Advanced Search
MyIDEAS: Login to save this paper or follow this series

Optimal Age- and Gear-specific Harvesting Policies for North-East Arctic Cod

Contents:

Author Info

  • Diekert, Florian K.

    ()
    (Centre for Ecological and Evolutionary Synthesis)

  • Hjermann, Dag Ø.

    (Centre for Ecological and Evolutionary Synthesis)

  • Nævdal , Eric

    (Dept. of Economics, University of Oslo)

  • Stenseth , Nils Chr.

    (Centre for Ecological and Evolutionary Synthesis)

Abstract

We examine optimal harvest policies in a multi-cohort, multi-gear bioeconomic model of North-East Arctic cod (Gadus morhua) which includes cannibalism and contains broader ecosystem effects. By controlling the selectivity of the different Fishing equipment, we can partially target different age cohorts. We show that cur- rent gear selectivity implies that the wrong Fish are targeted. Optimization shifts the exploitation pattern towards older and heavier Fish. This increases the harvested biomass while reducing the number of Fish removed from the ocean. The result is a much more robust and abundant cod stock with an age/size distribution closer to the stocks natural state. We optimize the Net Present Value (NPV) generated by the Fishery by letting effort and selectivity be the control variables and and that NPV may be more than doubled, even when only gear selectivity or harvest effort is allowed to vary.

Download Info

If you experience problems downloading a file, check if you have the proper application to view it first. In case of further problems read the IDEAS help page. Note that these files are not on the IDEAS site. Please be patient as the files may be large.
File URL: https://www.sv.uio.no/econ/english/research/unpublished-works/working-papers/pdf-files/2008/Memo-16-2008.pdf
Download Restriction: no

Bibliographic Info

Paper provided by Oslo University, Department of Economics in its series Memorandum with number 16/2008.

as in new window
Length: 38 pages
Date of creation: 01 Jul 2008
Date of revision:
Handle: RePEc:hhs:osloec:2008_016

Contact details of provider:
Postal: Department of Economics, University of Oslo, P.O Box 1095 Blindern, N-0317 Oslo, Norway
Phone: 22 85 51 27
Fax: 22 85 50 35
Email:
Web page: http://www.oekonomi.uio.no/indexe.html
More information through EDIRC

Related research

Keywords: Bioeconomics; North-East Arctic cod: Age-structure; Gear selectivity; Optimal harvest policies;

Find related papers by JEL classification:

This paper has been announced in the following NEP Reports:

References

No references listed on IDEAS
You can help add them by filling out this form.

Citations

Lists

This item is not listed on Wikipedia, on a reading list or among the top items on IDEAS.

Statistics

Access and download statistics

Corrections

When requesting a correction, please mention this item's handle: RePEc:hhs:osloec:2008_016. See general information about how to correct material in RePEc.

For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (Rhiana Bergh-Seeley).

If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

If references are entirely missing, you can add them using this form.

If the full references list an item that is present in RePEc, but the system did not link to it, you can help with this form.

If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your profile, as there may be some citations waiting for confirmation.

Please note that corrections may take a couple of weeks to filter through the various RePEc services.