As the search for high-protein foods grows more desperate, imaginative and sophisticated technologies have been developed in the United States and Japan to revive the ailing fishing industry.
AERIAL VIEW shrimp farm (2 shots)
GV PAN shrimp farm buildings
GV INT. man locking at tanks
SV PAN shrimps swimming in tanks
CU shrimps in tanks (2 shots)
GV Japanese fishing vessel at sea
CU Electronic device lowered overboard
SCU Man enters cabin and puts cassette in
CU Diagram of how cuttlefish are caught
SDV Cuttlefish being pulled out of sea
SV PAN scooping cuttlefish onto deck
GV Fishing boat at sea
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Background: As the search for high-protein foods grows more desperate, imaginative and sophisticated technologies have been developed in the United States and Japan to revive the ailing fishing industry.
Research has been pushed ahead in Japan because of the damage inflicted on inshore fishing by pollution and the probability of stricter controls on fishing zones. Up to now Japanese fishing fleets have roamed freely over the oceans.
To improve catches in deep-se fishing, sound techniques have been evolved. Loudspeakers are lowered int other water, and huge quantities of cuttlefish can be seduced to the surface within reach of hooks and note by the use of mating and other sounds. When fully developed, this technique will help in fishing deep ocean areas which have previously been untapped.
Scientific research is also helping the fish industry near Puerto Penasco in Mexico. At one time shrimping was the mainstay of the town's economy, but in recent years disease and ocean predators have reduced the shrimp survival rate to one half of one per cent. As a result the shrimping industry has virtually died out.
But now the universities of Arizona and Sonora have combined on a programme to help the shrimping industry. Adult shrimps are brought from the ocean to tanks where the food and water temperature is regulated and the are free from predators.
The survival rate has rocketed dramatically to 40 per cent -- or 80 times what it is under natural ocean conditions. A female can spawn shrimps worth 34,000 U.S. dollars (14000 pounds sterling) if all her eggs survive. So it could become big business, but for the immediate future the people of Puerto Penasco will be happy if their shrimp industry just survives.
SYNOPSIS: The universities of Arizona and Sonora have combined in a research programme to revive the almost extinct shrimp catching industry of the small Mexican town of Puerto Penasco.
Adult shrimps are brought in from the sea and kept safely away from ocean predators at a controlled temperature.
The survival rate of the shrimps has increased eighty fold and this research may yet save an industry -- which is vital to Puerto Penasco but had been in danger of being wiped out by disease and ocean predators.
In Japan, too, the desperate search for high-protein foods has led to the application of imaginative new technologies to the ailing fishing industry. Loudspeakers are lowered into the water and the fish are attracted by mating calls and other seductive sounds.
Such new techniques are especially vital to deep-sea fishing. Pollution had virtually destroyed Japan's inshore supplies, and future legislation is expected to prevent its fleets roaming freely over the ocean.
The new apparatus means that large quantities of fish can be brought within reach of hooks and nets.
This now means that deep-ocean areas which have previously been untapped can now be fished. Such possibilities are particularly important to Japan because some countries have demanded that they should have exclusive fishing rights to a two hundred mile zone round their shores. But Japanese fleets will be able to fish in deep ocean areas that stand outside these zones.