GROWTH AND NUTRIENT UTILIZATION OF AFRICAN CATFISH(CLARIAS GARIEPINUS BURCHELL, 1822) FED VARYING LEVELS OF ALBIZIA LEBBECK (BENTH) LEAF MEAL
GROWTH AND NUTRIENT UTILIZATION OF AFRICAN CATFISH(CLARIAS GARIEPINUS BURCHELL, 1822) FED VARYING LEVELS OF ALBIZIA LEBBECK (BENTH) LEAF MEAL
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Date
2015-03
Authors
OYELERE, ELIZABETH ADENIKE
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Abstract
This study examined the dietary sustainability of Albizia lebbeck leaf meal as alternative source of protein to soya bean meal in Clarias gariepinus diet. The leaf was treated by rinsing with water after plucking from the stalk and then soaked for twenty-four hours to reduce its bitterness and toxicity. It was then shade dried and ground into powder. Proximate analysis revealed the differences in the values of Crude protein of raw (28.06%), soaked and shade- dried (26.06%) as well as soaked and sundried (26.19%) A. lebbeck leaf. Analysis of anti- nutrient composition from the raw, soaked and shade- dried as well as soaked and sun-dried A. lebbeck leaf sample revealed the presence of alkaloid, flavonoid, tannin and saponin. Varying inclusion levels of A. lebbeck in the Diet formulated was 0%, 10%, 20% and 30% isonitrogenous feed (40% crude protein) and then a commercial Diet. Ten C. gariepinus fingerlings were allotted to fifteen (twenty litres) rectangular plastic tanks and cultured for ten weeks with the initial average weight of 4.11g at seven weeks where each Diet had three replicates. Growth performance and nutrient utilization parameters revealed that fish fed 10% A. lebbeck leaf meal gave the best weight gain (60.66g), the least was obtained in those fed Control (0%) Diet (29.17g). Similar trend occurred in specific growth rate where fish fed 10% A. lebbeck leaf had the highest (3.93g) and the lowest occurred in fish fed Control (0% A. lebbeck inclusion level) as 3.03g.Fish fed Diet containing 20% A. lebbeck inclusion level and those fed the Commercial Diet had close range values in their weight. Feed intake showed was significant difference p<0.05 where highest value was obtained in fish fed diet with 10% A. lebbeck inclusion level (58.18g) while the lowest was obtained in fish fed Control (0% A. lebbeck inclusion level) as 44.23g. There was significant difference p<0.05 in protein efficiency ratio where fish fed diet with 10% A. lebbeck inclusion level had the highest value (2.57g) while the fish fed control (0% A. lebbeck inclusion level) had the lowest (1.67g).Net protein utilization showed no significant difference p<0.05 though, fish fed diet containing 10% A. lebbeck had higher value (61.32g) among other diets while the those fed control Diet (0% A. lebbeck inclusion level) recorded lowest value (56.67g). Feed conversion ratio was significantly different among the diets where fish fed control diet (0% A. lebbeck inclusion level) had the highest (1.57%) while the lowest occurred in in fish fed diet containing 10% A. lebbeck (0.96%). The Carcass crude protein composition obtained by the fish was
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significantly different p<0.05 between the initial (46.344%) and final value ranging from (51.07% to 54.95%) and also among the Diets, the highest value 54.95% was obtained in fish fed diet containing 10% A. lebbeck inclusion level while those fed the control Diet (0% A. lebbeck inclusion level) had the lowest value (51.07%). This result recommends that protein in the diet of C. gariepinus can be replaced up to 10% A. lebbeck inclusion level without compromise in the fish growth performance
Description
A THESIS SUBMITTED TO THE SCHOOL OF POSTGRADUATE STUDIES, AHMADU BELLO UNIVERSITY, ZARIA IN PARTIAL FULFILMENT OF THE REQIUREMENTS FOR THE AWARD OF MASTERS DEGREE IN EDUCATIONAL BIOLOGY DEPARTMENT OF BIOLOGICAL SCIENCES AHMADU BELLO UNIVERSITY, ZARIA NIGERIA
Keywords
GROWTH AND NUTRIENT UTILIZATION, AFRICAN CATFISH(CLARIAS GARIEPINUS BURCHELL, 1822), ALBIZIA LEBBECK (BENTH) LEAF MEAL