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dc.contributor.author
Lee, Kelly A.  
dc.contributor.author
Karasov, William  
dc.contributor.author
Caviedes Vidal, Enrique Juan Raul  
dc.date.available
2021-07-18T13:22:13Z  
dc.date.issued
2002-05  
dc.identifier.citation
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  
dc.identifier.issn
1522-2152  
dc.identifier.uri
http://hdl.handle.net/11336/136380  
dc.description.abstract
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.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
University of Chicago Press  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
Migrating birds  
dc.subject
Infrequent feeding  
dc.subject
Digestive organ masses  
dc.subject.classification
Bioquímica y Biología Molecular  
dc.subject.classification
Ciencias Biológicas  
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS  
dc.title
Digestive response to restricted feeding in migratory yellow-rumped warblers  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2021-02-17T20:12:02Z  
dc.identifier.eissn
1537-5293  
dc.journal.volume
75  
dc.journal.number
3  
dc.journal.pagination
314-323  
dc.journal.pais
Estados Unidos  
dc.journal.ciudad
Chicago  
dc.description.fil
Fil: Lee, Kelly A.. University of Wisconsin; Estados Unidos  
dc.description.fil
Fil: Karasov, William. University of Wisconsin; Estados Unidos  
dc.description.fil
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  
dc.journal.title
Physiological and Biochemical Zoology  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.journals.uchicago.edu/doi/10.1086/342003  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1086/342003