Polar Biology

, Volume 7, Issue 1, pp 43–50 | Cite as

Fluoride in tissues of Krill Euphausia superba Dana and Meganyctiphanes norvegica M. Sars in relation to the moult cycle

  • D. Adelung
  • F. Buchholz
  • B. Culik
  • A. Keck
Article

Summary

The fluoride content of whole animals and different tissues of the euphausiid species Euphausia superba and Meganyctiphanes norvegica was analyzed by two different and improved methods of isolation and determination. In contrast to other authors our findings show that the internal organs (muscle, hepatopancreas and hemolymph) contain less than 6 ppm d.w. fluoride this being the same order of magnitude as for vertebrates. The high concentrations reported by other authors must be mainly due to contamination of the soft tissue during storage (post-mortem migration of fluoride from shell) and/or contamination caused by minute fractions of cuticle during dissection. Over 99% of the total fluoride content is located in the cuticle (i.e. integument) of the euphausiids (2600 ppm/d.w. in E. superba and 3300 ppm/d.w. in M. norvegica in pleon cuticle). Analysis of F- levels in relation to the moulting cycle showed that the uptake in both euphausiids occurs at a comparable and fast rate during the same physiological phase shortly after moult, parallel to the general construction of the cuticle. The internal organs show homeostasis in respect to fluoride. Accordingly, no internal deposition takes place, and F- is reaccumulated from the external medium at each moult.

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Copyright information

© Springer-Verlag 1987

Authors and Affiliations

  • D. Adelung
    • 1
  • F. Buchholz
    • 1
  • B. Culik
    • 1
  • A. Keck
    • 1
  1. 1.Institut für MeereskundeUniversität Kiel, Abteilung MeereszoologieKiel 1Germany
  2. 2.The Norwegian Institute of Technology, Department of BiotechnologyThe University of TrondheimTrondheim-NTHNorway

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