AIC SS 2 Fisheries 3rd Term Exam 2023/24
  • 1. 1. A water quality factor which largely regulates others is _________
A) Dissolved oxygen
B) Photosynthesis
C) Respiration
D) Temperature
  • 2. 2. The process of utilization of the feed consumed for growth and maintenance is _________
A) Eutrophication
B) Respiration
C) Ration
D) Decomposition
  • 3. 3. The major source of nitrogen in a fish pond is
A) Fish waste
B) Fish feed
C) Clay particles
D) Fertilizers
  • 4. 4. A lethal value of dissolved oxygen that causes fish kills more than the fish mortality caused by other water quality factors combined is ________
A) 18F
B) 2ppm
C) 70%
D) 20g/l
  • 5. 5. One of these is not a buffering agent of alkaline source
A) Carbonate ion
B) Bicarbonate ion
C) Hydroxyl ion
D) Hydrogen ion
  • 6. 6. A major challenge in raising fish using the recirculatory system is ______
A) Build up of carbondioxied
B) Need of buffering system
C) Lethal increase in pH
D) Absence of photosynthesis
  • 7. 7. Which two fish water qualities analysis would be done by an expert who may not afford the cost of testing for all the water quality parameters?
A) Temperature and dissolved oxygen
B) Alkalinity and hardness
C) Turbidity and pH
D) Photosynthesis and respiration
  • 8. 8. Which of these is a natural food for fish?
A) Biological covers
B) Rice molass
C) Sugar cane bagass
D) Soya bean cake
  • 9. 9. Actively moving aquatic organisms are called _______
A) Necton
B) Benthos
C) Detritus
D) Plankton
  • 10. 10. One of these indicates an adequate amount of phytoplankton in a fish pond
A) A water transparency of 60cm
B) 3mlphytoplankton/ 100l of pond water
C) 110% saturated total ammonia
D) 20ppm hardness
  • 11. 11. Which of these types of feeds is characteristic of an intensive fish culture?
A) Fish
B) Supplementary feed
C) Complete feed
D) Natural food
  • 12. 12. A dry feed has _______ moisture
A) 30%
B) 15%
C) 10%
D) 50%
  • 13. 13. Adoption of more feeding regime or frequency is necessary to _______
A) Encourage food wastage
B) Discourage uniformity in fish size
C) Reduce dissolved oxygen consumption of fish
D) Improve nutrient loss by leaching
  • 14. 14. Sinking feeds are fed to fish
A) At selected pond area
B) Either
C) On entire pond area
D) Neither
  • 15. 15. What is the ratio of cement, sand and gravel for construction of a concrete pond?
A) 25%
B) 0.5 difference
C) 1:2:4
D) 1:2:1
  • 16. 16. The best soil for construction of an earthen pond has _______ amount of clay
A) 25%
B) 50%
C) 70%
D) 4%
  • 17. 17. One importance of the dike of an excavated pond is
A) High water holding capacity
B) Disallowing run off into the fish pond
C) Good water drainage
D) Avoiding soil erosion
  • 18. 18. One reason for a 20g/ml carbondioxide level in a water recirculatory system is
A) Microbial degradation
B) Supplementary feeding
C) Adequate photosynthesis
D) Absence of buffer system
  • 19. 19. Pond water nitrogen content is measured in
A) Percentage saturation
B) Parts per million
C) Centimetre
D) Milligram per litre
  • 20. 20. At what level is water hardness maintained for cultured fish
A) 110%
B) 5ppm
C) 20mg/l
D) 60cm
  • 21. 21. In which of these containers is pond water regarded as pure?
A) Concrete pond
B) Plastic pond
C) Earthen pond
D) Recirculatory pond
  • 22. 22. Buffer systems are naturally available in
A) Recirculatory pond
B) Earthen point
C) Plastic pond
D) Concrete pond
  • 23. 23. The carrying capacity of an ecosystem is
A) The interaction of lives with the non living environment
B) The number of lives it can support
C) The nutrient content
D) The types of lives present in it
  • 24. 24. A fish cum cassava farmer will likely use high fiber feedstuffs for
A) Compost
B) Forage
C) Fish feed
D) Ration
  • 25. 25. One of these is wrong about natural foods
A) Examples are larvae and water lettus
B) They can be initiated through decomposition
C) They are life and dead foods
D) The are formulated/prepared
  • 26. 26. Which group of natural food is the worm?
A) Necton
B) Plankton
C) Detritus
D) Benthos
  • 27. 27. The quality and the quantity of plankton in a fish pond means
A) The behaviour and the number
B) The species and the habitat
C) The nutrient and the size
D) The type and the amount
  • 28. 28. One of these is not a supplementary feed of protein source
A) Wheat middling
B) Fish meal
C) Groundnut cake
D) Rumen content
  • 29. 29. Identify the option that is not a problem of too fine feed
A) Sinking ability
B) Floating ability
C) Disatisfaction
D) Wastage
  • 30. 30. Adopting Daily Feeding Rate in fish feeding means
A) Feeding fish to compensate for over stocking
B) Feeding fish with certain mass to achieve a known body weight
C) Feeding fish with certain mass of its body weight
D) Feeding fish with certain mass for a period of time
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