00000ctm a22000004a 4500 UP-8027390931313939575 Buklod 20150806154721.0 m |o d | ta 150806s2013 xx d r |||| u| (iLib)UPVIS-00038156434 LG 995 2013 F5 C43 Chavez, Nicole Niña G. Water hyacinth (Eichhornia crassipes) leaf protein concentrate as soybean protein replacement in Litopenaeus vannamei postlarvae diet by Nicole Niña G. Chavez. Iloilo College of Fisheries, University of the Philippines 2013 62 leaves Thesis (M. S.Fisheries-Aquaculture) -- Miagao, Iloilo : University of the Philippines Visayas, December 2013. An assessment of the nutritive value of water hyacinth leaf protein concentrate (WHLPC) as a dietary proetin source in formulated diets was carried out in Litopenaeus vannamei postlarvae. Four experimental diets with 0%, 25%, 50%, and 75% of the soybean meal dietary protein replaced by WHLPC, were formulated. All diets were formulated t be isonitrogenous (38% crude protein) and isolipidic (8% crude lipid). Diet containing soybean meal, fishmeal and squid meal as protein sources served as the control. The experimental diets were fed to triplicate groups of shrimp for ten weeks in 30-L aquarium tanks. Results show that growth and overall biological performance of shrimps in terms of SGR, PER, FCE, and survival in treatment receiving the 25% WHLPC replacement is comparable to that of the treatment receiving the full soybean meal diets. Replacement levels beyond 25% tend to elicit significant depression in biological growth performance of the shrimp. Gross carcass composition of the L. vannamei postlarvae was not significantly affected (P>0.05) with increasing levels of WHLPC i the diet. Survival was high among treatments even at the highest WHLPC replacement levels. Digestibility measured in terms of nutrient hydrolysis using midgut gland extract showed that WHLPC is more digestible than both fishmeal and soybean meal dietary ingredients. In conclusion, soybean meal can be substituted with WHLPC to about 25% in the diet of L. vannamei without affecting the overall biolgical performance of the shrimp. Water hyacinth (Eichhornia crassipes) Litopenaeus vannamei. UPVIS UPV-CFOS LG 995 2013 F5 C43 UPVIS UPV-GL LG995 2013 Thesis