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Northern krill, Meganyctiphanes norvegica, come up to see the last eclipse of the millennium?

Published online by Cambridge University Press:  09 October 2002

J.-O. Strömberg ,
J.I. Spicer ,
B. Liljebladh  and
M.A. Thomasson
J.-O. Strömberg
Affiliation:
Kristineberg Marine Research Station, Kristineberg 2130, SE-450 34 Fiskebäckskil, Sweden
J.I. Spicer
Affiliation:
School of Biological Sciences, University of Plymouth, Plymouth, PL4 8AA, UK
B. Liljebladh
Affiliation:
Department of Earth Sciences, Physical Oceanography, University of Göteborg, PO Box 460, SE-405 30, Göteborg, Sweden
M.A. Thomasson
Affiliation:
Kristineberg Marine Research Station, Kristineberg 2130, SE-450 34 Fiskebäckskil, Sweden
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Abstract

Most krill species undergo diel vertical migration (DVM) which is to some extent influenced by light intensity. During a solar eclipse (11 August 1999) the upward and downward movement of krill, Meganyctiphanes norvegica, inhabiting a Swedish fjord followed closely changes in light intensity. Here the eclipse was partial (77%) and the weather overcast and yet krill at 70–90 m depth were able to detect, and respond to very small changes in light. This observation of an event during mid-day which is not pre-programmed confirms light as an important triggering mechanism for krill DVM.

Type
Short Communication
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 82 , Issue 5 , October 2002 , pp. 919 - 920
Copyright
2002 Marine Biological Association of the United Kingdom

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