Dietary reduction of fish meal, supplementation of vitamin C and fish oil may promote ovary maturation by improving digestibility and immunity in Procambarus clarkii (Crustacea: Decapoda)

摘要

Fish meal, vitamin C and fish oil are known to play essential roles in reproduction and immunity in animals. To investigate how the diet affect reproduction under the condition of reducing costs, we designed an experimental diet that decreased the ratio of fish meal with soybean meal from 1:1 to 1:1.5, and supplemented with 0.06% vitamin C and 3.8% fish oil for the crayfish, Procambarus clarkii. After a 100-day feeding experiment, female crayfish fed the test diet had significantly greater gonadosomatic index (GSI) compared with those fed the basal diet (P?