Which egg features predict egg rejection responses in American robins? Replicating Rothstein's (1982) study

Rothstein (Behavioral Ecology and Sociobiology, 11, 1982, 229) was one of the first comprehensive studies to examine how different egg features influence egg rejection behaviors of avian brood parasite–hosts. The methods and conclusions of Rothstein (1982) laid the foundation for subsequent experime...

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Autores principales:	Luro, A.B., Igic, B., Croston, R., López, A.V., Shawkey, M.D., Hauber, M.E.
Formato:	JOUR
Materias:	avian brood parasitism egg recognition Molothrus ater Turdus migratorius
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_20457758_v8_n3_p1673_Luro
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_20457758_v8_n3_p1673_Luro
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spelling	todo:paper_20457758_v8_n3_p1673_Luro2023-10-03T16:38:36Z Which egg features predict egg rejection responses in American robins? Replicating Rothstein's (1982) study Luro, A.B. Igic, B. Croston, R. López, A.V. Shawkey, M.D. Hauber, M.E. avian brood parasitism egg recognition Molothrus ater Turdus migratorius Rothstein (Behavioral Ecology and Sociobiology, 11, 1982, 229) was one of the first comprehensive studies to examine how different egg features influence egg rejection behaviors of avian brood parasite–hosts. The methods and conclusions of Rothstein (1982) laid the foundation for subsequent experimental brood parasitism studies over the past thirty years, but its results have never been evaluated with replication. Here, we partially replicated Rothstein's (1982) experiments using parallel artificial model egg treatments to simulate cowbird (Molothrus ater) parasitism in American robin (Turdus migratorius) nests. We compared our data with those of Rothstein (1982) and confirmed most of its original findings: (1) robins reject model eggs that differ from the appearance of a natural robin egg toward that of a natural cowbird egg in background color, size, and maculation; (2) rejection responses were best predicted by model egg background color; and (3) model eggs differing by two or more features from natural robin eggs were more likely to be rejected than model eggs differing by one feature alone. In contrast with Rothstein's (1982) conclusion that American robin egg recognition is not specifically tuned toward rejection of brown-headed cowbird eggs, we argue that our results and those of other recent studies of robin egg rejection suggest a discrimination bias toward rejection of cowbird eggs. Future work on egg recognition will benefit from utilizing a range of model eggs varying continuously in background color, maculation patterning, and size in combination with avian visual modeling, rather than using model eggs which vary only discretely. © 2017 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_20457758_v8_n3_p1673_Luro
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	avian brood parasitism egg recognition Molothrus ater Turdus migratorius
spellingShingle	avian brood parasitism egg recognition Molothrus ater Turdus migratorius Luro, A.B. Igic, B. Croston, R. López, A.V. Shawkey, M.D. Hauber, M.E. Which egg features predict egg rejection responses in American robins? Replicating Rothstein's (1982) study
topic_facet	avian brood parasitism egg recognition Molothrus ater Turdus migratorius
description	Rothstein (Behavioral Ecology and Sociobiology, 11, 1982, 229) was one of the first comprehensive studies to examine how different egg features influence egg rejection behaviors of avian brood parasite–hosts. The methods and conclusions of Rothstein (1982) laid the foundation for subsequent experimental brood parasitism studies over the past thirty years, but its results have never been evaluated with replication. Here, we partially replicated Rothstein's (1982) experiments using parallel artificial model egg treatments to simulate cowbird (Molothrus ater) parasitism in American robin (Turdus migratorius) nests. We compared our data with those of Rothstein (1982) and confirmed most of its original findings: (1) robins reject model eggs that differ from the appearance of a natural robin egg toward that of a natural cowbird egg in background color, size, and maculation; (2) rejection responses were best predicted by model egg background color; and (3) model eggs differing by two or more features from natural robin eggs were more likely to be rejected than model eggs differing by one feature alone. In contrast with Rothstein's (1982) conclusion that American robin egg recognition is not specifically tuned toward rejection of brown-headed cowbird eggs, we argue that our results and those of other recent studies of robin egg rejection suggest a discrimination bias toward rejection of cowbird eggs. Future work on egg recognition will benefit from utilizing a range of model eggs varying continuously in background color, maculation patterning, and size in combination with avian visual modeling, rather than using model eggs which vary only discretely. © 2017 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd.
format	JOUR
author	Luro, A.B. Igic, B. Croston, R. López, A.V. Shawkey, M.D. Hauber, M.E.
author_facet	Luro, A.B. Igic, B. Croston, R. López, A.V. Shawkey, M.D. Hauber, M.E.
author_sort	Luro, A.B.
title	Which egg features predict egg rejection responses in American robins? Replicating Rothstein's (1982) study
title_short	Which egg features predict egg rejection responses in American robins? Replicating Rothstein's (1982) study
title_full	Which egg features predict egg rejection responses in American robins? Replicating Rothstein's (1982) study
title_fullStr	Which egg features predict egg rejection responses in American robins? Replicating Rothstein's (1982) study
title_full_unstemmed	Which egg features predict egg rejection responses in American robins? Replicating Rothstein's (1982) study
title_sort	which egg features predict egg rejection responses in american robins? replicating rothstein's (1982) study
url	http://hdl.handle.net/20.500.12110/paper_20457758_v8_n3_p1673_Luro
work_keys_str_mv	AT luroab whicheggfeaturespredicteggrejectionresponsesinamericanrobinsreplicatingrothsteins1982study AT igicb whicheggfeaturespredicteggrejectionresponsesinamericanrobinsreplicatingrothsteins1982study AT crostonr whicheggfeaturespredicteggrejectionresponsesinamericanrobinsreplicatingrothsteins1982study AT lopezav whicheggfeaturespredicteggrejectionresponsesinamericanrobinsreplicatingrothsteins1982study AT shawkeymd whicheggfeaturespredicteggrejectionresponsesinamericanrobinsreplicatingrothsteins1982study AT hauberme whicheggfeaturespredicteggrejectionresponsesinamericanrobinsreplicatingrothsteins1982study
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Which egg features predict egg rejection responses in American robins? Replicating Rothstein's (1982) study

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