Reverse Osmosis is the most promising method of desalinization of ocean water. Why and how does it work?
high presure system forces water through a semipermeable membrane. It uses less energy than distillation
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15
What is a renewable resource?
Resources that can naturally replace harvested numbers.
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What is a sustainable yield?
The number of individuals in a population that can be harvested without reducing the size of the population or letting it grow
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trap
No points!
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star
Double points!
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shark
Other team loses 20 points!
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thief
Give points!
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What are clupeoid fishes?
Small plankton eating fishes that travel in large schools. Anchovies, sardines, herrings
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15
Why do we eat so much tilapia in America?
Marketing - advertisers gave it a more appealing name (Cherry Snapper)
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describe purse seine fishing
fishing that uses a net, called a seine, that hangs vertically in the water with its bottom edge held by weights, and a draw string at the top to close it
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banana
Go to last place!
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fairy
Take points!
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rocket
Go to first place!
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banana
Go to last place!
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15
What is a non renewable resource?
Resources that are not capable of replacing harvested numbers. minerals, natural gas,
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What is bycatch?
the unwanted fish and other marine creatures caught during commercial fishing for a different species.
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What is closed mariculture?
farming marine organisms where the environment is completely controlled by the farmer
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How are most clupeoid fish utilized?
because of their small size, they are mostly ground into a fish meal that is used as a protein supplement for other foods
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trap
No points!
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seesaw
Swap points!
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fairy
Take points!
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lifesaver
Give 25 points!
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15
describe trawling.
a method of fishing that involves pulling a fishing net through the water behind one or more boats. dragging it on the bottom
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What is mariculture?
The use of farming techniques to grow and harvest marine animals and plants
