REPRODUCTIVE ASPECTS OF GIRARDINICHTHYS MULTIRADIATUS, MEEK 1904 (PISCES: GOODEIDAE)

Abstract

This paper discusses biology reproductive aspects of the yellow fish G. multiradiatus in the reservoir of Villa Victoria located in the State of Mexico, Mexico. Monthly samplings were carried from November, 2005 to October, 2006. 657 organisms were collected using a baitwell net. The sex ratio of females/males was 2.27:1 (p <0.05) and the size at first maturation for the females was 32 mm of standard length. The spawning season occurred between March and November, corresponding to the highest values of the gonadosomatic index. For the fecundity pattern, only the fecundated eggs and embryos were considered, which were adjusted to potential model (F = 0.0001L^3.331, p <0.05). The basic biology studies on this species are important because G. multiradiatus is endemic and literature on the species is insufficient.