As our weather turns to spring, some of our thoughts might turn to winterkill. In this episode of Wildlife Matters , the masked biologist looks at lakes under ice and why winterkill happens. Every year when spring rolls around, I can expect fisherman and lakeshore owners to show concern about the potential for winterkill, a term for fish dying under the ice due to a lack of oxygen. A lake that has not winterkilled in the past is probably not likely to experience winterkill this year. However,