Absence of infectious haematopoietic necrosis virus (IHNV) in New Zealand sockeye salmon, Oncorhynchus nerka

N. C. Boustead Freshwater Division, National Institute of Water and Atmospheric Research Ltd, P. O. Box 8602, Christchurch, New Zealand

T. R. Meyers Alaska Department of Fish and Game, Division of Fisheries Rehabilitation, Enhancement and Development, P. O. Box 25526, Juneau, Alaska, 99802–5526, USA

S. Short Alaska Department of Fish and Game, Division of Fisheries Rehabilitation, Enhancement and Development, P. O. Box 25526, Juneau, Alaska, 99802–5526, USA

Abstract

A study was undertaken of wild and hatchery stocks of freshwater resident sockeye salmon for infectious haematopoietic necrosis virus (IHNV) in New Zealand. From 1988 to 1991, 306 fish were sampled at egg collection from a broodstock reared entirely in captivity. Kidney and some ovarian fluids from 89 wild fish (kokanee) were removed and frozen at ‐70°C after they spawned in the Waitaki River catchment. Material from the samples was inoculated into tissue culture cell lines of Epithelioma papulosum cyprini (EPC) and chinook salmon embryo (CHSE‐214) cells. No IHNV was detected in any of the samples, suggesting that sockeye salmon stocks in New Zealand are free of detectable IHNV.

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Absence of infectious haematopoietic necrosis virus (IHNV) in New Zealand sockeye salmon, Oncorhynchus nerka

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Absence of infectious haematopoietic necrosis virus (IHNV) in New Zealand sockeye salmon, Oncorhynchus nerka

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