Dietary organic selenium in yellowtail kingfish Seriola lalandi Valenciennes, 1833

The nutritional role of organic selenium in juvenile yellowtail kingfish Seriola lalandi was investigated. Common selenium deficiency symptoms were found in fish fed un-supplemented selenium fishmeal-based diets, whereas fish exposed to excessive levels of dietary selenium showed common signs of selenium toxicity. To prevent fish from deficiency symptoms, supplementation of selenium was required. The supplementation of organic selenium at appropriate levels demonstrated to increase immune and antioxidant responses and growth of juvenile yellowtail kingfish