Aerial photogrammetry and tag-derived tissue density reveal patterns of lipid-store body condition of humpback whales on their feeding grounds
Publisher Copyright: © 2021 The Authors. 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-...
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ftopinvisindi:oai:opinvisindi.is:20.500.11815/2715 2023-05-15T17:10:52+02:00 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 Martín López, Lucía M. Ramp, Christian Biuw, Martin Swift, René Wensveen, Paulus Jacobus Pomeroy, Patrick Narazaki, Tomoko Hall, Ailsa Sato, Katsufumi Miller, Patrick J.O. University of Iceland 2021-01-27 20202307 https://hdl.handle.net/20.500.11815/2715 https://doi.org/10.1098/rspb.2020.2307 en eng Proceedings of the Royal Society B: Biological Sciences; 288(1943) http://www.scopus.com/inward/record.url?scp=85100477627&partnerID=8YFLogxK Aoki , K , Isojunno , S , Bellot , C , Iwata , T , Kershaw , J , Akiyama , Y , Martín López , L M , Ramp , C , Biuw , M , Swift , R , Wensveen , P J , Pomeroy , P , Narazaki , T , Hall , A , Sato , K & Miller , P J O 2021 , ' Aerial photogrammetry and tag-derived tissue density reveal patterns of lipid-store body condition of humpback whales on their feeding grounds ' , Proceedings of the Royal Society B: Biological Sciences , vol. 288 , no. 1943 , 20202307 , pp. 20202307 . https://doi.org/10.1098/rspb.2020.2307 0962-8452 PURE: 41973258 PURE UUID: 54545f78-03ee-4a0e-8593-6da485980e7f Scopus: 85100477627 https://hdl.handle.net/20.500.11815/2715 33499785 https://doi.org/10.1098/rspb.2020.2307 info:eu-repo/semantics/openAccess Hnúfubakur Sjávarlíffræði animal-borne sensor cetacean feeding season neutral buoyancy tissue body density UAV Immunology and Microbiology (all) Biochemistry Genetics and Molecular Biology (all) Environmental Science (all) Agricultural and Biological Sciences (all) /dk/atira/pure/researchoutput/researchoutputtypes/contributiontojournal/article 2021 ftopinvisindi https://doi.org/20.500.11815/2715 https://doi.org/10.1098/rspb.2020.2307 2022-11-18T06:52:13Z Publisher Copyright: © 2021 The Authors. 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 owing 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. Peer reviewed Article in Journal/Newspaper Megaptera novaeangliae Opin vísindi (Iceland) Canada Norway Proceedings of the Royal Society B: Biological Sciences 288 1943 20202307 |
institution |
Open Polar |
collection |
Opin vísindi (Iceland) |
op_collection_id |
ftopinvisindi |
language |
English |
topic |
Hnúfubakur Sjávarlíffræði animal-borne sensor cetacean feeding season neutral buoyancy tissue body density UAV Immunology and Microbiology (all) Biochemistry Genetics and Molecular Biology (all) Environmental Science (all) Agricultural and Biological Sciences (all) |
spellingShingle |
Hnúfubakur Sjávarlíffræði animal-borne sensor cetacean feeding season neutral buoyancy tissue body density UAV Immunology and Microbiology (all) Biochemistry Genetics and Molecular Biology (all) Environmental Science (all) Agricultural and Biological Sciences (all) Aoki, Kagari Isojunno, Saana Bellot, Charlotte Iwata, Takashi Kershaw, Joanna Akiyama, Yu Martín López, Lucía M. Ramp, Christian Biuw, Martin Swift, René Wensveen, Paulus Jacobus Pomeroy, Patrick Narazaki, Tomoko Hall, Ailsa Sato, Katsufumi Miller, Patrick J.O. Aerial photogrammetry and tag-derived tissue density reveal patterns of lipid-store body condition of humpback whales on their feeding grounds |
topic_facet |
Hnúfubakur Sjávarlíffræði animal-borne sensor cetacean feeding season neutral buoyancy tissue body density UAV Immunology and Microbiology (all) Biochemistry Genetics and Molecular Biology (all) Environmental Science (all) Agricultural and Biological Sciences (all) |
description |
Publisher Copyright: © 2021 The Authors. 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 owing 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. Peer reviewed |
author2 |
University of Iceland |
format |
Article in Journal/Newspaper |
author |
Aoki, Kagari Isojunno, Saana Bellot, Charlotte Iwata, Takashi Kershaw, Joanna Akiyama, Yu Martín López, Lucía M. Ramp, Christian Biuw, Martin Swift, René Wensveen, Paulus Jacobus Pomeroy, Patrick Narazaki, Tomoko Hall, Ailsa Sato, Katsufumi Miller, Patrick J.O. |
author_facet |
Aoki, Kagari Isojunno, Saana Bellot, Charlotte Iwata, Takashi Kershaw, Joanna Akiyama, Yu Martín López, Lucía M. Ramp, Christian Biuw, Martin Swift, René Wensveen, Paulus Jacobus Pomeroy, Patrick Narazaki, Tomoko Hall, Ailsa Sato, Katsufumi Miller, Patrick J.O. |
author_sort |
Aoki, Kagari |
title |
Aerial photogrammetry and tag-derived tissue density reveal patterns of lipid-store body condition of humpback whales on their feeding grounds |
title_short |
Aerial photogrammetry and tag-derived tissue density reveal patterns of lipid-store body condition of humpback whales on their feeding grounds |
title_full |
Aerial photogrammetry and tag-derived tissue density reveal patterns of lipid-store body condition of humpback whales on their feeding grounds |
title_fullStr |
Aerial photogrammetry and tag-derived tissue density reveal patterns of lipid-store body condition of humpback whales on their feeding grounds |
title_full_unstemmed |
Aerial photogrammetry and tag-derived tissue density reveal patterns of lipid-store body condition of humpback whales on their feeding grounds |
title_sort |
aerial photogrammetry and tag-derived tissue density reveal patterns of lipid-store body condition of humpback whales on their feeding grounds |
publishDate |
2021 |
url |
https://hdl.handle.net/20.500.11815/2715 https://doi.org/10.1098/rspb.2020.2307 |
geographic |
Canada Norway |
geographic_facet |
Canada Norway |
genre |
Megaptera novaeangliae |
genre_facet |
Megaptera novaeangliae |
op_relation |
Proceedings of the Royal Society B: Biological Sciences; 288(1943) http://www.scopus.com/inward/record.url?scp=85100477627&partnerID=8YFLogxK Aoki , K , Isojunno , S , Bellot , C , Iwata , T , Kershaw , J , Akiyama , Y , Martín López , L M , Ramp , C , Biuw , M , Swift , R , Wensveen , P J , Pomeroy , P , Narazaki , T , Hall , A , Sato , K & Miller , P J O 2021 , ' Aerial photogrammetry and tag-derived tissue density reveal patterns of lipid-store body condition of humpback whales on their feeding grounds ' , Proceedings of the Royal Society B: Biological Sciences , vol. 288 , no. 1943 , 20202307 , pp. 20202307 . https://doi.org/10.1098/rspb.2020.2307 0962-8452 PURE: 41973258 PURE UUID: 54545f78-03ee-4a0e-8593-6da485980e7f Scopus: 85100477627 https://hdl.handle.net/20.500.11815/2715 33499785 https://doi.org/10.1098/rspb.2020.2307 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/20.500.11815/2715 https://doi.org/10.1098/rspb.2020.2307 |
container_title |
Proceedings of the Royal Society B: Biological Sciences |
container_volume |
288 |
container_issue |
1943 |
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20202307 |
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1766067523839590400 |