Breeding ecology of northern pintails: nesting ecology, nest-site selection, nutrient reserve use and brood ecology / Karla Lee Guyn
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TextPublication details: Saskatoon, SK : University of Saskatchewan, 2000.Description: xii, 139 leaves ; 29 cm. illSubject(s): Online resources: Dissertation note: Thesis (Ph.D.)--University of Saskatchewan, 2000 Abstract: To better understand the life-history of Northern Pintails (Anas acuta),and the evolutionary forces that may have shaped it, I examined constraints and consequences of breeding-season decisions. General patterns and trade-offs over time and energy use were evaluated for nutrient reserve allocation to egg formation, nest-site selection,nesting effort and raising offspring. To meet nutritional demands of egg laying, female pintails obtain nutrients from either exogenous or endogenous sources. I examined use of nutrient reserves during egg formation in pintails and tested whether reserves regulated clutch size.I found that females relied heavily on fat reserves during egg laying,but found no evidence that fat, or protein, proximately limited clutch size.
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Thesis (Ph.D.)--University of Saskatchewan, 2000
Includes bibliographical references (leaves 104-126).
To better understand the life-history of Northern Pintails (Anas acuta),and the evolutionary forces that may have shaped it, I examined constraints and consequences of breeding-season decisions. General patterns and trade-offs over time and energy use were evaluated for nutrient reserve allocation to egg formation, nest-site selection,nesting effort and raising offspring. To meet nutritional demands of egg laying, female pintails obtain nutrients from either exogenous or endogenous sources. I examined use of nutrient reserves during egg formation in pintails and tested whether reserves regulated clutch size.I found that females relied heavily on fat reserves during egg laying,but found no evidence that fat, or protein, proximately limited clutch size.