温度对台湾红罗非鱼能量收支的影响

Effect of temperature on energy budget of Taiwan Residents red tilapia hybrid (Oreochromis niloticus×O.mossambicus).

于 1996年 7～ 8月在盐度为 14的条件下 ,测定了台湾红罗非鱼 (体重 2 5 .3 3 4～ 2 6.2 2 5 g)在水温为 2 2、2 8和 3 4℃时的能量收支 .结果表明 ,温度对台湾红罗非鱼的特定生长率 ,转化效率和最大摄食率均有显著影响 ,2 8℃时上述各值均达到最大 ,分别为 1.79,60 .0 1%和 2 .5 9%B·W·d-1;对吸收率无显著影响 ,对干物质的吸收率的平均值为 64 .5 8% .温度对食物能分配于能量支出各部分的比例有显著影响 ,2 8℃时生长能所占比率最高 ,为 2 6.49% ,代谢能所占比率为 3 7.2 3 % .

The energy budget of Taiwan Residents red tilapia hybrid ( Oreochromis niloticus × O.mossambicus )with a body weight of 25 33～26 23g was measured at salinity 14 and at water temperature 22,28 and 34℃ in July August 1996.The results showed that its specific growth rate,conversion effciency and maximum food consumption were significantly affected by temperature,and reached peaks of 1 79,60 01% and 2 59%B.W.d\+\{-1\} at 28℃.The effect of temperature on the absorption efficiency was not significant,with an average absorption efficiency 64 58%.The effect of temperature on the proportions of food energy allocated to each component of the energy budget was significant.The ratio of growth energy was the highest(26\^4%) at temperature 28℃,and that of metabolism energy was 37\^23%.