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Selectivity, pulse fishing and endogenous lifespan in Beverton-Holt models

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  • Da Rocha, José María
  • Antelo, Luis T.
  • Gutiérrez Huerta, María José

Abstract

Optimal management in a multi-cohort Beverton-Holt model with any number of age classes and imperfect selectivity is equivalent to finding the optimal fish lifespan by chosen fallow cycles. Optimal policy differs in two main ways from the optimal lifespan rule with perfect selectivity. First, weight gain is valued in terms of the whole population structure. Second, the cost of waiting is the interest rate adjusted for the increase in the pulse length. This point is especially relevant for assessing the role of selectivity. Imperfect selectivity reduces the optimal lifespan and the optimal pulse length. We illustrate our theoretical findings with a numerical example. Results obtained using global numerical methods select the optimal pulse length predicted by the optimal lifespan rule.

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Paper provided by University of the Basque Country - Department of Foundations of Economic Analysis II in its series DFAEII Working Papers with number 2012-11.

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Date of creation: 2012
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Handle: RePEc:ehu:dfaeii:8768

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Keywords: optimisation in age-structured models; pulse fishing;

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Cited by:
  1. Quaas, Martin F. & Requate, Till & Ruckes, Kirsten & Skonhoft, Anders & Vestergaard, Niels & Voss, Rudi, 2013. "Incentives for optimal management of age-structured fish populations," Resource and Energy Economics, Elsevier, vol. 35(2), pages 113-134.
  2. Da Rocha, José María & Gutiérrez Huerta, María José & Villasante, Sebastián, 2013. "Economic Effects of Global Warming under," DFAEII Working Papers DFAEII;2013-03, University of the Basque Country - Department of Foundations of Economic Analysis II.

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