Principle of Fish Nutrition

• Dietary Requirements for Broodstock: Reproductive success (fecundity, fertilization rate, egg hatchability, and larval survival) strongly depends on balanced broodstock nutrition:
• Vitamin E ($\alpha$-tocopherol): Potent lipid-soluble antioxidant that protects germ cell membranes against lipid peroxidation and regulates gonadal maturation.
• Proteins & Carotenoids: High-quality protein provides essential amino acids for vitellogenin (yolk protein) synthesis; carotenoids (astaxanthin) serve as antioxidant buffers and improve egg hatchability.
• Essential Fatty Acids (n-3 HUFA/PUFA): EPA, DHA, and arachidonic acid (ARA) are crucial for prostaglandin biosynthesis (mediating ovulation and spermiation) and embryonic development.
• nalysis:
• All these nutrients are essential for broodstock maturation, making Option 4 (All the above nutrients) correct.

Correct option: (4) Allthe above nutrients

• Classification of Fatty Acids by Unsaturation:
• Saturated Fatty Acids (SFAs): No double bonds (e.g., Palmitic acid, $16:0$; Stearic acid, $18:0$).
• Monounsaturated Fatty Acids (MUFAs): Contain exactly one double bond in the acyl chain:

• Polyunsaturated Fatty Acids (PUFAs): Contain two or more double bonds:
• Linolenic acid ($18:3\text{n-3}$, 3 double bonds)
• Arachidonic acid ($20:4\text{n-6}$, 4 double bonds)
• nalysis:
• (Oleic acid): Correct monounsaturated fatty acid ($18:1\text{n-9}$).

Correct option: (3) Oleic acid