publication . Article . 1997

An Ichthyophonus hoferi epizootic in herring in the North Sea, the Skagerrak, the Kattegat and the Baltic Sea

Bettina Spanggaard; Stig Mellergaard;
Open Access English
  • Published: 01 Jan 1997
  • Country: Denmark
Abstract
An epizootic caused by the internal parasite Ichthyophonus hoferi in herring Clupea harengus was recorded from 1991 to 1993 in the waters around Denmark. A surveillance programme from research vessels and commercial fishing boats was conducted in the North Sea, Skagerrak, Kattegat and Baltic Sea. A total of 15769 hearts of adult herring were examined macroscopically for evidence of infection. The prevalence of the infection in this period decreased from 10.6 to 2.0% in the North Sea, from 8.0 to 5.6% in the Skagerrak, from 12.0 to 1.1% in the Kattegat and from 4.5 to 0.4% in the Baltic Sea. Prevalence rates in research vessel catches were significantly higher (b...
Subjects
free text keywords: Fiskesundhed, Herring, Fishery, Ichthyophonus, biology.organism_classification, biology, Aquatic animal, Clupeidae, Baltic sea, Epizootic, medicine.disease, medicine, Ichthyophonus hoferi, North sea
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