Interpretation of Egg Shape Index (ESI)

Correct Answer: Rounded, Elongated

ESI = (Width / Length) × 100. A higher ESI means the width is relatively large compared to the length, indicating a rounder egg. A lower ESI means the egg is narrower relative to its length, making it more elongated.

Practical Example

• If an egg has width = 40 mm and length = 54 mm → ESI = (40/54) × 100 = 74 → standard chicken egg shape.
• If ESI = 80 → width/length ratio is higher → rounder egg.
• If ESI = 65 → width/length ratio is lower → elongated egg.

ESI Across Species

Why Other Options Are Wrong

• Elongated, Rounded → reverse of the correct interpretation.
• Elliptical, Circular / Circular, Elliptical → these are not the standard terms used for ESI interpretation.