Trocino Lecture 4 Flashcards
Which stage involves the management, feeding, selection, and slaughtering in aquaculture?
A) Reproduction
B) Nursery
C) Seeding
D) Fattening
d
What are the main characteristics that differ among production systems?
A) Type of feed used
B) Species farmed
C) Management intensity
D) All of the above
d
Which water characteristic is considered when differentiating between freshwater and marine aquaculture?
A) pH levels
B) Salinity
C) Clarity
D) Flow rate
b
In extensive aquaculture systems, what is typically used for feeding?
A) Natural trophic availability
B) Only aquafeed
C) Combination of aquafeed and natural food
D) Fertilization
a
What is the primary oxygenation method used in intensive aquaculture systems?
A) Natural oxygenation
B) Optional aeration
C) Aeration systems and/or pure O2
D) No oxygenation needed
c
Which type of aquaculture does not typically require waste water treatment?
A) Extensive
B) Semi-intensive
C) Intensive
D) None of the above
a
What type of aquaculture involves using lagoons designed for fish to move with sea tides?
A) Intensive aquaculture in freshwaters
B) Extensive aquaculture in brackish waters
C) In-shore based installation for marine species
D) Water-based (sea cages) systems
b
Which species are typically farmed in extensive aquaculture in brackish waters?
A) Carp and catfish
B) Salmon and trout
C) Seabass, sea bream, eels, and mullets
D) Tilapia and rainbow trout
c
What is a characteristic feature of valliculture?
A) Using artificial tanks
B) Isolation of coastal water ecosystems by humans for fish production
C) Recirculating systems
D) Indoor aquaculture systems
b
Which species is listed as critically endangered by the IUCN and farmed in valliculture?
A) Chelon labrosus
B) Liza aurata
C) Anguilla anguilla
D) Mugil cephalus
c
What is the main method used to seed traditional valliculture systems?
A) Hatchery-produced fry
B) Artificial insemination
C) Wild fish entrance and seeding of fry
D) Genetic modification
c
In extensive aquaculture in freshwaters, what is often used to stimulate the aquatic food pyramid?
A) Chemical additives
B) Cleaning and fertilizing ponds
C) Mechanical feeders
D) Antibiotics
b
Which species are commonly farmed in extensive freshwater aquaculture ponds?
A) Carp, zander, pike, and catfish
B) Salmon, trout, and tilapia
C) Seabass and seabream
D) Shrimp and prawns
a
What type of systems are used in intensive aquaculture in freshwaters for continuous water flow?
A) Closed recirculating systems
B) Tanks with stagnant water
C) Flow-through systems
D) Lagoons
c
What is a key advantage of using recirculating aquaculture systems (RAS)?
A) Lower initial costs
B) High production per surface unit
C) Low pathogen control
D) High water requirements
b
What is a common species farmed using recirculating systems in freshwater?
A) Seabass
B) Carp
C) Rainbow trout
D) Shrimp
c
What type of aquaculture system holds fish in a net anchored to the bottom and maintained on the surface by a floating framework?
A) In-shore based systems
B) Sea-cages systems
C) Recirculating systems
D) Pond systems
b
What is one factor to consider when selecting a site for sea-cages systems?
A) Water temperature
B) Type of feed
C) Bathymetry or site depth
D) Stocking density
c
Which species are commonly farmed in sea-cages in the Mediterranean?
A) Carp and catfish
B) Seabass, seabream, and tuna
C) Trout and salmon
D) Tilapia and sturgeon
b
Which type of cage is often used for farming high-value species like tuna?
A) Square floating cages
B) Circular floating cages
C) Submersible cages
D) Fixed inshore cages
b
What type of impact is caused by sedimentation from organic particulates in aquaculture?
A) Geochemical processes
B) Alien species diffusion
C) Interaction with wild populations
D) Pathogen transmission
a
Which is an origin of geochemical changes in aquaculture systems?
A) Use of chemicals
B) Escape of farmed species
C) Sedimentation from feces and uneaten feed
D) Diffusion of alien species
c
Which is a potential impact of pathogen transmission in aquaculture?
A) Release of gametes
B) Capture of wild fry
C) Indigenous and newly introduced parasites
D) Use of wild fish
c
What is one method used to mitigate the environmental impacts of aquaculture?
A) Reducing feeding rates
B) Increasing fish stocking density
C) Implementing integrated multi-trophic aquaculture (IMTA)
D) Using artificial light systems
c
In IMTA, which type of species is typically used to recycle waste nutrients?
A) Predatory fish
B) Shellfish and algae
C) Freshwater fish
D) Herbivorous fish
b
What type of farming system is used primarily for shellfish in Europe?
A) Pond systems
B) Bottom farming and floating systems
C) Recirculating systems
D) Sea-cages systems
b
Which species are typically farmed in shellfish aquaculture?
A) Oysters and mussels
B) Salmon and trout
C) Carp and catfish
D) Seabass and seabream
a
What is a common aquaculture practice for farming clams?
A) Using recirculating systems
B) Prefattening in lagoons
C) Raising in sea-cages
D) Feeding with artificial pellets
b
Which farming method involves the use of longlines for shellfish?
A) Bottom farming
B) Raft farming
C) Floating systems
D) Intensive tank systems
c
What is a significant advantage of aquaponics systems?
A) High initial costs
B) Integration of fish and plant farming
C) High water requirements
D) Limited species diversity
b
What is the indicative surface/volume for extensive aquaculture systems?
A) More than 20 ha
B) Until 20 ha per basin
C) 25-20,000 m3
D) Less than 1 ha
a
Which type of aquaculture system uses tanks made of materials like concrete, plastic, or fiberglass?
A) Extensive
B) Semi-intensive
C) Intensive
D) Brackish water systems
c
What is the typical stocking density for intensive aquaculture systems?
A) Until 0.0025 kg/m3
B) Until 1 kg/m3
C) 20-30 kg/m3
D) Over 50 kg/m3
c
In which type of aquaculture system is the use of drugs compulsory?
A) Extensive
B) Semi-intensive
C) Intensive
D) Valliculture
c
What water supply method is typically used in semi-intensive aquaculture systems?
A) Natural, differences of height or tides
B) Natural or mixed
C) Based on pumps
D) Underground water
b
Which system requires compulsory waste water treatment?
A) Extensive
B) Semi-intensive
C) Intensive
D) Traditional valliculture
c
In the context of European aquaculture, what is a feature of water-based (sea cages) systems?
A) Used for freshwater species
B) Suitable for coastal and open waters
C) Only used for shellfish farming
D) Require low water quality
b
Which species is commonly farmed in intensive in-shore based installations for marine species?
A) Carp
B) Rainbow trout
C) Turbot
D) Catfish
c
Steinbutt
What is a key factor in selecting a site for sea-cages systems?
A) Proximity to urban areas
B) Depth and current speed
C) Availability of artificial feed
D) Species diversity
b
Which type of net is often used in the design of sea-cages?
A) Cotton nets
B) Nylon or polyamide nets
C) Silk nets
D) Paper nets
b
What type of aquaculture system is used primarily for mussels in Europe?
A) Sea-cages
B) Ponds
C) Longlines and rafts
D) Recirculating systems
c
Which aquaculture method is described by maintaining ponds to foster aquatic fauna development?
A) Intensive aquaculture
B) Extensive aquaculture
C) Recirculating systems
D) Sea-cages systems
b
What is a common method used in valliculture for capturing and selecting fish?
A) Using automatic feeders
B) Pushing fish towards basins for collection
C) Chemical sedation
D) Genetic selection
b
Which species is commonly farmed using in-shore based installations for marine species?
A) Salmon
B) Trout
C) Gilthead sea bream
D) Catfish
c
What type of aquaculture system often involves the use of HDPE cages?
A) Recirculating systems
B) Extensive ponds
C) Sea-cages
D) Brackish water systems
c
Which characteristic is important for nets used in sea-cages?
A) Biodegradability
B) Chemical resistance
C) Elasticity
D) Transparency
b
Which type of species is often farmed using longlines in deeper waters?
A) Shellfish
B) Freshwater fish
C) Marine mammals
D) Herbivorous fish
a
What type of farming involves growing oysters using bottom farming and raft methods?
A) Aquaponics
B) Integrated multi-trophic aquaculture
C) Shellfish farming
D) Valliculture
c
What is a key feature of aquaponics systems?
A) High initial costs
B) Use of antibiotics
C) Integration of plant and fish farming
D) Limited to marine species
c
Which production stage in aquaculture involves the hatchery and nursery phases?
A) Fattening
B) Grow-out
C) Maturation and broodstock management
D) Feeding
c
What is one environmental impact caused by organic particulates in aquaculture?
A) Geochemical processes
B) Increased biodiversity
C) Improved water clarity
D) Reduced pathogen load
a
Which impact is associated with the release of gametes from aquaculture systems?
A) Sedimentation
B) Pathogen transmission
C) Interaction with wild populations
D) Chemical contamination
c
Which type of aquaculture has the lowest sedimentation impact according to the provided tables?
A) Intensive shellfish farming (long lines)
B) Semi-intensive shellfish farming (long lines)
C) Ranching
D) Intensive (fish, RAS)
c
What is a major factor in the selection of a site for sea-cage aquaculture?
A) Proximity to processing facilities
B) Current speed and direction
C) Availability of freshwater sources
D) Local human population density
b
Which species are typically farmed in recirculating aquaculture systems?
A) Shellfish and algae
B) Predatory fish and crustaceans
C) Rainbow trout, catfish, and eel
D) Herbivorous fish
c
What type of farming system is used for integrating fish and plant farming?
A) Aquaponics
B) Shellfish farming
C) Valliculture
D) Sea-cages
a
Which species is commonly farmed in intensive freshwater aquaculture systems?
A) Carp
B) Rainbow trout
C) Seabass
D) Mussels
b
What is a key benefit of using recirculating aquaculture systems?
A) Lower energy requirements
B) High production per surface unit
C) Reduced pathogen control
D) Lower initial costs
b
Which type of farming involves using earthen ponds in plain areas for thermophilic species?
A) Intensive aquaculture
B) Extensive aquaculture
C) Recirculating systems
D) Sea-cages systems
b
What type of aquaculture system is characterized by floating cages?
A) Valliculture
B) Recirculating systems
C) Sea-cages
D) Extensive pond systems
c