Fine-scale structures as spots of increased fish concentration in the open ocean
Abstract Oceanic frontal zones have been shown to deeply influence the distribution of primary producers and, at the other extreme of the trophic web, top predators. However, the relationship between these structures and intermediate trophic levels is much more obscure. In this paper we address this...
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crspringernat:10.1038/s41598-021-94368-1 2023-05-15T18:25:35+02:00 Fine-scale structures as spots of increased fish concentration in the open ocean Baudena, Alberto Ser-Giacomi, Enrico D’Onofrio, Donatella Capet, Xavier Cotté, Cedric Cherel, Yves D’Ovidio, Francesco 2021 http://dx.doi.org/10.1038/s41598-021-94368-1 https://www.nature.com/articles/s41598-021-94368-1.pdf https://www.nature.com/articles/s41598-021-94368-1 en eng Springer Science and Business Media LLC https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 CC-BY Scientific Reports volume 11, issue 1 ISSN 2045-2322 Multidisciplinary journal-article 2021 crspringernat https://doi.org/10.1038/s41598-021-94368-1 2022-01-04T13:47:37Z Abstract Oceanic frontal zones have been shown to deeply influence the distribution of primary producers and, at the other extreme of the trophic web, top predators. However, the relationship between these structures and intermediate trophic levels is much more obscure. In this paper we address this knowledge gap by comparing acoustic measurements of mesopelagic fish concentrations to satellite-derived fine-scale Lagrangian Coherent Structures in the Indian sector of the Southern Ocean. First, we demonstrate that higher fish concentrations occur more frequently in correspondence with strong Lagrangian Coherent Structures. Secondly, we illustrate that, while increased fish densities are more likely to be observed over these structures, the presence of a fine-scale feature does not imply a concomitant fish accumulation, as other factors affect fish distribution. Thirdly, we show that, when only chlorophyll-rich waters are considered, front intensity modulates significantly more the local fish concentration. Finally, we discuss a model representing fish movement along Lagrangian features, specifically built for mid-trophic levels. Its results, obtained with realistic parameters, are qualitatively consistent with the observations and the spatio-temporal scales analysed. Overall, these findings may help to integrate intermediate trophic levels in trophic models, which can ultimately support management and conservation policies. Article in Journal/Newspaper Southern Ocean Springer Nature (via Crossref) Southern Ocean Indian Scientific Reports 11 1 |
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Springer Nature (via Crossref) |
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crspringernat |
language |
English |
topic |
Multidisciplinary |
spellingShingle |
Multidisciplinary Baudena, Alberto Ser-Giacomi, Enrico D’Onofrio, Donatella Capet, Xavier Cotté, Cedric Cherel, Yves D’Ovidio, Francesco Fine-scale structures as spots of increased fish concentration in the open ocean |
topic_facet |
Multidisciplinary |
description |
Abstract Oceanic frontal zones have been shown to deeply influence the distribution of primary producers and, at the other extreme of the trophic web, top predators. However, the relationship between these structures and intermediate trophic levels is much more obscure. In this paper we address this knowledge gap by comparing acoustic measurements of mesopelagic fish concentrations to satellite-derived fine-scale Lagrangian Coherent Structures in the Indian sector of the Southern Ocean. First, we demonstrate that higher fish concentrations occur more frequently in correspondence with strong Lagrangian Coherent Structures. Secondly, we illustrate that, while increased fish densities are more likely to be observed over these structures, the presence of a fine-scale feature does not imply a concomitant fish accumulation, as other factors affect fish distribution. Thirdly, we show that, when only chlorophyll-rich waters are considered, front intensity modulates significantly more the local fish concentration. Finally, we discuss a model representing fish movement along Lagrangian features, specifically built for mid-trophic levels. Its results, obtained with realistic parameters, are qualitatively consistent with the observations and the spatio-temporal scales analysed. Overall, these findings may help to integrate intermediate trophic levels in trophic models, which can ultimately support management and conservation policies. |
format |
Article in Journal/Newspaper |
author |
Baudena, Alberto Ser-Giacomi, Enrico D’Onofrio, Donatella Capet, Xavier Cotté, Cedric Cherel, Yves D’Ovidio, Francesco |
author_facet |
Baudena, Alberto Ser-Giacomi, Enrico D’Onofrio, Donatella Capet, Xavier Cotté, Cedric Cherel, Yves D’Ovidio, Francesco |
author_sort |
Baudena, Alberto |
title |
Fine-scale structures as spots of increased fish concentration in the open ocean |
title_short |
Fine-scale structures as spots of increased fish concentration in the open ocean |
title_full |
Fine-scale structures as spots of increased fish concentration in the open ocean |
title_fullStr |
Fine-scale structures as spots of increased fish concentration in the open ocean |
title_full_unstemmed |
Fine-scale structures as spots of increased fish concentration in the open ocean |
title_sort |
fine-scale structures as spots of increased fish concentration in the open ocean |
publisher |
Springer Science and Business Media LLC |
publishDate |
2021 |
url |
http://dx.doi.org/10.1038/s41598-021-94368-1 https://www.nature.com/articles/s41598-021-94368-1.pdf https://www.nature.com/articles/s41598-021-94368-1 |
geographic |
Southern Ocean Indian |
geographic_facet |
Southern Ocean Indian |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Scientific Reports volume 11, issue 1 ISSN 2045-2322 |
op_rights |
https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/s41598-021-94368-1 |
container_title |
Scientific Reports |
container_volume |
11 |
container_issue |
1 |
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1766207131469479936 |