iii. Degradation of Fish and Wildlife Populations

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BUI iii Degradation of Fish and Wildlife Populations

Status: Impaired

What was the original problem? Habitat for fish and wildlife was contaminated and temporary. Fish and wildlife communities were not diverse, but were rather dominated by a few overabundant species.
Listing Guideline: When fish and wildlife management programs identify degraded fish or wildlife populations due to a cause within the watershed. In addition, this use will be considered impaired when relevant, field-validated, fish or wildlife bioassays with appropriate quality assurance/quality controls confirm significant toxicity from water column or sediment contaminants.
Delisting Guideline: When environmental conditions support healthy, self-sustaining communities of desired fish and wildlife that would be expected from the amount and quality of suitable physical, chemical and biological habitat. An effort must be made to ensure that fish and wildlife objectives for Areas of Concern are consistent with Great Lakes ecosystem objectives and Great Lakes Fishery Commission fish community goals. Further, in the absence of community structure data, this use will be considered restored when fish and wildlife bioassays confirm no significant toxicity from water column or sediment contaminants.
What Has Been Done?
  • Habitat built: North East Islands (1995-96), LaSalle shoals (1995-96); Windermere Basin (2010-12)
  • Active management: North East Islands and Windermere Basin; cormorants, gulls and geese throughout Hamilton Harbour
How Are Things Today?
These charts show the population dynamics for the targeted colonial water-bird species with the red shaded area showing the recommended target or target range.
What Still Needs To Happen?
  • Ongoing active management to reduce the numbers of ring-billed gulls and cormorants required at some locations
  • Ongoing active management to support common terns, Caspian terns, and herring gulls
  • Habitat being built for common terns and black-crowned night herons at the Windermere Basin marsh (2013)
When Will The Status Change?
  • All colonial waterbird habitat will be completed by 2013 and management efforts will attempt to meet targets by 2020

   For full information on BUI iii (a) & iii (b):
Photo Credit: Royal Botanical Gardens