Czeczuga B., Bartel R., Czeczuga-Semeniuk E., 2002. Carotenoid content in eggs of Atlantic salmon (Salmo salar L.) and brown trout (Salmo trutta L.) entering Polish rivers for spawning or reared in fresh water. Acta Ichthyol. Piscat. 32 (1): 3-21.

The authors investigated the carotenoids content in yellow, yellow-orange, and orange eggs of salmon (Salmo salar L.) and brown trout (Salmo trutta L.) entering Polish rivers for spawning or reared in fresh water. The study shows the presence of females of both salmon and brown trout with the M74 syndrome.