Reproductive performance in Cyrtograpsus angulatus and Cyrtograpsus altimanus (Brachyura, Varunidae) from Jabalí Island, Argentina

LÓPEZ GRECO, L.S.; RODRÍGUEZ, E.M.

JOURNAL OF CRUSTACEAN BIOLOGY

CRUSTACEAN SOC

Año: 2004 vol. 24 p. 213 - 216

0278-0372

The reproductive performance of two Varunidae crabs, Cyrtograpsus angulatus and C. altimanus from jabalí Island (40º32´S, 62º15´W), Argentina, were compared. The following reproductive variables were measured in the laboratorory for fixed females of each species: realized fecundity (number of eggs(female); EW: egg dry weight (egge dry weight/number of eggs). RO: reproductive output (egg dry weight/female dry weight); RF: relative fecundity (number of eggs by female/female dry weight: and RSOM (relative size at the onset of maturity). Cyrtograpsus angulatus showed a greater realized fecundity than C. altimnaus, in accordance with the greater size of the former (20.88 ± 0.66 mm and 8.52 ± 0.12 mm carapace widths, respectively. The EW, RO, and RF presented similar values for both species, whereas C. altimanus had a greater RSOM than C. angulatus.