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2003 GR Report Summary
ADULT AND JUVENILE STEELHEAD POPULATION SURVEYS,
GUALALA RIVER, CALIFORNIA, 2003
Richard W. DeHaven
December 31, 2003
(Edited and Repaginated 01/2006)
SUMMARY: Steelhead spawning surveys (counts of adults and redds) initiated in 2001 were continued in 2003, focusing on an 18.3-mile reach of the Wheatfield Fork, from House Creek downstream to the South Fork. This navigable reach, which has been selected as a long-term population indexing reach, was surveyed four times (73.2 miles total) from small, river-dory-style boats during February and early March 2003. Additional surveys could not be conducted due to the failure of optimal survey conditions to coincide with the principal investigator’s dates of availability. A total of 211 live adult steelhead and 9 steelhead redds were recorded. Due to the relative dearth of information, little could be concluded about total spawning escapement for the 2003 season. However, the 2003 survey results will be coalesced with the long-term study results for later analysis. The four index-reach surveys are described in individual survey reports which are appended.
Senior Fish and Wildlife Biologist (Retired); U.S. Fish and Wildlife Service (Service), Sacramento, California. Recommended Report (available on CD from the author) Citation: DeHaven, R. W. 2003. Adult and juvenile steelhead population surveys, Gualala River, California, 2003. Prepared by the author (drdehave et hotmail.com), December 31, 2003, for use by agencies, groups and individuals involved in steelhead recovery efforts. 14 pp. (After March 1, 2007, report may be requested on CD at the author's website at: http://www.gualalariversteelhead.info.) Disclaimer: These surveys and this report were self-funded and conducted during non-work hours, and not while in any official capacity as a biologist for the U. S. Fish and Wildlife Service.
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