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Trait performance correlations across life stages under environmental stress conditions in the common frog, Rana temporaria
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.
2010 (English)In: PLoS ONE, ISSN 1932-6203, E-ISSN 1932-6203, Vol. 5, no 7, e11680- p.Article in journal (Refereed) Published
Abstract [en]

If an organism's juvenile and adult life stages inhabit different environments, certain traits may need to be independently adapted to each environment. In many organisms, a move to a different environment during ontogeny is accompanied by metamorphosis. In such organisms phenotypic induction early in ontogeny can affect later phenotypes. In laboratory experiments we first investigated correlations between body morphology and the locomotor performance traits expressed in different life stages of the common frog, Rana temporaria: swimming speed and acceleration in tadpoles; and jump-distance in froglets. We then tested for correlations between these performances across life stages. We also subjected tadpoles to unchanging or decreasing water levels to explore whether decreasing water levels might induce any carry-over effects. Body morphology and performance were correlated in tadpoles; morphology and performance were correlated in froglets: hence body shape and morphology affect performance within each life stage. However, performance was decoupled across life stages, as there was no correlation between performance in tadpoles and performance in froglets. While size did not influence tadpole performance, it was correlated with performance of the metamorphosed froglets. Experiencing decreasing water levels accelerated development time, which resulted in smaller tadpoles and froglets, i.e., a carry-over effect. Interestingly, decreasing water levels positively affected the performance of tadpoles, but negatively affected froglet performance. Our results suggest that performance does not necessarily have to be correlated between life stages. However, froglet performance is size dependent and carried over from the tadpole stage, suggesting that some important size-dependent characters cannot be decoupled via metamorphosis.

Place, publisher, year, edition, pages
2010. Vol. 5, no 7, e11680- p.
Keyword [en]
adaptive phenotypic plasticity; post-metamorphic traits; developmental plasticity; larval development; natural-selection; spadefoot toads; history traits; anuran larvae; body shape; tree frog
National Category
Biological Sciences
Identifiers
URN: urn:nbn:se:umu:diva-40366DOI: 10.1371/journal.pone.0011680ISI: 000280197500021PubMedID: 20657779OAI: oai:DiVA.org:umu-40366DiVA: diva2:399446
Available from: 2011-02-22 Created: 2011-02-22 Last updated: 2017-12-11Bibliographically approved

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CiteExportLink to record
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