DarveauGauthierDesgrangesEtAl1993

Référence

Darveau, M., Gauthier, G., Desgranges, J.L. and Mauffette, Y. (1993) Nesting success, nest sites, and parental care of the least flycatcher in declining maple forests. Canadian Journal of Zoology, 71(8):1592-1601.

Résumé

Empidonax minimus were studied in healthy and declining sugar maple Acer saccharum stands in S Quebec. Decline had caused a 20-30% foliage loss. Nesting success averaged 53% and did not differ between healthy and declining sites. Nests were located in larger trees in declining sites; foliage loss in the canopy above the nest was twice as high as in healthy sites. Nestling feeding frequency was significantly higher in declining sites. Mean meal size did not differ between sites, suggesting that nestlings received more food in affected stands despite lower insect abundance. The nestling diet was principally Lepidoptera, Diptera, Hymenoptera, and Coleoptera. Parents spent more time at the nest in declining sites in 1988, presumably because of increased brooding demand resulting from cold weather that year. Nestlings were probably thermally stressed in declining sites because of canopy foliage loss and parents had to work more to maintain breeding success. -from Authors

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@ARTICLE { DarveauGauthierDesgrangesEtAl1993,
    AUTHOR = { Darveau, M. and Gauthier, G. and Desgranges, J.L. and Mauffette, Y. },
    TITLE = { Nesting success, nest sites, and parental care of the least flycatcher in declining maple forests },
    JOURNAL = { Canadian Journal of Zoology },
    YEAR = { 1993 },
    VOLUME = { 71 },
    PAGES = { 1592-1601 },
    NUMBER = { 8 },
    NOTE = { 00084301 (ISSN) Cited By (since 1996): 11 Export Date: 25 April 2007 Source: Scopus Language of Original Document: English },
    ABSTRACT = { Empidonax minimus were studied in healthy and declining sugar maple Acer saccharum stands in S Quebec. Decline had caused a 20-30% foliage loss. Nesting success averaged 53% and did not differ between healthy and declining sites. Nests were located in larger trees in declining sites; foliage loss in the canopy above the nest was twice as high as in healthy sites. Nestling feeding frequency was significantly higher in declining sites. Mean meal size did not differ between sites, suggesting that nestlings received more food in affected stands despite lower insect abundance. The nestling diet was principally Lepidoptera, Diptera, Hymenoptera, and Coleoptera. Parents spent more time at the nest in declining sites in 1988, presumably because of increased brooding demand resulting from cold weather that year. Nestlings were probably thermally stressed in declining sites because of canopy foliage loss and parents had to work more to maintain breeding success. -from Authors },
    KEYWORDS = { least flycatcher nesting success parental care sugar maple Canada, Quebec Acer saccharum Empidonax minimus },
    OWNER = { brugerolles },
    TIMESTAMP = { 2007.12.05 },
}

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