Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/3268
Title: GROWTH PERFORMANCE AND FEED UTILIZATION OF CLARIAS GARIEPINUS (TEUGELS) FED DIFFERENT DIETARY LEVELS OF SOAKED BAUHINIA MONANDRA (LINN.) SEED MEAL AND SUN-DRIED LOCUST MEAL (SCHISTOCERCA GREGARIA)
Authors: BALOGUN, BOSE IBILOYE
Keywords: PERFORMANCE,
FEED UTILIZATION,
CLARIAS GARIEPINUS,
TEUGELS,
DIETARY LEVELS,
SOAKED BAUHINIA MONANDRA,
SEED MEAL,
SUN-DRIED LOCUST MEAL,
SCHISTOCERCA GREGARIA.
Issue Date: Jun-2011
Abstract: This study was conducted to evaluate the suitability of soaked Bauhinia seed meal (Bauhinia monandra Linn.) and sun-dried locust meal as alternative protein sources for Clarias gariepinus and to determine whether the use of such unconventional diets could help in reducing the overhead cost of feed inputs in aquaculture. The proximate analysis of the diet, carcass composition of fish, amino acid assay and anti-nutrients were determined using standard methods. Data for each parameter were subjected to analysis of variance (ANOVA) while means of results were compared at 5% level of significance. A preliminary study was conducted to determine the processing method that reduced antinutrients to the minimum level. Boiled, toasted and soaked seeds were used. Soaked Bauhinia seed meal (SBSM) was discovered to have maximum reduction of anti-nutrients. The result of the proximate and anti-nutrients analysis differed significantly (P<0.05) in all the methods. Two experimental diets were formulated to contain SBSM and locust meal (LM) at 0%, 25%, 50% and 75% of the total dietary protein. All diets were isonitrogenous (40% crude protein) and isocaloric (3212kcal/kg). A 12 weeks feeding trial was conducted using juveniles which were randomly distributed among 24 improvised non-recirculatory and semi-flow through indoor plastic tanks of 52cm X 34cm X 33.5cm at a stocking rate of 10 fish per tank and three (3) replicates per treatment. The experimental design was complete randomized. The fish were fed at 5% body weight, twice daily. Diets with higher inclusion levels of SBSM and LM (diets 3 and 4) significantly depressed growth performance of fish [Specific growth rate (SGR): 1.48, 0.22] and SGR (0.57 and 0.56) respectively in both groups compared to diet 1, 2 and 5 (1.67, 0.85 and 1.84) respectively for both groups. The relative levels of anti-nutrients present in SBSM diet after processing may have contributed to the poorer growth performance of these groups, while the presence of chitin may have contributed to poorer growths in the group of fish fed LM. The results suggested that SBSM and LM can be used to substitute up to 25% levels of dietary protein in C. gariepinus juveniles without significant reduction in growth. The results of the specific growth rate (SGR), feed conversion ratio (FCR), feed efficiency ratio (FER), apparent net protein utilization (ANPU), protein efficiency ratio (PER), condition factor (K) and the percentage survival ratio (PSR) were significantly different (P<0.05) in both experimental diets. Based on the relative cost of diets per unit weight gain and protein gain, diet 2 (25% SBSM and 25% LM) were most economical. The variations observed in the SGR, FCR, FER, ANPU, GFCE and PER were associated with the anti-nutrients present in the diets, these parameters reduced with increasing levels of SBSM and LM in the diets of fish. Therefore, more investigations need to be carried out to determine feasible and simple methods for inactivating/reducing the anti-nutrients for efficient inclusion of SBSM and LM in practical diet for C. gariepinus at higher levels.
Description: A DISSERTATION SUBMITTED TO THE SCHOOL OF POSTGRADUATE STUDIES, AHMADU BELLO UNIVERSITY, ZARIA IN PARTIAL FULFILLMENT FOR THE AWARD OF DOCTOR OF PHILOSOPHY (Ph.D FISHERIES) DEPARTMENT OF BIOLOGICAL SCIENCES, FACULTY OF SCIENCE, AHMADU BELLO UNIVERSITY, ZARIA, NIGERIA. JUNE, 2011
URI: http://hdl.handle.net/123456789/3268
Appears in Collections:SCIENCE

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