Reproductive Biology and Histological Studies in Abu Mullet, Liza abu in the Water of the Khozestan Province

摘要

To study the reproductive biology of Liza abu , 360 samples of this species were collected during the period from February 2007 to January 2008. Reproductive characteristics of Liza abu showed that sex ratio is 1: 2.7 male to female, respectively. This means that females predominate males. Monthly variation in GSI of both sexes were quiet apparent. Maximum values were recorded in March (10.26 and 11.51% for males and females, respectively) and reached to the minimum levels in August (0.42 and 1.15% for males and females, respectively). These cyclic changes in GSI indices are considered as a proof that maturation season is started from January and spawning occurs in April. The maturity stages of male and female Liza abu are separated to 6 different successive stages. These stages in female are immature, resting, developing, developed, spawning (ripe) and post spawning. The testes maturation classified to virgin (immature), maturing virgin, maturing virgin, developing, developed, ripe and spent. The ova diameter ranged from 16.02 to 470.3 . It can be classified into transparent eggs ranging from 16.02 to 106.97 in diameter and yolked egg ranging from 126.82 to 470.3 in diameter.