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Maroto Fernández, José María and Morán Cabré, Manuel (2013) Modeling the stochastic dynamics of the aggregate stock in collapsed fisheries: The case of the Northern cod stock. [ ] (Unpublished)
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Official URL: http://eprints.ucm.es/23024/
Abstract
Motivated by the evidence that many collapsed stocks have failed to recover despite the fact that fishing mortality has been reduced, or even when a moratorium is in effect, we develop a methodological approach using splines to analyze the stochastic population dynamics of fish stocks at low stock levels. Considering the aggregate Northern cod stock by way of illustration, we find that the species’ lack of recovery, despite the moratorium which still remains in force, is consistent with the hypothesis of depensatory population dynamics at low population sizes, as opposed to the compensation estimated by the conventional regression methods used in classic bioeconomic models.
Item Type: | Working Paper or Technical Report |
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Additional Information: | We are grateful to Noel Roy, Peter Shelton, and Carl Walters for their comments. We also |
Uncontrolled Keywords: | Stochastic population dynamics; Compensation; Depensation; Northern cod collapse; Splines; Demographic uncertainty. |
Subjects: | Medical sciences > Biology > Biomathematics Sciences > Mathematics > Applied statistics Sciences > Mathematics > Mathematical statistics Medical sciences > Biology > Fishes Medical sciences > Biology > Marine biology |
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ID Code: | 23024 |
Deposited On: | 15 Oct 2013 14:10 |
Last Modified: | 19 Dec 2018 10:04 |
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