Table 45. Regional Differences in Age Ratios of Pintails. 
PE 

Number of; Age Ratio 
State Immatures Adults Immatures per adult 
—eeEEOoOEOEOEOEOEOEooEooyoooooE—E—EEEEEEeEeEeEeEeEEE—————EEE—eESESESES=E=E=S==_— 
Minnesota 67 40 1.68 
Wisconsin 21 14 1.50 
Michigan 24 19 1.26 
Total 112 73 1.53 
Iowa . 9 9 
Missouri 11 8 
Arkansas 3 2 
Louisiana 14 35 0. 40 
Total 37 54 0.68 
Illinois 17 7 
Ohio 19 5 
Tennessee 2 3 
Mississippi 2 0 
Total 40 15 2.67 
Table 46. Seasonal Changes in Age Ratios of Pintails in Minnesota 



Period Number _ of: Age Ratio 
Tnmatures Adults Imm/ Adult 
Oct. 7 = 13 50 31 1.61 
Oct. 14-Nov. 17 17 9 1.89 
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