To obtain information on the post-spawning movements of yellow perch that spawn in southern Green Bay, Lake Michigan, 4,172 fish caught in drop nets were marked by tagging with monel-metal strap tags attached to the right operculum and 24,799 were marked by clipping off the second or membranous dorsal fin. Marking was done during the period from May 3 to 17, 1950, at six main stations, all located in the southern end of Green Bay.
The average length of the tagged perch was 7.3 inches and all feel within the range of 5.5-14.4 inches. Most (90.0 percent) of the fish were below the minimum legal length of 8.0 inches. The follow-up procedure consisted of informing commercial and sports fishermen of the program and enlisting their cooperation in watching for marked fish; accounts of the investigation were released through newspapers and descriptive posters were distributed. The personnel connected with the investigation examined catches frequently.
The large majority (101 or 79.5 percent) of the 127 tagged perch recaptured in the experimental nets during marking operations were retaken at the tagging station at which they were released.
Additional publication details
Movements of yellow perch marked in southern Green Bay, Lake Michigan, in 1950