Long-term acoustical observations of the mesopelagic fish Maurolicus muelleri reveal novel and varied vertical migration patterns

Handle URI:
http://hdl.handle.net/10754/555768
Title:
Long-term acoustical observations of the mesopelagic fish Maurolicus muelleri reveal novel and varied vertical migration patterns
Authors:
Staby, A; Røstad, Anders ( 0000-0002-2512-9033 ) ; Kaartvedt, Stein ( 0000-0002-8793-2948 )
Abstract:
We studied the temporal dynamics in the vertical distribution of Maurolicus muelleri scattering layers (SL) by examining continuous acoustic recordings over a 15 mo period in Masfjorden, Norway, complemented by intermittent sampling campaigns. The data revealed known patterns as normal diel vertical migration (DVM), midnight sinking between dusk and dawn, and periods without migrations, as well as novel behaviours consisting of early morning ascents, reverse diel vertical migrations, and interrupted ascents in the evening. During the first autumn of the study, adult fish modified their normal DVM behaviour by suspending their migration in the evening, yet ascending toward the surface in the later part of the night to reach upper layers during dawn. This behaviour was not observed during the second autumn of the study. By mid- to end of November (1st autumn), adult fish had suspended the nocturnal ascent entirely, and in the subsequent period until the end of January, a fraction of the population rather performed limited reverse migrations, slightly shifting their vertical distribution upwards during the first part of the day. From January to March 2008, fish interrupted their evening ascent at apparently random intervals and returned to deeper waters, instead of completing a full ascent to the surface. Our study underlines the value of long-term recordings, with the results suggesting that M. muelleri has the capability of changing its behaviour in response to ontogeny and internal state (satiation and hunger) as well as to external stimuli.
KAUST Department:
Red Sea Research Center (RSRC); Biological and Environmental Sciences and Engineering (BESE) Division
Citation:
Long-term acoustical observations of the mesopelagic fish Maurolicus muelleri reveal novel and varied vertical migration patterns 2011, 441:241 Marine Ecology Progress Series
Publisher:
Inter-Research Science Center
Journal:
Marine Ecology Progress Series
Issue Date:
15-Nov-2011
DOI:
10.3354/meps09363
Type:
Article
ISSN:
0171-8630; 1616-1599
Additional Links:
http://www.int-res.com/abstracts/meps/v441/p241-255/
Appears in Collections:
Articles; Red Sea Research Center (RSRC); Red Sea Research Center (RSRC); Biological and Environmental Sciences and Engineering (BESE) Division; Biological and Environmental Sciences and Engineering (BESE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorStaby, Aen
dc.contributor.authorRøstad, Andersen
dc.contributor.authorKaartvedt, Steinen
dc.date.accessioned2015-05-26T07:24:10Zen
dc.date.available2015-05-26T07:24:10Zen
dc.date.issued2011-11-15en
dc.identifier.citationLong-term acoustical observations of the mesopelagic fish Maurolicus muelleri reveal novel and varied vertical migration patterns 2011, 441:241 Marine Ecology Progress Seriesen
dc.identifier.issn0171-8630en
dc.identifier.issn1616-1599en
dc.identifier.doi10.3354/meps09363en
dc.identifier.urihttp://hdl.handle.net/10754/555768en
dc.description.abstractWe studied the temporal dynamics in the vertical distribution of Maurolicus muelleri scattering layers (SL) by examining continuous acoustic recordings over a 15 mo period in Masfjorden, Norway, complemented by intermittent sampling campaigns. The data revealed known patterns as normal diel vertical migration (DVM), midnight sinking between dusk and dawn, and periods without migrations, as well as novel behaviours consisting of early morning ascents, reverse diel vertical migrations, and interrupted ascents in the evening. During the first autumn of the study, adult fish modified their normal DVM behaviour by suspending their migration in the evening, yet ascending toward the surface in the later part of the night to reach upper layers during dawn. This behaviour was not observed during the second autumn of the study. By mid- to end of November (1st autumn), adult fish had suspended the nocturnal ascent entirely, and in the subsequent period until the end of January, a fraction of the population rather performed limited reverse migrations, slightly shifting their vertical distribution upwards during the first part of the day. From January to March 2008, fish interrupted their evening ascent at apparently random intervals and returned to deeper waters, instead of completing a full ascent to the surface. Our study underlines the value of long-term recordings, with the results suggesting that M. muelleri has the capability of changing its behaviour in response to ontogeny and internal state (satiation and hunger) as well as to external stimuli.en
dc.publisherInter-Research Science Centeren
dc.relation.urlhttp://www.int-res.com/abstracts/meps/v441/p241-255/en
dc.rightsArchived with thanks to Marine Ecology Progress Series © 2011 Inter-Researchen
dc.subjectDiel vertical migrationen
dc.subjectDVMen
dc.subjectScattering layersen
dc.subjectMaurolicus muellerien
dc.subjectOntogenyen
dc.subjectStationaryen
dc.titleLong-term acoustical observations of the mesopelagic fish Maurolicus muelleri reveal novel and varied vertical migration patternsen
dc.typeArticleen
dc.contributor.departmentRed Sea Research Center (RSRC)en
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.identifier.journalMarine Ecology Progress Seriesen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionUniversity of Bergen, Department of Biology, PO Box 7803, 5020 Bergen, Norwayen
dc.contributor.institutionUniversity of Oslo, Department of Biology, PO Box 1066 Blindern, 0316 Oslo, Norwayen
kaust.authorRøstad, Andersen
kaust.authorKaartvedt, Steinen
All Items in KAUST are protected by copyright, with all rights reserved, unless otherwise indicated.