Fish food research. Researcher taking a blood sample from a rainbow trout. These fish have been fed on a plant-based feed. The blood test will show if the diet has any effect on plasma amino acid levels in the fish | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Ausmus, Stephen / US Department of Agriculture |
Bildgröße: | 2441 px × 3661 px |
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