SIZE DIMORPHISM OF CALLINECTES AMNICOLA DE ROCHEBRUNE,1881 (DECAPODA, PORTUNIDAE) IN THE IVORIAN LAGOONS.
Size dimorphism is a common phenomenon in crabs species. This study was undertaken to investigate size dimorphism of populations of Callinectes amnicola in the Ivorian Lagoons. Data on eleven morphological characters; body weight, carapace width, carapace length, right and left propodus length, rigth and left merus length, right and left carp length and rigth and left dactylus length, were taken from 585 specimens comprising 314 males and 271 females. In both 585 specimens, heterochely showed that 51.12 percent had long claw to left and 48.88 percent had to rigth. Concerning size dimorphism index, in six localities, we found that four populations had males who weighter than females. However, we remarked that degre dimorphism (SD) is low between males and females for chelipeds length (1% to 11%). The cases of homochely were found for four characters.
Size dimorphism, Degre dimorphism, Heterochely, Callinectes amnicola,Morphological.