Partitioning the relative fitness effects of diet and trophic morphology in the threespine stickleback

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversity of Texas at Austin-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorBolnick, Daniel I.-
Autor(es): dc.creatorAraújo, Márcio S.-
Data de aceite: dc.date.accessioned2025-08-21T15:11:35Z-
Data de disponibilização: dc.date.available2025-08-21T15:11:35Z-
Data de envio: dc.date.issued2022-04-29-
Data de envio: dc.date.issued2022-04-29-
Data de envio: dc.date.issued2011-07-01-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/226707-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/226707-
Descrição: dc.descriptionBackground: Numerous models show that if morphology and diet are correlated, frequencydependent competition will lead to fitness differences among phenotypically dissimilar individuals within a species. Hypothesis: Selection acts primarily on diet, and only indirectly on morphology via its correlation with diet. Field sites and organism: British Columbia, Canada; 340 individual threespine stickleback (Gasterosteus aculeatus) from McNair Lake and 430 individuals from First Lake. Measurements: Stable isotopes (δ 13C and δ 15N; a proxy for diet); trophic morphology (quantitative traits and geometric shape variables); and growth rates (RNA/DNA ratios; a proxy for the component of fitness arising from competitive or foraging ability). Analysis: Linear and quadratic regression of growth rate on stable isotopes and morphological variables to calculate the relationship between growth (a fitness proxy) and diet and/or morphology. When both morphology and isotopes affected growth rates, we used a path analysis to separate their effects. Conclusions: In the McNair Lake population, growth was dependent primarily on diet type and only indirectly on trophic morphology. In a second population, path analysis found that isotopes and body shape separately explain variation in growth rates. We infer that, in stickleback, selection on trophic morphology is often a correlated side-effect of selection on diet composition, rather than direct fitness effects of morphology per se. © 2011.-
Descrição: dc.descriptionHoward Hughes Medical Institute Section of Integrative Biology University of Texas at Austin, Austin, TX-
Descrição: dc.descriptionDepartamento de Ecologia Instituto de Biociencias Universidade Estadual Paulista, Rio Claro, SP-
Descrição: dc.descriptionDepartamento de Ecologia Instituto de Biociencias Universidade Estadual Paulista, Rio Claro, SP-
Formato: dc.format439-459-
Idioma: dc.languageen-
Relação: dc.relationEvolutionary Ecology Research-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectDirectional selection-
Palavras-chave: dc.subjectFitness landscape-
Palavras-chave: dc.subjectFrequency-dependent selection-
Palavras-chave: dc.subjectFunction-valued trait-
Palavras-chave: dc.subjectGasterosteus aculeatus-
Palavras-chave: dc.subjectStabilizing selection-
Palavras-chave: dc.subjectStable isotopes-
Palavras-chave: dc.subjectTrophic morphology-
Título: dc.titlePartitioning the relative fitness effects of diet and trophic morphology in the threespine stickleback-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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