My suggestion would be to allow sport fishing on the Moyar river, within the limit of the park. Guys like us on this forum could pay a fee to the Forest Dept to fish a stretch. A portion of the money could go to the tribals who poison the river, to encourage them not to do such harmful things. Also recreational anglers could pay the same tribals a 'guide' fee so they make an income off the fishing. This way it makes more 'economic' sense to the tribals to protect their river.... Also all fishing can strictly be catch and release. Maybe they could even have a tagging program..... the list is practically endless.....
Just some of my thoughts on a very relevant topic. I'm sure there'll be more posts with very helpful suggestions.... Going by the attitude the Forest Dept has regarding fishing in the Nilgiris, I really don't think much can be done regarding the future of fish stocks, native or otherwise.
Are you aware that there are/were some decent Mahseer in the Moyar?