Investigating some effects of using selenium in marine fish feed

Selenium is a non-metallic element and a kind of essential micronutrient for the body, which has chemical properties similar to oxygen and sulfur. Due to its unique physical, chemical and biological characteristics, it plays an important role in the ecosystem cycle of running and sea waters. Selenium is one of the low-requirement substances for animals, which as a cofactor in the structure of glutathione peroxidase enzyme plays an essential role in inhibiting the destructive effects of free radicals in the body and is vitally important in the antioxidant defense system, thyroid hormones and insulin function, regulation It has cell growth and fertility maintenance. Today, selenium-containing diets have received much attention in the feeding of aquatic animals. It is important to use the appropriate selenium supplement in the diet to improve the performance of aquatic growth and physiological and biochemical functions in fish. Selenium is used in inorganic, organic and nano forms in fish feed, but the use of inorganic selenium in fish food formula has been more than other forms.