This set of Marine Biotechnology Multiple Choice Questions & Answers (MCQs) focuses on “Aquaculture Science”.
1. In a recirculating aquaculture system ___________________
a) culture water is renewed
b) fish production is less
c) only tilapia can be farmed
d) culture water is reused
View Answer
Explanation: In a recirculating aquaculture system (RAS), the culture water is reused to save water and enabling a controlled cultured environment. Since the water is reused continuously, suspended and organic matter must be removed efficiently.
2. Drum filter and sedimentation filter are types of __________________
a) mechanical filter
b) biological filter
c) disinfection unit
d) feed reservoir
View Answer
Explanation: The major parts of an RAS system include fish tank, mechanical filter, biological filter, and pump tank. Drum filters and sedimentation tanks are examples of mechanical filters that remove suspended solids from the water.
3. RAS gives fully controlled environment for the fish.
a) True
b) False
View Answer
Explanation: Recirculating aquaculture system (RAS) gives full control over the environment in which fish are farmed, and the occurrence of diseases. The RAS systems also lead to efficient use of energy, water, and land.
4. The sedimentation tank is filled with _______________________
a) clay
b) silt
c) alginate
d) polypropylene filter
View Answer
Explanation: Suspended solids settle on the polypropylene filter pack driven by action of gravity. The suspended solids containing culture water passes through the mechanical filter and the silt film forms on the filter.
5. Which is not true for a drum filter?
a) A biological filter
b) A mechanical filter
c) Requires continuous electricity
d) Does not require daily maintenance
View Answer
Explanation: Drum filter is a type of mechanical filter that aids in removal of suspended solids. An alternate to gravity separation by the sedimentation tank, drum filters require no daily maintenance.
6. ________________ is a waste product of protein digestion.
a) Ammonia
b) Nitrogen gas
c) Nitrate
d) Nitrite
View Answer
Explanation: Ammonia is a waste product of protein digestion, excreted by the fish. The feed used in controlled aquaculture systems is rich in proteins leading to increased concentration of ammonia in the culture water.
7. Which has antibacterial and antiseptic effect?
a) UV-A
b) UV-B
c) UV-C
d) Vacuum-UV
View Answer
Explanation: The UV-C light has a proven antiseptic an antibacterial effect, killing of germs, fungi, and viruses. The UV-C light is used for disinfecting the recirculating water to preclude disease outbreaks in RAS systems.
8. RAS is also known as flow-through system.
a) True
b) False
View Answer
Explanation: Recirculating aquaculture system (RAS) is the one where culture water is filtered and reused, new water being added only to make up for splash out and evaporation. Flow through or raceway systems are different in the sense that the culture water flows through the culture tank only once.
Sanfoundry Global Education & Learning Series – Marine Biotechnology.
To practice all areas of Marine Biotechnology, here is complete set of 1000+ Multiple Choice Questions and Answers.
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