Process for producing pearls in abalone and other shell-bearing

Details Process for producing pearls in abalone and other shell-bearing Process for producing pearls in abalone and other shell-bearing

1993-06-28

1994-09-20

Mancene, Gene

Animal husbandry

Aquatic animal culturing

Mollusk culturing

A01K 6100

Patent

active

053479513

ABSTRACT:
The process includes the step of forming an opening in the shell of a host mollusk, such as an abalone, at a location covering a soft tissue thereof, such as the mantle-covered gonadal tissue. A pearl nucleus is then inserted into the opening. The pearl nucleus comprises a nucleating portion, typically semispherical in configuration, and a nut portion. The pearl nucleus is either threaded or configured to provide a tight frictional fit with the peripheral edge of the opening. The pearl nucleus is inserted into the opening and then turned by means of the nut portion to provide a very tight fit in the opening. In another embodiment, a pearl nucleus is drawn into the abalone in the vicinity of the head region, or through an opening formed in the abalone shell, by means of a probe which is introduced into the abalone through another smaller opening. The pearl nucleus is pulled into the abalone until it is seated adjacent the smaller opening, where it is held by tissue pressure and glue. The larger opening drilled in the abalone shell may be closed with an elongate pearl nucleus having a size and shape sufficient to pass through the opening in a first orientation and capable of substantially occluding the opening in a second orientation. In a further alternative embodiment, a pearl nucleus and piece of graft tissue are secured to one end of a curved, elongate probe and threaded through a soft tissue of the abalone to an implanted position. The same procedure may be employed for implanting graft tissue absent a pearl nucleus to form non-nucleated pearls. In a further alternative embodiment of the process, a pearl nucleus may be formed in a soft tissue of an abalone, such as the aductor muscle, by using a hypodermic syringe to inject a fast-setting resin into a cavity formed in the muscle tissue.

REFERENCES:
patent: Re18700 (1932-12-01), Mikimoto
patent: 988889 (1911-04-01), Mikimoto
patent: 1176090 (1916-03-01), Nishikawa
patent: 1328008 (1920-01-01), Mikimoto
patent: 2126024 (1938-08-01), Mikimoto
patent: 3113554 (1963-12-01), Kanai
patent: 3871333 (1975-03-01), Gotoh
Boutan/Lacaze-Duthiers, "The Artificial Production of Pearls in Haliotis", Comptes Rendus Hebdomadaine, vol. 127; 1898, pp. 828-830.
Uno, "Pearl Culture Using Abalone", The Aquaculture, 1957, 3(4):92-95.
Miwa, "Abalone Pearls", Mystery of the Pearl, 1980, Ch. 5, 92-93.
Wada, "Pearl Culture Using Abalone", In Pearls, 1982, Ch. 8, pp. 241-242.
Fankboner, "Pearl Culture in Abalone", Infofish International, Jul./Aug. 1991, pp. 52-55.
"Biffer Abalone Pearls in 1992", Hong Kong Jewelery, 1991, vol. 2 #50, pp. 90-91.

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