Effects of water salinity on the growth of hybrid red tilapia Oreochromis mossambicus (Peters) × Oreochromis niloticus (Linnaeus), cultured under controlled laboratory conditions

Alfredo Mena-Herrera; Héctor Sumano-López; Roberto Macías-Zamora

2002, Number 1

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Vet Mex 2002; 33 (1)

Effects of water salinity on the growth of hybrid red tilapia Oreochromis mossambicus (Peters) × Oreochromis niloticus (Linnaeus), cultured under controlled laboratory conditions

Mena-Herrera A, Sumano-López H, Macías-Zamora R

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Language: English/Spanish
References: 17
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ABSTRACT

Growth rate, as determined by length and weight, for the hybrid tilapia (Oreochromis mossambicus × O. niloticus) was determined. Tilapia hybrids were sex reversed (all male) with a-methyl-testosterone, adapted to 15‰, 25‰ and 35‰ salinities, and cultured over a period of 27 weeks. A control group was cultured in freshwater, and all culture conditions were carried out in duplicates. Stocking density was set at 50 fish/m3. Growth rates among 25‰ and 35‰ salinities vs freshwater were significantly different (P ‹ 0.05). However, no significant differences (P › 0.05) were observed in freshwater vs 15‰ salinity. Final weight means were: 575.07 g in freshwater, 486.86 g in 15‰ salinity, 367.35 g in 25‰ salinity, and 358.58 g in 35‰ salinity. Due to production performance observed, it is feasible to conclude that there are adaptive processes involved when tilapia hybrids are cultured in increased environmental salinity. Hence, if optimal growth is expected, these tilapia hybrids will offer better productive parameters if cultured in salinities not greater than 15‰.

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