Skärsnultran tillhör putsarfiskarna, en grupp fiskar som plockar och äter parasiter som sitter på huden på andra större fiskar. Den har blivit mycket populär för att bekämpa laxlus i norska laxodlingar.
Photo: Paul Naylor

Genetic consequences of large scale harvest and translocation of cleaner fish for aquaculture

Research project

Short description

Cleaner fish are increasingly used in Norwegian salmon farming to combat salmon lice and other parasites. This has led to a high fishing pressure and annual translocation of millions of wild fish that are transported long distance, sometimes across national borders. We use genetic methods to describe wild populations of different species of cleaner fish. We study how they adapt to different environments, connectivity between populations and their role in the ecosystem. To understand how the translocation of fish affect local ecosystems and populations, we investigate methods for identifying cleaner fish that escape from salmon farms. This will contribute to a better understanding of the biology of the species, provide important information to the management for a more sustainable fishery, and create a tool for monitoring escaped fish.


University of Gothenburg

Carl André, Department of Marine Sciences – Tjärnö
Ellika Faust, Department of Marine Sciences – Tjärnö
Erik Selander, Department of Marine Sciences – Gothenburg

Collaborating partners

Håkan Wennhage, SLU Aqua
Kevin Glover, Norwegian Institute for Marine Research 
Kim Halvorsen, Norwegian Institute for Marine Research 
Eeva Jansson, Norwegian Institute for Marine Research 
Halvor Knutsen, Norwegian Institute for Marine Research