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Effects of population density on static allometry between horn length and body mass in mountain ungulates

Citation

Pelabon, Christophe et al. (2021), Effects of population density on static allometry between horn length and body mass in mountain ungulates, Dryad, Dataset, https://doi.org/10.5061/dryad.f4qrfj6wr

Abstract

Little is known about the effects of environmental variation on allometric relationships of condition-dependent traits, especially in wild populations. We estimated sex-specific static allometry between horn length and body mass in four populations of mountain ungulates that experienced periods of contrasting density over the course of the study. These species displayed contrasting sexual dimorphism in horn size; high dimorphism in Capra ibex and Ovis canadensis and low dimorphism in Rupicapra rupicapra and Oreamnos americanus. The effects of density on static allometric slopes were weak and inconsistent while allometric intercepts were generally lower at high density, especially in males from species with high sexual dimorphism in horn length. These results confirm that static allometric slopes are more canalized than allometric intercepts against environmental variation induced by changes in population density, particularly when traits appear more costly to produce and maintain.

Methods

The methods to collect the data are described in detail in the supporting information of the paper.

Usage Notes

See Readme file.

Funding

Norges Forskningsråd, Award: 287214