Striped bass spawning success can vary dramatically from year to year. Environmental conditions such as flow rates and water temperature influence spawning rates. Other anadromous species, such as white perch, yellow perch, and river herring, also experienced low reproductive success this year. Scientists attribute the drop to weather conditions. A separate survey, conducted by the Virginia Institute of Marine Science, found poor striped bass spawning success in Virginia’s portion of Chesapeake Bay.