ON THE RATIONAL UTILIZATION OF THE ICELANDIC COD STOCK

Citation
Fm. Baldursson et al., ON THE RATIONAL UTILIZATION OF THE ICELANDIC COD STOCK, ICES journal of marine science, 53(4), 1996, pp. 643-658
Citations number
30
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Fisheries,"Marine & Freshwater Biology",Oceanografhy
ISSN journal
1054-3139
Volume
53
Issue
4
Year of publication
1996
Pages
643 - 658
Database
ISI
SICI code
1054-3139(1996)53:4<643:OTRUOT>2.0.ZU;2-Q
Abstract
The Icelandic cod stock is analysed with respect to the probable effec ts of different harvesting strategies on yield, spawning stock biomass , and economic benefits. Simulations are used to investigate the proba bility of stock recovery and collapse. Potential yield and economic be nefits/costs are also investigated, using stochastic and deterministic models. In stochastic simulations, attention is paid to the apparent stock-recruitment relationship, the highly variable weight-at-age and maturity-al-age in Icelandic waters along with the inevitable inaccura cies in Current and future assessments. Regardless of method, substant ial reduction in catches from recent (1993) levels is seen to be neces sary in order to rebuild the stock. In the deterministic model, profit maximization mandates closure of the fishery until the stock is rehab ilitated. Using the stochastic model, it is predicted that recent catc h levels lead to eventual extinction of the stock with high probabilit y. A management procedure is formulated and its application to the mod el is shown to lead to stabilization of the stock around an economical ly and biologically acceptable level. (C) 1996 International Council f or the Exploration of the Sea