Estimating resource acquisition and at-sea body condition of a marine predator
This article was made open access through BIS OA funding. (1) Body condition plays a fundamental role in many ecological and evolutionary processes at a variety of scales and across a broad range of animal taxa. An understanding of how body condition changes at fine spatial and temporal scales as a...
Published in: | Journal of Animal Ecology |
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Main Authors: | , , , , , , , , , , |
Other Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2013
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Subjects: | |
Online Access: | http://hdl.handle.net/10023/3867 https://doi.org/10.1111/1365-2656.12102 |
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ftstandrewserep:oai:research-repository.st-andrews.ac.uk:10023/3867 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
University of St Andrews: Digital Research Repository |
op_collection_id |
ftstandrewserep |
language |
English |
topic |
Resource acquisition Bayesian Elephant seals Markov chain Monte Carlo Satellite telemetry State-space model Body condition Año Nuevo Macquarie Island Q Science SDG 14 - Life Below Water Q |
spellingShingle |
Resource acquisition Bayesian Elephant seals Markov chain Monte Carlo Satellite telemetry State-space model Body condition Año Nuevo Macquarie Island Q Science SDG 14 - Life Below Water Q Schick, Robert Schilling New, Leslie Thomas, Len Costa, Daniel Hindell, Mark McMahon, Clive Robinson, Patrick Simmons, Samantha Thums, Michele Harwood, John Clark, James Estimating resource acquisition and at-sea body condition of a marine predator |
topic_facet |
Resource acquisition Bayesian Elephant seals Markov chain Monte Carlo Satellite telemetry State-space model Body condition Año Nuevo Macquarie Island Q Science SDG 14 - Life Below Water Q |
description |
This article was made open access through BIS OA funding. (1) Body condition plays a fundamental role in many ecological and evolutionary processes at a variety of scales and across a broad range of animal taxa. An understanding of how body condition changes at fine spatial and temporal scales as a result of interaction with the environment provides necessary information about how animals acquire resources. (2) However, comparatively little is known about intra- and interindividual variation of condition in marine systems. Where condition has been studied, changes typically are recorded at relatively coarse time-scales. By quantifying how fine-scale interaction with the environment influences condition, we can broaden our understanding of how animals acquire resources and allocate them to body stores. (3) Here we used a hierarchical Bayesian state-space model to estimate the body condition as measured by the size of an animal's lipid store in two closely related species of marine predator that occupy different hemispheres: northern elephant seals (Mirounga angustirostris) and southern elephant seals (Mirounga leonina). The observation model linked drift dives to lipid stores. The process model quantified daily changes in lipid stores as a function of the physiological condition of the seal (lipid:lean tissue ratio, departure lipid and departure mass), its foraging location, two measures of behaviour and environmental covariates. (4) We found that physiological condition significantly impacted lipid gain at two time-scales – daily and at departure from the colony – that foraging location was significantly associated with lipid gain in both species of elephant seals and that long-term behavioural phase was associated with positive lipid gain in northern and southern elephant seals. In northern elephant seals, the occurrence of short-term behavioural states assumed to represent foraging were correlated with lipid gain. Lipid gain was a function of covariates in both species. Southern elephant seals performed ... |
author2 |
Office of Naval Research University of St Andrews. School of Mathematics and Statistics University of St Andrews. Statistics University of St Andrews. Marine Alliance for Science & Technology Scotland University of St Andrews. Centre for Research into Ecological & Environmental Modelling University of St Andrews. School of Biology University of St Andrews. Scottish Oceans Institute University of St Andrews. St Andrews Sustainability Institute |
format |
Article in Journal/Newspaper |
author |
Schick, Robert Schilling New, Leslie Thomas, Len Costa, Daniel Hindell, Mark McMahon, Clive Robinson, Patrick Simmons, Samantha Thums, Michele Harwood, John Clark, James |
author_facet |
Schick, Robert Schilling New, Leslie Thomas, Len Costa, Daniel Hindell, Mark McMahon, Clive Robinson, Patrick Simmons, Samantha Thums, Michele Harwood, John Clark, James |
author_sort |
Schick, Robert Schilling |
title |
Estimating resource acquisition and at-sea body condition of a marine predator |
title_short |
Estimating resource acquisition and at-sea body condition of a marine predator |
title_full |
Estimating resource acquisition and at-sea body condition of a marine predator |
title_fullStr |
Estimating resource acquisition and at-sea body condition of a marine predator |
title_full_unstemmed |
Estimating resource acquisition and at-sea body condition of a marine predator |
title_sort |
estimating resource acquisition and at-sea body condition of a marine predator |
publishDate |
2013 |
url |
http://hdl.handle.net/10023/3867 https://doi.org/10.1111/1365-2656.12102 |
genre |
Elephant Seals Macquarie Island Mirounga leonina Southern Elephant Seals |
genre_facet |
Elephant Seals Macquarie Island Mirounga leonina Southern Elephant Seals |
op_relation |
Journal of Animal Ecology Schick , R S , New , L , Thomas , L , Costa , D , Hindell , M , McMahon , C , Robinson , P , Simmons , S , Thums , M , Harwood , J & Clark , J 2013 , ' Estimating resource acquisition and at-sea body condition of a marine predator ' , Journal of Animal Ecology , vol. 82 , no. 6 , pp. 1300-1315 . https://doi.org/10.1111/1365-2656.12102 0021-8790 PURE: 50927985 PURE UUID: 0679ef69-a682-4f21-89d8-31faeb2df5f4 Scopus: 84886293977 ORCID: /0000-0002-7436-067X/work/29591690 http://hdl.handle.net/10023/3867 https://doi.org/10.1111/1365-2656.12102 N00014-12-1-0286 |
op_rights |
© 2013 The Authors. Journal of Animal Ecology © 2013 British Ecological Society. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
op_doi |
https://doi.org/10.1111/1365-2656.12102 |
container_title |
Journal of Animal Ecology |
container_volume |
82 |
container_issue |
6 |
container_start_page |
1300 |
op_container_end_page |
1315 |
_version_ |
1770271631701180416 |
spelling |
ftstandrewserep:oai:research-repository.st-andrews.ac.uk:10023/3867 2023-07-02T03:32:08+02:00 Estimating resource acquisition and at-sea body condition of a marine predator Schick, Robert Schilling New, Leslie Thomas, Len Costa, Daniel Hindell, Mark McMahon, Clive Robinson, Patrick Simmons, Samantha Thums, Michele Harwood, John Clark, James Office of Naval Research University of St Andrews. School of Mathematics and Statistics University of St Andrews. Statistics University of St Andrews. Marine Alliance for Science & Technology Scotland University of St Andrews. Centre for Research into Ecological & Environmental Modelling University of St Andrews. School of Biology University of St Andrews. Scottish Oceans Institute University of St Andrews. St Andrews Sustainability Institute 2013-07-24T11:01:02Z 16 application/pdf http://hdl.handle.net/10023/3867 https://doi.org/10.1111/1365-2656.12102 eng eng Journal of Animal Ecology Schick , R S , New , L , Thomas , L , Costa , D , Hindell , M , McMahon , C , Robinson , P , Simmons , S , Thums , M , Harwood , J & Clark , J 2013 , ' Estimating resource acquisition and at-sea body condition of a marine predator ' , Journal of Animal Ecology , vol. 82 , no. 6 , pp. 1300-1315 . https://doi.org/10.1111/1365-2656.12102 0021-8790 PURE: 50927985 PURE UUID: 0679ef69-a682-4f21-89d8-31faeb2df5f4 Scopus: 84886293977 ORCID: /0000-0002-7436-067X/work/29591690 http://hdl.handle.net/10023/3867 https://doi.org/10.1111/1365-2656.12102 N00014-12-1-0286 © 2013 The Authors. Journal of Animal Ecology © 2013 British Ecological Society. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. Resource acquisition Bayesian Elephant seals Markov chain Monte Carlo Satellite telemetry State-space model Body condition Año Nuevo Macquarie Island Q Science SDG 14 - Life Below Water Q Journal article 2013 ftstandrewserep https://doi.org/10.1111/1365-2656.12102 2023-06-13T18:28:41Z This article was made open access through BIS OA funding. (1) Body condition plays a fundamental role in many ecological and evolutionary processes at a variety of scales and across a broad range of animal taxa. An understanding of how body condition changes at fine spatial and temporal scales as a result of interaction with the environment provides necessary information about how animals acquire resources. (2) However, comparatively little is known about intra- and interindividual variation of condition in marine systems. Where condition has been studied, changes typically are recorded at relatively coarse time-scales. By quantifying how fine-scale interaction with the environment influences condition, we can broaden our understanding of how animals acquire resources and allocate them to body stores. (3) Here we used a hierarchical Bayesian state-space model to estimate the body condition as measured by the size of an animal's lipid store in two closely related species of marine predator that occupy different hemispheres: northern elephant seals (Mirounga angustirostris) and southern elephant seals (Mirounga leonina). The observation model linked drift dives to lipid stores. The process model quantified daily changes in lipid stores as a function of the physiological condition of the seal (lipid:lean tissue ratio, departure lipid and departure mass), its foraging location, two measures of behaviour and environmental covariates. (4) We found that physiological condition significantly impacted lipid gain at two time-scales – daily and at departure from the colony – that foraging location was significantly associated with lipid gain in both species of elephant seals and that long-term behavioural phase was associated with positive lipid gain in northern and southern elephant seals. In northern elephant seals, the occurrence of short-term behavioural states assumed to represent foraging were correlated with lipid gain. Lipid gain was a function of covariates in both species. Southern elephant seals performed ... Article in Journal/Newspaper Elephant Seals Macquarie Island Mirounga leonina Southern Elephant Seals University of St Andrews: Digital Research Repository Journal of Animal Ecology 82 6 1300 1315 |