2003
DOI: 10.1675/1524-4695(2003)026[0449:bsacom]2.0.co;2
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Body Size and Condition of Male Mallard During Mid-winter in North Dakota, USA

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Cited by 6 publications
(7 citation statements)
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“…Hatch‐year mallards remaining in breeding areas late in fall or throughout winter may be late‐hatched birds and physiologically incapable of migration (Olsen and Cox 2003). Few drake mallards were shot after 1 December in Manitoba, Minnesota, North Dakota, and Saskatchewan ( n = 4 combined), but numerous drake mallards were harvested after that date in South Dakota ( n = 194).…”
Section: Methodsmentioning
confidence: 99%
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“…Hatch‐year mallards remaining in breeding areas late in fall or throughout winter may be late‐hatched birds and physiologically incapable of migration (Olsen and Cox 2003). Few drake mallards were shot after 1 December in Manitoba, Minnesota, North Dakota, and Saskatchewan ( n = 4 combined), but numerous drake mallards were harvested after that date in South Dakota ( n = 194).…”
Section: Methodsmentioning
confidence: 99%
“…A high level of disturbance (e.g., hunting pressure) is among several environmental factors (e.g., ability to thermoregulate and availability of food) that may cause waterfowl to vacate an area in search of habitats that will better enable them to maintain or accumulate nutrient reserves, depending on time of year. Adult drake mallards ( Anas platyrhynchos ) will often stay as far north as possible during fall and winter, assuming conditions are adequate to maintain high levels of lipid reserves (Olsen and Cox 2003). Additionally, some late‐hatching young mallards remain with adults in northern wintering areas, probably because these birds do not have sufficient lipid reserves for migration (Olsen and Cox 2003).…”
Section: Number Of Licensed Waterfowl Hunters In Manitoba and Saskatcmentioning
confidence: 99%
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“…Patterns of changes in the body mass of ducks during winter may vary geographically within a given species depending on local environmental conditions (Perry et al 1986, Hohman and Weller 1994, Olsen and Cox 2003. Usually levels of energetic stores in ducks decline throughout the winter and then increase again prior to spring migration (e.g.…”
Section: Discussionmentioning
confidence: 99%