Aphrastura spinicauda change their reproductive strategy with altitude in the Andean temperate forest of South America

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dc.contributor.authorAltamirano, Tomás A.
dc.contributor.authorIbarra Eliessetch, José Tomás
dc.contributor.authorMaza, Mariano de la
dc.contributor.authorNavarrete, Sergio A.
dc.contributor.authorBonacic Salas, Cristian
dc.date.accessioned2022-11-25T16:25:37Z
dc.date.available2022-11-25T16:25:37Z
dc.date.issued2015
dc.description.abstractElevational gradients have been proposed as a driver of change in avian reproductive lifehistory strategies. The eventual shorter breeding season and higher predation risk at highaltitudes can produce a decline in fecundity, a reduction of clutch sizes, and an increase inparental care and survival. We studied whether the breeding strategy of the Aphrasturaspinicauda varies along an elevation gradient in the Andean temperate forests of Chile. Weinstalled 240 nest-boxes between 260 and 1,115 m a.s.l., and monitored the breedingactivity of 162 nests over two seasons (2010-2011, 2011-2012). As predicted, the breedingseason was 28% and 55% shorter in highland forests during the two seasons. Timing of egglaying (1 egg every second day) and incubation period (average 15 days) did not vary withaltitude. We found smaller clutch sizes (average 4.1 vs. 4.5), a fewer number of nestlingsper clutch (average 3.5 vs. 4.2), and longer nestling period (22.2 vs. 21.6 days) in highlandthan lowland forests. The breeding success declined with altitude, mainly due to predationby the Dromiciops gliroides which was 83% in highland and 35% in lowland forests. Ourfindings suggest that Aphrastura spinicauda change their reproductive strategy alongaltitudinal gradients to a slower one, likely as an adaptation to shorter breeding seasons.Yet, these changes do not appear to compensate for the increased predation rates at higherelevations, questioning the potential adaptive significance of this strategy
dc.fuente.origenSIPA
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/65802
dc.information.autorucSede regional de villarrica ; Ibarra Eliessetch, José Tomás ; 0000-0002-7705-3974 ; 120091
dc.information.autorucFacultad de agronomía e ingenieria forestal ; Bonacic Salas Cristian ; 0000-0003-2175-076X ; 100304
dc.language.isoen
dc.nota.accesoContenido parcial
dc.relation.ispartofNeotropical Ornithological Congress (10° : 2015 : Manaus, Brasil)
dc.rightsacceso abierto
dc.subjectCavity-nesteres_ES
dc.subjectElevational gradientes_ES
dc.subjectLife-history traitses_ES
dc.subjectTemperate forestses_ES
dc.subjectThorn-tailed Rayaditoes_ES
dc.titleAphrastura spinicauda change their reproductive strategy with altitude in the Andean temperate forest of South Americaes_ES
dc.typecomunicación de congreso
sipa.codpersvinculados120091
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