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Fig. 1


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Overview of the experimental design. Wild-caught and hatchery-reared fish originated from the same region of the Yangtze River, between Honghu (114.02 E; 30.08 N) and Huangang (114.87 E; 30.45 N). Hatchery-reared fry were kept in hatchery conditions for 3 generations. Wild-caught and hatchery-reared F4 fry were kept in outdoor ponds until they became juveniles, at which point they were transferred to indoor tanks for acclimation (two weeks) before experimentation.

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