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Vertical distribution, and seasonal diurnal migration of Calanus helgolandicus in the Celtic Sea
Williams, J.; Conway, D.V.P. (1984). Vertical distribution, and seasonal diurnal migration of Calanus helgolandicus in the Celtic Sea. Mar. Biol. (Berl.) 79: 63-73
In: Marine Biology. Springer: Heidelberg; Berlin. ISSN 0025-3162, more
Peer reviewed article  

Available in  Authors 

Keywords
    Calanus helgolandicus (Claus, 1863) [WoRMS]; Marine

Authors  Top 
  • Williams, J.
  • Conway, D.V.P.

Abstract
    The vertical distribution and migration (seasonal, diel and ontogenetic) of C. Helgolandicus are described from the shallow (100 m) shelf-seas to the south-west of the British Isles. Large vertical migrations were observed in the younger copepodites (CI and II), the CI and CII stages behaved differently and were located above the thermocline within the euphotic zone. The largest vertical displacements of biomass were seen in the summer months due to the migrations of the CV stages and adults, which had developed from the spring cohorts. It was contended that the seasonal ad vertical migrations of C. Helgolandicus are part of a complex pattern of inherent behavior.

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