Table of Contents - Continued 
Age LFAtCLOS coccccerecesscvrcrescecceeeeneeesacscevescessscoes 
Species comparisons ceescceescccreccessececcesenvcasecce 
Mallard COCHOSCHSSSETCOFSOCOCHOEOOCOOCOCHSESOHEH OO ASO BOB OOOCHR ECS 
Variation among StateS eesccccecsecesceccecceccececc 
Chronological variation Ceocoeeeesneocroeseeesseeoeensce 
Variations in age ratios within States cccccccceee 
Mallard age ratios from bag checks and 
supplemental wing collectiomS ecoccesecscececces 
Black duck cecoscsceercccoecesedeoceroesnenceeenesceocce 
American widgeon COCOKOHTOCHSOESDOE CORSETS ERECT HOE OOEEO® 
Green-winged teal COOCHSHSEOCHTCHEDOHEOCOHO BEER EEC OOO EEOC EEE OS 
Blue-winged teal eccccevecesvrccesccesereccesesesecvecee 
Pintall] ecocccvoceccessvecveveseececceceeessccceseacecce 
Wood «duck csc ceecc sees eee cones reese 800 UR eee eebeeeeaee 
Lesser scaup COCOHCHeCHEOHEKHOCHSEHEOCHEKTCH SOHO OEH HERO HOHE ES OBOE ES 
Ring-necked duck Sone eeeH OTH eeseeeerceseoeeeevoseeseeeeses 
SEX TatlOS cecccecsrccesescescveescescescecesseecsasecceveses 
Mallard coccoesccccvcccccvcceseceesceneseescceeceseesen 
American WIidgeon ccccevccccecccccscccescccesccccceseseen 
Green-winged teal cceccccccvccecccecesccccvesscesescces 
Blue-winged teal ceccvcscecceccccececccccsccececcscecen 
Pintail PSCHESOCHCOHCHSOSSSTOHE HHH HETCHEEE RHEE TER SE OBESE OE OES 
Wood duck ceccccccceereccecsccreesceccesscvecsecsesceces 
Lesser SCAUP ececcceecccssvreserersesescesesevesecesesns 
Kill and population estimates Seevneeeseceeveecasseeeoece0es0eeeqn 
Problems involved in sampling the duck kill 
by the wing collection technique COORD COG See TD eOeOe Oe EBB Oe 
Geographic distribution of the sample eoeeeeecesceesnnc 
Seasonal distribution of the sample eoreccocsesoesaseenes 
Differential vulnerability COeKDALOCOC OS eo ROR EDeCODOCEHOS 
Sampling SXLTTOLT ececcocsvrveccecoseeoceeoeeeeeseeoeooosesen 
Conclusions and recommendations cecececcsceceseccececcoseses 
Summary COKRKOOKDOCCHOHSOHOOCOTDETCEHSSOOCC EO COS HE OHO SOHOOOC HSH OHHH OEDETS 
Literature CLted. é.oe'6\e-0 060.06 60:6 66.0 6.5 6064s OR Ob CES OSC OOS Oe OS 
Tables eececesooc@#osese cea oacesescaocoseoeaee c4#ececesoeoev ee coesecaoeceesend 
43 
44 
Appendix o@eeeeeecesceeseseoeoeoceveeeoscpeoevneoeeteeoeaevoeaseeoeeceneoeeoeveee eee eece0 6 118 
iv 
