Question

__________ is a Feeding Stimulent - Chemo attractant

• A. L-Amino acid
• B. Ergocalciferal
• C. Ethoxyquin
• D. Probiotics

Hint:

Adding free L-amino acids is particularly useful when formulating plant-based diets, as it compensates for the lack of natural marine flavors that carnivorous fish prefer.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
Feeding stimulants and chemo-attractants are compounds added to fish feeds to improve palatability and stimulate voluntary feed intake.
They target the olfactory (smell) and gustatory (taste) receptors of fish.

Step 2: Detailed Explanation:
Low-molecular-weight organic compounds, particularly specific free L-amino acids (such as glycine, alanine, and proline), are highly soluble in water and easily recognized by the sensory organs of fish.
They act as chemical signals indicating the presence of high-protein food.
Ergocalciferol is Vitamin \(D_2\), ethoxyquin is an antioxidant preservative, and probiotics are dietary microbial supplements.

Step 3: Final Answer:
Thus, L-amino acids function as effective feeding stimulants and chemo-attractants in aquaculture.