| dc.contributor | Universidade Estadual Paulista (UNESP) | |
| dc.creator | Bolnick, Daniel I. | |
| dc.creator | Araujo, Marcio S. | |
| dc.date | 2013-09-30T18:48:15Z | |
| dc.date | 2014-05-20T13:57:35Z | |
| dc.date | 2016-10-25T17:06:26Z | |
| dc.date | 2013-09-30T18:48:15Z | |
| dc.date | 2014-05-20T13:57:35Z | |
| dc.date | 2016-10-25T17:06:26Z | |
| dc.date | 2011-07-01 | |
| dc.date.accessioned | 2017-04-05T21:17:25Z | |
| dc.date.available | 2017-04-05T21:17:25Z | |
| dc.identifier | Evolutionary Ecology Research. Tucson: Evolutionary Ecology Ltd, v. 13, n. 5, p. 439-459, 2011. | |
| dc.identifier | 1522-0613 | |
| dc.identifier | http://hdl.handle.net/11449/20521 | |
| dc.identifier | http://acervodigital.unesp.br/handle/11449/20521 | |
| dc.identifier | WOS:000301681500001 | |
| dc.identifier | http://www.evolutionary-ecology.com/abstracts/v13/2657.html | |
| dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/866210 | |
| dc.description | Background: Numerous models show that if morphology and diet are correlated, frequency-dependent 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 (delta C-13 and delta N-15; 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. | |
| dc.description | Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) | |
| dc.description | Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) | |
| dc.language | eng | |
| dc.publisher | Evolutionary Ecology Ltd | |
| dc.relation | Evolutionary Ecology Research | |
| dc.rights | info:eu-repo/semantics/closedAccess | |
| dc.subject | directional selection | |
| dc.subject | frequency-dependent selection | |
| dc.subject | fitness landscape | |
| dc.subject | function-valued trait | |
| dc.subject | Gasterosteus aculeatus | |
| dc.subject | stabilizing selection | |
| dc.subject | stable isotopes | |
| dc.subject | trophic morphology | |
| dc.title | Partitioning the relative fitness effects of diet and trophic morphology in the threespine stickleback | |
| dc.type | Otro | |
