Changes in the timing and location of cod spawning in Placenta [sic] Bay (NAFO sub-division 3Ps), 1997-1998 / by G.L. Lawson and G.A. Rose. : Fs70-1/1999-43E-PDF

Changes in the timing and location of cod spawning in Placentia Bay between 1997 and 1998 is examined, through a combination of acoustic surveys and direct sampling of spawning aggregations. Three spawning grounds were located in spring of 1997, at Bar Haven, Perch Rock, and Oderin Bank. Spawner density at Bar Haven peaked at 0.008 fish per square metre in April of 1997, but in 1998 peaked at 0.002 fish per square metre in June, a delay of more than 80 days. The timing of peak spawning is not as easily ascertained from the data at Perch Rock and Oderin Bank. However, a delay in spawning at these sites is suggested. Furthermore, the densities of cod at the spawning grounds shifted dramatically from 1997 to 1998. Densities at Perch Rock decreased, and at Oderin Bank increased, by orders of magnitude. These results, together with related studies of larval abundance and juvenile settlement in Placentia Bay, suggest that later spawning has important consequences to successful cod recruitment within Placentia Bay.

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publications.gc.ca/pub?id=9.804948&sl=1

Renseignements sur la publication
Ministère/Organisme Canada. Department of Fisheries and Oceans.
Canada. Canadian Stock Assessment Secretariat.
Titre Changes in the timing and location of cod spawning in Placenta [sic] Bay (NAFO sub-division 3Ps), 1997-1998 / by G.L. Lawson and G.A. Rose.
Titre de la série Canadian Stock Assessment Secretariat research document, 1480-4883 ; 99/43
Type de publication Série - Voir l'enregistrement principal
Langue [Anglais]
Format Électronique
Document électronique
Note(s) Includes bibliographical references (p. 6-7).
Information sur la publication Ottawa : Fisheries and Oceans Canada, 1999.
Auteur / Contributeur Lawson, G. L.
Rose, George A., 1948-
Description 13 p. : graphs, maps, tables.
Numéro de catalogue
  • Fs70-1/1999-43E-PDF
Descripteurs Fisheries resources
Salt water fish
Fishing area
Fisheries management
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