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| Ayres-Peres,Luciane; Mantelatto,Fernando L.. |
| A estrutura populacional do ermitão Loxopagurus loxochelis (Moreira, 1901) foi analisada por meio da distribuição de freqüência dos animais em classes de tamanho e da razão sexual. Espécimes foram coletados mensalmente no período de um ano (julho de 2002 a junho de 2003), em sete transectos (5 aos 35 m de profundidade), usando barco equipado com duas redes do tipo double-rig, nas enseadas de Caraguatatuba e de Ubatuba (Estado de São Paulo, Brasil). Em Caraguatatuba foram coletados 366 animais, sendo 222 machos (60,65%), 114 fêmeas não-ovígeras (31,15%) e 30 fêmeas ovígeras (8,20%) e, em Ubatuba, 126 ermitões, dos quais 81 machos (64,28%), 38 fêmeas não-ovígeras (30,16%) e sete fêmeas ovígeras (5,56%). Em Caraguatatuba, a alta incidência de fêmeas ovígeras... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Crustacea; Diogenidae; População; Reprodução; Razão sexual. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212008000100004 |
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| Ayres-Peres,Luciane; Mantelatto,Fernando L.. |
| Gastropod shells occupied by hermit crabs are an important attachment substrate for epifauna, and these shells are often damaged. The present study aimed to characterize the epibionts and extent of damage for gastropod shells occupied by the hermit crab Loxopagurus loxochelis (Moreira, 1901). Samples were collected monthly over a period of one year (from July 2002 through June 2003), in the Caraguatatuba and Ubatuba regions, on the northern coast of São Paulo, Brazil. The sampling was performed using a fishing boat equipped with double-rig nets. The shells were identified and weighed. Loxopagurus loxochelis occupied 14 gastropod shell species in Caraguatatuba and five in Ubatuba. In the two areas, approximately 55% of these gastropod shells bore epibionts,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Crustacea; Decapoda; Exobiont; Incrustation. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000200010 |
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| Wehrtmann,Ingo S.; Magalhães,Célio; Hernáez,Patricio; Mantelatto,Fernando L.. |
| Freshwater crabs are an important component of the fauna of limnic environments, and out of the two true freshwater crab families present in the Neotropics, Pseudothelphusidae is the most diverse. Considering the lack of information regarding reproductive features of neotropical freshwater crabs, we studied, for the first time, the fecundity and the presence of juveniles carried by females of two pseudothelphusids from the Amazon region - Kingsleya latifrons (Randall, 1840) and Kingsleya ytupora Magalhães, 1986 - and one from Central America - Potamocarcinus magnus (Rathbun, 1896). The two Kingsleya species produced relatively few (56-114) and large eggs (1.9-3.7 mm), typical for species with an abbreviated or direct development. Recently produced eggs... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brazil; Costa Rica; Freshwater crabs; Direct development; Fecundity; Parental care. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000600019 |
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| Mantelatto,Fernando L.; Faria,Fabíola C. R.; Iossi,Carmen L.; Biagi,Renata. |
| The population of the hermit crab Pagurus criniticornis (Dana, 1852) was studied based on seasonal abundance, size frequency distribution, sex ratio, reproductive period, fecundity and shell relationship. Specimens were collected monthly by SCUBA diving in the infralittoral area of Anchieta Island, Ubatuba. A total of 1,017 individuals was analyzed. Animal size (minimum and maximum shield length, respectively) was 0.7 and 2.9 mm for males, 0.6 and 2.8 mm for non-ovigerous females, and 1.0 and 2.5 mm for ovigerous females. The sex ratio was 1:1.29. Sexual dimorphism was recorded by the presence of males in the largest size classes. Ovigerous females were captured during all months along the year, with percentages varying from 8% (July) to 84.3% (February)... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Crustacea; Hermit crab; Populational biology; Fecundity. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212007000300016 |
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| Pileggi,Leonardo G.; Mantelatto,Fernando L.. |
| The freshwater prawns of the genus Macrobrachium Spence Bate, 1868 are widely distributed in rivers of tropical and subtropical regions and represent an interesting group with controversial taxonomy. The morphological characters traditionally used to separate species have shown a high intraspecific variation. Doubts about the status of M. birai Lobão, Melo & Fernandes, 1986, M. holthuisi Genofre & Lobão, 1978 and M. petronioi Melo, Lobão & Fernandes, 1986 have been arisen due to the high resemblance of the former two species with M. olfersi (Wiegmann, 1836), and the latter one with M. potiuna (Müller, 1880). Therefore, we performed a detailed morphological analysis of these species, including new characters not usually used in the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Caridean shrimps; Crustacea; Freshwater prawns; Neotropical region; Synonymy. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212012000400009 |
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