Stock assessment of Otolithes ruber, Parastromateus niger and Arius dussumieri in the Sistan and Balouchestan Coastal waters

Abstract

This study was conducted APR 1995-JUL 1996 in Coastal waters. Biometry works (Length/Weight measurement) were done in major landing sites Beris, Gwater, Ramin. Chabahar, Pozm and Tang. For autopsy works, some samples were chosen in these Landing sites and transported to the stock assessment Laboratory. In this survey, length at first maturity, Length at first capture, spawning period, spawning peak, Gonadosomatic index, condition factor, gastrosomatic index, sex stages, Length frequency and their Fluctuations, M50 (length at which 50% are mature), Length — weigh relationship, the cube law and sex ratio were determined. Length- relationship was calculated according to sex (M&F) and month.