摘要
对中华绒螯蟹幼蟹的耗氧率、CO2 排出率及NH3-N排泄率进行了测定 ,并研究了幼蟹的能耗率及能源物质的供能比。结果表明 ,体重 ( 2 70± 1 4 0 )g的幼蟹 ,在水温 ( 2 0± 0 5 )℃时 ,耗氧率、CO2 排出率和NH3-N排泄率分别为 ( 0 4 14± 0 0 91)mg·g-1·h-1、( 0 4 76± 0 12 5 )mg·g-1·h-1和 ( 4 179± 1 171) μg·g-1·h-1;标准代谢的蛋白质、碳水化合物和脂肪提供的能量比为 7 3∶3 8 8∶5 3 9。其耗氧率 (R0 )受水中溶氧水平的影响 ,并与体重(W )呈负相关 (R0 =0 84 0 3W-0 72 6 5)。
The standard metabolism of the juvenile Eriocheir sinensis collected from Shanghai were studied under their non feeding and resting conditions from Oct. to Dec of 1998 and 1999,respectively.The results showed that oxygen consumption,CO 2 production and ammonia N excretion of the juvenile crab weight (2 70±1 40)g were (0 414±0 091)mg·g -1 ·h -1 ,(0 476±0 125)mg·g -1 ·h -1 and (4 179±1 171)μg·g -1 ·h -1 at (20±0 5)℃,respectively.Respiratory quotients,oxygen nitrogen ratio and metabolic substrate ratio were used to describe the substrate metabolism of crabs.It indicated that oxidation of lipid dominated energy metabolism while carbohydrate and protein were the second and the third sources of energy metabolism,and energy ratio of protein,carbohydrate and lipid in metabolic substrate of the crabs was 7 3∶38 8∶53 9.The rate of oxygen consumption of juvenile crabs( R 0)was remarkably affected by the level of oxygen dissolved in water,and negatively correlated with the body weight ( W ) of the crabs ( R 0=0 8403 W -0 7265 , n =33, r =-0 9097, P <0 01).
基金
国家自然科学基金项目 ( 39770 5 78)
霍英东青年教师基金项目
