Journal article 591 views
High activity and Levy searches: jellyfish can search the water column like fish
G. C Hays,
T Bastian,
T. K Doyle,
S Fossette,
A. C Gleiss,
M. B Gravenor,
V. J Hobson,
N. E Humphries,
M. K. S Lilley,
N. G Pade,
D. W Sims,
Michael Gravenor ,
Victoria Hobson
Proceedings of the Royal Society B: Biological Sciences
Swansea University Authors: Michael Gravenor , Victoria Hobson
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DOI (Published version): 10.1098/rspb.2011.0978
Abstract
Over-fishing may lead to a decrease in fish abundance and a proliferation of jellyfish. Active movements and prey search might be thought to provide a competitive advantage for fish, but here we use data-loggers to show that the frequently occurring coastal jellyfish (Rhizostoma octopus) does not si...
Published in: | Proceedings of the Royal Society B: Biological Sciences |
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ISSN: | 0962-8452 1471-2954 |
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2011
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URI: | https://cronfa.swan.ac.uk/Record/cronfa6132 |
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2011-10-01T00:00:00.0000000 v2 6132 2011-10-01 High activity and Levy searches: jellyfish can search the water column like fish 70a544476ce62ba78502ce463c2500d6 0000-0003-0710-0947 Michael Gravenor Michael Gravenor true false 9024f9f0a80d2d248c7c6efb2e715c37 Victoria Hobson Victoria Hobson true false 2011-10-01 HDAT Over-fishing may lead to a decrease in fish abundance and a proliferation of jellyfish. Active movements and prey search might be thought to provide a competitive advantage for fish, but here we use data-loggers to show that the frequently occurring coastal jellyfish (Rhizostoma octopus) does not simply passively drift to encounter prey. Jellyfish (327 days of data from 25 jellyfish with depth collected every 1 min) showed very dynamic vertical movements, with their integrated vertical movement averaging 619.2 m up, more than 60 times the water depth where they were tagged. The majority of movement patterns were best approximated by exponential models describing normal random walks. However, jellyfish also showed switching behaviour from exponential patterns to patterns best fitted by a truncated Lévy distribution with exponents (mean= 1.96, range 1.2-2.9) close to the theoretical optimum for searching for sparse prey (mu= 2.0). Complex movements in these simple animals may help jellyfish to compete effectively with fish for plankton prey, which may enhance their ability to increase in dominance in perturbed ocean systems. Journal Article Proceedings of the Royal Society B: Biological Sciences 0962-8452 1471-2954 31 12 2011 2011-12-31 10.1098/rspb.2011.0978 COLLEGE NANME Health Data Science COLLEGE CODE HDAT Swansea University 2011-10-01T00:00:00.0000000 2011-10-01T00:00:00.0000000 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Biosciences G. C Hays 1 T Bastian 2 T. K Doyle 3 S Fossette 4 A. C Gleiss 5 M. B Gravenor 6 V. J Hobson 7 N. E Humphries 8 M. K. S Lilley 9 N. G Pade 10 D. W Sims 11 Michael Gravenor 0000-0003-0710-0947 12 Victoria Hobson 13 |
title |
High activity and Levy searches: jellyfish can search the water column like fish |
spellingShingle |
High activity and Levy searches: jellyfish can search the water column like fish Michael Gravenor Victoria Hobson |
title_short |
High activity and Levy searches: jellyfish can search the water column like fish |
title_full |
High activity and Levy searches: jellyfish can search the water column like fish |
title_fullStr |
High activity and Levy searches: jellyfish can search the water column like fish |
title_full_unstemmed |
High activity and Levy searches: jellyfish can search the water column like fish |
title_sort |
High activity and Levy searches: jellyfish can search the water column like fish |
author_id_str_mv |
70a544476ce62ba78502ce463c2500d6 9024f9f0a80d2d248c7c6efb2e715c37 |
author_id_fullname_str_mv |
70a544476ce62ba78502ce463c2500d6_***_Michael Gravenor 9024f9f0a80d2d248c7c6efb2e715c37_***_Victoria Hobson |
author |
Michael Gravenor Victoria Hobson |
author2 |
G. C Hays T Bastian T. K Doyle S Fossette A. C Gleiss M. B Gravenor V. J Hobson N. E Humphries M. K. S Lilley N. G Pade D. W Sims Michael Gravenor Victoria Hobson |
format |
Journal article |
container_title |
Proceedings of the Royal Society B: Biological Sciences |
publishDate |
2011 |
institution |
Swansea University |
issn |
0962-8452 1471-2954 |
doi_str_mv |
10.1098/rspb.2011.0978 |
college_str |
Faculty of Science and Engineering |
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facultyofscienceandengineering |
hierarchy_top_title |
Faculty of Science and Engineering |
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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 |
document_store_str |
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description |
Over-fishing may lead to a decrease in fish abundance and a proliferation of jellyfish. Active movements and prey search might be thought to provide a competitive advantage for fish, but here we use data-loggers to show that the frequently occurring coastal jellyfish (Rhizostoma octopus) does not simply passively drift to encounter prey. Jellyfish (327 days of data from 25 jellyfish with depth collected every 1 min) showed very dynamic vertical movements, with their integrated vertical movement averaging 619.2 m up, more than 60 times the water depth where they were tagged. The majority of movement patterns were best approximated by exponential models describing normal random walks. However, jellyfish also showed switching behaviour from exponential patterns to patterns best fitted by a truncated Lévy distribution with exponents (mean= 1.96, range 1.2-2.9) close to the theoretical optimum for searching for sparse prey (mu= 2.0). Complex movements in these simple animals may help jellyfish to compete effectively with fish for plankton prey, which may enhance their ability to increase in dominance in perturbed ocean systems. |
published_date |
2011-12-31T03:07:34Z |
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1763749768332312576 |
score |
11.016258 |