Feasibility of a bottom trawl survey for three slope groundfish species in Canadian waters / Paul J. Starr and Carl Schwarz. : Fs70-1/2000-156E-PDF
The feasibility for conducting research surveys using commercial bottom trawl gear targeted at three slope groundfish species located in the Pacific coast of Canada is presented. The objectives of such a survey are to generate comparable indices of population size over time which can be used as inputs into population assessment models for each of the three species. This feasibility analysis is based on the calculation of the variability in catch per hour for each species from commercial catch and effort data to determine the amount of stratification by depth and the number of tows required in each stratum to achieve a target level of precision. Of the three target species, longspine thornyheads appeared to be the least variable in commercial CPUEs and hence required the fewest tows to monitor the population. Shortspine thornyheads were of intermediate variability and Pacific Ocean perch were highly variable. Pacific ocean perch have a completely separate spatial distribution from the two thornyhead species and can be monitored independently of the other two species.
Lien permanent pour cette publication :
publications.gc.ca/pub?id=9.806296&sl=1
| Ministère/Organisme | Canada. Department of Fisheries and Oceans. Canada. Canadian Stock Assessment Secretariat. |
|---|---|
| Titre | Feasibility of a bottom trawl survey for three slope groundfish species in Canadian waters / Paul J. Starr and Carl Schwarz. |
| Titre de la série | Canadian Stock Assessment Secretariat research document, 1480-4883 ; 2000/156 |
| Type de publication | Série - Voir l'enregistrement principal |
| Langue | [Anglais] |
| Format | Électronique |
| Document électronique | |
| Note(s) | Includes bibliographic references (p. 34). |
| Information sur la publication | Ottawa : Fisheries and Oceans Canada, 2000. |
| Auteur / Contributeur | Starr, P. J. Schwarz, Carl James,1956- |
| Description | 42 p. : fig., graphs, maps, tables. |
| Numéro de catalogue |
|
| Descripteurs | Fisheries resources Salt water fish Fisheries management |
Demander des formats alternatifs
Pour demander une publication dans un format alternatif, remplissez le formulaire électronique des publications du gouvernement du Canada. Utilisez le champ du formulaire «question ou commentaire» pour spécifier la publication demandée.- Date de modification :