Divisions 3KLMNO Based on Extended Survivors Analysis with Short and Medium-term Projections of Future Stock Development by

Extended Survivors Analysis was applied to the commercial catch-at-age data for Greenland Halibut in NAFO Subarea 2 and Div. 3KLMNO from 1975-2002 to assess the current status of the stock. The analysis was calibrated using Canadian and European Union research vessel survey data. The XSA model formu...

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Bibliographic Details
Main Authors: Chris Darby W. R. Bowering, Jean-claude Mahé
Other Authors: The Pennsylvania State University CiteSeerX Archives
Format: Text
Language:English
Published: 2003
Subjects:
Greenland
Online Access:http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.512.536
http://archive.nafo.int/open/sc/2003/scr03-064.pdf
Description
Summary:Extended Survivors Analysis was applied to the commercial catch-at-age data for Greenland Halibut in NAFO Subarea 2 and Div. 3KLMNO from 1975-2002 to assess the current status of the stock. The analysis was calibrated using Canadian and European Union research vessel survey data. The XSA model formulation was optimized in order to remove a retrospective bias in the estimated parameters. The exploitable stock biomass is estimated to be decreasing to the lowest level in the recorded time series, fishing mortality is increasing and is double the level of F0.1. The trends in stock biomass and level of exploitation are consistent with all additional sources of information from the commercial fishery and surveys.

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