Assessing the patchiness of early life stage of a fish stock (Gadus morhua) and its contribution to the stock recruitment
Patchiness, defined as spatial heterogeneity in distribution of organisms, is a common phenomenon in zooplankton including ichtyoplankton. In heterogeneous landscapes, depending on the scale of prey and predatory distributions, individuals in patches may experience distinct differences in the surviv...
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ftdoajarticles:oai:doaj.org/article:ea03ead6006c4fdca53b584e112251bc 2023-05-15T15:12:38+02:00 Assessing the patchiness of early life stage of a fish stock (Gadus morhua) and its contribution to the stock recruitment Nicolas Dupont Frode B. Vikebø Øystein Langangen 2022-10-01T00:00:00Z https://doi.org/10.3389/fmars.2022.932169 https://doaj.org/article/ea03ead6006c4fdca53b584e112251bc EN eng Frontiers Media S.A. https://www.frontiersin.org/articles/10.3389/fmars.2022.932169/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2022.932169 https://doaj.org/article/ea03ead6006c4fdca53b584e112251bc Frontiers in Marine Science, Vol 9 (2022) patchiness small-scale spatial mortality stock recruitment early-life stages coupled biological-physical model connected labelling component Science Q General. Including nature conservation geographical distribution QH1-199.5 article 2022 ftdoajarticles https://doi.org/10.3389/fmars.2022.932169 2022-12-30T23:14:31Z Patchiness, defined as spatial heterogeneity in distribution of organisms, is a common phenomenon in zooplankton including ichtyoplankton. In heterogeneous landscapes, depending on the scale of prey and predatory distributions, individuals in patches may experience distinct differences in the survival rate compared to individuals distributed more homogeneously outside patches. In this study, we focused on drifting eggs and larvae of Northeast Arctic (NEA) cod, one of the largest exploited fish stock in the world. The eggs and larvae are largely distributed along the north-western coast of Norway and northern Russia. We ask to what degree individuals are located in patches contribute to the species recruitment. For this purpose, we developed a patch recognition method to detect the existence of patches in particle tracking simulations using a connected-component labeling algorithm. We then assessed the contribution of individuals in detected patches to the total recruitment. Our results showed that depending on year, day of year, and resolution scale for detection of patches, recruits present in patches can vary between 0.6% and 38.7% with an average of 20.4% of total recruitment. The percentage decreased with increasing day of year in the drifting season but increased with decreasing patch resolution scale, down to the finest investigated scale of 8 km. On the basis of these results, we advise field recruitment studies of NEA cod to at least resolve an 8-km spatial scale to capture effects of spatial heterogeneity in the survival rate on the species recruitment. Article in Journal/Newspaper Arctic Gadus morhua Zooplankton Directory of Open Access Journals: DOAJ Articles Arctic Norway Frontiers in Marine Science 9 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
patchiness small-scale spatial mortality stock recruitment early-life stages coupled biological-physical model connected labelling component Science Q General. Including nature conservation geographical distribution QH1-199.5 |
spellingShingle |
patchiness small-scale spatial mortality stock recruitment early-life stages coupled biological-physical model connected labelling component Science Q General. Including nature conservation geographical distribution QH1-199.5 Nicolas Dupont Frode B. Vikebø Øystein Langangen Assessing the patchiness of early life stage of a fish stock (Gadus morhua) and its contribution to the stock recruitment |
topic_facet |
patchiness small-scale spatial mortality stock recruitment early-life stages coupled biological-physical model connected labelling component Science Q General. Including nature conservation geographical distribution QH1-199.5 |
description |
Patchiness, defined as spatial heterogeneity in distribution of organisms, is a common phenomenon in zooplankton including ichtyoplankton. In heterogeneous landscapes, depending on the scale of prey and predatory distributions, individuals in patches may experience distinct differences in the survival rate compared to individuals distributed more homogeneously outside patches. In this study, we focused on drifting eggs and larvae of Northeast Arctic (NEA) cod, one of the largest exploited fish stock in the world. The eggs and larvae are largely distributed along the north-western coast of Norway and northern Russia. We ask to what degree individuals are located in patches contribute to the species recruitment. For this purpose, we developed a patch recognition method to detect the existence of patches in particle tracking simulations using a connected-component labeling algorithm. We then assessed the contribution of individuals in detected patches to the total recruitment. Our results showed that depending on year, day of year, and resolution scale for detection of patches, recruits present in patches can vary between 0.6% and 38.7% with an average of 20.4% of total recruitment. The percentage decreased with increasing day of year in the drifting season but increased with decreasing patch resolution scale, down to the finest investigated scale of 8 km. On the basis of these results, we advise field recruitment studies of NEA cod to at least resolve an 8-km spatial scale to capture effects of spatial heterogeneity in the survival rate on the species recruitment. |
format |
Article in Journal/Newspaper |
author |
Nicolas Dupont Frode B. Vikebø Øystein Langangen |
author_facet |
Nicolas Dupont Frode B. Vikebø Øystein Langangen |
author_sort |
Nicolas Dupont |
title |
Assessing the patchiness of early life stage of a fish stock (Gadus morhua) and its contribution to the stock recruitment |
title_short |
Assessing the patchiness of early life stage of a fish stock (Gadus morhua) and its contribution to the stock recruitment |
title_full |
Assessing the patchiness of early life stage of a fish stock (Gadus morhua) and its contribution to the stock recruitment |
title_fullStr |
Assessing the patchiness of early life stage of a fish stock (Gadus morhua) and its contribution to the stock recruitment |
title_full_unstemmed |
Assessing the patchiness of early life stage of a fish stock (Gadus morhua) and its contribution to the stock recruitment |
title_sort |
assessing the patchiness of early life stage of a fish stock (gadus morhua) and its contribution to the stock recruitment |
publisher |
Frontiers Media S.A. |
publishDate |
2022 |
url |
https://doi.org/10.3389/fmars.2022.932169 https://doaj.org/article/ea03ead6006c4fdca53b584e112251bc |
geographic |
Arctic Norway |
geographic_facet |
Arctic Norway |
genre |
Arctic Gadus morhua Zooplankton |
genre_facet |
Arctic Gadus morhua Zooplankton |
op_source |
Frontiers in Marine Science, Vol 9 (2022) |
op_relation |
https://www.frontiersin.org/articles/10.3389/fmars.2022.932169/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2022.932169 https://doaj.org/article/ea03ead6006c4fdca53b584e112251bc |
op_doi |
https://doi.org/10.3389/fmars.2022.932169 |
container_title |
Frontiers in Marine Science |
container_volume |
9 |
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1766343289047351296 |