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Simpson GB, Mayer DG. MORPHOMETRIC ANALYSIS OF VARIATION INNALA LIVIDIPES(DUFOUR) ANDLABIDURA TRUNCATAKIRBY (DERMAPTERA: LABIDURIDAE). ACTA ACUST UNITED AC 2007. [DOI: 10.1111/j.1440-6055.1990.tb00365.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Dobson FS, Zinner B, Silva M. Testing models of biological scaling with mammalian population densities. CAN J ZOOL 2003. [DOI: 10.1139/z03-060] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Two hypotheses have been suggested to explain the form of interspecific scaling of organismal characteristics to body size, such as the well-known increase in total metabolism with body mass. A hypothesis based on simple Euclidean geometry suggests that the scaling of many biological variables to body size should have a scaling exponent of 2/3, or [Formula: see text]0.667. On the other hand, according to a hypothesis based on fractal dimensions, the relationship between biological variables and body mass should have a scaling exponent of 0.750. We conducted a power analysis of the predicted exponents of scaling under the Euclidean and fractal hypotheses, using average adult body masses and population densities collected from the published literature on mammalian species. The collected data reflect 987 mammal populations from a broad variety of terrestrial habitats. Using statistical methods we determined the sample sizes required to decide between the values of the scaling exponent of the density-to-mass relationship based on the Euclidean (0.667) and fractal (0.750) hypotheses. Non-linearities in the dataset and insufficient power plagued our tests of the predictions. We found that mammalian species weighing less than 100 kg had a linear scaling pattern, sufficient power to reveal a difference between the scaling coefficients 0.667 and 0.750, and an actual scaling coefficient of 0.719 (barely significantly different from 0.667 but not from 0.750). Thus, our results support the fractal hypothesis, though the support was not particularly strong, which suggests that the relationship between body mass and population density should have a scaling exponent of 0.750.
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SIMPSON GB. EFFECTS OF SOIL TYPE AND MOISTURE ON DEVELOPMENT AND REPRODUCTION OF NALA LIVIDIPES (DUFOUR) (DERMAPTERA: LABIDURIDAE). ACTA ACUST UNITED AC 1991. [DOI: 10.1111/j.1440-6055.1991.tb00437.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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