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WorksheetsIB ESS 4.3 Aquatic food production systems
Total questions: 14
Worksheet time: 12mins
The shallow areas of ocean around the coasts, accounting for half of marine productivity, are found above the ____________ _________ (2 words)
(a)
Areas of cold water rising from the deep ocean, bringing nutrient-rich water to the continental shelf are called... (1 word)
(a)
UNCLOS, the UN convention on the Laws of the Sea, designates the continental shelf and an 'exclusive economic zone' of what size as belonging to a country?
200 nautical miles
20 nautical miles
0 miles, only the continental shelf belongs to a country
2000 nautical miles
What name is given to areas outside of the EEZ (economic exclusion zone) where no one country has control or legal responsibility? (2 words)
(a)
What is the key term for any industry, including capture fishing and aquaculture, that harvests fish or seafood in some way?
(a)
Over the last 20 years, what has happened to the wild fish catch?
It has increased due to increased demand and technological advances
It has stayed roughly the same despite increased demand and technological advances
It has decreased as demand is falling
Over the last 20 years, what has happened to the production of fish via aquaculture?
It has increased due to increased demand and technological advances
It has stayed roughly the same despite increased demand and technological advances
It has decreased as demand is falling
Which capture fishing technique can cause permanent damage to the sea bed, destroying fragile benthic ecosystems?
(a)
Which fishing technique can result in huge by-catch of non-target species such as sharks, turtles, marine mammals and birds, if not properly managed?
(a)
Purse seine nets are used to target which species?
Crabs, lobsters and other crustacea
Benthic species
Shoaling pelagic species
Mussels, oysters and other bivalves
Which of these are potential issues with open-net salmon farms
Excess nutrients from faeces and food enter the ecosystem
Parasites can pass to native species
Escaped fish can interbreed with local wild populations and affect the gene pool
There is a large bycatch of other species
Monoculture leaves farmers vulnerable to pest and disease problems
Which of these are benefits of integrated aquaculture?
Prevents the introduction of non-native species to an ecosystem
No habitat loss or degradation is needed to set up
Reduces eutrophication as wastes from one species are recycled by another
Farmed species do not compete with local species for food
Polyculture systems are more resilient to environmental changes
What is the name of the metaphor illustrating the conflict between the short term advantage to an individual in overexploiting a communal resource and the long term sustainable use of that resource?
(a)
What term describes the highest amount of a resource that can be extracted without depleting the original stock?
(a)
