期刊名称：International Journal of Development and Sustainability
印刷版ISSN：2186-8662
出版年度：2013
卷号：2
期号：2
页码：825-837
出版社：International Society for Development and Sustainability (ISDS)
摘要：Two commercial aquaculture feed diets available on the Ghanaian market was subjected to daily feeding of Oreochromis niloticus and growth parameters and economic profitability evaluated in a 66.67 m3cages. The 12 week trial performed using 16,000 fish with mean weight 102.17 ¡À 3.1 g was sampled, counted and divided equally to four cages. The two test diets (Diet I: Nicoluzzi and Diet II: Rannan) were in duplicate. Mean live weights of fish in trial groups reached 420.23 ¡À 20.44 g and 408.62 ¡À 54.31 g for test Diets I and II respectively. Growth data indicated that, the final live weight, average daily weight gain, condition factor showed no significant difference among test diets (p > 0.05).The best FCR of 1.47 was obtained from test Diet I. Specific growth rate also showed similar values. High gross and net yield was recorded for fishes fed with Diet I and could be due to their relatively good growth performance, good feed conversion rate, relatively high survival rate which, in turn, gave high profit index of 1.87.The total feed fed to fish allotted Diet II was high which reflected in the total cost of feed, coupled with the high price of feed per kilo. This increased the cost of production (in Diet II cages) affected the profit index (1.76) generated from the sale of fish although not significant from fish fed Diet I. The results suggest that, both test diets with almost similar crude protein level, is economical and may be recommended for production. However, alternative source of cheap and cost effective feeds needs to be investigated and encourage our local industry in the production of relatively cheaper aquaculture feeds.
关键词：Akosombo strain; Treatment diets; Proximate composition; Profit index
