Abstract
In a brown-water stream of Alberta, white sucker (Catostomus commersonii) fry moved downstream almost entirely at night. During June and July when the fry were moving downstream, their nocturnal "drift" pattern was more pronounced than that of any of the drifting invertebrates; and at this time their total biomass crossing a width transect per 24 hr exceeded the combined total biomass of the drifting invertebrate taxa. As the fry became larger, many more moved downstream near the surface of the water than near the stream's substrate.
Publisher
Canadian Science Publishing
Cited by
30 articles.
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