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Presumptive Viral Erythrocytic Necrosis in the Benthopelagic Fish Coryphaenoides (Nematonurus) Armatus from the Abyss West Of Portugal

Published online by Cambridge University Press:  11 May 2009

A.J. Davies
Kingston University, School of Life Sciences, Kingston, Surrey, KT1 2EE.
N.R. Merrett
Department of Zoology, The Natural History Museum, Cromwell Road, London, SW7 5BD


Presumptive viral erythrocytic necrosis (VEN) was recorded from 1/4 of the benthopelagic fish Coryphaenoides (Nematonurus) armatus (Teleostei: Macrouridae) trawled from the abyss west of Portugal. In a blood smear made from the caudal vein of this fish, 8·6% of erythrocytes contained 1–2 intracytoplasmic inclusions which were invariably round and 1·13 ±0·43 μm in diameter. An eosinophilic granular area accompanied many inclusions. In comparison with erythrocytes from uninfected specimens of C. (N.) armatus, most of those from the infected fish were larger. Erythrocytes with suspected VEN exhibited either normal staining, or were pale, with swollen or crenated nuclei which were often displaced to the cell periphery. Erythrocyte ghosts, with and without inclusions and granules, were present in the same infected fish, suggesting osmotic damage to red cells resulting from the infection. None of 13 other C. (N.) armatus and 27 fish examined from collections made south of Maderia, representing another 20 species of benthic, benthopelagic and mid-water fish, had detectable infections.

Short Communications
Copyright © Marine Biological Association of the United Kingdom 1998

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Eiras, J.C., 1984. Virus infection of marine fish: prevalence of viral erythrocytic necrosis (VEN) in Mugil cephalus L., Blennius pholis L. and Platichthys flesus L. in coastal waters of Portugal. Bulletin of the European Association of Fish Pathologists, 4, 5256.Google Scholar
Eiras, J.C., Costa, G., Biscoito, M. & Davies, A.J., 1996. Suspected viral erythrocytic necrosis (VEN) in the intertidal fish Mauligobius maderensis from Madeira, Portugal. Journal of the Marine Biological Association of the United Kingdom, 76, 545548.CrossRefGoogle Scholar
Eiras, J.C. & Santos, P.J., 1992. Presumptive viral erythrocytic necrosis (VEN) in fishes off the Portuguese coast. Bulletin of the European Association of Fish Pathologists, 12, 4547.Google Scholar
Khan, R.A., Threlfall, W. & Whitty, W.S., 1992. Hematozoa of deep-sea demersal fish of the northwest Atlantic Ocean. Canadian Journal of Zoology, 70, 19261933.CrossRefGoogle Scholar
Pinto, R.M., Alvarez-Pellitero, P., Bosch, A. & Jofre, J., 1989. Occurrence of a viral erythrocytic infection in the Mediterranean sea bass, Dicentrarchus labrax (L.). Journal of Fish Diseases, 12, 185191.CrossRefGoogle Scholar
Smail, D.A. & Munro, A.L.S., 1989. The virology of teleosts. In Fish pathology, 2nd ed. (ed. R.J., Roberts), pp. 173241. London: Bailliere Tindall.Google Scholar