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ICAR JRF Fish Nutrition And Feed Technology 29 Jun 2024Shift 1
MCQ (Single Correct)
+4
−1
Which of the following is an RGL (Relative Gut Length) of carnivore?
EXPLANATION
Comparative Digestive Tract Anatomy, Relative
- Correlation Between Diet and Digestive Tract Length:
- Carnivorous Fishes: Consume protein-rich, highly digestible animal prey that requires shorter digestion and absorption times. They possess a short gut with $RGL \lt 1.0$ (typically $0.3 - 0.8$).
- Omnivorous Fishes: Consume mixed plant and animal diets; intermediate gut length with $RGL \approx 1.0 - 3.0$.
- Herbivorous Fishes: Consume fibrous, low-digestibility plant material and algae containing cellulose; require extended gut length and transit times, with $RGL$ values ranging from $3.0$ to $\gt 15.0$ (e.g., Labeo rohita $\approx 6-8$; Hypophthalmichthys molitrix $\approx 10-15$).
- nalysis:
- (0.33): Correct (typical of carnivores, $RGL \lt 1$).
- Options 1, 3, 4 (62, 24, 47): Extremely high values typical of strict detritivores or herbivores (or OCR artifact values).
Correct option: (2) 0.33
Explanation not matching this question?
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