Level-ditch study 1979 progress report. R.M .Kaminski and J.F. Giroux.
Material type:
TextPublication details: Winnipeg, MB : 1980. Ducks Unlimited Canada,Description: 30 p. : map ; 28 cmOnline resources: Abstract: Waterfowl use of level-ditched habitat within 8 Ducks Unlimited projects was evaluated in 1979. Numbers of indicated breeding pairs (per km of ditch) ranged from 6 to 24, and averaged 10, resulting in an average cost per duck of $9.37 extrapolated over a 20 year period. A more intensive study at Wilson River Marsh (Dauphin, Manitoba) was undertaken to examine the effects of certain physical and vegetative parameters on waterfowl use and resource levels of aquatic macroinvertebrates.Indicated breeding pair densities were greater within a complex of sinuous ditch segments than within one long straight ditch. Whitetop grass (Scolochloa festucacea) - associated communities contained more pairs and harbored greater aquatic invertebrate abundance than monotypic bulrush (Scirpus spp.). Invertebrate abundance within the ditches were substantially less than levels within the contiguous emergent communities because the ditches presumably were depauperate in organic detritus. Hens experienced g
| Item type | Current library | Collection | Call number | Status | Date due | Barcode |
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Electronic Report
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Electronic Library | Non-fiction | KAM (Browse shelf(Opens below)) | Available | 1106 |
Includes bibliographical references (p. 15-17).
Waterfowl use of level-ditched habitat within 8 Ducks Unlimited projects was evaluated in 1979. Numbers of indicated breeding pairs (per km of ditch) ranged from 6 to 24, and averaged 10, resulting in an average cost per duck of $9.37 extrapolated over a 20 year period. A more intensive study at Wilson River Marsh (Dauphin, Manitoba) was undertaken to examine the effects of certain physical and vegetative parameters on waterfowl use and resource levels of aquatic macroinvertebrates.Indicated breeding pair densities were greater within a complex of sinuous ditch segments than within one long straight ditch. Whitetop grass (Scolochloa festucacea) - associated communities contained more pairs and harbored greater aquatic invertebrate abundance than monotypic bulrush (Scirpus spp.). Invertebrate abundance within the ditches were substantially less than levels within the contiguous emergent communities because the ditches presumably were depauperate in organic detritus. Hens experienced g