KNAW Repository

Sensitivity to stress in the bivalve Macoma balthica from the most northern (Arctic) to the most southern (French) populations: low sensitivity in Arctic populations because of genetic adaptations?

Hummel, H. and Bogaards, R.H. and Bek, T. and Polishchuk, L. and Amiard-Triquet, C. and Bachelet, G. and Desprez, M. and Strelkov, P.P. and Sukhotin, A.A. and Naumov, A. and Dahle, S. and Denisenko, S. and Gantsevich, M. and Sokolov, K. and De Wolf, L. (1997) Sensitivity to stress in the bivalve Macoma balthica from the most northern (Arctic) to the most southern (French) populations: low sensitivity in Arctic populations because of genetic adaptations? Hydrobiologia, 355, 127-138. ISSN 0018-8158.

[img]PDF - Published Version
Restricted to KNAW only

1250Kb

Official URL: http://dx.doi.org/10.1023/A:1003009524563

Abstract

The stress sensitivity, determined in copper exposure experiments and in survival in air tests, and the genetic structure, measured by means of isoenzyme electrophoresis, were assessed in populations of the Baltic clam Macoma balthica (L.) from its southern to its northern distribution limit, in order to test the hypotheses that near the distribution limit the clams would be more stress sensitive and would have a lower genetic variability. The populations in west and north Europe show a strong genetic resemblance. The populations in the sub- Arctic White Sea are genetically slightly different, and show a low stress sensitivity. The populations in the Arctic Pechora Sea are genetically very distant from the other populations, and show the lowest stress sensitivity. Near the southern distribution limit, in agreement with the hypotheses, genetic variability is low and stress sensitivity high. On the other hand, in contrast to expectation, near the northern distribution limit, in the populations of the Pechora Sea, the genetic variability was higher, thus not reduced, and the stress sensitivity was low compared to ail other populations. Yet, it remains a question if such is due to gradual physiological acclimatization (and ongoing differential selection) or to genetic adaptation. [KEYWORDS: Arctic; adaptation; copper; distribution limit; genetics geographic cline; Macoma balthica; stress sensitivity; survival in air Allele frequency cline; mussel mytilus-edulis; crassostrea-virginica; electrophoretic data; allozyme variation; marine mollusks; differentiation; selection; growth; oyster]

Item Type:Article
Institutes:Nederlands Instituut voor Ecologie (NIOO)
ID Code:10492
Deposited On:25 Nov 2011 01:00
Last Modified:31 Mar 2014 10:22

Repository Staff Only: item control page