Experimentally provided conspecific cues boost bird territory density but not breeding performance

Grendelmeier, Alexander; Arlettaz, Raphaël; Olano-Marin, Juanita; Pasinelli, Gilberto (2017). Experimentally provided conspecific cues boost bird territory density but not breeding performance. Behavioral Ecology, 28(1), pp. 174-185. Oxford University Press 10.1093/beheco/arw144

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Decision-making during different life-history stages requires information, which is obtained through own or others’ experience and interaction with the environment. In birds, song is important for territory defense and mate attraction. Although song has evolved to purposely convey information, it can be inadvertently exploited by conspecifics. Experiments attempting to attract focal species by playing back their song are numerous, yet the consequences for reproductive performance remain little understood. In 2013 and 2014, settlement, reproduction, and extrapair paternity of Phylloscopus sibilatrix were assessed in a randomized experiment. We hypothesized that territory number, reproductive performance, and extrapair paternity would be higher on song plots (wood warbler song playbacks during prebreeding periods) than on control plots (no wood warbler song playback). On song plots, 3 times more territories were established, settlement occurred faster, and maximum plot occupancy was higher compared with control plots. Pairing rate, daily nest survival rate, mean clutch size, mean number of nestlings and fledglings, rates of extrapair young, nest abandonment, and nest predation did not differ between treatments, but fledging success was lower on song plots compared with control plots. This study shows the important role social cues can play for territory selection of birds, but also exemplifies the necessity for postattraction evaluation of reproduction to rule out negative effects of artificial attraction. Decreased fledging success on song plots and ambiguity about consequences of artificial attraction for distribution and settling dynamics of the species give reason to further evaluate whether acoustic attraction represents a suitable method for songbird conservation.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Department of Biology > Institute of Ecology and Evolution (IEE) > Conservation Biology
08 Faculty of Science > Department of Biology > Institute of Ecology and Evolution (IEE)

UniBE Contributor:

Grendelmeier, Alexander and Arlettaz, Raphaël

Subjects:

500 Science > 570 Life sciences; biology
500 Science > 590 Animals (Zoology)

ISSN:

1045-2249

Publisher:

Oxford University Press

Language:

English

Submitter:

Olivier Roth

Date Deposited:

18 Apr 2018 08:43

Last Modified:

18 Apr 2018 08:43

Publisher DOI:

10.1093/beheco/arw144

BORIS DOI:

10.7892/boris.110645

URI:

https://boris.unibe.ch/id/eprint/110645

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