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- W1874137716 abstract "Three traditional allometric hypotheses of allometry (geometric, elastic and static stress isometry) are tested, using measurements of bones of Scandinavian raptors. The hypothesis of dynamic similarity is discussed but the data available do not allow for testing it. Five new allometric relationships based on three types of loads (pressure, buckling and bending caused by forces proportional to body mass or muscle force) are introduced and tested. The results show that all hypotheses, except one, fall within 95% confidence interval of at least one allometric relationship. Geometric and elastic similarities are most frequent but the other similarities do apply, too. The five new allometric hypotheses suggest the following: wing bones are adapted to resist muscle forces (both pressure, buckling and bending). Leg bones on the other hand are subjected to resist forces proportional to body mass, either to buckling (femur and tibiotarsus) or to pressure (carpometacarpus). The results can also be interpreted in this way: Wing bones are longer but not significantly thicker (and therefore not stronger) than expected from isometry. Leg bones are significantly thicker (and therefore probably stronger) than expected from isometry, but isometric in length, except for tarsometatarsus, which is shorter than expected from isometry. Introduction The scope of ecological morphology is to identify how different morphological characteristics of animals are related to their ecological habitat and the animals’ actions in this habitat or niche (see, for example, Norberg 1979, 1981, Zeffer et al. 2003). Classical examples among birds are the relationship between the form and size of the bill and how it is used for feeding (the most well known example is probably Darwin’s finches), or the shape of the bird’s foot and how it is used (Norberg 1979, Greenwalt 1975). One important aspect of morphology, and the subject of this article, is the role of size and how this influences the shape, construction and the behaviour of the animal." @default.
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- W1874137716 date "2006-01-01" @default.
- W1874137716 modified "2023-09-27" @default.
- W1874137716 title "Allometry and ecomorphology of Scandinavian raptors" @default.
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