Digestive response to restricted feeding in migratory yellow-rumped warblers

Autores
Lee, Kelly A.; Karasov, William; Caviedes Vidal, Enrique Juan Raul
Año de publicación
2002
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Smaller guts and slow initial mass gains at stopover sites have led to the idea that digestive physiology limits refueling rates in migrating birds. We tested the digestive-limitation hypothesis in yellow-rumped warblers using food restriction to simulate infrequent feeding during migration, which may cause a reduction in alimentary tract mass. Restricted birds had small intestine, pancreas, and liver masses 18%-22% lower than ad lib.-fed controls. Total activities of sucrase, maltase, aminopeptidase, and amylase were significantly lower in restricted birds, while those of trypsin and chymotrypsin were not. Only aminopeptidase mass-specific activity was significantly lower in restricted birds. Previously restricted birds were able to feed and digest at a high rate immediately following return to ad lib. feeding. Digestive efficiency did not differ between groups. These results suggest that before migration yellow-rumped warblers have some spare digestive capacity to compensate for declines in their digestive organ masses during migration.
Fil: Lee, Kelly A.. University of Wisconsin; Estados Unidos
Fil: Karasov, William. University of Wisconsin; Estados Unidos
Fil: Caviedes Vidal, Enrique Juan Raul. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto Multidisciplinario de Investigaciones Biológicas de San Luis. Universidad Nacional de San Luis. Facultad de Ciencias Físico Matemáticas y Naturales. Instituto Multidisciplinario de Investigaciones Biológicas de San Luis; Argentina
Materia
Migrating birds
Infrequent feeding
Digestive organ masses
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/136380
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Digestive response to restricted feeding in migratory yellow-rumped warblersLee, Kelly A.Karasov, WilliamCaviedes Vidal, Enrique Juan RaulMigrating birdsInfrequent feedingDigestive organ masseshttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Smaller guts and slow initial mass gains at stopover sites have led to the idea that digestive physiology limits refueling rates in migrating birds. We tested the digestive-limitation hypothesis in yellow-rumped warblers using food restriction to simulate infrequent feeding during migration, which may cause a reduction in alimentary tract mass. Restricted birds had small intestine, pancreas, and liver masses 18%-22% lower than ad lib.-fed controls. Total activities of sucrase, maltase, aminopeptidase, and amylase were significantly lower in restricted birds, while those of trypsin and chymotrypsin were not. Only aminopeptidase mass-specific activity was significantly lower in restricted birds. Previously restricted birds were able to feed and digest at a high rate immediately following return to ad lib. feeding. Digestive efficiency did not differ between groups. These results suggest that before migration yellow-rumped warblers have some spare digestive capacity to compensate for declines in their digestive organ masses during migration.Fil: Lee, Kelly A.. University of Wisconsin; Estados UnidosFil: Karasov, William. University of Wisconsin; Estados UnidosFil: Caviedes Vidal, Enrique Juan Raul. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto Multidisciplinario de Investigaciones Biológicas de San Luis. Universidad Nacional de San Luis. Facultad de Ciencias Físico Matemáticas y Naturales. Instituto Multidisciplinario de Investigaciones Biológicas de San Luis; ArgentinaUniversity of Chicago Press2002-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/136380Lee, Kelly A.; Karasov, William; Caviedes Vidal, Enrique Juan Raul; Digestive response to restricted feeding in migratory yellow-rumped warblers; University of Chicago Press; Physiological and Biochemical Zoology; 75; 3; 5-2002; 314-3231522-21521537-5293CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.journals.uchicago.edu/doi/10.1086/342003info:eu-repo/semantics/altIdentifier/doi/10.1086/342003info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-11-26T09:10:45Zoai:ri.conicet.gov.ar:11336/136380instacron: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:34982025-11-26 09:10:45.656CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Digestive response to restricted feeding in migratory yellow-rumped warblers
title Digestive response to restricted feeding in migratory yellow-rumped warblers
spellingShingle Digestive response to restricted feeding in migratory yellow-rumped warblers
Lee, Kelly A.
Migrating birds
Infrequent feeding
Digestive organ masses
title_short Digestive response to restricted feeding in migratory yellow-rumped warblers
title_full Digestive response to restricted feeding in migratory yellow-rumped warblers
title_fullStr Digestive response to restricted feeding in migratory yellow-rumped warblers
title_full_unstemmed Digestive response to restricted feeding in migratory yellow-rumped warblers
title_sort Digestive response to restricted feeding in migratory yellow-rumped warblers
dc.creator.none.fl_str_mv Lee, Kelly A.
Karasov, William
Caviedes Vidal, Enrique Juan Raul
author Lee, Kelly A.
author_facet Lee, Kelly A.
Karasov, William
Caviedes Vidal, Enrique Juan Raul
author_role author
author2 Karasov, William
Caviedes Vidal, Enrique Juan Raul
author2_role author
author
dc.subject.none.fl_str_mv Migrating birds
Infrequent feeding
Digestive organ masses
topic Migrating birds
Infrequent feeding
Digestive organ masses
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Smaller guts and slow initial mass gains at stopover sites have led to the idea that digestive physiology limits refueling rates in migrating birds. We tested the digestive-limitation hypothesis in yellow-rumped warblers using food restriction to simulate infrequent feeding during migration, which may cause a reduction in alimentary tract mass. Restricted birds had small intestine, pancreas, and liver masses 18%-22% lower than ad lib.-fed controls. Total activities of sucrase, maltase, aminopeptidase, and amylase were significantly lower in restricted birds, while those of trypsin and chymotrypsin were not. Only aminopeptidase mass-specific activity was significantly lower in restricted birds. Previously restricted birds were able to feed and digest at a high rate immediately following return to ad lib. feeding. Digestive efficiency did not differ between groups. These results suggest that before migration yellow-rumped warblers have some spare digestive capacity to compensate for declines in their digestive organ masses during migration.
Fil: Lee, Kelly A.. University of Wisconsin; Estados Unidos
Fil: Karasov, William. University of Wisconsin; Estados Unidos
Fil: Caviedes Vidal, Enrique Juan Raul. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto Multidisciplinario de Investigaciones Biológicas de San Luis. Universidad Nacional de San Luis. Facultad de Ciencias Físico Matemáticas y Naturales. Instituto Multidisciplinario de Investigaciones Biológicas de San Luis; Argentina
description Smaller guts and slow initial mass gains at stopover sites have led to the idea that digestive physiology limits refueling rates in migrating birds. We tested the digestive-limitation hypothesis in yellow-rumped warblers using food restriction to simulate infrequent feeding during migration, which may cause a reduction in alimentary tract mass. Restricted birds had small intestine, pancreas, and liver masses 18%-22% lower than ad lib.-fed controls. Total activities of sucrase, maltase, aminopeptidase, and amylase were significantly lower in restricted birds, while those of trypsin and chymotrypsin were not. Only aminopeptidase mass-specific activity was significantly lower in restricted birds. Previously restricted birds were able to feed and digest at a high rate immediately following return to ad lib. feeding. Digestive efficiency did not differ between groups. These results suggest that before migration yellow-rumped warblers have some spare digestive capacity to compensate for declines in their digestive organ masses during migration.
publishDate 2002
dc.date.none.fl_str_mv 2002-05
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/11336/136380
Lee, Kelly A.; Karasov, William; Caviedes Vidal, Enrique Juan Raul; Digestive response to restricted feeding in migratory yellow-rumped warblers; University of Chicago Press; Physiological and Biochemical Zoology; 75; 3; 5-2002; 314-323
1522-2152
1537-5293
CONICET Digital
CONICET
url http://hdl.handle.net/11336/136380
identifier_str_mv Lee, Kelly A.; Karasov, William; Caviedes Vidal, Enrique Juan Raul; Digestive response to restricted feeding in migratory yellow-rumped warblers; University of Chicago Press; Physiological and Biochemical Zoology; 75; 3; 5-2002; 314-323
1522-2152
1537-5293
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.journals.uchicago.edu/doi/10.1086/342003
info:eu-repo/semantics/altIdentifier/doi/10.1086/342003
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 University of Chicago Press
publisher.none.fl_str_mv University of Chicago Press
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
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score 13.011256

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