Lovely to be involved in this work!

Our preregistered #systematicreview & #metaanalysis, now out in Ecology Letters, synthesises 438 effects from 57 studies on 19 wild bird 🐦species to test if & how egg hormones relate to fitness 📰 doi.org/10.1111/ele.... Data & Code github.com/ASanchez-Toj... Registration: doi.org/10.17605/OSF...

A new meta-study challenges the widely held belief that hormone levels in wild bird eggs are an adaptive mechanism: There is no effect of egg hormones on maternal or offspring fitness. Read the paper: onlinelibrary.wiley.com/doi/10.1111/...