Download or read book Smolt Condition and Timing of Arrival at Lower Granite Reservoir 1983 1984 Technical Report written by and published by . This book was released on 1985 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hatcheries released 9.3 million chinook salmon and 6.3 million steelhead smolts and presmolts upriver from Lower Granite Reservoir for migration In spring, 1984. We operated smolt monitoring traps at Whitebird from March 14 to May 12, Snake River from March 22 to May 15 and Clearwater from March 29 to May 13. Peak passage of yearling chinook salmon occurred the third week In April at both Whitebird and Snake River traps. Passage of steelhead was still increasing when high water stopped trapping in mid-May. Median migration rates for branded chinook salmon between release sites and Whitebird were 3, 17 and 15 miles/day for Rapid River, South Fork Salmon and Decker Flat smolts, respectively, an average of 11.6 miles/day. Average migration rate for these three groups between Whitebird and Snake River trap was 28 miles/day. Average migration rate between release sites and Snake River (the head of Lower Granite Reservoir) was 13.2 miles/day and from that point on through the reservoir to the dam, 1.9 miles/day. Salmon River discharge, when considered along with other environmental factors, had the greatest effect on migration rate of smolts branded both at hatcheries and at the Whitebird trap and migrating to the head of Lower Granite Reservoir. Migration rate for steelhead released from Dworshak Hatchery and recaptured at the Clearwater trap was 34 miles/day. Survival rates to the Snake River trap of branded chinook salmon smolts released at Hells Canyon Dam, Rapid River, South Fork Salmon and Decker Flat were 52%, 65%, 68% and 35%, respectively. Classical descaling, where at least 40% of the scales are missing from at least two of five areas on the side of a smolt, ranged from 0 to 5.3% at hatcheries for chinook salmon and was less than 1% for steelhead. Descaling rate often Increased about 1% at release sites. Classical descaling at Whitebird, Clearwater and Snake River traps averaged 4.5, 2.5 and 1.5% for chinook salmon, 2.1, 0.4 and 1.4% for wild steelhead and 8.7, 4.1 and 5.5% for hatchery steelhead, respectively. Scattered descaling, where at least 10% of scales are missing from at least one side of a fish, was always more extensive than was classical descaling, ranging from 2.5 times greater for Clearwater hatchery steelhead to 6.8 times greater for Clearwater wild steelhead. Mean total length of chinook salmon yearlings was the same at all the traps, i.e., 128 mm (117 mm fork length) + 1 mm. The largest chinook salmon smolts came from Dworshak National Fish Hatchery on the Clearwater River. Hatchery steelhead were smallest (2 = 203 mm) at the Clearwater trap and largest (2 = 239 mm) at the Whitebird trap. Wild steelhead were also smallest at Clearwater trap ({bar x} = 178 mm) and largest at Whitebird trap ({bar x} = 193 mm). Purse seining to evaluate rates of descaling before and after smolts passed Lower Granite Dam was largely ineffective since we were unable to catch sufficient numbers of smolts in the tailrace, and winds in the forebay area altered descaling rates in sampled smolts.
Download or read book Smolt Condition and Timing of Arrival at Lower Granite Reservoir written by Richard J. Scully and published by . This book was released on 1986 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1988 with total page 648 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Annual Index Keyword A L written by and published by . This book was released on 1986 with total page 1164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Annual Index written by and published by . This book was released on 1984 with total page 1528 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Managing the Columbia River written by National Research Council (U.S.). Committee on Water Resources Management, Instream Flows, and Salmon Survival in the Columbia River Basin and published by National Academy Press. This book was released on 2004 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: Book News, Inc., Portland, OR (booknews.com).
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1986-10 with total page 932 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Compilation Report on the Effects of Reservoir Releases on Downstream Ecosystems written by Edward Cheslak and published by . This book was released on 1990 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Idaho Librarian written by and published by . This book was released on 1985 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book To Provide for Additional Protection of Steelhead Trout as a Game Fish written by United States. Congress. Senate. Select Committee on Indian Affairs and published by . This book was released on 1985 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Programmatic EIS Impacts of Artificial Salmon and Steelhead Production Strategies in the Columbia River Basin WA ID WY OR MT NV UT written by and published by . This book was released on 1996 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Northwest Science written by and published by . This book was released on 1995 with total page 618 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book North American Journal of Fisheries Management written by and published by . This book was released on 1993 with total page 926 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Saving the Salmon written by Lisa Mighetto and published by . This book was released on 1994 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fish Passage Technologies written by and published by Office of Technology Assessment. This book was released on 1995 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Canadian Special Publication of Fisheries and Aquatic Sciences written by and published by . This book was released on 1989 with total page 648 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the International Large River Symposium LARS written by D. P. Dodge and published by Fisheries and Oceans, Communications Directorate. This book was released on 1989 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main objectives of LARS were 1) To produce reliable estimates of fish yield by: a) reviewing existing estimators of production and standing stocks in large rivers and b) summarizing current river inventory and assessment techniques for biotic and abiotic variables; 2) To publish the case studies and synthesis papers; 3) To identify areas requiring further study to improve river resource management; and 4) To improve communication and liaison between scientists in research and management, university and government.
