Question

__________ are antioxidants which can be added in feed of a cultivable fish.

• A. Alginates and Tapoica
• B. Ethoxyquin and BHT
• C. Carrageenan and Gelatin
• D. Ergocalciferal and Vitamin K\(_1\)

Hint:

Aquafeeds with high levels of fish oil require robust antioxidants like BHT or ethoxyquin to prevent the formation of toxic lipid peroxides, which can harm fish health.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
Antioxidants are feed additives used to prevent lipid peroxidation (rancidity) in feed.
They protect polyunsaturated fatty acids (such as EPA and DHA) and fat-soluble vitamins from degradation during processing and storage.

Step 2: Detailed Explanation:
Ethoxyquin and Butylated Hydroxytoluene (BHT) are synthetic antioxidants widely used in the animal feed industry.
They scavenge free radicals and terminate chain reactions that lead to rancidity in oil-rich ingredients.
Alginates, tapioca, carrageenan, and gelatin act primarily as binders, while ergocalciferol and Vitamin K\(_1\) are essential dietary vitamins.

Step 3: Final Answer:
Therefore, Ethoxyquin and BHT are synthetic antioxidants added to fish feed.