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Report Archive2005 Monitoring and Outreach Report
Slocan Rainbow Trout Enhancement Program: Riparian Restoration Component: Summary for 2005
Slocan River Streamkeepers Diary for 2005
Monitoring Spawning Rainbow Trout and Redd Counts in the Slocan River: 2003 - 2006 The Slocan Rivers Streamkeepers have begun long term monitoring of a variety of environmental and biological variables in the river to serve as a baseline from which to monitor ecological change. We identified spawning productivity of rainbow trout (Oncorhynchus mykiss) as a reasonable measurement of ecosystem health and therefore a valuable biological variable to monitor over time. The intent of this survey is to collect data for comparison from year to year at the same location (relative abundance) versus determining total productivity throughout the river. 4 pages. (0.1 mb)
Slocan River Rainbow Trout Population Assessment: 2005 Monitoring of the Slocan River rainbow trout (Oncorhynchus mykiss) population began in 1985. In 1993 the river was closed to angling based on previous assessments that demonstrated the population was in severe decline. Since the closure, the population has increased but still displays a high variability in population size and structure. This variability may be explained in part by the variability of summer water temperatures, whereby in certain years a temperature threshold is exceeded causing trout mortality and/or a reduction in fitness. The one consistency in the data is that the Lemon Creek index site produces a significantly greater number of trout in all age/size classes than any of the other index sites. 19 pages. (0.2 mb)
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