鳜雌雄生长差异的研究

对雌、雄鳜主要可量性状及其生长速度进行比较研究表明:雌、雄鳜的体长/体高差异极显著,体重/体长差异显著,体长/头长、尾柄长/尾柄高、头长/吻长、头长/眼径之间无显著差异;在相同饲养条件下,体重170 g以内时,雌、雄鳜生长无显著差异;但从170 g到800 g雌鱼的生长速度明显地快于雄鱼;800 g以上雌鱼生长减慢,雄鱼生长开始快于雌鱼;1 kg以内的鳜雌大雄小,1 kg以上时一般雄大雌小。

Studies on the Growth Difference of the Male and Female Siniperca chuatsi

The measured characters and growth speed were studied comparatively between the male and female S.chuatsi.The results indicated that there were very significant discrepancies on the rate of body length to height and the rate of body weight to body length between the male and female S.chuatsi.There was no discrepancy on the rates of body length to head length,trail length to trail height,head length to snot length,head length to eye diameter.Under the same culturing condition,there was no apparent discrepancy on the growth speed between the male and female S.chuatsi that was less than 170 g;The growth speed of the female was obviously faster than the male that was from 170 g to 800 g.When the body weight was more than 800 g,the growth speed of the female slowed down,and the male began to grow faster than the female.In generally,the female is bigger than the male under 1kg,and smaller after 1kg.