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040 |aCaOODSP|beng|erda|cCaOODSP
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043 |an-cn-bc|apn-----
045 |ax7x8
0861 |aFs97-4/1670E-PDF|zFs97-4/1670
1001 |aWestrheim, S. J., |eauthor.
24510|aProgress report on validating age determination methods for Pacific cod (Gadus macrocephalus) / |cby S.J. Westrheim and W. Shaw.
264 1|aNanaimo, British Columbia : |bDepartment of Fisheries and Oceans, Resource Services Branch, Pacific Biological Station, |cAugust 1982.
264 4|c©1982
300 |a1 online resource (iii, 41 pages) : |billustrations, map.
336 |atext|btxt|2rdacontent
337 |acomputer|bc|2rdamedia
338 |aonline resource|bcr|2rdacarrier
4901 |aCanadian manuscript report of fisheries and aquatic sciences, |y0706-6473 ; |vno. 1670
500 |aDigitized edition from print [produced by Department of Fisheries and Oceans].
504 |aIncludes bibliographical references (pages 10-11).
5203 |a"Past attempts at validating age determination of Pacific cod (Gadus macrocephalus) are reviewed. Results of an improved scale-reading technique and exploratory techniques with dorsal and pectoral fin rays are presented. Among-reader consistency for both scales and fin rays was poor over the age range, except for age 0. Accuracy of scale readings was 100% at age 1, 91% at age 2, and 88% at age 3, based on scales collected from 96 known-age cod. Further studies are recommended. Fin-ray ages were older than scale ages, for the same fish, and the deviations varied inversely with scale age"--Abstract, page iii.
546 |aIncludes abstracts in English and French.
650 0|aPacific cod|xAge determination|zBritish Columbia|zPacific Coast.
650 0|aPacific cod|zBritish Columbia|zPacific Coast|xGrowth.
650 6|aMorue du Pacifique|xÂge|xDétermination|zColombie-Britannique|zPacifique, Côte du.
650 6|aMorue du Pacifique|zColombie-Britannique|zPacifique, Côte du|xCroissance.
7101 |aCanada. |bDepartment of Fisheries and Oceans, |eissuing body.
7102 |aPacific Biological Station (1972- ), |eissuing body.
830#0|aCanadian manuscript report of fisheries and aquatic sciences ;|vno. 1670.|w(CaOODSP)9.505211
85640|qPDF|s959 KB|uhttps://publications.gc.ca/collections/collection_2025/mpo-dfo/fs97-4/Fs97-4-1670-eng.pdf