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Changes in fish and benthos catches off the Danish coast in September 1981

Published online by Cambridge University Press:  06 October 2009

M. F. Dyer
Affiliation:
Marine Benthos Laboratory, Luton College of Higher Education, Putteridge Bury, Luton, Beds., LU2 8LE
J. G. Pope
Affiliation:
Ministry of Agriculture, Fisheries and Food, Directorate of Fisheries Research, Fisheries Laboratory, Lowestoft, Suffolk, NR33 oHT
P. D. Fry
Affiliation:
Marine Benthos Laboratory, Luton College of Higher Education, Putteridge Bury, Luton, Beds., LU2 8LE
R. J. Law
Affiliation:
Ministry of Agriculture, Fisheries and Food, Directorate of Fisheries Research, Fisheries Laboratory, Burnham-on-Crouch, Essex, CMo 8HA
J. E. Portmann
Affiliation:
Ministry of Agriculture, Fisheries and Food, Directorate of Fisheries Research, Fisheries Laboratory, Burnham-on-Crouch, Essex, CMo 8HA

Abstract

During a routine North Sea demersal fish survey, very low fish catches were recorded at two primary stations off the Danish coast in September 1981. The catch of benthos at thesestations was much greater than the previous year, and underwater photographs from a headline camera revealed that this was a result of most infaunal species having emerged from beneath the sand. The phenomenon was assumed to be caused by low oxygen concentrations in bottom water following the collapse of a bloom of the dinoflagellate Ceratium furca.

Type
Research Article
Copyright
Copyright © Marine Biological Association of the United Kingdom 1983

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