Cannibalism and the optimal sharing of the North-East Atlantic cod stock: A computation model
This paper shows how intra-stock relations, such as cannibalism and growth enhancement, define the optimal sharing of a fish resource between heterogeneous harve sting agents. The sharing of resources between different vessel groups is often left for political decision making. Nonetheless, such decI...
Main Authors: | , |
---|---|
Format: | Report |
Language: | English |
Published: |
Chr. Michelsen Institute
2008
|
Subjects: | |
Online Access: | http://hdl.handle.net/11250/2435762 |
id |
ftcmi:oai:open.cmi.no:11250/2435762 |
---|---|
record_format |
openpolar |
spelling |
ftcmi:oai:open.cmi.no:11250/2435762 2023-05-15T15:27:39+02:00 Cannibalism and the optimal sharing of the North-East Atlantic cod stock: A computation model Armstrong, C.W. Sumaila, U.R. 2008-02-29T13:45:45Z application/pdf http://hdl.handle.net/11250/2435762 eng eng Chr. Michelsen Institute CMI Working paper WP 1998: 4 urn:issn:0804-3639 http://hdl.handle.net/11250/2435762 Bioeconomics Cooperatives Fishery resources Cod Harvesting Norway Russia Working paper 2008 ftcmi 2021-10-19T09:16:35Z This paper shows how intra-stock relations, such as cannibalism and growth enhancement, define the optimal sharing of a fish resource between heterogeneous harve sting agents. The sharing of resources between different vessel groups is often left for political decision making. Nonetheless, such decIsions may have both biological and economic consequences. This becomes quite clear when different harvesting groups exploit different sections (age groups) of a stock that has intra-stock interactions in the form of cannibalism. A two-agent bioeconomic model with cannibalism is developed and used to determIne (i) optimal annual harvest sizes (T ACS) for cod, and (ii) the optimal proportion of the T AC that should be harvested by the trawler and coastal fleets. Applying biological and economIc data in a numerical procedure, and comparing the results obtained to previous studies, it is shown that the presence of cannibalism has a significant impact on who should take what proportion of the T AC, and hence, the standing stock size and discounted economIc rent achievable. In sharp contrast to other studies, we find that the optimal harvest requires that both trawlers and coastal vessels should harve st the fish resource. In addition, the results indicate that from a bioeconomic perspective, the existing trawler fleets harvest share in the cod fishery is too high. Report atlantic cod North East Atlantic CMI Open Research Archive (Chr. Michelsens Institutt) Norway |
institution |
Open Polar |
collection |
CMI Open Research Archive (Chr. Michelsens Institutt) |
op_collection_id |
ftcmi |
language |
English |
topic |
Bioeconomics Cooperatives Fishery resources Cod Harvesting Norway Russia |
spellingShingle |
Bioeconomics Cooperatives Fishery resources Cod Harvesting Norway Russia Armstrong, C.W. Sumaila, U.R. Cannibalism and the optimal sharing of the North-East Atlantic cod stock: A computation model |
topic_facet |
Bioeconomics Cooperatives Fishery resources Cod Harvesting Norway Russia |
description |
This paper shows how intra-stock relations, such as cannibalism and growth enhancement, define the optimal sharing of a fish resource between heterogeneous harve sting agents. The sharing of resources between different vessel groups is often left for political decision making. Nonetheless, such decIsions may have both biological and economic consequences. This becomes quite clear when different harvesting groups exploit different sections (age groups) of a stock that has intra-stock interactions in the form of cannibalism. A two-agent bioeconomic model with cannibalism is developed and used to determIne (i) optimal annual harvest sizes (T ACS) for cod, and (ii) the optimal proportion of the T AC that should be harvested by the trawler and coastal fleets. Applying biological and economIc data in a numerical procedure, and comparing the results obtained to previous studies, it is shown that the presence of cannibalism has a significant impact on who should take what proportion of the T AC, and hence, the standing stock size and discounted economIc rent achievable. In sharp contrast to other studies, we find that the optimal harvest requires that both trawlers and coastal vessels should harve st the fish resource. In addition, the results indicate that from a bioeconomic perspective, the existing trawler fleets harvest share in the cod fishery is too high. |
format |
Report |
author |
Armstrong, C.W. Sumaila, U.R. |
author_facet |
Armstrong, C.W. Sumaila, U.R. |
author_sort |
Armstrong, C.W. |
title |
Cannibalism and the optimal sharing of the North-East Atlantic cod stock: A computation model |
title_short |
Cannibalism and the optimal sharing of the North-East Atlantic cod stock: A computation model |
title_full |
Cannibalism and the optimal sharing of the North-East Atlantic cod stock: A computation model |
title_fullStr |
Cannibalism and the optimal sharing of the North-East Atlantic cod stock: A computation model |
title_full_unstemmed |
Cannibalism and the optimal sharing of the North-East Atlantic cod stock: A computation model |
title_sort |
cannibalism and the optimal sharing of the north-east atlantic cod stock: a computation model |
publisher |
Chr. Michelsen Institute |
publishDate |
2008 |
url |
http://hdl.handle.net/11250/2435762 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
atlantic cod North East Atlantic |
genre_facet |
atlantic cod North East Atlantic |
op_relation |
CMI Working paper WP 1998: 4 urn:issn:0804-3639 http://hdl.handle.net/11250/2435762 |
_version_ |
1766358065500651520 |