期刊
ECOLOGICAL ECONOMICS
卷 97, 期 -, 页码 101-109出版社
ELSEVIER
DOI: 10.1016/j.ecolecon.2013.11.006
关键词
Stochastic population dynamics; Compensation; Depensation; Northern cod collapse; Splines; Demographic uncertainty
资金
- Spanish Ministry of Education [ECO2012-39098-C06-00]
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. (C) 2013 Elsevier B.V. All rights reserved.
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