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Factors associated with duck nest success in the prairie pothole region of Canada
Populations of some dabbling ducks have declined sharply in recent decades and information is needed to understand reasons for this. During 1982-85, we studied duck nesting for 1-4 years in 17 1.6 byExpand
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LANDSCAPE COMPOSITION, PATCH SIZE, AND DISTANCE TO EDGES: INTERACTIONS AFFECTING DUCK REPRODUCTIVE SUCCESS
Prairies and other North American grasslands, although highly fragmented, provide breeding habitat for a diverse array of species, including species of tremendous economic and ecological importance.Expand
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Importance of individual species of predators on nesting success of ducks in the Canadian Prairie Pothole Region
We followed 3094 upland nests of several species of ducks. Clutches in most nests were lost to predation. We related daily nest predation rates to indices of activity of eight egg-eating predators,Expand
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Distribution and abundance of predators that affect duck production: Prairie Pothole Region
Abstract : During 1983-88, the relative abundance of 18 species and species-groups of mammalian and avian predators affecting duck production in the prairie pothole region was determined in 33 widelyExpand
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Relationships of habitat patch size to predator community and survival of duck nests
We studied duck nest success and predator community composition in relation to size of discrete patches of nesting cover in the Prairie Pothole Region (PPR) of the United States in 1993-95 We focusedExpand
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Predator selection of prairie landscape features and its relation to duck nest success
Mammalian predation is a major cause of mortality for breeding waterfowl in the U.S. Northern Great Plains, and yet we know little about the selection of prairie habitats by predators or how thisExpand
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Wetland use, settling patterns, and recruitment in mallards
The correlation between number of May ponds in the Prairie Pothole Region (PPR) of North America and size of the continental mallard (Anas platyrhynchos) breeding population the following springExpand
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Interpreting Evidence of Depredation of Duck Nests in the Prairie Pothole Region
Abstract : We examined patterns of depredation of duck nests by 9 species and 2 congeneric species-groups of predators in the Prairie Pothole Region: coyote (Canis latrans), red fox (Vulpes vulpes),Expand
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Hormonal predictors of postnatal depression at 6 months in breastfeeding women
Postnatal depression occurs in 10-15% of postpartum women. Studies have shown associations with endogenous hormone levels (oestrogen, progesterone, cortisol and thyroxin) and with autoimmune thyroidExpand
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Nocturnal activity and foraging of prairie raccoons (Procyon lotor) in North Dakota
Nocturnal activity and foraging of 39 radio-equipped raccoons (Procyon lotor) in eastern North Dakota were studied from April-July in 1974-1976. Sixteen of the raccoons were collected after foragingExpand
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