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    Controlled flow, temperature and brook trout (Salvelinus fontinalis Mitchell) fry emergence on the Aguasabon River, Terrace Bay, Ontario, 2011-2016

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    HauserA2017b-1b.pdf (4.147Mb)

    Date

    2017

    Author

    Hauser, Allison Hanna

    Degree

    Honours Bachelor of Environmental Management

    Discipline

    Natural Resources Management

    Subject

    Aguasabon river
    Brook trout
    Drift netting
    Fry emergence
    Hydroelectric dam
    River flow

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    Abstract

    This thesis reviews factors that affect brook trout (Salvelinus fontinalis Mitchell) fry emergence and their relevance to population fitness. A series of drift nets were deployed from 2010 to 2016, April through May, on the Aguasabon River, near Terrace Bay, Ontario, to capture brook trout fry drifting downstream. Fry were live captured, counted and released alive each year. The drift nets recorded flow, and nearby data loggers recorded temperature of the redd. Graphical review of these data was used to determine any significant relationships between brook trout drift, net flow and temperature. Flow does not affect temperature, but brook trout fry respond numerically to an optimal temperature, and high flows encourage drifting. These relationships are described relative to management of an impounded brook trout spawning stream.

    URI

    http://knowledgecommons.lakeheadu.ca/handle/2453/4367

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