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- W2189386903 abstract "Closely related species may have similar traits not because these traits are adaptive but because they are strongly intercorrelated and inherited from a common ancestor. We examined how intraspecific morphological integration (first principal component within each species) relates to the direction of interspecific divergence in species of two passerine genera (Oenanthe, Ploceus). We used thirteen traits to describe external morphology, more than have been analyzed in any previous study. Ecological data on migration distances, food type, habitat type and type of locomotion were used to interpret interspecific variation. For pairwise comparisons we used closely related species within the set of species studied. In all cases examined, interspecific differences affected several correlated characters at the same time. The direction of interspecific change did not coincide with the main direction of intraspecific variation described by common principal components. In another finding, the main axis of intraspecific variation was not determined solely by variation in size. We used data on six Ploceus species with resolved molecular phylogeny to examine the relationship between morphological integration, morphological differentiation, ecological differentiation and phylogeny. The main direction of morphological integration changed slowly over phylogenetic time and not as a response to immediate adaptive needs. Our main conclusion is that the three different domains of correlated variation (intraspecific, interspecific, ecological) are only loosely interdependent." @default.
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- W2189386903 date "2006-01-01" @default.
- W2189386903 modified "2023-09-27" @default.
- W2189386903 title "S27-3 Interaction between morphological integration and ecological factors" @default.
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