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Marine Studies > Final > Flashcards

Final Flashcards

1
Q

What do you do if a fish tank is too acidic?

A

Mix baking soda with NPF and add it to the tank

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2
Q

How do you adjust water if it is too salty?

A

Add freshwater

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3
Q

Purpose of a pump

A

Pumps are needed in each RAS to move the water from the fish tanks through the filters back to the fish tanks

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4
Q

Purpose of a chemical (GAC/granular activated carbon) filter

A

Removes chlorine and adjusts the pH of water from the City of Groton

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5
Q

Purpose of a heat exchanger

A

Water flows into the heat exchanger which will either warm or cool the water depdning on the fish

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6
Q

What can incorrect water temperature affect?

A
  • Feeding
  • Respiration
  • Growth
  • Reproduction
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7
Q

How does a semi-closed system work?

A

Natural water flows into ponds that hold the organisms and water flowing out gets rid of fish waste

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8
Q

What is the pH range for ocean water?

A

8.3 - 8.5

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9
Q

What is the purpose of aquaculture for research?

A

Studying organisms

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10
Q

What is the pH range for alkali bases?

A

7.1 - 14

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11
Q

Salinity of freshwater

A

0 ppt

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12
Q

What is salinity the measure of?

A

How much salt is in the water

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13
Q

What kind of organism is aquacultured to produce pearls?

A

Oysters (usually freshwater)

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14
Q

Purpose of a UV filter

A

A UV light kills microorganism by destroying DNA in bacteria

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15
Q

How can diseases be transferred in a lab?

A
  • Using unclean equipment in different tanks
  • Moving organisms between tanks
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16
Q

Purpose of a Biological Filter

A

Two groups of bacteria, nitrosomonas and nitrobacter grow in these filters

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17
Q

What should you do if chemicals get on you?

A

Wash the area with running water for several minutes

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18
Q

What is the purpose of aquaculture for food?

A

To be able to farm large amounts of organisms rather than having to catch them in the wild

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19
Q

Does barramundi stay in warm or cold water?

A

Warm

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20
Q

What is the purpose of aquaculture for restocking?

A
  • Increases population of organisms in the wild
  • Stocks organisms for recreational fishing
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21
Q

What is the pH range for freshwater?

A

5.5 - 7.5

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22
Q

Purpose of NPF pipes

A

NPF pipes move the water from the storage tank to the fish tanks

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23
Q

What aquaculture purpose uses freshwater = koi, goldfish, Betta fish, “GloFish”
Saltwater = clownfish, coral

A

Ornamental

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24
Q

Purpose of LPA pipes

A

Connects airstones to fish tanks

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25
Q

What is the pH range for acids?

A

0 - 6.9

26
Q

Aquaculture

A

Farming organisms in either fresh or saltwater

27
Q

Typical personal protection equipment (PPE) for a lab:

A
  • Goggles
  • Gloves
  • Aprons
28
Q

How does an open system work?

A

It is usually in the open ocean and this allows water to flow through the farm
(example: shellfish cages)

29
Q

Salinity of saltwater

A

35 ppt

30
Q

What is water’s boiling temp in celsius and farenheit?

A
  • 100 celsius
  • 212 farenheit
31
Q

What aquaculture purpose uses largemouth bass, trout, walleye, pike?

A

Restocking

32
Q

Dress code for a lab:

A
  • Close-toed shoes
  • Leg coverings
  • Hair ties
33
Q

How do farmers make sure the water quality is good?

A

Regularly monitor and adjust water

34
Q

Purpose of a Bead (mechanical) filter

A

Removes solids from water and bacteria in this filter decomposes the solids, releasing ammonia into the water that will flow to the next filter

35
Q

Examples of biosecurity practices:

A
  • Disinfecting
  • Quarantining new organisms
36
Q

What aquaculture purpose uses salmon, catfish, shrimp, trout, barramundi, oysters?

A

Food

37
Q

What bacteria converts Nitrite to Nitrate?

A

Nitrobacters

38
Q

How can diseases be introduced in an aquaculture system?

A
  • Between animals in the facility
  • Adding animals from other facilities
  • Touching water in the facility
39
Q

How is ASW made?

A

Mixing LPF water and mixing in specially formulated salt to mimic an ocean water salinity of 35 ppt

40
Q

What system raises shrimp and trout?

A

Semi-closed

41
Q

What is a range of anoxia (death causing) concentrations of dissolved oxygen?

A

0 - 3 parts per million or mg/L

42
Q

How would a farmer adjust the temperature of the water in a RAS?

A

Adjust the thermostat on the heat exchanger a couple of degrees and wait at least 24 hours to decide if it needs more adjustment

43
Q

What bacteria converts Ammonia to Nitrite?

A

Nitrosomonas

44
Q

What is the purpose of ornamental aquaculture?

A

Reduces collecting organisms from the wild to be sold as “pets” for decoration

45
Q

Does trout stay in warm or cold water?

A

Cold

46
Q

What is water’s freezing temp in celsius and farenheit?

A
  • 0 celsius
  • 32 farenheit
47
Q

What is the water that goes through GAC filters called?

A

Non-potable freshwater (NPF)

48
Q

How does a closed system work?

A

The ponds or tanks the organisms are grown in are completely self-contained and do not exchange water with the natural environment

49
Q

What system raises salmon, cod, kelp, oysters, clams, scallops?

A

Open

50
Q

What is a range of healthy concentrations of dissolved oxygen?

A

5 - 14 parts per million or mg/L

51
Q

What functions as the biological filter in the coral tanks?

A

“Live rock” structure that the bacteria can grow on, that the corals attach to, and that the fish can hide in

52
Q

How do you adjust water if is too fresh?

A

Take out up to or less than ⅓ total volume and replace it with 35 ppt ASW

53
Q

What do you do if a fish tank is too fresh?

A

Take out up to ⅓ of the total water and replace it with ASW of 35 ppt

54
Q

How would a farmer adjust the amount of oxygen in a RAS?

A

Adjust the valves to increase the water flow; add airstones to the tank

55
Q

What aquaculture purpose uses zebrafish, medaka, mummichog?

A

Research

56
Q

What is a range of hypnoxia (stressful) concentrations of dissolved oxygen?

A

3 - 5 parts per million or mg/L

57
Q

What is biosecurity?

A

Practices taken to minimize the risk of introducing and spreading disease in an aquaculture facility

58
Q

In the MSMHS aquaponic system, the grow beds function as which two filters?

A

Mechanical and biological

59
Q

Pathway of H2O

A

City of Groton → Chemical filter → NPF storage tank → NPF pipes → fish tanks

60
Q

Why are sick fish a concern?

A

They can transfer diseases to organisms, including humans

Marine Studies (5 decks)

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