"Focus of my four week visit at WCL is to analyze Baltic Sea salmon (Salmo salar L.) muscle and eggs for fatty acids as a collaborator in the group of LIPTOX led by Dr. Martin Kainz. Fatty acids should help me reveal the last feeding areas of returning salmon in the Baltic Sea. The second purpose for FA analysis is to assess the main prey species proportions (herring and sprat) in salmon diet: is there a dietary effect on female salmon reproduction success? Also separation of reared and wild salmon using fatty acid profiles is strongly considered."