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This map shows a summary of the presence/absence of coho salmon young-of-the-year in streams in the Guerneville sub-basin for the years 1988-1999, displayed with
KRIS sub-basins and 1:100,000 scale streams. Coho salmon were found in only 2 of the 8 historical streams surveyed in the sub-basin during the years 2000-2002,
which was a substantial decline from the years 1988-1999. 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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