IMIS | Flanders Marine Institute
 

Flanders Marine Institute

Platform for marine research

IMIS

Publications | Institutes | Persons | Datasets | Projects | Maps
[ report an error in this record ]basket (0): add | show Printer-friendly version

A complex sexual cycle in sandy beaches: the reproductive strategy of Emerita brasiliensis (Decapoda: Anomura)
Delgado, E.; Defeo, O. (2006). A complex sexual cycle in sandy beaches: the reproductive strategy of Emerita brasiliensis (Decapoda: Anomura). J. Mar. Biol. Ass. U.K. 86(2): 361-368. dx.doi.org/10.1017/S002531540601321X
In: Journal of the Marine Biological Association of the United Kingdom. Cambridge University Press/Marine Biological Association of the United Kingdom: Cambridge. ISSN 0025-3154, more
Peer reviewed article  

Available in  Authors 

Keyword
    Marine

Authors  Top 
  • Delgado, E.
  • Defeo, O.

Abstract
    Reproductive tactics displayed by the mole crab Emerita brasiliensis that inhabits Atlantic beaches of South America are reported. The analysis of external sexual characters and reproductive organs disclosed seven developmental forms: megalopae, neotenic males, early females, juveniles, males, females (ovigerous or not) and intersex individuals. Precocious acquisition of gonopores in females, production of spermatophores in neotenic males and presence of juveniles and intersex individuals are reported for the first time for this species. Sex ratios were biased towards male forms in summer, whereas the opposite trend was observed in autumn. The occurrence of different forms within a single population, coupled with a marked temporal variability in its abundance, suggest a high complexity in the sexual life cycle of the mole crab. This involves two different pathways: (a) short, where megalopae moult into neotenic (mature) males or early females; and (b) long, following a sequence of moults involving several stages (zoeas, megalopae, juveniles and adults).

All data in IMIS is subject to the VLIZ privacy policy Top | Authors