I was wondering if they (LMB and GSF) might keep each others populations in check.
Yes, so long as there is very little cover for young of the year to hide in. Those 18" LMB were regulary eating 6-7" GSF and the GSF kept LMB reproduction to a minumum. This lake changed dramitically when curlyleaf pond weed and chara showed up giving the YOY of both species places to avoid predation.
