Global Short Term Trend: Decline of 10-30%
Comments: Of 2594 stocks in British Columbia and Yukon, Slaney et al. (1996) categorized 29 as extirpated, 214 as high risk, 22 as moderate risk, 21 as special concern, 1024 as unthreatened, and 1284 as unknown status. In the 1900s, indigenous, naturally reproducing populations are believed to have been extirpated in nearly all Columbia River tributaries and to be in decline in numerous coastal streams in Washington, Oregon, and California; at least 33 populations have been identified by agencies and conservation groups as being at moderate to high risk of extinction (NMFS 1995); at least 15 stocks in the contiguous U.S. have been extirpated (Nehlsen et al. 1991). Wild fish are increasingly rare throughout the range, especially at the southern and eastern parts of the range (see Nehlsen et al. 1991 for a review of the status and declines of these populations). Stable or increasing in a portion of northern California and in northwestern Washington; special concern, threatened, endangered, or extirpated elsewhere (see map in Frissell 1993). In California, populations fluctuate, but the general trend seems to be downward for wild, short-run populations in small coastal streams.
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