GT 
F 
Combined Units of the 
MARK TWAIN NATIONAL WILDLIFE REFUGE 
Table 8 - WEEKLY DUCK POPULATIONS AND PEAK NUMBERS 

September=December 
WEEK 3 : : : 3 | : : : 
ENDING : 1953 : 1954 > 1955 : 1956 31957 : 1958 s 1959 : 1960 : 
: 3 3 t 3 3 3 $ ; 
1 Sept. 7: 3,450 : 14,050 : 12,205 : 8,980 ; 2,575 3 10,015: : 14,185 : 6,930 : 
2 Sept.1h : 4,150 3 18,060 : 17,660 : 12,045 : ,150 : 13,115 : 15 ,869 : 7,906 : 
3 Sept.2l: 8,500 : 11,930 : 23,970 : 18 ,930 : 7,300 3: 16,205 : 30 ,898 : 7,905 : 
hk Sept.28 : 16,405 : 15,430 : 2k ,825 : 33,500 : 8,800 ; 2k ,725 : 15,989 : 12,408 : 
5 Oct. 5 3 28,500 : 20,050 : 27,500 : 39,325 : 7,750 : 36,710 : 18,960 : 35,728 : 
6 Oct. 122 61,000 : 30,345 : 20 ,600 : 43,850 : 9,000 : 4O ,133 : 28 ,313 : 5,001 ; 
7 Oct. 19: 70,200 3 49,800 : 36,100 ;: 50,450 : 31,825 : hi, : 62 ,640 95 ,898 : 
8 Oct. 26: »900 : 28,975 : 103,950 : 55,100 : 167,700: 21,768 : 62,765 : 227,018 : 
9 Nov. 2 : 79,600 : 57,000 : 4h5,700 : 89,550 : 218,800 : 33,023 : 197,182 : 91,769 : 
10 Nov. 9 3 69,100 : 285,650: 435,650: 255,250: 307,370: 90,350 : 235,083 : 139,157: 
1l Wov. 16: 350,300: 246,115; ,200 : 386,950: 401,650 : 60,450 : 225,816: 101,899 
12 Nov. 23 : 1,177,600%: 340,700 : 463,450: 711,550: 322,425 : 81,690 : 149,395 : 101,094 ; 
13 Nov. 30: 752,700: 379,475 : 810,h00¥: 719,300: 297,200: 160,153: 181,265: 261,831 
1k Dee. 7 : 806,300: 500,300: 478,700-: 709,850: 365,450: 459,374 : 388,680 : 255,031: 
15 Dec. 14: 871,600: 810,300%: 608,050: 839,500%:  559,k00%: 162,507 : 398,060": 238,029 : 
16 Dec. 21°: 463,500: 611,000: 253,700: 531,151.: 165,400: 557,180: 347,995 :  290,726*: 
17 Dec. 28: 362,500: 502,300: 240,800: 370,500: 147,200: 577,925%: 306,465 93,220 : 
Jan. 4 : 356,500: 269,800: 3 = 3 -~  -: 72,035 : - - : 


TOTAL DAYS : 




*Denotes peak population. 
















Note: Earliest peak occurred during 3rd week in November in 1953; latest peak occurred during last 
week in December in 1959; average peak occurs about the first week in December. 
3 H 4 4 3 $ : M4 
USE 338,701,635 229,338,960 :31;146,220 234,130,467 221,167,965 220,036,268 :18,756,920 :14,080,850 : 
