The ecology of the lesser scaup (Aythya affinis eyton) in southwestern Manitoba / Gordon Stanley Hammell.
Material type:
TextSeries: Thesis ; (M.Sc.)Publication details: Guelph, ON : University of Guelph, 1973.Description: xi, 156 leaves : ill. ; 28 cmOnline resources: Abstract: The relationship of the lesser scaup to parkland pond habitat in southwestern Manitoba was studied during 1970 and 1971. Adult breeding behaviour was investigated using marked birds. Changes in the type,intensity, and number of interactions were related to 3 periods of the breeding cycle: migration, pre-nesting, and early nesting. A moving territory was described for lesser scaup pairs. Minimum home ranges of pairs varied from 26 to 166 ha with a mean of 89+-6.5 (se) ha. Pairs spent the majority of time on permanent ponds. Non- permanent ponds were used during nest-site selection activities. With few exceptions,unpaired males used permanent ponds only. Use of 4 size-classes of permanent ponds (size-class 1, <0.8 ha; size-class 2, 0.9-1.6 ha;size-class 3, 1.7-2.8 ha; size-class 4, 2.9-8.9 ha) by pairs and unpaired males varied from the migration period through pre-nesting.During pre-nesting, movement away from larger to smaller permanent ponds were observed. A greater percentage of
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Thesis(M.Sc.)--University of Guelph, 1973.
Includes bibliographical references.
The relationship of the lesser scaup to parkland pond habitat in southwestern Manitoba was studied during 1970 and 1971. Adult breeding behaviour was investigated using marked birds. Changes in the type,intensity, and number of interactions were related to 3 periods of the breeding cycle: migration, pre-nesting, and early nesting. A moving territory was described for lesser scaup pairs. Minimum home ranges of pairs varied from 26 to 166 ha with a mean of 89+-6.5 (se) ha. Pairs spent the majority of time on permanent ponds. Non- permanent ponds were used during nest-site selection activities. With few exceptions,unpaired males used permanent ponds only. Use of 4 size-classes of permanent ponds (size-class 1, <0.8 ha; size-class 2, 0.9-1.6 ha;size-class 3, 1.7-2.8 ha; size-class 4, 2.9-8.9 ha) by pairs and unpaired males varied from the migration period through pre-nesting.During pre-nesting, movement away from larger to smaller permanent ponds were observed. A greater percentage of