must be those underwater fireworks again

I just thought of something:

The die-off of the gizzard shad, a fish that is often eaten by larger predators, in Lake St. Clair is due to the "harsh winter weather conditions and a large year-class," according to the Department of Natural Resources and Environment.

If this is the case, then why are there fish of ALL sizes? The "large year-class" would only really suffice as an explanation if the fish were all relatively the same size (age) when they died. As for the "harsh" winter weather... please! This is Michigan we are talking about. Its always cold in the winter up there. Oh, and that really would not affect the underwater life very much. Otherwise, these fish would all died like this every year. Use common sense Department of Natural Resources and Environment! You're suppose to be smart!

I used to live near there as well and every winter all my fishing buddies would go ice fishing and usually come back with loads of perch, pike and walleye. Sure its polluted, but I too have never head of this type of die-off since the alewives came up the St Lawrence river in the 60's. Also, I wouldn't believe anything the Michigan DNR says, they will lie to keep from having to take responsibility or take any action. Just like they denied the cougar sightings and that wolves were crossing the UP straits in the winter.