Effect of low-quality diet on torpor frequency and depth in the pichi Zaedyus pichiy (Xenarthra, Dasypodidae), a South American armadillo
- Autores
- Superina, Mariella; Jahn, Graciela Alma
- Año de publicación
- 2013
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Daily torpor is a physiological adaptation that allows mammals to cope with energetic challenges associated with unpredictable periods of food shortage. We experimentally tested whether food quality influences torpor frequency and depth in the pichi (Zaedyus pichiy), a small, opportunistically omnivorous armadillo endemic to arid and semi-arid habitats of southern South America. We recorded body temperature (Tsc) changes in 10 semi-captive, adult female pichis using dataloggers implanted subcutaneously during periods of 21 days. All individuals entered spontaneous daily torpor, but those receiving a low-quality diet had significantly lower daily mean and minimum Tsc, spent more time at Tsc below their individual lower limit of normothermia, and had a higher Heterothermy Index than controls. Five individuals entered prolonged torpor bouts lasting more than 24 hours, two of them repeatedly. Nine out of ten prolonged torpor bouts occurred in individuals feeding on a low-quality diet, suggesting that pichis are able to enter prolonged periods of torpor during severe environmental stress. In combination with their ability to hibernate and to respond to a reduced insect abundance by ingesting other food items, this physiological adaptation allows pichis to better cope with food shortages and a more extreme climate than other armadillos. It may explain why Z. pichiy naturally occurs farther south than any other armadillo species.
Fil: Superina, Mariella. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Medicina y Biología Experimental de Cuyo; Argentina
Fil: Jahn, Graciela Alma. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Medicina y Biología Experimental de Cuyo; Argentina - Materia
-
ARGENTINA
CINGULATA
FOOD QUALITY
HYPOMETABOLISM
THERMOREGULATION
TORPOR
XENARTHRA - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/1430
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Effect of low-quality diet on torpor frequency and depth in the pichi Zaedyus pichiy (Xenarthra, Dasypodidae), a South American armadilloSuperina, MariellaJahn, Graciela AlmaARGENTINACINGULATAFOOD QUALITYHYPOMETABOLISMTHERMOREGULATIONTORPORXENARTHRAhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Daily torpor is a physiological adaptation that allows mammals to cope with energetic challenges associated with unpredictable periods of food shortage. We experimentally tested whether food quality influences torpor frequency and depth in the pichi (Zaedyus pichiy), a small, opportunistically omnivorous armadillo endemic to arid and semi-arid habitats of southern South America. We recorded body temperature (Tsc) changes in 10 semi-captive, adult female pichis using dataloggers implanted subcutaneously during periods of 21 days. All individuals entered spontaneous daily torpor, but those receiving a low-quality diet had significantly lower daily mean and minimum Tsc, spent more time at Tsc below their individual lower limit of normothermia, and had a higher Heterothermy Index than controls. Five individuals entered prolonged torpor bouts lasting more than 24 hours, two of them repeatedly. Nine out of ten prolonged torpor bouts occurred in individuals feeding on a low-quality diet, suggesting that pichis are able to enter prolonged periods of torpor during severe environmental stress. In combination with their ability to hibernate and to respond to a reduced insect abundance by ingesting other food items, this physiological adaptation allows pichis to better cope with food shortages and a more extreme climate than other armadillos. It may explain why Z. pichiy naturally occurs farther south than any other armadillo species.Fil: Superina, Mariella. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Medicina y Biología Experimental de Cuyo; ArgentinaFil: Jahn, Graciela Alma. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Medicina y Biología Experimental de Cuyo; ArgentinaPergamon-Elsevier Science Ltd2013-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/1430Superina, Mariella; Jahn, Graciela Alma; Effect of low-quality diet on torpor frequency and depth in the pichi Zaedyus pichiy (Xenarthra, Dasypodidae), a South American armadillo; Pergamon-Elsevier Science Ltd; Journal of Thermal Biology; 38; 5; 3-2013; 280-2850306-4565enginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.jtherbio.2013.03.004info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:35:10Zoai:ri.conicet.gov.ar:11336/1430instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:35:10.331CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Effect of low-quality diet on torpor frequency and depth in the pichi Zaedyus pichiy (Xenarthra, Dasypodidae), a South American armadillo |
title |
Effect of low-quality diet on torpor frequency and depth in the pichi Zaedyus pichiy (Xenarthra, Dasypodidae), a South American armadillo |
spellingShingle |
Effect of low-quality diet on torpor frequency and depth in the pichi Zaedyus pichiy (Xenarthra, Dasypodidae), a South American armadillo Superina, Mariella ARGENTINA CINGULATA FOOD QUALITY HYPOMETABOLISM THERMOREGULATION TORPOR XENARTHRA |
title_short |
Effect of low-quality diet on torpor frequency and depth in the pichi Zaedyus pichiy (Xenarthra, Dasypodidae), a South American armadillo |
title_full |
Effect of low-quality diet on torpor frequency and depth in the pichi Zaedyus pichiy (Xenarthra, Dasypodidae), a South American armadillo |
title_fullStr |
Effect of low-quality diet on torpor frequency and depth in the pichi Zaedyus pichiy (Xenarthra, Dasypodidae), a South American armadillo |
title_full_unstemmed |
Effect of low-quality diet on torpor frequency and depth in the pichi Zaedyus pichiy (Xenarthra, Dasypodidae), a South American armadillo |
title_sort |
Effect of low-quality diet on torpor frequency and depth in the pichi Zaedyus pichiy (Xenarthra, Dasypodidae), a South American armadillo |
dc.creator.none.fl_str_mv |
Superina, Mariella Jahn, Graciela Alma |
author |
Superina, Mariella |
author_facet |
Superina, Mariella Jahn, Graciela Alma |
author_role |
author |
author2 |
Jahn, Graciela Alma |
author2_role |
author |
dc.subject.none.fl_str_mv |
ARGENTINA CINGULATA FOOD QUALITY HYPOMETABOLISM THERMOREGULATION TORPOR XENARTHRA |
topic |
ARGENTINA CINGULATA FOOD QUALITY HYPOMETABOLISM THERMOREGULATION TORPOR XENARTHRA |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
Daily torpor is a physiological adaptation that allows mammals to cope with energetic challenges associated with unpredictable periods of food shortage. We experimentally tested whether food quality influences torpor frequency and depth in the pichi (Zaedyus pichiy), a small, opportunistically omnivorous armadillo endemic to arid and semi-arid habitats of southern South America. We recorded body temperature (Tsc) changes in 10 semi-captive, adult female pichis using dataloggers implanted subcutaneously during periods of 21 days. All individuals entered spontaneous daily torpor, but those receiving a low-quality diet had significantly lower daily mean and minimum Tsc, spent more time at Tsc below their individual lower limit of normothermia, and had a higher Heterothermy Index than controls. Five individuals entered prolonged torpor bouts lasting more than 24 hours, two of them repeatedly. Nine out of ten prolonged torpor bouts occurred in individuals feeding on a low-quality diet, suggesting that pichis are able to enter prolonged periods of torpor during severe environmental stress. In combination with their ability to hibernate and to respond to a reduced insect abundance by ingesting other food items, this physiological adaptation allows pichis to better cope with food shortages and a more extreme climate than other armadillos. It may explain why Z. pichiy naturally occurs farther south than any other armadillo species. Fil: Superina, Mariella. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Medicina y Biología Experimental de Cuyo; Argentina Fil: Jahn, Graciela Alma. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Medicina y Biología Experimental de Cuyo; Argentina |
description |
Daily torpor is a physiological adaptation that allows mammals to cope with energetic challenges associated with unpredictable periods of food shortage. We experimentally tested whether food quality influences torpor frequency and depth in the pichi (Zaedyus pichiy), a small, opportunistically omnivorous armadillo endemic to arid and semi-arid habitats of southern South America. We recorded body temperature (Tsc) changes in 10 semi-captive, adult female pichis using dataloggers implanted subcutaneously during periods of 21 days. All individuals entered spontaneous daily torpor, but those receiving a low-quality diet had significantly lower daily mean and minimum Tsc, spent more time at Tsc below their individual lower limit of normothermia, and had a higher Heterothermy Index than controls. Five individuals entered prolonged torpor bouts lasting more than 24 hours, two of them repeatedly. Nine out of ten prolonged torpor bouts occurred in individuals feeding on a low-quality diet, suggesting that pichis are able to enter prolonged periods of torpor during severe environmental stress. In combination with their ability to hibernate and to respond to a reduced insect abundance by ingesting other food items, this physiological adaptation allows pichis to better cope with food shortages and a more extreme climate than other armadillos. It may explain why Z. pichiy naturally occurs farther south than any other armadillo species. |
publishDate |
2013 |
dc.date.none.fl_str_mv |
2013-03 |
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/11336/1430 Superina, Mariella; Jahn, Graciela Alma; Effect of low-quality diet on torpor frequency and depth in the pichi Zaedyus pichiy (Xenarthra, Dasypodidae), a South American armadillo; Pergamon-Elsevier Science Ltd; Journal of Thermal Biology; 38; 5; 3-2013; 280-285 0306-4565 |
url |
http://hdl.handle.net/11336/1430 |
identifier_str_mv |
Superina, Mariella; Jahn, Graciela Alma; Effect of low-quality diet on torpor frequency and depth in the pichi Zaedyus pichiy (Xenarthra, Dasypodidae), a South American armadillo; Pergamon-Elsevier Science Ltd; Journal of Thermal Biology; 38; 5; 3-2013; 280-285 0306-4565 |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jtherbio.2013.03.004 |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
dc.format.none.fl_str_mv |
application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
Pergamon-Elsevier Science Ltd |
publisher.none.fl_str_mv |
Pergamon-Elsevier Science Ltd |
dc.source.none.fl_str_mv |
reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
reponame_str |
CONICET Digital (CONICET) |
collection |
CONICET Digital (CONICET) |
instname_str |
Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.name.fl_str_mv |
CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.mail.fl_str_mv |
dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
_version_ |
1844614369212628992 |
score |
13.070432 |