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11-08-2010, 03:12 PM #1
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Impacts of log storage upon epilimnetic dissolved oxygen and juvenile sockeye salmon
By David A. Levy, Itsuo Yesaki, Blair Christensen
Water Research, Volume 24, Issue 3, March 1990, Pages 337-343, ISSN 0043-1354, DOI: 10.1016/0043-1354(90)90010-4.
Limnological conditions and habitat use by juvenile sockeye salmon were monitored both prior and subsequent to the development of a log transportation system in Babine lake. Hypoxic conditions developed in the epilimnion as water temperatures increased following the spring thaw in 1985. Deoxygenation was attributed to respiration by bacteria which formed a gelatinous slime layer on the underside of submerged logs. The observed decrease in juvenile sockeye salmon numbers in affected areas of the log dump site appeared to be a response to epilimnetic hypoxia.
Keywords: log storage; juvenile sockeye salmon; hypoxia; fish avoidance; epilimnion