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Caption: This Chart shows the floating weekly average water temperatures at lower and middle Red Cap Creek (sites 140 and 152, respectively) for the year 2002. The creek warmed approximately 2.4 degrees on its nine mile journey from the middle site to the lower site. Welsh et al. (2001) found that coho are not likely to persist where MWAT exceeds 16.8°C. Temperature data come from automated water temperature data probes placed in the Klamath River and its tributaries by the Klamath National Forest and the Karuk Tribe.
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