Technical Report

 

Nehalem River winter steelhead study Public Deposited

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https://ir.library.oregonstate.edu/concern/technical_reports/2v23vt868

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  • The Nehalem and North Fork Nehalem rivers are the major tributaries of Nehalem Bay, an estuary on Oregon's north coast (Fig 1). The winter steelhead (Salmo gairdneri) and related fisheries of both streams have been the object of a study which began in 1972. Some data from creel surveys were available for the 1970-71 and 1971-72 steelhead seasons and have been used where appropriate. The study was prompted by the apparent failure of hatchery-reared steelhead smolts to contribute in the Nehalem River sport catch at the rate similar to that observed on other coastal streams. There was also concern regarding the status of wild winter steelhead in the Nehalem River. We did not feel that there were any particular problems with the fishery on the North Fork, but included it in the study because the steelhead catch card analysis had historically combined the catches from the two streams. We felt it desirable to compare our catch estimates with those obtained from catch card analysis. As it turned out, the fishery on the North Fork served an informative role as a control study stream. Initial study objectives included the following: 1. Determine the total catch and angler effort. 2. Determine contribution of hatchery fish to catch and escapement. 3. Identify factors limiting contribution of hatchery fish. 4. Determine optimum time and release sites for hatchery smolts for the best return to the angler. 5. Determine the winter steelhead hatchery stock best suited for use in a fishery enhancement program. As the study developed, obtaining life-history data on wild steelhead in the Nehalem River also became an important objective.
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  • B&W + GrayscaleFile scanned at 300 ppi (Monochrome, 256 Grayscale) using Capture Perfect 3.0.82 on a Canon DR-9080C in PDF format. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR.
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  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2013-04-09T15:58:21Z (GMT) No. of bitstreams: 1 NehalemRiverWinterSteelhead.pdf: 38999955 bytes, checksum: 1e5040e0fa9e3883c727f20c73803973 (MD5)
  • description.provenance : Submitted by Susan Gilmont (susan.gilmont@orst.edu) on 2013-04-05T21:31:45Z No. of bitstreams: 1 NehalemRiverWinterSteelhead.pdf: 38999955 bytes, checksum: 1e5040e0fa9e3883c727f20c73803973 (MD5)
  • description.provenance : Made available in DSpace on 2013-04-09T15:58:21Z (GMT). No. of bitstreams: 1 NehalemRiverWinterSteelhead.pdf: 38999955 bytes, checksum: 1e5040e0fa9e3883c727f20c73803973 (MD5) Previous issue date: 1977
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