Foraging efficiency of Akodon azarae under different plant cover and resource levels

The goal of this work was to determine how the foraging behaviour of Akodon azarae changes with predation risk and food availability in cropfield borders of Buenos Aires, Argentina. Our hypotheses were that A. azarae has a greater foraging efficiency in safe areas than in risky ones and that the for...

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Detalles Bibliográficos
Autores principales: Fraschina, J., Knight, C., Busch, M.
Formato: JOUR
Materias:
Constraints
Foraging efficiency
Giving-up density
Predation risk
Rodent
Akodon azarae
Rodentia
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_02890771_v27_n3_p447_Fraschina
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_02890771_v27_n3_p447_Fraschina
record_format dspace
spelling todo:paper_02890771_v27_n3_p447_Fraschina2023-10-03T15:17:17Z Foraging efficiency of Akodon azarae under different plant cover and resource levels Fraschina, J. Knight, C. Busch, M. Constraints Foraging efficiency Giving-up density Predation risk Rodent Akodon azarae Rodentia The goal of this work was to determine how the foraging behaviour of Akodon azarae changes with predation risk and food availability in cropfield borders of Buenos Aires, Argentina. Our hypotheses were that A. azarae has a greater foraging efficiency in safe areas than in risky ones and that the foraging behaviour of A. azarae also depends on the level of resources. We measured giving-up densities (GUDs) and food consumption twice a year in artificial foraging patches (bottles with known amounts of millet seed) in covered and open areas and with two different levels of seed abundance. In both periods, GUDs were lower in the covered areas than in the open ones independently of food level. Consumption increased with food level in covered areas but not in open areas. Based on these results, we conclude that A. azarae appears to maximize its consumption depending on predation risk. © Japan Ethological Society and Springer 2009. Fil:Fraschina, J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Knight, C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Busch, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_02890771_v27_n3_p447_Fraschina
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Constraints
Foraging efficiency
Giving-up density
Predation risk
Rodent
Akodon azarae
Rodentia
spellingShingle Constraints
Foraging efficiency
Giving-up density
Predation risk
Rodent
Akodon azarae
Rodentia
Fraschina, J.
Knight, C.
Busch, M.
Foraging efficiency of Akodon azarae under different plant cover and resource levels
topic_facet Constraints
Foraging efficiency
Giving-up density
Predation risk
Rodent
Akodon azarae
Rodentia
description The goal of this work was to determine how the foraging behaviour of Akodon azarae changes with predation risk and food availability in cropfield borders of Buenos Aires, Argentina. Our hypotheses were that A. azarae has a greater foraging efficiency in safe areas than in risky ones and that the foraging behaviour of A. azarae also depends on the level of resources. We measured giving-up densities (GUDs) and food consumption twice a year in artificial foraging patches (bottles with known amounts of millet seed) in covered and open areas and with two different levels of seed abundance. In both periods, GUDs were lower in the covered areas than in the open ones independently of food level. Consumption increased with food level in covered areas but not in open areas. Based on these results, we conclude that A. azarae appears to maximize its consumption depending on predation risk. © Japan Ethological Society and Springer 2009.
format JOUR
author Fraschina, J.
Knight, C.
Busch, M.
author_facet Fraschina, J.
Knight, C.
Busch, M.
author_sort Fraschina, J.
title Foraging efficiency of Akodon azarae under different plant cover and resource levels
title_short Foraging efficiency of Akodon azarae under different plant cover and resource levels
title_full Foraging efficiency of Akodon azarae under different plant cover and resource levels
title_fullStr Foraging efficiency of Akodon azarae under different plant cover and resource levels
title_full_unstemmed Foraging efficiency of Akodon azarae under different plant cover and resource levels
title_sort foraging efficiency of akodon azarae under different plant cover and resource levels
url http://hdl.handle.net/20.500.12110/paper_02890771_v27_n3_p447_Fraschina
work_keys_str_mv AT fraschinaj foragingefficiencyofakodonazaraeunderdifferentplantcoverandresourcelevels
AT knightc foragingefficiencyofakodonazaraeunderdifferentplantcoverandresourcelevels
AT buschm foragingefficiencyofakodonazaraeunderdifferentplantcoverandresourcelevels
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