3. Environmental toxicants and thiamine in connection with the M74 syndrome in Baltic salmon / P.K. Vuorinen & M. Keinanen -- 4. Comparison of lethal body burdens of different toxicants in Baltic salmon (Salmo salar) affected by the M74 syndrome / G.I. Petersen & F. Pedersen -- 5. Quality assurance of thiamine analyses in connection with investigations of reproductive disturbances in Baltic fish: a proficiency study / M. Loflund, P. Amcoff, S. Eerola, K. Hartikainen, S. Sistonen, P.J. Vuorinen & A. Soivio -- 6. Thiamine concentrations in herring (Clupea harengus) and sprat (Sprattus sprattus) in stomach contents of Baltic salmon (Salmo salar) - an experimental study / P. Koski -- 7. Thiaminase activity in the forage fish of Baltic salmon (Salmo salar) / A. Soivio & K. Hartikainen -- 8. Thiamine levels in migrating salmon spawners (Salmo salar) in the Gulf of Riga and in the Gulf of Bothnia / L. Karlsson, E. Ikonen, A. Mitans, S. Hansson & D. Uzars -- 9. Astaxanthin metabolism in eggs and larvae of Atlantic salmon (Salmo salar) / O.J. Torrissen, L. Balk & K. Ingebrigtsen -- 10. The aquacultural project to maintain natural stocks of Baltic salmon (Salmo salar) in Finland / A. Soivio, J. Piironen & P. Eskelinen -- 11. Molecular genetic studies of Baltic salmon (Salmo salar) affected by the M74 syndrome / G. Naevdal & O. Skaala -- 12. Scanning for reproductive disturbances in Baltic sea trout, Salmo trutta L. / P. Landergren, L. Vallin & L. Westin -- 13. Egg quality of Baltic cod, Gadus morhua / A. Nissling & L. Vallin -- 14. Maternal effects on egg size in cod, Gadus morhua, with implications for reproductive success in the Baltic Sea / L. Vallin, A. Nissling & L. Westin -- 15. Egg quality and endoparasitic infection in eggs of Baltic cod, Gadus morhua L / E. Kjorsvik, B.H. Pedersen & P.A. Wold