Rainbow Trout in a Nutritional Chamber at the Western Fish Nutritional Laboratory circa 1970-1972

Medium-sized fish contained in a transparent tube, oval-shaped in cross section. The container features two legs on either end of the tube, basically triangular-shaped, but with the top point reduced to a flat end. four flexible tubes/hoses lead from the container to spigots that feature knobs - one tube is connected to the top of the container, another is connected to the bottom and two are connected to the right-hand side.
Photo By/Credit

Nicholas Mariana

Date Shot/Created
Circa 1970-1972
Media Usage Rights/License
Public Domain
Image
Original caption: Rainbow trout in a nutritional chamber. The study of growing fish under carefully controlled experimental conditions provides guidance in quality fish production. Western Fish Nutrition Laboratory, Cook, Washington, c. 1970-1972. Note: The Western Fish Nutrition Laboratory is now part of the U.S. Geological Survey, and is now named the Columbia River Research Laboratory.
Species
Onchorynchus mykiss
Subject tags
Buildings, facilities and structures
Equipment
Fisheries
Fisheries management
Fishes
History
Research
Work of the Service