DOI: 10.5061/dryad.f9013
title: Data from: Quantifying inbreeding avoidance through extra-pair reproduction

description: Extra-pair reproduction is widely hypothesised to allow females to avoid
 inbreeding with related socially-paired males. Consequently, numerous
 field studies have tested the key predictions that extra-pair offspring
 are less inbred than females’ alternative within-pair offspring, and that
 the probability of extra-pair reproduction increases with a female's
 relatedness to her socially-paired male. However such studies rarely
 measure inbreeding or relatedness sufficiently precisely to detect subtle
 effects, or consider biases stemming from failure to observe inbred
 offspring that die during early development. Analyses of
 multi-generational song sparrow (Melospiza melodia) pedigree data showed
 that most females had opportunity to increase or decrease the coefficient
 of inbreeding of their offspring through extra-pair reproduction with
 neighbouring males. In practice, observed extra-pair offspring had lower
 inbreeding coefficients than females’ within-pair offspring on average,
 while the probability of extra-pair reproduction increased substantially
 with the coefficient of kinship between a female and her socially-paired
 male. However, simulations showed that such effects could simply reflect
 bias stemming from inbreeding depression in early offspring survival. The
 null hypothesis that extra-pair reproduction is random with respect to
 kinship therefore cannot be definitively rejected in song sparrows, and
 existing general evidence that females avoid inbreeding through extra-pair
 reproduction requires re-evaluation given such biases.
description: breed.data.dryad.useThis file contains data required for the simulation that quantifies the consequences of observation failure due to offspring mortality for estimates of inbreeding avoidance through extra-pair reproduction.data.epy.dryad.useThis file contains the data for the basic analysis of inbreeding avoidance through extra-pair reproduction.data.fems.dryad.useThis file contains the data for the analyses of extra-pair reproduction, clutch size, probability of offspring mortality and brood size in relation to a female's kinship with her socially paired male.data.neighbours.dryad.useThis dataset describes the coefficient of kinship between each focal female and her first-, second- and non-neighbour males.neighbours.na.dryad.useThis file contains data required for the simulation that quantifies the consequences of observation failure due to offspring mortality for estimates of inbreeding avoidance through extra-pair reproduction.neighbours1.dryad.useThis file contains data required for the simulation that quantifies the consequences of observation failure due to offspring mortality for estimates of inbreeding avoidance through extra-pair reproduction.neighbours2.dryad.useThis file contains data required for the simulation that quantifies the consequences of observation failure due to offspring mortality for estimates of inbreeding avoidance through extra-pair reproduction.ped.data.dryad.useThis file contains data required for the simulation that quantifies the consequences of observation failure due to offspring mortality for estimates of inbreeding avoidance through extra-pair reproduction.simulationRcode.dryad.useThis simulation code quantifies the consequences of observation failure (ie pre-banding mortality) for estimates of the pattern of occurrence of extra-pair reproduction in relation to the kinship between a female and her socially-paired male, and the degree of inbreeding avoidance through extra-pair reproduction.