Nez Perce Tribe

Department of Fisheries Resources Management


Monitoring of Oncorhynchus mykiss in the Lower Clearwater Basin

  • Probabilistic electrofishing and habitat surveys conducted throughout steelhead spawning and rearing streams within 1200 mi2 lower Clearwater River study area.
  • Study universe comprised of all perennial spawning and rearing streams utilized by the Clearwater River Lower Mainstem (CRLMA) sub-population of the Snake River Basin Steelhead Distinct Population Segment (DPS), excluding streams of the recently surveyed Potlatch River, Lapwai Creek and Big Canyon Creek watersheds.
  • CRLMA sub-population spawning and rearing range identified as accessible tributaries throughout the length of the mainstem Clearwater River (excluding those of Lolo Creek watershed), accessible South Fork Clearwater River tributaries up to Butcher Creek, and one tributary (Maggie Creek) to Middle Fork Clearwater River.
  • Columbia Basin Generalized Random-Tessellation Stratified (GRTS) Master Sample utilized to probabilistically locate 150+ meter status and trend sites.
  • Closed-population (upper and lower block net) single-pass electrofishing surveys conducted once throughout 153 status sites.
  • Closed-population, mark-recapture electrofishing surveys with 24 hour recovery conducted annually throughout 11 trend sites from 2008 to 2012; double block nets employed to monitor escapement.
  • All fish species anesthetized, identified, weighed, measured and released.
  • Scale and DNA samples collected from salmonid subsamples.
  • Habitat surveys conducted through all sites. Hybridized from EPA EMAP and USFS PIBO protocols, surveys utilized evenly spaced transects in conjunction with continuous hierarchical channel unit classification (Hawkins et al. (1993)).
  • Undercut bank, dominant substrate and LWD data collected at channel unit scale.
  • Pebble count, canopy cover and bankfull width collected at 11 evenly spaced transects.
  • Conductivity, pH, turbidity, temperature (air and water) and surface gradient recorded at site scale.
  • Data to address significant void in study area habitat status and species distribution.

Project Staff

clintc@nezperce.orgClint ChandlerProject Leader06(208) 621-3550

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