Efecto de la temperatura sobre el crecimiento de juveniles del guapote lagunero (Parachromis dovii)
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Fecha
2001
Autores
Günther Nonell, Jorge
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Universidad Nacional (Costa Rica)
Resumen
En animales exotermos, como los peces, la temperatura corporal varía con la temperatura ambiental. En condiciones de laboratorio estos animales tienden a escoger una temperatura preferencial que coincide aproximadamente con la temperatura óptima para máximo crecimiento (JOBLING 1981, BRITZ y HECHT 1987). Sin embargo, la relación entre el crecimiento y la temperatura es compleja, y los mecanismos fisiológicos todavía no están esclarecidos del todo (SUMPTER 1992). La temperatura óptima para el crecimiento no es un valor invariable sino que depende, entre otros factores, del estado de alimentación y de la edad de los animales (HOGENDOORN et al. 1983, SUMPTER 1992, WATANABE et al. 1993). No obstante, el conocimiento de la relación entre el crecimiento y la temperatura, así como de las temperaturas óptimas en diferentes condiciones son importantes para lograr la máxima eficiencia en el cultivo de especies acuáticas. El guapote lagunero (Parachromis dovii) es un pez cíclido carnívoro de América Central, que está siendo investigado en nuestro laboratorio con miras a establecer su potencial para la acuicultura comercial (GÜNTHER Y ULLOA 1995, GÜNTHER 1996).
In exothermic animals, such as fish, the body temperature varies with the ambient temperature. Under laboratory conditions these animals tend to choose a temperature preference that roughly coincides with the optimum temperature for maximum growth (JOBLING 1981, BRITZ and HECHT 1987). However, the relationship between growth and temperature is complex, and the physiological mechanisms are still not fully understood (SUMPTER 1992). The optimal temperature for growth is not an invariable value but depends, among other factors, on the state of feeding and the age of the animals (HOGENDOORN et al. 1983, SUMPTER 1992, WATANABE et al. 1993). However, knowledge of the relationship between growth and temperature, as well as the optimum temperatures under different conditions are important to achieve maximum efficiency in the culture of aquatic species. The lagoon guinea pig (Parachromis dovii) is a carnivorous cichlid fish from Central America, which is being investigated in our laboratory with a view to establishing its potential for commercial aquaculture (GÜNTHER Y ULLOA 1995, GÜNTHER 1996).
In exothermic animals, such as fish, the body temperature varies with the ambient temperature. Under laboratory conditions these animals tend to choose a temperature preference that roughly coincides with the optimum temperature for maximum growth (JOBLING 1981, BRITZ and HECHT 1987). However, the relationship between growth and temperature is complex, and the physiological mechanisms are still not fully understood (SUMPTER 1992). The optimal temperature for growth is not an invariable value but depends, among other factors, on the state of feeding and the age of the animals (HOGENDOORN et al. 1983, SUMPTER 1992, WATANABE et al. 1993). However, knowledge of the relationship between growth and temperature, as well as the optimum temperatures under different conditions are important to achieve maximum efficiency in the culture of aquatic species. The lagoon guinea pig (Parachromis dovii) is a carnivorous cichlid fish from Central America, which is being investigated in our laboratory with a view to establishing its potential for commercial aquaculture (GÜNTHER Y ULLOA 1995, GÜNTHER 1996).
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Palabras clave
TEMPERATURA, CRECIMIENTO, GUAPOTE LAGUNERO, PARACHROMIS DOVII, EFECTO, GROWTH, TEMPERATURE