were sampled by ground trancects, the 1949 -ain in duck numbers war about 
On large mareh units 
130 percent on petholes, emall mirshes, and eloughe. 
within the same districts 1t was lees. 
Dicks per Sq. mi. 
Diatrict 



No. Name So, miles 1948 1949 1942 1949 
1. Oxbow 1,116 23.5 54.9 26, 226 60, 264 
2, Souris-Acsiniboine 2,412 1zZ.9 33,4 31,115 #0 BEL 
%, Waekada 1,692 S.4 34,2 14, 200 57, BEG 
5, Seuth Central 7g2 10.7 21.7 474 17,186 
&, FPembina-liger Eitle 1,£12 16.9 46.2 74,192 54,734 
7. dssiniboine Delta 3,240 8.1 5.2 10 044 16,8468 
6, Wewdale-Eriekeon 4,134 56.6 21.4 128,900 336 ,50€ 
18. Red River-Portage 6,976 3.5 1.5 20,916 8,964 
Fiainos 
20, S74 13.2 30.2 274,067 622,931 
Dietrictes & aod 17 (Manitoba low 
nde, 
Figures comparing 1948 and 1949 duck densities on some of Manitoba's 
largs marshes are given below: 
Ducks per square mile 
Mareh Le4e 1949 Gain or Lose 
Whitewater Lake 121 60 -45% 
Big Grace sO #5 £70% 
Netley 45 120 f1e7% 
Saskatchewan Del te 32 69 #115% 
De. ta BO 156 #95% 
The greatest ratee of gain were noted on the deltas of the Hed River 
ant the Saskatchewan River which were badly flooded in 1948, Lorses at White- 
water Lake presumably related to flooded condition of the lake and the unusually 
favoratle habitat on the farm lande surrounding It. 
Ducks per mile of ahoreline ehowed increases ac follows: 
Lake ]o46 1946 Percent In¢erease 
Waterhen 9,1 ead aeg 
Siaib Bae 12.5 one 
Chitek 6,2 26.1 uae 
Felicen Fay 4.2 6.2 48 
Pelican Lake 4.7 14,0 194 
It is apparent from the foregoing data that on moet of the large lakee 
and marshes substantial increases were recorded. Feference was made earlier 
in this report to decreases aecoclated with lower water levels, throughout 
most of the Manitoha lowlands except in the large permanent marshes. In May 
194% the smal) water arene of this basin were numbered in the thousands; this 
year they were comparatively searce. The earple, exclusive of large marshes, 
within this lowland type (Districts 11, 168, and 17) amounted to 78.5 square 
Miles, The duck density found war 4,4 per sousre mile, roughly 4 third of 
last year's index figure. An ares approaching 10,000 sousre miles is involved 
in thie deline, The reduction js from aporoximateis 130,000 leat year to 
6] 
