Detecting the presence of depensation in collapsed fisheries: The case of the Northern cod stock

Jose M. Maroto and Manuel Moran

Ecological Economics, 2014, vol. 97, issue C, 101-109

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.

Keywords: Stochastic population dynamics; Compensation; Depensation; Northern cod collapse; Splines; Demographic uncertainty (search for similar items in EconPapers)
Date: 2014
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Citations: View citations in EconPapers (2)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:ecolec:v:97:y:2014:i:c:p:101-109

DOI: 10.1016/j.ecolecon.2013.11.006

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