Population differences in early life-history traits in grayling.

摘要: In this paper we test population differences in early life-history traits three grayling Thymallus thymallus populations. The shared ancestors some 80‐90 years ago. We performed common-garden experiments at temperatures (mimicking population-specific summer temperatures), and measured survival growth rates during development. found significant additive genetic variance size (length yolk-sac volume) hatching, swim-up termination of the experiment, significantly different reaction norms for rate period first feeding. general, each did best temperature experienced nature. These suggest that natural selection has resulted local adaptation a time 13‐18 generations.