Moult and Growth in Euphausiids

  • F. Buchholz

Summary

Laboratory experiments showed that growth rates in adolescent Antarctic Krill, Euphausia superba, were similar to calculated hypothetical values. Body shrinkage occurred in starved animals, but apparently was induced by laboratory effects. Reduction in body length during winter is not common to euphausiids; it was not found to occur in Meganyctiphanes norvegica (Euphausiacea) which continues to moult in winter. Euphausiid growth can be monitored by moult-staging, as tank experiments and field investigations have shown. Simultaneous moulting is a feature of E. superba in swarms, which can be observed either directly in the field or derived from the species’ pattern of moult stages.

Keywords

Biomass Migration Phytoplankton Shrinkage Coherence 

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Copyright information

© Springer-Verlag Berlin Heidelberg 1985

Authors and Affiliations

  • F. Buchholz
    • 1
  1. 1.Institut für MeereskundeUniversität KielKielGermany

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