Browsing by Author "Kanyandenge, Zakaria Michael"

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    Assessment of growth performance and feed utilization of the nile Tilapia (Oreochromis niloticus) fingerlings to pumpkin (Cucubrita Maxima) seeds meal as possible altenative fish feed to fish meal in Tanzania
    (University of Dar es Salaam, 2017) Kanyandenge, Zakaria Michael
    This study was designed to determine the effects on growth performance of feeding pumpkin seeds meal as a source of protein to Oreochromis niloticus. Triplicate tanks containing twenty specimens of Oreochromis niloticus of initial average weight of 0.37 ± 0.14 g to 0.43 ± 0.18 g were stocked per concrete tanks for 15 weeks. Three experimental diets each with 40 % crude protein and 1O % crude lipid were formulated and named as fish meal diet (FMD), mixture meal diet (MMD) and pumpkin seed meal (PSM) whereby diet named fish meal diet acted as a control diet without inclusion of pumpkin seeds. Fish were fed two times at rate of 10 % of their body weight per day. Data were analyzed by using one-way ANOVA. There was a significant difference in growth performance and feed utilization efficiency among experimental diets at significance level of 0.05 %. Fish fed fish meal diet (FMD) showed significantly higher average daily weight gain (0.16 ± 0.03 g), final body weight (5.68 ± 0.77 g) and specific growth rate (2.40 ± 0.77 g) followed by mixture meal diet with average daily weight gain (0.14 ± 0.02 g), specific growth rate (2.13 ± 0.63) and final body weight (4.64 ± 0.67 g). Low average daily gain of 0.13 ± 0.25 g and specific growth rate of 1.88 ± 0.44 were realized in pumpkin seed meal. The higher protein efficiency ratio (PER) of 2.59 ± 0.03 was obtained in fish meal diet followed by mixture meal diet (2.49 ± 0.03) and pumpkin seed meal diet (2.34 ± 0.04). Higher feed conversion ratio of 1.89 ± 0.05 was found in fish fed with pumpkin seed meal followed by mixture meal diet and fish meal diet with 1.77 each and survival rate was (SR) 77.87 %. Water quality parameter was within acceptable optimal level for fish growth and survival. The mean observed was water temperature (26.95 ± 0.44 °C), dissolved oxygen (6.8 ± 1.5 mg/L to 9.5 ± 0.3 mg/L) and water pH (7.84 ± 0.18). The result of total replacement of fish meal by using pumpkin seeds meal as dietary plant protein source in Oreochromis niloticus meals was negative.