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KRIS Humboldt Bay: Chart Page

Area Freshwater Creek-Ryan Slough
Topic Fish: Downstream Migrants Graham Gulch 1997
Caption:  The Humboldt Fish Action Council operated downstream migrant traps in several Freshwater Creek tributaries in 1996. The Chart above shows trap results from Graham Gulch. While the fish community structure is dominated by salmonids, young of the year (0+) and yearling (1+) steelhead are predominant. The difference in the sample from that collected in Cloney Gulch suggests that conditions favor steelhead over coho salmon. There is a large rotational landslide in upper Graham Gulch which has contributed major amounts of sediment to the stream. High sediment transport can cause a loss of pool habitat, which is essential for juvenile coho, and decrease spawning gravel quality. Road densities are very high in Graham Gulch which may exacerbate sediment problems. Click on Info Links to learn more about downstream migrant trapping.

To learn more about this topic click Info Links .
To view additional information (data source, aquisition date etc.) about this page, click Metadata .
To view the table with the chart's data, click Chart Table web page.
To download the table with the chart's data, click trap97x.dbf (size 770 bytes)
To download the table with the chart's data as an Excel spreadsheet, click trap97x.dbf.xls (size 4,608 bytes) .