Is diet-shifting facilitated by modulation of pancreatic enzymes? Test of an adaptational hypothesis in Yellow-rumped Warblers

Autores
Ciminari, María Eugenia; Afik, Daniel; Karasov, William; Caviedes Vidal, Enrique Juan Raul
Año de publicación
2001
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Many birds exhibit seasonal switches in diet and thus alter nutrients predominating their food intake. We tested for dietary modulation of pancreatic enzymes in Yellow-rumped Warblers (Dendroica coronata), a species for which such dietary changes are documented. Birds were fed three diets formulated from either fruit, insect, or seed. We predicted that pancreatic carbohydrase amylase, and the proteases trypsin and chymotrypsin, would be modulated in direct correlation with relative levels of dietary carbohydrate and protein, respectively. In contrast to the prediction, there was no significant dietary effect on activities of amylase and chymotrypsin, and a significant change in trypsin activity (highest on seed diet) occurred in the wrong direction with regard to the prediction. Considering the statistical power of our tests, we conclude that Yellow-rumped Warblers represent a case of only modest ability, at best, to modulate pancreatic enzymes. For some diets, especially high-starch diets that they digest relatively poorly and on which they tend to lose body mass, they may lack sufficient enzyme and hence are constrained in their dietary niche.
Fil: Ciminari, María Eugenia. Universidad Nacional de San Luis; Argentina
Fil: Afik, Daniel. University of Haifa at Oranim; Israel
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
Birds
Diet
Pancreatic carbohydrase amylase
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:11336/136381
Acceder
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repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Is diet-shifting facilitated by modulation of pancreatic enzymes? Test of an adaptational hypothesis in Yellow-rumped WarblersCiminari, María EugeniaAfik, DanielKarasov, WilliamCaviedes Vidal, Enrique Juan RaulBirdsDietPancreatic carbohydrase amylasehttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Many birds exhibit seasonal switches in diet and thus alter nutrients predominating their food intake. We tested for dietary modulation of pancreatic enzymes in Yellow-rumped Warblers (Dendroica coronata), a species for which such dietary changes are documented. Birds were fed three diets formulated from either fruit, insect, or seed. We predicted that pancreatic carbohydrase amylase, and the proteases trypsin and chymotrypsin, would be modulated in direct correlation with relative levels of dietary carbohydrate and protein, respectively. In contrast to the prediction, there was no significant dietary effect on activities of amylase and chymotrypsin, and a significant change in trypsin activity (highest on seed diet) occurred in the wrong direction with regard to the prediction. Considering the statistical power of our tests, we conclude that Yellow-rumped Warblers represent a case of only modest ability, at best, to modulate pancreatic enzymes. For some diets, especially high-starch diets that they digest relatively poorly and on which they tend to lose body mass, they may lack sufficient enzyme and hence are constrained in their dietary niche.Fil: Ciminari, María Eugenia. Universidad Nacional de San Luis; ArgentinaFil: Afik, Daniel. University of Haifa at Oranim; IsraelFil: 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; ArgentinaAmerican Ornithologists' Union2001-10-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/136381Ciminari, María Eugenia; Afik, Daniel; Karasov, William; Caviedes Vidal, Enrique Juan Raul; Is diet-shifting facilitated by modulation of pancreatic enzymes? Test of an adaptational hypothesis in Yellow-rumped Warblers; American Ornithologists' Union; Auk; 118; 4; 1-10-2001; 1101-11070004-80381938-4254CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/auk/article/118/4/1101/5561977info:eu-repo/semantics/altIdentifier/doi/10.1093/auk/118.4.1101info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:42:05Zoai:ri.conicet.gov.ar:11336/136381instacron: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 09:42:06.007CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Is diet-shifting facilitated by modulation of pancreatic enzymes? Test of an adaptational hypothesis in Yellow-rumped Warblers
title Is diet-shifting facilitated by modulation of pancreatic enzymes? Test of an adaptational hypothesis in Yellow-rumped Warblers
spellingShingle Is diet-shifting facilitated by modulation of pancreatic enzymes? Test of an adaptational hypothesis in Yellow-rumped Warblers
Ciminari, María Eugenia
Birds
Diet
Pancreatic carbohydrase amylase
title_short Is diet-shifting facilitated by modulation of pancreatic enzymes? Test of an adaptational hypothesis in Yellow-rumped Warblers
title_full Is diet-shifting facilitated by modulation of pancreatic enzymes? Test of an adaptational hypothesis in Yellow-rumped Warblers
title_fullStr Is diet-shifting facilitated by modulation of pancreatic enzymes? Test of an adaptational hypothesis in Yellow-rumped Warblers
title_full_unstemmed Is diet-shifting facilitated by modulation of pancreatic enzymes? Test of an adaptational hypothesis in Yellow-rumped Warblers
title_sort Is diet-shifting facilitated by modulation of pancreatic enzymes? Test of an adaptational hypothesis in Yellow-rumped Warblers
dc.creator.none.fl_str_mv Ciminari, María Eugenia
Afik, Daniel
Karasov, William
Caviedes Vidal, Enrique Juan Raul
author Ciminari, María Eugenia
author_facet Ciminari, María Eugenia
Afik, Daniel
Karasov, William
Caviedes Vidal, Enrique Juan Raul
author_role author
author2 Afik, Daniel
Karasov, William
Caviedes Vidal, Enrique Juan Raul
author2_role author
author
author
dc.subject.none.fl_str_mv Birds
Diet
Pancreatic carbohydrase amylase
topic Birds
Diet
Pancreatic carbohydrase amylase
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Many birds exhibit seasonal switches in diet and thus alter nutrients predominating their food intake. We tested for dietary modulation of pancreatic enzymes in Yellow-rumped Warblers (Dendroica coronata), a species for which such dietary changes are documented. Birds were fed three diets formulated from either fruit, insect, or seed. We predicted that pancreatic carbohydrase amylase, and the proteases trypsin and chymotrypsin, would be modulated in direct correlation with relative levels of dietary carbohydrate and protein, respectively. In contrast to the prediction, there was no significant dietary effect on activities of amylase and chymotrypsin, and a significant change in trypsin activity (highest on seed diet) occurred in the wrong direction with regard to the prediction. Considering the statistical power of our tests, we conclude that Yellow-rumped Warblers represent a case of only modest ability, at best, to modulate pancreatic enzymes. For some diets, especially high-starch diets that they digest relatively poorly and on which they tend to lose body mass, they may lack sufficient enzyme and hence are constrained in their dietary niche.
Fil: Ciminari, María Eugenia. Universidad Nacional de San Luis; Argentina
Fil: Afik, Daniel. University of Haifa at Oranim; Israel
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 Many birds exhibit seasonal switches in diet and thus alter nutrients predominating their food intake. We tested for dietary modulation of pancreatic enzymes in Yellow-rumped Warblers (Dendroica coronata), a species for which such dietary changes are documented. Birds were fed three diets formulated from either fruit, insect, or seed. We predicted that pancreatic carbohydrase amylase, and the proteases trypsin and chymotrypsin, would be modulated in direct correlation with relative levels of dietary carbohydrate and protein, respectively. In contrast to the prediction, there was no significant dietary effect on activities of amylase and chymotrypsin, and a significant change in trypsin activity (highest on seed diet) occurred in the wrong direction with regard to the prediction. Considering the statistical power of our tests, we conclude that Yellow-rumped Warblers represent a case of only modest ability, at best, to modulate pancreatic enzymes. For some diets, especially high-starch diets that they digest relatively poorly and on which they tend to lose body mass, they may lack sufficient enzyme and hence are constrained in their dietary niche.
publishDate 2001
dc.date.none.fl_str_mv 2001-10-01
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/11336/136381
Ciminari, María Eugenia; Afik, Daniel; Karasov, William; Caviedes Vidal, Enrique Juan Raul; Is diet-shifting facilitated by modulation of pancreatic enzymes? Test of an adaptational hypothesis in Yellow-rumped Warblers; American Ornithologists' Union; Auk; 118; 4; 1-10-2001; 1101-1107
0004-8038
1938-4254
CONICET Digital
CONICET
url http://hdl.handle.net/11336/136381
identifier_str_mv Ciminari, María Eugenia; Afik, Daniel; Karasov, William; Caviedes Vidal, Enrique Juan Raul; Is diet-shifting facilitated by modulation of pancreatic enzymes? Test of an adaptational hypothesis in Yellow-rumped Warblers; American Ornithologists' Union; Auk; 118; 4; 1-10-2001; 1101-1107
0004-8038
1938-4254
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://academic.oup.com/auk/article/118/4/1101/5561977
info:eu-repo/semantics/altIdentifier/doi/10.1093/auk/118.4.1101
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 American Ornithologists' Union
publisher.none.fl_str_mv American Ornithologists' Union
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_ 1844613326616657920
score 13.070432

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