| Genetic variability in tolerance to copper contamination in a herbivorous marine invertebrate. | |
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MedLine Citation:
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PMID: 20399513 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
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Anthropogenic stresses such as metal contamination can have profound ecological impacts in a wide range of habitats. Reduced survival of organisms in contaminated habitats has the potential to result in the evolution of genotypes tolerant to deleterious contaminants. Local adaptation to contamination requires directional selection, genetic variation in traits relating to tolerance, spatial variability in exposure to the contaminant and limited gene flow between populations. This study assesses variation in tolerance in the herbivorous marine invertebrate Peramphithoe parmerong whose algal diets in Sydney Harbour readily accumulate the metal copper. A quantitative genetics approach (a full-sib, split family design) was used to quantify variation among families in survival on the contaminated diet. A significant genotype-by-environment interaction in offspring survival between the copper contaminated and uncontaminated diet treatments revealed variation in tolerance to copper by P. parmerong. Amphipods that survived 30 days of exposure to copper contaminated diets were slightly smaller and ate less algae than those reared on uncontaminated food. This reflects an additional sub-lethal effect associated with the consumption of contaminated algae. However, there was no evidence of acclimation to contaminated diets, nor a cost of reduced feeding for those genotypes with increased tolerance. This study provides strong evidence for the potential of a marine invertebrate to evolve tolerance to contaminants found in their diet. |
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Authors:
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Ceiwen J Pease; Emma L Johnston; Alistair G B Poore |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2010-04-01 |
Journal Detail:
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Title: Aquatic toxicology (Amsterdam, Netherlands) Volume: 99 ISSN: 1879-1514 ISO Abbreviation: Aquat. Toxicol. Publication Date: 2010 Aug |
Date Detail:
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Created Date: 2010-06-10 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8500246 Medline TA: Aquat Toxicol Country: Netherlands |
Other Details:
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Languages: eng Pagination: 10-6 Citation Subset: IM |
Copyright Information:
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Copyright 2010 Elsevier B.V. All rights reserved. |
Affiliation:
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Evolution & Ecology Research Centre, School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, New South Wales, Australia. ceiwen.pease@unsw.edu.au |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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