Original scientific paper
AN INDUSTRIAL-SCALE STUDY ON THE IMPACT OF VACCINATION UPON RAINBOW TROUT PERFORMANCE
T. V. Espersen
A. Fønss
B. D. Vestbö
E. McLean
E. Teskeredžić
Z. Teskeredžić
Abstract
The effect of intraperitoneal (ip) vaccination upon the performance of rainbow trout (n = 1611), maintained under commercial production conditions (aerated spring water, 9.8 ºC, 150 L/min), was evaluated over a 7-week period. Vaccine impact was examined with reference to control (n = 1683) and injected control (sterile filtered water; n = 1537) animals. All groups were run in triplicate (i. e., n 500 fish per gorup). Animals were fed to satiation twice daily. Vaccination suppressed (P<0.05) growth in weight over the entire period of study when compared to control treatments. A corresponding decline in specific growth rates (P<0.05), over the first 29 d of the trial, was also observed for vaccinated fish. Feed conversion efficiencies and feed ratio were similarly negatively affected in vaccinated animals for 29 d post-vaccination (P<0.05). The vaccine caused abdominal adhesions although no differences were observed in body composition.
Keywords
rainbow trout; adhesions; furunculosis; growth; vaccine; vibriosis
Hrčak ID:
4284
URI
Publication date:
1.12.1999.
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