Vertical distribution, feeding and vulnerability to tactile predation in Metridia longa (Copepoda, Calanoida)

Handle URI:
http://hdl.handle.net/10754/563112
Title:
Vertical distribution, feeding and vulnerability to tactile predation in Metridia longa (Copepoda, Calanoida)
Authors:
Vestheim, Hege; Brucet, Sandra; Kaartvedt, Stein ( 0000-0002-8793-2948 )
Abstract:
We assessed the vertical distribution and feeding of the calanoid copepod Metridia longa in the Oslofjord, Norway during winter and spring 2006. Adult females of Metridia longa inhabited the whole 200 m deep-water column. Their distribution was shallower at night than during the day. Enumeration of egested faecal pellets suggested that feeding activity was greater at night than during the day and that more pellets were produced by individuals collected at shallow depths vs. by individuals found deeper. There was no pronounced difference between months in feeding activity. Although the hypothesis is that they prey on Calanus eggs and nauplii, scanning of Metridia faecal pellets by PCR using Calanus-specific primers did not confirm the presence of any Calanus prey DNA. Most pellets had a greenish colour, implying herbivorous feeding. Feeding is related to swimming, and the actively swimming Metridia would presumably be vulnerable to tactile invertebrate predators. However, predation experiments where the carnivorous copepod Pareuchaeta norvegica was offered similar-sized Metridia and Calanus proved that Pareuchaeta consumed the less-active Calanus, but not the Metridia. © 2013 Copyright Taylor and Francis Group, LLC.
KAUST Department:
Red Sea Research Center (RSRC); Biological and Environmental Sciences and Engineering (BESE) Division
Publisher:
Informa UK Limited
Journal:
Marine Biology Research
Issue Date:
Dec-2013
DOI:
10.1080/17451000.2013.793806
Type:
Article
ISSN:
17451000
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.authorVestheim, Hegeen
dc.contributor.authorBrucet, Sandraen
dc.contributor.authorKaartvedt, Steinen
dc.date.accessioned2015-08-03T11:36:03Zen
dc.date.available2015-08-03T11:36:03Zen
dc.date.issued2013-12en
dc.identifier.issn17451000en
dc.identifier.doi10.1080/17451000.2013.793806en
dc.identifier.urihttp://hdl.handle.net/10754/563112en
dc.description.abstractWe assessed the vertical distribution and feeding of the calanoid copepod Metridia longa in the Oslofjord, Norway during winter and spring 2006. Adult females of Metridia longa inhabited the whole 200 m deep-water column. Their distribution was shallower at night than during the day. Enumeration of egested faecal pellets suggested that feeding activity was greater at night than during the day and that more pellets were produced by individuals collected at shallow depths vs. by individuals found deeper. There was no pronounced difference between months in feeding activity. Although the hypothesis is that they prey on Calanus eggs and nauplii, scanning of Metridia faecal pellets by PCR using Calanus-specific primers did not confirm the presence of any Calanus prey DNA. Most pellets had a greenish colour, implying herbivorous feeding. Feeding is related to swimming, and the actively swimming Metridia would presumably be vulnerable to tactile invertebrate predators. However, predation experiments where the carnivorous copepod Pareuchaeta norvegica was offered similar-sized Metridia and Calanus proved that Pareuchaeta consumed the less-active Calanus, but not the Metridia. © 2013 Copyright Taylor and Francis Group, LLC.en
dc.publisherInforma UK Limiteden
dc.subjectCopepodsen
dc.subjectDVMen
dc.subjectMetridiaen
dc.subjectOslofjorden
dc.subjectPareuchaetaen
dc.subjectzooplanktonen
dc.titleVertical distribution, feeding and vulnerability to tactile predation in Metridia longa (Copepoda, Calanoida)en
dc.typeArticleen
dc.contributor.departmentRed Sea Research Center (RSRC)en
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.identifier.journalMarine Biology Researchen
dc.contributor.institutionDepartment of Biology, University of Oslo, Oslo, Norwayen
dc.contributor.institutionDepartment of Environmental Sciences and Food, University of Vic, Spainen
kaust.authorVestheim, Hegeen
kaust.authorKaartvedt, Steinen
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