IADIZA   20886
INSTITUTO ARGENTINO DE INVESTIGACIONES DE LAS ZONAS ARIDAS
Unidad Ejecutora - UE
artículos
Título:
Synchrony does not explain extra-pair paternity rate variation in northern or southern house wrens
Autor/es:
K. LABARBERA; P. E. LLAMBIAS; E. R. CRAMER; T, D. SCHAMING; I. J. LOVETTE
Revista:
Behavioral Ecology
Editorial:
Oxford Journals
Referencias:
Lugar: Oxford; Año: 2010 vol. 21 p. 773 - 780
ISSN:
1045-2249
Resumen:
Rates
of extrapair paternity (EPP) vary widely among and within bird
species, and 2 hypotheses suggest that this variation is driven by
variation in breeding synchrony. These hypotheses make contradictory
predictions, and each has some support from field studies, but the
general relationship between EPP and synchrony remains unclear. We
investigated EPP in relation to population-wide and local breeding
synchrony in 2 populations of house wrens (Troglodytes aedon)a
migratory northern temperate (New York, USA) and a sedentary southern
temperate (Buenos Aires, Argentina) populationthat differ in numerous
life-history traits. The northern population had significantly higher
EPP rates and modestly but significantly higher local breeding
synchrony. Population-wide breeding synchrony did not differ between
populations. The proportion of extrapair young within a nest was not
related to the nests population-wide or local synchrony index in
either population. These results suggest that across divergent life
histories in this species, breeding synchrony does not account for
within-population variation in EPP