منابع مشابه
Measuring Waterfowl Habitat- Population Changes from Aerial Photos
-.. .. _Measuring Waterfowl Habitat ~pulation Changes From Aerial Photos Harvey \IT. Miller Nebraska Game Commission Bassett, Nebraska A survey was conducted in 1953 to determine the feasibility of using aerial photography to measure the trends in available waterfowl habitat in the Nebraska Sandhills. This pilot survey included 96 one-square-mile sections systematically distributed over the are...
متن کاملEffectiveness of voluntary habitat stewardship in conserving grassland: case of operation burrowing owl in Saskatchewan.
There have been no published performance evaluations of nongovernmental, voluntary habitat stewardship programs. The Operation Burrowing Owl (OBO) stewardship program, initiated in 1987, was evaluated for its effectiveness in conservation of grassland habitat during 1986-1993. The 108 OBO sites from 1987 to 88 and 98 randomly selected non-OBO sites that were grassland in 1986 in the Regina-Weyb...
متن کاملWaterfowl–habitat associations during winter in an urban North Atlantic estuary
Coastal habitats near urban centres in North Atlantic estuaries often support substantial numbers of wintering waterfowl, but little is known of the effects of landscape setting and urbanisation on habitat use. We conducted surveys of waterfowl at 32 wintering sites in Narragansett Bay, Rhode Island, to identify characteristics that may influence habitat use. Sites were chosen along a gradient ...
متن کاملLead poisoning in waterfowl.
proventriculus-gizzard contents. Most pellets were irregular in shape and in various stages of erosion, There was no apparent correlation between body weight and the amount of lead shot per bird. Liver discoloration was a remarkable gross finding. The entire liver parenchyma was uniformly colored dark green. Bile-colored viscous fluid oQzed from the cut surface of the liver, There was moderate-...
متن کاملUsing river flow management to improve wetland habitat quality for waterfowl on the Mississippi River, USA
In an effort to improve wetland conditions on the highly regulated Upper Mississippi River, the U.S. Army Corps of Engineers conducted an experiment that involved using navigation dams to restore the stable, summer low water portion of the natural flow regime that would expose soil and permit establishment of moist-soil plant species. Plant response was measured and waterfowl surveys and behavi...
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ژورنال
عنوان ژورنال: Blue Jay
سال: 1957
ISSN: 2562-5667,0006-5099
DOI: 10.29173/bluejay1719