COMPARATIVE GROWTH PERFORMANCE OF MALE MONOSEX AND MIXED SEX NILE TILAPIA (Oreochromis niloticus L.) REARED IN EARTHEN PONDS

• DOI: 10.14798/73.1.788
• Publication Date: 2015-03-15T23:43:11Z
• Authors: Cecilia Muthoni G...; Erick Ochieng Ogello; Elijah Migiro Kem...; Alfred Otieno Ach...; Kevin Odhiambo Ob...; Jonathan Mbonge M...
• Keywords: Nile tilapia

Comparative growth performance of male monosex and mixed sex Nile tilapia (Oreochromis niloticus) was conducted in six earthen ponds each measuring 150 m 2 at the Kenya Marine & Fisheries Research Institute (KM-FRI), Kegati Aquaculture Station.Male O. niloticus juveniles an average weight 12.2 ± 0.02 g length 7.6 cm were collected from nursery production ponds.The obtained by feeding newly hatched with feed dosed 17--methyltestosterone hormone for a period one month.Stocking 3 juvenile -2 carried out using 28% crude protein diet twice daily months 4% body weight.Selected water quality parameters (dissolved oxygen, temperature, pH, electrical conductivity total ammonia nitrogen) measured weekly situ, while sampling measurements on monthly basis months.Specific Growth Rate (SGR), Feed Conversion Ratio (FCR), Condition Factor (CF) survival rate (%) end months.Data subjected to one-way analysis variance (ANOVA).At months, fishes 200.8 0.81 (mean SE) 123.4 0.76 g, respectively, 22.4 0.21 18.6 0.23 cm, respectively.The achieved significantly increased final length, SGR, FCR CF than (p < 0.05).However, both fish recorded similar rates > 0.05).There no significant differences mean 0.05).The performed better because most energy spent muscle tissue development reproduction activities expense development.Further studies should be done other culture systems such as liner ponds, tanks, cages raceways.