Choice of nest attributes as a frontline defense against brood parasitism
Moreras, Angela; Tolvanen, Jere; Morosinotto, Chiara; Bussiere, Elsa; Forsman, Jukka; Thomson, Robert L. (2021-09-14)
Angela Moreras, Jere Tolvanen, Chiara Morosinotto, Elsa Bussiere, Jukka Forsman, Robert L Thomson, Choice of nest attributes as a frontline defense against brood parasitism, Behavioral Ecology, Volume 32, Issue 6, November/December 2021, Pages 1285–1295, https://doi.org/10.1093/beheco/arab095
© The Author(s) 2021. Published by Oxford University Press on behalf of the International Society for Behavioral Ecology. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com. This is a pre-copyedited, author-produced version of an article accepted for publication in Behavioral Ecology following peer review. The version of record Angela Moreras, Jere Tolvanen, Chiara Morosinotto, Elsa Bussiere, Jukka Forsman, Robert L Thomson, Choice of nest attributes as a frontline defense against brood parasitism, Behavioral Ecology, Volume 32, Issue 6, November/December 2021, Pages 1285–1295 is available online at: https://doi.org/10.1093/beheco/arab095.
https://rightsstatements.org/vocab/InC/1.0/
https://urn.fi/URN:NBN:fi-fe202201041153
Tiivistelmä
Abstract
Breeding- and nest-site choice is a behavioral strategy often used to counter negative interactions. Site choices before breeding prevent costs of predation and competition but have been neglected in the context of brood parasitism. For hosts of brood parasites, the earlier brood parasitism is prevented in the breeding cycle the lower the future costs. Suitable nest-sites for cavity-nesting common redstarts (Phoenicurus phoenicurus), a host of the common cuckoo (Cuculus canorus), are a limited resource, but their cavity-nesting strategy could potentially deter predators and brood parasites. We altered the entrance size of breeding cavities and investigated redstart nest-site choice and its consequences to nest predation and brood parasitism risk, although accounting for potential interspecific competition for nest sites. We set-up paired nest-boxes and let redstarts choose between 7 cm and 5 cm entrance sizes. Additionally, we monitored occupancy rates in nest-boxes with 3 cm, 5 cm, and 7 cm entrance sizes and recorded brood parasitism and predation events. We found that redstarts preferred to breed in 5 cm entrance size cavities, where brood parasitism was eliminated but nest predation rates were comparable to 7 cm entrance size cavities. Only in 3 cm cavities both, brood parasitism and predation rates were reduced. In contrast to the other cavity-nesting species, redstart settlement was lowest in 3 cm entrance size cavities, potentially suggesting interspecific competition for small entrance size cavities. Nest-site choice based on entrance size could be a frontline defense strategy that redstarts use to reduce brood parasitism.
Kokoelmat
- Avoin saatavuus [32049]