Skip to main content
U.S. flag

An official website of the United States government

The protozoan diseases of hatchery fish

January 1, 1935

Following the somewhat bleak picture painted in the consideration of the bacterial diseases of hatchery fish in the last number of The Progressive Fish Culturist, it is a relief to turn to another large group of fish diseases caused by small, single-celled parasitic animals known as the protozoa. To the hatcheryman, the protozoan diseases of fish are just as important as the bacterial diseases for they are equally destructive if allowed to run unchecked. The protozoan diseases are just as common as those caused by bacteria, particularly at those hatcheries which depend upon lakes or streams for their water supplies. However, a very cheery point of difference exists between these two groups of diseases—the protozoan diseases are easier to recognize and, for the most part, they are exceedingly easy to eradicate. To the hatcheryman who has struggled day and night for weeks in an attempt to combat an epidemic wherein he is rewarded immediately by the satisfying sight of a complete recovery of his infected fish as the direct result of his labors.

Publication Year 1935
Title The protozoan diseases of hatchery fish
DOI 10.1577/1548-8640(1935)26[1:TPDOHF]2.0.CO;2
Authors F. F. Fish
Publication Type Article
Publication Subtype Journal Article
Series Title Progressive Fish-Culturist
Index ID 70006901
Record Source USGS Publications Warehouse
USGS Organization Western Fisheries Research Center