Community Research and Development Information Service - CORDIS

Efficacy of SLICE® treatment on Atlantic salmon (Ireland)

In the present study SLICE®, the commercial in-feed treatment against sea lice, was used to treat hatchery-reared salmon smolts to determine its efficacy in protecting salmon smolts from sea lice infestation and determine its effects on their marine survival.

Results from the present study reveal a significant difference in the return rate of SLICE®-treated and control salmon smolts in three of four release groupings; these data suggest reduced mortality of smolts in the treated groups and hence perhaps protection from sea lice infestation in aquaculture bays. Given the presence of a significant source of sea lice infestation from marine salmon farms in both bays in the present study, increased mortality of salmon smolts can be expected.

The greater weight of returning adult salmon treated with SLICE® could be expected from enhanced growth of fish protected from high sea lice infestation. The findings of the present study demonstrate the potential impact of marine salmon farms on salmon post-smolt marine mortality in very short coastal bays in the West of Ireland.

Reported by

Central Fisheries Board
Mobhi Road, Glasnevin
Dublin 9 Dublin
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