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This map shows a summary of the presence/absence of coho salmon young-of-the-year in streams in the Russian River basin for the years 1988-1999, displayed with
KRIS sub-basins and 1:100,000 scale streams. During this time period, coho salmon were detected at least once in only 17 of the 46 historical coho streams, indicating a
substantial decline in coho salmon distribution from historical levels in the basin. This map contains data for all the streams listed as known historically to harbor coho
salmon in a draft California Department of Fish and Game database. Absence data are provisional pending more extensive study, because coho may exist in some
streams but only occur in some years or may have resided in other reaches of streams not surveyed. This map/database groups data at the scale of entire streams, and
differences in coho presence/absence between different reaches in the same stream are not shown.
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