Sex determination in fish: Odontesthes spp. (Atherinopsidae) as experimental models

FERNANDINO, J.I.; HATTORI, R.S.; STRÜSSMANN, C.A.; YAMAMOTO, Y.; SOMOZA, G.M.

Animal Reproduction

Brazilian College of Animal Reproduction

Año: 2015 vol. 12 p. 24 - 27

1806-9614

The sex of the offspring is a unique process leading, in a binary fate, to the development of male or fame characteristics. In this context, the aim of the present work is to present Atherinopsid fish as excellent models to work on sex determination. Here we present two atherinopsid fish from South America; one species, Odontesthes bonariensis, has a strong temperature-dependent sex determination (TSD) and other, Odontesthes hatchery, has genotypic sex determination (GSD). However, the results obtained in the last years from our laboratories in both species show that the boundaries of these two sex determination mechanisms within Atherinopsidae are not as rigid as previously thought and, support the notion that TSD and GSD are the extremes of a continuum.