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Data from: Extra-pair paternity in two populations of the socially monogamous Thorn-tailed Rayadito Aphrastura spinicauda (Passeriformes: Furnariidae)

Citation

Botero-Delgadillo, Esteban et al. (2021), Data from: Extra-pair paternity in two populations of the socially monogamous Thorn-tailed Rayadito Aphrastura spinicauda (Passeriformes: Furnariidae), Dryad, Dataset, https://doi.org/10.5061/dryad.hdr7sqvg3

Abstract

Studies on extra-pair paternity (EPP) are key to understanding the ecological and evolutionary drivers of variation in avian mating strategies, but information is currently lacking for most tropical and sub-tropical taxa. We describe the occurrence of EPP in two populations of a South American socially monogamous bird, the Thorn-tailed Rayadito, based on data from 266 broods and 895 offspring that were sampled during six breeding seasons in north-central and southern Chile. In the northern population, 21% of the broods contained at least one extra-pair young and 14% of all offspring were sired by an extra-pair male, while in the southern population, we detected extra-pair offspring (EPO) in 14% of the broods, and 6% of all offspring were EPO. Variation in the frequency of EPP could stem from population differences in the duration of the breeding season or the density of breeding individuals. Other factors such as differences in breeding synchrony and variation in food availability need to be evaluated. More reports on EPP rates are necessary to determine the patterns of taxonomic and geographic variation in mating strategies in Neotropical birds, and to better understand the differences in ecological dynamics between northern and southern hemisphere populations.

Usage Notes

All instructions regarding the dataset can be found in the ReadMe.txt file.

Funding

Comisión Nacional de Investigación Científica y Tecnológica, Award: PFB-23-CONICYT-Chile

Comisión Nacional de Investigación Científica y Tecnológica, Award: AFB-170008-CONICYT-Chile

Comisión Nacional de Investigación Científica y Tecnológica, Award: CONICYT-Chile 63130100

Fondo Nacional de Desarrollo Científico, Tecnológico y de Innovación Tecnológica, Award: 1100359

Fondo Nacional de Desarrollo Científico, Tecnológico y de Innovación Tecnológica, Award: 1140548

Fondo Nacional de Desarrollo Científico, Tecnológico y de Innovación Tecnológica, Award: 3110059

Fondo Nacional de Desarrollo Científico, Tecnológico y de Innovación Tecnológica, Award: 11130245

Iniciativa Científica Milenio ICM, Award: ICM-P05-002

Universidad de Chile, Award: Facultad de Ciencias PAIFAC 2019

Max-Planck-Gesellschaft

Iniciativa Científica Milenio ICM, Award: ICM-P05-002