This set of Marine Biotechnology Multiple Choice Questions & Answers (MCQs) focuses on “Integrated Multi-trophic Aquaculture”.
1. Flow-through is a type of intensive aquaculture.
a) True
b) False
View Answer
Explanation: Flow-through system, also commonly known as raceways is a type of intensive culture in which finfish are stocked densely on the basis flow rate of incoming water. The only source of nutrition is pellet feed.
2. The water flow-rate is calculated on the basis of _______________
a) salinity requirement
b) oxygen requirement
c) turbidity
d) fish stock
View Answer
Explanation: The water flow rate in conventional flow-through systems is calculated based on a wide range of parameters. The flow rate must be more than that required for removal of metabolic wastes.
3. IMTA minimizes energy losses.
a) True
b) False
View Answer
Explanation: Integrated multi-trophic aquaculture aims at minimizing energy losses and environmental deterioration. This results in a sustainable aquaculture practice that uses circular economy approach.
4. Regular monitoring of which of the following is not done?
a) Phosphate
b) Ammonia
c) Nitrite
d) Hydrogen sulfide
View Answer
Explanation: During the initial days of an intensive aquaculture unit, few levels are regularly monitored to ensure levels of these below threshold. Hydrogen sulfide is a foul-smelling gas that need not be monitored regularly due to is characteristic smell.
5. Alexandrium fundyense is the dinoflagellate responsible for _______________
a) Nitrification
b) Sulfide production
c) Eutrophication
d) Paralytic shellfish poisoning
View Answer
Explanation: Alexandrium fundyense is a naturally occurring dinoflagellate in the Bay of Fundy, Canada. It is responsible for releasing paralytic shellfish poisoning (PSP) toxins in the surrounding waters.
6. Cod and haddock are groundfish.
a) True
b) False
View Answer
Explanation: Cod and haddock are groundfish varieties used in aquaculture in Canada and other countries. Other popular species of aquaculture in Canada are salmonids and shellfish.
7. Mussels are capable of reducing __________________
a) ammonia
b) citrate
c) virus
d) marine fungi
View Answer
Explanation: Research has led to the development that mussels (Mytilus edulis) are capable of reducing loads of the infectious salmon anemia virus (ISAV) in culture water. Hence appropriately placed mussels around salmon cages can act as potential biofilters.
8. Choose the correct option.
| 1. Sea vegetables | a. Botanicals |
| 2. Phycocolloids | b. Alginate |
| 3. Phycosupplements | c. Nori |
a) 1-c 2-b 3-a
b) 1-a 2-b 3-c
c) 1-b 2-a 3-c
d) 1-a 2-c 3-b
View Answer
Explanation: The main components of world’s seaweed industry are large-scale production of sea vegetables, phycocollloids, and phycosupplements. Nori is a sea vegetable, alginate is a phycocolloid while botanicals are phycosupplements.
9. ________________ is not a carbon source for phototrophic bacteria.
a) Acetate
b) Pyruvate
c) Ethanol
d) Vitamin B12
View Answer
Explanation: Acetate, pyruvate, cyclohexane carboxylate, and ethanol are sources of carbon for phototrophic sulfur bacteria found in polluted waters. Biotin and vitamin B12 are growth factors.
10. ______________ can be measured by CsCl2 density gradient centrifugation.
a) DNA base ratio
b) RNA base ratio
c) Turbidity
d) Growth phase
View Answer
Explanation: DNA base ratio can be measured using CsCl2 density gradient centrifugation. The technique is routinely applied to assess the microbial populations in samples collected from aquaculture sites.
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.
