Feeding and digestive responses to fatty acid intake in two South American passerines with different food habits

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dc.contributor.authorManuel Rios, Juan
dc.contributor.authorBarcelo, Gonzalo F.
dc.contributor.authorNarvaez, Cristobal
dc.contributor.authorMaldonado, Karin
dc.contributor.authorSabat, Pablo
dc.date.accessioned2025-01-23T21:43:29Z
dc.date.available2025-01-23T21:43:29Z
dc.date.issued2014
dc.description.abstractSpecific fatty acids (FA) such as unsaturated (UFA) and saturated (SFA) fatty acids contained in foods are key factors in the nutritional ecology of birds. By means of a field and experimental approach, we evaluated the effect of diet on the activity of three esterases involved in FA hydrolysis; carboxylesterase (CE: 4-NPA-CE and a-NA-CE) and butyrylcholinesterase, in two South American passerines: the omnivorous rufous-collared sparrow (Zonotrichia capensis) and the granivorous common diuca-finch (Diuca diuca). The activity of the three esterases was measured in the intestines of freshly caught individuals over two distinct seasons and also after a chronic intake of a UFA-rich or SFA-rich diet in the laboratory. In turn, we assessed the feeding responses of the birds choosing amongst diets contrasting in the kind of specific FA (UFA- vs. SFA-treated diets). During summer, field CE activities (4-NPA-CE and a-NA-CE) in the small intestine were higher in the rufous-collared sparrow (25.3 +/- A 3.3 and 81.4 +/- A 10.8 A mu mol min(-1) g tissue(-1), respectively) than in the common diuca-finch (10.0 +/- A 3.0 and 33.9 +/- A 13.1 A mu mol min(-1) g tissue(-1), respectively). Two hour feeding trial test indicated that both species exhibited a clear preference for UFA-treated diets. On average, the rufous-collared sparrow consumed 0.46 g 2 h(-1) of UFA-rich diets and 0.12 g 2 h(-1) of SFA-rich diets. In turn, the consumption pattern of the common diuca-finch averaged 0.73 and 0.16 g 2 h(-1) for UFA-rich and SFA-rich diets, respectively. After a month of dietary acclimation to UFA-rich and SFA-rich diets, both species maintained body mass irrespective of the dietary regime. Additionally, the intestinal 4-NPA-CE activity exhibited by birds fed on a UFA-rich or SFA-rich diet was higher in the rufous-collared sparrow (39.0 +/- A 5.3 and 44.2 +/- A 7.3 A mu mol min(-1) g tissue(-1), respectively) than in the common diuca-finch (13.3 +/- A 1.9 and 11.2 +/- A 1.4 A mu mol min(-1) g tissue(-1), respectively). Finally, the intestinal a-NA-CE activity exhibited by the rufous-collared sparrow was about two times higher when consuming an UFA-rich diet. Our results suggest that the rufus-collared sparrow exhibits a greater capacity for intestinal FA hydrolysis, which would allow it to better deal with fats from different sources.
dc.description.funderFondo Nacional de Desarrollo Cientifico y Tecnologico (Chile)
dc.fuente.origenWOS
dc.identifier.doi10.1007/s00360-014-0832-1
dc.identifier.eissn1432-136X
dc.identifier.issn0174-1578
dc.identifier.urihttps://doi.org/10.1007/s00360-014-0832-1
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/101677
dc.identifier.wosidWOS:000339886800005
dc.issue.numero6
dc.language.isoen
dc.pagina.final739
dc.pagina.inicio729
dc.revistaJournal of comparative physiology b-biochemical systemic and environmental physiology
dc.rightsacceso restringido
dc.subjectBirds
dc.subjectButyrylcholinesterase
dc.subjectCarboxylesterase
dc.subjectFatty acids
dc.subjectFood habits
dc.subject.ods03 Good Health and Well-being
dc.subject.odspa03 Salud y bienestar
dc.titleFeeding and digestive responses to fatty acid intake in two South American passerines with different food habits
dc.typeartículo
dc.volumen184
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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