| POLAČIKOVÁ, Lenka, Marcel HONZA, Petr PROCHÁZKA, Ján TOPERCER a Bard G. STOKKE. Colour characteristics of the blunt egg pole: cues for recognition of parasitic eggs as revealed by reflectance spectrophotometry. Animal Behaviour. Academic Press, 2007, roč. 74, č. 3, s. 419;427, 9 s. ISSN 0003-3472. |
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@article{775955,
author = {Polačiková, Lenka and Honza, Marcel and Procházka, Petr and Topercer, Ján and Stokke, Bard G.},
article_number = {3},
keywords = {blackcap; brood parasitism; recognition cues; reflectance spectrophotometry; rejection behaviour},
language = {eng},
issn = {0003-3472},
journal = {Animal Behaviour},
title = {Colour characteristics of the blunt egg pole: cues for recognition of parasitic eggs as revealed by reflectance spectrophotometry},
volume = {74},
year = {2007}
}
TY - JOUR
ID - 775955
AU - Polačiková, Lenka - Honza, Marcel - Procházka, Petr - Topercer, Ján - Stokke, Bard G.
PY - 2007
TI - Colour characteristics of the blunt egg pole: cues for recognition of parasitic eggs as revealed by reflectance spectrophotometry
JF - Animal Behaviour
VL - 74
IS - 3
SP - 419;427
EP - 419;427
PB - Academic Press
SN - 00033472
KW - blackcap
KW - brood parasitism
KW - recognition cues
KW - reflectance spectrophotometry
KW - rejection behaviour
N2 - We examined the role of colour characteristics in the egg recognition in blackcaps (Sylvia atricapilla). Multivariate analyses of spectrophotometric data revealed that the likelihood of egg rejection significantly increased with decreasing intraclutch variation in blue chroma. Furthermore, probability of egg rejection significantly increased with decreasing contrast between parasitic and host eggs in UV wavelengths and with decreasing brightness of host eggs at the blunt egg pole. Accepted foreign eggs were significantly darker at the blunt pole than acceptors’ own eggs. The paradox that rejected eggs had lower contrast could be explained by the fact that the contrast in UV spectrum is associated with brightness of the blunt egg part. Our data suggest that colour characteristics of the blunt egg part may play a major role in the recognition of parasitic eggs in the blackcaps.
ER -
POLAČIKOVÁ, Lenka, Marcel HONZA, Petr PROCHÁZKA, Ján TOPERCER a Bard G. STOKKE. Colour characteristics of the blunt egg pole: cues for recognition of parasitic eggs as revealed by reflectance spectrophotometry. \textit{Animal Behaviour}. Academic Press, 2007, roč.~74, č.~3, s.~419;427, 9 s. ISSN~0003-3472.
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