US Fish & Wildlife Service


Date of this Version



Published in Journal of Parasitology, Vol. 43, No. 6 (Dec. 1957), pp. 613-627


During the summers of 1953, 1954, and 1955, many brook stickleback, Eucalia inconstans, from the English Coulee, a small stream in Grand Forks, were found infected with an unrecorded species of diplostomulum metacercaria; its life cycle has been reported in abstract (Hoffman, 1955). In 1953, 51 (82%) of the 62 sticklebacks examined were infected, but in 1955 a much smaller number was infected; no exact records were kept in 1954 and 1955. The number of diplostomula per fish ranged from 0 to 335. During the summer of 1956 lightly infected stickleback were also found in Turtle River, Kelly's Slough, and Freshwater Coulee.