EFFECTS OF NUTRITIONAL AND ANTI-NUTRITIONAL PROPERTIES OF SEEDS ON THE FEEDING ECOLOGY OF SEED-EATING BIRDS OF THE MONTE DESERT, ARGENTINA

Simple item page
dc.contributor.authorManuel Rios, Juan
dc.contributor.authorMangione, Antonio
dc.contributor.authorMarone, Luis
dc.date.accessioned2025-01-20T23:59:38Z
dc.date.available2025-01-20T23:59:38Z
dc.date.issued2012
dc.description.abstractFood quality and physiological capacities and limitations in recognizing and processing food are among the factors influencing the choices of desert birds in feeding. Seed-eating birds of the central Monte desert generally select grass seeds rather than forb seeds. We studied some of the mechanisms underlying seed-selection patterns in seed-eating birds of the Monte desert, analyzing nutrients and secondary compounds of the 15 most abundant seeds in the soil and their relationship with the diet of six species of seed-eating birds. Grass seeds contained more starch and less total phenols than did forb seeds and were free from alkaloids. The diet of the most graminivorous birds was correlated with seeds' starch concentration, while generalists' diet was correlated with seed abundance. To assess the plausible mechanisms underlying birds' selection of seed, we experimented with three species differing in the breadth of their diet: a generalist, the Rufous-collared Sparrow (Zonotrichia capensis), and two graminivores, the Many-colored Chaco-Finch (Saltatricula multicolor) and Common Diuca-Finch (Diuca diuca). We postulated that the level of starch and the presence of phenolic compounds and alkaloids influence food preference. Results suggest that most graminivorous birds prefer high-starch diets and avoid diets with phenols and alkaloids. In contrast, the generalist foraged regardless of starch content, and its food intake was reduced only by some of the phenols and alkaloids tested. Seed chemistry may explain some important features of seed selection by birds in the Monte desert.
dc.fuente.origenWOS
dc.identifier.doi10.1525/cond.2012.110043
dc.identifier.eissn1938-5129
dc.identifier.urihttps://doi.org/10.1525/cond.2012.110043
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/95302
dc.identifier.wosidWOS:000301687000004
dc.issue.numero1
dc.language.isoen
dc.pagina.final55
dc.pagina.inicio44
dc.revistaCondor
dc.rightsacceso restringido
dc.subjectalkaloids
dc.subjectavian food choice
dc.subjectdiet composition
dc.subjectgranivory
dc.subjectphenols
dc.subjectseeds
dc.subjectstarch
dc.subject.ods13 Climate Action
dc.subject.ods14 Life Below Water
dc.subject.ods15 Life on Land
dc.subject.odspa13 Acción por el clima
dc.subject.odspa14 Vida submarina
dc.subject.odspa15 Vida de ecosistemas terrestres
dc.titleEFFECTS OF NUTRITIONAL AND ANTI-NUTRITIONAL PROPERTIES OF SEEDS ON THE FEEDING ECOLOGY OF SEED-EATING BIRDS OF THE MONTE DESERT, ARGENTINA
dc.typeartículo
dc.volumen114
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
Files
Collections
Artículos de revistas