PRELIMINARY STUDY ON GROWTH OF MIXED SEX NILE TILAPIA (AKOSOMBO STRAIN) IN A RESERVOIR-BASED FISH CAGE IN GHANA
Journal Title: International Journal of Farming and Allied Sciences - Year 2015, Vol 4, Issue 1
Abstract
Aquaculture has contributed significantly to food security and employment in Ghana. The Nile tilapia (Oreochromis niloticus) is the major farmed species and constitutes over eighty percent of aquaculture production in the country. The culture of all-male Nile tilapia is well established in Ghana making the acquisition of monosex seed very expensive for the ordinary fish farmers. Therefore, this study sought to investigate the growth performance of mixed sex of O. niloticus (Akosombo strain) in a reservoirbased small cage for affordable fish production. The study was conducted in the Binaba reservoir from August, 2012 to February, 2013. Fingerlings were stocked in a 5 x 4 x 2 m cage and fed with floating commercial feed for six months. Length-weight of fish and water quality data were collected once every month. The results showed that specific growth rate (SGR) was 1.24 %/day, daily weight gain (DWG) 0.87 g, food conversion ratio (FCR) 1.30, condition factor (K) 1.97 and survival rate (SR) 54 %. The highest percent (45 %) of fish harvested weighed 200 – 250 g. The water quality was within acceptable optimal range for fish survival and growth. The results indicated satisfactory growth of mixed sex O. niloticus though the survival was moderately low due to stress-related factors.
Authors and Affiliations
Daniel Nsoh Akongyuure, Etornyo Agbeko and Emmanue Delwin Abarike
Keywords
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