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Doliolids in the German bight in 1989: Evidence for exceptional inflow into the North Sea

Published online by Cambridge University Press:  11 May 2009

J.A. Lindley ,
J. Roskell ,
A.J. Warner ,
N.C. Halliday ,
H.G. Hunt ,
A.W.G. John  and
T.D. Jonas
J.A. Lindley
Affiliation:
Plymouth Marine Laboratory, Prospect Place, The Hoe, Plymouth, PL1 3DH
J. Roskell
Affiliation:
Plymouth Marine Laboratory, Prospect Place, The Hoe, Plymouth, PL1 3DH
A.J. Warner
Affiliation:
Plymouth Marine Laboratory, Prospect Place, The Hoe, Plymouth, PL1 3DH
N.C. Halliday
Affiliation:
Plymouth Marine Laboratory, Prospect Place, The Hoe, Plymouth, PL1 3DH
H.G. Hunt
Affiliation:
Plymouth Marine Laboratory, Prospect Place, The Hoe, Plymouth, PL1 3DH
A.W.G. John
Affiliation:
Plymouth Marine Laboratory, Prospect Place, The Hoe, Plymouth, PL1 3DH
T.D. Jonas
Affiliation:
Plymouth Marine Laboratory, Prospect Place, The Hoe, Plymouth, PL1 3DH
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Extract

Doliolids were found in samples taken with a Continuous Plankton Recorder (CPR) in October 1989 between 55°14'N 03°32'E and 55°20'N 06°13'E during a tow between Newcastle and Esbjerg. Densities were estimated at >100 m−3 for about 112 km of tow. A sub-sample of specimens in sufficiently good condition to be reliably identified were referred to Doliolum nationalis Borgert. Substantial numbers of doliolids were found on a CPR tow between Harwich and Gothenburg which passed through the same area in that month and specimens were found nearer to the Danish coast in November and south-west of Helgoland in December. The distribution of doliolids in CPR samples taken in the North Sea in the last three months of 1989 is shown in Figure 1.

Type
Short Communications
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 70 , Issue 3 , August 1990 , pp. 679 - 682
Copyright
Copyright © Marine Biological Association of the United Kingdom 1990

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