The larger Gammarus species of scuds do not do well when the water gets warm usually above 75F. They are a cool water species.
Thanks for the input Bill. From what I've read, 75 might even be pushing it. I hope I'm far enough North for these guys (about 20 miles form Wisconsin). Maybe they can find cold enough water in the deeper parts (12 feet)of my pond to survive but, if not, at least I've learned a good bit about scuds. My plan is to hit a lake near me this spring to see if I can net some of a local species and, hopefully, a grass shrimp or three.
