Relative growth and morphological sexual maturity of the freshwater crab Trichodactylus fluviatilis Latreille 1828 (Decapoda, Trichodactylidae) from west central Sao Paulo State, Brazil
Nenhuma Miniatura disponível
Data
2014-04-03
Autores
Pescinelli, Regis Augusto [UNESP]
Farinelli Pantaleao, Joao Alberto [UNESP]
Davanso, Thiago Maia [UNESP]
Costa, Rogério Caetano da [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Taylor & Francis Ltd
Resumo
An analysis of relative growth was performed to determine the size at morphological sexual maturity of Trichodactylus fluviatilis Latreille 1828. Samples were collected by trapping at night from January 2010 through June 2011 from the Barreiro River (22 degrees 34 ' 42 '' S; 49 degrees 11 ' 92 '' W), west central Sao Paulo State, Brazil. The following measurements were obtained (mm): carapace width (CW) (independent variable), cheliped propodus length (PL), cheliped propodus height (PH), cheliped propodus width (PW), first pleopod length, and abdomen width (AW). The males showed positive allometry in the juvenile and adult stages for the following relationships: PL vs. CW, PH vs. CW, and PW vs. CW. In the females, a positive allometry was observed for AW vs. CW in the juvenile stage, and a negative allometry was observed for this relationship in the adult stage. The differential growth of the chelipeds in males could be related to territorial conflict and courtship, whereas the changes in the growth of the female abdomen most likely favor higher reproductive success.
Descrição
Palavras-chave
allometry, reproduction, Brachyura
Como citar
Invertebrate Reproduction & Development. Abingdon: Taylor & Francis Ltd, v. 58, n. 2, p. 108-114, 2014.