Offshore herring biology and 2001 recruitment forecast for the west coast Vancouver Island stock assessment region / R.W. Tanasichuk. : Fs70-1/2000-146E-PDF
An offshore trawl survey was done between July 25 and 30, 2000 to collect information on pelagic fish distribution and feeding, and to sample herring schools for a recruitment forecast for West Coast Vancouver Island (WCVI) herring in the 2001 fishing season. Herring dominated the pelagic biomass. Schools were numerous and distributed widely over the study area. Several sardine schools were observed. Pacific hake, traditionally the dominant pelagic fish was absent. Stomach content examination indicated that herring continued to feed exclusively on euphausiids and that the daily ration estimate was similar to that for other years, in other words, feeding conditions were typical. Data analysis for the traditional form of the recruitment forecast included three evaluations of potential bias. The forecasted biomass of recruits ranges between 700 and 1200 tonnes. This would be considered as poor based on the criteria used in the stock assessment process. A forecast based on risk analysis suggested that recruitment should be poor or average.
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| Ministère/Organisme | Canada. Department of Fisheries and Oceans. Canada. Canadian Stock Assessment Secretariat. |
|---|---|
| Titre | Offshore herring biology and 2001 recruitment forecast for the west coast Vancouver Island stock assessment region / R.W. Tanasichuk. |
| Titre de la série | Canadian Stock Assessment Secretariat research document, 1480-4883 ; 2000/146 |
| Type de publication | Série - Voir l'enregistrement principal |
| Langue | [Anglais] |
| Format | Électronique |
| Document électronique | |
| Note(s) | Includes bibliographic references (p. 8-9). |
| Information sur la publication | Ottawa : Fisheries and Oceans Canada, 2000. |
| Auteur / Contributeur | Tanasichuk, Ronald W. |
| Description | 29 p. : fig., graphs, maps, tables. |
| Numéro de catalogue |
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| Descripteurs | Fisheries resources Salt water fish Fishing area Fisheries management |
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