Physiological responses of tilapia (Oreochromis sp.) fry, a non-native invasive species, to chronic exposure to high temperatures

Santillan E.T.; Alvarez-Bejar G.O. · Revista Peruana de Biologia (2025) · DOI: 10.15381/rpb.v32i3.29494

Resumen

This study evaluated the effects of three chronic exposure temperatures (26, 30, and 34 °C) on the physiological responses of tilapia (Oreochromis sp.) fry and analysed the possible implications of these findings for Amazonian fish species in the context of global warming. Growth rate, oxygen consumption, and thermal tolerance of tilapia increased with temperature, reaching the highest performance at 34 °C. These results demonstrate the species’ high metabolic capacity to withstand elevated thermal stress. In contrast, previous studies on native Amazonian fishes indicate a limited ability for acclimation and thermal tolerance, placing them at a competitive disadvantage compared to invasive species under increasing temperature conditions. In conclusion, rising temperature enhances the physiological performance of tilapia while simultaneously increasing the vulnerability of native Amazonian fish species. © Los autores. Este artículo es publicado por la Revista Peruana de Biología de la Facultad de Ciencias Biológicas, Universidad Nacional Mayor de San Marcos. Este es un artículo de acceso abierto, distribuido bajo los términos de la Licencia Creative Commons Atribución 4.0 Internacional. (https://creativecommons.org/licenses/by/4.0/deed.es) que permite Compartir (copiar y redistribuir el material en cualquier medio o formato), Adaptar (remezclar, transformar y construir a partir del material) para cualquier propósito, incluso comercialmente.

Instituciones: Universidad Nacional Mayor de San Marcos