Steelhead trout otoliths for age, race, and stock analysis Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/pv63g2849

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  • Growth characteristics of otoliths were used to determine age, and to separate known races and stocks of steelhead trout (Salmo gairdneri). Otoliths were the first calcified structures observed in X-ray photographs of steelhead embryos, and a continuous record of events through life was interpreted from these structures. A direct relationship was established between otolith length and fork length of the fish. Freshwater and saltwater annuli, and spawning checks on otoliths were used to describe 27 life history patterns. A significant difference in nucleus diameters of otoliths was used to separate summer and winter races. Significant differences in freshwater growth characteristics were used subjectively to separate wild from hatchery-reared stocks of steelhead. The use of otoliths represents a valid technique to supplement those now available for management of this species.
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  • PDF derivative scanned at 300 ppi (256 B&W), using Capture Perfect 3.0, on a Canon DR-9080C. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR.
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  • description.provenance : Approved for entry into archive by Linda Kathman(linda.kathman@oregonstate.edu) on 2008-10-29T12:56:09Z (GMT) No. of bitstreams: 1 McKern_John_L_1971.pdf: 710819 bytes, checksum: b5a7764f0b2cad17b2946aaebef68b28 (MD5)
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  • description.provenance : Approved for entry into archive by Linda Kathman(linda.kathman@oregonstate.edu) on 2008-10-29T12:57:46Z (GMT) No. of bitstreams: 1 McKern_John_L_1971.pdf: 710819 bytes, checksum: b5a7764f0b2cad17b2946aaebef68b28 (MD5)
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Last modified: 08/08/2017

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