Supplementary material from "Aerial photogrammetry and tag-derived tissue density reveal patterns of lipid-store body condition of humpback whales on their feeding grounds"
Monitoring the body condition of free-ranging marine mammals at different life-history stages is essential to understand their ecology as they must accumulate sufficient energy reserves for survival and reproduction. However, assessing body condition in free-ranging marine mammals is challenging. We...
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The Royal Society
2021
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Online Access: | https://dx.doi.org/10.6084/m9.figshare.c.5271301.v2 https://rs.figshare.com/collections/Supplementary_material_from_Aerial_photogrammetry_and_tag-derived_tissue_density_reveal_patterns_of_lipid-store_body_condition_of_humpback_whales_on_their_feeding_grounds_/5271301/2 |
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ftdatacite:10.6084/m9.figshare.c.5271301.v2 2023-05-15T17:10:51+02:00 Supplementary material from "Aerial photogrammetry and tag-derived tissue density reveal patterns of lipid-store body condition of humpback whales on their feeding grounds" Aoki, Kagari Isojunno, Saana Bellot, Charlotte Iwata, Takashi Kershaw, Joanna Akiyama, Yu López, Lucía Martina Martín Ramp, Christian Biuw, Martin Swift, René Wensveen, Paul J. Pomeroy, Patrick Narazaki, Tomoko Hall, Ailsa Katsufumi Sato Miller, Patrick J. O. 2021 https://dx.doi.org/10.6084/m9.figshare.c.5271301.v2 https://rs.figshare.com/collections/Supplementary_material_from_Aerial_photogrammetry_and_tag-derived_tissue_density_reveal_patterns_of_lipid-store_body_condition_of_humpback_whales_on_their_feeding_grounds_/5271301/2 unknown The Royal Society https://dx.doi.org/10.1098/rspb.2020.2307 https://dx.doi.org/10.6084/m9.figshare.c.5271301 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 CC-BY Ecology FOS Biological sciences 110601 Biomechanics FOS Health sciences 60801 Animal Behaviour Collection article 2021 ftdatacite https://doi.org/10.6084/m9.figshare.c.5271301.v2 https://doi.org/10.1098/rspb.2020.2307 https://doi.org/10.6084/m9.figshare.c.5271301 2021-11-05T12:55:41Z Monitoring the body condition of free-ranging marine mammals at different life-history stages is essential to understand their ecology as they must accumulate sufficient energy reserves for survival and reproduction. However, assessing body condition in free-ranging marine mammals is challenging. We cross-validated two independent approaches to estimate the body condition of humpback whales ( Megaptera novaeangliae ) at two feeding grounds in Canada and Norway: animal-borne tags ( N = 59) and aerial photogrammetry ( N = 55). Whales that had a large length-standardized projected area in overhead images (i.e. whales looked fatter) had lower estimated tissue body density (TBD) (greater lipid stores) from tag data. Linking both measurements in a Bayesian hierarchical model to estimate the true underlying (hidden) tissue body density (uTBD), we found uTBD was lower (−3.5 kg m −3 ) in pregnant females compared to adult males and resting females, while in lactating females it was higher (+6.0 kg m −3 ). Whales were more negatively buoyant (+5.0 kg m −3 ) in Norway than Canada during the early feeding season, possibly due to a longer migration from breeding areas. While uTBD decreased over the feeding season across life-history traits, whale tissues remained negatively buoyant (1035.3 ± 3.8 kg m −3 ) in the late feeding season. This study adds confidence to the effectiveness of these independent methods to estimate the body condition of free-ranging whales. Article in Journal/Newspaper Megaptera novaeangliae DataCite Metadata Store (German National Library of Science and Technology) Canada Norway |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Ecology FOS Biological sciences 110601 Biomechanics FOS Health sciences 60801 Animal Behaviour |
spellingShingle |
Ecology FOS Biological sciences 110601 Biomechanics FOS Health sciences 60801 Animal Behaviour Aoki, Kagari Isojunno, Saana Bellot, Charlotte Iwata, Takashi Kershaw, Joanna Akiyama, Yu López, Lucía Martina Martín Ramp, Christian Biuw, Martin Swift, René Wensveen, Paul J. Pomeroy, Patrick Narazaki, Tomoko Hall, Ailsa Katsufumi Sato Miller, Patrick J. O. Supplementary material from "Aerial photogrammetry and tag-derived tissue density reveal patterns of lipid-store body condition of humpback whales on their feeding grounds" |
topic_facet |
Ecology FOS Biological sciences 110601 Biomechanics FOS Health sciences 60801 Animal Behaviour |
description |
Monitoring the body condition of free-ranging marine mammals at different life-history stages is essential to understand their ecology as they must accumulate sufficient energy reserves for survival and reproduction. However, assessing body condition in free-ranging marine mammals is challenging. We cross-validated two independent approaches to estimate the body condition of humpback whales ( Megaptera novaeangliae ) at two feeding grounds in Canada and Norway: animal-borne tags ( N = 59) and aerial photogrammetry ( N = 55). Whales that had a large length-standardized projected area in overhead images (i.e. whales looked fatter) had lower estimated tissue body density (TBD) (greater lipid stores) from tag data. Linking both measurements in a Bayesian hierarchical model to estimate the true underlying (hidden) tissue body density (uTBD), we found uTBD was lower (−3.5 kg m −3 ) in pregnant females compared to adult males and resting females, while in lactating females it was higher (+6.0 kg m −3 ). Whales were more negatively buoyant (+5.0 kg m −3 ) in Norway than Canada during the early feeding season, possibly due to a longer migration from breeding areas. While uTBD decreased over the feeding season across life-history traits, whale tissues remained negatively buoyant (1035.3 ± 3.8 kg m −3 ) in the late feeding season. This study adds confidence to the effectiveness of these independent methods to estimate the body condition of free-ranging whales. |
format |
Article in Journal/Newspaper |
author |
Aoki, Kagari Isojunno, Saana Bellot, Charlotte Iwata, Takashi Kershaw, Joanna Akiyama, Yu López, Lucía Martina Martín Ramp, Christian Biuw, Martin Swift, René Wensveen, Paul J. Pomeroy, Patrick Narazaki, Tomoko Hall, Ailsa Katsufumi Sato Miller, Patrick J. O. |
author_facet |
Aoki, Kagari Isojunno, Saana Bellot, Charlotte Iwata, Takashi Kershaw, Joanna Akiyama, Yu López, Lucía Martina Martín Ramp, Christian Biuw, Martin Swift, René Wensveen, Paul J. Pomeroy, Patrick Narazaki, Tomoko Hall, Ailsa Katsufumi Sato Miller, Patrick J. O. |
author_sort |
Aoki, Kagari |
title |
Supplementary material from "Aerial photogrammetry and tag-derived tissue density reveal patterns of lipid-store body condition of humpback whales on their feeding grounds" |
title_short |
Supplementary material from "Aerial photogrammetry and tag-derived tissue density reveal patterns of lipid-store body condition of humpback whales on their feeding grounds" |
title_full |
Supplementary material from "Aerial photogrammetry and tag-derived tissue density reveal patterns of lipid-store body condition of humpback whales on their feeding grounds" |
title_fullStr |
Supplementary material from "Aerial photogrammetry and tag-derived tissue density reveal patterns of lipid-store body condition of humpback whales on their feeding grounds" |
title_full_unstemmed |
Supplementary material from "Aerial photogrammetry and tag-derived tissue density reveal patterns of lipid-store body condition of humpback whales on their feeding grounds" |
title_sort |
supplementary material from "aerial photogrammetry and tag-derived tissue density reveal patterns of lipid-store body condition of humpback whales on their feeding grounds" |
publisher |
The Royal Society |
publishDate |
2021 |
url |
https://dx.doi.org/10.6084/m9.figshare.c.5271301.v2 https://rs.figshare.com/collections/Supplementary_material_from_Aerial_photogrammetry_and_tag-derived_tissue_density_reveal_patterns_of_lipid-store_body_condition_of_humpback_whales_on_their_feeding_grounds_/5271301/2 |
geographic |
Canada Norway |
geographic_facet |
Canada Norway |
genre |
Megaptera novaeangliae |
genre_facet |
Megaptera novaeangliae |
op_relation |
https://dx.doi.org/10.1098/rspb.2020.2307 https://dx.doi.org/10.6084/m9.figshare.c.5271301 |
op_rights |
Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.6084/m9.figshare.c.5271301.v2 https://doi.org/10.1098/rspb.2020.2307 https://doi.org/10.6084/m9.figshare.c.5271301 |
_version_ |
1766067512725733376 |