摄食水平对梭鱼的生长和能量收支的影响

EFFECT OF RATION SIZE ON THE GROWTH AND ENERGY BUDGET OF THE MULLET LIZA HAEMATOCHEILA (T. ET S.)

于 1 999年 8— 1 2月 ,在水温为 (2 4 .0± 0 .5 )℃ ,摄食水平分别为体重的 0 %、1 %、2 %、3 %、4%和饱食的条件下进行梭鱼的摄食 -生长实验。结果表明 ,梭鱼湿重、干重、蛋白质和能量的特定生长率 (SGR)与摄食水平呈直线关系 ,其转化效率与摄食水平的增加成正比 ;梭鱼的湿重、蛋白质、干重和能量的维持水平分别为体重的 1 .85 1、1 .85 3、2 .882和 2 .3 4 2 (% d) ;排粪率和排泄率随摄食水平的增加而增加 ,并呈直线关系。在最大摄食水平下 ,能量收支等式为 :1 0 0C =4.41F +1 1 .1 8U +47.0 6R +3 7.3

Effect of ration size on growth and energy balance for the juvenile mullet, Liza haematocheila (T. et S.), was studied from August to December in 1999 at (24.0±0.5)℃. The fish were fed commercial pelleted food at 6 ration sizes from starvation to maximum. A linear relationship existed between ration size and specific growth rate of the wet body weight, dry body weight, protein and energy content of the mullet, indicating that the conversion efficiency increased with ration size. The maintenance ration of the wet body weight, dry body weight, protein and energy of the mullet were 1.851, 1.853, 2.882 and 2.342, respectively. Rates of faecal production and nitrogen excretion increased with ration. At maximum ration size, energy budget equation was yielded as 100C=4.41F+11.18U+47.06R+37.35G.