微囊饲料替代水蚯蚓对短须裂腹鱼仔鱼生长和存活的影响  

Effect of Microencapsulated Feed as Substitute for Tubifex on Growth and Survival Rate of Larval Schizothorax Wangchiachii

作　　者：何青松 徐大勇[1] 黄志秋[1] 董艳珍[1] HE Qingsong;XU Dayong;HUANG Zhiqiu;DONG Yanzhen(School of Animal Science,Xichang University,Xichang,Sichuan 615013)

机构地区：[1]西昌学院动物科学学院

出　　处：《西昌学院学报（自然科学版）》2019年第4期12-15,共4页Journal of Xichang University(Natural Science Edition)

基　　金：凉山州科学技术与知识产权局项目（17NYCX0015）;西昌市教育科学知识技术局项目（14JSY10）;2017年国家级大学生创新创业项目（教高司函〔2017〕7号）

摘　　要：以初始体质量为(15.5±1.65)mg的7日龄短须裂腹鱼仔鱼为试验对象,用微囊饲料对水蚯蚓的不同替代水平(0%、25%、50%、75%、100%)投喂28 d,通过测定全长、体质量、特定生长率、存活率来分析微囊饲料替代水蚯蚓对短须裂腹鱼仔鱼生长存活的影响。结果表明:微囊饲料替代水蚯蚓下特定生长率由高到低依次为0%替代组(5.73±0.08)>25%替代组(4.80±0.28)>50%替代组(4.67±0.28)>75%替代组(4.18±0.51)>100%替代组(3.13±0.20);存活率由高到低依次为75%替代水平组(77.83±6.11%)>50%替代水平组(76.50±4.35%)>25%替代水平组(71.33±4.01%)>100%替代水平组(70.00±3.96%)>0%替代水平组(64.00±6.61%)。综合分析,微囊饲料部分替代水蚯蚓在短须裂腹鱼培育中是苗种可行的,并且25%~50%的替代水平可以保持较快的生长和较高的成活率。Seven-day-old larvae of Schizothorax wangchiachii with average body weight of(15.5±1.65)mg were randomly divided into five treatments with tubifex’s microencapsulated feed substitute at levels of 0%(0% MF),25%(25% MF), 50%(50% MF), 75%(75% MF) and 100%(100% MF) to examine the effects of the substitute feed(MF) on the growth, survival rate of larval Schizothorax wangchiachii through determination of its total length, body weight, specific growth rate( SGR) and survival rate. The results showed that the descending order of specific growth rate in five different substitute levels was expressed as 0% MF(5.73±0.08)>25% MF(4.80±0.28)>50% MF(4.67±0.28)>75% MF(4.18±0.51)>100% MF(3.13±0.20)and the descending order of survival rate in five different substitute levels was expressed as 75% MF(77.83±6.11%)>50% MF(76.50±4.35%)>25% MF(71.33±4.01%)>100% MF(70.00±3.96%)>0% MF(64.00±6.61%). Comprehensive analysis shows that it is feasible to partially substitute microencapsulated feed for ubifex in the breeding of Schizothorax wangchiachii, and 25%-50%of the substitution level can guarantee faster growth and higher survival rate.

关 键 词：短须裂腹鱼 仔鱼 微囊饲料 替代 水蚯蚓 

分 类 号：S965.199[农业科学—水产养殖]