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ICAR JRF Fisheries Technology And Engineering 29 Jun 2024Shift 1
MCQ (Single Correct)
+4
−1
How much is the burst speed of fish for short duration
EXPLANATION
Fish Behaviour, Trolling & Hydrodynamic Devic
- Swimming Speeds and Energetics in Fishes:
- Fish swimming performance is categorized into three speed regimes:
- Sustained (Cruising) Speed: $2 - 3\text{ body lengths/second (BL/s)}$ powered aerobically by red muscle without fatigue ($\gt 200\text{ minutes}$).
- Prolonged Speed: $4 - 7\text{ BL/s}$ maintained for $20\text{ seconds to } 200\text{ minutes}$.
- Burst Speed: $10\text{ body lengths per second (10 BL/s)}$ (and up to $12-15\text{ BL/s}$ in pelagics like tuna and mackerel). Powered anaerobically by white muscle glycogenolysis, sustainable only for very short bursts ($\lt 20\text{ seconds}$) for predator escape or prey capture.
- Correct Option: Option 1 (10 body lengths per second).
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