Improved recapture rate of vaccinated sea-ranched Atlantic salmon, Salmo salar L.

K. Buchmann, J.L. Larsen, Birgit Therkildsen

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Abstract

Vaccination of sea-ranched Atlantic salmon was conducted in order to investigate if immunoprophylactic measures could improve their survival. Fish were either vaccinated by bath or injection. A total of 66 000 fish were reared in fresh water at a hatchery on the island of Bornholm and at the presmolt stage were separated in three groups each comprising of 22 000 fish. One group was vaccinated intraperitoneally with a polyvalent vaccine (containing killed Vibrio anguillarum serotype O1 and O2, Yersinia ruckeri and Aeromonas salmonicida). A second group was bath vaccinated with the corresponding vaccine-components and the third group was used as a non-vaccinated control. One month after vaccination these groups were allocated to three separate net-pens located 500 m from the coastline of the island. After 4 months in the net-pens, 1000 fish from each cage were tagged with Carlin-tags below the dorsal fin. The fish were then released for a migration period in the Baltic Sea. Following a sea period of 40 months (45 months post- vaccination), the recapture rates of the groups were calculated from the returned tags from fishermen. Recapture of the injection vaccinated group was significantly higher (25%) compared with the bath vaccinated fish (14.7%) and the control group (16.8%)
Original languageEnglish
JournalJournal of Fish Diseases
Volume24
Issue number4
Pages (from-to)245-248
ISSN0140-7775
Publication statusPublished - 2001

Cite this

Buchmann, K., Larsen, J. L., & Therkildsen, B. (2001). Improved recapture rate of vaccinated sea-ranched Atlantic salmon, Salmo salar L. Journal of Fish Diseases, 24(4), 245-248.