Combined effect of temperature and salinity on embryonic survival of Galaxias maculatus

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Autor:
Barile Sanhueza, Juan - Escudero, Manuel - Carreno Abarzua Eriko
URI:
http://repositoriodigital.uct.cl/handle/10925/2716
Datos de publicación:
REVISTA DE BIOLOGIA MARINA Y OCEANOGRAFIA,Vol.48,641-645,2013
Temas:
Environmental parameters - fish - embryos - Galaxias maculatus
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Resumen:
This study aims to evaluate the effect of temperature and salinity on Galaxias maculatus embryo survival. Embryos were incubated at 5, 10 and 15 degrees C and 0, 10 and 30 psu. At 5 degrees C all salinities induced 100% mortality. Furthermore, salinity of 30, regardless temperature, caused 100% mortality. In freshwater, embryos reached 74.7 and 69.3% survival at 10 degrees C and 15 degrees C, respectively. While, at 10 psu, the larvae survivals were higher, 88.7 and 80.0% with 10 and 15 degrees C respectively. These findings suggest that there is not a temperature- salinity interaction effect on embryonic development of G. maculatus. In conclusion the embryonic development of this fish is only possible at fresh and brackish waters and it is not viable at salt water.

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