Juvenile Atlantic salmon (Salmo salar L.) abundance in the Experimental Ponds Area relative to adult returns to the Gander River as an index of marine survival : evidence for increased marine mortality... : Fs70-1/1998-126E-PDF
A marine survival ratio index was calculated as the number of adult salmon returning to the Gander River divided by the total juvenile salmon populations in the Experimental Ponds Area at the headwaters of the river in the previous spring. This survival index increased more than four-fold in the first four years (1992-1995) following closure of the fishery in 1992. The index dropped moderately in 1996 and then precipitously to pre-closure levels in 1997, suggesting that there has been a sudden decrease in marine survival despite the continued closure of the commercial fishery in insular Newfoundland. It is thus unlikely that the Gander River conservation requirement of 21,828 spawners will be met in 1998.
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| Ministère/Organisme | Canada. Department of Fisheries and Oceans. Canada. Canadian Stock Assessment Secretariat. |
|---|---|
| Titre | Juvenile Atlantic salmon (Salmo salar L.) abundance in the Experimental Ponds Area relative to adult returns to the Gander River as an index of marine survival : evidence for increased marine mortality in 1997 / R. Knoechel, P.M. Ryan and M.F. O'Connell. |
| Titre de la série | Canadian Stock Assessment Secretariat research document, 1480-4883 ; 98/126 |
| Type de publication | Série - Voir l'enregistrement principal |
| Langue | [Anglais] |
| Format | Électronique |
| Document électronique | |
| Note(s) | Includes bibliographical references (p. 5). |
| Information sur la publication | Ottawa : Fisheries and Oceans Canada, 1998. |
| Auteur / Contributeur | Knoechel, R. Ryan, P. M.(Patrick Michael) O'Connell, M. F. |
| Description | 10 p. : fig., graphs, maps, tables. |
| Numéro de catalogue |
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| Descripteurs | Fisheries resources Salt water fish Fishing area Fisheries management |