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The physiological response of Northern Krill (Meganyctiphanes norvegica) to temperature gradients in the Kattegat
Saborowski, R.; Salomon, M.; Buchholz, F. (2000). The physiological response of Northern Krill (Meganyctiphanes norvegica) to temperature gradients in the Kattegat. Hydrobiologia 426: 157-160. https://dx.doi.org/10.1023/A:1003974613473
In: Hydrobiologia. Springer: The Hague. ISSN 0018-8158; e-ISSN 1573-5117, more
Related to:
Saborowski, R.; Salomon, M.; Buchholz, F. (2000). The physiological response of Northern Krill (Meganyctiphanes norvegica) to temperature gradients in the Kattegat, in: Liebezeit, G. et al. Life at Interfaces and Under Extreme Conditions: Proceedings of the 33rd European Marine Biology Symposium, Wilhelmshaven, Germany, 7-11 September 1998. Developments in Hydrobiology, 151: pp. 157-160. https://dx.doi.org/10.1007/978-94-011-4148-2_14, more
Peer reviewed article  
Available in  Authors 
Keywords
    Behaviour > Migrations > Vertical migrations
    Temperature gradients
    Meganyctiphanes norvegica (M. Sars, 1857) [WoRMS]
    ANE, Kattegat [Marine Regions]
    Marine/Coastal
Authors  Top 
  • Saborowski, R.
  • Salomon, M.
  • Buchholz, F., more
Abstract
    The Alkor-Deep (140 m), which forms part of a depression system in the northern Kattegat channel east of the island of Laeso (Denmark), is the location of a self sustaining population of Northern krill, Meganyctiphanes norvegica (Euphausiacea). This population is exposed to one of the most pronounced thermal gradients within the distributional range of this pelagic crustacean. During summer, the temperature of the water column ranges between 4 and 6 in the deep to 16 °C near the surface which results in the krill being exposed to temperature differences of 8-10 °C during diel vertical migration. Oxygen consumption rates were used to investigate the physiological adaptation of the animal to such gradients in temperature. The rates were found to increase exponentially from 31 µmol O2 h-1 g(dw)-1 at 4 °C to 72 µmol O2 h-1 g(dw)-1 at 16 °C, giving a Q10value of 2.0, and indicating that physiological adaptation to varying thermal conditions does not take place. Behavioural adaptations are discussed which may help the krill to cope with large temperature gradients in their environment.
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