Fecundity in Portunus spinimanus Latreille, 1819 (Crustacea, Brachyura, Portunidae) from Ubatuba, São Paulo, Brazil.
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Data
1997-09-01
Autores
Santos, S.
Fransozo, MLN
Título da Revista
ISSN da Revista
Título de Volume
Editor
Interciencia
Resumo
The object of this work was to study the conditions of embryo development and egg production in Portunus spinimanus Latreille, 1819 at Ubatuba region of Brazil. The number of eggs laid by 21 females in a range of size was determined. Eggs at 3 differ ent stages of embryonic development were measured P. spinimanus fecundity varied between 188,065 and 682,992, with an average of 429,676 +/- 157,203, for animals with a carapace width ranging from 56.2 to 86.6 mm. Between the initial and final stages of development there was an increase of 55.1% in egg diameter. The relatively high fecundity of P. spinimanus may be a strategy of the species faced with a high mortality rate in the larval phase; however this hypothesis should be tested.
Descrição
Palavras-chave
Crustacea, swimming crab, Portunus, eggs, fecundity, size at maturity, reproductive effort, Ubatuba, São Paulo, Brazil
Como citar
Interciencia. Caracas: Interciencia, v. 22, n. 5, p. 259-263, 1997.