Vibriosis vaccination of rainbow trout Salrno gairdneri at varying temperatures and seasons. I Effects on mortality and feed conversion in four Swedish field trials
- 1 January 1988
- journal article
- research article
- Published by Inter-Research Science Center in Diseases of Aquatic Organisms
- Vol. 5 (3) , 179-183
- https://doi.org/10.3354/dao005179
Abstract
Vibriosis vaccine trials were conducted on 4-Swedish brackish water rainbow trout Salmo gairdneri net-pen farms. Intraperitoneal (IP) vaccination of fall- and spring-transport yearlings at 3 to 16.degree. C provided significant protection against mortalities from Vibrio anguillarum, serotype 1 (VA). Dip-vaccination of fingerlings provided only slight protection of limited duration. Non-vaccinated trout on one farm had a higher feed conversion ratio (FCR) than corresponding vaccinated trout. However, on 2 other farms, there were no significant differences in the FCRs of non-vaccinated and vaccinated trout. Any benefits of the efficiency of food utilization conferred by vaccination therefore appeared to be farm-specific, but contributing factors were not identified.Keywords
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