
MISSISSIPPI FLYWAY 
Total Species Index - Entire Area Surveyed , 1954-1955 
OE a a 
Change Percent 


Species Index 2-Year From From 
Species 1954 1955 Average 1954 Average 
Mallard 255,530 249,093 252,311 = 2&5 - 1.3 
Black Duck 92, 706 74, 839 83,772 - 19.3 - 10.6 
Gadwall - 1,165 582 - +100. 1 
Baldpate 25,591 32,559 29,075 + 27.2 + 12.0 
Pintail 22,099 47,108 34, 603 4113.2 + 36.1 
G-w. Teal 5, 835 13,486 9, 660 4131.1 + 39.6 
B-w. Teal 8,514 4,208 6, 361 - 50.6 - 33.8 
Shoveler 3,138 1,008 2,073 - 67.8 - 50.4 
Merganser 244,115 309, 840 276,977 + 26.9 + 11.9 
Redhead 7,597 10, 340 8,968 + 36.1 + 15.3 
Ringneck 39, 825 80,178 60,001 +101.3 + 33.6 
Canvasback 18,151 21,525 19, 838 + 18.6 + 8.5 
L. Scaup 265,930 441,062 353,496 + 65.8 + 24.8 
Goldeneye 48, 389 37,785 43,087 ~ 21.9 - 12.3 
Ruddy Duck 2,957 - 1,478 - - 
Bufflehead 23,291 39,050 31,170 + 67.7 + 25.3 
Scoter 42,941 49,091 46,016 + 14.3 + 6.7 
Total Ducks 1,106,609 1,412, 337 1,259,473 + 27.6 + 12.1 
Canada goose 28,417 23,566 25,991 =~ 7.1. = 10.3 
Production Indices - 
During July, 7236 lineal miles of transect was flown and resulted 
in the following data: 
Summary of Brood and Potential Later Brood Information - July 1955 
Observed 
Class ** Total Computed for Stratum 
Stratum No. Broods II & III Young PLB* Total Young PLB* 
Ontario C 51 6.7 341.7 49 123,729 17, 743 
Manitoba C 54 6.2 334.8 87 58,958 29,128 
Manitoba D 53 7.6 402.8 142 29,525 10, 408 
Sask. C South 70 4.6 322.0 74 45,820 10, 530 
Sask. C North 19 7.0 133.0 22 80, 066 13, 244 
Total 6.2 1534.3 374 338,098 81,053 
* Potential later broods 
Average number per brood 
63 
