LETTERS TO EDITORS
Characteristic Features of the Effect of Cu and Zn
Mixtures on Rainbow Trout Oncorhynchusmykiss
in Ontogenesis
N. Kazlauskienė, M. Z. Vosylienė
Laboratory of Ecology and Physiology of Hydrobionts, Akademijos 2, Institute of Ecology of Vilnius University,
LT-08412, Vilnius-21, Lithuania
Pol. J. Environ. Stud. 2008;17(2):291-293
KEYWORDS
ABSTRACT
The effects of 96-hour exposure to 0.25, 0.125 and 0.06 portions of the 96-hour LC50 of Cu, Zn singly
and Cu + Zn mixture on biological (survival, gill ventilation frequency, gill-somatic index) parameters of
rainbow trout were studied depending on the stage of development of the fish. Hatching embryos had the
greatest sensitivity to the affect of metals singly and in admixture (the highest percentage of mortality).
Marked changes were recorded in gill ventilation frequency during exposure to these metals singly and
in admixture, which corresponded to changes in their gill-somatic indices. Changes to certain parameters
studied (mortality of embryos, especially hatching embryos, gill-somatic index of juveniles) indicated enhanced
toxicity of the metal mixture to rainbow trout in ontogenesis.
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| eISSN: | 2083-5906 |
| ISSN: | 1230-1485 |
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