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Production efficiency in small mammal populations

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Summary

The data used to analyse the relationship between production (P) and respiration (R) in small mammals (Grodziński and French 1983) are reanalysed and different conclusions are drawn. Differences in production efficiency cannot be attributed to any particular trophic classe, but in the higher taxonomic categories the murids have higher production effeciency than the rest. However examination of numerous populations of the same species shows that production efficiencies of congeneric species sometimes differ significantly and show differences which exceed those between higher taxa. The same applies to trophic classes. The low slope described for the regression of P on R for Insectivora is due to an aberrant set of data for Sorex araneus. Production efficiency is directly related to litter size in rodents and inversely to survival of adults. This result conflicts with much earlier work and is discussed at length.

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Authors and Affiliations

  1. Western Australian Museum, Francis Street, 6000, Perth, W.A., Australia

    W. F. Humphreys

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  1. W. F. Humphreys
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Humphreys, W.F. Production efficiency in small mammal populations. Oecologia 62, 85–90 (1984). https://doi.org/10.1007/BF00377378

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  • DOI: https://doi.org/10.1007/BF00377378

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