Abstract:

In this experiment, based on ninety samples with body weight of 202.3±5.1g(♀) and 251.7±5.9g(♂) of Oreochromis niloticus selected from cultured population, studies on effects of starvation on biochemical components in muscle and gonad development were carried out. In experimental period, body weight of female and male samples decreased significantly in 14d（P<0.05）, and total amplitude in 28d were 19.72% and 15.93% respectively. In early stage of starvation, gonad weight increased constantly until 21d, and total amplitude in 28d of ovary and spermary were 95.93% and 120.31% respectively. During the same period, content of crude fat and crude protein as well as energy density in muscle decreased continuously, the remarkable change of crude fat of female and male samples showed separately in 7d and 14d（P<0.05）, and the similar change of crude protein both showed in 14d. The result showed that starvation had significant effect on biochemical components in muscle and gonad development, in early stage of starvation, experimental samples of Oreochromis niloticus could maintain gonad development by using reserved energy, but the trend slowed gradually until stagnated with the prolonging of starvation. Furthermore, the female samples had lower level of reserved energy, and they usually needed more energy for ovary development, so it could be found that the decline trend of main indexes of female samples appeared earlier than that of male samples with more amplitude in every stage.