Pintail brood hen behaviour : patterns of parental investment / Shirley Jane Rushforth.
Material type:
TextSeries: Thesis. (M.Sc.)Publication details: Winnipeg, MB : University of Manitoba, 1980.Description: viii, 68 leaves : ill. ; 28 cmOnline resources: Abstract: Parental time investment by pintail (Anas acuta) brood hens was studied at Oak Hammock Marsh, Manitoba during the summer of 1979. Behaviours directly related to brood care and maintenance of the hens' physical condition were combined to form a parental investment and self maintenance category respectively. The data were analyzed with respect to brood size, brood age and time of year. Approximately 50% of the hens' time (during observation periods) was spent feeding. Subsurface feeding was more commonly used to obtain food than was surface feeding.Hens spent more time investing in themselves than in the brood.Monitoring brood position was the most time consuming component of parental investment. Hens with small broods spent more time subsurface feeding than hens with larger broods. Brood size had no effect on the remaining behaviours or on parental investment and self maintenance.Hens spent more time surface feeding with downy young than with feathered young and more time subsurface
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Electronic Report
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Thesis(M.Sc.)--University of Manitoba, 1980.
"October 1980."
Includes bibliographic references (leaves 52-61).
Parental time investment by pintail (Anas acuta) brood hens was studied at Oak Hammock Marsh, Manitoba during the summer of 1979. Behaviours directly related to brood care and maintenance of the hens' physical condition were combined to form a parental investment and self maintenance category respectively. The data were analyzed with respect to brood size, brood age and time of year. Approximately 50% of the hens' time (during observation periods) was spent feeding. Subsurface feeding was more commonly used to obtain food than was surface feeding.Hens spent more time investing in themselves than in the brood.Monitoring brood position was the most time consuming component of parental investment. Hens with small broods spent more time subsurface feeding than hens with larger broods. Brood size had no effect on the remaining behaviours or on parental investment and self maintenance.Hens spent more time surface feeding with downy young than with feathered young and more time subsurface