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An update of the status of the witch flounder resource in NAFO divisions 2J, 3K and 3L / by W.R. Bowering. : Fs70-8/87-33E-PDF

"Catches of witch flounder in Div. 2J, 3K and 3L peaked at about 24,000 t in 1973, declined almost steadily to 1980 at about 3500 t, and remained stable to 1985. The 1986 catch of 1300 t is the lowest reported catch in more than 20 years. A biomass estimate for 1986 for the three divisions combined as determined from fall surveys indicates a minimum trawlable biomass of 25,000 t which is low compared to recent years. Age compositions from both research and commercial samples indicate a stable age structure in recent years at low levels of fishing pressure and despite this the age span has not increased. Long-term estimates of mortality suggest that fishing mortality in the late 1970's was probably 2-3 times the F0.1 level of 0.30"--Abstract, page 2.

Lien permanent pour cette publication :
publications.gc.ca/pub?id=9.895586&sl=1

Renseignements sur la publication
Ministère/Organisme
  • Canadian Atlantic Fisheries Scientific Advisory Committee, issuing body.
  • Canada. Department of Fisheries and Oceans. Science, issuing body.
TitreAn update of the status of the witch flounder resource in NAFO divisions 2J, 3K and 3L / by W.R. Bowering.
Titre de la série
  • CAFSAC research document ; no. 87/33
Type de publicationMonographie - Voir l'enregistrement principal
Langue[Anglais]
FormatTexte numérique
Document électronique
Note(s)
  • Cover title.
  • "Not to be cited without permission of the authors."
  • Includes abstract and series statement in French.
Information sur la publication
  • [Dartmouth, N.S.] : Canadian Atlantic Fisheries Scientific Advisory Committee ; St. John's, Newfoundland : Department of Fisheries and Oceans, Science Branch, [1987?]
Auteur / Contributeur
  • Bowering, W. R. (William Raymond), 1950- author.
Description1 online resource (17 pages) : graphs.
Numéro de catalogue
  • Fs70-8/87-33E-PDF
Descripteurs
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