dc.contributor |
University of Iceland |
dc.contributor.author |
Aoki, Kagari |
dc.contributor.author |
Isojunno, Saana |
dc.contributor.author |
Bellot, Charlotte |
dc.contributor.author |
Iwata, Takashi |
dc.contributor.author |
Kershaw, Joanna |
dc.contributor.author |
Akiyama, Yu |
dc.contributor.author |
Martín López, Lucía M. |
dc.contributor.author |
Ramp, Christian |
dc.contributor.author |
Biuw, Martin |
dc.contributor.author |
Swift, René |
dc.contributor.author |
Wensveen, Paulus Jacobus |
dc.contributor.author |
Pomeroy, Patrick |
dc.contributor.author |
Narazaki, Tomoko |
dc.contributor.author |
Hall, Ailsa |
dc.contributor.author |
Sato, Katsufumi |
dc.contributor.author |
Miller, Patrick J.O. |
dc.date.accessioned |
2021-11-18T01:01:27Z |
dc.date.available |
2021-11-18T01:01:27Z |
dc.date.issued |
2021-01-27 |
dc.identifier.citation |
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 |
dc.identifier.issn |
0962-8452 |
dc.identifier.other |
41973258 |
dc.identifier.other |
54545f78-03ee-4a0e-8593-6da485980e7f |
dc.identifier.other |
85100477627 |
dc.identifier.other |
33499785 |
dc.identifier.uri |
https://hdl.handle.net/20.500.11815/2715 |
dc.description |
Publisher Copyright: © 2021 The Authors. |
dc.description.abstract |
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. |
dc.format.extent |
1932621 |
dc.format.extent |
20202307 |
dc.language.iso |
en |
dc.relation.ispartofseries |
Proceedings of the Royal Society B: Biological Sciences; 288(1943) |
dc.rights |
info:eu-repo/semantics/openAccess |
dc.subject |
Hnúfubakur |
dc.subject |
Sjávarlíffræði |
dc.subject |
animal-borne sensor |
dc.subject |
cetacean |
dc.subject |
feeding season |
dc.subject |
neutral buoyancy |
dc.subject |
tissue body density |
dc.subject |
UAV |
dc.subject |
General Immunology and Microbiology |
dc.subject |
General Biochemistry,Genetics and Molecular Biology |
dc.subject |
General Environmental Science |
dc.subject |
General Agricultural and Biological Sciences |
dc.title |
Aerial photogrammetry and tag-derived tissue density reveal patterns of lipid-store body condition of humpback whales on their feeding grounds |
dc.type |
/dk/atira/pure/researchoutput/researchoutputtypes/contributiontojournal/article |
dc.description.version |
Peer reviewed |
dc.identifier.doi |
10.1098/rspb.2020.2307 |
dc.relation.url |
http://www.scopus.com/inward/record.url?scp=85100477627&partnerID=8YFLogxK |