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Herring stock estimates from spawn surveys for the north coast of British Columbia in 1986 / by C.W. Haegele and J.F. Schweigert. : Fs97-4/1976E-PDF

"From diving and surface surveys of spawn, 24,354 tonnes of herring were estimated to have spawned in the North Coast District of British Columbia in 1986. In Chatham Sound (Areas 3 and 4N) 16,835 tonnes spawned in three waves, with 97% spawning in the second wave. On north Porcher Island (Area 4S) 1939 tonnes spawned in a first wave in Hunt Inlet and 436 tonnes spawned in a second wave in Malacca Passage, for a total of 2375 tonnes. An estimated 4181 tonnes spawned on south Porcher Island (Area 5N) and 963 t in Area 5S. Estimated spawner biomass was three times greater in 1986 than in 1982, when the last diving survey was made. Spawn surveyed by divers was deposited over a narrow depth range on gradually sloped shorelines"--Abstract, page iii.

Lien permanent pour cette publication :
publications.gc.ca/pub?id=9.953391&sl=1

Renseignements sur la publication
Ministère/Organisme
  • Canada. Department of Fisheries and Oceans, issuing body.
  • Pacific Biological Station (1972- ), issuing body.
TitreHerring stock estimates from spawn surveys for the north coast of British Columbia in 1986 / by C.W. Haegele and J.F. Schweigert.
Titre de la série
  • Canadian manuscript report of fisheries and aquatic sciences, 0706-6473 ; no. 1976
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 (page 6).
  • Includes abstracts in English and French.
Information sur la publication
  • Nanaimo, British Columbia : Department of Fisheries and Oceans, Fisheries Research Branch, Pacific Biological Station, February 1988.
  • ©1988
Auteur / Contributeur
  • Haegele, C. W., author.
Description1 online resource (iii, 28 pages) : maps.
Numéro de catalogue
  • Fs97-4/1976E-PDF
Descripteurs
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