Principles Of Aquaculture Quiz 7 (20 MCQs)

Quiz Instructions

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1. ..... helps keep debris from adhering to eggs and larvae in the hatchery.

Correct Answer: C) Chelator.

2. The ..... is the height of the levee above the normal water level, generally between 1 and 2 feet.

Correct Answer: B) Freeboard.

3. Which of the following chemical hazards occur when pH levels are less than 2.0 or above 12.5?

Correct Answer: B) Corrosive.

4. Having a market for fish that are produced is a prime consideration when:

Correct Answer: C) Deciding on the species of fish to grow.

5. What is the common name of Lates calcarifer

Correct Answer: C) Sea bass.

6. Rank the three primary forms of fishing we covered (Pole, trawling, and longline fishing) from highest to lowest rates of bycatch.

Correct Answer: D) Trawling, Long line, Pole.

7. In shrimp, this infection causes a condition known as "milk" or "cotton" shrimp.

Correct Answer: D) Microsporidia.

8. Which is NOT an artificial incubator?

Correct Answer: D) Net.

9. Removing more organisms from a population than can be replaced

Correct Answer: C) Overharvesting.

10. Removal of solid particles from the tank by using a sponge, net, gravel or screen.

Correct Answer: B) Mechanical filtration.

11. In the Untied States, the blue ..... (mytilus edulis) is the only indigenous species cultured commercially.

Correct Answer: B) Mussel.

12. Eyestalk ablation, removal of one of the female's eyes, is an effective method to induce spawners of ..... to early maturation.

Correct Answer: C) Shrimp.

13. Aquatic invertebrate with a shell Ex:oyster

Correct Answer: C) Shellfish.

14. A ..... is a prolonged period of below average precipitation in an area.

Correct Answer: B) Drought.

15. The ability to maintain an ecological balance in an ecosystem is

Correct Answer: B) Sustainability.

16. The proposed shoreline a pond should be excavated to provide a depth of at least 10ft around the edge of the pond.

Correct Answer: B) False, Three Feet.

17. What would you expect to find if the dissolved oxygen level in a recirculating tanks dropped below 3.0 ppm?

Correct Answer: C) Dead fish.

18. Most commercial levee-type fish ponds are

Correct Answer: D) Rectangular.

19. Amount of crops produced per unit area

Correct Answer: D) Yield.

20. The following are culture system that used in aquaculture industry EXCEPT

Correct Answer: D) Semi extensive.