New Zealand Journal of Marine and Freshwater Research abstracts
Detection and New Zealand distribution of Myxobolus cerebralis, the cause of whirling disease of salmonids
N. C. BOUSTEAD
NIWA - Freshwater
National Institute of Water and Atmospheric
Research Ltd
P. O. Box 8602, Riccarton Christchurch, New Zealand
Abstract
Whirling disease, caused by
Myxobolus cerebralis, was diagnosed in rainbow trout
(Oncorhynchus mykiss) at Silverstream Fish Hatchery near Christchurch in 1980. As a consequence, a nationwide survey for
M. cerebralis in salmonids was conducted by examination of 5307 wild and hatchery fish. In addition, sentinel rainbow trout were used at six locations to test for whirling disease. This survey and other studies revealed
M. cerebralis at locations in the Waimakariri, Rakaia, and Rangitata River catchments, and provide the first New Zealand records of
M. cerebralis in brook trout
(Salvelinus fontinalis), chinook salmon
{Oncorhynchus tshawytscha), and sockeye salmon
(O. nerka). This paper demonstrates use of sentinel rainbow trout in detecting low-level asymptomatic infection of
M. cerebralis in chinook salmon.
Keywords whirling disease; Myxobolus cerebralis; distribution; chinook; sockeye; Salmonidae; rainbow; brown; brook; trout; Oncorhynchus tshawytscha; O. mykiss; O. nerka; Salmo trutta; Salvelinus fontinalis
New Zealand Journal of Marine and Freshwater Research, 1993: Vol. 27: The Royal Society of New Zealand 1993
Received 28 February 1992; accepted 29 April 1993
PDF file of entire paper: medium quality (488K); (scanned from paper original: notes about this process)
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