Dépôt numérique

Inadvertent social information in breeding site selection of natal dispersing birds.

Nocera, Joseph J.; Forbes, Graham J.; Giraldeau, Luc-Alain (2006). Inadvertent social information in breeding site selection of natal dispersing birds. Proceedings of the Royal Society B: Biological Sciences , vol. 273 , nº 1584. p. 349-355. DOI: 10.1098/rspb.2005.3318.

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Several species use the number of young produced as public information (PI) to assess breeding site quality. PI is inaccessible for synchronously breeding birds because nests are empty by the time the young can collect this information. We investigate if location cues are the next best source of inadvertent social information (ISI) used by young prospectors during breeding site choice. We experimentally deployed ISI as decoys and song playbacks of breeding males in suitable and sub-optimal habitats during pre- and post-breeding periods, and monitored territory establishment during the subsequent breeding season for a social, bobolink (Dolichonyx oryzivorus), and a more solitary species, Nelson's sharp-tailed sparrow (Ammodramus nelsoni ). The sparrows did not respond to treatments, but bobolinks responded strongly to post-breeding location cues, irrespective of habitat quality. The following year, 17/20 sub-optimal plots to which bobolink males were recruited were defended for at least two weeks, indicating that song heard the previous year could exert a 'carry-over attraction' effect on conspecifics the following year. Sixteen recruited males were natal dispersers, as expected when animals have little opportunity to directly sample their natal habitat quality. We suggest that differences in breeding synchronicity may induce an equivalent clinal distribution of ISI use.

Type de document: Article
Mots-clés libres: conspecific attraction; dispersal; habitat selection; inadvertent social information; prospecting; public information
Centre: Institut national de la recherche scientifique
Date de dépôt: 02 mai 2018 18:09
Dernière modification: 02 mai 2018 18:09
URI: http://espace.inrs.ca/id/eprint/7067

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