Journal of Ornithology

, 150:685

Differential migration of the sexes cannot be explained by the body size hypothesis in Teal

  • Matthieu Guillemain
  • Richard Hearn
  • Roy King
  • Michel Gauthier-Clerc
  • Géraldine Simon
  • Alain Caizergues
Short Note

DOI: 10.1007/s10336-009-0375-5

Cite this article as:
Guillemain, M., Hearn, R., King, R. et al. J Ornithol (2009) 150: 685. doi:10.1007/s10336-009-0375-5

Abstract

The “body size hypothesis” predicts that if individuals of a population migrate different distances from the breeding to the wintering grounds, the distance should be related to the differential ability to cope with adverse conditions, with larger individuals wintering further north. Data collected over a 40-year period in Essex, UK and the Camargue, southern France, revealed that the average body mass of Teal ringed in Essex during these years was actually not greater than that of Teal ringed in the Camargue. A higher proportion of males were included in the UK ringing catch than in the French catch, but we found no support for the body size hypothesis to explain such differential migration of the sexes.

Keywords

Age ratio Anas crecca Body mass Differential migration Sex ratio Teal Winter 

Copyright information

© Dt. Ornithologen-Gesellschaft e.V. 2009

Authors and Affiliations

  • Matthieu Guillemain
    • 1
  • Richard Hearn
    • 2
  • Roy King
    • 2
  • Michel Gauthier-Clerc
    • 3
  • Géraldine Simon
    • 3
  • Alain Caizergues
    • 4
  1. 1.Office National de la Chasse et de la Faune SauvageCNERA Avifaune MigratriceArlesFrance
  2. 2.Wildfowl and Wetlands TrustSlimbridgeUK
  3. 3.Centre de Recherche de la Tour du ValatArlesFrance
  4. 4.Office National de la Chasse et de la Faune SauvageCNERA Avifaune MigratriceNantesFrance

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