Effects Of Replacement Of Fish Meal By Housefly Larva Protein On Growth In Litopenaeus Vannamei

Because of the good palatability and rich in nutrition, especially of thebalanceable amino acid composition and rich in unidentified nutrition factor, fishmeal is always a indispensable high quality source of protein in fishery feed. Usually,the content of fish meal in fishery feed is30%~60%, which is the biggest part of cost.Along with the increasing of the fishery animal feeding scale in the world, therequirement of fish meal is continuing increase, and as a result of the lower of fisherycatches and the effect of climatic variation, the price of fish meal is upward and thesupply became unstable. Therefore, find another source of protein which withabundant resource and high quality is the most important thing. As the developmentof enlargement and intensive cultivation of modern aquaculture, the risk of fishinganimals being infected has increased more and more. In order to improve the growingof fishing animals and increase the utilization ratio of the feed, at the same time, toprotect fishing animals from the deseases, lots of scientific researchers pay theirattention to the feed additives which have good function, low price, no toxicity, noside effects, good for environmental protection. Therefore using the safe feed additiveis more and more important.This study used the housefly larva meal to replace fish meal in practical diets forraising experiment of Litopenaeus vannamei. Four isonitrogenous and isoenergeticdiets(ABCD)were formulated．D，a practical diet．was served as a control．A、B andC Were formulated respectively replacing5％，10％and15％fish meal with houseflylarva meal．A8-week feeding experiment was conducted to evaluate effects of dietarysupplementation of housefly larva meal of growth in Litopenaeus vannamei. Theshrimp were fed four times daily．At the end of the feeding experiment，growthperformance were calculated．The results were shown as the follows:1. There is a curvilinear relationship between the body length and total lengthand width of carapace in juvenile prawn. 2. There were no significant differences in growth performance among A、Bgroups and D group (P>0.05), but there was very significant differences in growthperformance between C group and D group (P<0.01)． Growth indexs weredetermined on29d and56d. The results indicated that, In1st stage, The results of thefeeding experiment showed that there was significant differences in growthperformance between A、 B、 C groups and D group (P<0.05), The growthperformance of body length, total length and width of carapace of groups A、B、Cwas higher than control group D(P<0.05). And there was very significant differencesin growth performance between C group and A、B、D groups (P<0.05)；In the2ndstage, The results of the feeding experiment showed that there was very significantdifferences in growth performance between C group and A、B、D groups (P<0.05),The growth performance of body length, total length and width of carapace of groupC was higher than control group A、B、D(P<0.05). And The growth performance ofbody length, total length and width of carapace of group D was higher than controlgroup A、B (P<0.05).Survival rates of group C was higher than the control groupD(P<0.05), And there were no significant differences in growth performance amongA、B groups and D group (P>0.05),3. The detection results of water quality showed that it is not significantlydifference between the additive groups and the control group.The results suggested that the dietary supplementation of pertain level ofhousefly larva meal could improve the growth performance in Litopenaeus vannameiand did not pollute the fishery water，and the appropriate amount of housefly larvameal can be used to substitute partial fish meal in prawn manufactured feed．Theexperimental results have great significance in the aquatic cultivation.