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1. Fishing in the ocean
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2. Fishing in the ocean
Fishermen use a device called the fish-finder
which sends out sound waves. These sound
waves bounce off schools of fish and reflect
back to the fish-finder. A display panel on the
fish-finder tells the fishermen where there
fish are.
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3. Fishing in the ocean
Fishermen also have the option of using
satellites to get information on fish. Fish live
in areas where a certain temperature suits
them the most. Fishermen know about about
this and and use satellites which can read
ocean temperatures to locate schools of fish.
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4. Fishing in the ocean
SATELLITES READ SURFACE TEMPERATURES
Satellites help detecting
surface temperatures only. So
this only allows fishermen to
find fish that swim near the
surface of the oceans.
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5. Fishing in the ocean
ADDITIONAL INFORMATION
A fish-finder operates almost like a radar,
except that a radar uses radio waves and a
fish-finder uses high-frequency sound waves.
There are two types of fish-finders, the
simpler one transmits sound waves
downwards while the more complex one
transmits waves in all directions, therefore
covering a larger area, providing more data.
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6. Fishing in the ocean
PROJECT
Classify these fish (sharks, whales, crabs,
prawns, tuna, salmon, king fish, squid) into
shallow water or deep sea fish.
What is the difference between a fresh water fish
and a salt water fish?
Try your hand at fishing at a nearby pond, lake
or even the sea. Ensure you are accompanied by
an elder for this project. All you need for the
activity is a good sturdy stick, some rope, a hook
and some dough. Assemble your fishing rod, and
go fishing!
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