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NEEDS OF DIETARY CHOLESTEROL FOR JUVENILE SWIMMING CRAB PORTUNUS TRITUBERCULATUS
Author(s): 
Pages: 1524-1529
Year: Issue:  6
Journal: Oceanologia et Limnologia Sinica

Keyword:  swimming crab Portunus trituberculatuscholesterolbroken-linerequirement;
Abstract: To investigate cholesterol requirement by juvenile swimming crab Portunus trituberculatus, six diet groups were set up in one-way analysis model for adding 0.003%, 0.3339%, 0.655%, 0.986%, 1.303%, and 1.628% cholesterol into diet, respectively. Swimming crabs in initial weight about 20g were fed for 8 weeks. Results show that at the end of the experiment, the survival rate was not affected significantly by cholesterol enrichment in all six groups. Weight gain responded linearly to dietary cholesterol supplement up to 0.655% and then went down. Broken-line analysis indicated that dietary cholesterol of 0.6% satisfied the growth performance. At dietary cholesterol supplement 0.655%, crab had the highest weight gain, gland sex index, and carapace width gain. Therefore, we believe that, the optimal dietary cholesterol requirement by juvenile swimming crab was approximately 0.6%.
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