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《Fisheries Science》 2018-04
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Growth and Survival of Oriental Weather Loach Misgurnus anguillicaudatus Larvae and Juveniles Stocked in Fertile Water and Clear Water

ZHANG Yunlong;YUAN Juan;ZHANG Zihan;OUYANG Xia;YAO Xiaoli;DONG Zhaoran;BAO Chuanhe;College of Animal Science and Technology,Anhui Agricultural University;Fisheries Technical Extension Center of Feidong County;  
Four days after hatch(DAH)larvae of oriental weather loach Misgurnus anguillicaudatus were stocked in six tanks of each 32 m~2,and the six tanks were randomly divided into two groups(A and B).The water in group A was fertile by applying fertilizer in order to culture live food,while the water in group B was clear,in which the live food applied for the fish in group B was collected from other fertile tanks.The growth,growth dispersion and survival were measured to assess influence of water quality on growth and survival of the oriental weather loach larvae.In the 32 day rearing trial,the good growth performance was observed both in group A and Group B.The best model for total length(L)-body weight(m)relationship according to curve estimate was power with a regression equation of m=0.0674 L~(2.2644)(r~2=0.9888).Both the best model for relationship of body weight(m)to days post hatch(t)and relationship of total length(L)to days post hatch were exponent with regression equations of L=1.8208 e~(0.0878 t)(r~2=0.9471)and m=0.1257 e~(0.2219 t)(r~2=0.8962),respectively.A high level of growth dispersion was found both in group A and group B with the CVTLvalues of around 10,which may be attributed to sexual dimorphism in growth.The survival rate of oriental weather loach larvae was shown to be significantly higher in group B [(54.85±6.09)%]than that in group A[(15.68±3.36)%],suggesting that clear water was more feasible for oriental weather loach larviculture.
【Fund】: 安徽省现代农业产业体系项目(皖农科[2016]84号)
【CateGory Index】: S966.4
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