Membrane-bound intestinal enzymes of passerine birds: dietary and phylogenetic correlates

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dc.contributor.authorRamirez-Otarola, Natalia
dc.contributor.authorNarvaez, Cristobal
dc.contributor.authorSabat, Pablo
dc.date.accessioned2025-01-21T00:01:08Z
dc.date.available2025-01-21T00:01:08Z
dc.date.issued2011
dc.description.abstractBird species exhibit great diversity in digestive tract morphology and enzymatic activity that is partly correlated with the chemical composition of their natural diets. However, no studies have assessed whether the activities of digestive enzymes of the enterocytes correlate with dietary chemical composition data analyzed as a continuous variable at an evolutionary scale. We used a phylogenetically explicit approach to examine the effect of diet on the hydrolytic activity of three digestive enzymes (maltase, sucrase, and aminopeptidase-N) in 16 species of songbirds (Order Passeriformes) from Central Chile. The total activities (mu mol/min) of these enzymes were positively associated with body mass using both conventional least squares regressions and phylogenetically independent contrasts. After removing mass effects, we found a significant negative correlation between the ratio of aminopeptidase-N and maltase to the proportion of seeds found in the gizzard, but this relationship was no longer significant after controlling for phylogeny. When we analyzed the specific nutritional content of the diet, we found that the percentage of nitrogen in diet was negatively correlated with residual maltase activity and positively correlated with the ratio aminopeptidase-N/maltase. Given the large interspecific differences in biochemical capacity, we conclude that these differences reflect genetically determined evolutionary changes associated with the nutrient contents of each species' natural diet.
dc.description.funderFONDECYT
dc.fuente.origenWOS
dc.identifier.doi10.1007/s00360-011-0557-3
dc.identifier.eissn1432-136X
dc.identifier.issn0174-1578
dc.identifier.urihttps://doi.org/10.1007/s00360-011-0557-3
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/95374
dc.identifier.wosidWOS:000293002300011
dc.issue.numero6
dc.language.isoen
dc.pagina.final827
dc.pagina.inicio817
dc.revistaJournal of comparative physiology b-biochemical systems and environmental physiology
dc.rightsacceso restringido
dc.subjectAminopeptidase-N
dc.subjectBird
dc.subjectDiet
dc.subjectDisaccharidases
dc.subjectPhylogenetically independent contrast
dc.subject.ods03 Good Health and Well-being
dc.subject.odspa03 Salud y bienestar
dc.titleMembrane-bound intestinal enzymes of passerine birds: dietary and phylogenetic correlates
dc.typeartículo
dc.volumen181
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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