A phylogenetic interpretation of sexual dimorphism in body size and ornament in relation to mating system in birds
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...…polygamy and large di¡erences between the sexes in parental care agrees with the traditional explanation of size dimorphism based on intrasexual competition, and Webster's (1992) careful analysis of the New World blackbirds (Icterinae) but is contrary to the conclusions of Bjo« rklund (1990)....
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...Again, these ¢ndings are contrary to Bjo« rklund's (1990) analysis, who found that plumage dimorphism was associated with a high frequency of social polygyny....
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...Our ¢nding that extensive size dimorphism is associated with social polygamy and large di¡erences between the sexes in parental care agrees with the traditional explanation of size dimorphism based on intrasexual competition, and Webster's (1992) careful analysis of the New World blackbirds (Icterinae) but is contrary to the conclusions of Bjo« rklund (1990). In a detailed phylogenetic analysis within the ¢nches (Fringillidae) and buntings (Emberizidae), Bjo« rklund found that size dimorphism was only correlated with mating system before the e¡ects of body size were removed....
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...This scenario, originally favoured byWallace (1889), has recently received support from a series of comparative analyses (Bjo« rklund 1991; Irwin 1994; Martin & Badyaev 1996; Bleiweiss 1997) and is consistent with our ¢nding based on the raw data that overall plumage-colour dimorphism is correlated with sex di¡erences in parental care....
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...However, in this case we suspect the answer may lie in the fact that, whereas we estimated plumage-colour dimorphism, Bjo« rklund used tail length as an index of plumage dimorphism....
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338 citations
Cites background from "A phylogenetic interpretation of se..."
...…dimorphism, its ontogeny, ecological basis and relationship to mating systems, has been the subject of several reviews (e.g. Jarman 1983 for large mammalian herbivores; Hedrick and Temeles 1989; Shine 1989; Bjorklund 1990 for birds; Leigh 1992, 1995; Leigh and Shea 1996 for captive primates)....
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...Jarman 1983 for large mammalian herbivores; Hedrick and Temeles 1989; Shine 1989; Bjorklund 1990 for birds; Leigh 1992, 1995; Leigh and Shea 1996 for captive primates)....
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336 citations
Cites background from "A phylogenetic interpretation of se..."
...Similarly, Bjorklund (1990) and Winquist and Lemon (1994) found that dimorphism in tail length was related to mating system....
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...This has led some to suggest that sexual selection has little influence on some types of size dimorphism (e.g., Bjorklund 1990)....
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"A phylogenetic interpretation of se..." refers background in this paper
...However, there are dangers involved in this kind of study (Harvey and Mace, 1982; Ridley, 1983; Bjiirklund, 1984; Felsenstein, 1985, 1988; Cheverud et al., 1985; Page1 and Harvey, 1988)....
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"A phylogenetic interpretation of se..." refers background in this paper
...A problem recently highlighted by developments in quantitative genetics is that a character can change in evolution, not owing to selection for the trait itself, but as a result of selection of another trait, with which the first trait is correlated genetically (Lande, 1980, 198 1; Lande and Arnold, 1983; Arnold and Wade, 1984; Endler, 1985)....
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...…in quantitative genetics is that a character can change in evolution, not owing to selection for the trait itself, but as a result of selection of another trait, with which the first trait is correlated genetically (Lande, 1980, 198 1; Lande and Arnold, 1983; Arnold and Wade, 1984; Endler, 1985)....
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4,744 citations
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"A phylogenetic interpretation of se..." refers background in this paper
...Introduction Sexual dimorphism in body size in birds is commonly regarded as a result of sexual selection favouring large males through the size-advantage in combats over females (i.e. intra-sexual selection, Darwin, 1871; Selander, 1965, 1972)....
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...Either species become larger when polygyny evolves, which is the traditional prediction in sexual selection theory (Darwin, 1871), or smaller when...
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...Either the dimorphism increases when polygyny evolves, as predicted by sexual selection theory (Darwin, 1871; Arnold, 1983) or decreases when monogamy evolves....
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...Either species become larger when polygyny evolves, which is the traditional prediction in sexual selection theory (Darwin, 1871), or smaller when Sexual dimorphism in birds 179 monogamy evolves....
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