中华绒螯蟹亲蟹的饥饿代谢研究

1998年 10～ 12月 ,对体重为 5 4 .5 9(± 2 .37) g的亲蟹在 2 0 (± 0 .5 )℃温度条件下进行饥饿实验 ,研究了饥饿对中华绒螯蟹亲蟹代谢的影响 .结果表明 ,经过 30d的饥饿处理 ,亲蟹的耗氧率降低为摄食状态的 5 0 .0 % ;CO2 排出率减小为摄食状态的 6 3.4 % ;NH3 N排泄率减小为 5 9.1% .耗氧率和CO2 排出率、NH3 N排泄率的变化差别较大 ,耗氧率的减小可分为 4个阶段 ,而CO2 排出率和NH3 N排泄率的减小仅可分 3个阶段 .与此同时 ,亲蟹的标准代谢水平同样受到饥饿的影响 ,饥饿 30d后 ,由 4 .4 5J·g-1·h-1减小为 2 .36J·g-1·h-1;在饥饿亲蟹的代谢中 ,脂肪消耗最多 ,其次是碳水化合物 .

Starvation metabolism in parent Chinese mitten-handed crab (Eriocheir sinensis)

The experiment was conducted to study the influence of starvation on the metabolism of parent Chinese mitten-handed crab (Eriocheir sinensis) with weights of 54.59 (+/- 2.37) g under 20 (+/- 0.5) degree C during Oct. to Dec., 1998. The results showed oxygen consumption, CO2 production and ammonia-N excretion of the parent crab being starved for 30 days were 50.0%, 63.4%, and 59.1% of those of the fed crab, respectively. The course of oxygen consumption reduction could be divided into four phases: 1) from the 1st day to the 6th day, the metabolic rate decreased remarkably; 2) from the 7th day to the 15th day, the metabolic rate kept relatively stable; 3) from the 16th day to the 25th day, the metabolic rate decreased markedly again; and 4) from 26th day to 30th day (the end time of the experiment), the metabolic rate decreased most dramatically. There were only three phases during the course of CO2 production and ammonia-N excretion reduction. Meanwhile, the standard metabolism of the starved crab reduced from 4.45 to 2.36 J.g-1.h-1, and lipid was used as the first energy source in the course of starvation.