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Spawning gravel quality within the Coquitlam River: potential impacts from gravel pit mining Uren, Shane L.

Abstract

Potential spawning sites within the Coquitlam River were evaluated for their ability to support embryos through to the late stages of incubation. Freeze core samples were collected from four sites beginning on December 18, 1997 through to April 14, 1998. Dissolved oxygen and relative permeability data was collected from March 28, 1998 through to April 14, 1998. Sediment traps were also placed at the four sampling locations on March 20, 1998 and removed May 4, 1998 (45 days). Two of the four sites had descriptive measures (%

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