16Adams wrote on Feb 23rd, 2018 at 5:15pm:There was south shore brookie trib that was catch and release for a while. There are also a few that are so inaccessible that harvest must be close to nill. You would also think that if competition was the driving brook trout outmigration (i.e. the "critical mass" hypothesis), we'd see more outmigrants on the brule, where there must be strong competition w/ coho and brown trout (both of which have been shown to compete with brook trout). The whole coaster thing seems to be a bit of a black box.
It's definitely far from clear. It just seems to me that the way to test the theory is to try catch and release. I haven't been on the upper brule in a few years, but the quieter waters were never crowded with brookies. I've had some good brookie fishing there, but not like I've had on some other streams. And, of the ones that are there, a pretty small percentage are a foot long.
Also, I believe there has been some out migration. I think occasional coasters have been seen on the weir camera.
Some of the smaller rivers in Wisconsin have pretty damaged habitat.
Special regs on one or two streams, and a bit of habitat work just isn't much to show for 30 years, esp. when compared with Ontario and the other states.
Also, it just seems like the easiest way to test the restricted regulation/crowding theory would be to implement catch and release, or something close to it.