Gonadal Development and Fecundity of Swimming Crab Portunus segnis (Forskal, 1775) in Coastal Waters of Balochistan, Pakistan
Gonadal Development and Fecundity of Swimming Crab Portunus segnis (Forskal, 1775) in Coastal Waters of Balochistan, Pakistan
Shazia Rasheed1,*, Ehsan Ullah Mengal1, Robina Manzoor2 and Azra Bano1
ABSTRACT
This paper deals with a study of sexual maturity by gonadal development, fecundity and gonado-somatic uidex (GSI) of Portunus segnis from Balochistan, Pakistan. The size at sexual maturity attained by the study of gonads, showed that the smallest mature male had 76 mm short carapace width (SCW) in size and the largest male immature crab had 90 mm SCW. In case of female smallest mature crab had 70 mm SCW, while the largest immature crab had 92 mm SCW. The minimum number of eggs estimated in the female P. segnis was 86,392 while maximum number of eggs was found to be 1,555,820 in a crab of 138 mm SCW. The average fecundity was 523,773 ± 279,204. The GSI values of male crab ranged from 0.70 to 6.20 having a mean of 3.80 ± 1.08 (Mean ± SD). In case of female, GSI values of samples ranged from 0.71 to 13.33% having a mean of 5.46 ± 3.25 (Mean ± SD).
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