[Comparative parasitological analysis of White Sea herring fry (Clupea pallasi n. maris-albi) raised experimentally and caught at sea]. / Sravnitel'nyi parazitologicheskii analiz molodi belomorskoi sel'di (Clupea pallasi n. maris-albi), vyrashchennoi v éksperimente i poimannoi v more.

Dynamics of the infection with pathogen trematodes of Brachyphallus crenatus (Rud., 1802) and Lecithaster gibbosus (Rud., 1802) in larvae and juvenile herring reared in experimental conditions and in those which were caught in the sea has been observed. Simultaneous infection of juvenile herring in natural environments and in experimental conditions has been noted. The parasitological examination of the material suggests the degree of natural mortality of larvae in the sea. The total rate of the juvenile herring infection in nature ranges from 22 to 92%.