ABSTRACT
Data taken concurrently with identical methods at farfield sites in Lake Michigan allowed for direct comparison between man-made structures and the lake proper to determine if the structures were influencing fish composition and abundance. Fish were collected near the rock jetties and breakwater of the Ludington Pumped Storage Plant. The breakwater is 335 m west of the jetties and extends for about 518 m parallel to shore. Round whitefish were second in abundance from bottom nets, but were rare in surface samples. Three species were selected for detailed study because of their relatively high abundance and sport/commercial value: yellow perch, round whitefish and lake trout. Although overall fish abundance at the breakwater and Lake Michigan differed little, yellow perch were taken in consistently higher numbers at the breakwater. The greatest differences between surface nets and bottom nets were observed with yellow perch and round whitefish.
