This set of Marine Biotechnology Multiple Choice Questions & Answers (MCQs) focuses on “Aquaculture and Mariculture – Set 3”.
1. The feed of young and mature Salmon is different.
a) True
b) False
View Answer
Explanation: Like most other fish species, feed for young juveniles and mature adult Salmon is very different. Fish that return to their native river to spawn do not feed actively however they still strike at an intervening fly.
2. Mollusc aquaculture is used as a ___________
a) remediation
b) biorefinery
c) biofuel production
d) methane production unit
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Explanation: Bivalves and molluscs can effectively remove nutrients from enriched waters having moderate quantities of nutrients present. Hence along with the main culture species, molluscs are used to mitigate environmental impacts.
3. What is responsible for mitigating erosion?
a) Aquaculture
b) Mangroves
c) Mariculture
d) Biofuels
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Explanation: Mangrove forests are responsible for mitigating erosion, maintaining coastal water quality and providing vital ecosystem services. Due to surge in shrimp aquaculture among other factors, the mangroves have decimated to less than 20%.
4. ___________ is associated with green-house gas emission associated with aquaculture.
a) Aeration
b) Pellet feed
c) Live feed
d) Vaccination
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Explanation: Energy consumption for aeration is responsible for green-house gas emission associated with aquaculture. However, the emission is still lower (2.2%) than those occurring in other food sectors.
5. The diversity of antibiotic resistance genes is ____________ by aquaculture.
a) increased
b) decreased
c) unaffected
d) independent of aquaculure
View Answer
Explanation: The diversity of antibiotic resistance genes increases due to aquaculture such cases have been reported in Thailand and Bangladesh. Extensive use of antibiotics has led to the increases in antibiotic resistance among marine organisms and culture species.
6. Rainbow trout is a cold-water species.
a) True
b) False
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Explanation: Rainbow trout is a cold water fish and hence its culture is difficult in the tropical areas. The environment and site selection are correlated affecting whether the aquaculture of a particular species can be undertaken in a geographical area.
7. Increased water temperature leads to ____________
a) increased oxygen level
b) increased ammonia
c) decreased metabolism
d) increased metabolism
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Explanation: In Increased water temperature leads to increased metabolism in aquaculture species. Water at higher temperature contains less oxygen; dip in dissolved oxygen levels puts the organisms under immense stress.
8. Cryptobiosis is a ______________
a) parasitic infection
b) bacterial infection
c) fungal infection
d) yeast infection
View Answer
Explanation: Cryptobiosis is a parasitic infection prevalent in farmed Salmon in hatcheries. The infection is transmitted through an intermediate host – leech that is present in intake water. Proliferative kidney disease in salmon and trout is also an example of transmitted disease.
9. Which is not used for remediation of acid sulphate soils?
a) Immunostimulant
b) Liming
c) Drainage cycles
d) Induced oxidation
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Explanation: Acid sulphate soils lead to a reduced pH in aquaculture facilities. To mitigate the effects remediation strategies such as liming, barricade construction, induced oxidation, inundation/drainage cycles with seawater.
10. In aquaculture, the carrying capacity is the limit of ____________
a) adjuvants used
b) organisms loaded
c) frequency of prophylactic drugs
d) number of moorings
View Answer
Explanation: Carrying capacity is the peak loading of aquaculture organisms that can be supported by the environment without any deleterious effects on stock, culture system, and the environment that holds the system.
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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