The fishery biology of the weathervane scallop [Pecten (Patinopecten) caurinus Gould, 1850] in Oregon coastal waters Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/gq67jv57k

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  • Samples of weathervane scallops taken on Oregon Department of Fish and Wildlife cruises off Oregon waters during 1981-1982 were analyzed for a comparative growth study. No evidence of internal growth marks were found in the shell structure when analyzed by the acetate peel technique. Internal growth lines formed in the ligament lateral layers were reliable for age determination purposes; each band was formed by 12 striae deposited at fortnightly intervals and spaced close together during periods of slow growth. The von Bertalanffy growth model fit the observed data in most cases. At any given age, scallops from Coos Bay were larger than those from off Tillamook Head, Cape Kiwanda, Yaquina Head and Heceta Head. Scallops from Yaquina Head grew slowest. Differences in growth were associated with food availability and temperature. The weathervane scallop fishery currently is a sporadic fishery following a successful beginning in 1981. Dropping CPUE and increased availability of shrimp in Oregon waters can partly explain the dramatic decline of the weathervane scallop fishery.
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  • File scanned at 300 ppi (Monochrome, 256 Grayscale, 24-bit Color) using Capture Perfect 3.0 on a Canon DR-9050C 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 2013-07-29T15:57:47Z (GMT) No. of bitstreams: 1 NunezJoseD1988.pdf: 2831803 bytes, checksum: a7bc97569d5493660f47d40a6884e598 (MD5)
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