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Updated: Feb 18, 2026
Basic Methods for the Study of Reproductive Ecology of Fish in Aquaria
Published on: July 20, 2017
Genetic parameters in female reproductive traits of Nile tilapia (Oreochromis niloticus)
Grazyella M Yoshida1, Carlos A L DE Oliveira2, Natalí M Kunita2
1Programa de Pós-Graduação em Genética e Melhoramento Animal, Departamento de Zootecnia, Universidade Estadual "Júlio de Mesquita Filho", Faculdade de Ciências Agrárias e Veterinárias, FCAV/UNESP, Via de Acesso Prof. Paulo Donato Castellane, s/n, 14884-900 Jaboticabal, SP, Brazil.
Abstract:
Genetic parameters for reproductive traits in female Nile tilapia were estimated in this study using Bayesian inference method. The data set presented information from 451 Nile tilapia females that were evaluated at two different places in Maringá - Paraná - Brazil (hapas of 1 and 10 m³) and at one location in Alfenas - Minas Gerais - Brazil. A spawning examination was conducted once a week from October 2012 to March 2013 for a total of 23 weeks of evaluation. Single-trait analyses for spawning success, multiple spawning, spawning frequency, and volume of eggs/female were performed by using the software MTGSAM Threshold. The heritability estimates were 0.14, 0.16, 0.53, and 0.08 for spawning success, multiple spawning, spawning frequency and volume of eggs/female, respectively, indicating it is possible to achieve a substantial genetic gain using these reproductive traits as selection criteria.
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