Minisatellite mutation rates increase with extra-pair paternity among birds

Area of Science:

• Evolutionary biology
• Behavioral ecology

Background:

• A previous study suggested a positive relationship between minisatellite mutation rates and extra-pair paternity in birds was confounded.
• This study aimed to replicate and expand upon those findings, incorporating additional published studies.

Discussion:

• Replication of the positive association was achieved with a larger dataset (133 species).
• Potential biases in the previous analysis included missed studies, inappropriate mutation rate estimates, transcription errors, and inclusion of single-offspring data.
• The original critique was likely flawed due to methodological issues.

Key Insights:

• A robust positive association exists between minisatellite mutation rates and extra-pair paternity in birds.
• This association explains 5-11% of the variance, with estimates likely conservative due to data noise.
• The relationship remains significant after statistical control for confounding variables.

Outlook:

• Emphasizes the critical need for thorough literature reviews and accurate data transcription in comparative biological studies.
• Suggests that robust conclusions require utilizing all available evidence and rigorous quality control of published estimates.