Aquaculture Basics and Techniques

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Questions and Answers

What is the primary purpose of aquaculture?

To cultivate aquatic organisms under controlled conditions (correct)

To prevent the extinction of aquatic species

To explore new aquatic environments

To harvest wild fish from natural habitats

Which of the following is NOT a method included in aquaculture?

Cage farming

Recirculating aquaculture systems

Pond systems

Wild fishing (correct)

What characterizes freshwater as it relates to aquaculture?

Water that is unsuitable for fish farming

Low concentrations of dissolved salts (correct)

Water found in oceans

High concentrations of dissolved salts

Why would a species be chosen for aquaculture?

Its adaptability to different farming conditions Signup and view all the answers

What is a fish farm primarily used for?

Commercial breeding and harvesting of fish Signup and view all the answers

What term is used in Indonesian for 'aquaculture'?

Budidaya perikanan Signup and view all the answers

Which environments can aquaculture be practiced in?

Freshwater, saltwater, or brackish water Signup and view all the answers

Which is the correct translation for 'fish farming' in Indonesian?

Peternakan ikan Signup and view all the answers

What is the primary purpose of a trawl in fishing?

To catch fish and marine organisms Signup and view all the answers

Which of the following fish species is typically caught using longline fishing?

Tuna Signup and view all the answers

What is the function of a buoy in maritime activities?

To mark navigation routes and indicate hazards Signup and view all the answers

What is a net cage primarily used for in aquaculture?

Raising fish and other aquatic organisms Signup and view all the answers

What does the term 'stocking' refer to in fisheries?

Introducing fish to a specific water body Signup and view all the answers

During which type of trawling is the net dragged along the bottom of the ocean?

Bottom trawling Signup and view all the answers

Which method incorporates a long main line with multiple baited hooks?

Longline fishing Signup and view all the answers

Which of the following most accurately describes aquaculture cages?

Enclosures for raising aquatic organisms Signup and view all the answers

What is the primary purpose of spawning in aquaculture?

To fertilize eggs and produce larvae Signup and view all the answers

What stage of fish is referred to as fry?

The juvenile stage after hatching Signup and view all the answers

Which of the following best describes a pond in aquaculture?

A controlled body of water for raising aquatic organisms Signup and view all the answers

What is cage culture primarily used for?

Raising species that require more space for growth Signup and view all the answers

In which environments is cage culture typically practiced?

In floating or submerged enclosures within natural water bodies Signup and view all the answers

Which of the following statements about fry is false?

Fry rely on yolk sacs for nutrition. Signup and view all the answers

What is not a characteristic of a pond used in aquaculture?

Only for breeding purposes Signup and view all the answers

What does the term 'pemijahan' refer to in aquaculture?

The spawning process of fish Signup and view all the answers

What is the role of nitrite (NO₂⁻) in aquatic systems?

It can be toxic to aquatic organisms, particularly fish. Signup and view all the answers

What is the purpose of an aerator in aquaculture?

To increase the oxygen content in water. Signup and view all the answers

How does a biofilter contribute to water quality in aquaculture?

By promoting the growth of beneficial bacteria to convert harmful substances. Signup and view all the answers

What process converts ammonia (NH₃) to nitrate (NO₃⁻)?

Nitrification Signup and view all the answers

What is the main function of filtration in aquaculture?

To remove harmful substances and debris from water. Signup and view all the answers

Which of the following components is essential for mitigating ammonia toxicity in aquatic systems?

Biofilters Signup and view all the answers

What is the primary benefit of using an aerator in fish farming?

It helps maintain sufficient oxygen levels for fish health. Signup and view all the answers

Which statement is true regarding nitrite in the nitrogen cycle?

Nitrite forms when ammonia undergoes nitrification. Signup and view all the answers

What is a parasite?

An organism that lives on or inside another organism and harms the host Signup and view all the answers

What is the primary function of a vaccine?

To provide active acquired immunity against infectious diseases Signup and view all the answers

What does biosecurity measures aim to achieve?

To prevent exposure to pathogens and toxins Signup and view all the answers

What is the purpose of quarantine?

To isolate individuals to prevent the spread of contagious diseases Signup and view all the answers

Feeding frequency has a significant impact on what aspect of health?

Health and growth of the animal or human Signup and view all the answers

How is feed conversion ratio (FCR) defined?

The amount of feed consumed divided by the body weight gained Signup and view all the answers

What does water exchange refer to in aquaculture?

Replacing or renewing the water in a system Signup and view all the answers

Which of the following best describes biosecurity practices?

Measures to ensure safety from biological hazards Signup and view all the answers

Study Notes

Aquaculture

Aquaculture is the cultivation of fish, crustaceans, mollusks, and aquatic plants under controlled conditions
Traditional fishing involves harvesting wild fish from their natural habitats

Aquaculture Methods

Aquaculture can be done in freshwater or saltwater environments
Aquaculture techniques include pond systems, cage farming, and recirculating aquaculture systems (RAS)

Species in Aquaculture

Species cultivated depend on factors like environment, market demand, and suitability for farming conditions

Fish Farms

A fish farm is a controlled environment where fish are bred, raised, and harvested for commercial purposes.
Fish farming is a key component of aquaculture.

Freshwater

Freshwater is water with low concentrations of dissolved salts, typically found in rivers, lakes, and reservoirs
Freshwater is used extensively in aquaculture

Spawning

Spawning is the reproductive process in fish and other aquatic organisms.
Eggs and sperm are released for fertilization.
Impacts production of larvae and fingerlings for cultivation.

Fry

Fry are early juvenile stage of fish
Fry have recently hatched from eggs.
They have transitioned from the larval stage (dependent on yolk sacs for nutrition) to feeding on external food sources.

Ponds

Ponds are controlled bodies of water used for aquaculture
Ponds are a common and traditional method of cultivating fish, shrimp, and other aquatic organisms.
Ponds vary in size, depth, and design based on species being farmed and farming practices used.

Cage Culture

Cage culture refers to aquaculture where fish and aquatic organisms are raised in floating or submerged enclosures (cages or nets) within natural water bodies
This method is effective for species that require more space for growth.
Cage culture allows for efficient use of aquatic resources.

Ammonia Levels

Managing ammonia levels is critical for maintaining water quality.
Ensures the health of cultured species.

Nitrite

Nitrite (NO₂⁻) is a nitrogen compound that can be toxic to aquatic organisms.
Nitrite is an intermediate product in the nitrogen cycle.
Formed when ammonia (NH₃) is converted to nitrate (NO₃⁻) through nitrification.

Aerators

Aerators are devices used in aquaculture to increase the oxygen content in water.
Aerators play a crucial role in maintaining water quality
Aerators ensure the health of fish and other aquatic organisms.

Filtration

Filtration is a process in aquaculture involving the removal of suspended solids, debris, and harmful substances from water to maintain optimal water quality
Proper filtration helps create a healthy environment for fish and other aquatic organisms.

Biofilters

Biofilters are specialized filtration systems that promote the growth of beneficial bacteria to convert harmful substances into less toxic forms.
Biofilters are essential for maintaining water quality in fish farming and other aquatic environments.

Parasites

Parasites are organisms that live on or inside another organism (the host) and benefit at the host's expense.

Vaccines

Vaccines provide active acquired immunity to a particular infectious disease.

Biosecurity

Biosecurity refers to practices and measures taken to prevent the unintentional exposure to pathogens and toxins.
Biosecurity ensures the safety of individuals, the environment, and the community from biological hazards.

Quarantine

Quarantine involves the isolation of individuals or groups who may have been exposed to a contagious disease to prevent its spread.

Feeding Frequency

Feeding frequency refers to how often an animal is fed, which impacts its health and growth.

Feed Conversion Ratio

The Feed Conversion Ratio (FCR) measures the efficiency with which animals convert feed into body weight.

Water Exchange

Water exchange refers to the process of replacing or renewing the water in aquaculture tanks, aquariums, or other water bodies.

Trawling

Trawling involves dragging a net through the water to catch fish and other marine organisms.
Bottom trawling drags the net along the bottom of the sea floor.
Mid-water trawling drags the net in the middle of the water column.

Longline Fishing

Longline fishing involves deploying a long main line (backbone) with multiple baited hooks attached.
This technique is used to catch various fish species, including tuna, swordfish, and halibut.

Buoys

Buoys are floating devices anchored in water.
Buoys are typically used to mark navigation routes, indicate hazards, or serve various purposes in maritime activities.

Net Cages

Net cages (fish cages or aquaculture cages) are enclosures used in aquaculture to raise fish and other aquatic organisms in open water.
Net cages provide controlled farming while allowing fish access to natural water sources.

Stocking

Stocking refers to the practice of introducing fish or other aquatic organisms into a water body or controlled environment.
Stocking purposes include fish farming, habitat restoration, and recreational fishing.

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Description

This quiz covers key concepts of aquaculture, including various farming methods, species cultivated, and the significance of fish farms. Test your knowledge on freshwater environments and spawning processes essential for aquatic life cultivation.