Species composition, emergence phenologies, and relative abundances of chironomidae (diptera) from the Delta Marsh, Manitoba, Canada / Dale Arthur Wrubleski.
Material type:
TextSeries: Thesis. (M.Sc.)Publication details: Winnipeg, MB : University of Manitoba, 1984.Description: xv, 115 p. : ill. (some col.) ; 28 cmOnline resources: Abstract: A study was conducted to provide baseline information on the Chironomidae of the Delta Marsh, as part of the larger Marsh Ecology Research Program (MERP) of the Delta Waterfowl Research Station and Ducks Unlimited Canada. Emerging adult chironomids were collected with floating tent traps from a shallow, semi-isolated bay of the marsh, in 1980 and 1981. Three habitats common to northern prairie marshes were sampled: shallow open water with sago pondweed (Potamogeton pectinatus L.), cattail (Typha glauca Codr.), and hardstem bulrush (Scirpus acutus Muhl.). Five traps were used in each habitat. The trapping regime used was adequate for general descriptions of chironomid emergence. However,if a desired level of precision were required for estimating abundances (e.g. +- 30% of the mean), five traps in the open water-pondweed habitat would be sufficient, but very large numbers of traps would be required in cattail and bulrush habitats. In a test of the collecting head efficiency, 84% of al
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Includes bibliographical references (p. 102-110).
A study was conducted to provide baseline information on the Chironomidae of the Delta Marsh, as part of the larger Marsh Ecology Research Program (MERP) of the Delta Waterfowl Research Station and Ducks Unlimited Canada. Emerging adult chironomids were collected with floating tent traps from a shallow, semi-isolated bay of the marsh, in 1980 and 1981. Three habitats common to northern prairie marshes were sampled: shallow open water with sago pondweed (Potamogeton pectinatus L.), cattail (Typha glauca Codr.), and hardstem bulrush (Scirpus acutus Muhl.). Five traps were used in each habitat. The trapping regime used was adequate for general descriptions of chironomid emergence. However,if a desired level of precision were required for estimating abundances (e.g. +- 30% of the mean), five traps in the open water-pondweed habitat would be sufficient, but very large numbers of traps would be required in cattail and bulrush habitats. In a test of the collecting head efficiency, 84% of al