Parasitic egg rejection decisions of chalk-browed mockingbirds Mimus saturninus are independent of clutch composition

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Obligate avian brood parasites lay their eggs in nests of other host species, which assume all the costs of parental care for the foreign eggs and chicks. The most common defensive response to parasitism is the rejection of foreign eggs by hosts. Different cognitive mechanisms and decision-making ru...

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Autores principales:	de la Colina, M.A., Pompilio, L., Hauber, M.E., Reboreda, J.C., Mahler, B.
Formato:	JOUR
Materias:	Brood parasitism Chalk-browed mockingbird Cognitive mechanism Egg rejection Shiny cowbird animal cognition decision making female host parasite interaction male nesting ovum parasitology Passeriformes physiology Animals Cognition Decision Making Female Host-Parasite Interactions Male Nesting Behavior Ovum
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_14359448_v21_n2_p301_delaColina
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_14359448_v21_n2_p301_delaColina
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spelling	todo:paper_14359448_v21_n2_p301_delaColina2023-10-03T16:15:54Z Parasitic egg rejection decisions of chalk-browed mockingbirds Mimus saturninus are independent of clutch composition de la Colina, M.A. Pompilio, L. Hauber, M.E. Reboreda, J.C. Mahler, B. Brood parasitism Chalk-browed mockingbird Cognitive mechanism Egg rejection Shiny cowbird animal cognition decision making female host parasite interaction male nesting ovum parasitology Passeriformes physiology Animals Cognition Decision Making Female Host-Parasite Interactions Male Nesting Behavior Ovum Passeriformes Obligate avian brood parasites lay their eggs in nests of other host species, which assume all the costs of parental care for the foreign eggs and chicks. The most common defensive response to parasitism is the rejection of foreign eggs by hosts. Different cognitive mechanisms and decision-making rules may guide both egg recognition and rejection behaviors. Classical optimization models generally assume that decisions are based on the absolute properties of the options (i.e., absolute valuation). Increasing evidence shows instead that hosts’ rejection decisions also depend on the context in which options are presented (i.e., context-dependent valuation). Here we study whether the chalk-browed mockingbird’s (Mimus saturninus) rejection of parasitic shiny cowbird (Molothrus bonariensis) eggs is a fixed behavior or varies with the context of the clutch. We tested three possible context-dependent mechanisms: (1) range effect, (2) habituation to variation, and (3) sensitization to variation. We found that mockingbird rejection of parasitic eggs does not change according to the characteristics of the other eggs in the nest. Thus, rejection decisions may exclusively depend on the objective characteristics of the eggs, meaning that the threshold of acceptance or rejection of a foreign egg is context-independent in this system. © 2018, Springer-Verlag GmbH Germany, part of Springer Nature. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_14359448_v21_n2_p301_delaColina
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Brood parasitism Chalk-browed mockingbird Cognitive mechanism Egg rejection Shiny cowbird animal cognition decision making female host parasite interaction male nesting ovum parasitology Passeriformes physiology Animals Cognition Decision Making Female Host-Parasite Interactions Male Nesting Behavior Ovum Passeriformes
spellingShingle	Brood parasitism Chalk-browed mockingbird Cognitive mechanism Egg rejection Shiny cowbird animal cognition decision making female host parasite interaction male nesting ovum parasitology Passeriformes physiology Animals Cognition Decision Making Female Host-Parasite Interactions Male Nesting Behavior Ovum Passeriformes de la Colina, M.A. Pompilio, L. Hauber, M.E. Reboreda, J.C. Mahler, B. Parasitic egg rejection decisions of chalk-browed mockingbirds Mimus saturninus are independent of clutch composition
topic_facet	Brood parasitism Chalk-browed mockingbird Cognitive mechanism Egg rejection Shiny cowbird animal cognition decision making female host parasite interaction male nesting ovum parasitology Passeriformes physiology Animals Cognition Decision Making Female Host-Parasite Interactions Male Nesting Behavior Ovum Passeriformes
description	Obligate avian brood parasites lay their eggs in nests of other host species, which assume all the costs of parental care for the foreign eggs and chicks. The most common defensive response to parasitism is the rejection of foreign eggs by hosts. Different cognitive mechanisms and decision-making rules may guide both egg recognition and rejection behaviors. Classical optimization models generally assume that decisions are based on the absolute properties of the options (i.e., absolute valuation). Increasing evidence shows instead that hosts’ rejection decisions also depend on the context in which options are presented (i.e., context-dependent valuation). Here we study whether the chalk-browed mockingbird’s (Mimus saturninus) rejection of parasitic shiny cowbird (Molothrus bonariensis) eggs is a fixed behavior or varies with the context of the clutch. We tested three possible context-dependent mechanisms: (1) range effect, (2) habituation to variation, and (3) sensitization to variation. We found that mockingbird rejection of parasitic eggs does not change according to the characteristics of the other eggs in the nest. Thus, rejection decisions may exclusively depend on the objective characteristics of the eggs, meaning that the threshold of acceptance or rejection of a foreign egg is context-independent in this system. © 2018, Springer-Verlag GmbH Germany, part of Springer Nature.
format	JOUR
author	de la Colina, M.A. Pompilio, L. Hauber, M.E. Reboreda, J.C. Mahler, B.
author_facet	de la Colina, M.A. Pompilio, L. Hauber, M.E. Reboreda, J.C. Mahler, B.
author_sort	de la Colina, M.A.
title	Parasitic egg rejection decisions of chalk-browed mockingbirds Mimus saturninus are independent of clutch composition
title_short	Parasitic egg rejection decisions of chalk-browed mockingbirds Mimus saturninus are independent of clutch composition
title_full	Parasitic egg rejection decisions of chalk-browed mockingbirds Mimus saturninus are independent of clutch composition
title_fullStr	Parasitic egg rejection decisions of chalk-browed mockingbirds Mimus saturninus are independent of clutch composition
title_full_unstemmed	Parasitic egg rejection decisions of chalk-browed mockingbirds Mimus saturninus are independent of clutch composition
title_sort	parasitic egg rejection decisions of chalk-browed mockingbirds mimus saturninus are independent of clutch composition
url	http://hdl.handle.net/20.500.12110/paper_14359448_v21_n2_p301_delaColina
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_version_	1807321368148049920

Parasitic egg rejection decisions of chalk-browed mockingbirds Mimus saturninus are independent of clutch composition

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