Open AccessCURRENT PROBLEMS IN THE CONTROL OF CHANNEL CATFISH VIRUS
Author(s) -
Amend Donald F.,
McDowell Terry
Publication year - 1983
Publication title -
journal of the world mariculture society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.655
H-Index - 60
eISSN - 1749-7345
pISSN - 0735-0147
DOI - 10.1111/j.1749-7345.1983.tb00082.x
Subject(s) - broodstock , biology , catfish , fishery , salmo , ictalurus , aquaculture , virus , zoology , fish <actinopterygii> , veterinary medicine , virology , medicine
The only known methods of identifying stocks of fish which have been exposed to the channel catfish virus (CCV) is by previous history and possibly by testing the fish for serum neutralizing antibody (SNA) to CCV. Three catfish farms in California with no history of CCV had broodfish with positive SNA. Weekly monitoring of dead fry for CCV at two of the farms resulted in isolation of CCV even though daily mortality was low and ranged from about 0.1% to about 5%. In those ponds where 0.1% mortality occurred, no SNA positive fish were found in survivors 89 days following isolation of the virus, but positive SNA fish were found in ponds experiencing 5% mortality. In another test broodfish were assayed for SNA in the spring and fall to determine if seasonal differences in SNA occurred, but no correlation was established. These tests show that previous history and mortality rates were not a reliable method of determining previous exposure to CCV. Although there was a good correlation between detection of SNA in broodfish and the presence of CCV in fry, more information is needed before SNA tests can be used to accurately predict presence of CCV in channel catfish populations.