Chapter 7 - Monosex population in aquaculture

https://doi.org/10.1016/B978-0-323-91240-2.00012-9Get rights and content

Abstract

Monosex population consisting of either sex (all male or all female) of aquatic species has great potential in aquaculture. The potential benefits of monosex population include achieving faster growth by taking advantage of bisexual dimorphism in aquaculture traits as seen in a few commercially important species; control of precocious sexual maturation and early reproduction; and preventing the risk of impact on environment in case of escape to wild of especially exotic or unwanted species. Fish as a group have different sex determination mechanisms. As a result, the manipulation of sex aimed to produce monosex population is not simple as it appears and is not predictable. Among different methods for production of monosex population for aquaculture, direct sex reversal using external hormones to produce all male or female is the most commonly used techniques in large-scale monosex production. Approaches like production of gynogenic females or androgenic males or transgenic populations have created little impact in aquaculture industry. Production of genetically all-male tilapia using YY male technology is one such example, where it is proved that genetic technology can be widely adopted by the aquaculture industry as seen in many countries.

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