Fish Research Project, Oregon : Evaluation of the Success of Supplementing Imnaha River Steelhead with Hatchery Reared Smolts: Phase One : Completion Report.

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Two streams in the Imnaha River subbasin (Camp Creek and Little Sheep Creek) and eight streams in the Grande Ronde River subbasin (Catherine, Deer, Five Points, Fly, Indian, Lookingglass, Meadow, and Sheep creeks) were selected as study streams to evaluate the success and impacts of steelhead supplementation in northeast Oregon. The habitat of the study streams was inventoried to compare streams and to evaluate whether habitat might influence the performance parameters we will measure in the study. The mean fecundity of hatchery and natural steelhead 1-salts returning to Little Sheep Creek fish facility in 1990 and 1991 ranged from 3,550 ... continued below

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167 pages

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Carmichael, Richard W.; Whitesel, Timothy A. & Jonasson, Brian C. August 1, 1995.

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Description

Two streams in the Imnaha River subbasin (Camp Creek and Little Sheep Creek) and eight streams in the Grande Ronde River subbasin (Catherine, Deer, Five Points, Fly, Indian, Lookingglass, Meadow, and Sheep creeks) were selected as study streams to evaluate the success and impacts of steelhead supplementation in northeast Oregon. The habitat of the study streams was inventoried to compare streams and to evaluate whether habitat might influence the performance parameters we will measure in the study. The mean fecundity of hatchery and natural steelhead 1-salts returning to Little Sheep Creek fish facility in 1990 and 1991 ranged from 3,550 to 4,663 eggs/female; the mean fecundity of hatchery and natural steelhead 2-salts ranged from 5,020 to 5,879 eggs/female. Variation in length explained 57% of the variation in fecundity of natural steelhead, but only 41% to 51% of the variation in fecundity of hatchery steelhead. Adult steelhead males had an average spermatocrit of 43.9% at spawning. We were also able to stain sperm cells so that viable cells could be distinguished from dead cells. Large, red disc tags may be the most useful for observing adults on the spawning grounds. The density of wild, juvenile steelhead ranged from 0 fish/l00{sup 2} to 35.1 (age-0) and 14.0 (age-1) fish/l00m{sup 2}. Evidence provided from the National Marine Fisheries Service suggests that hatchery and wild fish within a subbasin are genetically similar. The long-term experimental design is presented as a component of this report.

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167 pages

Notes

OSTI as DE95017186

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  • Other Information: PBD: Aug 1995

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  • Other: DE95017186
  • Report No.: DOE/BP-01016-1
  • Grant Number: BI79-89BP01016
  • DOI: 10.2172/103535 | External Link
  • Office of Scientific & Technical Information Report Number: 103535
  • Archival Resource Key: ark:/67531/metadc621521

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  • August 1, 1995

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  • June 16, 2015, 7:43 a.m.

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  • July 5, 2016, 2:14 p.m.

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Carmichael, Richard W.; Whitesel, Timothy A. & Jonasson, Brian C. Fish Research Project, Oregon : Evaluation of the Success of Supplementing Imnaha River Steelhead with Hatchery Reared Smolts: Phase One : Completion Report., report, August 1, 1995; United States. (digital.library.unt.edu/ark:/67531/metadc621521/: accessed April 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.