Abstract: Waterfowl use of 25 ponds blasted in Manitoba's Delta Marsh was studied from 1965-66. Greatest use of the ponds occurred during spring and early summer. In comparison to surrounding wet- lands, there were greater fluctuations in annual abundance, less species diversity, and more breeding pairs per unit of shoreline on the ponds. Ducks stayed on the ponds a mean of 15.6 minutes per visit; 86 percent of their time was spent on elevated spoil. Blue-winged teal (Anas discors) comprised 56 percent of the waterfowl counted. These ponds seemingly functioned as isolation and loafing areas for breeding pairs of dabbling ducks. WATERFOWL UTILIZATION OF PONDS BLASTED AT Abstract: Waterfowl use of 25 ponds blasted in Manitoba's Delta Marsh was studied from 1965-66. Greatest use of the ponds occurred during spring and early summer. In comparison to surrounding wet- lands, there were greater fluctuations in annual abundance, less species diversity, and more breeding pairs per unit of shoreline on the ponds. Ducks stayed on the ponds a mean of 15.6 minutes per visit; 86 percent of their time was spent on elevated spoil. Blue-winged teal (Anas discors) comprised 56 percent of the waterfowl counted. These ponds seemingly functioned as isolation and loafing areas for breeding pairs of dabbling ducks.
Publication Year: 1970
Publication Date: 1970-01-01
Language: en
Type: article
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