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International Journal of Morphology

On-line version ISSN 0717-9502

Abstract

PEPE-VICTORIANO, Renzo; ARAYA, Miguel  and  FAUNDEZ, Víctor. Temperature Effect on Embryonic Survival and Early Larval Stages of Psetta maxima. Int. J. Morphol. [online]. 2012, vol.30, n.4, pp.1551-1557. ISSN 0717-9502.  http://dx.doi.org/10.4067/S0717-95022012000400046.

The mortality rate in embryonic and larval stages of marine fish is associated with the success of a culture, being necessary to optimize the procedures from this to the level of embryonic development and early larval stages for an optimal larval survival and better juvenile production. In order to evaluate temperature effect on embryonic and larval survival of Turbot, fertilized eggs of two reproductives were transferred to the conical incubation tanks at three different temperatures (12.5; 15.5 and 18.5C). The eggs that were at extreme temperatures (12.5 y 18.5C) had a minor embryonic development, with a daily mortality rate significantly higher in the first three days and at the end of incubation, especially during the egg eclosion (10% survival), and without variations at the end of the experiment, when larvae had six days of life. The duration of embryonic development up to the egg eclosion was also determined by incubation temperature, with a higher number of hatched eggs and harvested at the temperature of 15.5°C (20% survival). Significant differences in the embryonic development of Turbot at three different incubation temperatures indicate the importance of this parameter on the viability of embryonic development and early larval stages of P. maxima.

Keywords : Fish's Egg; Turbot; Fish larvae.

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