Question

The weight of fish produced divided by the feed is given as:

• A. Food conversion efficiency
• B. Food conversion ratio
• C. Protein efficiency ratio
• D. Specific growth rate

Hint:

Always look at the numerator and denominator: - Feed Weight Gain = Food Conversion Ratio (FCR).
- Weight Gain Feed = Food Conversion Efficiency (FCE).

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
In aquaculture nutrition, feed performance and utilization efficiency are measured using mathematical ratios that relate feed intake to biomass gain.
Key Formula or Approach:
The two main indicators used are:
\[ \text{Food Conversion Ratio (FCR)} = \frac{\text{Weight of Dry Feed Consumed}}{\text{Wet Weight Gain of Fish}} \] \[ \text{Food Conversion Efficiency (FCE)} = \frac{\text{Wet Weight Gain of Fish}}{\text{Weight of Dry Feed Consumed}} \]

Step 2: Detailed Explanation:
- Food Conversion Efficiency (FCE) (1): Measures the weight gain of the fish per unit of feed consumed. It is calculated by dividing the weight of fish produced by the feed given.
It is expressed as a decimal or a percentage ($FCE = \frac{1}{FCR}$). A higher FCE value indicates better feed utilization.
- Food Conversion Ratio (FCR) (2): This is the inverse of FCE. It measures the amount of feed required to produce one unit of fish biomass.
A lower FCR value indicates more efficient feed conversion.
- Protein Efficiency Ratio (3): Calculated as weight gain divided by crude protein intake.
- Specific Growth Rate (4): Measures the daily percentage increase in fish weight over time.

Step 4: Final Answer:
The weight of fish produced divided by the feed is Food conversion efficiency.