INVESTIGADORES
RODRIGUEZ Enrique Marcelo
artículos
Título:
Annual reproduction and growth of adult crabs Chasmagnathus granulata (Brachyura, Grapsidae)
Autor/es:
LÓPEZ GRECO, L.S.; RODRÍGUEZ, ENRIQUE M.
Revista:
CAHIERS DE BIOLOGIE MARINE
Editorial:
CAHIERS DE BIOLOGIE MARINE
Referencias:
Año: 1999 vol. 40 p. 155 - 164
ISSN:
0007-9723
Resumen:
Somatic growth and gonadal maturation of Chasmagnahtus granulata (Grapsidae, Sesarminae) were studied thorughout one year. Spawning and moulting were recorded under controlled conditions, while gonadosomatic (GI) and hepatosomatic (HI) indexes were estimated from crabs monthly sampled at field (Samborombón Bay, Argentina). Adult females may have at the most four broods during the reproductive season (Septembre to March, i.e. Spring-Summer), with one month of incubation period. Brooding and larval eclosion are correlated with lunar cycle, a fact which favour the larval dispersion to the sea. Females can moult during the reproductive period, with a higher percentage than males. The highest percentage of moulting was observed for both sexes after the reproductive season during April and May (autumn). The seasonal change of the gonadosomatic index indicates the gonads begin to develop in winter (June to August) after the moulting period.