Nash equilibrium can resolve conflicting maximum sustainable yields in multi-species fisheries management
The current fisheries management goals set by the European Commission states that fish stocks should be harvested to deliver maximum sustainable yields (MSY) and simultaneously, management should take ecosystem considerations into account. This creates unsolved trade-offs for the management of the s...
Published in: | ICES Journal of Marine Science |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Högskolan i Skövde, Institutionen för biovetenskap
2017
|
Subjects: | |
Online Access: | http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-12862 https://doi.org/10.1093/icesjms/fsw148 |
id |
ftskoevdehoeg:oai:DiVA.org:his-12862 |
---|---|
record_format |
openpolar |
spelling |
ftskoevdehoeg:oai:DiVA.org:his-12862 2023-05-15T16:19:22+02:00 Nash equilibrium can resolve conflicting maximum sustainable yields in multi-species fisheries management Norrström, Niclas Casini, Michele Holmgren, Noél M. A. 2017 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-12862 https://doi.org/10.1093/icesjms/fsw148 eng eng Högskolan i Skövde, Institutionen för biovetenskap Högskolan i Skövde, Forskningscentrum för Systembiologi Swedish University of Agricultural Sciences, Department of Aquatic Resources, Institute of Marine Research, Lysekil, Sweden Oxford University Press ICES Journal of Marine Science, 1054-3139, 2017, 74:1, s. 78-90 http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-12862 doi:10.1093/icesjms/fsw148 ISI:000397136400008 Scopus 2-s2.0-85020882554 info:eu-repo/semantics/openAccess Baltic Sea multi-species reference points Ecology Ekologi Article in journal info:eu-repo/semantics/article text 2017 ftskoevdehoeg https://doi.org/10.1093/icesjms/fsw148 2022-10-25T20:52:17Z The current fisheries management goals set by the European Commission states that fish stocks should be harvested to deliver maximum sustainable yields (MSY) and simultaneously, management should take ecosystem considerations into account. This creates unsolved trade-offs for the management of the stocks. We suggest a definition of a multi-species-MSY (MS-MSY) where no alternative fishing mortality (F) can increase yield (long term) for any ecologically interacting stock, given that the other stocks are fished at constant efforts (Fs). Such a MS-MSY can be solved through the game theoretic concept of a Nash equilibrium and here we explore two solutions to this conflict in the Baltic Sea. We maximize the sustainable yield of each stock under two constraints: first, we harvest the other stocks at a fixed F (FNE); second, we keep the spawning stock biomasses of the other stocks fixed [biomass Nash equilibrium (BNE)]. As a case study, we have developed a multi-species interaction stochastic operative model (MSI-SOM), which contains a SOM for each of the three dominant species of the Baltic Sea, the predator cod (Gadus morhua), and its prey herring (Clupea harengus), and sprat (Sprattus sprattus). For our Baltic Sea case, MS-MSYs exist under both the FNE and the BNE, but there is no guarantee that point solutions exists. We found that the prey species’ spawning stock biomasses are additive in the cod growth function, which allowed for a point solution in BNE. In the FNE, the herring MSY was found to be relatively insensitive to the other species’ fishing mortalities (F), which facilitated a point solution. The MSY targets of the BNE and the FNE differ slightly where the BNE gives higher predator yields and lower prey yields. CC BY 4.0 Article in Journal/Newspaper Gadus morhua University of Skövde: Publications (DiVA) Nash ENVELOPE(-62.350,-62.350,-74.233,-74.233) ICES Journal of Marine Science 74 1 78 90 |
institution |
Open Polar |
collection |
University of Skövde: Publications (DiVA) |
op_collection_id |
ftskoevdehoeg |
language |
English |
topic |
Baltic Sea multi-species reference points Ecology Ekologi |
spellingShingle |
Baltic Sea multi-species reference points Ecology Ekologi Norrström, Niclas Casini, Michele Holmgren, Noél M. A. Nash equilibrium can resolve conflicting maximum sustainable yields in multi-species fisheries management |
topic_facet |
Baltic Sea multi-species reference points Ecology Ekologi |
description |
The current fisheries management goals set by the European Commission states that fish stocks should be harvested to deliver maximum sustainable yields (MSY) and simultaneously, management should take ecosystem considerations into account. This creates unsolved trade-offs for the management of the stocks. We suggest a definition of a multi-species-MSY (MS-MSY) where no alternative fishing mortality (F) can increase yield (long term) for any ecologically interacting stock, given that the other stocks are fished at constant efforts (Fs). Such a MS-MSY can be solved through the game theoretic concept of a Nash equilibrium and here we explore two solutions to this conflict in the Baltic Sea. We maximize the sustainable yield of each stock under two constraints: first, we harvest the other stocks at a fixed F (FNE); second, we keep the spawning stock biomasses of the other stocks fixed [biomass Nash equilibrium (BNE)]. As a case study, we have developed a multi-species interaction stochastic operative model (MSI-SOM), which contains a SOM for each of the three dominant species of the Baltic Sea, the predator cod (Gadus morhua), and its prey herring (Clupea harengus), and sprat (Sprattus sprattus). For our Baltic Sea case, MS-MSYs exist under both the FNE and the BNE, but there is no guarantee that point solutions exists. We found that the prey species’ spawning stock biomasses are additive in the cod growth function, which allowed for a point solution in BNE. In the FNE, the herring MSY was found to be relatively insensitive to the other species’ fishing mortalities (F), which facilitated a point solution. The MSY targets of the BNE and the FNE differ slightly where the BNE gives higher predator yields and lower prey yields. CC BY 4.0 |
format |
Article in Journal/Newspaper |
author |
Norrström, Niclas Casini, Michele Holmgren, Noél M. A. |
author_facet |
Norrström, Niclas Casini, Michele Holmgren, Noél M. A. |
author_sort |
Norrström, Niclas |
title |
Nash equilibrium can resolve conflicting maximum sustainable yields in multi-species fisheries management |
title_short |
Nash equilibrium can resolve conflicting maximum sustainable yields in multi-species fisheries management |
title_full |
Nash equilibrium can resolve conflicting maximum sustainable yields in multi-species fisheries management |
title_fullStr |
Nash equilibrium can resolve conflicting maximum sustainable yields in multi-species fisheries management |
title_full_unstemmed |
Nash equilibrium can resolve conflicting maximum sustainable yields in multi-species fisheries management |
title_sort |
nash equilibrium can resolve conflicting maximum sustainable yields in multi-species fisheries management |
publisher |
Högskolan i Skövde, Institutionen för biovetenskap |
publishDate |
2017 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-12862 https://doi.org/10.1093/icesjms/fsw148 |
long_lat |
ENVELOPE(-62.350,-62.350,-74.233,-74.233) |
geographic |
Nash |
geographic_facet |
Nash |
genre |
Gadus morhua |
genre_facet |
Gadus morhua |
op_relation |
ICES Journal of Marine Science, 1054-3139, 2017, 74:1, s. 78-90 http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-12862 doi:10.1093/icesjms/fsw148 ISI:000397136400008 Scopus 2-s2.0-85020882554 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1093/icesjms/fsw148 |
container_title |
ICES Journal of Marine Science |
container_volume |
74 |
container_issue |
1 |
container_start_page |
78 |
op_container_end_page |
90 |
_version_ |
1766005758381522944 |