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  3. June 2023

June 2023

Growth Performance Comparison of Sex Reversed Oreochromis Macrochir (Boulenger, 1912), Oreochromis Andersonii (Castelnau, 1861) and Oreochromis Niloticus (Linnaeus, 1758) Juveniles Under Pond Culture

1Edwin Kikamba, 2Chad Kancheya, 3Sauti Kalima, 4Alexander Kefi
1,2National Aquaculture Research Development Centre, P.O. Box 22797, Kitwe, Zambia
3Chipata Aquaculture Research Station, Chipata, Zambia
4Department of Fisheries, Lusaka, Zambia
DOI : https://doi.org/10.58806/ijirme.2023.v2i6n02

Abstract

A study was carried out at the National Aquaculture Research and Development Centre, Fish Farm, to evaluate the effect of 17α-Methyltestosterone on the growth performance of fry of Oreochromis andersonii, Oreochromis macrochir and Oreochromis niloticus raised for a period of ninety day. The first 21 days, the fry (0.04g±0.001) across all treatments were fed on commercial feed incorporated with 17α-Methyltestosterone for the purpose of achieving sex reversal to all males and were held in 1m x 1m x 1.3 mhapas installed in a 400 m2 semi concrete pond, at a stocking density of 250 fry per hapa and replicated three times in a completely randomized design. There were no significant differences (P>0.05) in the final weight gain among the species of O. andersonii (1.8240±0.067g), O. macrochir (2.6830±0.3220g) and O. niloticus (2.3960±0.2230g). The Body weight gain (g), Specific growth rates (SGR) and Apparent feed conversion ratios didn’t significantly differ (P>0.05) among the treatments. There were also no significant differences (P>0.05) in the Final standard lengths (mm) at termination which ranged from 32.485±0.8600 to 37.5330±2.9320 whose stocking mean length ranged from 9.58±0.41 mm to 10.17±0.31 mm. Survival rates (%) ranged from 97.00±0.5774 to 99.00±1.000 and did not significantly differ (P>0.05) among treatments. These results indicate that the effect of 17α-Methyltestosterone on the growth of fry of the three species produce similar result. The present study demonstrates that each species can substitute the other and still produce similar results, hence a farmer having a wider choice.

Keywords:

Aquaculture; 17α Methyltestosterone; Oreochromis species; Commercial feed; Feed conversion ratio

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