Species such as bowfin (Amia calva), lake chubsucker (Erimyzon sucetta), warmouth (Lepomis gulosus), banded killifish (Fundulus diaphanous), starhead topminnow (Fundulus dispar) have declined in numbers, i.e., relative abundance, and presence in a number of lakes.
Year Species 1941 1997 1998 Amia calva X Ctenopharyngodon idella X Erimyzon sucetta X Umbra limi X X Esox americanus X X X Esox lucius X X X Fundulus dispar X Fundulus notatus X Ameiurus nebulosus X Lepomis gulosus X X Lepomis macrochirus X X X Lepomis gibbosus X X Lepomis microlophus X Micropterus salmoides X X X Pomoxis annularis X Pomoxis nigromaculatus X Total species 7 8 10 Table 2.