DULUTH SUPERIOR HARBOR FISHERY SURVEY - PROGRESS REPORT

Abstract

Field work for the Duluth-Superior Harbor Fishery Survey was initiated on 11 April. Sampling has been conducted with an electrofishing boat (generally us­ing 250 volt, 11 amp, D.C. current), fyke nets_ (3 x 6' front_hoop-¾_40'--and-80 leads, 1" square mesh), seine (25' long, 3/8" square mesh), and meter net(500 micron plankton net, 1 meter in diameter). Efforts have included 14 days of electrofishing, 22 trap net sets, seining a minimum of 10 stations every other week, and weekly meter net hauls in the harbor and Lake Superior (Tables