112 Reproductive Efficiency , Fry Growth , and Response to Sex
نویسنده
چکیده
The red color pattern in some strains of tilapia has added commercial value in some markets. Although red tilapia may be more marketable, questions have arisen regarding its value as a culture fish. El Gamal (1987) reported that during growout from 130 to 262 g, a red strain of tilapia had significantly lower survival than Oreochromis aureus x Oreochromis aureus and Oreochromis niloticus x Oreochromis niloticus. O. niloticus have shown superior growth during the sex-reversal phase compared to red tilapia (Berger and Rothbard, 1987). Red females produced the same number of fry per kg of body weight as O. niloticus females (El Gamal, 1987).
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