Dynamics of closed areas in Norway lobster fisheries
Dynamics of closed areas in Norway lobster fisheries
A dynamic, age-structured population model was developed to investigate the potential effects of introducing a closed area to a fishery for a species with limited adult mobility and planktonic dispersal of larvae, using biological and fishery information from a Norway lobster fishery in eastern Scotland. Simulated closure of part of the fishing grounds led to a long-term increase in total biomass and recruitment to the fished zone, but the larval subsidy did not compensate for the loss of fishing ground, and fishery yield was reduced under all modelled combinations of closed-area size and prior fishing effort. Concentration of effort in the fished zone and increased recruitment there led to reduced average size, and therefore value, of animals in the catch, as well as increased destruction of biomass by discarding undersized lobsters. Implementation of a closed area also led to oscillations in stock biomass, recruitment, and yield over several years after the closure, particularly with large closed areas and high fishing effort.
closed area, density-dependence, fisheries management, marine protected area, Nephrops norvegicus, simulation modelling, transient response
1600-1609
Smith, I. Philip
e04fd22f-641e-4ed5-ba96-da977aef781f
Jensen, Antony C.
ff1cabd2-e6fa-4e34-9a39-5097e2bc5f85
December 2008
Smith, I. Philip
e04fd22f-641e-4ed5-ba96-da977aef781f
Jensen, Antony C.
ff1cabd2-e6fa-4e34-9a39-5097e2bc5f85
Smith, I. Philip and Jensen, Antony C.
(2008)
Dynamics of closed areas in Norway lobster fisheries.
ICES Journal of Marine Science, 65 (9), .
(doi:10.1093/icesjms/fsn170).
Abstract
A dynamic, age-structured population model was developed to investigate the potential effects of introducing a closed area to a fishery for a species with limited adult mobility and planktonic dispersal of larvae, using biological and fishery information from a Norway lobster fishery in eastern Scotland. Simulated closure of part of the fishing grounds led to a long-term increase in total biomass and recruitment to the fished zone, but the larval subsidy did not compensate for the loss of fishing ground, and fishery yield was reduced under all modelled combinations of closed-area size and prior fishing effort. Concentration of effort in the fished zone and increased recruitment there led to reduced average size, and therefore value, of animals in the catch, as well as increased destruction of biomass by discarding undersized lobsters. Implementation of a closed area also led to oscillations in stock biomass, recruitment, and yield over several years after the closure, particularly with large closed areas and high fishing effort.
This record has no associated files available for download.
More information
Published date: December 2008
Keywords:
closed area, density-dependence, fisheries management, marine protected area, Nephrops norvegicus, simulation modelling, transient response
Identifiers
Local EPrints ID: 64574
URI: http://eprints.soton.ac.uk/id/eprint/64574
ISSN: 1054-3139
PURE UUID: 30c22243-78dd-4f2a-9cc7-66796131a126
Catalogue record
Date deposited: 22 Dec 2008
Last modified: 16 Mar 2024 02:34
Export record
Altmetrics
Contributors
Author:
I. Philip Smith
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics
