Vol. 36 No. 2 (2021), Articles
Vol. 36 No. 2 (2021)

Alloparental behavior in three Neotropical grebes

Articles
Published 01-12-2021
Ignacio Roesler
Programa Patagonia/Proyecto Macá Tobiano. Aves Argentinas. Matheu 1246, 1249 Buenos Aires, Argentina | Departamento de Ecología, Genética y Evolución - IEGEBA-CONICET, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires. Pabellón II, Ciudad Universitaria, Buenos Aires, Argentina | Programa Biodiversidad y Conservación, Departamento de Análisis de Sistemas Complejos, Fundación Bariloche-CONICET. Av. Bustillo 9500, 8400 Bariloche, Río Negro, Argentina
Andrés De Miguel
Programa Patagonia/Proyecto Macá Tobiano. Aves Argentinas. Matheu 1246, 1249 Buenos Aires, Argentina
Lucía B. Martín
Programa Patagonia/Proyecto Macá Tobiano. Aves Argentinas. Matheu 1246, 1249 Buenos Aires, Argentina
M. Emilia Giusti
Programa Patagonia/Proyecto Macá Tobiano. Aves Argentinas. Matheu 1246, 1249 Buenos Aires, Argentina | Departamento de Ecología, Genética y Evolución - IEGEBA-CONICET, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires. Pabellón II, Ciudad Universitaria, Buenos Aires, Argentina
Robert Willcox
Programa Patagonia/Proyecto Macá Tobiano. Aves Argentinas. Matheu 1246, 1249 Buenos Aires, Argentina
Kaitlin Murphy
Programa Patagonia/Proyecto Macá Tobiano. Aves Argentinas. Matheu 1246, 1249 Buenos Aires, Argentina
Patrick Buchanan
Programa Patagonia/Proyecto Macá Tobiano. Aves Argentinas. Matheu 1246, 1249 Buenos Aires, Argentina
Laura Fasola
Programa Patagonia/Proyecto Macá Tobiano. Aves Argentinas. Matheu 1246, 1249 Buenos Aires, Argentina | CONICET, Delegación Regional Patagonia, Administración de Parques Nacionales. Vicealmirante O’Connor, 8400 Bariloche, Río Negro, Argentina
Juan Carlos Reboreda
Departamento de Ecología, Genética y Evolución - IEGEBA-CONICET, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires. Pabellón II, Ciudad Universitaria, Buenos Aires, Argentina
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Keywords

adoption
alloparental care
creches
Hooded Grebe
Neotropical grebes
Podiceps gallardoi

How to Cite

Roesler, Ignacio, Andrés De Miguel, Lucía B. Martín, M. Emilia Giusti, Robert Willcox, Kaitlin Murphy, Patrick Buchanan, Laura Fasola, and Juan Carlos Reboreda. 2021. “Alloparental Behavior in Three Neotropical Grebes”. El Hornero 36 (2): 65-70. https://doi.org/10.56178/eh.v36i2.371.
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Abstract

Alloparental behavior includes a wide range of situations, from occasional fostering to adoption. It is usually the result of brood parasitism, brood adoption or brood mixing, but also due to nest switching. Interspecific alloparental behaviors are less widespread, but there are no key differences in mechanism of underlying behaviors. Some South American grebes are found sympatrically, and some of them usually reproduce on mixed colonies. Here we describe different conspecific and interspecific alloparental behaviors involving Silvery Grebe (Podiceps occipitalis), White-tufted Grebe (Rollandia rolland) and the critically endangered Hooded Grebe (Podiceps gallardoi). We discuss the implications of temporary adoption and potentially ‘true’ adoption, in particular for Hooded Grebes. Our observations show that alloparental behavior is possibly widespread among Neotropical grebes, and in the case of the Hooded Grebe we hypothesize that alloparental intraspecific feeding of non-related juveniles prior to migration could help to increase juvenile survival.

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