3. What happens when warm and cold currents meet?
How is it important for fisheries?
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Answer:
Some of the world's most productive fishing grounds are located where warm and cold currents converge. For example, where Labrador current (cold) and Gulf stream (warm) meet, a dense fog is there and it is one of the richest fishing grounds of the world. When they meet the food of fishes is formed.
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By meeting the warm and cold currents, a large amount of fog is created, which controls the temperature conditions in the fishing regions of the meeting grounds.
Explanation:
The movement of ocean waters from one part to another takes place due to effects of earth's rotation, wind difference, salinity and density of sea waters etc. The movement of ocean water is called ocean current.
Surface ocean currents are divided as warm ocean current and cold ocean current. When cold and warm currents meet some shallow banks may be created by the deposition of mud and stones. The Grand Bank and Doggers Bank are the examples of this kind. These shallow banks offer an ideal condition for rich marine life. For these reasons, the shallow banks are famous for fishing.
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