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外文期刊>Canadian water resources journal
>SOME RECENT CHANGES IN BLACK FLY POPULATIONS IN THE SASKATCHEWAN RIVER SYSTEM IN WESTERN CANADA COINCIDING WITH THE DEVELOPMENT OF RESERVOIRS
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SOME RECENT CHANGES IN BLACK FLY POPULATIONS IN THE SASKATCHEWAN RIVER SYSTEM IN WESTERN CANADA COINCIDING WITH THE DEVELOPMENT OF RESERVOIRS
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机译：SOME RECENT CHANGES IN BLACK FLY POPULATIONS IN THE SASKATCHEWAN RIVER SYSTEM IN WESTERN CANADA COINCIDING WITH THE DEVELOPMENT OF RESERVOIRS
In recent years larvae of Simulium luggeri, S. vittatum and S. meridionale have become increasingly abundant whereas the larvae of S. arcticum and S. griseum have become less abundant. Outbreaks of S. luggeri severely affected domestic livestock and man for the first time in 1975 and 1976. These changes were coincidental with the construction of reservoirs regulating 100 of the volume of the South Saskatchewan River and about 50 of the North Saskatchewan. Summertime river volumes and water turbidity have been greatly reduced, presumably affecting the larval habitats of these black flies.
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