A Major Blood Group System in Atlantic Sea Herring

ual differences in human erythrocyte antigens by Landsteiner (1901) and subsequent findings of racial differences in the frequencies of particular antigens (summarized by Mourant, 1954), intensive serological studies of a number of animal species have been made. Blood group systems have been developed for cattle (Ferguson, 1941; Owen, Stormont, and Irwin, 1947; and Stormont, Owen, and Irwin, 1951), chickens (Briles, McGibbon, and Irwin, 1950; Scheinberg, 1956), and several other avian and mammalian species. Such blood groups have been found to be genetically determined, and genetic explanations for their existence and relationships have been proposed. Recent attention has been directed toward identifi-