Diurnal tape-luring of wintering Chiffchaffs results in samples with biased sex ratios

Miguel Lecoq; Paulo Catry

doi:10.1648/0273-8570-74.3.230

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Miguel Lecoq,^1,* Paulo Catry^2,3,**

¹a Rua Barão de Sabrosa, 29-1°, 1900-087 Lisboa, Portugal
²b Unidade de Investigação em Eco-Etologia, Instituto Superior de Psicologia Aplicada, Rua Jardim do
³c Edward Grey Institute of Field Ornithology, Department of Zoology, University of Oxford, Oxford OX

^*Corresponding author. miguel_lecoq@hotmail.com
^**Current address: British Antarctic Survey, High Cross, Madingley Road, Cambridge, United Kingdom

Abstract

We designed a simple experiment to investigate whether the use of diurnal tape-lures could affect the composition of mist-netted samples of wintering Chiffchaffs (Phylloscopus collybita). It was found that use of spring-song tape-lures introduced a highly significant bias of the sex ratio (more males were attracted) but not the age ratio or body condition of the birds. A comparison with results from other studies and species suggests that the use of spring-song tape-lures introduce biases that are varied and difficult to predict.

Citation Download Citation

Miguel Lecoq and Paulo Catry "Diurnal tape-luring of wintering Chiffchaffs results in samples with biased sex ratios," Journal of Field Ornithology 74(3), 230-232, (1 July 2003). https://doi.org/10.1648/0273-8570-74.3.230

Received: 19 July 2002; Accepted: 1 November 2002; Published: 1 July 2003