Open AccessReproduction of the fish Poeciliopsis gracilis (Cyprinodontiformes: Poeciliidae) in Coatetelco, a tropical shallow lake in Mexico
Author(s) -
José Luis Gómez-Márquez,
Bertha Peña-Mendoza,
Isaías Salgado-Ugarte,
Abby K Sánchez-Herrera,
Leonardo Sastré-Baez
Publication year - 2018
Publication title -
revista de biología tropical
Language(s) - English
Resource type - Journals
eISSN - 2215-2075
pISSN - 0034-7744
DOI - 10.15517/rbt.v56i4.32946
Subject(s) - cyprinodontiformes , poeciliidae , biology , reproduction , gonadosomatic index , sex ratio , sexual dimorphism , fishery , ecology , zoology , fish <actinopterygii> , fecundity , population , demography , sociology
A reproductive analysis of 1 225 specimens of Poeciliopsis gracilis obtained through monthly samples from Coatetelco, a tropical shallow lake in Central Mexico, was made. There was an evident sexual dimorphism, including a difference in body size at the onset of reproduction. Sex ratio deviated significantly from unity. Monthly variations in gonadosomatic (GSI), hepatosomatic (HSI) indexes and ovarian development stages showed that the spawning season was from July to October, coinciding with the rainy season and phytoplankton biomass increase.