Partial replacement of fish meal with spray-dried blood powder to reduce phosphorus concentrations in diets for juvenile rainbow trout, Oncorhynchus mykiss (Walbaum)
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Abstract
Feeds formulated with 5.7, 11.4 and 22.7% spray-dried blood powder, also called blood flour (88.1% protein, 0.2% total phosphorus), were compared with a control diet with 49% herring meal (64% protein, 2.1% total phosphorus) and no blood powder for rearing juvenile rainbow trout. Oncorhynchus my kiss (Walbaum). Diets with 5.7, 11.4 and 22.7% blood powder contained 1.22,1.03 and 0.84% phosphorus, respectively, compared with 1.36% phosphorus in the control diet. Over 12 weeks, differences in mean specific growth (range 2.23-2.35 day−1) or feed conversion (range 1.04-1.09) among the four diets were not significant (P > 0.05). Apparent digestibility of phosphorus in the diet with 22.7% blood powder was greater (45.2%) than that in the control diet (31.6%). Increases in phosphorus concentrations in the water in which trout were fed diets with blood powder (range 16-20 μg−1 total phosphorus) were 33-47% less (P<0.05) than in tanks where trout were fed the control diet (30μg−1 total phosphorus). Feed formulations for rainbow trout prepared with 22.7% blood powder and 17.0% fish meal would contain 65.3% less fish meal and 38% less total phosphorus than present in the control diet, which was a representation of a modern feed formulation for rainbow trout.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Partial replacement of fish meal with spray-dried blood powder to reduce phosphorus concentrations in diets for juvenile rainbow trout, Oncorhynchus mykiss (Walbaum) |
| Series title | Aquaculture Research |
| DOI | 10.1111/j.1365-2109.1995.tb00948.x |
| Volume | 26 |
| Issue | 8 |
| Year Published | 1995 |
| Language | English |
| Publisher | Wiley |
| Contributing office(s) | Leetown Science Center |
| Description | 11 p. |
| First page | 577 |
| Last page | 587 |
| Google Analytic Metrics | Metrics page |