Marine Biotechnology Questions and Answers – Sustainable Marine Food Production Systems – Set 7

This set of Advanced Marine Biotechnology Questions and Answers focuses on “Sustainable Marine Food Production Systems – Set 7”.

1. Strong disinfection procedures in RAS can lead to _______________
a) altered microbiota
b) improved filter performance
c) better fish health
d) increased air flow rate
View Answer

Answer: a
Explanation: Strong disinfection procedures in recirculating aquaculture systems (RAS) can result in altered microbial communities. A shift in the normal microflora is conducive for outgrowth of pathogenic microbes.

2. Neocortex is lacking in fish.
a) True
b) False
View Answer

Answer: a
Explanation: Neocortex (or neopallium) is a set of layers of cerebral cortex associated with perception and decision making. This neural region is lacking in fish hence it is hypothesized that fish cannot suffer.

3. Choose the appropriate option.

1. Physical stressor i. Capture, handling
2. Chemical stressor ii. Sound, presence of predator
3. Perceived stressor iii. Pollution, low O2

a) 1-i, 2-iii, 3-ii
b) 1-i, 2-ii, 3-iii
c) 1-iii, 2-ii 3-i
d) 1-ii, 2-ii, 3-iii
View Answer

Answer: a
Explanation: In intensive aquaculture systems animal welfare is intricately linked to performance of the systems. There are primarily three kinds of stressors that may arise in routine operation and lead to diminished animal welfare.

4. Choose the appropriate option.

1. Primary response a. Behavioral changes
2. Secondary response b. Increase in glucose levels
3. Tertiary response c. Increase in hormone levels

a) 1-c, 2-b, 3-a
b) 1-c, 2-a, 3-b
c) 1-a, 2-b, 3-c
d) 1-b, 2-a, 3-c
View Answer

Answer: a
Explanation: Fish react to the surrounding environment by responding in three different levels. The one easiest to discern or visually inspect is the tertiary response that involves changes in feeding, breeding and swimming behavior.

5. _______________ is adaptive function in response to perceived threat.
a) Welfare
b) Alkalinity shift
c) Biofilter deterioration
d) Stress
View Answer

Answer: d
Explanation: Stress is an adaptive function that manifests into various responses, when the fish perceive threat. Threat can be from a predator, intense sound, and microbial shift in the environment or other factors that are not normal.

6. _______________ can lower stress sensitivity in fish.
a) Carboxylic acid
b) Humic acid
c) Ascorbic acid
d) Acetic acid
View Answer

Answer: c
Explanation: According to several reports addition of ascorbic acid as a feed supplement has been shown to lower stress sensitivity in fish. However feed supplements and their effects on the organisms are species specific.

7. Change in foraging behavior is a lookout sign.
a) True
b) False
View Answer

Answer: a
Explanation: Tertiary responses to stressors of various kinds are discernible and easy to suspect in aquatic production systems. Lookout signs include changes in foraging behavior, swimming pattern, feeding behavior among others.

8. ________________ are chemicals released by plants.
a) Steroids
b) Allelochemicals
c) Corticosteroids
d) Phytochemicals
View Answer

Answer: b
Explanation: Allelochemicals are released by plants also known as secondary metabolites in order to maintain biotic and abiotic stressors. Aquaponics involves the incorporation of agriculture and aquaculture, production of allelochemicals in this regard is instrumental.

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.

If you find a mistake in question / option / answer, kindly take a screenshot and email to [email protected]

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Manish Bhojasia - Founder & CTO at Sanfoundry
Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

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