Authors: YUSUF KENAN BAYHAN, TARIK ÜNLÜER, MEHMET AKKAYA
Abstract: In this study, carried out between November 2000 and October 2001, the annual spawning period, first maturity length, length frequency distribution and length/weight relationship of Parapenaeus longirostris that inhabit most commonly the Sea of Marmara were investigated. Analysis of the data obtained from this study revealed that although the mature individuals with fully developed eggs were found almost every month throughout the year, the highest gonadosomatic index values were obtained in September, October, December, April and May. The total length at which 50% of the population reaches maturity is calculated to be 9.7 cm. Among the individuals caught, females at 10-11 cm and males at 9-10 cm formed the dominant size groups.
Keywords: Parapenaeus longirostris, spawning period, sexual maturity, length/weight relationship.
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