Experimental mate-removal increases the stress response of female house sparrows: the effects of offspring value?

Hormones and Behavior
Adám Z Lendvai, Olivier Chastel

Abstract

Vertebrates secrete elevated levels of glucocorticoids in response to various stressors, which mobilize energetic reserves but concurrently interfere with reproduction. In accordance with life-history theory, recent evidence suggests that the corticosterone response to stress is modulated according to the value of the brood. Since brood value is positively related to parental care, the stress response modulation may be either the consequence of offspring value (e.g. large broods have high fitness potential - the brood value hypothesis) or the consequence of parental workload (e.g. large broods are energetically demanding for the parents - the workload hypothesis). In this experiment, we aimed at experimentally separating the effects of brood value and workload and to confront the latter two hypotheses. To do so, we captured the male parents from breeding pairs of house sparrows (Passer domesticus) and took them in captivity for 48 h. During the absence of males, mate-removed females made more food deliveries than controls (increased workload) but were unable to fully compensate the lack of their mate, thus their chicks were in worse condition (reduced brood value) than control chicks. After the experimental period, mate-removed...Continue Reading

References

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Oct 10, 2007·The Journal of Animal Ecology·Frederic AngelierOlivier Chastel

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Citations

Apr 17, 2012·Hormones and Behavior·András KosztolányiAdám Z Lendvai
Sep 21, 2010·Hormones and Behavior·Adám Z Lendvai, Olivier Chastel
Apr 9, 2009·General and Comparative Endocrinology·Frédéric Angelier, Olivier Chastel
Oct 29, 2008·General and Comparative Endocrinology·Adám Z LendvaiOlivier Chastel
Oct 16, 2015·Biological Reviews of the Cambridge Philosophical Society·Zulima Tablado, Lukas Jenni
Nov 23, 2010·Hormones and Behavior·Aurélie GoutteOlivier Chastel
Jul 28, 2016·General and Comparative Endocrinology·Vincent A ViblancRené Groscolas
Nov 25, 2016·Proceedings. Biological Sciences·Frances Bonier, Paul R Martin
Feb 11, 2011·The Journal of Experimental Biology·Adám Z LendvaiOlivier Chastel
Nov 2, 2014·The Journal of Experimental Biology·Océane Le BotCécilia Houdelier

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