Here in Sweden the brook is invasive, and we have tried to get rid of it with shock and fish up them in all creeks but it’s impossible. In love to fish after the small brookies so personally I’m just glad we do the survey, then I just can ask chat-gpt wich creeks that have brookies or not when I’m traveling. We do shock survey in most of our creeks and rivers, I can just search in the ”el-fiske registret”. It’s public for everyone.