“…The transferrin polymorphism was largely studied in fishes as a way to identify subpopulations. It has been observed in the eel (Drilhon et al, 1966), hake (Utter, 1969), halibut (Tsuyuki, Robert & Best, 1969), plaice (Ligny, 1966), tunas (Fujino & Kang, 1968), salmon (Moller, 1970;Utter et al, 1970), cod (Moller, 1966), carp (Creysell, Richard & Silberzahn, 1966).…”