| Abstract: | Time activity budget studies were conducted on captive Canvasbacks manintained on ad libitum diets with varying levels of protein and energy during the winter of 1978-79 and 1979-80. No differences could be detected in the behaviour of the ducks as a result of the diets they received. Differences due to season and sex were observed for some behaviours. Activity decreased (P<0.05) during the winter apparently as a mechanism to conserve energy. This decrease occurred in mid-winter irrespective of diet quality and appeared to be an endogenous component of the Canvasbacks‘ annual cycle. This behaviour pattern has been observed in the wild and seems to persist in captive Canvasbacks. |
| Genre: | Article |
| ProdID: | 5222303 |
| Citation Author: | Perry, M.C.; Williams, B.K.; Obrecht, H.H., III |
| Citation Contributing Office: | Patuxent Wildlife Research Center |
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| Citation End Page: | 87 |
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| Citation Language: | English |
| Citation Larger Work Title: | Wildfowl |
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| Citation Number Of Pages: | 8 |
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| Citation Phsyical Description: | 80-87 |
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| Citation Public Comments: | 3798_Perry.pdf |
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| Citation Search Results Text: | Behaviour of captive canvasbacks Aythya valisineria fed different diets during winter; 1989; Article; Journal; Wildfowl; Perry, M.C.; Williams, B.K.; Obrecht, H.H., III |
| Citation Start Page: | 80 |
| Citation Volume: | 40 |
| Citation Year: | 1989 |
| Type: | citation/reference |
| Text: | Behaviour of captive canvasbacks Aythya valisineria fed different diets during winter; 1989; Article; Journal; Wildfowl; Perry, M.C.; Williams, B.K.; Obrecht, H.H., III |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Wed, 16 Jun 2010 12:19 -0500 |
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