Physiological and biochemical responses to dietary protein in the omnivore passerine <i>Zonotrichia capensis</i> (Emberizidae)

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dc.contributor.authorSabat, P
dc.contributor.authorSepúlveda-Kattan, E
dc.contributor.authorMaldonado, K
dc.date.accessioned2025-01-21T01:08:20Z
dc.date.available2025-01-21T01:08:20Z
dc.date.issued2004
dc.description.abstractWe studied the physiological, biochemical and morphological responses of the omnivore sparrow Zonotrichia capensis, a small opportunistic passerine from Central Chile acclimated to high- and low-protein diets. After 4 weeks of acclimation to 30% (high-protein group) or 7% (low-protein group) dietary casein, we collected urine and plasma for nitrogen waste production and osmometry analysis, and measured gross renal morphology. Plasma osmolality and hematocrit were not significantly affected by dietary treatment, but urine osmolality was higher in the high-protein group than in the low-protein group. Kidney and heart masses were higher in animals acclimated to the high-protein diet. Mean total nitrogen waste was significantly higher in the high-protein group, but the proportions of nitrogen excreted as uric acid, urea and ammonia were unaffected by diet. Our data suggest that the response of Z. capensis to an increase in dietary protein content is through greater amounts of total nitrogen excretion and hypertrophy of kidney structures, without any modification of the proportion of excretory compounds. (C) 2003 Elsevier Inc. All rights reserved.
dc.fuente.origenWOS
dc.identifier.doi10.1016/j.cbpb.2003.10.021
dc.identifier.eissn1531-4332
dc.identifier.issn1095-6433
dc.identifier.urihttps://doi.org/10.1016/j.cbpb.2003.10.021
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/96455
dc.identifier.wosidWOS:000188977900014
dc.issue.numero2
dc.language.isoen
dc.pagina.final396
dc.pagina.inicio391
dc.revistaComparative biochemistry and physiology a-molecular & integrative physiology
dc.rightsacceso restringido
dc.subjectammonotely
dc.subjectammonia
dc.subjectdietary protein
dc.subjectosmoregulation
dc.subjecturea
dc.subjecturic acid
dc.subjecturine
dc.subjectrenal function
dc.subjectZonotrichia capensis
dc.subject.ods03 Good Health and Well-being
dc.subject.odspa03 Salud y bienestar
dc.titlePhysiological and biochemical responses to dietary protein in the omnivore passerine <i>Zonotrichia capensis</i> (Emberizidae)
dc.typeartículo
dc.volumen137
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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