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| Gregati,Rafael Augusto; Negreiros-Fransozo,Maria Lucia. |
| The relative growth and morphological sexual maturity of Chasmagnathus granulatus Dana, 1851 are presented for the first time to a mangrove population. The crabs were obtained during low tide periods, in the mangrove of Jabaquara Beach, Paraty, Rio de Janeiro, Brazil. All crabs in intermolt stage were sexed and had their body parts measured as follows: body height (BH), carapace length (CL) and width (CW), major cheliped propodus height (PH) and length (PL) for each sex, gonopod length (GL) and abdomen width (AW) for males and females, respectively. The relative growth was described using the allometric equation y=ax b and the size at onset sexual maturity was achieved using the software Mature I. The size of specimens ranged from 4.1 mm to 39.5 mm CW. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Grapsoidea; Semiterrestrial crabs; Morphometric relationships; Allometric growth. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212007000300009 |
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| Arai, Tammy Iwasa; Brandao Costa, Manoela; Freire, Andrea Santarosa. |
| The sally lightfoot crab, Grapsus grapsus (Linnaeus, 1758), has been recorded from the oceanic islands off Brazil, as well as from the Caribbean, in coastal rocky shores in the Eastern Pacific, and in Galapagos. We report the first observation of G. grapsus in freshwater habitat, registered in a stream at Trindade Island, Brazil. |
| Tipo: Text |
Palavras-chave: Trindade Island; Grapsoidea; Salinity; Inland; South Atlantic Ocean. |
| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00597/70913/69148.pdf |
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| Gregati,Rafael A.; Negreiros-Fransozo,Maria L.. |
| The population biology of the burrowing crab Neohelice granulata (Dana, 1851) from a mangrove in Jabaquara Beach, Paraty, state of Rio de Janeiro, Brazil (23º13'04"S and 44º42'47"W), was studied with respect to the following traits: size-frequency distribution, recruitment, reproductive period, fecundity, and sex ratio. Specimens were sampled monthly from April, 2003 to March, 2004, at the river margins during low tide periods. Size, sex, presence of eggs, and stage of the female gonad were recorded. Ovigerous females had their eggs removed and counted. The reproductive period was continuous and the highest frequency of ovigerous females was recorded in the fall and winter. Mature gonads were found throughout the year and recruitment was continuous but... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Grapsoidea; Population structure; Semiterrestrial crab. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702009000100006 |
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| Lima,Giovana V.; Oshiro,Lídia M. Y.. |
| 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... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ecossistemas; Desenvolvimento gonadal; Grapsoidea; Habitats; Morfotipos. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752006000400014 |
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| Leme,Maria H. de A.. |
| 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... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Allometric analysis; Gonadal maturity; Grapsoidea; Mangrove crab. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752005000200020 |
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