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Tolerance range and osmoregulation in hypersaline conditions in the European sea bass (Dicentrarchus labrax)

Published online by Cambridge University Press:  21 November 2002

Stamatis Varsamos
Stamatis Varsamos
Affiliation:
E.A. 3009 Adaptation Ecophysiologique au cours de l'Ontogenèse, Laboratoire de Biologie Animale, Université Montpellier II/CC 092, Place Eugène Bataillon, 34095 Montpellier Cedex 05, France, E-mail: [email protected]
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Abstract

The tolerance of the European sea bass to high salinities was determined through abrupt and gradual transfers to different hyperosmotic media. Mortality rate reached roughly 50% in fish abruptly transferred to 70 psu salinity and in fish gradually adapted to 90 psu salinity. All fish abruptly transferred to 90 psu salinity expired in less than three hours. A crisis and regulation type osmoregulatory pattern, related to the range of the osmotic shock, was recorded following abrupt transfers to the tolerable experimental media. The lethal level of blood osmolality in sea bass was determined.

Type
Short Communication
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 82 , Issue 6 , December 2002 , pp. 1047 - 1048
Copyright
© 2002 Marine Biological Association of the United Kingdom

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