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
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
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
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
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
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
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
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
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.
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