Fitness consequences of different migratory strategies in partially migratory populations: A multi-taxa meta-analysis.

ABSTRACT: Partial migration-wherein migratory and non-migratory individuals exist within the same population-represents a behavioural dimorphism; for it to persist over time, both strategies should yield equal individual fitness. This balance may be maintained through trade-offs where migrants gain survival benefits by avoiding unfavourable conditions, while residents gain breeding benefits from early access to resources. There has been little overarching quantitative analysis of the evidence for this fitness balance. As migrants-especially long-distance migrants-may be particularly vulnerable to environmental change, it is possible that recent anthropogenic impacts could drive shifts in fitness balances within these populations. We tested these predictions using a multi-taxa meta-analysis. Of 2,939

SUBMITTER: Buchan C 

PROVIDER: S-EPMC7078763 | biostudies-literature | 2020 Mar

REPOSITORIES: biostudies-literature