Population genetic structure of wrasses used as cleanerfish in Atlantic salmon farming in Norway

摘要

The increasing use of wrasses as cleaner fish in the salmon farming industry has createdlocal fishery in many regions in Norway. In several cases, live fish have been transportedbetween regions without knowledge of the population structure of the three species inquestion (goldsinny, Ctenolabrus rupestris, rock cook, Crenolabrus exoletus, andcorkwing, Symphodus melops ). Genetic studies based on variation in proteins were carriedout, and polymorphic enzymes of potential use in popoulation studies were identified forall three species. For the most common wrasse the goldsinny, four loci (SDH-1*; PGM-1*; GPI-1* and GPI-2*) were used to study genetic variation between geographic regions.Five samples collected in the southern part of Norway were compared and significantvariation in allele frequencies were detected for SDH-1* and PGM-1*. The variationseemed to be associated with specific fjord - coastal area distribution.