If something is killing your GSF but sparing the walleye, I would like to know what it is killing the GSF. They tend to pretty tough. In Oklahoma, they inhabit shallow pools in intermittent creeks that are completely shaded by trees. So they are pretty tough as far as DO goes.
It may be possible that the few you have seen are aged individuals that are dying of natural causes to which they are more vulnerable due to age. Don't know but this might explain why GSF are the only observed deaths. In any event, a GSF may not likely survive a walleye's bite even if it escaped the being eaten part. So if most of them had evidence of predator strikes, this may explain their exclusive appearance as well?
Last edited by jpsdad; 08/23/20 09:36 PM.
