DOI: 10.5061/dryad.0015b
title: Data from: Resolving the conundrum of inbreeding depression but no inbreeding avoidance: estimating sex-specific selection on inbreeding by song sparrows (Melospiza melodia)

description: Inbreeding avoidance among interacting females and males is not always
 observed despite inbreeding depression in offspring fitness, creating an
 apparent ‘inbreeding paradox’. This paradox could be resolved if selection
 against inbreeding was in fact weak, despite inbreeding depression.
 However, the net magnitude and direction of selection on the degree to
 which females and males inbreed by pairing with relatives has not been
 explicitly estimated. We used long-term pedigree data to estimate
 phenotypic selection gradients on the degree of inbreeding that female and
 male song sparrows (Melospiza melodia) expressed by forming
 socially-persistent breeding pairs with relatives. Fitness was measured as
 the total numbers of offspring and grand-offspring contributed to the
 population, and as corresponding expected numbers of identical-by-descent
 allele copies, thereby accounting for variation in offspring survival,
 reproduction and relatedness associated with variation in parental
 inbreeding. Estimated selection gradients on the degree to which
 individuals paired with relatives were weakly positive in females, but
 negative in males that formed at least one socially-persistent pairing.
 However, males that paired had higher mean fitness than males that
 remained socially unpaired. These analyses suggest that net selection
 against inbreeding may be weak in both sexes despite strong inbreeding
 depression, thereby resolving the ‘inbreeding paradox’.
description: Female Annual
 Reproductive Success DataThis file contains data
 required for the analyses of female annual reproductive success in
 relation to the female's mean kinship with the socially-paired males
 with which she made each breeding attempt across her lifetime. This
 analysis is presented in the paper's Supporting
 Information.FemaleARSDryadFinal.txtFemale Kinship DataThis file contains the raw data underlying the calculation of each female's mean kinship with the socially-paired males with which she made each breeding attempt.FemaleKDryadFinal.txtFemale Lifespan DataThis file contains data required for the analyses of female lifespan in relation to the female's mean kinship with the socially-paired males with which she made each breeding attempt across her lifetime. This analysis is presented in the paper's Supporting Information.FemaleLifeDryadFinal.txtFemale Lifetime Reproductive Success DataThis file contains data required for the analyses of female lifetime reproductive success in relation to the female's mean kinship with the socially-paired males with which she made each breeding attempt.FemaleLRSDryadFinal.txtMale Annual Reproductive Success DataThis file contains data required for the analyses of male annual reproductive success in relation to the male's mean kinship with the socially-paired females with which he made each breeding attempt across his lifetime. This analysis is presented in the paper's Supporting Information.MaleARSDryadFinal.txtMale Kinship DataThis file contains the raw data underlying the calculation of each male's mean kinship with the socially-paired females with which he made each breeding attempt.MaleKDryadFinal.txtMale Lifespan DataThis file contains data required for the analyses of male lifespan in relation to the male's mean kinship with the socially-paired females with which he made each breeding attempt across his lifetime. This analysis is presented in the paper's Supporting Information.MaleLifeDryadFinal.txtMale Lifetime Reproductive Success DataThis file contains data required for the analyses of male lifetime reproductive success in relation to the male's mean kinship with the socially-paired females with which he made each breeding attempt.MaleLRSDryadFinal.txt