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100問 • 3ヶ月前
  • Geneva Pahil
    • 通報

    問題一覧

  • 1

    When the salt content in it is less than 0.5 PPT

    Freshwater

  • 2

    It is the mixture of freshwater and salt water with the salt content ranging from 0.50 to 30 PPT

    Brackish Water

  • 3

    When the salt content is more than 30–35PPT

    Matine Water

  • 4

    It is the most important factor, influencing, fish, health, performance, and productivity

    Water Quality

  • 5

    What are some water quality factors?

    Source , During Culture , Discharge

  • 6

    States some source or origin of water

    underground , surface

  • 7

    What is the key to the successful culture of aquatic organisms?

    Maintenance of the water quality

  • 8

    Bluewater quality equates to

    Poor harvest

  • 9

    Water quality issues should be taken into account at every point of the agriculture accordinb to

    Dr. Claude E. Boyd

  • 10

    Source of water in terms of quality

    Red ride , Pasture, underground , forested, populated, unpopulated

  • 11

    During culture

    Fertile water, clear water , turbid water

  • 12

    Discharge

    Shrimp pond , catfish pond

  • 13

    Factors that influence, water quality

    photosynthesis/respiration, Water temperature, Fertilization , Feeds , Aeration , Water Exchange

  • 14

    Major sources of carbon dioxide in bodies of water

    decomposition, respiration of Aquatic organism

  • 15

    If temperature is high

    fish is active

  • 16

    If temp is low

    fish is inactive

  • 17

    Aeration instruments

    Aspirator , Diffused Air , pond aeration, paddlewheel

  • 18

    Splashing of water

    Aeration

  • 19

    Pumping air or oxygen into the water

    Aeration

  • 20

    Spraying the water into the air

    Aeration

  • 21

    Water exchange

    Salmon cages , Trout raceways , CARP cages , Catfish raceways

  • 22

    What are the water quality parameters?

    Physical factors, Chemical factors

  • 23

    What are the physical factors involved in water quality parameters?

    Temperature , Turbidity

  • 24

    Chemical factors involve underwater quality parameters

    pH , Dissolved oxygen, Carbon dioxide, Total alkalinity, Hardness, Nitrogen or ammonia, Water salinity, Toxic material

  • 25

    Is the most important physical factor for free, survival and growth?

    Water temperature

  • 26

    Most influential parameter in aquatic systems, because of its significant defect on aquatic life, official logical processes and environment

    Water temperature

  • 27

    This is the range of temperature or water temperature where fish growth will be affected or evenly die

    outside Optimum range

  • 28

    What is the temperature range of the metabolic rate of catfish that will do for each 10°C rise?

    0°C – 35°C

  • 29

    This effect applies to almost all cold, blooded, aquatic organisms, including bacteria, zooplankton, insects, and fish

    Q10 factor

  • 30

    It’s very sweet temperature and as a maximum at 3.94°C

    Density

  • 31

    This property leads the thermal stratification of water column in aqua culture ponds, which can impact circulation and oxygen transfer

    Density

  • 32

    Specific heat of water

    4.186 kJ/ kilogram kelvin

  • 33

    It acts as a good hit storage, medium protecting aquatic organisms against large temperature, fluctuations in outdoor culture systems

    Specific heat

  • 34

    Requires large amount of heat for raising the water temperature in controlled environment warm water, aquaculture systems

    Specific heat

  • 35

    It has a high viscosity relative to other liquids, which decreases with increased in temperature

    Water

  • 36

    It affects the sedimentation or sinking rate of plankton in pants, the sedimentation rate of sediments and energy expenditure, by fish or swimming

    Viscosity

  • 37

    What is the maximum temperature applicable only at the water?

    33.94°C or 4°C

  • 38

    The salt content of the dead sea is how many times higher than the normal SEA water

    10 times

  • 39

    It can cause, dissolve, oxygen, and temperature to vary at a different depths in the same system

    Stratification

  • 40

    This is a layer in the water or seawater, where this there is a high temperature and higher dissolved oxygen

    Epilimnion

  • 41

    This is layer in seawater where there is low, dissolved, oxygen, and low temperature

    Hypolimnion

  • 42

    Layer in the sea water, where there is a neutral amount of temperature and dissolved oxygen

    Thermocline

  • 43

    It is the amount of heat required

    Specific heat

  • 44

    It results from suspended solids, or clay or plankton

    Turbidity

  • 45

    Causes of change of water

    Erosion, Runoff, Disturbance of water, Algar growth

  • 46

    What are the effects of turbid?

    Clogs gills in organisms, Increased and temperature, Decrease in dissolve oxygen

  • 47

    It measure the alkalinity or acidity of water

    pH level

  • 48

    Fish production can be greatly affected by excessively low or high

    PH

  • 49

    Suitable pH value for pond fish production at sunrise

    6.5 to 8.5

  • 50

    What is the most suitable pH value for the most cultured fish will die

    Below 4.5

  • 51

    What fertilizers needed to be used if pH level is below 6.5 at sunrise

    Lime and alkaline fertilizers

  • 52

    What kind of fertilizers must be used if the pH level is above 8.5 at sunrise

    Acid fertilizers

  • 53

    How many times does the pond must be dried up after each harvest before refilling and restocking

    At least two weeks

  • 54

    What must be applied to the pond after each harvest

    Agricultural limestone

  • 55

    It is the most important gas dissolve in water

    Dissolved oxygen

  • 56

    Essential for respiration and decomposition

    dissolved oxygen

  • 57

    It diffuses and dissolves into the water

    Atmospheric oxygen

  • 58

    It is the major source of dissolve, oxygen in ponds

    Photosynthesis of microscopic plants

  • 59

    Are the main activities taking place at night which reduces the DO content until sunrise

    Respiration and decomposition

  • 60

    Oxygen transferred to water using mechanical or gravity, aerators, and your oxygen injection

    Mechanical aeration

  • 61

    Dissolve oxygen levels should be maintained at saturation or what ppm to obtain good growth of fish, cultured

    At least 5 ppm

  • 62

    Aquacrop uses up all the oxygen

    Overstocking

  • 63

    Limited photosynthesis on cloudy days

    weather

  • 64

    Lowest oxygen levels in hot weather just before sunrise

    Time of the day

  • 65

    And eat food will consume oxygen

    Decay of feed

  • 66

    Aqua crab uses more oxygen

    Feeding activity

  • 67

    Trash, fish, and pest use oxygen

    Competition

  • 68

    Dead weeds leaves grasses uses up oxygen

    Dickie vegetation

  • 69

    The saltier, the water, the less oxygen it can hold

    Salinity

  • 70

    When aeration devices fail

    Equipment failure

  • 71

    Primary cost is mixing of water with very different temperatures

    Super saturation

  • 72

    Can be caused by excessive aeration or photosynthesis and can cause gas bubble disease

    Super saturation

  • 73

    Concentration wear fish can tolerate provided dissolve oxygen concentrations are high

    10 PPM

  • 74

    What are supporting good fish populations in concentrations of

    Less than 5PPM

  • 75

    Ammonia can cause damage at levels of only

    0.1 ppm

  • 76

    It is the maintaining internal balance of salt and water in the fish body

    Osmoregulation

  • 77

    It is commonly found in water used for photosynthesis of plants or in water, sources originating from limestone bearing wrap

    Carbon dioxide

  • 78

    It measures the unionize and ionized forms of ammonia present in the aqua culture system

    Total ammonia, nitrogen, or tan

  • 79

    They are harmless, and they’re not toxic to fish except in high levels, and can dissipate into the atmosphere easily

    ionized ammonia?

  • 80

    Present, if the pH level is below seven

    ionized ammonia

  • 81

    It can be reduced through periodic water changes

    ionized ammonia

  • 82

    Can be extremely toxic to fish and present if the pH level is above seven

    unionized ammonia

  • 83

    It was found out to be directly correlated with temperature and pH

    Toxicity

  • 84

    It increases as the temperature and pH increases

    unionized ammonia

  • 85

    It has concentration levels below 0.02 parts per million that are considered safe

    unionized ammonia

  • 86

    The level of NH three can be reduced and be converted into harmless nitrates through biological processes, known as

    Nitrogen cycle

  • 87

    As ammonia is excluded, it is converted by bacteria, called

    Nitrosomonas

  • 88

    As ammonia acquitted, converted by bacteria to another compound, called

    Nitrate

  • 89

    It converts nitrate to nitrate, which is not toxic to fish, except at extremely high levels, and can be considered harmless

    nitrobacter

  • 90

    It is used by plants including algae for food then fish shouldn’t take in the plants for food. Some of the nutrients needed beneficial can be supplied by the consumed.

    Nitrate

  • 91

    What are the nitrifying bacteria?

    nitroSomonas and nitrobacter

  • 92

    Nitrifying bacteria, utilize what gas to convert ammonia and nitrate into the nontoxic by product

    Oxygen

  • 93

    They utilize oxygen to convert ammonia and nitrite into the nontoxic by product

    Nitrifying bacteria

  • 94

    This are cycling nitrification, biological cycle, start up cycle break and cycle

    Nitrogen cycle

  • 95

    It is the sum of the carbonate and bicarbonate alkalinites

    Total alkalinity

  • 96

    It directly affect, fish, body metabolism, especially the osmo regulation process

    Total alkalinity

  • 97

    It is a process of maintaining an internal balance of salt and water in a fish body

    osmoregulation

  • 98

    It can prevent excessive buildup of carbon dioxide and lethal decreases in pH

    Buffering capacity

  • 99

    Are storage area for surplus carbon dioxide by storing carbon dioxide. The buffering system prevents wide pH Fluctuations

    carbonates and bicarbonates

  • 100

    What should be added for water supplies that have naturally low alkalinity to increase the buffering capacity of the water?

    Agricultural line

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    問題一覧

  • 1

    When the salt content in it is less than 0.5 PPT

    Freshwater

  • 2

    It is the mixture of freshwater and salt water with the salt content ranging from 0.50 to 30 PPT

    Brackish Water

  • 3

    When the salt content is more than 30–35PPT

    Matine Water

  • 4

    It is the most important factor, influencing, fish, health, performance, and productivity

    Water Quality

  • 5

    What are some water quality factors?

    Source , During Culture , Discharge

  • 6

    States some source or origin of water

    underground , surface

  • 7

    What is the key to the successful culture of aquatic organisms?

    Maintenance of the water quality

  • 8

    Bluewater quality equates to

    Poor harvest

  • 9

    Water quality issues should be taken into account at every point of the agriculture accordinb to

    Dr. Claude E. Boyd

  • 10

    Source of water in terms of quality

    Red ride , Pasture, underground , forested, populated, unpopulated

  • 11

    During culture

    Fertile water, clear water , turbid water

  • 12

    Discharge

    Shrimp pond , catfish pond

  • 13

    Factors that influence, water quality

    photosynthesis/respiration, Water temperature, Fertilization , Feeds , Aeration , Water Exchange

  • 14

    Major sources of carbon dioxide in bodies of water

    decomposition, respiration of Aquatic organism

  • 15

    If temperature is high

    fish is active

  • 16

    If temp is low

    fish is inactive

  • 17

    Aeration instruments

    Aspirator , Diffused Air , pond aeration, paddlewheel

  • 18

    Splashing of water

    Aeration

  • 19

    Pumping air or oxygen into the water

    Aeration

  • 20

    Spraying the water into the air

    Aeration

  • 21

    Water exchange

    Salmon cages , Trout raceways , CARP cages , Catfish raceways

  • 22

    What are the water quality parameters?

    Physical factors, Chemical factors

  • 23

    What are the physical factors involved in water quality parameters?

    Temperature , Turbidity

  • 24

    Chemical factors involve underwater quality parameters

    pH , Dissolved oxygen, Carbon dioxide, Total alkalinity, Hardness, Nitrogen or ammonia, Water salinity, Toxic material

  • 25

    Is the most important physical factor for free, survival and growth?

    Water temperature

  • 26

    Most influential parameter in aquatic systems, because of its significant defect on aquatic life, official logical processes and environment

    Water temperature

  • 27

    This is the range of temperature or water temperature where fish growth will be affected or evenly die

    outside Optimum range

  • 28

    What is the temperature range of the metabolic rate of catfish that will do for each 10°C rise?

    0°C – 35°C

  • 29

    This effect applies to almost all cold, blooded, aquatic organisms, including bacteria, zooplankton, insects, and fish

    Q10 factor

  • 30

    It’s very sweet temperature and as a maximum at 3.94°C

    Density

  • 31

    This property leads the thermal stratification of water column in aqua culture ponds, which can impact circulation and oxygen transfer

    Density

  • 32

    Specific heat of water

    4.186 kJ/ kilogram kelvin

  • 33

    It acts as a good hit storage, medium protecting aquatic organisms against large temperature, fluctuations in outdoor culture systems

    Specific heat

  • 34

    Requires large amount of heat for raising the water temperature in controlled environment warm water, aquaculture systems

    Specific heat

  • 35

    It has a high viscosity relative to other liquids, which decreases with increased in temperature

    Water

  • 36

    It affects the sedimentation or sinking rate of plankton in pants, the sedimentation rate of sediments and energy expenditure, by fish or swimming

    Viscosity

  • 37

    What is the maximum temperature applicable only at the water?

    33.94°C or 4°C

  • 38

    The salt content of the dead sea is how many times higher than the normal SEA water

    10 times

  • 39

    It can cause, dissolve, oxygen, and temperature to vary at a different depths in the same system

    Stratification

  • 40

    This is a layer in the water or seawater, where this there is a high temperature and higher dissolved oxygen

    Epilimnion

  • 41

    This is layer in seawater where there is low, dissolved, oxygen, and low temperature

    Hypolimnion

  • 42

    Layer in the sea water, where there is a neutral amount of temperature and dissolved oxygen

    Thermocline

  • 43

    It is the amount of heat required

    Specific heat

  • 44

    It results from suspended solids, or clay or plankton

    Turbidity

  • 45

    Causes of change of water

    Erosion, Runoff, Disturbance of water, Algar growth

  • 46

    What are the effects of turbid?

    Clogs gills in organisms, Increased and temperature, Decrease in dissolve oxygen

  • 47

    It measure the alkalinity or acidity of water

    pH level

  • 48

    Fish production can be greatly affected by excessively low or high

    PH

  • 49

    Suitable pH value for pond fish production at sunrise

    6.5 to 8.5

  • 50

    What is the most suitable pH value for the most cultured fish will die

    Below 4.5

  • 51

    What fertilizers needed to be used if pH level is below 6.5 at sunrise

    Lime and alkaline fertilizers

  • 52

    What kind of fertilizers must be used if the pH level is above 8.5 at sunrise

    Acid fertilizers

  • 53

    How many times does the pond must be dried up after each harvest before refilling and restocking

    At least two weeks

  • 54

    What must be applied to the pond after each harvest

    Agricultural limestone

  • 55

    It is the most important gas dissolve in water

    Dissolved oxygen

  • 56

    Essential for respiration and decomposition

    dissolved oxygen

  • 57

    It diffuses and dissolves into the water

    Atmospheric oxygen

  • 58

    It is the major source of dissolve, oxygen in ponds

    Photosynthesis of microscopic plants

  • 59

    Are the main activities taking place at night which reduces the DO content until sunrise

    Respiration and decomposition

  • 60

    Oxygen transferred to water using mechanical or gravity, aerators, and your oxygen injection

    Mechanical aeration

  • 61

    Dissolve oxygen levels should be maintained at saturation or what ppm to obtain good growth of fish, cultured

    At least 5 ppm

  • 62

    Aquacrop uses up all the oxygen

    Overstocking

  • 63

    Limited photosynthesis on cloudy days

    weather

  • 64

    Lowest oxygen levels in hot weather just before sunrise

    Time of the day

  • 65

    And eat food will consume oxygen

    Decay of feed

  • 66

    Aqua crab uses more oxygen

    Feeding activity

  • 67

    Trash, fish, and pest use oxygen

    Competition

  • 68

    Dead weeds leaves grasses uses up oxygen

    Dickie vegetation

  • 69

    The saltier, the water, the less oxygen it can hold

    Salinity

  • 70

    When aeration devices fail

    Equipment failure

  • 71

    Primary cost is mixing of water with very different temperatures

    Super saturation

  • 72

    Can be caused by excessive aeration or photosynthesis and can cause gas bubble disease

    Super saturation

  • 73

    Concentration wear fish can tolerate provided dissolve oxygen concentrations are high

    10 PPM

  • 74

    What are supporting good fish populations in concentrations of

    Less than 5PPM

  • 75

    Ammonia can cause damage at levels of only

    0.1 ppm

  • 76

    It is the maintaining internal balance of salt and water in the fish body

    Osmoregulation

  • 77

    It is commonly found in water used for photosynthesis of plants or in water, sources originating from limestone bearing wrap

    Carbon dioxide

  • 78

    It measures the unionize and ionized forms of ammonia present in the aqua culture system

    Total ammonia, nitrogen, or tan

  • 79

    They are harmless, and they’re not toxic to fish except in high levels, and can dissipate into the atmosphere easily

    ionized ammonia?

  • 80

    Present, if the pH level is below seven

    ionized ammonia

  • 81

    It can be reduced through periodic water changes

    ionized ammonia

  • 82

    Can be extremely toxic to fish and present if the pH level is above seven

    unionized ammonia

  • 83

    It was found out to be directly correlated with temperature and pH

    Toxicity

  • 84

    It increases as the temperature and pH increases

    unionized ammonia

  • 85

    It has concentration levels below 0.02 parts per million that are considered safe

    unionized ammonia

  • 86

    The level of NH three can be reduced and be converted into harmless nitrates through biological processes, known as

    Nitrogen cycle

  • 87

    As ammonia is excluded, it is converted by bacteria, called

    Nitrosomonas

  • 88

    As ammonia acquitted, converted by bacteria to another compound, called

    Nitrate

  • 89

    It converts nitrate to nitrate, which is not toxic to fish, except at extremely high levels, and can be considered harmless

    nitrobacter

  • 90

    It is used by plants including algae for food then fish shouldn’t take in the plants for food. Some of the nutrients needed beneficial can be supplied by the consumed.

    Nitrate

  • 91

    What are the nitrifying bacteria?

    nitroSomonas and nitrobacter

  • 92

    Nitrifying bacteria, utilize what gas to convert ammonia and nitrate into the nontoxic by product

    Oxygen

  • 93

    They utilize oxygen to convert ammonia and nitrite into the nontoxic by product

    Nitrifying bacteria

  • 94

    This are cycling nitrification, biological cycle, start up cycle break and cycle

    Nitrogen cycle

  • 95

    It is the sum of the carbonate and bicarbonate alkalinites

    Total alkalinity

  • 96

    It directly affect, fish, body metabolism, especially the osmo regulation process

    Total alkalinity

  • 97

    It is a process of maintaining an internal balance of salt and water in a fish body

    osmoregulation

  • 98

    It can prevent excessive buildup of carbon dioxide and lethal decreases in pH

    Buffering capacity

  • 99

    Are storage area for surplus carbon dioxide by storing carbon dioxide. The buffering system prevents wide pH Fluctuations

    carbonates and bicarbonates

  • 100

    What should be added for water supplies that have naturally low alkalinity to increase the buffering capacity of the water?

    Agricultural line