Context-dependent foraging by seed-eating birds does not necessarily mean low ecological predictability

Flexibility of foraging behaviour affects our capacity to predict ecological outputs such as population responses to habitat change. Some birds forage following rules of absolute value of the food item (i.e., absolute valuation). Their realized diet is strongly correlated with the profitability of t...

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Autor principal:	Cueto, Victor Rodolfo
Publicado:	2015
Materias:	Context dependence Ecological predictability Environmental change Feeding experiments Rational food choice food consumption food preference foraging behavior habitat availability passerine profitability Aves Diuca Diuca diuca Saltatricula multicolor Zonotrichia capensis
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00084301_v93_n5_p353_Marone http://hdl.handle.net/20.500.12110/paper_00084301_v93_n5_p353_Marone
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_00084301_v93_n5_p353_Marone
record_format	dspace
spelling	paper:paper_00084301_v93_n5_p353_Marone2023-06-08T14:32:04Z Context-dependent foraging by seed-eating birds does not necessarily mean low ecological predictability Cueto, Victor Rodolfo Context dependence Ecological predictability Environmental change Feeding experiments Rational food choice food consumption food preference foraging behavior habitat availability passerine profitability Aves Diuca Diuca diuca Saltatricula multicolor Zonotrichia capensis Flexibility of foraging behaviour affects our capacity to predict ecological outputs such as population responses to habitat change. Some birds forage following rules of absolute value of the food item (i.e., absolute valuation). Their realized diet is strongly correlated with the profitability of the food item and it is predictable. Consumers, however, do not always follow absolute rules. Opportunistic foragers adjust food consumption based on the availability of the food item. Their diet is still predictable but more elusive. Relativistic or context-dependent foragers change the ranks of food preferences depending on the presence of alternative food options in the choice set. Predicting their contingent diet is particularly difficult. We tested if the context of seed availability affects foraging decisions of three seed-eating bird species (the Rufous-collared Sparrow (Zonotrichia capensis (Statius Muller, 1776)), the Many-colored Chaco Finch (Saltatricula multicolor (Burmeister, 1860)), and the Common Diuca Finch (Diuca diuca (Molina, 1782))) using choice experiments aimed at detecting if seed preferences for two types of target seeds changed according to context. Birds showed very similar rankings of preferences for target seeds; however, preferences for attractive food items were not fixed but often increased in less valuable contexts. Although results imply some degree of context-dependent behaviour, predictability of bird diet was preserved because the ranking of preferences remained mostly unchanged between contexts (and among bird species), and the higher consumption of target grass seeds in a less attractive context was widely expected from the intrinsic properties of the seeds. © 2015(Publisher Name) All Rights Reserved. Fil:Cueto, V.R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2015 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00084301_v93_n5_p353_Marone http://hdl.handle.net/20.500.12110/paper_00084301_v93_n5_p353_Marone
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Context dependence Ecological predictability Environmental change Feeding experiments Rational food choice food consumption food preference foraging behavior habitat availability passerine profitability Aves Diuca Diuca diuca Saltatricula multicolor Zonotrichia capensis
spellingShingle	Context dependence Ecological predictability Environmental change Feeding experiments Rational food choice food consumption food preference foraging behavior habitat availability passerine profitability Aves Diuca Diuca diuca Saltatricula multicolor Zonotrichia capensis Cueto, Victor Rodolfo Context-dependent foraging by seed-eating birds does not necessarily mean low ecological predictability
topic_facet	Context dependence Ecological predictability Environmental change Feeding experiments Rational food choice food consumption food preference foraging behavior habitat availability passerine profitability Aves Diuca Diuca diuca Saltatricula multicolor Zonotrichia capensis
description	Flexibility of foraging behaviour affects our capacity to predict ecological outputs such as population responses to habitat change. Some birds forage following rules of absolute value of the food item (i.e., absolute valuation). Their realized diet is strongly correlated with the profitability of the food item and it is predictable. Consumers, however, do not always follow absolute rules. Opportunistic foragers adjust food consumption based on the availability of the food item. Their diet is still predictable but more elusive. Relativistic or context-dependent foragers change the ranks of food preferences depending on the presence of alternative food options in the choice set. Predicting their contingent diet is particularly difficult. We tested if the context of seed availability affects foraging decisions of three seed-eating bird species (the Rufous-collared Sparrow (Zonotrichia capensis (Statius Muller, 1776)), the Many-colored Chaco Finch (Saltatricula multicolor (Burmeister, 1860)), and the Common Diuca Finch (Diuca diuca (Molina, 1782))) using choice experiments aimed at detecting if seed preferences for two types of target seeds changed according to context. Birds showed very similar rankings of preferences for target seeds; however, preferences for attractive food items were not fixed but often increased in less valuable contexts. Although results imply some degree of context-dependent behaviour, predictability of bird diet was preserved because the ranking of preferences remained mostly unchanged between contexts (and among bird species), and the higher consumption of target grass seeds in a less attractive context was widely expected from the intrinsic properties of the seeds. © 2015(Publisher Name) All Rights Reserved.
author	Cueto, Victor Rodolfo
author_facet	Cueto, Victor Rodolfo
author_sort	Cueto, Victor Rodolfo
title	Context-dependent foraging by seed-eating birds does not necessarily mean low ecological predictability
title_short	Context-dependent foraging by seed-eating birds does not necessarily mean low ecological predictability
title_full	Context-dependent foraging by seed-eating birds does not necessarily mean low ecological predictability
title_fullStr	Context-dependent foraging by seed-eating birds does not necessarily mean low ecological predictability
title_full_unstemmed	Context-dependent foraging by seed-eating birds does not necessarily mean low ecological predictability
title_sort	context-dependent foraging by seed-eating birds does not necessarily mean low ecological predictability
publishDate	2015
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00084301_v93_n5_p353_Marone http://hdl.handle.net/20.500.12110/paper_00084301_v93_n5_p353_Marone
work_keys_str_mv	AT cuetovictorrodolfo contextdependentforagingbyseedeatingbirdsdoesnotnecessarilymeanlowecologicalpredictability
_version_	1768546095185526784

Context-dependent foraging by seed-eating birds does not necessarily mean low ecological predictability

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