The study looked at how many walleyes caught by anglers survived after being released. They found that walleyes caught on leeches had a higher mortality rate (10%) compared to those caught on artificial lures (0%). In one pond, 5% of released walleyes died, but it could have been as high as 23%. Walleyes caught on leeches were smaller and more likely to be males. The way the fish were hooked also affected their survival, with leech-caught walleyes being hooked deeper. Overall, the study suggests that releasing angler-caught walleyes could help expand recreational fishing opportunities.