Uncertain biomass shift and collapse: implications for harvest policy in the fishery.
A study was conducted to examine uncertain biomass shifts in renewable resources. A biomass shift takes place when a dominant renewable resource stock collapses and its ecosystem niche is filled by a replacement species that increase in abundance following the initial collapse. A bioeconomic model...
| Published in: | Land Economics Vol. 72; pp. 500 - 519 |
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| Main Authors: | , |
| Format: | Article |
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University of Wisconsin Press
November 1996
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| Subjects: | |
| Online Access: | View this record in EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ssf&AN=510526697&site=ehost-live header: @attributes: shortDbName: ssf uiTerm: 510526697 longDbName: Social Sciences Full Text (H.W. Wilson) uiTag: AN controlInfo: bkinfo: jinfo: jid: 00237639 LAE jtl: Land Economics issn: 00237639 maglogo: N pubinfo: dt: November 1996 vid: 72 pid: 249 pub: University of Wisconsin Press artinfo: ui: 510526697 10.2307/3146912 ppf: 500 ppct: 19 formats: fmt: @attributes: type: T tig: atl: Uncertain biomass shift and collapse: implications for harvest policy in the fishery. aug: au: Johnston, Robert J. Suitnen, Jon G. su: Fisheries & the environment Fishery management models Fishery management sug: subj: Fisheries & the environment Fishery management models Fishery management ab: A study was conducted to examine uncertain biomass shifts in renewable resources. A biomass shift takes place when a dominant renewable resource stock collapses and its ecosystem niche is filled by a replacement species that increase in abundance following the initial collapse. A bioeconomic model for a fishery facing random biomass shift is developed. Optimal policy for three causes of biomass shift—environmental perturbation, overfishing, and a combination of these two factors—is derived and compared to optimal policy when the risk of biomass shift is absent. For each of the three causes of biomass shift, the model allows for a valued and non-valued replacement species. It was found that where a biomass shift is due solely to an exogenous environmental perturbation, optimal exploitation is faster than where there is no chance of biomass shift. Where initial collapse is caused solely by overfishing, optimal exploitation is slower than in the no-collapse case. However, in the presence of a valued replacement species, optimal exploitation of the initial species increases. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: N holdings: @attributes: islocal: N |
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