Podcast
Questions and Answers
What is the origin of Nile tilapia?
What is the origin of Nile tilapia?
- Africa (correct)
- Asia
- Europe
- South America
In how many countries is Nile tilapia produced?
In how many countries is Nile tilapia produced?
- More than 100 (correct)
- Around 75
- Less than 50
- Around 150
What is the preferred land elevation for freshwater ponds?
What is the preferred land elevation for freshwater ponds?
- Flat areas for easy construction
- Low-lying areas for easy access to water
- Areas near rivers for natural drainage
- Elevated areas to avoid floods (correct)
What type of soil is preferred for freshwater ponds?
What type of soil is preferred for freshwater ponds?
What is the ideal pH range of the soil for freshwater pond site selection?
What is the ideal pH range of the soil for freshwater pond site selection?
What is the main factor for successful fish culture in terms of water source?
What is the main factor for successful fish culture in terms of water source?
What are the sources of water suitable for fish culture?
What are the sources of water suitable for fish culture?
What is a key consideration for site selection in tilapia culture?
What is a key consideration for site selection in tilapia culture?
What is the first step in the process of tilapia culture/business?
What is the first step in the process of tilapia culture/business?
What is the process to determine the suitability of soil for pond construction?
What is the process to determine the suitability of soil for pond construction?
What is the feeding rate in grams per day for 50,000 fish with an average body weight of 5 grams each?
What is the feeding rate in grams per day for 50,000 fish with an average body weight of 5 grams each?
What is the lethal level of ammonia in milligrams per liter?
What is the lethal level of ammonia in milligrams per liter?
What is the recommended dissolved oxygen level in milligrams per liter?
What is the recommended dissolved oxygen level in milligrams per liter?
What temperature range is suitable for the pond environment?
What temperature range is suitable for the pond environment?
What is the stocking density in fish per square meter?
What is the stocking density in fish per square meter?
What is the lethal level of carbon dioxide concentration in milligrams per liter?
What is the lethal level of carbon dioxide concentration in milligrams per liter?
What is the recommended salinity range in parts per thousand (ppt)?
What is the recommended salinity range in parts per thousand (ppt)?
What is the recommended pH range for the pond environment?
What is the recommended pH range for the pond environment?
What is the size of the pond in square meters?
What is the size of the pond in square meters?
What is the size of the pond in hectares?
What is the size of the pond in hectares?
What is the recommended range for pond depth in tilapia fish farming?
What is the recommended range for pond depth in tilapia fish farming?
What is used for drainage in the ponds?
What is used for drainage in the ponds?
What percentage of production costs is attributed to feed cost in tilapia fish farming?
What percentage of production costs is attributed to feed cost in tilapia fish farming?
What are the three methods of fish culture used in tilapia fish farming?
What are the three methods of fish culture used in tilapia fish farming?
What is essential to make sub-surface nutrients available for the growth of fish food in the pond?
What is essential to make sub-surface nutrients available for the growth of fish food in the pond?
What is used to correct soil acidity in tilapia fish farming?
What is used to correct soil acidity in tilapia fish farming?
Where can sources of fingerlings be obtained for tilapia fish farming?
Where can sources of fingerlings be obtained for tilapia fish farming?
What is the feeding period for tilapia fish farming?
What is the feeding period for tilapia fish farming?
What type of slopes are recommended for rectangular or square ponds in tilapia fish farming?
What type of slopes are recommended for rectangular or square ponds in tilapia fish farming?
How long should drainage take in the ponds for tilapia fish farming?
How long should drainage take in the ponds for tilapia fish farming?
What is the main method of capture in tangle nets?
What is the main method of capture in tangle nets?
Which material is NOT classified under natural fibres for fishing gear?
Which material is NOT classified under natural fibres for fishing gear?
What is the main purpose of fish pumps?
What is the main purpose of fish pumps?
Which net is mainly used for catching pelagic fish?
Which net is mainly used for catching pelagic fish?
Which gear is used for catching Bombay duck in India?
Which gear is used for catching Bombay duck in India?
What type of water is the Bandal gear used in?
What type of water is the Bandal gear used in?
Which gear is used for catching mackerel?
Which gear is used for catching mackerel?
Which gear is used for catching prawns and catfishes?
Which gear is used for catching prawns and catfishes?
Which gear is mainly used for catching mollusca snails?
Which gear is mainly used for catching mollusca snails?
Which gear is used for catching tuna fish?
Which gear is used for catching tuna fish?
What are the two main categories of fishing gears based on the method of operation?
What are the two main categories of fishing gears based on the method of operation?
Which classification system is based on particular technical features of the fishing gear?
Which classification system is based on particular technical features of the fishing gear?
What is the working platform to conduct fishing operations called?
What is the working platform to conduct fishing operations called?
Which type of gear requires large power and is operated by mechanized boats?
Which type of gear requires large power and is operated by mechanized boats?
What are examples of passive gears?
What are examples of passive gears?
Which classification system is based on the technical features of the gear?
Which classification system is based on the technical features of the gear?
What is the term for the equipments used in fishing?
What is the term for the equipments used in fishing?
Which type of gear is operated by non-mechanized boats?
Which type of gear is operated by non-mechanized boats?
What are examples of active gears?
What are examples of active gears?
What is the term for the platform used to reach the fishing ground and conduct fishing operations?
What is the term for the platform used to reach the fishing ground and conduct fishing operations?
Which classification system is accepted by the FAO?
Which classification system is accepted by the FAO?
What type of gear employs implements like spears, clamps, and tongs for catching fish?
What type of gear employs implements like spears, clamps, and tongs for catching fish?
Which gear is used to mechanically, chemically, or electrically stupefy fish for ease of capture?
Which gear is used to mechanically, chemically, or electrically stupefy fish for ease of capture?
What method involves using hooks, lines, baits, and different types of lines like hand line, set line, drift line, and troll line?
What method involves using hooks, lines, baits, and different types of lines like hand line, set line, drift line, and troll line?
Which type of net is circular in shape and used for fishing by throwing or casting?
Which type of net is circular in shape and used for fishing by throwing or casting?
What type of nets hang vertically in the water with floats at the top and weights at the bottom edge, used for encircling fish?
What type of nets hang vertically in the water with floats at the top and weights at the bottom edge, used for encircling fish?
Which gear requires engine-propelled boats for operation and includes dredges, sweep trawls, bottom trawls, and mid-water trawls?
Which gear requires engine-propelled boats for operation and includes dredges, sweep trawls, bottom trawls, and mid-water trawls?
Which type of nets employ long walls of webbing hung vertically in the water and can be set gill nets, drift gill nets, or encircling gears?
Which type of nets employ long walls of webbing hung vertically in the water and can be set gill nets, drift gill nets, or encircling gears?
What gear surrounds fish from the side and bottom and includes lamparas nets, ring nets, and purse seines?
What gear surrounds fish from the side and bottom and includes lamparas nets, ring nets, and purse seines?
Which type of gill nets are set in water by means of anchors?
Which type of gill nets are set in water by means of anchors?
Flashcards
Electricity for Tilapia Farming
Electricity for Tilapia Farming
Ensures the fish farming operation can run continuously.
Pond Construction Method
Pond Construction Method
Excavation to create a holding area for the fish
Ideal Pond Depth
Ideal Pond Depth
- 5m-1m (shallow) to 1.5m-2.0m (drain end)
Ideal Pond Shape & Slope
Ideal Pond Shape & Slope
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Gate Valves and Stand Pipes
Gate Valves and Stand Pipes
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Water Supply Lines
Water Supply Lines
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Pond Bottom Cultivation
Pond Bottom Cultivation
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Leaching and Liming
Leaching and Liming
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Pond Fertilization
Pond Fertilization
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Methods for Fish Culture
Methods for Fish Culture
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Sources of Fingerlings
Sources of Fingerlings
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Tilapia Feeding Period
Tilapia Feeding Period
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ISSCFG Meaning
ISSCFG Meaning
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Andres Von Brandt
Andres Von Brandt
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Grappling and Wounding Gear
Grappling and Wounding Gear
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Stupefying Devices
Stupefying Devices
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Hook and Line Fishing
Hook and Line Fishing
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Fish Traps
Fish Traps
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Dragged Gear
Dragged Gear
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Cast Nets
Cast Nets
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Seine Nets
Seine Nets
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Surrounding Nets
Surrounding Nets
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Gill Nets
Gill Nets
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Gill Net Types
Gill Net Types
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Set Gill Nets
Set Gill Nets
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Catching Method: Grappling
Catching Method: Grappling
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Catching Method: Hook and Line
Catching Method: Hook and Line
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Catching Method: Gill Nets
Catching Method: Gill Nets
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Catching Method: Surrounding Net
Catching Method: Surrounding Net
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Catching Method: Stupefying Devices
Catching Method: Stupefying Devices
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Study Notes
Tilapia Fish Farming: Key Steps and Considerations
- Reliable source of electricity is available in the area for the fish farming operation
- Pond construction involves digging into the ground using a backhoe
- Pond depth should range from 0.5m to 1m at the shallow end, sloping to 1.5m to 2.0m at the drain end
- Ponds can be rectangular or square in shape with 2:1 or 3:1 slopes on all sides
- Gate valves and stand pipes are used for drainage, which should not take more than 3 days
- Water supply lines should be sufficient to fill each pond within three days
- Cultivation of the pond bottom is essential to make sub-surface nutrients available for the growth of fish food
- Soil acidity limits the production of natural fish food, and methods like leaching and liming are used to correct acidity
- Pond fertilization is done to stimulate primary productivity, inducing the growth of natural food
- Three methods of fish culture are used: extensive, semi-intensive, and intensive
- Sources of fingerlings include freshwater aquaculture centers and genetically enhanced strains
- Feeding period involves supplemental feeds, with 60-70% of production costs attributed to feed cost; feeding is done twice a day at varying rates depending on fish size
Classification of Fishing Gears and Methods
- The International Standard Statistical Classification of Fishing Gears (ISSCFG) is accepted by the FAO.
- Andres Von Brandt classified fish catching methods into 16 major groups.
- Grappling and wounding gear employs implements like spears, clamps, tongs, and bows for catching fish.
- Stupefying devices are used to mechanically, chemically, or electrically stupefy fish for ease of capture.
- Hook and line fishing involves using hooks, lines, baits, and different types of lines like hand line, set line, drift line, and troll line.
- Fish traps like basket traps, verandah nets, and scoop nets are used to catch specific fish species.
- Dragged gear includes dredges, sweep trawls, bottom trawls, and mid-water trawls that require engine-propelled boats for operation.
- Cast nets are circular in shape and used for fishing by throwing or casting.
- Seine nets hang vertically in the water with floats at the top and weights at the bottom edge, used for encircling fish.
- Surrounding nets include lamparas nets, ring nets, and purse seines, which surround fish from the side and bottom.
- Gill nets employ long walls of webbing hung vertically in the water and can be set gill nets, drift gill nets, or encircling gears.
- Set gill nets are set in water by means of anchors.
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