caa a22 4500 605541701 CHVBK 20210128100917.0 cr unu---uuuuu 210128e20150101xx s 000 0 eng 10.1007/s10071-014-0800-x doi (NATIONALLICENCE)springer-10.1007/s10071-014-0800-x Who moved my eggs? An experimental test of the egg arrangement hypothesis for the rejection of brood parasitic eggs [Elektronische Daten] [Daniel Hanley, Peter Samaš, Mark Hauber, Tomáš Grim] Avian brood parasitism is an exceptional reproductive strategy whereby parasites reduce their own costs associated with parental care and impose them on the host parents. Consequently, host species have evolved multiple defensive mechanisms to combat parasitism. The vast majority of research attention to date has examined host defenses to recognize and reject parasitic eggs. The recently proposed "egg arrangement hypothesis” suggests that hosts may not focus solely on individual eggs' features, but instead the overall arrangement of the clutch may also provide a cue that parasitism has occurred. Correlative data revealed that host females maintaining a consistent egg arrangement across the incubation period were more likely to reject foreign egg models than females that did not keep a consistent egg arrangement. Here, we provide the first experimental test of this hypothesis in the European blackbird (Turdus merula). We experimentally parasitized nests such that the egg arrangement was either disrupted or not disrupted. We found no evidence that altered egg arrangement was used as a cue for egg rejection by host females. Therefore, we suggest that females that keep consistent egg arrangement are more likely to eject foreign eggs for other correlated reasons. Thus, egg arrangement does not serve as an independent cue to trigger egg rejection responses to parasitism in this host species. The Author(s), 2014 Blackbird nationallicence Brood parasitism nationallicence Egg arrangement nationallicence Image processing nationallicence Recognition nationallicence Hanley Daniel Department of Zoology and Laboratory of Ornithology, Palacký University, 17. listopadu 50, 77146, Olomouc, Czech Republic aut Samaš Peter Department of Zoology and Laboratory of Ornithology, Palacký University, 17. listopadu 50, 77146, Olomouc, Czech Republic aut Hauber Mark Department of Psychology, Hunter College and the Graduate Center, City University of New York, 695 Park Avenue, 10065, New York, NY, USA aut Grim Tomáš Department of Zoology and Laboratory of Ornithology, Palacký University, 17. listopadu 50, 77146, Olomouc, Czech Republic aut Animal Cognition Springer Berlin Heidelberg 18/1(2015-01-01), 299-305 1435-9448 18:1<299 2015 18 10071 https://doi.org/10.1007/s10071-014-0800-x text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10071-014-0800-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hanley Daniel Department of Zoology and Laboratory of Ornithology, Palacký University, 17. listopadu 50, 77146, Olomouc, Czech Republic aut NATIONALLICENCE 700 1- Samaš Peter Department of Zoology and Laboratory of Ornithology, Palacký University, 17. listopadu 50, 77146, Olomouc, Czech Republic aut NATIONALLICENCE 700 1- Hauber Mark Department of Psychology, Hunter College and the Graduate Center, City University of New York, 695 Park Avenue, 10065, New York, NY, USA aut NATIONALLICENCE 700 1- Grim Tomáš Department of Zoology and Laboratory of Ornithology, Palacký University, 17. listopadu 50, 77146, Olomouc, Czech Republic aut NATIONALLICENCE 773 0- Animal Cognition Springer Berlin Heidelberg 18/1(2015-01-01), 299-305 1435-9448 18:1<299 2015 18 10071