Aquaculture Chapter Practice Questions

1\. What is the farming of fish and other aquatic organisms in controlled environments called? a\) Hydroponics b\) Aquaculture c\) Mariculture d\) Silviculture Correct Answer: b) Aquaculture 2\. What is the most valuable aquaculture species produced in Australia? a\) Barramundi b\) Tuna c\)...

1\. What is the farming of fish and other aquatic organisms in controlled environments called? a\) Hydroponics b\) Aquaculture c\) Mariculture d\) Silviculture Correct Answer: b) Aquaculture 2\. What is the most valuable aquaculture species produced in Australia? a\) Barramundi b\) Tuna c\) Salmonids d\) Oysters Correct Answer: c) Salmonids 3\. Which of the following products is the primary use for aquaculture species? a\) Beauty products b\) Fertilizers c\) Human consumption d\) Textile manufacturing Correct Answer: c) Human consumption 4\. What is the term for juvenile fish that are reared until they are ready to be stocked? a\) Fry b\) Larvae c\) Fingerlings d\) Broodstock Correct Answer: c) Fingerlings 5\. Which of these species is NOT commonly farmed in aquaculture? a\) Pearl oysters b\) Yabbies c\) Swordfish d\) Barramundi Correct Answer: c) Swordfish 6\. Which system in aquaculture involves high levels of environmental control and high stocking rates? a\) Extensive b\) Intensive c\) Natural d\) Semi-intensive Correct Answer: b) Intensive 7\. What is a key advantage of using artificial feed over natural feed in aquaculture? a\) Natural flavor b\) Lower cost c\) Reliable nutrition d\) Easier storage Correct Answer: c) Reliable nutrition 8\. What is the role of the gills in fish? a\) Reproduction b\) Oxygen extraction c\) Food consumption d\) Defense Correct Answer: b) Oxygen extraction 9\. Why is maintaining good water quality important in aquaculture systems? a\) Improves feed consumption b\) Prevents bacterial growth c\) Ensures healthy stock and meets market specifications d\) Lowers energy consumption Correct Answer: c) Ensures healthy stock and meets market specifications 10\. Which of the following is a pest control method used in aquaculture? a\) Chemical sprays b\) Physical exclusion with nets c\) Using chemical toxins d\) Introduced predators Correct Answer: b) Physical exclusion with nets 11\. What are the main components of fish meal used in aquaculture feeds? a\) Vegetables and fruits b\) Wild-caught small fish c\) Seaweed and algae d\) Mollusc shells Correct Answer: b) Wild-caught small fish 12\. Which environmental factor is crucial to monitor in intensive aquaculture systems to prevent stock losses? a\) Water depth b\) Dissolved oxygen levels c\) Sunlight exposure d\) Presence of plants Correct Answer: b) Dissolved oxygen levels 13\. What is the primary market for high-end Australian aquaculture products? a\) Domestic households b\) Pet food production c\) Textile manufacturing d\) Export market Correct Answer: d) Export market 14\. What can lead to water quality issues in aquaculture systems? a\) Excess feed and waste build-up b\) Use of artificial lighting c\) Introduction of new species d\) Temperature fluctuations Correct Answer: a) Excess feed and waste build-up 15\. Which aquaculture species is often raised in ponds in Australia? a\) Yabbies b\) Swordfish c\) Tuna d\) Barracuda Correct Answer: a) Yabbies 16\. Which aquaculture system is less labor-intensive and relies more on natural conditions? a\) Extensive b\) Intensive c\) Recirculated d\) Hybrid Correct Answer: a) Extensive 17\. What is one method of reducing predator risk in aquaculture systems? a\) Chemical deterrents b\) Exclusion barriers such as nets c\) Feeding them more d\) Changing the water pH Correct Answer: b) Exclusion barriers such as nets 18\. Which factor is most critical for ensuring fast growth in aquaculture systems? a\) Natural diet b\) Optimal water temperature c\) Artificial lighting d\) Low stocking rates Correct Answer: b) Optimal water temperature 19\. What is a major reason for using artificial feeds over natural feeds in aquaculture? a\) Reliable and balanced nutrients b\) Easier to store c\) Lower cost d\) Enhances water quality Correct Answer: a) Reliable and balanced nutrients 20\. Why is controlling water salinity important in aquaculture? a\) It increases oxygen levels b\) It affects fish health and growth c\) It reduces waste accumulation d\) It improves fish flavor Correct Answer: b) It affects fish health and growth 21\. Which of the following is a key biosecurity measure on aquaculture farms? a\) Quarantining new stock b\) Increasing water temperature c\) Feeding natural foods only d\) Using antibiotics pre-emptively Correct Answer: a) Quarantining new stock 22\. What is the benefit of aquaculture to wild fisheries? a\) Reduces pressure on wild fish stocks b\) Increases wild fish populations c\) Lowers the cost of fishing equipment d\) Prevents water pollution in wild habitats Correct Answer: a) Reduces pressure on wild fish stocks 23\. What does \'stocking density\' refer to in aquaculture? a\) The number of fish per unit area b\) The amount of feed given to fish c\) The weight of fish at harvest d\) The type of feed used Correct Answer: a) The number of fish per unit area 24\. Which species is known to change gender as it grows? a\) Salmon b\) Oysters c\) Tuna d\) Barramundi Correct Answer: b) Oysters 25\. What is a critical sign of low oxygen levels in aquaculture ponds? a\) Fish growth slows down b\) Fish gasping for air at the surface c\) Fish color changes d\) Increased water turbidity Correct Answer: b) Fish gasping for air at the surface 26\. Why are barramundi often raised in recirculation systems in Australia? a\) To control water temperature and quality b\) To reduce feed costs c\) To increase light exposure d\) To improve the taste of the fish Correct Answer: a) To control water temperature and quality 27\. What is the main reason for purging yabbies before harvest? a\) To empty the digestive tract and improve flavor b\) To increase their size c\) To reduce disease d\) To prevent molting Correct Answer: a) To empty the digestive tract and improve flavor 28\. Which aquaculture species is primarily grown for pearls in Australia? a\) Pearl oysters b\) Yabbies c\) Mussels d\) Prawns Correct Answer: a) Pearl oysters 29\. Which species of fish is commonly grown in New Zealand's aquaculture industry? a\) Barramundi b\) Green-lipped mussels c\) Tuna d\) Yabbies Correct Answer: b) Green-lipped mussels 30\. What is a common method for harvesting barramundi in aquaculture systems? a\) Using hand nets b\) Using a seine net or draining the pond c\) Luring with feed d\) Using traps Correct Answer: b) Using a seine net or draining the pond