Spatio-temporal variability in the feeding strategy of Andean rodents: the role of ambient temperature and food availability

Autores
Ruperto, Emmanuel Fabián; Menéndez, Josefina; Taraborelli, Paula Andrea; Dacar, María Ana; Sassi, Paola Lorena
Año de publicación
2023
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Animals' diets reflect the morpho-physiological and behavioral responses used to obtain nutrients and energy. While optimal foraging theory predicts them in terms of food availability, the obligatory heat model (OHM) predicts them based on ambient temperature, which affects the activity and/or size of the digestive organs, influencing food digestibility. In the highlands of central-west Argentina, rodent diversity is dominated by Phyllotis vaccarum, Abrothrix andina, Akodon oenos, and Euneomys sp. that coexist in different sections of their elevational ranges. Although these species' diets are relatively flexible, it is unclear how temperature and food availability influence their constitution. To unveil this, we explored their feeding strategies at different elevations (1700, 2300, and 3100 m a.s.l.) and seasons (winter and spring-summer). By examining fecal samples, we quantified the intake of vegetative parts of plants, seeds, and arthropods. Abrothrix andina was insectivorous at 2300 m and omnivorous at 3100 m a.s.l. in line with the OHM predictions, suggesting a higher plant consumption derived from an increased capacity of digestive organs, favored by lower temperatures at higher elevations. Phyllotis vaccarum was herbivorous at all elevations, independently of food supply or temperature conditions. However, the secondary food choice occurred in line with the OHM predictions, suggesting a certain degree of digestive adjustment to ambient temperature. Akodon oenos, which was only captured at 2300 m, was insectivorous, whereas Euneomys sp., which was only present at 3100 m, was a specialist herbivore. We detected no seasonal variation in the feeding strategies of the rodents examined. Intraspecifically, thermoregulatory demands would influence the variation in feeding strategies at the elevational gradient, whereas nutritional requirements would explain their consistency between seasons. Interspecifically, we found that diet dissimilarity was relatively high, mainly at high elevations and during winter, which could facilitate species coexistence.
EEA Barrow
Fil: Ruperto, Emmanuel F. Consejo Nacional de Investigaciones Científicas y Técnicas. CCT-Mendoza. Instituto Argentino de Investigaciones de Zonas Áridas. Ecología Integrativa de Fauna Silvestre; Argentina
Fil: Menéndez, Josefina. Consejo Nacional de Investigaciones Científicas y Técnicas. CCT-Mendoza. Instituto Argentino de Investigaciones de Zonas Áridas. Ecología Integrativa de Fauna Silvestre; Argentina
Fil: Taraborelli, Paula Andrea. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Barrow; Argentina
Fil: Taraborelli, Paula Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Dacar, María Ana. Consejo Nacional de Investigaciones Científicas y Técnicas. CCT-Mendoza. Instituto Argentino de Investigaciones de Zonas Áridas. Ecología Integrativa de Fauna Silvestre; Argentina
Fil: Sassi, Paola L. Consejo Nacional de Investigaciones Científicas y Técnicas. CCT-Mendoza. Instituto Argentino de Investigaciones de Zonas Áridas. Ecología Integrativa de Fauna Silvestre; Argentina
Fil: Sassi, Paola L. Universidad Nacional de Cuyo. Facultad de Ciencias Exactas y Naturales; Argentina
Fuente
Mammal Research : 1-15 (Published: 13 May 2023)
Materia
Roedores
Alimentación de los Animales
Temperatura
Suministro de Alimentos
Dieta
Rodents
Animal Feeding
Temperature
Food Supply
Diet
Disponibilidad de Alimentos
Región Andina
Food Availability
Nivel de accesibilidad
acceso restringido
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
INTA Digital (INTA)
Institución
Instituto Nacional de Tecnología Agropecuaria
OAI Identificador
oai:localhost:20.500.12123/14630
Acceder
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oai_identifier_str oai:localhost:20.500.12123/14630
network_acronym_str INTADig
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network_name_str INTA Digital (INTA)
spelling Spatio-temporal variability in the feeding strategy of Andean rodents: the role of ambient temperature and food availabilityRuperto, Emmanuel FabiánMenéndez, JosefinaTaraborelli, Paula AndreaDacar, María AnaSassi, Paola LorenaRoedoresAlimentación de los AnimalesTemperaturaSuministro de AlimentosDietaRodentsAnimal FeedingTemperatureFood SupplyDietDisponibilidad de AlimentosRegión AndinaFood AvailabilityAnimals' diets reflect the morpho-physiological and behavioral responses used to obtain nutrients and energy. While optimal foraging theory predicts them in terms of food availability, the obligatory heat model (OHM) predicts them based on ambient temperature, which affects the activity and/or size of the digestive organs, influencing food digestibility. In the highlands of central-west Argentina, rodent diversity is dominated by Phyllotis vaccarum, Abrothrix andina, Akodon oenos, and Euneomys sp. that coexist in different sections of their elevational ranges. Although these species' diets are relatively flexible, it is unclear how temperature and food availability influence their constitution. To unveil this, we explored their feeding strategies at different elevations (1700, 2300, and 3100 m a.s.l.) and seasons (winter and spring-summer). By examining fecal samples, we quantified the intake of vegetative parts of plants, seeds, and arthropods. Abrothrix andina was insectivorous at 2300 m and omnivorous at 3100 m a.s.l. in line with the OHM predictions, suggesting a higher plant consumption derived from an increased capacity of digestive organs, favored by lower temperatures at higher elevations. Phyllotis vaccarum was herbivorous at all elevations, independently of food supply or temperature conditions. However, the secondary food choice occurred in line with the OHM predictions, suggesting a certain degree of digestive adjustment to ambient temperature. Akodon oenos, which was only captured at 2300 m, was insectivorous, whereas Euneomys sp., which was only present at 3100 m, was a specialist herbivore. We detected no seasonal variation in the feeding strategies of the rodents examined. Intraspecifically, thermoregulatory demands would influence the variation in feeding strategies at the elevational gradient, whereas nutritional requirements would explain their consistency between seasons. Interspecifically, we found that diet dissimilarity was relatively high, mainly at high elevations and during winter, which could facilitate species coexistence.EEA BarrowFil: Ruperto, Emmanuel F. Consejo Nacional de Investigaciones Científicas y Técnicas. CCT-Mendoza. Instituto Argentino de Investigaciones de Zonas Áridas. Ecología Integrativa de Fauna Silvestre; ArgentinaFil: Menéndez, Josefina. Consejo Nacional de Investigaciones Científicas y Técnicas. CCT-Mendoza. Instituto Argentino de Investigaciones de Zonas Áridas. Ecología Integrativa de Fauna Silvestre; ArgentinaFil: Taraborelli, Paula Andrea. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Barrow; ArgentinaFil: Taraborelli, Paula Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Dacar, María Ana. Consejo Nacional de Investigaciones Científicas y Técnicas. CCT-Mendoza. Instituto Argentino de Investigaciones de Zonas Áridas. Ecología Integrativa de Fauna Silvestre; ArgentinaFil: Sassi, Paola L. Consejo Nacional de Investigaciones Científicas y Técnicas. CCT-Mendoza. Instituto Argentino de Investigaciones de Zonas Áridas. Ecología Integrativa de Fauna Silvestre; ArgentinaFil: Sassi, Paola L. Universidad Nacional de Cuyo. Facultad de Ciencias Exactas y Naturales; ArgentinaSpringer2023-06-15T13:10:03Z2023-06-15T13:10:03Z2023-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://hdl.handle.net/20.500.12123/14630https://link.springer.com/article/10.1007/s13364-023-00694-22199-24012199-241Xhttps://doi.org/10.1007/s13364-023-00694-2Mammal Research : 1-15 (Published: 13 May 2023)reponame:INTA Digital (INTA)instname:Instituto Nacional de Tecnología Agropecuariaenginfo:eu-repo/semantics/restrictedAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)2026-01-08T10:39:04Zoai:localhost:20.500.12123/14630instacron:INTAInstitucionalhttp://repositorio.inta.gob.ar/Organismo científico-tecnológicoNo correspondehttp://repositorio.inta.gob.ar/oai/requesttripaldi.nicolas@inta.gob.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:l2026-01-08 10:39:04.654INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuariafalse
dc.title.none.fl_str_mv Spatio-temporal variability in the feeding strategy of Andean rodents: the role of ambient temperature and food availability
title Spatio-temporal variability in the feeding strategy of Andean rodents: the role of ambient temperature and food availability
spellingShingle Spatio-temporal variability in the feeding strategy of Andean rodents: the role of ambient temperature and food availability
Ruperto, Emmanuel Fabián
Roedores
Alimentación de los Animales
Temperatura
Suministro de Alimentos
Dieta
Rodents
Animal Feeding
Temperature
Food Supply
Diet
Disponibilidad de Alimentos
Región Andina
Food Availability
title_short Spatio-temporal variability in the feeding strategy of Andean rodents: the role of ambient temperature and food availability
title_full Spatio-temporal variability in the feeding strategy of Andean rodents: the role of ambient temperature and food availability
title_fullStr Spatio-temporal variability in the feeding strategy of Andean rodents: the role of ambient temperature and food availability
title_full_unstemmed Spatio-temporal variability in the feeding strategy of Andean rodents: the role of ambient temperature and food availability
title_sort Spatio-temporal variability in the feeding strategy of Andean rodents: the role of ambient temperature and food availability
dc.creator.none.fl_str_mv Ruperto, Emmanuel Fabián
Menéndez, Josefina
Taraborelli, Paula Andrea
Dacar, María Ana
Sassi, Paola Lorena
author Ruperto, Emmanuel Fabián
author_facet Ruperto, Emmanuel Fabián
Menéndez, Josefina
Taraborelli, Paula Andrea
Dacar, María Ana
Sassi, Paola Lorena
author_role author
author2 Menéndez, Josefina
Taraborelli, Paula Andrea
Dacar, María Ana
Sassi, Paola Lorena
author2_role author
author
author
author
dc.subject.none.fl_str_mv Roedores
Alimentación de los Animales
Temperatura
Suministro de Alimentos
Dieta
Rodents
Animal Feeding
Temperature
Food Supply
Diet
Disponibilidad de Alimentos
Región Andina
Food Availability
topic Roedores
Alimentación de los Animales
Temperatura
Suministro de Alimentos
Dieta
Rodents
Animal Feeding
Temperature
Food Supply
Diet
Disponibilidad de Alimentos
Región Andina
Food Availability
dc.description.none.fl_txt_mv Animals' diets reflect the morpho-physiological and behavioral responses used to obtain nutrients and energy. While optimal foraging theory predicts them in terms of food availability, the obligatory heat model (OHM) predicts them based on ambient temperature, which affects the activity and/or size of the digestive organs, influencing food digestibility. In the highlands of central-west Argentina, rodent diversity is dominated by Phyllotis vaccarum, Abrothrix andina, Akodon oenos, and Euneomys sp. that coexist in different sections of their elevational ranges. Although these species' diets are relatively flexible, it is unclear how temperature and food availability influence their constitution. To unveil this, we explored their feeding strategies at different elevations (1700, 2300, and 3100 m a.s.l.) and seasons (winter and spring-summer). By examining fecal samples, we quantified the intake of vegetative parts of plants, seeds, and arthropods. Abrothrix andina was insectivorous at 2300 m and omnivorous at 3100 m a.s.l. in line with the OHM predictions, suggesting a higher plant consumption derived from an increased capacity of digestive organs, favored by lower temperatures at higher elevations. Phyllotis vaccarum was herbivorous at all elevations, independently of food supply or temperature conditions. However, the secondary food choice occurred in line with the OHM predictions, suggesting a certain degree of digestive adjustment to ambient temperature. Akodon oenos, which was only captured at 2300 m, was insectivorous, whereas Euneomys sp., which was only present at 3100 m, was a specialist herbivore. We detected no seasonal variation in the feeding strategies of the rodents examined. Intraspecifically, thermoregulatory demands would influence the variation in feeding strategies at the elevational gradient, whereas nutritional requirements would explain their consistency between seasons. Interspecifically, we found that diet dissimilarity was relatively high, mainly at high elevations and during winter, which could facilitate species coexistence.
EEA Barrow
Fil: Ruperto, Emmanuel F. Consejo Nacional de Investigaciones Científicas y Técnicas. CCT-Mendoza. Instituto Argentino de Investigaciones de Zonas Áridas. Ecología Integrativa de Fauna Silvestre; Argentina
Fil: Menéndez, Josefina. Consejo Nacional de Investigaciones Científicas y Técnicas. CCT-Mendoza. Instituto Argentino de Investigaciones de Zonas Áridas. Ecología Integrativa de Fauna Silvestre; Argentina
Fil: Taraborelli, Paula Andrea. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Barrow; Argentina
Fil: Taraborelli, Paula Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Dacar, María Ana. Consejo Nacional de Investigaciones Científicas y Técnicas. CCT-Mendoza. Instituto Argentino de Investigaciones de Zonas Áridas. Ecología Integrativa de Fauna Silvestre; Argentina
Fil: Sassi, Paola L. Consejo Nacional de Investigaciones Científicas y Técnicas. CCT-Mendoza. Instituto Argentino de Investigaciones de Zonas Áridas. Ecología Integrativa de Fauna Silvestre; Argentina
Fil: Sassi, Paola L. Universidad Nacional de Cuyo. Facultad de Ciencias Exactas y Naturales; Argentina
description Animals' diets reflect the morpho-physiological and behavioral responses used to obtain nutrients and energy. While optimal foraging theory predicts them in terms of food availability, the obligatory heat model (OHM) predicts them based on ambient temperature, which affects the activity and/or size of the digestive organs, influencing food digestibility. In the highlands of central-west Argentina, rodent diversity is dominated by Phyllotis vaccarum, Abrothrix andina, Akodon oenos, and Euneomys sp. that coexist in different sections of their elevational ranges. Although these species' diets are relatively flexible, it is unclear how temperature and food availability influence their constitution. To unveil this, we explored their feeding strategies at different elevations (1700, 2300, and 3100 m a.s.l.) and seasons (winter and spring-summer). By examining fecal samples, we quantified the intake of vegetative parts of plants, seeds, and arthropods. Abrothrix andina was insectivorous at 2300 m and omnivorous at 3100 m a.s.l. in line with the OHM predictions, suggesting a higher plant consumption derived from an increased capacity of digestive organs, favored by lower temperatures at higher elevations. Phyllotis vaccarum was herbivorous at all elevations, independently of food supply or temperature conditions. However, the secondary food choice occurred in line with the OHM predictions, suggesting a certain degree of digestive adjustment to ambient temperature. Akodon oenos, which was only captured at 2300 m, was insectivorous, whereas Euneomys sp., which was only present at 3100 m, was a specialist herbivore. We detected no seasonal variation in the feeding strategies of the rodents examined. Intraspecifically, thermoregulatory demands would influence the variation in feeding strategies at the elevational gradient, whereas nutritional requirements would explain their consistency between seasons. Interspecifically, we found that diet dissimilarity was relatively high, mainly at high elevations and during winter, which could facilitate species coexistence.
publishDate 2023
dc.date.none.fl_str_mv 2023-06-15T13:10:03Z
2023-06-15T13:10:03Z
2023-05
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/20.500.12123/14630
https://link.springer.com/article/10.1007/s13364-023-00694-2
2199-2401
2199-241X
https://doi.org/10.1007/s13364-023-00694-2
url http://hdl.handle.net/20.500.12123/14630
https://link.springer.com/article/10.1007/s13364-023-00694-2
https://doi.org/10.1007/s13364-023-00694-2
identifier_str_mv 2199-2401
2199-241X
dc.language.none.fl_str_mv eng
language eng
dc.rights.none.fl_str_mv info:eu-repo/semantics/restrictedAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv restrictedAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Springer
publisher.none.fl_str_mv Springer
dc.source.none.fl_str_mv Mammal Research : 1-15 (Published: 13 May 2023)
reponame:INTA Digital (INTA)
instname:Instituto Nacional de Tecnología Agropecuaria
reponame_str INTA Digital (INTA)
collection INTA Digital (INTA)
instname_str Instituto Nacional de Tecnología Agropecuaria
repository.name.fl_str_mv INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuaria
repository.mail.fl_str_mv tripaldi.nicolas@inta.gob.ar
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score 13.113929

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