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Status of whirling disease in the Crowsnest River : technical report, 2019

Description

The Crowsnest River became a provincial priority to understand the impact of whirling disease on rainbow trout populations, prompting a comprehensive study of the watershed in 2019. Results of the... More ≫

Description

The Crowsnest River became a provincial priority to understand the impact of whirling disease on rainbow trout populations, prompting a comprehensive study of the watershed in 2019. Results of the study are contained in this report. The objectives of this study were to: determine the spatial distribution, infection prevalence and severity of Mc in the Crowsnest River; measure triactinomyxon density in free-flowing water; characterize oligochaete relative abundance throughout the Crowsnest River; measure the timing and location of optimal water temperatures for parasite development and transmission; and estimate density and age-class structure of juvenile rainbow trout. The Crowsnest River is a high-value sport fishery in southern Alberta.

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Aquatic ecosystem health assessment of the Athabasca River mainstem and tributaries using fish health and fish and invertebrate toxicological testing

Description

Results from the Joint Oil Sands Monitoring plan presented here address the need to develop a comprehensive and robust biomonitoring program for fish and toxicity in fish and invertebrates. Fish... More ≫

Description

Results from the Joint Oil Sands Monitoring plan presented here address the need to develop a comprehensive and robust biomonitoring program for fish and toxicity in fish and invertebrates. Fish health monitoring was conducted along the mainstem of the lower Athabasca River and its primary tributaries to assess spatial and temporal change in ecological condition within these aquatic habitats.

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