Catch-and-release fishing helps conserve fish populations, but released fish may become harder to catch. A study in British Columbia found that angler catch rates dropped quickly with high fishing effort, even when the number of fish stayed the same. The fish seemed to learn to avoid hooks after being caught, leading to lower catch rates over time. This suggests that managing recreational fisheries for angler satisfaction needs to consider not just conservation, but also the impact of fishing effort on fish behavior.