A study of waterfowl production on two rest rotation grazing units in northcentral Montana / Frank Mathew Gjersing
Material type:
TextSeries: Thesis. (M.S.)Publication details: Bozeman, MT : Montana State University, 1971.Description: viii, 42 leaves : ill. ; 28 cmOnline resources: Abstract: A study of waterfowl production on reservoirs in two rest-rotation grazing systems was conducted in Phillips County, Montana from 1968-1970. Five reservoirs, subjected to normal grazing, were selected as controls outside of each area. Pair populations increased during the years of census with the greatest increase between years occurring on the south area in pasture 4 which was rested the previous year. A decrease on this area occurred in pasture 5 which was grazed north area occurred in those pastures which were grazed during the fall of two consecutive seasons. Brood production increased over the three year period on the rest- rotation areas but controls remained fairly constant on the south area and increased on the north area. Largest increases in brood production between years occurred in pasture 4 of the south area from 1969-70. Average brood size was less on controls than on the rest-rotation pastures. With an average of 6 ducks per brood, about 9 ducks per acre of water were p
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Thesis(M.S.)--Montana State University, 1971.
Includes bibliographical references (leaves 41-42).
A study of waterfowl production on reservoirs in two rest-rotation grazing systems was conducted in Phillips County, Montana from 1968-1970. Five reservoirs, subjected to normal grazing, were selected as controls outside of each area. Pair populations increased during the years of census with the greatest increase between years occurring on the south area in pasture 4 which was rested the previous year. A decrease on this area occurred in pasture 5 which was grazed north area occurred in those pastures which were grazed during the fall of two consecutive seasons. Brood production increased over the three year period on the rest- rotation areas but controls remained fairly constant on the south area and increased on the north area. Largest increases in brood production between years occurred in pasture 4 of the south area from 1969-70. Average brood size was less on controls than on the rest-rotation pastures. With an average of 6 ducks per brood, about 9 ducks per acre of water were p