Waterfowl production from winter wheat fields in North and South Dakota
نویسندگان
چکیده
منابع مشابه
Salt toxicosis in waterfowl in North Dakota.
About 150 waterfowl died and another 250 became weak and lethargic from suspected salt poisoning after using White Lake, a highly saline lake in Mountrail County, North Dakota. Frigid temperatures made fresh water unavailable, forcing the birds to ingest the saline waters with resultant toxic effects. Sick birds recovered when removed from the salt water and released into fresh water marshes. B...
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T problem of the extent to which the children of aged, needy persons should contribute to their support has been a persistent one in the administration of public assistance since the days of the Elizabethan poor law and even earlier. In recent years this problem has acquired a new urgency because of the mounting cost of old-age assistance. The response to the problem has varied considerably amo...
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-Survival characteristics of 25 broods of Mallards (Anas platyrhynchos) were determined on a study area in the Missouri Coteau of south-central North Dakota in 1976-1977. Radio-equipped Mallard hens fledged at least one duckling in 7 of 16 (44%) broods produced in 1976, 5 of 9 (55%) in 1977, and 12 of 25 (48%) for both years combined. Of the 13 broods in which all young were lost, 11 (85%) were...
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This study quantifies the agronomic benefits of foraging waterfowl in winter flooded rice fields in the Sacramento Valley of California (US). Fifteen winter flooded rice fields along a 105 km long transect, each with five pairs of waterfowl exclosures and control plots were used to measure residue decomposition in spring, and weed biomass and grain yield at harvest. Experimental exclusion of wa...
متن کاملDiet and Gut Morphology of Male Mallards During Winter in North Dakota
—A free-ranging Mallard (Anas platyrhynchos) population was investigated during winter (DecemberJanuary 1996-1999) below the Garrison Dam, North Dakota, USA, to relate diet to gut morphology variation in males. Four explanatory variables (fish consumption, male age, winter, and body size) were evaluated as to whether they influenced five response variables associated with gut characteristics of...
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ژورنال
عنوان ژورنال: The Journal of Wildlife Management
سال: 2015
ISSN: 0022-541X
DOI: 10.1002/jwmg.993