Reproductive Aspects of Yellow Fish Girardinichthys Multiradiatus (Meek, 1904) (Pisces: Goodeidae) in the Huapango Reservoir, State of Mexico, Mexico

Abstract

The sexual maturity, age at first maturation and fecundity in females of the yellow fish Girardinichthys multiradiatus were analyzed in the Huapango reservoir located in the State of Mexico, Mexico. From July 2007 to May 2008 bimonthly samplings were carried out and, using a bait well net, 407 individuals were collected (245 females and 162 males). Overall, the sex ratio between females/males was 1.51:1 (P <0.05). The age of first maturation in the females was 33 mm of standard length. The spawning period occurred in July and accounted for the highest values in the gonadosomatic index. For the fertility model only fertilized eggs and embryos were considered, and those were adjusted to the potential model F=1E-08L5.6144 (P <0.05). This study contributes to the understanding of the reproductive biology of the yellow fish, which takes place in the reservoirs of the State of Mexico.