Japanese Man "Farming" Oysters for Crop of Pearls

1912

RAISING PEARLS ON "FARM"

Japanese Has Decided He Can Produce Them on Land Laid Out in Ocean's Bed

Mr. Mikinoto's oyster farm in the Bay of Ago, off the coast of Japan. is one of the few successful attempts at the deliberate production of pearls. Mikinoto spent several years in costly experiments before he perfected his scheme.

Then he secured government patents and, according to Popular Mechanics, has succeeded in getting his "farm" on a paying basis. He first makes a bed for his crop in the shallows of the bay, where the larvae of the pearl oyster abound during the months of July and August.

He merely deposits a large number of small stones, to which the oyster spat naturally attach themselves. Then his diving women transplant the young oysters to deeper waters to protect them from the cold.

Here they lie on carefully prepared beds until in their third year they become full grown, and have firmly attached themselves to the stones by means of "necks" which they secrete.

At this time the diving women bring the mollusks to the surface and they undergo an operation. A small seed pearl is introduced into the center of the shell. Then the oysters are replanted in the bed and left alone for four years.

When they are again brought to the surface it is found that the seed pearl nucleus has been covered with many layers of the nacre, a secretion of the mollusk, and the large, brilliant translucent pearl of commerce has been formed.

But the process is not as simple as it appears. During the seven years that the farmer must wait for his crop to mature a large percentage of the oysters die. The oyster beds are raided by such enemies as the octopus and the starfish.

Occasionally the "red current" sweeps over them and in a day destroys the entire crop. At all times the farmer must keep his oyster bed free of "miruno," a seaweed which will smother the crop.

Women divers trained from girlhood to long immersions in the Sea are engaged at 20 cents a day to care for the farm. In this work they wear nothing but a head cloth, a white shirt and diving goggles. At each dive they can gather several oysters and return to the surface.

A dive occupies about one minute, and a day's work is from four to six hours. An expert can readily gather 500 oysters a day in a depth of water ranging from two to six fathoms. To keep at the work for a day they must frequently come up and warm themselves at a fire.

—The Daily Commonwealth, Fond du Lac, Wisconsin, December 17, 1912, page 8.


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—The Daily Commonwealth, Fond du Lac, Wisconsin, December 17, 1912, page 6.