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Int. J. Environ. Res. Public Health 2007, 4(2), 166-172; doi:10.3390/ijerph2007040012
Article

Acclimation to Low Level Exposure of Copper in Bufo arenarum Embryos: Linkage of Effects to Tissue Residues

1,*  and 1,2
1 Members of the Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina 2 Escuela de Ciencia y Tecnología, Universidad Nacional de San Martín, Provincia de Buenos Aires, Argentina
* Author to whom correspondence should be addressed.
Received: 4 December 2006 / Accepted: 30 April 2007 / Published: 30 June 2007
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Abstract

The acclimation possibilities to copper in Bufo arenarum embryos was evaluated by means of three different low level copper exposure conditions during 14 days. By the end of the acclimation period the copper content in control embryos was 1.04 ± 0.09 μg.g-1 (wet weight) while in all the acclimated embryos a reduction of about 25% of copper was found. Thus copper content could be considered as a biomarker of low level exposure conditions. Batches of 10 embryos (by triplicate) from each acclimation condition were challenged with three different toxic concentrations of copper. As a general pattern, the acclimation protocol to copper exerted a transient beneficial effect on the survival of the Bufo arenarum embryos. The acclimation phenomenon could be related to the selection of pollution tolerant organisms within an adaptive process and therefore the persistence of information within an ecological system following a toxicological stressor.
Keywords: Copper; acclimation; amphibian embryos; tissue residues; exposure biomarker Copper; acclimation; amphibian embryos; tissue residues; exposure biomarker
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Herkovits, J.; Pérez-Coll, C.S. Acclimation to Low Level Exposure of Copper in Bufo arenarum Embryos: Linkage of Effects to Tissue Residues. Int. J. Environ. Res. Public Health 2007, 4, 166-172.

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