Testing spatial heterogeneity with stock assessment models
This paper describes a methodology that combines meta-population theory and stock assessment models to gain insights about spatial heterogeneity of the meta-population in an operational time frame. The methodology was tested with stochastic simulations for different degrees of connectivity between s...
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ftcsic:oai:digital.csic.es:10261/329398 2024-02-11T10:07:02+01:00 Testing spatial heterogeneity with stock assessment models Jardim, Ernesto Eero, Margit Silva, Alexandra Ulrich-Rescan, Clara Pawlowski, Lionel Holmes, Steven J. Ibaibarriaga, Leire De Oliveira, José A. Riveiro, Isabel Alzorriz, Nekane Citores, Leire Scott, Finlay Uriarte, Andrés Carrera, Pablo Duhamel, Erwan Mosqueira, Iago 2018 http://hdl.handle.net/10508/15424 http://hdl.handle.net/10261/329398 en eng Public Library of Science (PLoS) Centro Oceanográfico de Vigo e0190791 http://hdl.handle.net/10508/15424 http://hdl.handle.net/10261/329398 23597 open Pesquerías Centro Oceanográfico de Vigo research article 2018 ftcsic 2024-01-16T11:50:00Z This paper describes a methodology that combines meta-population theory and stock assessment models to gain insights about spatial heterogeneity of the meta-population in an operational time frame. The methodology was tested with stochastic simulations for different degrees of connectivity between sub-populations and applied to two case studies, North Sea cod (Gadus morua) and Northeast Atlantic sardine (Sardina pilchardus). Considering that the biological components of a population can be partitioned into discrete spatial units, we extended this idea into a property of additivity of sub-population abundances. If the additivity results hold true for putative sub-populations, then assessment results based on sub-populations will provide information to develop and monitor the implementation of finer scale/local management. The simulation study confirmed that when sub-populations are independent and not too heterogeneous with regards to productivity, the sum of stock assessment model estimates of sub-populations’ SSB is similar to the SSB estimates of the meta-population. It also showed that a strong diffusion process can be detected and that the stronger the connection between SSB and recruitment, the better the diffusion process will be detected. On the other hand it showed that weak to moderate diffusion processes are not easy to identify and large differences between sub-populations productivities may be confounded with weak diffusion processes. The application to North Sea cod and Atlantic sardine exemplified how much insight can be gained. In both cases the results obtained were sufficiently robust to support the regional analysis. Article in Journal/Newspaper Northeast Atlantic Digital.CSIC (Spanish National Research Council) |
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Open Polar |
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Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
topic |
Pesquerías Centro Oceanográfico de Vigo |
spellingShingle |
Pesquerías Centro Oceanográfico de Vigo Jardim, Ernesto Eero, Margit Silva, Alexandra Ulrich-Rescan, Clara Pawlowski, Lionel Holmes, Steven J. Ibaibarriaga, Leire De Oliveira, José A. Riveiro, Isabel Alzorriz, Nekane Citores, Leire Scott, Finlay Uriarte, Andrés Carrera, Pablo Duhamel, Erwan Mosqueira, Iago Testing spatial heterogeneity with stock assessment models |
topic_facet |
Pesquerías Centro Oceanográfico de Vigo |
description |
This paper describes a methodology that combines meta-population theory and stock assessment models to gain insights about spatial heterogeneity of the meta-population in an operational time frame. The methodology was tested with stochastic simulations for different degrees of connectivity between sub-populations and applied to two case studies, North Sea cod (Gadus morua) and Northeast Atlantic sardine (Sardina pilchardus). Considering that the biological components of a population can be partitioned into discrete spatial units, we extended this idea into a property of additivity of sub-population abundances. If the additivity results hold true for putative sub-populations, then assessment results based on sub-populations will provide information to develop and monitor the implementation of finer scale/local management. The simulation study confirmed that when sub-populations are independent and not too heterogeneous with regards to productivity, the sum of stock assessment model estimates of sub-populations’ SSB is similar to the SSB estimates of the meta-population. It also showed that a strong diffusion process can be detected and that the stronger the connection between SSB and recruitment, the better the diffusion process will be detected. On the other hand it showed that weak to moderate diffusion processes are not easy to identify and large differences between sub-populations productivities may be confounded with weak diffusion processes. The application to North Sea cod and Atlantic sardine exemplified how much insight can be gained. In both cases the results obtained were sufficiently robust to support the regional analysis. |
format |
Article in Journal/Newspaper |
author |
Jardim, Ernesto Eero, Margit Silva, Alexandra Ulrich-Rescan, Clara Pawlowski, Lionel Holmes, Steven J. Ibaibarriaga, Leire De Oliveira, José A. Riveiro, Isabel Alzorriz, Nekane Citores, Leire Scott, Finlay Uriarte, Andrés Carrera, Pablo Duhamel, Erwan Mosqueira, Iago |
author_facet |
Jardim, Ernesto Eero, Margit Silva, Alexandra Ulrich-Rescan, Clara Pawlowski, Lionel Holmes, Steven J. Ibaibarriaga, Leire De Oliveira, José A. Riveiro, Isabel Alzorriz, Nekane Citores, Leire Scott, Finlay Uriarte, Andrés Carrera, Pablo Duhamel, Erwan Mosqueira, Iago |
author_sort |
Jardim, Ernesto |
title |
Testing spatial heterogeneity with stock assessment models |
title_short |
Testing spatial heterogeneity with stock assessment models |
title_full |
Testing spatial heterogeneity with stock assessment models |
title_fullStr |
Testing spatial heterogeneity with stock assessment models |
title_full_unstemmed |
Testing spatial heterogeneity with stock assessment models |
title_sort |
testing spatial heterogeneity with stock assessment models |
publisher |
Public Library of Science (PLoS) |
publishDate |
2018 |
url |
http://hdl.handle.net/10508/15424 http://hdl.handle.net/10261/329398 |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_relation |
Centro Oceanográfico de Vigo e0190791 http://hdl.handle.net/10508/15424 http://hdl.handle.net/10261/329398 23597 |
op_rights |
open |
_version_ |
1790605153277050880 |