Offspring of first-generation hatchery steelhead trout (Oncorhynchus mykiss) grow faster in the hatchery than offspring of wild fish, but survive worse in the wild: possible mechanisms for inadvertent domestication and fitness loss in hatchery salmon
M. Blouin, M. C. Wrey, S. R. Bollmann, J. C. Skaar, R. G. Twibell, C. Fuentes
The paper tests whether hatchery-raised steelhead trout grow faster in hatcheries but survive worse in the wild, finding a growth-survival tradeoff after one generation of selection.
bioRxiv · Sep 2, 2021Zoology