My experiences with hybrid stripers agrees with Bruce's comments. Last week I caught two stripers 20" and 22"; water temperature 76F. I did not "play" them excessively; just long enough to get them to the dock and lip them. After release both fish died during the next two days. An earlier stocking of hyb stripers also showed a very low tolerance to catch and release of large fish (24"-28") during warm weather conditions.
