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Questions and Answers
What is the farming of fish and other aquatic organisms in controlled environments called?
What is the farming of fish and other aquatic organisms in controlled environments called?
- Mariculture
- Aquaculture (correct)
- Silviculture
- Hydroponics
What is the most valuable aquaculture species produced in Australia?
What is the most valuable aquaculture species produced in Australia?
- Tuna
- Salmonids (correct)
- Oysters
- Barramundi
Which of the following products is the primary use for aquaculture species?
Which of the following products is the primary use for aquaculture species?
- Fertilizers
- Beauty products
- Human consumption (correct)
- Textile manufacturing
What is the term for juvenile fish that are reared until they are ready to be stocked?
What is the term for juvenile fish that are reared until they are ready to be stocked?
Which of these species is NOT commonly farmed in aquaculture?
Which of these species is NOT commonly farmed in aquaculture?
Which system in aquaculture involves high levels of environmental control and high stocking rates?
Which system in aquaculture involves high levels of environmental control and high stocking rates?
What is a key advantage of using artificial feed over natural feed in aquaculture?
What is a key advantage of using artificial feed over natural feed in aquaculture?
What is the role of the gills in fish?
What is the role of the gills in fish?
Why is maintaining good water quality important in aquaculture systems?
Why is maintaining good water quality important in aquaculture systems?
Which of the following is a pest control method used in aquaculture?
Which of the following is a pest control method used in aquaculture?
What are the main components of fish meal used in aquaculture feeds?
What are the main components of fish meal used in aquaculture feeds?
Which environmental factor is crucial to monitor in intensive aquaculture systems to prevent stock losses?
Which environmental factor is crucial to monitor in intensive aquaculture systems to prevent stock losses?
What is the primary market for high-end Australian aquaculture products?
What is the primary market for high-end Australian aquaculture products?
What can lead to water quality issues in aquaculture systems?
What can lead to water quality issues in aquaculture systems?
Which aquaculture species is often raised in ponds in Australia?
Which aquaculture species is often raised in ponds in Australia?
Which aquaculture system is less labor-intensive and relies more on natural conditions?
Which aquaculture system is less labor-intensive and relies more on natural conditions?
What is one method of reducing predator risk in aquaculture systems?
What is one method of reducing predator risk in aquaculture systems?
Which factor is most critical for ensuring fast growth in aquaculture systems?
Which factor is most critical for ensuring fast growth in aquaculture systems?
What is a major reason for using artificial feeds over natural feeds in aquaculture?
What is a major reason for using artificial feeds over natural feeds in aquaculture?
Why is controlling water salinity important in aquaculture?
Why is controlling water salinity important in aquaculture?
Which of the following is a key biosecurity measure on aquaculture farms?
Which of the following is a key biosecurity measure on aquaculture farms?
What is the benefit of aquaculture to wild fisheries?
What is the benefit of aquaculture to wild fisheries?
What does 'stocking density' refer to in aquaculture?
What does 'stocking density' refer to in aquaculture?
Which species is known to change gender as it grows?
Which species is known to change gender as it grows?
What is a critical sign of low oxygen levels in aquaculture ponds?
What is a critical sign of low oxygen levels in aquaculture ponds?
Why are barramundi often raised in recirculation systems in Australia?
Why are barramundi often raised in recirculation systems in Australia?
What is the main reason for purging yabbies before harvest?
What is the main reason for purging yabbies before harvest?
Which aquaculture species is primarily grown for pearls in Australia?
Which aquaculture species is primarily grown for pearls in Australia?
Which species of fish is commonly grown in New Zealand's aquaculture industry?
Which species of fish is commonly grown in New Zealand's aquaculture industry?
What is a common method for harvesting barramundi in aquaculture systems?
What is a common method for harvesting barramundi in aquaculture systems?
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Study Notes
Aquaculture Overview
- Aquaculture is the farming of fish and other aquatic organisms in controlled environments.
- The most valuable aquaculture species in Australia are salmonids, known for their extensive market demand.
Aquaculture Products
- The primary use for species produced in aquaculture is human consumption.
- Fingerlings refer to juvenile fish reared until they are ready for stocking.
Commonly Farmed Species
- Species commonly farmed in aquaculture include barramundi, pearl oysters, and yabbies.
- Swordfish is not typically farmed in aquaculture operations.
Aquaculture Systems
- Intensive aquaculture systems maintain high levels of environmental control and stocking rates.
- Extensive systems are less labor-intensive, relying more on natural conditions.
Nutrition and Feeding
- One key advantage of artificial feed is reliable nutrition, which is essential for healthy fish growth.
- Fish meal in aquaculture feeds primarily consists of wild-caught small fish.
Water Quality and Management
- Good water quality is crucial for ensuring healthy stock and meeting market specifications.
- Monitoring dissolved oxygen levels is vital in intensive aquaculture to prevent stock losses.
- Excess feed and waste build-up can create significant water quality issues.
Market Dynamics
- The primary market for high-end Australian aquaculture products is the export market.
- Controlling water salinity is important as it directly affects fish health and growth.
Biosecurity and Stock Management
- Key biosecurity measures include quarantining new stock to prevent disease transmission.
- Reducing pressure on wild fisheries is a significant benefit of aquaculture.
Stocking Density and Growth
- Stocking density refers to the number of fish per unit area, affecting growth rates and health.
- Optimal water temperature is most critical for ensuring fast growth in aquaculture systems.
Species Behavior and Harvesting
- Oysters are known to change gender as they grow, demonstrating unique biological traits.
- A critical sign of low oxygen levels in ponds is when fish begin gasping for air at the surface.
- Barramundi are often raised in recirculation systems to control water quality and temperature.
- Purging yabbies before harvest helps enhance flavor by emptying their digestive tract.
Harvesting Techniques
- Common methods for harvesting barramundi include using a seine net or draining the pond, ensuring efficient capture.
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