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Efecto del pH sobre la supervivencia embrionaria, periodo embrionario y de eclosión de Galaxias maculatus

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Juan Barile

jbarile@uct.cl

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1

Escuela de Acuicultura, Universidad Católica de Temuco, Av. Rudecindo Ortega 02950 Temuco, Chile

Manuel Escudero

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1

Escuela de Acuicultura, Universidad Católica de Temuco, Av. Rudecindo Ortega 02950 Temuco, Chile

Luisa Jara

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1

Escuela de Acuicultura, Universidad Católica de Temuco, Av. Rudecindo Ortega 02950 Temuco, Chile

Resumen

This study aims to evaluate the effect of pH on embryonic survival of Galaxias maculatus. Embryos were incubated at 6 different pH levels in the water. One-way ANOVA was used to compare averages between treatments and Tukey test to determine  post hoc differences. The Probit regression was used to estimate the embryonic and the hatching period. Embryos survive pH from 5 to 11 and die at pH extremes 3 and 13. The best average survival rates were obtained at neutral pH (78.7 ± 1.2) and as the pH decreases away from embryonic survival 7 embryonic survival decreases. In conclusion, pH is an important factor to consider for the production of larval G. maculatus.

Palabras clave

Pisciculture, embryos, incubation, pH tolerance

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