The uses of unusual tilapia in the laboratory (Abstract)
Scott, A.G. (1989). The uses of unusual tilapia in the laboratory (Abstract), in: De Pauw, N. et al. (Ed.) Aquaculture: a biotechnology in progress: volume 1. pp. 573
In: De Pauw, N. et al. (1989). Aquaculture: a biotechnology in progress: volume 1. European Aquaculture Society: Bredene. ISBN 90-71625-03-6. 1-592 pp., meer
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Documenttype: Congresbijdrage
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| Abstract |
Recent developments in the laboratory culture of tilapia have produced several "unusual types" of tilapia, mainly through the use of hormonal sex-reversal of broods or batches of fry. The use of these tilapia has, in the past, been confined predominantly to the production of monosex fry for commercial culture, and indeed a potential new method for the commercial production of 100% YY male O. niloticus is discussed. However, these tilapia have other uses, some of which are illustrated. In O. niloticus the use of hormonal sex-reversal and gynogenesis has enabled the production of tilapia which produce 100% male offspring (the "YY" male tilapia: produced by gynogenesis on the eggs of a phenotypically female, sex-reversed O. niloticus), and the production of tilapia which produce 100% female offspring (phenotypically male sex-reversed tilapia: produced by oral dosage of 17 alpha-methyltestosterone). These monosex-producing fish have been used in three ways: 1) in morphometric investigations; 2) in the study of the effects of sex-influencing hormones; and 3)in the analysis of the sex-determining mechanisms in tilapia. Further potential uses of these, and similar fish, are discussed. |
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