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The use of all-male populations increases the efficiency and feasibility of tilapia aquaculture. The objective of this study was to determine the efficacy of a short-term immersion procedure for masculinizing Nile tilapia (Oreochromis niloticus). Two synthetic androgens were evaluated: 17α-methyldihydrotestosterone (MDHT) and 17α-methyltestosterone (MT). Exposure (3h) on 10 and again on 13 days post-fertilization...
A major problem in tilapia aquaculture is the frequent reproduction of female fish, leading to increased competition for supplemented food and stunted somatic growth. The feasibility of using photoperiod manipulation to arrest the reproductive performance of tilapia Oreochromis niloticus was therefore examined. Newly hatched O. niloticus were reared in the laboratory under 12L:12D photoperiod at 28...
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