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Gene-environment interactions influence feeding and anti-predator behavior in wild and transgenic coho salmon
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology. DFO Ctr Aquaculture & Environm Res, 4160 Marine Dr, W Vancouver, BC V7V 1N6, Canada..
DFO Ctr Aquaculture & Environm Res, 4160 Marine Dr, W Vancouver, BC V7V 1N6, Canada.;Karolinska Inst, Inst Environm Med, Nobels Vag 13, SE-17177 Stockholm, Sweden..
DFO Ctr Aquaculture & Environm Res, 4160 Marine Dr, W Vancouver, BC V7V 1N6, Canada..
2016 (English)In: Ecological Applications, ISSN 1051-0761, E-ISSN 1939-5582, Vol. 26, no 1, 67-76 p.Article in journal (Refereed) PublishedText
Abstract [en]

Environmental conditions are known to affect phenotypic development in many organisms, making the characteristics of an animal reared under one set of conditions not always representative of animals reared under a different set of conditions. Previous results show that such plasticity can also affect the phenotypes and ecological interactions of different genotypes, including animals anthropogenically generated by genetic modification. To understand how plastic development can affect behavior in animals of different genotypes, we examined the feeding and risk-taking behavior in growth-enhanced transgenic coho salmon (with two-to threefold enhanced daily growth rates compared to wild type) under a range of conditions. When compared to wild-type siblings, we found clear effects of the rearing environment on feeding and risk-taking in transgenic animals and noted that in some cases, this environmental effect was stronger than the effects of the genetic modification. Generally, transgenic fish, regardless of rearing conditions, behaved similar to wild-type fish reared under natural-like conditions. Instead, the more unusual phenotype was associated with wild-type fish reared under hatchery conditions, which possessed an extreme risk averse phenotype compared to the same strain reared in naturalized conditions. Thus, the relative performance of genotypes from one environment (e.g., laboratory) may not always accurately reflect ecological interactions as would occur in a different environment (e.g., nature). Further, when assessing risks of genetically modified organisms, it is important to understand how the environment affects phenotypic development, which in turn may variably influence consequences to ecosystem components across different conditions found in the complexity of nature.

Place, publisher, year, edition, pages
2016. Vol. 26, no 1, 67-76 p.
Keyword [en]
ecological interaction, genetically modified, genotype, growth hormone, plasticity, predation
National Category
Zoology Ecology
URN: urn:nbn:se:uu:diva-282035DOI: 10.1890/15-0252ISI: 000369511000007OAI: oai:DiVA.org:uu-282035DiVA: diva2:916343
Swedish Research Council FormasSwedish Research CouncilEU, European Research Council, MOIF-CT-2005-8141
Available from: 2016-04-01 Created: 2016-04-01 Last updated: 2016-04-01Bibliographically approved

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Sundström, L. Fredrik
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Animal ecology
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