Fisheries monitoring and biological data of the Yellowknife River cisco (Coregonus artedi) population, 1999-2020 / by Ellen V. Lea, Cameron Stevens, Collin Arens, and Colin P. Gallagher.: Fs97-4/3268E-PDF

"Cisco (Coregonus artedi) from the Yellowknife River, Northwest Territories, are an important fishery resource for nearby communities. Biological, catch-effort, and environmental data were collected from the Yellowknife River (Tartan Rapids and Bluefish areas) during their fall spawning run from Great Slave Lake. Data from the commercial harvest (fishery-dependent; 1998-2000) and supplementary monitoring (fishery-independent; 2013-2020) of these adfluvial Cisco were compiled to summarize commercial fishery quotas and reported harvest, characterize population demographics and catch-effort over time, and assess potential associations between relative abundance and seasonal river characteristics. A single commercial fishing licence for Cisco was issued on an annual basis each fall for 1,000 kg from 1998-2002, 2,000 kg from 2004-2005, 1,000 kg from 2010-2018, and 1,500 kg from 2019-2020. Cisco ranged from 102-239 mm fork length, 10.0-139.6 g round weight, and 1 and 9 years of age, with the majority of fish (>99%) being sexually mature. The demographics (length, weight, age) of the spawning population collected from the commercial fishery remained relatively stable between 1999 and 2020. Catch-effort of the commercial fishery varied widely among years without trend, although this was not standardized to the number of individuals/nets used to capture the fish. The biological, catch-effort, and environmental data collected from the Yellowknife River spawning population of Cisco serve as a benchmark for their ongoing assessment and management"--Abstract, page vii.

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