Sélection de la langue

Gouvernement du Canada / Government of Canada

Recherche

Progress report on validating age determination methods for Pacific cod (Gadus macrocephalus) / by S.J. Westrheim and W. Shaw. : Fs97-4/1670E-PDF

"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.

Lien permanent pour cette publication :
publications.gc.ca/pub?id=9.950448&sl=1

Renseignements sur la publication
Ministère/Organisme
  • Canada. Department of Fisheries and Oceans, issuing body.
  • Pacific Biological Station (1972- ), issuing body.
TitreProgress report on validating age determination methods for Pacific cod (Gadus macrocephalus) / by S.J. Westrheim and W. Shaw.
Titre de la série
  • Canadian manuscript report of fisheries and aquatic sciences, 0706-6473 ; no. 1670
Type de publicationMonographie - Voir l'enregistrement principal
Langue[Anglais]
FormatTexte numérique
Document électronique
Note(s)
  • Digitized edition from print [produced by Department of Fisheries and Oceans].
  • Includes bibliographical references (pages 10-11).
  • Includes abstracts in English and French.
Information sur la publication
  • Nanaimo, British Columbia : Department of Fisheries and Oceans, Resource Services Branch, Pacific Biological Station, August 1982.
  • ©1982
Auteur / Contributeur
  • Westrheim, S. J., author.
Description1 online resource (iii, 41 pages) : illustrations, map.
Numéro de catalogue
  • Fs97-4/1670E-PDF
Descripteurs
Demander des formats alternatifs
Pour demander une publication dans un format alternatif, remplissez le formulaire électronique des publications du gouvernement du Canada. Utilisez le champ du formulaire «question ou commentaire» pour spécifier la publication demandée.

Détails de la page

Signaler un problème ou une erreur sur cette page
Date de modification :