.
Distribuição geográfica potencial de espécies americanas do caranguejo "violinista" (Uca spp.) (Crustacea, Decapoda) com base em modelagem de nicho ecológico Potential geographical distribution of American species of "fiddler crab" (Uca spp.) (Crustacea, Decapoda) based on ecological niche model
João Carlos Nabout; Paulo De Marco Júnior; Luis Maurício Bini; Diniz-Filho, José Alexandre F.
Caranguejos do gênero Uca Leach, 1814 (caranguejo "violinista") são um grupo bem conhecido e caracterizado por um acentuado dimorfismo sexual e assimetria da quela do macho. Atualmente, estão descritas 97 espécies no mundo. Objetivou-se estimar a distribuição geográfica potencial de 4 espécies do gênero Uca que ocorrem na costa do continente Americano: Uca maracoani Latreille, 1802-1803, U. uruguayensis Nobili, 1901, U. panacea Novak & Salmon, 1974 e U. monilifera Rathbun, 1914. Para modelar ...
Porcellanid crabs (Crustacea, Decapoda inhabiting sand reefs built by Phragmatopoma lapidosa (Polychaeta Sabellariidae at Paranapuã beach , São Vicente, SP, Brazil Porcelanídeos (Crustacea, Decapoda associados aos recifes de areia construídos por Phragmatopoma lapidosa (Polychaeta, Sabellariidae na Praia de Paranapuã, São Vicente, SP, Brasil
Full Text Available The purpose of this study is to survey the porcellanid crab fauna inhabiting Phragmatopoma lapidosa sand reefs at Paranapuã Beach, São Vicente (SP, Brazil, and to assess species diversity, density and spatial distribution at this locality. Monthly samples were carried out from September/94 to August/95 in three established sampling sites along the rocky shore. Five species of Porcellanidae were recorded: Pachycheles laevidactylus, P. monilifer, Petrolisthes armatus, Pisidia brasiliensis and Megalobrachium roseum comprising 9,084 specimens. The former four species were recorded in all sampling sites while the latter ocurred only in one. The highest relative density was showed by P. laevidactylus followed by P. armatus. Remaining species were present in much lower densities, disregarding site or sampling month. In general, higher densities were registered during winter. The species, P. laevidactylus, P. monilifer and P. armatus showed an heterogeneous habitat occupation along the shore, probably reflecting different tolerance levels against salinity fluctuations.O objetivo do presente estudo é fazer um levantamento da fauna de porcelanídeos que habitam os recifes de areia de Phragmatopoma lapidosa na Praia de Paranapuã, São Vicente (SP, Brasil, e avaliar a diversidade de espécies, suas densidades e distribuição espacial neste local. Amostras mensais foram realizadas de setembro de 94 a agosto de 95 em três pontos preestabelecidos ao longo do costão rochoso. Foram registradas cinco espécies de Porcellanidae: Pachycheles laevidactylus, P. monilifer, Petrolisthes armatus, Pisidia brasiliensis e Megalobrachium roseum, num total de 9.084 espécimes. As quatro primeiras espécies foram registradas em todos os pontos de coleta, enquanto a última ocorreu em apenas um dos pontos. A espécie P. laevidactylus apresentou a maior densidade relativa, seguida de P. armatus. As demais espécies estavam presentes em densidades muito menores, independentemente do ponto ou mês de coleta. De forma geral, as maiores densidades foram registradas durante os meses de inverno. As espécies P. laevidactylus, P. monilifer e P. armatus apresentaram uma ocupação heterogênea do hábitat ao longo do costão rochoso, refletindo, provavelmente, diferentes níveis de tolerância quanto à variação de salinidade.
Panampunnayil, S.U.; Buju, A.
Order] At: 10:52 24 October 2007 A new genus and species of Heteromysini (Crustacea- Mysidacea) from the backwater of Kochi (Kerala, India) S.U. PANAMPUNNAYIL & A. BIJU National Institute of Oceanography, Regional Centre, Kochi, India (Accepted 3 May... 2007) Abstract Kochimysis pillaii, a new genus and species of Heteromysini collected from the backwater of Kochi, is described. The new genus is closely related to the genus Deltamysis but is distinguishable from the latter by the following characters...
Remerie, T.; Bulckaen, B.; Calderon, J; Deprez, T.; Mees, J.; J. Vanfleteren; Vanreusel, A.; Vierstraete, A; Vincx, M.; Wittmann, K.J.; Wooldridge, T.
Species of the order Mysida (Crustacea, Peracarida) are shrimp-like animals that occur in vast numbers in coastal regions of the world. The order Mysida comprises 1053 species and 165 genera. The present study covers 25 species of the well-defined Mysidae, the most speciose family within the order Mysida. 18S rRNA sequence analysis confirms that the subfamily Siriellinae is monophyletic. On the other hand the subfamily Gastrosaccinae is paraphyletic and the subfamily Mysinae, represented in t...
Van den Broecke, Lynn; Vanfleteren, Jacques; Martens, Koen; SCHON, Isa
Ostracoda or mussel-shrimps are small, bivalved Crustacea. Because of their excellent fossil record and their broad variety of reproductive modes, ostracods are of great interest as a model group in ecological and evolutionary research. Here, we investigated damage and repair from one of the most important biological mutagens, namely UVB radiation, in the putative ancient asexual ostracod Darwinula stevensoni from Belgium. We applied three different methods: the Polymerase Inhibition (PI) ass...
Liu, Qiu-Ning; Chai, Xin-Yue; Jiang, Sen-Hao; Zhou, Chun-Lin; Xuan, Fu-Jun; Tang, Bo-Ping
Here we present the complete mitochondrial (mt) genome of Procambarus clarkii (Decapoda: Cambaridae) and provide its annotation. The complete mt genome was determined to be 15 929 bp and contains 22 tRNA genes, 13 protein-coding genes (PCGs), two rRNA genes, and a D-loop region. The nucleotide composition was biased toward A + T nucleotides (72.91%) and the AT skew of this mt genome was slightly negative. All the 22 tRNA genes displayed a typical clover-leaf structure, with the exception of trnS1 (AGN). About 13 PCGs were initiated by ATN codons, except for cox1 and nad2 genes which were initiated by ACG and GTG, respectively. Six of the 13 PCGs harbor the incomplete termination codon by T or TA. The D-loop region of the mt genome was 1188 bp in length and the A + T content was 81.08%. Phylogenetic analysis showed that the placement of P. clarkii was within the Cambaridae. This mt genome sequence will provide a better understanding for crayfish evolution in the future. PMID:26258501
... and greenhouse operations, as defined in 40 CFR 170.3, which includes seeding, potting and... 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...
Book review of: Vives, F. and A.A. Shmeleva. – 2006. Crustacea, Copépodos marinos I. Calanoida. In: Fauna Ibérica, vol. 29. Ramos et al. (eds.), Museo Nacional de Ciencias Naturales, CSIC, Madrid. 1152 pp. ISBN: 84-00-07010-0 (for Fauna Ibérica); ISBN: 978-84-00-08515-5 (for volume 29). In Spanish.-- 2 pages
Secondina DI GIUSEPPE; Giovanni FANCELLO; Graziella MURA
To investigate the relationship between the adaptive strategies of Chirocephalus diaphanus (Crustacea, Anostraca) and the environmental characteristics of its habitat, we studied two populations living in high-altitude biotopes with very different characteristics, i.e. a semipermanent pool (Tilia Lake) and a temporary one (Illica Plain Pool), and we examined the essential features of their biological cycles (growth rate, reproductive biology, sex ratio and life cycle). The results show that t...
Poinar, George; Duarte, Daniella; Santos, Maria João
Halomonhystera parasitica n. sp. (Monhysterida: Monhysteridae) is described from the body-cavity and under the dorsal plates of the sandy beach amphipod Talorchestia brito Stebbing (Crustacea: Talitridae) in Portugal. The new species differs from previously described members of the genus by a combination of the following characters: four medium-sized cephalic setae; base of stoma with three blunt denticles; posterior dilated portion of stoma absent; amphids small, with width less than quarter of corresponding body width; amphids located less than two labial widths from anterior extremity; uterine eggs elliptical and unembryonated; gubernaculum lacks caudal process; and male tail with two separated pairs of postcloacal papillae and a single subterminal seta-like papilla. This is the first representative of the family Monhysteridae parasitic in the body-cavity of crustaceans. Approximately 48% of the amphipods examined contained various stages of H. parasitica. PMID:20012518
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.
A study of the metabolism of metals was carried out in decapod crustaceas; it showed that it was subject to cyclic variations during the life of the animals, closely correlated with growth moults. The metabolism of metals was also considered in its relations with reproduction, especially oogenesis and spermatogenesis, and embryonic development. In relation with moult, various factors playing a role on metal metabolism were investigated: role of metals in the organism, fasting and nutrition cycles and biochemical reserves, physico-chemical form of the metal and ultrastructure of uptake surfaces. The histological and histochemical aspects of the uptake of a number of metals were studied as well as inter-metallic and inter-organic relationships
Full Text Available The green tiger prawn, Penaeus semisulcatus is one of the most important members of the family Penaeidae in the Persian Gulf. Based on the morphological characteristics, two groups, including P. semisulcatus and its subspecies viz. P. s. persicus are recognized. This study was conducted to investigate the genetic distance between P. semisulcatus and P. s. persicus by analyzing partial sequence of 5.8S rRNA. Another objective of this study is to evaluate the ability of 5.8S rRNA to identify the species of Decapoda. The results indicated that the 5.8S rRNA gene of both P. semisulcatus and P. s. persicus were exactly identical, and sequence variation was not observed. The results also indicated that 5.8S rRNA sequences between species of the same genus of analysed species of Decapoda are conserved, and no genetic distance was observed in species level. The low evolutionary rate and efficient conservation of the 5.8S rRNA can be attributed to its role in the translation process.
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
Ralf Schwamborn; Mauro de Meló Júnior; Sigrid Neumann Leitão; Werner Ekau; Maryse Nogueira Paranaguá
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 larva...
Une campagne du N.O. "METEOR", faite en 1987, a permis la récolte de 21 espèces de crevettes pénéides dans le golfe d'Aden et de cinq en mer Rouge. Sur les 21 espèces du Golfe d'Aden, 13 y avaient déjà été signalées, deux étaient considérées comme endémiques de la mer Rouge, quatre autres étaient connues de l'Océan Indien et une de l'Ouest-Pacifique; enfin une espèce, #Hymenopenaeus tuerkayi$, est nouvelle. Une autre espèce nouvelle, #Sicyonia parafallax$, a été capturée en mer Rouge, à l'ent...
On a New Species of Parasitic Barnacle (Crustacea: Rhizocephala), Sacculina shiinoi sp. nov., Parasitizing Japanese Mud Shrimps Upogebia spp. (Decapoda: Thalassinidea: Upogebiidae), Including a Description of a Novel Morphological Structure in the Rhizocephala.
Lützen, Jørgen; Itani, Gyo; Jespersen, Åse; Hong, Jae-Sang; Rees, David; Glenner, Henrik
The rhizocephalan Sacculina shiinoi sp. nov. parasitizes three species of Upogebia in Japan. It is described morphologically and compared with another Upogebia parasite, Sacculina upogebiae Shiino, 1943 from Japan and Korea. These two species are the only sacculinids that parasitize mud shrimps. DNA analyses clearly show the two species to be separate and not closely related. The cuticle differs in being provided with close-set, branched, and spiny excrescences in S. shiinoi, while it lacks excrescences, but forms small scales in S. upogebiae. In S. upogebiae, the bulbous sperm-producing part and the narrow receptacle duct are separated by a compartmentalized mid portion, which is missing in S. shiinoi. A ridge, having a thickened, fluffy cuticle with a U-shaped course, passes across the visceral mass between the two receptacle openings in S. shiinoi. Such a structure has never been described in other rhizocephalans, and its function is uncertain. PMID:27032686
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
Albertoni Edélti Faria
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.
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
Albertoni Edélti Faria; Palma-Silva Cleber; Esteves Francisco de Assis
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, ...
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
Bibiana K. Dutra
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.
Análise comparativa entre a fecundidade de Dilocarcinus pagei Stimpson e Sylviocarcinus australis Magalhães & Turkay (Crustacea, Decapoda, Trichodactylidae) no Pantanal do Rio Paraguai, Porto Murtinho, Mato Grosso do Sul Comparative analysis of fecundity between Dilocarcinus pagei Stimpson and Sylviocarcinus australis Magalhães & Turkay (Crustacea, Decapoda, Trichodactylidae) in the Pantanal region of Paraguay River, Porto Murtinho, Mato Grosso do Sul
Cynthia de Barros Mansur; Nilton José Hebling
The aim of this study was to estimate the fecundity of Dilocarcinus pagei Stimpson, 1861 and Sylviocarcinus australis Magalhães & Turkay, 1996, collected in the Paraguay River, Porto Murtinho County, State of Mato Grosso do Sul, Brazil, between coordinates 21º42,000'S 57º33,649'W and 21º41,449'S 57º33,770'W, in the period of April 1999 to March 2000. After general collection procedures, the specimens were measured and processed in laboratory conditions. The river water crab species hatch like...
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
Edélti Faria Albertoni; Cleber Palma-Silva; Francisco de Assis Esteves
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, ...
Análise comparativa entre a fecundidade de Dilocarcinus pagei Stimpson e Sylviocarcinus australis Magalhães & Turkay (Crustacea, Decapoda, Trichodactylidae no Pantanal do Rio Paraguai, Porto Murtinho, Mato Grosso do Sul Comparative analysis of fecundity between Dilocarcinus pagei Stimpson and Sylviocarcinus australis Magalhães & Turkay (Crustacea, Decapoda, Trichodactylidae in the Pantanal region of Paraguay River, Porto Murtinho, Mato Grosso do Sul
Cynthia de Barros Mansur
Full Text Available The aim of this study was to estimate the fecundity of Dilocarcinus pagei Stimpson, 1861 and Sylviocarcinus australis Magalhães & Turkay, 1996, collected in the Paraguay River, Porto Murtinho County, State of Mato Grosso do Sul, Brazil, between coordinates 21º42,000'S 57º33,649'W and 21º41,449'S 57º33,770'W, in the period of April 1999 to March 2000. After general collection procedures, the specimens were measured and processed in laboratory conditions. The river water crab species hatch like juveniles and, frequently, female specimens were observed carrying eggs in different stages of development, besides juveniles and eggs at the same time. It was apparent in the frequency distributions that D. pagei has a carapace width average greater than S. australis. The number of eggs and juveniles transported varied amongst species and amongst size class. A size superposition was observed between young and adult females for both species. According to the calculated fecundity index, D. pagei presented slightly more elevated values (7.41 than S. australis (6.65. Eggs are spherical and are not adhering to pleopods. Egg size did not varied during development, continuing with 2mm diameters.
Hendrickx, Michel E.; Mary K. Wicksten
Diez especies de Pandalidae (Crustacea: Caridea) se encuentran en las aguas del Pacífico mexicano, de las cuales dos (Plesionika trispinus y Stylopandalus richardi) se colectaron por primera vez en México. Se presenta la información actualizada acerca de la distribución geográfica y batimétrica de las especies, así como una clave de identificación de estas. La fauna de camarones Pandalidae del Pacífico mexicano es pobre, ya que representa menos del 10% de las especies conocidas. Ocho de las ...
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
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.
Viabilidade do cultivo do camarão-rosa Farfantepenaeus paulensis (Crustácea, Decapoda em gaiolas sob diferentes densidades durante o outono no sul do Brasil Viability of culturing the shrimp Farfantepenaeus paulensis (Crustacea, Decapoda in cages under different stocking densities during autumn in southern Brazil
Full Text Available Neste trabalho, foi estudada a possibilidade de cultivar o camarão-rosa Farfantepenaeus paulensis em gaiolas com diferentes densidades de estocagem durante o outono (abril a junho no estuário da Lagoa dos Patos, RS. Juvenis com peso médio de 4,95g (± 1,69 dp foram estocados em gaiolas nas densidades de 20, 40, 80, 100 e 120 ind/m². Os camarões foram alimentados diariamente ad libitum com pedaços de Corvina (Micropogonias furnieri. As sobrevivências e os pesos foram observados nos tempos 20, 40 e 60 dias de experimento. Durante o período de cultivo a temperatura da água decresceu de 24 para 11°C (média = 17,1°C e a salinidade oscilou entre 3 e 26 (média = 17,5. As taxas de sobrevivência nas densidades de 20, 40, 80, 100 e 120 ind/m² foram 65%, 68%, 46%, 52% e 43,3% respectivamente, sendo significativamente maiores nas densidades de 20 e 40 ind/m². Após 60 dias, os camarões estocados em 20 e 40 ind/m² atingiram peso superior a 8,0g, sendo significativamente maiores (PIn this study, we assessed the feasibility of culturing Farfantepenaeus paulensis in cages at different stocking densities during autumn (from April to June in the Patos Lagoon estuary. Juveniles with mean weight of 4.95g (± 1.69 SD were stocked in cages at densities of 20, 40, 80, 100 and 120 ind/m² of bottom. Shrimp were fed daily by-catch items (Micropogonias furnieri ad libitum. Survival and wet weight were estimated at 20, 40 and 60 days after the beginning of the trial. Water temperature varied from 11 to 24°C (mean = 17.1°C, whiles salinity ranged from 3 to 26 (mean = 17.5. Survival rates at densities of 20, 40, 80, 100 and 120 ind/m² were 65%, 68%, 46%, 52% and 43,3%, respectively, being significantly higher at 20 and 40 ind/m². After 60 days, shrimp stocked at 20 and 40 ind/m² reached over 8.0g, which were significantly higher than those reared at 80, 100 and 120ind/m². The highest biomass (356g/m² was obtained at 120 shrimp per m². Up to 250 to 350 g of shrimp with mean weight of 6.5 to 8.0g were produced per m² even at the highest stocking densities (40 to 120 ind/m². Survival rates of shrimp reared at 20 and 40 ind/m² may be considered satisfactory, whereas growth rates where negligible after temperature dropped below 18°C. The present results confirmed the negative effect of stocking density on shrimp growth, being recommended the stocking of at the most 40 to 120 ind/m². Although the feasibility of culturing F. paulensis in cages during autumn in southern Brazil was demonstrated.
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
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.
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.)
MacIsaac, K. G.; Kenchington, T. J.; Kenchington, E. L. R.; Best, M.
We describe the trawl-vulnerable crustacean micronekton and macrozooplankton of the Gully, a large, shelf-incising submarine canyon off Nova Scotia, Canada, and a Marine Protected Area. Over 68 species of pelagic crustacea were collected with an International Young Gadoid Pelagic Trawl during three annual summer surveys at one fixed station in the canyon. Depths sampled ranged from the surface to the upper bathypelagic zone, concentrated in the upper 1250 m, with a maximum depth of 1500 m. The crustacean fauna was dominated by cold temperate species typical of mid- to higher-latitudes in the North Atlantic. Meganyctiphanes norvegica and Eusergestes arcticus were particularly dominant in terms of both observed biomass and abundance above 750 m depth. At least 17 species were new records for Canadian waters. The species assemblage of the station varied primarily with depth and diel cycle, the only dominant members of the assemblage showing pronounced inter-annual variations in catch being M. norvegica and Themisto gaudichaudii, both relatively shallow living species.
Manti, Anita; Canonico, Barbara; Mazzeo, Roberto; Santolini, Riccardo; Ciandrini, Eleonora; Sisti, Davide; Rocchi, Marco Bruno Luigi; Nannoni, Francesco; Protano, Giuseppe; Papa, Stefano
The major environmental impact of landfills is emission of pollutants via the leachate and gas pathways. The hepatopancreas of the terrestrial isopod Armadillidium vulgare (Isopoda, Crustacea, Latreille 1804) plays an important role in the bioaccumulation of contaminants, such as heavy metals. To evaluate the effects of landfill leachate treatment, 2 different approaches were applied: 1) the detection of accumulation of trace elements (As, Cd, Cr, Cu, Sb, Zn, Pb, Ni, V) in hepatopancreatic cells, and 2) the evaluation of biological effect of contaminants on fresh hepatopancreatic cells by flow-cytometric analyses. The presence of 2 different cell types (herein referred to as "small" [S] cells and "big" [B] cells, in agreement with the literature based on morphological examinations) was detected for the first time by flow cytometry, which also highlighted their different response to stress stimuli. In particular, B cells appeared more sensitive to landfill leachate treatment, being more damaged in the short term, while S cells seemed more adaptive. Furthermore, S cells could represent a pool from which they are able to differentiate into B cells. These findings were also confirmed by principal component analyses, underlining that S SYBR Green I bright cells correlate with specific chemicals (Ca, Cu, Co), confirming their resistance to stress stimuli, and suggesting that the decrease of specific cell types may prime other elements to replace them in a homeostasis-preservation framework. PMID:23929682
Speiser, Daniel I; Lampe, Rebecca I; Lovdahl, Valerie R; Carrillo-Zazueta, Brenna; Rivera, Ajna S; Oakley, Todd H
Sexual dimorphisms have long drawn the attention of evolutionary biologists. However, we still have much to learn about the evolutionary, genetic, and developmental drivers of sexual dimorphisms. Here, we introduce ostracods of the genus Euphilomedes (Myodocopida, Ostracoda, and Crustacea) as a promising new system in which to investigate why and how sexual dimorphisms evolve. First, we ask whether male-skewed selective pressure from pelagic predators may help explain a dramatic sexual dimorphism in which male Euphilomedes have compound eyes, but females do not. Manipulative experiments demonstrate that blindfolding reduces the survival rate of male Euphilomedes when they are exposed to predatory fish. Blindfolding of the female rudimentary eyes (rudiments) does not, however, similarly influence the survival rate of brooding females. Further, numerical estimates of sighting distances, based on reasonable extrapolations from Euphilomedes's eye morphology, suggest that the eyes of male Euphilomedes are useful for detecting objects roughly the size of certain pelagic predators, but not conspecifics. We conclude that eyes do not mediate direct interactions between male and female Euphilomedes, but that differences in predation pressure-perhaps associated with different reproductive behaviors-contribute to maintaining the sexually dimorphic eyes of these ostracods. Second, through transcriptome sequencing, we examined potential gene regulatory networks that could underlie sexual dimorphism in Euphilomedes' eyes. From the transcriptome of juvenile male Euphilomedes' eyes, we identified phototransduction genes and components of eye-related developmental networks that are well characterized in Drosophila and other species. The presence of suites of eye regulatory genes in our Euphilomedes juvenile male transcriptome will allow us, in future studies, to test how ostracods regulate the development of their sexually dimorphic eyes. PMID:23652199
Airton Santo Tararam
Full Text Available The feeding of Hyale media was analysed under laboratory conditions in winter and summer temperatures. The results showed that assimilation rates increased following food ingestion rates and decreased when egestion rates increased. In winter temperatures no significant differences were found in the assimilation rates among developmental stages and sexes. In summer temperatures assimilation rates for ovigerous and non-ovigerous females were higher than those found for adult and young males. Although not statistically analysed, mean assimilation efficiencies were highest among ovigerous females and adult males, in summer. The quantitative and qualitative variations found in the assimilation efficiency and rates were explained by the differential effect of temperature on the specific growth rate and in the physiological conditions of each growth stage concerned.No presente estudo foram analisados em laboratório, sob temperaturas de inverno e verão, aspectos quantitativos da alimentação de Hyale media (Crustacea-Amphipoda, utilizando-se o método gravimetría, aliado ao conteúdo de carbono dos itens alimentares oferecidos. Nos experimentos com temperatura de inverno não foi encontrado diferença significativa nas taxas de assimilação entre os diferentes estádios de desenvolvimento e sexo. Naqueles com temperatura de verão as taxas de assimilação para fêmeas ovígera e não ovígera foram maiores que aquelas encontradas para machos adulto e jovem. As variações encontradas nas taxa e eficiência de assimilação foram explicadas pelo efeito diferencial da temperatura sobre a taxa de crescimento específico e condições fisiológicas de cada estádio de desenvolvimento.
A. Y. Varigin
Full Text Available The degree of phenotypic plasticity in the Idotea baltica basteri Audouin, 1827 (Crustacea, Isopoda sex ratio of the fouling community in the Odessa bay of the Black Sea was determined. The ratio of males and females in three main phenotypes of I. baltica basteri, namely: uniformis, albafusca and lineata was found. Crustaceans were collected on the underwater surface of traverses, located in three sea districts with the different degrees of water exchange intensity with the open sea. Water depth at the wall of traverses ranged from 1 to2,5 m. In the first most opened district among the individuals of uniformis phenotype the ratio of males and females was equal to 1:4, that for albafusca – 1:1,3 and lineata – 1:1. In the second area with the release of drainage waters among the individuals of uniformis phenotype this ratio was equal to 1:4,5, while the albafusca and lineata figures were 1:1,5 and 1:1, accordingly. In the third region, with the most difficult water exchange, among the individuals of phenotypes the ratios of males and females were as follows: uniformis – 1:8, albafusca – 1:2, and lineata – 1:1. When moving from the opened to semi-enclosed area among the individuals of all phenotypes there was a gradual decline in the proportion of males and accordingly, increases of the proportion of females. The greatest number of males in all areas under study is observed among the individuals of lineata phenotype, and that of females – among the individuals of uniformis phenotype. It is found that monochromatic colored females prefer to stay in the shaded places among the seagrass beds and brightly colored males usually move actively along the outside of the substrata.
Shrivastava, Y.; Mahambre, G.G.; Achuthankutty, C.T.; Fernandes, Brenda; Goswami, S.C.; Madhupratap, M.
been reported to occur suddenly after a series of parthenogenetic gener- ations (Zhong et al. 1989). In the present study also, three sexual males were encountered during the later part of the study while being mass reared. Studies have been initiated... the life span of females. However, long-term feeding experiments revealed that the percentage survival was high with I. galbana and low with C. cal- citrans. Introduction Diaphanosoma celebensis (Crustacea:Cladocera:Sididae) is a low to medium saline...
Ghekiere, A.; Verslycke, T.; Fockedey, N.; Janssen, C.R.
Ecdysteroids, the molting hormones in crustaceans and other arthropods, play a crucial role in the control of growth, reproduction and embryogenesis of these organisms. Insecticides are often designed to target specific endocrine-regulated functions such as molting and larval development such as methoprene, a juvenile hormone analogue.The aim of this study was to examine the effects of methoprene on molting in a non-target species, the estuarine mysid Neomysis integer (Crustacea: Mysidacea). ...