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Final Flashcards

(60 cards)

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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
What is the pH range for acids?
0 - 6.9
26
Aquaculture
Farming organisms in either fresh or saltwater
27
Typical personal protection equipment (PPE) for a lab:
- Goggles - Gloves - Aprons
28
How does an open system work?
It is usually in the open ocean and this allows water to flow through the farm (example: shellfish cages)
29
Salinity of saltwater
35 ppt
30
What is water's boiling temp in celsius and farenheit?
- 100 celsius - 212 farenheit
31
What aquaculture purpose uses largemouth bass, trout, walleye, pike?
Restocking
32
Dress code for a lab:
- Close-toed shoes - Leg coverings - Hair ties
33
How do farmers make sure the water quality is good?
Regularly monitor and adjust water
34
Purpose of a Bead (mechanical) filter
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
Examples of biosecurity practices:
- Disinfecting - Quarantining new organisms
36
What aquaculture purpose uses salmon, catfish, shrimp, trout, barramundi, oysters?
Food
37
What bacteria converts Nitrite to Nitrate?
Nitrobacters
38
How can diseases be introduced in an aquaculture system?
- Between animals in the facility - Adding animals from other facilities - Touching water in the facility
39
How is ASW made?
Mixing LPF water and mixing in specially formulated salt to mimic an ocean water salinity of 35 ppt
40
What system raises shrimp and trout?
Semi-closed
41
What is a range of anoxia (death causing) concentrations of dissolved oxygen?
0 - 3 parts per million or mg/L
42
How would a farmer adjust the temperature of the water in a RAS?
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
What bacteria converts Ammonia to Nitrite?
Nitrosomonas
44
What is the purpose of ornamental aquaculture?
Reduces collecting organisms from the wild to be sold as “pets” for decoration
45
Does trout stay in warm or cold water?
Cold
46
What is water's freezing temp in celsius and farenheit?
- 0 celsius - 32 farenheit
47
What is the water that goes through GAC filters called?
Non-potable freshwater (NPF)
48
How does a closed system work?
The ponds or tanks the organisms are grown in are completely self-contained and do not exchange water with the natural environment
49
What system raises salmon, cod, kelp, oysters, clams, scallops?
Open
50
What is a range of healthy concentrations of dissolved oxygen?
5 - 14 parts per million or mg/L
51
What functions as the biological filter in the coral tanks?
“Live rock” structure that the bacteria can grow on, that the corals attach to, and that the fish can hide in
52
How do you adjust water if is too fresh?
Take out up to or less than ⅓ total volume and replace it with 35 ppt ASW
53
What do you do if a fish tank is too fresh?
Take out up to ⅓ of the total water and replace it with ASW of 35 ppt
54
How would a farmer adjust the amount of oxygen in a RAS?
Adjust the valves to increase the water flow; add airstones to the tank
55
What aquaculture purpose uses zebrafish, medaka, mummichog?
Research
56
What is a range of hypnoxia (stressful) concentrations of dissolved oxygen?
3 - 5 parts per million or mg/L
57
What is biosecurity?
Practices taken to minimize the risk of introducing and spreading disease in an aquaculture facility
58
In the MSMHS aquaponic system, the grow beds function as which two filters?
Mechanical and biological
59
Pathway of H2O
City of Groton → Chemical filter → NPF storage tank → NPF pipes → fish tanks
60
Why are sick fish a concern?
They can transfer diseases to organisms, including humans

Marine Studies (5 decks)

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