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Genetic and environmental components of fish sex determination and differentiation

AutorPiferrer, Francesc
Fecha de publicación20-oct-2014
EditorSwedish Museum of Natural History
CitaciónFishBase Symposium 2014 : Fish and genes (2014)
ResumenFish constitute the largest and most diverse group of vertebrates with over 30,000 recognized species. This great biological diversity is not only evident in morphological aspects, habitats, feeding types, etc., that fish exhibit, but also in relation to their reproduction. Thus, fish have all reproduction types known in vertebrates, including gonochorism or separate sexes, hermaphroditism, and unisexuality. However, regardless of a particular type of reproduction, the sex ratio, i.e., the number of males and females, is a central demographic parameter that influences the structure of populations and determines their reproductive potential. In this lecture, I will discuss the genetic and environmental components of fish sex determination and differentiation, the major mechanisms responsible for the sex ratio. Sex determination is the genetic or environmental process by which the sex (gender, male or female) of an individual is established in a simple binary fate decision. The inheritance of sex is based on three main effects: major sex factors, minor sex factors, and environmental differences. On the other hand, sex differentiation includes the various molecular, genetic, and physiological mechanisms that produce a male or female from a zygote of a given genotype and parents in a given environment. In the last years, major advances have been made in our understanding of these processes by combining different approaches, including molecular genetics, quantitative genetics and epigenetics. Understanding the genetic and environmental influences on the establishment of fish sex ratios has implications to understand the evolution of sex determining mechanism, for sex allocation theory and for speciation. It also has practical interest for assessing the reproductive capacity of wild populations, to monitor them in a scenario of global change, and for sex control in aquaculture production and in the eradication of invasive species
DescripciónFishBase Symposium 2014: Fiskarnas gener. FishBase Symposium 2014 : Fish and genes, 20 October 2014, Stockholm, Sweden
Versión del editorhttp://artedi.nrm.se/fishbase/?p=147
Aparece en las colecciones: (ICM) Comunicaciones congresos
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