不同饲料对中华圆田螺仔螺生长及存活的影响

Effects of different feeds on the growth and survival of larval Cipangopaludina cahayensis

为研究不同饲料对中华圆田螺仔螺生长及存活的影响,试验选择5日龄仔螺891只,随机分为A、B、C、D、E、F、G、H和I组,每组3个重复,每个重复33只,分别饲喂红球藻粉、小球藻粉、螺旋藻粉、鲜芥菜泥、基础饲料、50%红球藻粉+50%基础饲料、50%小球藻粉+50%基础饲料、50%螺旋藻粉+50%基础饲料和50%鲜芥菜泥+50%基础饲料,在室内20℃进行为期30 d的养殖试验。结果表明:饲喂螺旋藻粉+基础饲料的H组仔螺生长最好,其质量增加率和特定生长率分别为90.91%和2.16%。E、F、A、I、B、C和G组的增重率及特定生长率分别是H组的80.00%(P<0.05)和84.26%,43.32%和50.93%(P<0.01),33.33%和40.74%(P<0.01),23.33%和29.17%(P<0.01),20.00%和24.54%(P<0.01),13.33%和17.59%(P<0.01),10%和12.96%(P<0.01)。饲喂新鲜芥菜泥的D组仔螺的体质量无增长。H组仔螺存活率最高,分别比E、F、A、C、D、I、G、B组高1.04%、4.30%、5.43%(P>0.05)、7.78%、7.78%、11.49%、12.79%(P<0.05)和18.29%(P<0.01)。综述所述,在基础饲料中添加50%的螺旋藻粉能提高中华圆田螺仔螺的生长速度和存活率。

The experiment was conducted to investgate effects of different feeds on the growth and survival of larval Cipangopaludina cahayensis.8915-day-old larvae were randomly divided into A,B,C,D,E,F,G,H,I groups with 3 replicates and 33 larvae in each replicate.Nine diets were formulated to contain Chlorellameal,Haematococcus Pluvialisgmeal,Spirulinameal,fresh mustard,basic feed,50%Haematococcus Pluvialisgmeal+50%basic feed,50%Chlorellameal+50%basic feed,50%Spirulinamea+50%basic feed,50%fresh mustard+50%basic The experiment lasted for 30 d under the condition of 20°C indoors.The results showed that the growth of H group was the best,and its weight gain rate and specific growth rate were 90.91%and 2.16%。The weight gain rate and specific growth rate of E,F,A,I,B,C,and G were 80.00%(P<0.05)and 84.26%,43.32%and 50.93%(P<0.01),33.33%and 40.74%(P<0.01),23.33%and 29.17%(P<0.01),20.00%and 24.54%(P<0.01),13.33%and 17.59%(P<0.01),10%and 12.96%(P<0.01)of H,respectively.There was no increase in the body mass of group D fed with fresh mustard puree.Survival rateo f H group was improve by 1.04%,4.30%,5.43%(P>0.05),7.78%,7.78%,11.49%,12.79%(P<0.05)and 18.29%(P<0.01)respectively than groups E,F,A,C,D,I,G and B.In conclusion,50%Spirulinameal+50%basic feed could improve the growth and survival of larval Cipangopaludina cahayensis.