Year of grant:
Náttúra og náttúrutilfeingi
Minking av laksalúsapláguni í Føroyum
Tróndur J. Kragesteen
Ken H. Andersen, Andre Visser, Knud Simonsen, Lars Asplin, Crawford Revie, Gunnvør á Norði, Kirstin Eliasen
Grant from the FRC in DKK:
The aquaculture industry has seen a steady high growth over the last two decades and the production of Atlantic salmon was alone 2 m tonnes in 2015. However, there is also a growing challenge to combat sea lice infestations, which has also seen a growth in abundance as well as resistance in the last decade. Managing sea lice has not been eﬀective due to the lack of understanding how sea lice spread in a local and regional scale. Therefore numerical models of the dispersion of sea lice to be used as a managing tool in the industry under development and partly applied in near all salmon producing countries.
This PhD is the first attempt to construct such a numerical management tool for Faroe Islands, the third largest Atlantic salmon producer in Europe. The first step in the project is to investigate how the Faroese aquaculture farms are hydrodynamically connected with reference to salmon lice. Thereafter the research will focus on implementing a SIR model for Faroese salmon farms. This model will provide information on how important the external and internal infections are to the population dynamics at farm location as well for the entire system of fsh farms by integrating into the numerical hydrodynamic model. The third part will focus on improving process descriptions like eﬀects of changing weather situations and salmon lice behaviour and investigate the robustness of the established model system to variabilities in the included parameters. Throughout the development process, the model system will be validated towards available sea lice data.
The final part of the project is to use the model complex to investigate treatment and management strategies to reduce the sea lice infection pressure. In this process location of farms, eﬀects of cleaner fish and traditional treatments methods, eﬀectiveness of fallowing periods will be investigated to develop a first rational management system for the Faroes aquaculture based on knowledge of nature and the conditions that inﬂuence it.