Dynamic modelling of multispecies fisheries for consensus building and management
Summary Many factors influence the dynamics of fisheries and feedback mechanisms amongst these factors are poorly understood. The ecological systems are too large and complex to conduct controlled experiments and economic adjustments to changes in fish populations defy traditional equilibrium analys...
Published in: | Environmental Conservation |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Cambridge University Press (CUP)
1996
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1017/s0376892900039199 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0376892900039199 |
id |
crcambridgeupr:10.1017/s0376892900039199 |
---|---|
record_format |
openpolar |
spelling |
crcambridgeupr:10.1017/s0376892900039199 2024-03-03T08:42:32+00:00 Dynamic modelling of multispecies fisheries for consensus building and management Ruth, Matthias Lindholm, James 1996 http://dx.doi.org/10.1017/s0376892900039199 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0376892900039199 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Environmental Conservation volume 23, issue 4, page 332-342 ISSN 0376-8929 1469-4387 Health, Toxicology and Mutagenesis Management, Monitoring, Policy and Law Nature and Landscape Conservation Pollution Water Science and Technology journal-article 1996 crcambridgeupr https://doi.org/10.1017/s0376892900039199 2024-02-08T08:30:37Z Summary Many factors influence the dynamics of fisheries and feedback mechanisms amongst these factors are poorly understood. The ecological systems are too large and complex to conduct controlled experiments and economic adjustments to changes in fish populations defy traditional equilibrium analysis. New modelling approaches are required to identify the driving forces behind the dynamics of exploited fish populations, assess likely consequences of alternative management measures, and achieve consensus among stakeholders. We present an interdisciplinary modelling approach that can be used easily to assess dynamic consequences of alternative assumptions for certain key biological and economic parameters, and incorporates the input of various stakeholder groups in the fishery. Contributions of scientists, economists and managers to the model can be augmented with contributions from the fisherfolk. Our approach is illustrated by a dynamic computer model capturing the interactions of three demersal fish species on Georges Bank, namely Atlantic Cod ( Gadus morhua ), Haddock ( Melanogramus aeglefimts ) and Pollack ( Pollachius virens ), population sizes of which are assumed to be density-dependent for the purposes of the model and are significantly affected by management decisions. The model addresses how management measures for one species influence the population dynamics of other commercially exploited species. Various scenarios are run to explore the implications of viable management strategies under alternative assumptions on the driving forces behind complex ecological-economic processes. The analyses indicate that neither small reductions in effort nor mesh size increases are likely to prevent the further demise of the Georges Bank ground fisheries, and, in fact, stocks of the three targeted species may decline. Alternative management measures seem to be necessary to prevent collapse, and might include various strategies, such as effort controls and mesh size reductions, in conjunction with a dramatic change ... Article in Journal/Newspaper atlantic cod Gadus morhua Cambridge University Press Environmental Conservation 23 4 332 342 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Health, Toxicology and Mutagenesis Management, Monitoring, Policy and Law Nature and Landscape Conservation Pollution Water Science and Technology |
spellingShingle |
Health, Toxicology and Mutagenesis Management, Monitoring, Policy and Law Nature and Landscape Conservation Pollution Water Science and Technology Ruth, Matthias Lindholm, James Dynamic modelling of multispecies fisheries for consensus building and management |
topic_facet |
Health, Toxicology and Mutagenesis Management, Monitoring, Policy and Law Nature and Landscape Conservation Pollution Water Science and Technology |
description |
Summary Many factors influence the dynamics of fisheries and feedback mechanisms amongst these factors are poorly understood. The ecological systems are too large and complex to conduct controlled experiments and economic adjustments to changes in fish populations defy traditional equilibrium analysis. New modelling approaches are required to identify the driving forces behind the dynamics of exploited fish populations, assess likely consequences of alternative management measures, and achieve consensus among stakeholders. We present an interdisciplinary modelling approach that can be used easily to assess dynamic consequences of alternative assumptions for certain key biological and economic parameters, and incorporates the input of various stakeholder groups in the fishery. Contributions of scientists, economists and managers to the model can be augmented with contributions from the fisherfolk. Our approach is illustrated by a dynamic computer model capturing the interactions of three demersal fish species on Georges Bank, namely Atlantic Cod ( Gadus morhua ), Haddock ( Melanogramus aeglefimts ) and Pollack ( Pollachius virens ), population sizes of which are assumed to be density-dependent for the purposes of the model and are significantly affected by management decisions. The model addresses how management measures for one species influence the population dynamics of other commercially exploited species. Various scenarios are run to explore the implications of viable management strategies under alternative assumptions on the driving forces behind complex ecological-economic processes. The analyses indicate that neither small reductions in effort nor mesh size increases are likely to prevent the further demise of the Georges Bank ground fisheries, and, in fact, stocks of the three targeted species may decline. Alternative management measures seem to be necessary to prevent collapse, and might include various strategies, such as effort controls and mesh size reductions, in conjunction with a dramatic change ... |
format |
Article in Journal/Newspaper |
author |
Ruth, Matthias Lindholm, James |
author_facet |
Ruth, Matthias Lindholm, James |
author_sort |
Ruth, Matthias |
title |
Dynamic modelling of multispecies fisheries for consensus building and management |
title_short |
Dynamic modelling of multispecies fisheries for consensus building and management |
title_full |
Dynamic modelling of multispecies fisheries for consensus building and management |
title_fullStr |
Dynamic modelling of multispecies fisheries for consensus building and management |
title_full_unstemmed |
Dynamic modelling of multispecies fisheries for consensus building and management |
title_sort |
dynamic modelling of multispecies fisheries for consensus building and management |
publisher |
Cambridge University Press (CUP) |
publishDate |
1996 |
url |
http://dx.doi.org/10.1017/s0376892900039199 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0376892900039199 |
genre |
atlantic cod Gadus morhua |
genre_facet |
atlantic cod Gadus morhua |
op_source |
Environmental Conservation volume 23, issue 4, page 332-342 ISSN 0376-8929 1469-4387 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0376892900039199 |
container_title |
Environmental Conservation |
container_volume |
23 |
container_issue |
4 |
container_start_page |
332 |
op_container_end_page |
342 |
_version_ |
1792497926794117120 |