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Mainland size variation informs predictive models of exceptional insular body size change in rodents

Publication ,  Journal Article
Durst, PAP; Roth, VL
Published in: Proceedings of the Royal Society of London B: Biological Sciences
June 17, 2015

The tendency for island populations of mammalian taxa to diverge in body size from their mainland counterparts consistently in particular directions is both impressive for its regularity and, especially among rodents, troublesome for its exceptions. However, previous studies have largely ignored mainland body size variation, treating size differences of any magnitude as equally noteworthy. Here, we use distributions of mainland population body sizes to identify island populations as ‘extremely’ big or small, and we compare traits of extreme populations and their islands with those of island populations more typical in body size. We find that although insular rodents vary in the directions of body size change, ‘extreme’ populations tend towards gigantism. With classification tree methods, we develop a predictive model, which points to resource limitations as major drivers in the few cases of insular dwarfism. Highly successful in classifying our dataset, our model also successfully predicts change in untested cases.

Duke Scholars

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Published In

Proceedings of the Royal Society of London B: Biological Sciences

DOI

Publication Date

June 17, 2015

Volume

282

Issue

1810

Related Subject Headings

  • Rodentia
  • Models, Biological
  • Islands
  • Body Size
  • Biological Evolution
  • Animals
  • Animal Distribution
  • 41 Environmental sciences
  • 31 Biological sciences
  • 30 Agricultural, veterinary and food sciences
 

Citation

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Durst, P. A. P., & Roth, V. L. (2015). Mainland size variation informs predictive models of exceptional insular body size change in rodents. Proceedings of the Royal Society of London B: Biological Sciences, 282(1810). https://doi.org/10.1098/rspb.2015.0239
Durst, P. A. P., and V. L. Roth. “Mainland size variation informs predictive models of exceptional insular body size change in rodents.” Proceedings of the Royal Society of London B: Biological Sciences 282, no. 1810 (June 17, 2015). https://doi.org/10.1098/rspb.2015.0239.
Durst PAP, Roth VL. Mainland size variation informs predictive models of exceptional insular body size change in rodents. Proceedings of the Royal Society of London B: Biological Sciences. 2015 Jun 17;282(1810).
Durst, P. A. P., and V. L. Roth. “Mainland size variation informs predictive models of exceptional insular body size change in rodents.” Proceedings of the Royal Society of London B: Biological Sciences, vol. 282, no. 1810, June 2015. Manual, doi:10.1098/rspb.2015.0239.
Durst PAP, Roth VL. Mainland size variation informs predictive models of exceptional insular body size change in rodents. Proceedings of the Royal Society of London B: Biological Sciences. 2015 Jun 17;282(1810).

Published In

Proceedings of the Royal Society of London B: Biological Sciences

DOI

Publication Date

June 17, 2015

Volume

282

Issue

1810

Related Subject Headings

  • Rodentia
  • Models, Biological
  • Islands
  • Body Size
  • Biological Evolution
  • Animals
  • Animal Distribution
  • 41 Environmental sciences
  • 31 Biological sciences
  • 30 Agricultural, veterinary and food sciences