Published 2023

Read in Norwegian

Publication details

Journal : Journal of the World Aquaculture Society , p. 1–17 , 2023

International Standard Numbers :
Printed : 0893-8849
Electronic : 1749-7345

Publication type : Academic article

Contributors : Peña, Patricio; Bæverfjord, Grete; Skjerve, Eystein

If you have questions about the publication, you may contact Nofima’s Chief Librarian.

Kjetil Aune
Chief Librarian
kjetil.aune@nofima.no

Summary

A field study comparing two vaccine regimes against pancreas disease (PD) was carried out in 2018 S0 year class smolts at two commercial sea cage sites in southern Norway. The fish from the same hatchery source were immunized using licensed vaccines; either a DNA PD vaccine and a hexavalent oil-adjuvanted vaccine (group A), or a heptavalent oil-adjuvanted PD vaccine (group B). The experimental design included the two fish groups reared together (15% as group A and 85% as group B) in four large hatchery tanks. These fish groups were later transferred to four production cages at two separate sea sites (two cages per site). In the absence of any notable PD prior to the pre-harvest sampling, the primary objective and outcome variables entailed evaluation of vaccine side effects and their impact on growth. The results show that vaccine and sea cage site significantly impacted prevalence and severity of a newly described pathology named cross-stitch vertebrae. Further, moderate to severe cross-stitch pathology (scores ≥3) resulted in significantly reduced growth.

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