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Comparative Effectiveness of Large Mesh 0+ inch
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adult females adult males April bird mortality birds are taken birds in gill birds taken boats box of nets breeding bursa catches of birds catches of ducks cent chubs closed season common loon dabbling ducks depth diving birds diving ducks duck catch factors fathoms feathers fishing gear fishing pressure gill nets gill-net fishermen grebe Green Bay gulls horned grebe juvenile birds juvenile females juvenile males Lake Michigan lake trout large catches large numbers lesser scaup lifting lower lake sample March mergansers mesh mortality in gill nets set numbers of birds obtained old-squaw ducks old-squaws taken ovary oviduct plumage population port estimate rectrices red-throated loon reported result Saugatuck scoters Sewers of Saugatuck sex and age sex ratios small-mesh South Haven species of waterfowl specimens storms taken in gill taking told total annual mortality twine Washington Island waterfowl weights whitefish nets wintering grounds Wisconsin