Effects of fish meal replacement with protein mixtures on growth, gonad development and amino acid composition of pre-adult red swamp crayfish, Procambarus clarkii (Girard, 1852) (Decapoda, Cambaridae)

Abstract A 100-day growth trial was conducted to evaluate the effects of dietary protein mixtures (PM) adding proportion on both sexes of the red swamp crayfish, Procambarus clarkii (Girard, 1852). Five diets were prepared by replacing 0%, 16.67%, 33.33%, 50%, and 66.67% of fish meal (FM) protein with protein mixtures in feed (designed Diet 1, Diet 2, Diet 3, Diet 4 and Diet 5). The results showed that growth performance presented a decreasing trend with an increase in dietary protein mixture levels. The GSI of female crayfish and the HSI of male crayfish initially increased and then decreased with increasing dietary protein mixtures. Interestingly, the GSI of males fed Diet 5 was higher than that in other groups ( ). Diet 2 was the best feed for female gonad development and male muscle quality. Females fed Diet 3 had the highest muscle quality among the groups; males had improved gonad development when fed Diet 5.