饥饿和恢复投喂对亚东鲑幼鱼的补偿生长  

Compensatory Growth of Juvenile Brown Trout Salmo trutta by Starvation and Recovery Feeding

作　　者：王万良 王建银[2] 周建设 曾本和 张驰 潘瑛子 牟振波 

机构地区：[1]西藏自治区农牧科学院水产科学研究所,西藏拉萨850032 [2]西藏自治区农牧科学院,西藏拉萨850032

出　　处：《水产科学》2018年第1期100-104,共5页Fisheries Science

基　　金：西藏自治区自然科学基金资助项目(2016ZR-NK-15)

摘　　要：为研究亚东鲑幼鱼的补偿生长,采用循环水系统设备,将平均体质量(5.48±0.46)g的幼鱼放在长方形平列槽中,保持溶解氧6.5~8.5mg/L,水温14~16℃,通过饥饿0(对照组)、7、14、21d和28d处理,随后分别恢复投喂49、42、35、28d和21d,每个处理组100尾幼鱼,并设置3个平行。试验结果表明,饥饿7、14、21d组的平均体质量生长率和体长增长率均显著低于对照组(P<0.05),饥饿28d组出现负增长;肝体指数随着饥饿时间加长依次增大,但饥饿7、14d组与对照组差异不显著(P>0.05);肥满度依次减小,饥饿7、14、21d组与对照组差异不显著(P>0.05);饥饿7、14d组的特定生长率显著高于对照组和饥饿21、28d组(P<0.05),摄食率和食物转化率14、21d组显著高于对照组和饥饿21、28d组(P<0.05)。由此可知,亚东鲑幼鱼属于部分补偿生长和不能补偿生长两种补偿生长类型,可能是代谢滞后假说和食欲增强假说共同作用的结果。Juvenile brown trout Salmo trutta with body weight of（5.48±0.46）g was fasted in a rectangular groove for,0（as control）,7,14,21 dand 28 d,and then fed for 49,42,35,28 d and 21 d at with triplication at dissolved oxygen levels of 6.5—8.5 mg/L,and water temperature of 14—16℃ to study the compendatory growth.The results showed that average body weight growth rate and body length growth rate were significantly lower at 7,14 dand 21 dthan those at 0 d（P〈0.05）.The hepato-somatic index was found to be increased with the starvation time,without significant difference between 7 dand 14 d（P〈0.05）.The condition factor was decreased in turn,without significant difference between 7,14 dand 21 d（P〈0.05）.The specific growth rate was significantly higher at 7 dand 14 dthan that at 0 d,21 dand 28 d（P〈0.05）,and food intake and food conversion efficiency was significantly higher at 14 dand 21 d than those at 0 d,7 dand 28 d（P〈0.05）.Therefore,brown trout is of fish with two compensation growth type,partial compensatory growth and no compensatory growth,this may be the result of combination of a metabolic lag and an appetite enhancement.

关 键 词：亚东鲑 幼鱼 饥饿 恢复投喂 补偿生长 

分 类 号：S965.199[农业科学—水产养殖]