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Interpopulation differences in expression of candidate genes for salinity tolerance in winter migrating anadromous brown trout ( Salmo trutta L.). / Larsen, Peter Foged; Eg Nielsen, Einar; Koed, Anders; Thomsen, D.S.; Olsvik, P.A.; Loeschcke, V.

In: BMC Genetics, Vol. 9, 2008, p. 12.

Publication: Research - peer-reviewJournal article – Annual report year: 2008

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Larsen, Peter Foged; Eg Nielsen, Einar; Koed, Anders; Thomsen, D.S.; Olsvik, P.A.; Loeschcke, V. / Interpopulation differences in expression of candidate genes for salinity tolerance in winter migrating anadromous brown trout ( Salmo trutta L.).

In: BMC Genetics, Vol. 9, 2008, p. 12.

Publication: Research - peer-reviewJournal article – Annual report year: 2008

Bibtex

@article{b6c71fadaa424e38a73abbfd2ea474ac,
title = "Interpopulation differences in expression of candidate genes for salinity tolerance in winter migrating anadromous brown trout ( Salmo trutta L.)",
publisher = "BioMed Central Ltd.",
author = "Larsen, {Peter Foged} and {Eg Nielsen}, Einar and Anders Koed and D.S. Thomsen and P.A. Olsvik and V. Loeschcke",
year = "2008",
doi = "10.1186/1471-2156-9-12",
volume = "9",
pages = "12",
journal = "BMC Genetics",
issn = "1471-2156",

}

RIS

TY - JOUR

T1 - Interpopulation differences in expression of candidate genes for salinity tolerance in winter migrating anadromous brown trout ( Salmo trutta L.)

A1 - Larsen,Peter Foged

A1 - Eg Nielsen,Einar

A1 - Koed,Anders

A1 - Thomsen,D.S.

A1 - Olsvik,P.A.

A1 - Loeschcke,V.

AU - Larsen,Peter Foged

AU - Eg Nielsen,Einar

AU - Koed,Anders

AU - Thomsen,D.S.

AU - Olsvik,P.A.

AU - Loeschcke,V.

PB - BioMed Central Ltd.

PY - 2008

Y1 - 2008

N2 - Background: Winter migration of immature brown trout (Salmo trutta) into freshwater rivers has been hypothesized to result from physiologically stressful combinations of high salinity and low temperature in the sea. Results: We sampled brown trout from two Danish populations entering different saline conditions and quantified expression of the hsp70 and Na/K-ATPases alpha 1b genes following acclimation to freshwater and full-strength seawater at 2 degrees C and 10 degrees C. An interaction effect of low temperature and high salinity on expression of both hsp70 and Na/K-ATPase alpha 1b was found in trout from the river entering high saline conditions, while a temperature independent up-regulation of both genes in full-strength seawater was found for trout entering marine conditions with lower salinities. Conclusion: Overall our results support the hypothesis that physiologically stressful conditions in the sea drive sea-run brown trout into freshwater rivers in winter. However, our results also demonstrate intra-specific differences in expression of important stress and osmoregulative genes most likely reflecting adaptive differences between trout populations on a regional scale, thus strongly suggesting local adaptations driven by the local marine environment.

AB - Background: Winter migration of immature brown trout (Salmo trutta) into freshwater rivers has been hypothesized to result from physiologically stressful combinations of high salinity and low temperature in the sea. Results: We sampled brown trout from two Danish populations entering different saline conditions and quantified expression of the hsp70 and Na/K-ATPases alpha 1b genes following acclimation to freshwater and full-strength seawater at 2 degrees C and 10 degrees C. An interaction effect of low temperature and high salinity on expression of both hsp70 and Na/K-ATPase alpha 1b was found in trout from the river entering high saline conditions, while a temperature independent up-regulation of both genes in full-strength seawater was found for trout entering marine conditions with lower salinities. Conclusion: Overall our results support the hypothesis that physiologically stressful conditions in the sea drive sea-run brown trout into freshwater rivers in winter. However, our results also demonstrate intra-specific differences in expression of important stress and osmoregulative genes most likely reflecting adaptive differences between trout populations on a regional scale, thus strongly suggesting local adaptations driven by the local marine environment.

U2 - 10.1186/1471-2156-9-12

DO - 10.1186/1471-2156-9-12

JO - BMC Genetics

JF - BMC Genetics

SN - 1471-2156

VL - 9

SP - 12

ER -