Data from: Natal habitat and sex-specific survival rates result in a male-biased adult sex ratio ...

• Main Authors: Loonstra, A. H. Jelle, Verhoeven, Mo A., Senner, Nathan R., Hooijmeijer, Jos C.E.W., Piersma, Theunis, Kentie, Rosemarie
• Format: Dataset
• Language: English
• Published: Dryad 2019
• Subjects: adult sex ratio; Hatching sex-ratio; Limosa limosa limosa; Sex-specific survival; black-tailed godwit; Limosa limosa
• Online Access: https://dx.doi.org/10.5061/dryad.bk58sd6; https://datadryad.org/stash/dataset/doi:10.5061/dryad.bk58sd6

The adult sex ratio (ASR) is a crucial component of the ecological and evolutionary forces shaping the dynamics of a population. Although in many declining populations ASRs have been reported to be skewed, empirical studies exploring the demographic factors shaping ASRs are still rare. In this study of the socially monogamous and sexually dimorphic Black-tailed Godwit (Limosa limosa limosa), we aim to evaluate the sex ratio of chicks at hatch and the subsequent sex-specific survival differences occurring over three subsequent life-stages. We found that, at hatch, the sex ratio did not deviate from parity. However, the survival of pre-fledged females was 15-30% lower than that of males and the sex-bias in survival was higher in low quality habitat. Additionally, survival of adult females was almost 5% lower than that of adult males. Because survival rates of males and females did not differ during other life-history stages, the adult sex ratio in the population was biased toward males. Because females are ... : Data_Capture_Recapture_Survival_AnalysisCapture-recapture dataset used for the survival analysis. CR-history contains two digits per year, first digit is only used when individual was ringed as chick. Further details explained in file.Data_Hatching_Sex_RatioDataset containing all chicks from complete nests and used to calculate sex ratio at hatch. All details are explained in file. ...