AT 
Table 7 - WEEKLY DUCK POPULATIONS AND PERAK NUMBERS 
Upper Mississippi River Wildlife and Fish Refuge 
September-December 
WEEK $ 3 : 3 H 2 : teak 4 
ENDING : 1953 2 1954 2 1955 1956 : 1957 : 1958 1959 1960 : 
: . ¢ : : 2 : 3 : 
Sept. 7: 36,446 18,012 ;: he ,893 20,720 : 51,605 : 41,353 : 36, 50L : 52,915 : 
Sept.1l4: 37,364 26 ,637 : 55,193 ho ,835° : 62,408 : 45,922 : 51,222 : 64 ,832 
Sept.21:  4h,873 36,218 ; 65 ,876 50,280 : 92,184 : 81,027 : 70,925 : 79,550 
3 
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Sept.28: 48,318 : 43,164 ; Th 460 67,825 : 82,869 : 105,237: 77,523 : 104,055 : 
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Oct. 5: 56,092 58,432 : 92 ,035 77,413: 113,952 : 136,455 : 69,438 : 127,330: 
Oct. 12: 50,384 75,594 : 116,950 : 64,325 : 93,040 : 205,010": 96,595 : 178,650; 
Oct. 19: 57,058 : 125,992 : 129,580: 62,240 : 118,520: 149,875 : 174,542: 178,1he : 
- 26: 65,675 =: 114,k00 : 133,340: 78,355 : 212,0h0 : 187,580: 148,903: 232,916: 
Nov. 2 ; 59 ,960 : 106 ,642 ; 30h, 579%: 135 ,605 3 345, ;280%: 195 ,895 : 203 ,95T*s 179,005 : 
Nov. 9: 100,585 ;: 160,845%: 2he,ko2 : 196,365: 27h.880 : 194,435 : 147,516: 112,439 : 
Nov. 16: 121,884 : 153,680: 120,315: 259,621: 238,855: 151,111: 78,120 : 71,217 : 
Nov. 23: 202,365 : 129,976: 76,125 : 266,665: 206,775 : 139,890 : 13 ,580 : 72,093: 
13 Nov. 30: 206,520* : 123,375: 39,575 : 114,005 : 85,735 : 112,435: 14 438 : 31,744 
1h Dec. 7: £487,765 : 98,350: 6,030 : 102,625 ; 39,375 : 56,486 : 10,590 : hh 403 
15 Dec. 14: 63,810 : 26,770: 3,588 : 84 680 : 12,794 : 11,519 : 9,364 : 35,690 
16 Dec. 21: 21,695 : 11,165: 2,796 : Ly’; HO : 5,035 : 9,278 : 8,112 18 ,860 
17 Dec. 28: LAT 3: 6,155 : 2,950 : 2, ee : 7,335 : 7,351 : 7,015 18,394 : 
a4 3 3 3 2 1,404 = 
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USE 28 842,540 39,235,163 310,560,949 111,489,961. + 214,298,774 112,851,426 8 538,215 :11,215 ,645 ; 
*#Peak concentration 
Note: Earliest peak occurred the week ending October 12 in 1958; latest peak occurred the week ending 
November 30 in 1953; while average peak occurs during the first week in November. 
