WALLEYE – Habitat Degradation factor
From The Status of
Walleye in Nipigon Bay Area of Concern: 2012
Prepared for Environment Canada by Terry
Marshall Marshall Consulting March 31,2013
Factors related to the Walleye decline in Nipigon Bay
Habitat degradation
In a
historical review of Nipigon Bay Walleye, Wilson[1991] detailed the many
habitat alterations that affected this population. The logging industry contributed through
damming, deforestation, sedimentation, the accumulation of wood fibre, bark,
and other organic matter from historic log drives, and DDT contamination. The creation of hydroelectric generating
stations segmented the Nipigon River isolating fish populations and the altered
flow regimes affected stream bank stability, sediment load and the quality of
fish and wildlife habitat. Effluent
discharges from municipal sewage treatment plants and a kraft pulp and paper
mill were also implicated in the demise of the walleye fishery [Ryder 1968]
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