Supplementary material from "Swimbladder morphology masks Southern Ocean mesopelagic fish biomass"
Within the twilight of the oceanic mesopelagic realm, 200–1000 m below sea level, are potentially vast resources of fish. Collectively, these mesopelagic fishes are the most abundant vertebrates on Earth, and this global fish community plays a vital role in the function of oceanic ecosystems. The bi...
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ftdatacite:10.6084/m9.figshare.c.4498925.v1 2023-05-15T13:30:53+02:00 Supplementary material from "Swimbladder morphology masks Southern Ocean mesopelagic fish biomass" Dornan, Tracey Fielding, Sophie Saunders, Ryan A. Genner, Martin J. 2019 https://dx.doi.org/10.6084/m9.figshare.c.4498925.v1 https://rs.figshare.com/collections/Supplementary_material_from_Swimbladder_morphology_masks_Southern_Ocean_mesopelagic_fish_biomass_/4498925/1 unknown Figshare https://dx.doi.org/10.1098/rspb.2019.0353 https://dx.doi.org/10.6084/m9.figshare.c.4498925 CC BY 4.0 https://creativecommons.org/licenses/by/4.0 CC-BY Environmental Science Ecology FOS Biological sciences Collection article 2019 ftdatacite https://doi.org/10.6084/m9.figshare.c.4498925.v1 https://doi.org/10.1098/rspb.2019.0353 https://doi.org/10.6084/m9.figshare.c.4498925 2021-11-05T12:55:41Z Within the twilight of the oceanic mesopelagic realm, 200–1000 m below sea level, are potentially vast resources of fish. Collectively, these mesopelagic fishes are the most abundant vertebrates on Earth, and this global fish community plays a vital role in the function of oceanic ecosystems. The biomass of these fishes has recently been estimated using acoustic survey methods, which rely on echosounder-generated signals being reflected from gas-filled swimbladders and detected by transducers on vessels. Here, we use X-ray computed tomography scans to demonstrate that several of the most abundant species of mesopelagic fish in the Southern Ocean lack gas-filled swimbladders. We also show using catch data from survey trawls that the fish community switches from fish possessing gas-filled swimbladders to those lacking swimbladders as latitude increases towards the Antarctic continent. Thus, the acoustic surveys that repeatedly show a decrease in mesopelagic fish biomass towards polar environments systematically overlook a large proportion of fish species that dominate polar seas. Importantly, this includes lanternfish species that are key prey items for top predators in the region, including king penguins and elephant seals. This latitudinal community switch, from gas to non-gas dominance, has considerable implications for acoustic biomass estimation, ecosystem modelling and long-term monitoring of species at risk from climate change and potential exploitation. Article in Journal/Newspaper Antarc* Antarctic Elephant Seals King Penguins Southern Ocean DataCite Metadata Store (German National Library of Science and Technology) Antarctic Southern Ocean The Antarctic |
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Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
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language |
unknown |
topic |
Environmental Science Ecology FOS Biological sciences |
spellingShingle |
Environmental Science Ecology FOS Biological sciences Dornan, Tracey Fielding, Sophie Saunders, Ryan A. Genner, Martin J. Supplementary material from "Swimbladder morphology masks Southern Ocean mesopelagic fish biomass" |
topic_facet |
Environmental Science Ecology FOS Biological sciences |
description |
Within the twilight of the oceanic mesopelagic realm, 200–1000 m below sea level, are potentially vast resources of fish. Collectively, these mesopelagic fishes are the most abundant vertebrates on Earth, and this global fish community plays a vital role in the function of oceanic ecosystems. The biomass of these fishes has recently been estimated using acoustic survey methods, which rely on echosounder-generated signals being reflected from gas-filled swimbladders and detected by transducers on vessels. Here, we use X-ray computed tomography scans to demonstrate that several of the most abundant species of mesopelagic fish in the Southern Ocean lack gas-filled swimbladders. We also show using catch data from survey trawls that the fish community switches from fish possessing gas-filled swimbladders to those lacking swimbladders as latitude increases towards the Antarctic continent. Thus, the acoustic surveys that repeatedly show a decrease in mesopelagic fish biomass towards polar environments systematically overlook a large proportion of fish species that dominate polar seas. Importantly, this includes lanternfish species that are key prey items for top predators in the region, including king penguins and elephant seals. This latitudinal community switch, from gas to non-gas dominance, has considerable implications for acoustic biomass estimation, ecosystem modelling and long-term monitoring of species at risk from climate change and potential exploitation. |
format |
Article in Journal/Newspaper |
author |
Dornan, Tracey Fielding, Sophie Saunders, Ryan A. Genner, Martin J. |
author_facet |
Dornan, Tracey Fielding, Sophie Saunders, Ryan A. Genner, Martin J. |
author_sort |
Dornan, Tracey |
title |
Supplementary material from "Swimbladder morphology masks Southern Ocean mesopelagic fish biomass" |
title_short |
Supplementary material from "Swimbladder morphology masks Southern Ocean mesopelagic fish biomass" |
title_full |
Supplementary material from "Swimbladder morphology masks Southern Ocean mesopelagic fish biomass" |
title_fullStr |
Supplementary material from "Swimbladder morphology masks Southern Ocean mesopelagic fish biomass" |
title_full_unstemmed |
Supplementary material from "Swimbladder morphology masks Southern Ocean mesopelagic fish biomass" |
title_sort |
supplementary material from "swimbladder morphology masks southern ocean mesopelagic fish biomass" |
publisher |
Figshare |
publishDate |
2019 |
url |
https://dx.doi.org/10.6084/m9.figshare.c.4498925.v1 https://rs.figshare.com/collections/Supplementary_material_from_Swimbladder_morphology_masks_Southern_Ocean_mesopelagic_fish_biomass_/4498925/1 |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Elephant Seals King Penguins Southern Ocean |
genre_facet |
Antarc* Antarctic Elephant Seals King Penguins Southern Ocean |
op_relation |
https://dx.doi.org/10.1098/rspb.2019.0353 https://dx.doi.org/10.6084/m9.figshare.c.4498925 |
op_rights |
CC BY 4.0 https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.6084/m9.figshare.c.4498925.v1 https://doi.org/10.1098/rspb.2019.0353 https://doi.org/10.6084/m9.figshare.c.4498925 |
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1766013507625549824 |