Počet záznamů: 1

Blue-green eggshell coloration is not a sexually selected signal of female quality in an open-nesting polygynous passerine

  1. 1.
    0358873 - UBO-W 2012 RIV DE eng J - Článek v odborném periodiku
    Honza, Marcel - Požgayová, Milica - Procházka, Petr - Cherry, M. I.
    Blue-green eggshell coloration is not a sexually selected signal of female quality in an open-nesting polygynous passerine.
    Naturwissenschaften. Roč. 98, č. 6 (2011), s. 493-499 ISSN 0028-1042
    Grant CEP: GA AV ČR IAA600930605; GA AV ČR IAA600930903; GA MŠk LC06073
    Výzkumný záměr: CEZ:AV0Z60930519
    Klíčová slova: Acrocephalus arundinaceus * Blue-green chroma * Egg colour * Female condition * Great reed warbler * Polygyny
    Kód oboru RIV: EG - Zoologie
    Impakt faktor: 2.278, rok: 2011

    Here we tested two main assumptions of the sexually selected egg coloration hypothesis: (1) whether the intensity of eggshell blue-green chroma (BGC) reflects female quality; and (2) whether males make their decisions on the level of parental care according to the intensity of eggshell BGC. In the polygynous study species, the great reed warbler, females simultaneously paired with the same male, compete for his nest attendance and could benefit from signalling their quality through egg coloration. However, we found no association between the variation in eggshell BGC and measures of female quality. Moreover, males did not adjust their investment in nest defence in relation to the eggshell BGC. We conclude that blue-green egg coloration in this open-nesting passerine is unlikely to have a signalling function. Rather, the large colour variation among clutches of individual females may depend on yearly fluctuations in environmental conditions.
    Trvalý link: http://hdl.handle.net/11104/0196789