Cumberland House waterfowl surveys : Jeffrey W. Nelson and Dave W. Phillips. using helicopter transects 1980 - 1982 /
Material type:
TextPublication details: Winnipeg, MB : 1983. Ducks Unlimited Canada,Description: vi, 64 p. : ill. , maps ; 28 cmOnline resources: Abstract: Annual variations in breeding waterfowl abundance have been monitored at the Cumberland House Marshes, Saskatchewan since project completion in 1979. A pilot study during 1980 investigated the potential for using a helicopter to survey line transects. Development of a bubble calibration device allowed placement of birds into perpendicular distance categories. Indicated breeding pairs were calculated from social groupings observed during survey(s) conducted during peak nest initiation periods for each species. Pair densities were estimated as 0.64 pairs/ha (90% C.I. = +/- 0.07) and 0.59 pairs/ha (90% C.I. = +/-0.14) during 1981 and 1982, respectively. Brood density, using strip transects, was estimated as 0.10 broods/ha during 1981. Based on transect theory, 1982 brood density was estimated as 0.14 broods/ha (90%C.I. = +/- 0.4). Through experience the monitoring program has been streamlined to date as follows: 1) distance categories have been narrowed to meet TRANSECT assumptions, 2)
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Electronic Report
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Electronic Library | Non-fiction | NEL (Browse shelf(Opens below)) | Available | 1201 |
Includes bibliographical references (p. 33-34).
Annual variations in breeding waterfowl abundance have been monitored at the Cumberland House Marshes, Saskatchewan since project completion in 1979. A pilot study during 1980 investigated the potential for using a helicopter to survey line transects. Development of a bubble calibration device allowed placement of birds into perpendicular distance categories. Indicated breeding pairs were calculated from social groupings observed during survey(s) conducted during peak nest initiation periods for each species. Pair densities were estimated as 0.64 pairs/ha (90% C.I. = +/- 0.07) and 0.59 pairs/ha (90% C.I. = +/-0.14) during 1981 and 1982, respectively. Brood density, using strip transects, was estimated as 0.10 broods/ha during 1981. Based on transect theory, 1982 brood density was estimated as 0.14 broods/ha (90%C.I. = +/- 0.4). Through experience the monitoring program has been streamlined to date as follows: 1) distance categories have been narrowed to meet TRANSECT assumptions, 2)