Abstract

HERNANDEZ-SANDOVAL, P. et al. Population dynamics and growth modeling of Oreochromis aureus in the Josefa Ortiz de Domínguez reservoir, Sinaloa, Mexico. Revista bio ciencias [online]. 2023, vol.10, e1454.  Epub Feb 23, 2024. ISSN 2007-3380.  https://doi.org/10.15741/revbio.10.e1454.

Tilapia fish Oreochromis aureus represents the main source of income for the fishing sector in the Josefa Ortiz de Dominguez reservoir, Sinaloa, Mexico. It is of utmost importance to provide biological-fishery information to lay the foundation for the proper management of this species. Based on information from monthly commercial fishery samples collected from October 2011 to April 2012 in this reservoir, growth was modeled using the Schnute growth model, and the best submodel (cases) was selected according to the Akaike Information Criterion (AIC). The maturity size for females and selectivity for total organisms was estimated with the logistic model. From the 1,689 tilapia analyzed, sizes ranged from 125-305 mm total length (TL) for females and 125-370 TL for males. The best cases of the Schnute growth model were 2 and 5 according to the AIC. The estimated mature length for females was 197 mm TL. Based on the assessments of growth, size at maturity, and selectivity, data suggest that the commercial fishery may be having a direct negative impact on the O. aureus tilapia broodstock and juveniles in this reservoir.

Keywords : Blue tilapia; El Sabino reservoir; maturity size; selectivity; Akaike.

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