Viability of brown trout embryos positively linked to melanin-based but negatively to carotenoid-based colours of their fathers
| Autor: | Sébastien Nusslé, Claus Wedekind, Alain Jacob, Rudolf Müller, Guillaume Evanno |
|---|---|
| Přispěvatelé: | Department of Ecology and Evolution, Biophore, Université de Lausanne, Swiss Federal Insitute of Aquatic Science and Technology [Dübendorf] (EAWAG) |
| Rok vydání: | 2008 |
| Předmět: |
Male
0106 biological sciences Trout Offspring [SDV]Life Sciences [q-bio] salmonid Zoology Biology 010603 evolutionary biology 01 natural sciences Statistics Nonparametric General Biochemistry Genetics and Molecular Biology 03 medical and health sciences Brown trout Genetic variation Animals Salmo 030304 developmental biology General Environmental Science Melanins Carotenoids/physiology Female Genetic Variation Melanins/physiology Pigmentation/physiology Trout/embryology Trout/genetics Genetics good-genes sexual selection 0303 health sciences General Immunology and Microbiology Pigmentation offspring survival genetic load General Medicine Phenotypic trait biology.organism_classification Carotenoids Genetic load heritability of colour traits Sexual selection General Agricultural and Biological Sciences Research Article |
| Zdroj: | Proceedings of the Royal Society B: Biological Sciences Proceedings of the Royal Society B: Biological Sciences, Royal Society, The, 2008, 275 (1644), pp.1737-1744. ⟨10.1098/rspb.2008.0072⟩ Proceedings of the Royal Society B Biological Sciences, vol. 275, no. 1644, pp. 1737-1744 |
| ISSN: | 1471-2954 0962-8452 |
| DOI: | 10.1098/rspb.2008.0072 |
| Popis: | ‘Good-genes’ models of sexual selection predict significant additive genetic variation for fitness-correlated traits within populations to be revealed by phenotypic traits. To test this prediction, we sampled brown trout (Salmo trutta) from their natural spawning place, analysed their carotenoid-based red and melanin-based dark skin colours and tested whether these colours can be used to predict offspring viability. We produced half-sib families byin vitrofertilization, reared the resulting embryos under standardized conditions, released the hatchlings into a streamlet and identified the surviving juveniles 20 months later with microsatellite markers. Embryo viability was revealed by the sires' dark pigmentation: darker males sired more viable offspring. However, the sires' red coloration correlated negatively with embryo survival. Our study demonstrates that genetic variation for fitness-correlated traits is revealed by male colour traits in our study population, but contrary to predictions from other studies, intense red colours do not signal good genes. |
| Databáze: | OpenAIRE |
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