Journal of Ornithology

, 150:685

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

Authors

    • Office National de la Chasse et de la Faune SauvageCNERA Avifaune Migratrice
  • Richard Hearn
    • Wildfowl and Wetlands Trust
  • Roy King
    • Wildfowl and Wetlands Trust
  • Michel Gauthier-Clerc
    • Centre de Recherche de la Tour du Valat
  • Géraldine Simon
    • Centre de Recherche de la Tour du Valat
  • Alain Caizergues
    • Office National de la Chasse et de la Faune SauvageCNERA Avifaune Migratrice
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 ratioAnas creccaBody massDifferential migrationSex ratioTealWinter

Copyright information

© Dt. Ornithologen-Gesellschaft e.V. 2009