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The distribution of eutherian body weights

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The frequency distributions of eutherian body weights given by Caughley and Krebs (1983) are here corrected for an algebraic error in that publication. The distributions for hervibores and omnivores combined and for carnivores and insectivores combined are bimodal, the trough for the first group lying between 25 and 35 kg and for the second between 0.1 and 0.3 kg. The trough within the distribution of weights for herbivores and omnivores combined has been suggested (Caughley and Krebs 1983) as dividing those species whose populations are regulated intrinsically from the larger species whose populations are regulated extrinsically.

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Caughley, G. The distribution of eutherian body weights. Oecologia 74, 319–320 (1987). https://doi.org/10.1007/BF00379377

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Key words

  • Body size
  • Grazing systems
  • Herbivory
  • Manmals
  • Population regulation