Download or read book Base Line Fisheries and Limnological Survey of Bead Lake, Pend Oreille County, WA written by Derek D. Rader and published by . This book was released on 2006 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The objectives of this study were to assess the current stock status of fishes in Bead Lake, Pend Oreille County, Washington and to identify factors that might limit fish production. Historical data (1978 to 2004) for ten water quality variables -- temperature, dissolved oxygen, phosphorous, nitrate, ammonia, turbidity, total suspended solids, fecal coliform, secchi disc transparency, chlorophyll a, and Carlson's trophic state index (TSI) -- were compiled and analyzed to determine trends over time. In 2004, primary productivity was assessed using the light/dark bottle method and secondary productivity by zooplankton and benthic macroinvertebrate sampling. An eight-month (April -- November) baseline fisheries survey was conducted using electrofishing, gillnetting, fyke netting, and minnow trapping techniques. Data were collected on fish species composition, catch-per-unit-effort (CPUE), age and growth, and feeding habits. The sport fishery was evaluated through monthly creel surveys (January 2004 - February 2005) to determine angler pressure, harvest and the economic value of the fishery"--Document.