Lévy night flights by the jellyfish Periphylla periphylla

Handle URI:
http://hdl.handle.net/10754/555653
Title:
Lévy night flights by the jellyfish Periphylla periphylla
Authors:
Ugland, KI; Aksnes, DL; Klevjer, TA; Titelman, J; Kaartvedt, Stein ( 0000-0002-8793-2948 )
Abstract:
Jellyfish blooms occur in marine environments around the world and have been linked to over-fishing, eutrophication and climatic change. In some coastal areas of Norway, the circumglobal Periphylla periphylla has increased to exceptionally high abundances and has replaced fish as the main planktivorous predator despite the ineffectiveness of its non-visual predation compared to visual fish predation. Using data from a bottom-mounted acoustic platform, we collected 12341 in situ measurements of individual vertical movements of large individuals of P. periphylla. These jellyfish are characterized by a stepwise vertical movement. The distribution of their vertical swimming distances was extremely left skewed; about 85% of the swimming distances were less than 3 m, and a few displacements were extremely long with a maximum of 85 m. Chi-square tests of goodness of fit to the tail and Akaike’s information criterion gave overwhelming evidence of the truncated power law. There was a clear diel pattern in the exponent with values significantly larger than 3 during the daytime and significantly lower than 3 at night. This pattern means that P. periphylla switches from relatively limited movements during the day to Lévy-like flights during the night. Since the abundance of zooplankton is large in the P. periphylla fjord, Brownian motion, rather than Lévy flight, is predicted by the optimal foraging hypothesis. It is therefore possible that the Lévy-like search pattern has evolved in the food-scarce oceanic environment, which is the main natural habitat of P. periphylla. Alternatively, the large individuals of the population addressed here may forage on scarcer prey sources than the main prevailing zooplankton in Lurefjorden.
KAUST Department:
Biological and Environmental Sciences and Engineering (BESE) Division
Citation:
Lévy night flights by the jellyfish Periphylla periphylla 2014, 513:121 Marine Ecology Progress Series
Publisher:
Inter-Research Science Center
Journal:
Marine Ecology Progress Series
Issue Date:
22-Oct-2014
DOI:
10.3354/meps10942
Type:
Article
ISSN:
0171-8630; 1616-1599
Additional Links:
http://www.int-res.com/abstracts/meps/v513/p121-130/
Appears in Collections:
Articles; Biological and Environmental Sciences and Engineering (BESE) Division; Biological and Environmental Sciences and Engineering (BESE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorUgland, KIen
dc.contributor.authorAksnes, DLen
dc.contributor.authorKlevjer, TAen
dc.contributor.authorTitelman, Jen
dc.contributor.authorKaartvedt, Steinen
dc.date.accessioned2015-05-25T08:37:16Zen
dc.date.available2015-05-25T08:37:16Zen
dc.date.issued2014-10-22en
dc.identifier.citationLévy night flights by the jellyfish Periphylla periphylla 2014, 513:121 Marine Ecology Progress Seriesen
dc.identifier.issn0171-8630en
dc.identifier.issn1616-1599en
dc.identifier.doi10.3354/meps10942en
dc.identifier.urihttp://hdl.handle.net/10754/555653en
dc.description.abstractJellyfish blooms occur in marine environments around the world and have been linked to over-fishing, eutrophication and climatic change. In some coastal areas of Norway, the circumglobal Periphylla periphylla has increased to exceptionally high abundances and has replaced fish as the main planktivorous predator despite the ineffectiveness of its non-visual predation compared to visual fish predation. Using data from a bottom-mounted acoustic platform, we collected 12341 in situ measurements of individual vertical movements of large individuals of P. periphylla. These jellyfish are characterized by a stepwise vertical movement. The distribution of their vertical swimming distances was extremely left skewed; about 85% of the swimming distances were less than 3 m, and a few displacements were extremely long with a maximum of 85 m. Chi-square tests of goodness of fit to the tail and Akaike’s information criterion gave overwhelming evidence of the truncated power law. There was a clear diel pattern in the exponent with values significantly larger than 3 during the daytime and significantly lower than 3 at night. This pattern means that P. periphylla switches from relatively limited movements during the day to Lévy-like flights during the night. Since the abundance of zooplankton is large in the P. periphylla fjord, Brownian motion, rather than Lévy flight, is predicted by the optimal foraging hypothesis. It is therefore possible that the Lévy-like search pattern has evolved in the food-scarce oceanic environment, which is the main natural habitat of P. periphylla. Alternatively, the large individuals of the population addressed here may forage on scarcer prey sources than the main prevailing zooplankton in Lurefjorden.en
dc.publisherInter-Research Science Centeren
dc.relation.urlhttp://www.int-res.com/abstracts/meps/v513/p121-130/en
dc.rightsArchived with thanks to Marine Ecology Progress Seriesen
dc.subjectJellyfishen
dc.subjectSwimming patternsen
dc.subjectDiel cycleen
dc.subjectTruncated power lawen
dc.subjectLévy flighten
dc.subjectAcousticsen
dc.titleLévy night flights by the jellyfish Periphylla periphyllaen
dc.typeArticleen
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.identifier.journalMarine Ecology Progress Seriesen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionDepartment of Biosciences, University of Oslo, Pb. 1066 Blindern, 0316 Oslo, Norwayen
dc.contributor.institutionDepartment of Biology, University of Bergen, 5020 Bergen, Norwayen
dc.contributor.institutionInstitute of Marine Research, PO Box 1870 Nordnes, 5817 Bergen, Norwayen
kaust.authorKaartvedt, Steinen
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