Success of oral treatment set to boost Scotland's National Sea Lice Strategy

摘要

Jim Treasurer of Seafish Aquaculture, Ardtoe, and Chris Wallace and Graeme Dear of Marine Harvest Scotland report on the use of oral treatments to control sea lice.ACOORDINATED National Sea Lice Treatment Strategy was introduced in Scotland in 1998 by member companies of the SSGA, now Scottish Quality Salmon (Rae, 2002). This entails farms treating fish in late win ter, at least by week 10, with follow up treatmentif required. The aim is to treat fish at a time when the viability of sea lice copepodids is low, with the objective of reducing the number of ovigerous females to as low a number as practicable (Wadsworth, Grant and Treasurer, 1998). This treatment strategy has been shown to have benefits for sea lice control on farms with reduced mortalities and downgrades at harvest. The aim is to minimise lice numbers when wild salmonid smolts migrate.