Seasonal patterns in the nocturnal distributionand behavior of the mesopelagic fish Maurolicus muelleri at high latitudes

Handle URI:
http://hdl.handle.net/10754/564063
Title:
Seasonal patterns in the nocturnal distributionand behavior of the mesopelagic fish Maurolicus muelleri at high latitudes
Authors:
Prihartato, Perdana ( 0000-0002-9393-5125 ) ; Aksnes, Dag L.; Kaartvedt, Stein ( 0000-0002-8793-2948 )
Abstract:
Acoustic scattering layers (SL) ascribed to pearlside Maurolicus muelleri were studied in Masfjorden, Norway, using upward-looking echo sounders cabled to shore for continuous long-term measurements. The acoustic studies were accompanied by continuous measurements of surface light and supplemented with intermittent field campaigns. From autumn to spring, young M. muelleri formed an SL in the upper ∼75 to 150 m in the daytime, characterized by migration to near-surface water near dusk, subsequent 'midnight sinking', followed by a dawn ascent before a return to the daytime habitat. Light levels were ∼1 order of magnitude lower during the dawn ascent than for ascent in the afternoon, with the latter terminating before fish reached upper layers on ∼1/3 of the nights from late November to mid-April. Adults showed less tendency of migration during autumn and winter, until the SLs of young and adults merged in late spring, and thereafter displayed coherent migration behavior. The midnight sinking became progressively deeper from autumn to winter but was strongly reduced from mid-May when the darkest nocturnal light intensity (PAR) at the surface was above 10-3 μmol m-2 s-1. The pearlside took on schooling in upper waters during the even lighter nights in early June, with minimum light of ∼5 × 10-3 to 10-1 μmol m-2 s-1 at the surface. Nocturnal schooling ceased in early July, and midnight sinking reappeared in mid-August. We suggest that the strong variation in nocturnal light intensity at high latitudes provides changing trade-offs between visual foraging and avoiding predators and hence varying time budgets for feeding in the upper, productive layers.
KAUST Department:
Red Sea Research Center (RSRC); Biological and Environmental Sciences and Engineering (BESE) Division
Publisher:
Inter-Research Science Center
Journal:
Marine Ecology Progress Series
Issue Date:
17-Feb-2015
DOI:
10.3354/meps11139
Type:
Article
ISSN:
01718630
Sponsors:
We thank Thor A. Klevjer and Anders Rostad for invaluable help during the acoustic studies. This study was funded by King Abdullah University of Science and Technology.
Appears in Collections:
Articles; Red Sea Research Center (RSRC); Biological and Environmental Sciences and Engineering (BESE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorPrihartato, Perdanaen
dc.contributor.authorAksnes, Dag L.en
dc.contributor.authorKaartvedt, Steinen
dc.date.accessioned2015-08-03T12:30:26Zen
dc.date.available2015-08-03T12:30:26Zen
dc.date.issued2015-02-17en
dc.identifier.issn01718630en
dc.identifier.doi10.3354/meps11139en
dc.identifier.urihttp://hdl.handle.net/10754/564063en
dc.description.abstractAcoustic scattering layers (SL) ascribed to pearlside Maurolicus muelleri were studied in Masfjorden, Norway, using upward-looking echo sounders cabled to shore for continuous long-term measurements. The acoustic studies were accompanied by continuous measurements of surface light and supplemented with intermittent field campaigns. From autumn to spring, young M. muelleri formed an SL in the upper ∼75 to 150 m in the daytime, characterized by migration to near-surface water near dusk, subsequent 'midnight sinking', followed by a dawn ascent before a return to the daytime habitat. Light levels were ∼1 order of magnitude lower during the dawn ascent than for ascent in the afternoon, with the latter terminating before fish reached upper layers on ∼1/3 of the nights from late November to mid-April. Adults showed less tendency of migration during autumn and winter, until the SLs of young and adults merged in late spring, and thereafter displayed coherent migration behavior. The midnight sinking became progressively deeper from autumn to winter but was strongly reduced from mid-May when the darkest nocturnal light intensity (PAR) at the surface was above 10-3 μmol m-2 s-1. The pearlside took on schooling in upper waters during the even lighter nights in early June, with minimum light of ∼5 × 10-3 to 10-1 μmol m-2 s-1 at the surface. Nocturnal schooling ceased in early July, and midnight sinking reappeared in mid-August. We suggest that the strong variation in nocturnal light intensity at high latitudes provides changing trade-offs between visual foraging and avoiding predators and hence varying time budgets for feeding in the upper, productive layers.en
dc.description.sponsorshipWe thank Thor A. Klevjer and Anders Rostad for invaluable help during the acoustic studies. This study was funded by King Abdullah University of Science and Technology.en
dc.publisherInter-Research Science Centeren
dc.subjectAcousticsen
dc.subjectBehavioren
dc.subjectDiel vertical migrationen
dc.subjectLight levelsen
dc.subjectMesopelagicen
dc.titleSeasonal patterns in the nocturnal distributionand behavior of the mesopelagic fish Maurolicus muelleri at high latitudesen
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.contributor.institutionHjort Centre for Marine Ecosystem Dynamics, Department of Biology, University of Bergen, Norwayen
dc.contributor.institutionUniversity of Oslo, Department of Biosciences, PO Box 1066Blindern, Oslo, Norwayen
kaust.authorPrihartato, Perdanaen
kaust.authorKaartvedt, Steinen
All Items in KAUST are protected by copyright, with all rights reserved, unless otherwise indicated.