饥饿状态下草鱼生长激素的分泌

THE SECRETION OF GROWTH HORMONE IN STARVED GRASS CARP, CTENOPHARYNGODON IDELLUS

以两种规格草鱼为对象 ,研究了饥饿对其生长激素分泌的影响。检测由背大动脉导管抽取的连续血样的结果表明 :饥饿状态下草鱼 (体重为 0 .5- 1 .0kg)生长激素分泌仍是间歇性的 ,但饥饿明显提高其总体生长激素平均值、基础生长激素平均值和其最大峰值。对于草鱼鱼种 (体重为 2 5- 30 g) ,饥饿也明显提高其血液中生长激素水平 ,但草鱼种的肥满度系数和血糖浓度却降低。在体外灌流实验中 ,饥饿的草鱼种脑垂体碎片生长激素基础分泌值明显高于正常投喂的对照组。这些结果表明

The effects of starvation on the secretion of growth hormone were investigated in juvenile and fingerling grass carp. Serial blood samples via the dorsal aorta cannulae showed that the GH secretion of starved juvenile grass carp (bodyweight 0.5-1.0kg) was still episodic, but with higher values of average GH, basal GH, and peak GH. As to the fingerling grass carp (bodyweight 25-30g), starvation increased their serum GH levels but decreased their condition Coefficient and concentrations of blood glucose. In vitro perfused pituitary fragments of starved grass carp fingerling basal GH secretion was higher than that of fed control. These results indicated that GH secretion in grass carp was being enhanced under starvation.