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.

Permanent link to this Catalogue record:
publications.gc.ca/pub?id=9.804948&sl=0

Publication information
Department/Agency Canada. Department of Fisheries and Oceans.
Canada. Canadian Stock Assessment Secretariat.
Title 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.
Series title Canadian Stock Assessment Secretariat research document, 1480-4883 ; 99/43
Publication type Series - View Master Record
Language [English]
Format Electronic
Electronic document
Note(s) Includes bibliographical references (p. 6-7).
Publishing information Ottawa : Fisheries and Oceans Canada, 1999.
Author / Contributor Lawson, G. L.
Rose, George A., 1948-
Description 13 p. : graphs, maps, tables.
Catalogue number
  • Fs70-1/1999-43E-PDF
Subject terms Fisheries resources
Salt water fish
Fishing area
Fisheries management
Request alternate formats
To request an alternate format of a publication, complete the Government of Canada Publications email form. Use the form’s “question or comment” field to specify the requested publication.
Date modified: