49 
WATERFOWL BREEDING GROUND SURVEY 
BY 
MANITOBA. GAME BRANCH CONSERVATION OFFICERS, 1950 
E. N,. Cole 
In 1950, for the third consecutive year, Manitoba Conservation Officers, 
directed by G. W. Malaher and A. P. Davey, made waterfowl counts along fixed 
transect lines. A map showing the location of these transects is presented in Special 
Scientific Report: Wildlife No. 2 (1949) facing page 70. The following tables show 
comparison of data obtained in 1948, 1949, and 1950. : 
Inventory Districts 1, 2, 3, and 8 
(Farmland pothole country) - The figures show ducks per square mile. 
YEAR ter. -f L.B. 2 ILD. 3° I.D. 8 -AILI.D.'s %Inc. or Decr. 
1948 23.6 13,3 8.1 43.8 18,0 
1949 53.5 38.6 35.5 74,1 49.2 # 173.3 % 
1950 77.5 61.0% 24.6 79.4 59.9 fH 21.7% * 
*It is evident from Conservation Officer Serafin's report that his 
figures happened to include a mass movement of blue-winged teal 
through the district. Biologist figures from the same district 
obtained shortly before and shortly after Serafin's counts, agree 
closely except in blue-wings. If a correction is applied for this 
discrepancy, the rate of increase indicated (21.7 percent) drops 
from 12 to 15 percent. . 
Delta Marsh 
Ducks per mile of Transect: 
Year May June 
1948 51.9 59.0 
1949 «94.6 49, 3% 
1950 o- 63.3 28% Increase. 
* In Special Scientific Report: Wildlife No. 2, this figure is shown 
a a eee ee ene 
to be 40.1. This is a typographical error. 
Netley Marsh 
Netley Marsh showed an increase of 53. 3 percent in 1949 over 1948, This 
year, due to extremely high water levels, coverage of regular transects was impossible, 
but a marked decline was apparent. 
