Biological effects of dietary T-2 toxin on rainbow trout, Salmo gairdneri
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Abstract
A 16-wk feeding study was conducted to evaluate the chronic toxicity of graded levels (0, 1.0, 2.5.5, 10 and 15 mg/kg of chemically pure dietary T-2 toxin (4,15-diacetoxy-8-(3-methylbutyryloxy)-12,13-epoxy-Δ9-tricothecen-3-ol) in 1-g rainbow trout, Salmo gairdneri, held in 9°C single-passage well water. Levels of T-2 toxin > 2.5 mg/kg depressed growth, efficiency of feed use, hematocrit, blood hemoglobin concentration and feed acceptance, and caused a transitory edema in a dose-dependent manner. Growth of trout fed a semipurified diet containing the toxin was described by the function: Y = 0.265 + 142.075 e(0.029X1− 1.554x23.7), where Y = gain as percentage starting weight per wk; X1 is time in wk and 0 ⩽ X1⩽16; and X2 is T-2 content of diet in mg/kgand 0⩽X2⩽15.
Exposure of fish to T-2 toxin did not affect activity of intestinal lumen chymoirypsin or trypsin, nitrogen digestibility or metabolizabte energy. Feeding of 15 mg/kg T-2 toxin to adult trout caused hemorrhaging in the intestines and regurgitation of subsequently intubated feed regardless of T-2 loxin content.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Biological effects of dietary T-2 toxin on rainbow trout, Salmo gairdneri |
| Series title | Aquatic Toxicology |
| DOI | 10.1016/0166-445X(82)90007-8 |
| Volume | 2 |
| Issue | 2 |
| Year Published | 1982 |
| Language | English |
| Publisher | Elsevier |
| Contributing office(s) | Leetown Science Center |
| Description | 10 p. |
| First page | 79 |
| Last page | 88 |
| Google Analytic Metrics | Metrics page |