JPH01199529A - Method for culturing pearl by mother shell of fresh-water cultured pearl - Google Patents

Abstract

PURPOSE:To efficiently culture pearls without exterminating pearly fresh-water mussel after taking out the pearls, by secularly and successively inserting seeds into peal sacks after taking out the resultant pearls at a prescribed interval and repeatedly culturing the pearls. CONSTITUTION:New seeds are inserted into pearl sacks formed in mantles 2 after taking out the first pearl and similar operation is secularly repeated after a prescribed length of time elapsed. Thereby, pearls of large size are successively cultured. As a result, the pearls of a prescribed shape can be repeatedly cultured until the life of fresh-water shells expires.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) This invention relates to an efficient method for culturing pearls using the outer capsule of freshwater molluscs (mainly molluscs).

(Conventional technology) Pearl culture using Ikechi oysters, which are the mother oysters of freshwater cultured pearls, has traditionally been carried out not only in a seedless method but also in a seeded method using the outer capsule. Up until now, the outer capsule has only been used once, and the lifespan of the oyster oyster ends once the pearl is taken out, which is inefficient.

(Issues to be solved by the invention) In view of the above-mentioned prior art, this invention was developed in Ogata Village in an attempt to explore the survival environment of Ikecho oysters and to confirm the survival rate after surgery (after pearl extraction) in this environment. The oysters grown in the remaining lakes have a thick outer shell, and when operated on during the period of active feeding in July to August, the survival rate of the oysters is extremely high. 1 can now be reused, and as a result of several years of testing,
A method for cultivating pearls by repeatedly using pearl sacs has been established, and this invention is an efficient method for cultivating pearls by reusing the pearl sacs formed in the shell without killing the oysters after removing the pearls. The purpose of this invention is to provide a method for culturing pearls using freshwater cultured pearl mother oysters.

(Means for Solving the Problems) This invention involves inserting new nuclei into the pearl sac formed in the outer capsule of a freshwater oyster, and inserting a new nucleus into the pearl sac formed in the outer capsule of a freshwater oyster, and sequentially inserting a new nucleus into the pearl sac formed in the outer capsule of a freshwater oyster at regular intervals over time. In this method, the nucleus is inserted into the pearl sac after the pearl has been extracted, and the pearl is cultivated repeatedly.

Here, the nucleus to be inserted into the pearl sac may not only be spherical, but also rectangular, elliptical, triangular, or ring-shaped, and even if it is spherical, it may be approximately the same size as the pearl after removal. It also includes things that gradually increase in size (effect) According to the above method, when cultivating pearls for the second time, it does not take many years (approximately 1 year) to form a pearl sac. It becomes possible to cultivate large pearls while cultivating pearls one after another.

(Example) To specifically explain the present invention using an example, as shown in FIG.
Nacre cell 6 excised from the area indicated by the imaginary line around the periphery of
The nacreous cells 6 are cut into small pieces and transplanted.At this time, the side of the nacreous cells 6 attached to the shell is transplanted toward the upper surface of the outer capsule 2, and in the case of the nucleus-free method, it is left in this state for several years. (It will be molded to a size that can be commercialized in about 4 years.) In the case of culturing and using the nucleated method, the spherical nucleus 4 (about 2111 II in diameter)
A shell made into a sphere. ) transplanted nacre cells 6
It is inserted into the top surface of the cellar and cultivated in the same way for several years. Next, after the above-mentioned several years have elapsed, a scalpel is inserted so as to divide the mantle 2 into two vertically above the pearl forming part 5 of the mantle 2 as shown in FIG. 1, and as shown in FIG. Then, the pearls 7 that have been molded and grown to a predetermined size are taken out from the pearl sack 6. For the sake of explanation, Figure 1 shows the upper and lower oysters being incised from side to side, but the actual pearl removal is done by opening the mouth slightly with a mouthpiece, which causes the oyster oyster 1 to become fatigued. The work shall be carried out quickly and with great care without causing unnecessary damage.

As shown in Figure M2, a pearl sac 6 is formed after the first pearl 7 is taken out, so a nucleus 4 of approximately the same size as the pearl 7 taken out is placed in the pearl sac 6 as shown in Figure 3. By inserting it again and repeating the same operation after a predetermined period of time has elapsed, large pearls 7 can be cultivated while cultivating pearls 7 one after another. Furthermore, by making the nacre cells 6 that are first transferred to the outer capsule 2 into a rectangular, triangular, or other shape, it is possible to culture pearls 7 of the same shape, and after these pearls 7 are taken out. By inserting a nucleus 4 of the same shape into the burl sac 6, pearls 7 of the same shape can be cultivated repeatedly.

(Effect of the invention 2 As described above, according to this invention, pearls of a predetermined shape can be cultivated repeatedly until the lifespan of freshwater oysters expires, and by sequentially inserting and using pearls corresponding to the pearl sacs, pearls can be cultured at predetermined intervals. It exhibits the effect of being able to culture large pearls, and the effect of contributing to the effective use of mother oysters of freshwater cultured pearls and the cultivation of pearls is enormous.

[Brief explanation of the drawing]

Fig. 1 is an explanatory opening plan view of a snail shell according to the present invention, Fig. 2 is a partially enlarged cross-sectional view of the outer shell of the burl sack forming part, and Fig. 3 is an explanatory diagram of the sequential use of the burl sack. be. In the figure, 1 is a pearl oyster, 2 is a capsule, 6 is a nacre cell, 4 is a nucleus, 5 is a pearl forming part, 6 is a pearl sac, and 7 is a pearl.

Claims (2)

[Claims] (1) In pearl cultivation using the outer shell of freshwater oysters, a new nucleus is inserted into the pearl sac formed in the outer shell, and the nuclei are sequentially inserted into the pearl sac after the pearl is removed at regular intervals over time. A method for cultivating pearls using mother oysters for freshwater cultured pearls, which is characterized by repeatedly culturing pearls. (2) In the culture of pearls using the shell membrane of freshwater oysters, after the pearls have been removed, a nucleus approximately the same size as the pearls at the time of removal is inserted into the pearl sac, and the culture is repeated over time to produce pearls that are cultured one by one. A method of culturing pearls using mother oysters of freshwater cultured pearls, which is characterized by producing large pearls.