Effects of Various Substrates, Stocking Densities and Diets on Cage Nursing of Instar Scylla paramamosain

Instar crabs of Scylla paramamosain were nursed in cages for 20 days to compare the effects of substrates,stocking densities and diets on growth performance,survival rate and percentage of limb loss.The results showed,the survival rate of treatment with net pieces as substrate was significantly higher than those with shell of bloody clam or sand(P0.05),while the percentage of limb loss were not affected by substrates(P 0.05);instar crabs stocked at a density of 150 ind/m2 had higher survival rate and lower percentage of limb loss than those of crabs stocked at the density of 250 ind/m2(P 0.05);diets did not affect survival rate and percentage of limb loss(P0.05);the average final weight of crab was not of significant difference(P0.05) among all treatments.