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Influence of Diet and Feeding Rate on the Performance and Production Cost of Rainbow Trout
Author(s) -
Reinitz Gary
Publication year - 1983
Publication title -
transactions of the american fisheries society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.696
H-Index - 86
eISSN - 1548-8659
pISSN - 0002-8487
DOI - 10.1577/1548-8659(1983)112<830:iodafr>2.0.co;2
Subject(s) - rainbow trout , salmo , hatchery , zoology , biology , fish <actinopterygii> , trout , fishery , composition (language) , feed conversion ratio , body weight , food science , endocrinology , linguistics , philosophy
Rainbow trout Salmo gairdneri with an initial weight of 2.1 g were fed a high‐protein, high‐fat diet or a low‐protein, low‐fat diet at three feeding rates (based on hatchery constants of 10, 20, or 30) for 308 days. The high‐protein, high‐fat diet fed at the intermediate rate yielded the optimum combination of fish growth, condition, and dress‐out weight with feed efficiency and unit cost. Diet affected the composition of fish carcasses: As the percent of dietary fat and protein increased, the percent of moisture decreased and the percent of fat increased; as feeding rate increased, the percent of protein and fat increased and the percent of moisture and ash decreased. Received January 3, 1983 Accepted August 2, 1983