Počet záznamů: 1

The role of blunt egg pole characteristics for recognition of eggs in the song thrush (Turdus philomelos)

  1. 1.
    0340433 - UBO-W 2011 RIV NL eng J - Článek v odborném periodiku
    Polačiková, Lenka - Stokke, B. G. - Procházka, Petr - Honza, Marcel - Moksnes, A. - Roskaft, E.
    The role of blunt egg pole characteristics for recognition of eggs in the song thrush (Turdus philomelos).
    Behaviour. Roč. 147, č. 4 (2010), s. 465-478 ISSN 0005-7959
    Grant CEP: GA ČR(CZ) GD524/05/H536; GA MŠk LC06073
    Výzkumný záměr: CEZ:AV0Z60930519
    Klíčová slova: brood parasitism * egg discrimination * eggshell characteristics * recognition cues * rejection behaviour
    Kód oboru RIV: EG - Zoologie
    Impakt faktor: 1.480, rok: 2010

    Colour and speckling of avian eggshells play important roles in egg recognition behaviour. However, only a few studies have paid attention to whether specific parts of eggs may be more important than others in rejection decisions by hosts. We hypothesised that the blunt pole in song thrush eggs possesses important cues for recognition of own eggs because this is the most visible part of the egg in the nest. We examined host response towards conspecific eggs painted blue either at the blunt or sharp poles, and used unpainted conspecific eggs as a control. We found, as predicted, that the experimental eggs painted blue at the blunt poles were rejected significantly more often than the experimental eggs unpainted at this pole. Rejection rates of experimental eggs were higher with increasing differences in number of spots between the two poles of own eggs. Our results confirmed that the essential cues used for egg discrimination in song thrushes are found at the blunt egg pole.
    Trvalý link: http://hdl.handle.net/11104/0183666