DIE'l'ARY CHOLESTEROL REQUIREMENT OF LARVAE AND POSTLARVAE OF THE PRAWN PENAEUS INDICUS (H. MILNE EDWARDS)
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Authors
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R. PAULRAJ
College of Fisheries, Shirgaon, Ratnagiri - 415 629, Maharashtra
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M. S. CHANDGE
College of Fisheries, Shirgaon, Ratnagiri - 415 629, Maharashtra
Abstract
Two sets of experiments were conducted to determine the dietary
cholesterol requirement of larvae and postlarvae 1~10 of Penaeus indicus.
Seven approximately isocaloric and isonitrogenous purified experimental
diets were tried with graded levels of cholesterol ranging from 0 to 4%.
The control feed for larvae and postlarvae 1~10 were phytoplankton and
compounded feed NPCL·17, developed by CMFRI, Cochin respectively.
Result of these experiments indicate that cholesterol is an essential
·nutrient in the diet of larvae and postlarvae 1-10. Survival and growth of
larvae and postlarvae 1-10 were greatly affected by cholesterol deficiency
in the diet. The optimal cholesterol requirement for larvae appeared to
be 0.5% of the diet, while it was higher for postlarvae where inclusion of
cholesterol at a level of 2% in the diet gave higher growth.
