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Warming alters the body shape of European perch Perca fluviatilis
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology. Stockholm Univ, Dept Zool, S-10691 Stockholm, Sweden..
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
Univ Gothenburg, Dept Biol & Environm Sci, S-40530 Gothenburg, Sweden..
Norwegian Univ Sci & Technol, Dept Biol, N-7491 Trondheim, Norway..
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2015 (English)In: Journal of Fish Biology, ISSN 0022-1112, E-ISSN 1095-8649, Vol. 87, no 5, 1234-1247 p.Article in journal (Refereed) Published
Abstract [en]

The consequences of elevated temperature on body shape were investigated by comparing European perch Perca fluviatilis from the Forsmark area of the Baltic Sea to P. fluviatilis from a nearby Biotest enclosure. The Biotest is a man-made enclosure within the Baltic Sea that has received warm water from a nuclear power plant since 1980, resulting in temperatures that are elevated 5-10 degrees C relative to the surrounding Baltic Sea. Sampled fish ranged from young-of-the-year to 14years. Geometric morphometrics and multivariate statistical analysis revealed significant morphological differences between individuals of P. fluviatilis from these two habitats. Most importantly, relative shape changed with size, with small individuals of P. fluviatilis from Biotest being characterized by a deeper body shape and a larger caudal peduncle than the smaller Baltic individuals. In large specimens, smaller differences were found with Biotest individuals being more slender than Baltic individuals. These results show that, in order to have a full understanding of the biological effects of elevated temperatures, studies that cover the entire size range of organisms will be important. Apart from the direct influence of temperature on growth rate and body shape, other ecological factors affected by temperature are discussed as possible contributors to the observed differences between the two populations.

Place, publisher, year, edition, pages
2015. Vol. 87, no 5, 1234-1247 p.
Keyword [en]
climate change, fish morphology, geometric morphometrics, ontogeny, phenotypic plasticity
National Category
Zoology
Identifiers
URN: urn:nbn:se:uu:diva-267659DOI: 10.1111/jfb.12785ISI: 000363590400008PubMedID: 26440307OAI: oai:DiVA.org:uu-267659DiVA: diva2:873939
Funder
Swedish Research Council FormasSwedish Research CouncilSwedish Research Council Formas
Available from: 2015-11-25 Created: 2015-11-25 Last updated: 2017-12-01Bibliographically approved

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