Testing angular velocity as a new metric for metabolic demands of slow-moving marine fauna: a case study with Giant spider conchs Lambis truncata

Hopkins, Lloyd; Geraldi, Nathan R.; Pope, Ed; Holton, Mark; Rivera, Miguel Lurgi; Duarte, Carlos M.; Wilson, Rory

doi:10.1186/s40317-021-00255-x

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Testing angular velocity as a new metric for metabolic demands of slow-moving marine fauna: a case study with Giant spider conchs Lambis truncata

Lloyd Hopkins, Nathan R. Geraldi, Ed Pope

, Mark Holton

, Miguel Lurgi Rivera

, Carlos M. Duarte, Rory Wilson

Animal Biotelemetry, Volume: 9, Issue: 1

Swansea University Authors: Lloyd Hopkins, Ed Pope , Mark Holton , Miguel Lurgi Rivera , Rory Wilson

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DOI (Published version): 10.1186/s40317-021-00255-x

Abstract

BackgroundQuantifying metabolic rate in free-living animals is invaluable in understanding the costs of behaviour and movement for individuals and communities. Dynamic body acceleration (DBA) metrics, such as vectoral DBA (VeDBA), are commonly used as proxies for the energy expenditure of movement b...

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Published in:	Animal Biotelemetry
ISSN:	2050-3385
Published:	Springer Science and Business Media LLC 2021
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Dynamic body acceleration (DBA) metrics, such as vectoral DBA (VeDBA), are commonly used as proxies for the energy expenditure of movement but are of limited applicability for slow-moving species. It has recently been suggested that metrics based on angular velocity might be better suited to characterise their energetics. We investigated whether a novel metric—the ‘Rate of change of Rotational Movement (RocRM)’, calculated from the vectoral sum of change in the pitch, roll and yaw/heading axes over a given length of time, is a suitable proxy for energy expenditure.ResultsWe found that RocRM can be used as an alternative energy expenditure proxy in a slow-moving benthic invertebrate. Eleven Giant spider conchs Lambis truncata (collected in the Red Sea) were instrumented with multiple channel (Daily Diary) tags and kept in sealed chambers for 5 h while their oxygen consumption, V̇O2, was measured. We found RocRM to be positively correlated with V̇O2, this relationship being affected by the time-step (i.e. the range of the calculated differential) of the RocRM. Time steps of 1, 5, 10 and 60 s yielded an explained variability of between 15 and 31%. The relationship between V̇O2 and VeDBA was not statistically significant, suggesting RocRM to provide more accurate estimations of metabolic rates in L. truncata.ConclusionsRocRM proved to be a statistically significant predictor of V̇O2 where VeDBA did not, validating the approach of using angular-based metrics over dynamic movement-based ones for slower moving animals. Further work is required to validate the use of RocRM for other species, particularly in animals with minimally dynamic movement, to better understand energetic costs of whole ecosystems. Unexplained variability in the models might be a consequence of the methodology used, but also likely a result of conch activity that does not manifest in movement of the shell. Additionally, density plots of mean RocRM at each time-step suggest differences in movement scales, which may collectively be useful as a species fingerprint of movement going forward.</abstract><type>Journal Article</type><journal>Animal Biotelemetry</journal><volume>9</volume><journalNumber>1</journalNumber><paginationStart/><paginationEnd/><publisher>Springer Science and Business Media LLC</publisher><placeOfPublication/><isbnPrint/><isbnElectronic/><issnPrint/><issnElectronic>2050-3385</issnElectronic><keywords>Angular velocity, Dynamic body acceleration (DBA), Energy expenditure, Movement costs, RocRM,Rotational movement</keywords><publishedDay>7</publishedDay><publishedMonth>9</publishedMonth><publishedYear>2021</publishedYear><publishedDate>2021-09-07</publishedDate><doi>10.1186/s40317-021-00255-x</doi><url/><notes/><college>COLLEGE NANME</college><CollegeCode>COLLEGE CODE</CollegeCode><institution>Swansea University</institution><apcterm/><funders>KAUST-funded studentship</funders><lastEdited>2021-10-22T16:42:19.1073064</lastEdited><Created>2021-09-27T09:55:49.3998244</Created><path><level id="1">Faculty of Science and Engineering</level><level id="2">School of Biosciences, Geography and Physics - Biosciences</level></path><authors><author><firstname>Lloyd</firstname><surname>Hopkins</surname><order>1</order></author><author><firstname>Nathan R.</firstname><surname>Geraldi</surname><order>2</order></author><author><firstname>Ed</firstname><surname>Pope</surname><orcid>0000-0001-5781-5575</orcid><order>3</order></author><author><firstname>Mark</firstname><surname>Holton</surname><orcid>0000-0001-8834-3283</orcid><order>4</order></author><author><firstname>Miguel</firstname><surname>Lurgi Rivera</surname><orcid>0000-0001-9891-895X</orcid><order>5</order></author><author><firstname>Carlos M.</firstname><surname>Duarte</surname><order>6</order></author><author><firstname>Rory</firstname><surname>Wilson</surname><orcid>0000-0003-3177-0177</orcid><order>7</order></author></authors><documents><document><filename>58099__21005__f8f822700bbb4588a0216df72be05458.pdf</filename><originalFilename>58099.pdf</originalFilename><uploaded>2021-09-27T09:59:48.9862642</uploaded><type>Output</type><contentLength>1611667</contentLength><contentType>application/pdf</contentType><version>Version of Record</version><cronfaStatus>true</cronfaStatus><documentNotes>© The Author(s) 2021. 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spelling	2021-10-22T16:42:19.1073064 v2 58099 2021-09-27 Testing angular velocity as a new metric for metabolic demands of slow-moving marine fauna: a case study with Giant spider conchs Lambis truncata 4aff8f36ad7e5154e2a8ee35ffe55e29 Lloyd Hopkins Lloyd Hopkins true false cc94aaa2d177220c8df0b3b3edae1370 0000-0001-5781-5575 Ed Pope Ed Pope true false 0e1d89d0cc934a740dcd0a873aed178e 0000-0001-8834-3283 Mark Holton Mark Holton true false 947df89d116a1ab75515e421089e0443 0000-0001-9891-895X Miguel Lurgi Rivera Miguel Lurgi Rivera true false 017bc6dd155098860945dc6249c4e9bc 0000-0003-3177-0177 Rory Wilson Rory Wilson true false 2021-09-27 BackgroundQuantifying metabolic rate in free-living animals is invaluable in understanding the costs of behaviour and movement for individuals and communities. Dynamic body acceleration (DBA) metrics, such as vectoral DBA (VeDBA), are commonly used as proxies for the energy expenditure of movement but are of limited applicability for slow-moving species. It has recently been suggested that metrics based on angular velocity might be better suited to characterise their energetics. We investigated whether a novel metric—the ‘Rate of change of Rotational Movement (RocRM)’, calculated from the vectoral sum of change in the pitch, roll and yaw/heading axes over a given length of time, is a suitable proxy for energy expenditure.ResultsWe found that RocRM can be used as an alternative energy expenditure proxy in a slow-moving benthic invertebrate. Eleven Giant spider conchs Lambis truncata (collected in the Red Sea) were instrumented with multiple channel (Daily Diary) tags and kept in sealed chambers for 5 h while their oxygen consumption, V̇O2, was measured. We found RocRM to be positively correlated with V̇O2, this relationship being affected by the time-step (i.e. the range of the calculated differential) of the RocRM. Time steps of 1, 5, 10 and 60 s yielded an explained variability of between 15 and 31%. The relationship between V̇O2 and VeDBA was not statistically significant, suggesting RocRM to provide more accurate estimations of metabolic rates in L. truncata.ConclusionsRocRM proved to be a statistically significant predictor of V̇O2 where VeDBA did not, validating the approach of using angular-based metrics over dynamic movement-based ones for slower moving animals. Further work is required to validate the use of RocRM for other species, particularly in animals with minimally dynamic movement, to better understand energetic costs of whole ecosystems. Unexplained variability in the models might be a consequence of the methodology used, but also likely a result of conch activity that does not manifest in movement of the shell. Additionally, density plots of mean RocRM at each time-step suggest differences in movement scales, which may collectively be useful as a species fingerprint of movement going forward. Journal Article Animal Biotelemetry 9 1 Springer Science and Business Media LLC 2050-3385 Angular velocity, Dynamic body acceleration (DBA), Energy expenditure, Movement costs, RocRM,Rotational movement 7 9 2021 2021-09-07 10.1186/s40317-021-00255-x COLLEGE NANME COLLEGE CODE Swansea University KAUST-funded studentship 2021-10-22T16:42:19.1073064 2021-09-27T09:55:49.3998244 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Biosciences Lloyd Hopkins 1 Nathan R. Geraldi 2 Ed Pope 0000-0001-5781-5575 3 Mark Holton 0000-0001-8834-3283 4 Miguel Lurgi Rivera 0000-0001-9891-895X 5 Carlos M. Duarte 6 Rory Wilson 0000-0003-3177-0177 7 58099__21005__f8f822700bbb4588a0216df72be05458.pdf 58099.pdf 2021-09-27T09:59:48.9862642 Output 1611667 application/pdf Version of Record true © The Author(s) 2021. This article is licensed under a Creative Commons Attribution 4.0 International License true eng https://creativecommons.org/licenses/by/4.0/
title	Testing angular velocity as a new metric for metabolic demands of slow-moving marine fauna: a case study with Giant spider conchs Lambis truncata
spellingShingle	Testing angular velocity as a new metric for metabolic demands of slow-moving marine fauna: a case study with Giant spider conchs Lambis truncata Lloyd Hopkins Ed Pope Mark Holton Miguel Lurgi Rivera Rory Wilson
title_short	Testing angular velocity as a new metric for metabolic demands of slow-moving marine fauna: a case study with Giant spider conchs Lambis truncata
title_full	Testing angular velocity as a new metric for metabolic demands of slow-moving marine fauna: a case study with Giant spider conchs Lambis truncata
title_fullStr	Testing angular velocity as a new metric for metabolic demands of slow-moving marine fauna: a case study with Giant spider conchs Lambis truncata
title_full_unstemmed	Testing angular velocity as a new metric for metabolic demands of slow-moving marine fauna: a case study with Giant spider conchs Lambis truncata
title_sort	Testing angular velocity as a new metric for metabolic demands of slow-moving marine fauna: a case study with Giant spider conchs Lambis truncata
author_id_str_mv	4aff8f36ad7e5154e2a8ee35ffe55e29 cc94aaa2d177220c8df0b3b3edae1370 0e1d89d0cc934a740dcd0a873aed178e 947df89d116a1ab75515e421089e0443 017bc6dd155098860945dc6249c4e9bc
author_id_fullname_str_mv	4aff8f36ad7e5154e2a8ee35ffe55e29_*_Lloyd Hopkins cc94aaa2d177220c8df0b3b3edae1370__Ed Pope 0e1d89d0cc934a740dcd0a873aed178e__Mark Holton 947df89d116a1ab75515e421089e0443__Miguel Lurgi Rivera 017bc6dd155098860945dc6249c4e9bc_**_Rory Wilson
author	Lloyd Hopkins Ed Pope Mark Holton Miguel Lurgi Rivera Rory Wilson
author2	Lloyd Hopkins Nathan R. Geraldi Ed Pope Mark Holton Miguel Lurgi Rivera Carlos M. Duarte Rory Wilson
format	Journal article
container_title	Animal Biotelemetry
container_volume	9
container_issue	1
publishDate	2021
institution	Swansea University
issn	2050-3385
doi_str_mv	10.1186/s40317-021-00255-x
publisher	Springer Science and Business Media LLC
college_str	Faculty of Science and Engineering
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hierarchy_top_title	Faculty of Science and Engineering
hierarchy_parent_id	facultyofscienceandengineering
hierarchy_parent_title	Faculty of Science and Engineering
department_str	School of Biosciences, Geography and Physics - Biosciences{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Biosciences
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description	BackgroundQuantifying metabolic rate in free-living animals is invaluable in understanding the costs of behaviour and movement for individuals and communities. Dynamic body acceleration (DBA) metrics, such as vectoral DBA (VeDBA), are commonly used as proxies for the energy expenditure of movement but are of limited applicability for slow-moving species. It has recently been suggested that metrics based on angular velocity might be better suited to characterise their energetics. We investigated whether a novel metric—the ‘Rate of change of Rotational Movement (RocRM)’, calculated from the vectoral sum of change in the pitch, roll and yaw/heading axes over a given length of time, is a suitable proxy for energy expenditure.ResultsWe found that RocRM can be used as an alternative energy expenditure proxy in a slow-moving benthic invertebrate. Eleven Giant spider conchs Lambis truncata (collected in the Red Sea) were instrumented with multiple channel (Daily Diary) tags and kept in sealed chambers for 5 h while their oxygen consumption, V̇O2, was measured. We found RocRM to be positively correlated with V̇O2, this relationship being affected by the time-step (i.e. the range of the calculated differential) of the RocRM. Time steps of 1, 5, 10 and 60 s yielded an explained variability of between 15 and 31%. The relationship between V̇O2 and VeDBA was not statistically significant, suggesting RocRM to provide more accurate estimations of metabolic rates in L. truncata.ConclusionsRocRM proved to be a statistically significant predictor of V̇O2 where VeDBA did not, validating the approach of using angular-based metrics over dynamic movement-based ones for slower moving animals. Further work is required to validate the use of RocRM for other species, particularly in animals with minimally dynamic movement, to better understand energetic costs of whole ecosystems. Unexplained variability in the models might be a consequence of the methodology used, but also likely a result of conch activity that does not manifest in movement of the shell. Additionally, density plots of mean RocRM at each time-step suggest differences in movement scales, which may collectively be useful as a species fingerprint of movement going forward.
published_date	2021-09-07T04:14:21Z
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Testing angular velocity as a new metric for metabolic demands of slow-moving marine fauna: a case study with Giant spider conchs Lambis truncata

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