270 
Ground Census - Ege Island 
The 1/4-mile wide transects at Egg Island were usually traversed by three 
or four personnel walking abreast. One man with a small boat and outboard motor 
was always at hand to ferry the observers across the larger tidal creeks. When 
weather and tidal conditions were satisfactory, it was possible to cover approxi- 
mately three miles of census line per day, 
Ground Census - Tuckahoe Impoundments 
The brood census method employed in the six fresh-water impoundments at 
Tuckahoe has varied with the water management. For instance, when early draw 
downs were employed, the observers were able to walk through each impoundment 
in a manner similar to that described for the Egg Island area. When high water 
levels were maintained, these areas were covered by boat. 
Success of the Season 
Aerial Transect 
The results obtained from the aerial transects are summarized in Tables I 
and II. In 1951, a single coverage of each stratum was made. In 1952, each 
stratum sampled was covered twice. 
Ground Census - Tuckahoe Impoundments 
Data in regard to brood production in the Tuckahoe impoundments has been 
recorded for the past six years. Annual results which are considered comparable 
are summarized as follows: 
Total Number Average Number 
Year Species Broods Observed of Young 
1952 Black duck 12 7.7 
Wood duck 3 . 5.5 
15 
1951 Black duck 8 5.3 
Wood duck 2 4.0 
Mallard 1 7.0 
Hooded merganser 1 7.0 
12 
1950 Black duck 9 6.1 
Wood duck 2 5.0 
Blue-winged teal ] 6.0 
Mallard 1 5.0 
13 
These figures indicate little change in the annual production within the 
impounded areas. However, late summer observations indicate that brood 
survival in 1952 was exceptionally good, 
