摘要
为探究不同开口饲料及不同投喂频率对拉萨裂腹鱼(Schizothorax waltoni)仔鱼存活和生长的影响,在水温11℃~12℃,溶氧6.5~7.8 mg/L条件下,选择平均全长14.45 mm仔鱼,设定螺旋藻粉、冰冻轮虫、斑点叉尾鮰饲料、微粒子饲料、草鱼饲料和丰年虫6种开口饲料投喂,再以微粒子饲料投喂,设定6种投喂频率,分别为每2 h、4 h、6 h、8 h、12 h、24 h投喂一次,试验时间42 d。结果显示:冰冻轮虫组存活率显著最低,微粒子饲料组显著最高(P<0.05);投喂频率2 h组存活率显著最低,24 h组显著最高(P<0.05)。微粒子饲料组的全长生长速度最高,与斑点叉尾鮰饲料组和草鱼饲料组差异不显著(P>0.05),但显著高于其他各组(P<0.05);投喂频率12 h组和24 h组生长速度显著高于其他各组(P<0.05),该两组间无显著差异,其他各组间无显著差异(P>0.05)。综合存活率和生长情况考虑,建议在拉萨裂腹鱼仔鱼早期规模化养殖过程中选择微粒子开口饲料,投喂频率为24 h投喂1次效果较好。
In order to explore the effects of different micro diets and different feeding frequencies on the survival and growth of larvae of Schizothorax waltoni,under the conditions of water temperature of 11℃-12℃and dissolved oxygen of 6.5~7.8 mg/L,the larvae with average body length of 14.45 mm were selected and fed with 6 kinds of micro diets,including spirulina powder,frozen rotifers,Ictalurus punctatus diet,microparticle diet,grass carp diet and fairy shrimp,and then fed with microparticle diet at the frequency of feeding every 2 h,4 h,6 h,8 h,12 h and 24 h respectively for 42 days.The results showed that the survival rate of the group fed with frozen rotifers was significantly the lowest,and that of the group fed with microparticle diet was significantly the highest(P<0.05);the survival rate of the group fed at the frequency of feeding every 2 h was significantly the lowest,and that of the group fed at the frequency of feeding every 24 h was significantly the highest(P<0.05).The group fed with microparticle diet had the highest full-length growth rate,not significantly different from the groups fed with Ictalurus punctatus diet and grass carp diet(P>0.05),but significantly higher than the other groups(P<0.05);the growth rate of the groups fed at the frequency of feeding every 12 h and 24 h was significantly higher than that of other groups(P<0.05),with no significant difference between the two groups and no significant difference between the other groups(P>0.05).Considering the survival rate and growth,it is recommended to select the microparticle diet as micro diet in the early scalable breeding process of larvae of Schizothorax waltoni,and feed at the frequency of feeding every 24 h to get the best effect.
作者
曾本和
王万良
张驰
王金林
周建设
ZENG Benhe;WANG Wanliang;ZHANG Chi;WANG Jinlin;ZHOU Jianshe(Institute of Fisheries Science,Tibet Academy of Agriculture and Animal Husbandry,Lhasa 850000,Tibet,China)
出处
《渔业现代化》
CSCD
2020年第4期38-43,共6页
Fishery Modernization
基金
农业农村部行业专项“西藏重点水域渔业资源与环境调查”
西藏重要特有鱼类增殖放流(XZNKYSCS-2020-C-017)
西藏财政专项“西藏种质资源保护和开发——拉萨裂腹鱼和墨脱四须鲃(ZXMKY-2019-053)”。
关键词
拉萨裂腹鱼
仔鱼
开口饲料
投喂频率
生长
Schizothorax waltoni
larvae
micro diets
feeding frequency
growth
