Cognitive ecology in hummingbirds: the role of sexual dimorphism and its anatomical correlates on memory.

In scatter-hoarding species, several behavioral and neuroanatomical adaptations allow them to store and retrieve thousands of food items per year. Nectarivorous animals face a similar scenario having to remember quality, location and replenishment schedules of several nectar sources. In the green-ba...

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Autores principales:	Paulina L González-Gómez, Natalia Madrid-Lopez, Juan E Salazar, Rodrigo Suárez, Pablo Razeto-Barry, Jorge Mpodozis, Francisco Bozinovic, Rodrigo A Vásquez
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2014
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/7cc2c07574dc4eb995b047123ffdcdf3
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id	oai:doaj.org-article:7cc2c07574dc4eb995b047123ffdcdf3
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spelling	oai:doaj.org-article:7cc2c07574dc4eb995b047123ffdcdf32021-11-18T08:29:39ZCognitive ecology in hummingbirds: the role of sexual dimorphism and its anatomical correlates on memory.1932-620310.1371/journal.pone.0090165https://doaj.org/article/7cc2c07574dc4eb995b047123ffdcdf32014-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/24599049/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203In scatter-hoarding species, several behavioral and neuroanatomical adaptations allow them to store and retrieve thousands of food items per year. Nectarivorous animals face a similar scenario having to remember quality, location and replenishment schedules of several nectar sources. In the green-backed firecrown hummingbird (Sephanoides sephanoides), males are territorial and have the ability to accurately keep track of nectar characteristics of their defended food sources. In contrast, females display an opportunistic strategy, performing rapid intrusions into males territories. In response, males behave aggressively during the non-reproductive season. In addition, females have higher energetic demands due to higher thermoregulatory costs and travel times. The natural scenario of this species led us to compared cognitive abilities and hippocampal size between males and females. Males were able to remember nectar location and renewal rates significantly better than females. However, the hippocampal formation was significantly larger in females than males. We discuss these findings in terms of sexually dimorphic use of spatial resources and variable patterns of brain dimorphisms in birds.Paulina L González-GómezNatalia Madrid-LopezJuan E SalazarRodrigo SuárezPablo Razeto-BarryJorge MpodozisFrancisco BozinovicRodrigo A VásquezPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 9, Iss 3, p e90165 (2014)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Paulina L González-Gómez Natalia Madrid-Lopez Juan E Salazar Rodrigo Suárez Pablo Razeto-Barry Jorge Mpodozis Francisco Bozinovic Rodrigo A Vásquez Cognitive ecology in hummingbirds: the role of sexual dimorphism and its anatomical correlates on memory.
description	In scatter-hoarding species, several behavioral and neuroanatomical adaptations allow them to store and retrieve thousands of food items per year. Nectarivorous animals face a similar scenario having to remember quality, location and replenishment schedules of several nectar sources. In the green-backed firecrown hummingbird (Sephanoides sephanoides), males are territorial and have the ability to accurately keep track of nectar characteristics of their defended food sources. In contrast, females display an opportunistic strategy, performing rapid intrusions into males territories. In response, males behave aggressively during the non-reproductive season. In addition, females have higher energetic demands due to higher thermoregulatory costs and travel times. The natural scenario of this species led us to compared cognitive abilities and hippocampal size between males and females. Males were able to remember nectar location and renewal rates significantly better than females. However, the hippocampal formation was significantly larger in females than males. We discuss these findings in terms of sexually dimorphic use of spatial resources and variable patterns of brain dimorphisms in birds.
format	article
author	Paulina L González-Gómez Natalia Madrid-Lopez Juan E Salazar Rodrigo Suárez Pablo Razeto-Barry Jorge Mpodozis Francisco Bozinovic Rodrigo A Vásquez
author_facet	Paulina L González-Gómez Natalia Madrid-Lopez Juan E Salazar Rodrigo Suárez Pablo Razeto-Barry Jorge Mpodozis Francisco Bozinovic Rodrigo A Vásquez
author_sort	Paulina L González-Gómez
title	Cognitive ecology in hummingbirds: the role of sexual dimorphism and its anatomical correlates on memory.
title_short	Cognitive ecology in hummingbirds: the role of sexual dimorphism and its anatomical correlates on memory.
title_full	Cognitive ecology in hummingbirds: the role of sexual dimorphism and its anatomical correlates on memory.
title_fullStr	Cognitive ecology in hummingbirds: the role of sexual dimorphism and its anatomical correlates on memory.
title_full_unstemmed	Cognitive ecology in hummingbirds: the role of sexual dimorphism and its anatomical correlates on memory.
title_sort	cognitive ecology in hummingbirds: the role of sexual dimorphism and its anatomical correlates on memory.
publisher	Public Library of Science (PLoS)
publishDate	2014
url	https://doaj.org/article/7cc2c07574dc4eb995b047123ffdcdf3
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Cognitive ecology in hummingbirds: the role of sexual dimorphism and its anatomical correlates on memory.

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