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Some effects of ultraviolet radiation and climate on the reproduction of Calanus finmarchicus (Copepoda) and year class formation in Arcto-Norwegian cod (Gadus morhua)

Skreslet, Stig and Borja, Angel and Bugliaro, Luca and Hansen, Georg and Meerkötter, Ralf and Olsen, Ketil and Verdebout, Jean (2005) Some effects of ultraviolet radiation and climate on the reproduction of Calanus finmarchicus (Copepoda) and year class formation in Arcto-Norwegian cod (Gadus morhua). ICES Journal of Marine Science, 62, pp. 1293-1300. DOI: 10.1016/j.icesjms.2005.05.019.

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Abstract

Zooplankton sampling in 1997 identified the frontal zone of the Norwegian Coastal Current as a reproduction habitat for Calanus finmarchicus in June-August. This area is subject to considerable ultraviolet radiation (UVR), as calculated from satellite observations of ozone and cloudiness. While in situ experiments indicated UVR-induced mortality in reproducing C. finmarchicus, monthly UVR doses during the actual reproduction period did not appear to affect the abundance of the resulting generation of adolescent copepodites (CIV-V) that accumulated in a fjord habitat during October 1983-2000. Local UVR in the spawning grounds of Arcto-Norwegian cod at the Lofoten Islands in March-May was positively correlated with the stock's 0-group index, which resulted in the rejection of the hypothesis that local UVR leads to high mortality of cod eggs or reduces the abundance of prey for cod larvae. Rather, the result suggests an indirect positive effect of UVR on the survival of cod eggs and larvae, possibly by controlling harmful microbes.

Document Type:Article
Title:Some effects of ultraviolet radiation and climate on the reproduction of Calanus finmarchicus (Copepoda) and year class formation in Arcto-Norwegian cod (Gadus morhua)
Authors:
AuthorsInstitution or Email of Authors
Skreslet, StigBodø Regional Univ., Bodø, N
Borja, AngelAZTI, Pasaia, E
Bugliaro, LucaUNSPECIFIED
Hansen, GeorgNILU, Tromsø, N
Meerkötter, RalfUNSPECIFIED
Olsen, KetilBodø Regional Univ., N
Verdebout, JeanEC-JRC, Ispra, I
Date:2005
Journal or Publication Title:ICES Journal of Marine Science
Volume:62
DOI:10.1016/j.icesjms.2005.05.019
Page Range:pp. 1293-1300
Status:Published
Keywords:bacteria, climate, freshwater, Norwegian Coastal Current, radiation, recruitment, trophodynamics, UV
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):W - Vorhaben Atmosphären- und Klimaforschung (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Atmospheric Remote Sensing
Deposited By: Dr.rer.nat. Luca Bugliaro Goggia
Deposited On:19 Mar 2008
Last Modified:12 Dec 2013 20:08

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