Great tits (Parus major) reduce body mass in response to wing area reduction: a field experiment
Flight performance is crucial in determining whether a small bird will survive an attack by a predator. Given the importance of body mass in determining flight performance, it has been suggested that birds should strategically regulate body mass as a response to predation risk. However, all experiments up to now have been carried out with captive birds, comparing experimental to control birds. Here we present data from the first experiment in the field using a within-individuals experimental design. The wing area of wild great tits, Parus major, was reduced by reversibly taping primaries five to seven. This allowed for the same individual to alternatively act as control or experimental bird. Great tits reduced body mass (but not pectoral muscle width) during episodes of wing area reduction, lending support to the view that the reduction in body mass experienced by birds during molt is a strategy rather than the result of energetic stress. Theoretical models establishing the different trade-offs that determine optimal body mass should therefore take into account this important life-history episode. Copyright 2002.
Year of publication: |
2002
|
---|---|
Authors: | Senar, Joan Carles ; Domènech, Jordi ; Uribe, Francesc |
Published in: |
Behavioral Ecology. - International Society for Behavioral Ecology, ISSN 1045-2249. - Vol. 13.2002, 6, p. 725-727
|
Publisher: |
International Society for Behavioral Ecology |
Saved in:
Online Resource
Saved in favorites
Similar items by person
-
Women's Paid Work in an Urban Developing Economy. Barcelona in 1930
Domènech, Jordi, (2008)
-
The redistributive effects of pandemics : evidence on the Spanish flu
Basco, Sergi, (2020)
-
Land reform and peasant revolution : evidence from 1930s Spain
Domènech, Jordi, (2017)
- More ...