Masters Theses

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Browsing Masters Theses by Author "John, Maria"

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    Effect of different dietary protein sources on growth performance of rufiji tilapia, oreochromis urolepis urolepis (Norman, 1922)
    (University of Dar es Salaam, 2015) John, Maria
    One of the challenges facing intensive tilapia aquaculture development in developing countries is finding suitable alternatives to fishmeal (FM) from easily available and cheap local dietary protein sources. A 56 days experiment was therefore conducted in 80-liter plastic containers to investigate the suitability of blood meal (BM), sunflower meal (SFM) and Azola meal (AM) as alternative dietary protein sources on growth performance and feed utilization of the Rufiji tilapia, Oreochromis urolepis urolepis Norman (1922). Dry pelleted BM, SFM and AM containing 35% crude protein and 10% lipid were used as a protein sources and FM was used as a control in feeding two sets each containing 10 fingerlings with an average weight of 0.92±0.They were fed twice a day at a daily ration of 5% of the body weight. Water parameters monitored during the study were pH, temperature, salinity and dissolved oxygen concentration. No significant differences (P > 0.05) were found in growth performance and feed utilization in terms of weight gain, protein efficiency ratio, feed conversion ratio, feed intake and specific growth rate in all the three diets used. From the results of the present study fish meal can be replaced up to 15%, 45% and 60% with Azolla, sunflower and blood meals respectively without affecting the general growth performance of the experimental fish. Cost analysis showed that fish feeding on BM was most cost effective followed by AM then SFM.