Data from: Stay or go? Changing breeding conditions affect sexual difference in colony attendance strategies of Atlantic puffins Fratercula arctica ...

• Main Author: Anker-Nilssen, Tycho
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: Zenodo 2024
• Subjects: Colony attendance; Breeding conditions; Sex-specific responses; life history trade-offs; Fratercula arctica; fratercula
• Online Access: https://dx.doi.org/10.5281/zenodo.10797813; https://zenodo.org/doi/10.5281/zenodo.10797813

Male and female birds have different interests in reproductive investment, which in turn may increase negative effects of poorer breeding conditions caused by e.g., climate change or ecosystem regime shifts. Using a 33-year time series with resightings of Atlantic puffins Fratercula arctica individually colour-ringed as breeders in previous years, we show that the difference in colony attendance of male and female birds depends on the environmental conditions for raising young, proxied by the average duration of the chick period and size of the herring Clupea harengus fed to the chicks in the colony each year. The longer the chick period, and thus the birds' overall investment in reproduction, the more was the sex ratio of adults sitting out on the colony surface biased in favour of males. An increase in herring size, indicating better feeding conditions for raising chicks, led to more observations of both sexes, and the increase was slightly more prominent for females than males. We discuss the results in ... : Funding provided by: The Research Council of NorwayROR ID: https://ror.org/00epmv149Award Number: 192141 ...