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Mortality rates of epipelagic copepods in the post-spring bloom period in Disko Bay, western Greenland
Univ Gothenburg, Dept Marine Ecol, Fiskebackskil 45034, Sweden..ORCID iD: 0000-0002-2603-2284
Natl Environm Res Inst, Dept Marine Ecol, DK-4000 Roskilde, Denmark..
Univ Gothenburg, Dept Marine Ecol, Fiskebackskil 45034, Sweden..
Responsible organisation
2008 (English)In: Marine Ecology Progress Series, ISSN 0171-8630, E-ISSN 1616-1599, Vol. 359, 151-160 p.Article in journal (Refereed) Published
Abstract [en]

Mortality rates of the copepods Calanus hyperboreus, C. glacialis, C. finmarchicus, Pseudocalanus sp. and Oithona similis were investigated during June 2001 in Disko Bay, western Greenland. These 5 species dominated the zooplankton community in the upper 75 m, contributing 89 % of the total copepod biomass. Instantaneous mortality rates of copepodites of all 5 species and nauplii of Pseudocalanus sp. and O. similis were calculated using vertical life tables on abundances and published information on stage duration times. Compared with those covering a range of boreal habitats, the mortality rates were higher, with highest rates occurring in C. finmarchicus and C. glacialis copepodite stages I to III and Pseudocalanus spp. stage III (maximum = 0.18 d(-1)). Mortality rates remained lower in all stages of O. similis, When superimposing mortality rates for all species and stages on copepod size a significant peak at 1.3 mm prosome length was evident. This peak fitted a prey size dependent functional response of predation and the high mortality rates were, therefore, most probably attributable to size-specific predation.

Place, publisher, year, edition, pages
2008. Vol. 359, 151-160 p.
Keyword [en]
arctic copepods, mortality rates, Calanus, Pseudocalanus, Oithona
Research subject
SWEDARCTIC 2001, Grönland 2001
Identifiers
URN: urn:nbn:se:polar:diva-2349DOI: 10.3354/meps07376ISI: 000256338000012OAI: oai:DiVA.org:polar-2349DiVA: diva2:858584
Available from: 2015-10-02 Created: 2015-10-02 Last updated: 2015-10-02

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CiteExportLink to record
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