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The influence of fish age and water temperature on mortalities of rainbow trout, Salmo gairdneri Richardson, caused by a European strain of infectious pancreatic necrosis virus
Author(s) -
DORSON M.,
TOUCHY C.
Publication year - 1981
Publication title -
journal of fish diseases
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.819
H-Index - 85
eISSN - 1365-2761
pISSN - 0140-7775
DOI - 10.1111/j.1365-2761.1981.tb01128.x
Subject(s) - salmo , rainbow trout , infectious pancreatic necrosis virus , biology , necrosis , virus , trout , fish <actinopterygii> , veterinary medicine , virology , zoology , fishery , medicine , genetics
Abstract. Rainbow trout fry were infected by a pathogenic Sp type of infectious pancreatic necrosis virus isolated in France. Fry held at 10°C and infected at different ages showed a decrease of sensitivity with increasing age and ceased to be susceptible to the disease when 20 weeks old. Mortality was delayed at 6°C and lowered or suppressed at 16°C. When fry were moved from 10 to 16°C before infection mortality was also lowered but not when they were moved from 16 to 10°C. Late infection of siblings kept at different temperatures before infection suggested a relation between the number of degrees x days and the final mortality recorded.