| 000 | 00000nam 2200000zi 4500 |
| 001 | 9.950448 |
| 003 | CaOODSP |
| 005 | 20250528082309 |
| 006 | m o d f |
| 007 | cr mn||||||||| |
| 008 | 250425e198208##bccab ob f000 0 eng d |
| 040 | |aCaOODSP|beng|erda|cCaOODSP |
| 041 | 0 |aeng|beng|bfre |
| 043 | |an-cn-bc|apn----- |
| 045 | |ax7x8 |
| 086 | 1 |aFs97-4/1670E-PDF|zFs97-4/1670 |
| 100 | 1 |aWestrheim, S. J., |eauthor. |
| 245 | 10|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 |
| 490 | 1 |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). |
| 520 | 3 |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. |
| 710 | 1 |aCanada. |bDepartment of Fisheries and Oceans, |eissuing body. |
| 710 | 2 |aPacific Biological Station (1972- ), |eissuing body. |
| 830 | #0|aCanadian manuscript report of fisheries and aquatic sciences ;|vno. 1670.|w(CaOODSP)9.505211 |
| 856 | 40|qPDF|s959 KB|uhttps://publications.gc.ca/collections/collection_2025/mpo-dfo/fs97-4/Fs97-4-1670-eng.pdf |