Since the fall of 2003, the Yurok Tribe has monitored for disease among fall-run Chinook salmon in the Lower Klamath River with an emphasis on Ich and Columnaris— diseases caused by parasites that are believed to be endemic to the Klamath Basin. In general, healthy fish are resistant to Columnaris. Columnaris is observed among adult Chinook salmon in the Klamath River every year to some extent; whereas the outbreak of Ich in the Lower Klamath River during 2002 was unprecedented.
Suggested further reading:
True, K; Foott, J S; Bolick, A; Benson, S; and Fogerty, R (2010) Myxosporean parasite (Ceratomyxa shasta and Parvicapsula minibicornis) incidence and severity in Klamath River basin juvenile chinook salmon, April-August 2009.
CDFG (2004) September 2002 Klamath River fish-kill: final analysis of contributing factors and impacts.
Nichols, K; Therry, D; and Foott, S (2003) Trinity River fall chinook smolt health following passage through the lower Klamath River, June – August 2002.
CDFG (2003) September 2002 Klamath River fish kill: preliminary analysis of contributing factors.
Foott, J S (1997) Renibacterium salmoninarum and Nanophyetus metacercaria infection in adult chinook salmon: Trinity River Hatchery broodstock (1992-94, 1996), Klamath estuary net harvest and KMZ ocean sport catch in 1996.
Foott, J S; Free, D; Talo, W; and Williamson, J D (1996) Physiological effects of Nanophyetus metacercaria infection in chinook salmon smolts (Trinity River).
Foott, J S and Walker, R L (1991) Disease survey of Trinity River salmonid smolt populations.