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Article
Sex-Related Dispersal in the Mountain Plover (Charadrius montanus)
Auk
  • Paul D. B. Skrade, Iowa State University
  • Stephen J. Dinsmore, Iowa State University
Document Type
Article
Publication Version
Published Version
Publication Date
7-1-2010
DOI
10.1525/auk.2010.09059
Abstract

The rapid multiclutch mating system of the Mountain Plover (Charadrius montanus) provides an opportunity to examine sex differences in natal, within-year, and between-year breeding dispersal. We used nest locations over a 14-year period from a population of Mountain Plovers breeding on prairie dog colonies in Montana to examine sex-related patterns in natal and within-year breeding dispersal. Additionally, we modeled between-year dispersal distances in relation to sex, previous nest fate, and the occurrence of sylvatic plague in the colonies. We also modeled successive nest fate using dispersal distance and these same covariates. We found no evidence of sex differences in distances moved during natal dispersal (mean = 13.0 km for 16 males; mean = 10.2 km for 22 females) or within-year breeding dispersal (mean = 2.8 km for 22 males; mean = 3.0 km for 26 females). The mean (+- SE) dispersal distance was 2.7 +- 0.60 km (n = 115) for males nesting in consecutive years and 4.3 +- 0.87 km (n = 87) for females.

Previous nest fate was the only factor that had a strong effect on between-year breeding dispersal. On average, birds that were previously successful moved 3.0 +- 0.55 km (n = 149), whereas unsuccessful birds moved 4.6 +- 1.18 km (n = 53). None of the effects tested was suitable for predicting subsequent nest fate. Our work provides a better understanding of dispersal in an uncommon shorebird, additional insight into a novel mating system, and a basis for testing theories of avian dispersal.

Comments

This article is from Auk 127 (2010): 671, doi:10.1525/auk.2010.09059. Posted with permission.

Copyright Owner
The American Ornithologists’ Union
Language
en
Date Available
2015-02-27
File Format
application/pdf
Citation Information
Paul D. B. Skrade and Stephen J. Dinsmore. "Sex-Related Dispersal in the Mountain Plover (Charadrius montanus)" Auk Vol. 127 Iss. 3 (2010) p. 671 - 677
Available at: http://works.bepress.com/stephen_dinsmore/49/