| [further information on fish parasites from lake trasimeno. ii. observations on the population of scardinius erythrophthalmus l]. | an investigation was carried out to identify the actual state of parasitism in the scardinius erythrophthalmus l. population of trasimeno lake (umbria, italy). seasonal samples of fishes were taken in different points of the litoral and pelagic zones. the parasites found, together with the somatometric values and the characteristics of their localizations are reported. it has been found: a high number of infested specimens; eleven species of parasites, of which five were not yet known to be in t ... | 1983 | 6414493 |