RiouxPelletierGarantEtAl2014

Référence

Rioux Paquette, S., Pelletier, F., Garant, D. and Belisle, M. (2014) Severe recent decrease of adult body mass in a declining insectivorous bird population. Proceedings of the Royal Society B-Biological Sciences, 281(1786). (Scopus )

Résumé

Migratory bird species that feed on air-borne insects are experiencing widespread regional declines, but these remain poorly understood. Agricultural intensification in the breeding range is often regarded as one of the main drivers of these declines. Here, we tested the hypothesis that body mass in breeding individuals should reflect habitat quality in an aerial insectivore, the tree swallow (Tachycineta bicolor), along a gradient of agricultural intensity. Our dataset was collected over 7 years (2005-2011) and included 2918 swallow captures and 1483 broods. Analyses revealed a substantial decline of the population over the course of the study (219% occupancy rate), mirrored by decreasing body mass. This trend was especially severe in females, representing a total loss of 8% of their mass. Reproductive success was negatively influenced by intensive agriculture, but did not decrease over time. Interestingly, variation in body mass was independent of breeding habitat quality, leading us to suggest that this decline in body mass may result from carry-over effects from non-breeding areas and affect population dynamics through reduced survival. This work contributes to the growing body of evidence suggesting that declines in migratory aerial insectivores are driven by multiple, complex factors requiring better knowledge of year-round habitat use. © 2014 The Authors Published by the Royal Society. All rights reserved.

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@ARTICLE { RiouxPelletierGarantEtAl2014,
    AUTHOR = { Rioux Paquette, S. and Pelletier, F. and Garant, D. and Belisle, M. },
    TITLE = { Severe recent decrease of adult body mass in a declining insectivorous bird population },
    JOURNAL = { Proceedings of the Royal Society B-Biological Sciences },
    YEAR = { 2014 },
    VOLUME = { 281 },
    NUMBER = { 1786 },
    NOTE = { cited By (since 1996)0 },
    ABSTRACT = { Migratory bird species that feed on air-borne insects are experiencing widespread regional declines, but these remain poorly understood. Agricultural intensification in the breeding range is often regarded as one of the main drivers of these declines. Here, we tested the hypothesis that body mass in breeding individuals should reflect habitat quality in an aerial insectivore, the tree swallow (Tachycineta bicolor), along a gradient of agricultural intensity. Our dataset was collected over 7 years (2005-2011) and included 2918 swallow captures and 1483 broods. Analyses revealed a substantial decline of the population over the course of the study (219% occupancy rate), mirrored by decreasing body mass. This trend was especially severe in females, representing a total loss of 8% of their mass. Reproductive success was negatively influenced by intensive agriculture, but did not decrease over time. Interestingly, variation in body mass was independent of breeding habitat quality, leading us to suggest that this decline in body mass may result from carry-over effects from non-breeding areas and affect population dynamics through reduced survival. This work contributes to the growing body of evidence suggesting that declines in migratory aerial insectivores are driven by multiple, complex factors requiring better knowledge of year-round habitat use. © 2014 The Authors Published by the Royal Society. All rights reserved. },
    AUTHOR_KEYWORDS = { Aerial insectivores; Agricultural intensification; Body mass; Breeding success; Phenotypic plasticity; Tree swallow },
    CODEN = { PRLBA },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.1098/rspb.2014.0649 },
    ISSN = { 14712954 },
    KEYWORDS = { adult; agricultural intensification; body mass; data set; habitat quality; habitat use; hypothesis testing; insectivore; nature-society relations; passerine; population decline; reproductive success; survival },
    SOURCE = { Scopus },
    URL = { http://www.scopus.com/inward/record.url?eid=2-s2.0-84902687848&partnerID=40&md5=db08c35db9de67086a08c47bbad9a480 },
}

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