Catch-and-release fishing can be a useful tool for managing recreational fishing, as long as fish mortality is low and anglers are happy. A study in Brittany, France, found that most anglers prefer less restrictive fishing rules. While catch-and-release can lower the value of a fishing trip for some, many anglers still see it positively. This means that catch-and-release fishing could help generate money for rivers once a certain limit of fish caught is reached. Overall, the time of year and how busy the river is have a bigger impact on the value of fishing trips than catch-and-release.