JP2597956B2 - Method and apparatus for removing eggs from pearl oysters for pearl culture - Google Patents

Method and apparatus for removing eggs from pearl oysters for pearl culture

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Publication number
JP2597956B2
JP2597956B2 JP6185259A JP18525994A JP2597956B2 JP 2597956 B2 JP2597956 B2 JP 2597956B2 JP 6185259 A JP6185259 A JP 6185259A JP 18525994 A JP18525994 A JP 18525994A JP 2597956 B2 JP2597956 B2 JP 2597956B2
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JP
Japan
Prior art keywords
water tank
pearl
seawater
egg
ozone
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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JP6185259A
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Japanese (ja)
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JPH0823818A (en
Inventor
正信 鈴木
Original Assignee
有限会社三重オゾン
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Priority to JP6185259A priority Critical patent/JP2597956B2/en
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/80Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
    • Y02A40/81Aquaculture, e.g. of fish

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  • Farming Of Fish And Shellfish (AREA)

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【産業上の利用分野】本発明は真珠養殖用アコヤ貝の卵
抜き方法と、そのための装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for removing eggs of pearl oysters for pearl culture and an apparatus therefor.

【0002】[0002]

【従来の技術】アコヤ貝は原則的に雌雄異体であるが、
その雌雄同じ生殖腺の構造を有しており、これを母貝と
する真珠養殖ではその挿核手術前に、「卵抜き」と称す
る人為的な放卵(産卵の促進)操作が施されている。
2. Description of the Related Art Akoya oysters are in principle male and female,
It has the same gonad structure of its male and female, and in pearl culture using this as a mother shellfish, an artificial oviposition (promotion of oviposition) called "egg extraction" is performed before the intubation surgery. .

【0003】その卵抜き操作を行なう理由は、生殖腺
(挿核部位)に生殖細胞(卵及び精)が充満して、挿核
できなくなるからであり、又手術後における貝の健康を
順調に回復させるためである。
[0003] The reason for performing the egg removal operation is that the gonads (nucleated site) are filled with germ cells (eggs and sperm) and cannot be inserted, and the health of the shellfish after the operation is smoothly restored. It is to make it.

【0004】他方、上記アコヤ貝は満1年程度で成熟・
放卵(放精)するが、その放卵誘発の刺激因子としては
水温と塩分濃度の変化が重要であり、その最適の水温は
約18〜28℃、同じく塩分濃度Sは約31〜34‰
(比重に換算すると約1.023〜1.026である
が、真珠養殖業界ではこの数値を23〜26と略して表
示する慣例である。)であるとされており、実際上三重
県では上記放卵が6月中旬から始まって、7月に盛期と
なり、9月下旬まで続く様子である。
On the other hand, the above pearl oysters are matured in about one year.
Spawning (Hosei), but, the spawning as a stimulator of induction is important change in water temperature and salinity, temperature of the optimum of about 18 to 28 ° C., the same Ku salinity S is about 31 to 34 ‰
(Approximately 1.023 to 1.026 when converted to specific gravity
However, in the pearl culture industry, this figure is abbreviated as 23-26.
This is the convention shown. In fact, in Mie Prefecture, the spawning starts in the middle of June, reaches its peak in July, and continues until late September.

【0005】殊更、内湾では大潮時に塩分濃度などの海
況変動が大きくなる関係上、放卵が活発化し、その好適
な養殖漁場では海面が白濁する程の放卵現象が、梅雨明
けの晴天日などに認められることもある。
[0005] In particular, in the inner bay, the spawning is activated due to the fluctuation of sea conditions such as salinity at the time of the spring tide, and the spawning phenomenon such that the surface of the sea becomes cloudy in the preferred aquaculture fishing grounds, such as a sunny day after the rainy season May be recognized.

【0006】そこで、従来ではアコヤ貝の卵抜き操作に
当り、上記最適の環境条件を満たす海域を求めて、漁船
により貝を運搬し、その抑制篭へ収容した状態のもと
で、イカダなどから水中へ吊り下げ、数日間浸漬させて
いる。
[0006] Therefore, conventionally, in the operation of removing eggs of pearl oysters, in order to find a sea area that satisfies the above-mentioned optimal environmental conditions, shellfish are transported by fishing boats and stored in their restraining baskets, and from a raft or the like. Hanged in water and immersed for several days.

【0007】そして、その間には上記放卵誘発刺激とし
ての温度差や塩分濃度差を与えるため、干潮から満潮に
至る潮位の上昇線(潮の流れ)を利用したり、抑制篭の
吊り下げ深さを変えたり、渚に置いたり、天日にさらし
たり、内湾から外洋水域に移したり、抑制篭を適宜に反
転させたりしている。
In the meantime, in order to provide a temperature difference or a salt concentration difference as the above-described ovulation-inducing stimulus, a rising line (tide flow) at the tide level from low tide to high tide is used, or the depth of the hanging of the restraining cage is used. They change the height, place it on the beach, expose it to the sun, move it from the inner bay to the open waters, or flip the restraining basket appropriately.

【0008】[0008]

【発明が解決しようとする課題】ところが、このような
自然海域での卵抜き方法では、その作業上豊富な経験と
長時間並びに重労働を要する。又、上記多大の苦労を重
ねたとしても、あくまでも海域での自然放卵を人為的に
助勢する方法であるに過ぎないため、その環境条件や作
業者の熟練度に因り、所期の卵抜き効果を確実に安定良
く達成することができない。
However, such a method of removing eggs in a natural sea area requires abundant experience, long hours and heavy labor in the operation. In addition, even if the above-mentioned great effort is repeated, it is only a method of artificially assisting natural spawning in the sea area, so due to the environmental conditions and the skill of the workers, the expected egg removal The effect cannot be reliably and reliably achieved.

【0009】[0009]

【課題を解決するための手段】本発明はこのような課題
の解決を企図しており、そのための卵抜き方法として、
第1に塩分濃度Sが約31〜34‰の海水を水槽に貯溜
させ、その水温を約18〜28℃に保った上、卵抜き篭
に収容したアコヤ貝を、上記水槽内へ浸漬させて、その
水槽内へオゾンを送り込み曝気させることにより、上記
アコヤ貝に放卵誘発刺激を与えることを特徴とし、
SUMMARY OF THE INVENTION The present invention is intended to solve such a problem.
First, seawater having a salt concentration S of about 31 to 34 ‰ is stored in a water tank, the water temperature is maintained at about 18 to 28 ° C, and the pearl oysters stored in the egg-drawing basket are immersed in the water tank. By feeding ozone into the aquarium and aerating, thereby giving the pearl oysters an ovulation-inducing stimulus,

【0010】又、第2に同じく塩分濃度Sが約31〜3
4‰の海水を水槽に貯溜させ、その水温を約18〜28
℃に保った上、卵抜き篭に収容したアコヤ貝を、上記水
槽内へ浸漬させて、その水槽内へオゾンを送り込み曝気
させると共に、水槽内の全体に強制循環させることによ
り、上記アコヤ貝に放卵誘発刺激を与えることを特徴と
する。
Second, the salt concentration S is about 31 to 3
4 ‰ of seawater is stored in a water tank, and the water temperature is about 18-28.
After maintaining the temperature at ℃, the pearl oysters contained in the egg-drawing basket were immersed in the above-mentioned water tank, and the ozone was fed into the water tank and aerated. It is characterized by giving an ovulation induction stimulus.

【0011】更に、上記方法を実施するための卵抜き装
置として、海水の汲み上げ用給水ポンプと、その汲み上
げた海水の貯溜用水槽と、その水槽内での海水循環ポン
プと、同じく水槽に連通接続されたオゾン発生機と、上
記海水の温度を約18〜28℃に保つ熱交換器や電熱ヒ
ーターなどの加温器と、アコヤ貝を収容する卵抜き篭と
から成り、上記水槽に塩分濃度Sが約31〜34‰の海
水を貯溜させ、その水中にアコヤ貝を収容した卵抜き篭
を浸漬させた状態において、上記オゾン発生機から水槽
内へオゾンを送り込み曝気させると共に、上記循環ポン
プにより強制循環させるように定めたことを特徴とする
ものである。
Further, as an egg removing device for carrying out the above method, a water supply pump for pumping seawater, a water tank for storing the pumped seawater, a seawater circulation pump in the water tank, and also connected to the water tank. an ozone generator that is, the warmer, such as heat exchangers or electric heater to maintain the temperature of the sea water at about 18 to 28 ° C., composed of a egg free cage for accommodating the pearl oysters, salinity in the water tank S In a state where approximately 31 to 34 cm of seawater is stored and the egg basket containing pearl oysters is immersed in the water, ozone is sent from the ozone generator into the water tank to aerate and forced by the circulation pump. It is characterized by being determined to be circulated.

【0012】[0012]

【作用】第1発明の上記卵抜き方法によれば、アコヤ貝
が自然海域での環境条件と同じく、その放卵しやすい水
温と塩分濃度の海水中に浸漬された状態のもとで、しか
もオゾンの曝気による積極的な放卵誘発刺激を受けるた
め、陸上での安楽な作業のもとに、且つ熟練を要するこ
となく、安定・確実な卵抜き効果を達成することができ
る。
According to the egg removing method of the first invention, the pearl oysters are immersed in seawater having a temperature and salt concentration at which the eggs are easy to spawn, as well as the environmental conditions in the natural sea area, and Since it is positively stimulated to spawn by ozone aeration, it is possible to achieve a stable and reliable egg removal effect under easy operation on land and without skill.

【0013】特に、第2発明の上記卵抜き方法によれ
ば、オゾンの曝気された海水が水槽内の全体に亘って、
強制的に流動・循環されるようになっているため、アコ
ヤ貝の各個に対してムラなく、上記オゾンによる刺激を
与えることができ、上記卵抜き効果をますます昂め得る
のである。
[0013] In particular, according to the egg removing method of the second invention, the ozone-aerated seawater is applied to the whole of the water tank.
Since the oysters are forced to flow and circulate, each of the pearl oysters can be evenly stimulated by the above-mentioned ozone, and the above-mentioned egg removing effect can be further enhanced.

【0014】又、第3発明の上記卵抜き装置によれば、
水槽を希望の場所に据付けて、天候や季節などに左右さ
れることなく、陸上での卵抜き操作を便利に行なえるこ
とは勿論、その加温器によって海水の温度低下を防止で
きると共に、循環ポンプにより海水を強制循環させるよ
うになっているため、篭の移動操作などを加える必要も
なく、省力化に著しく優れる。
Further, according to the above egg removing device of the third invention,
By installing the aquarium at the desired location, it is possible to easily perform the egg removal operation on land without being affected by the weather or the season, and of course, the heater can prevent the temperature of seawater from dropping and circulate. Since the seawater is forcedly circulated by the pump, there is no need to add a basket moving operation, etc., which is extremely excellent in labor saving.

【0015】[0015]

【実施例】以下、図面に基いて本発明の詳細を説明する
と、先づ図1、2は卵抜き終了するまで海水(W)を排
出せず、その言わば溜水(止水)として利用する卵抜き
装置の第1実施例を示しており、(11)は海水(W)
を貯溜するための水槽であって、繊維強化プラスチツク
(FRP)やステンレス鋼板などの材料から、例えば縦
−約3.6m、横−約1.8m、深さ−約0.6mの大
きさに作成されている。
DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below with reference to the drawings. First, FIGS. 1 and 2 do not discharge seawater (W) until the end of egg removal, and use it as stored water (water stoppage). 1 shows a first embodiment of an egg extractor, wherein (11) is seawater (W).
Is a water tank for storing water from a material such as fiber reinforced plastic (FRP) or a stainless steel plate, for example, a length of about 3.6 m, a width of about 1.8 m, and a depth of about 0.6 m. Have been created.

【0016】(12)は給水ポンプであり、これにより
汲み上げられた海水(W)が、上記水槽(11)に供給
・貯溜されるように、図外のパイプラインを介して配管
されている。(13)はその海水(W)の加温器であっ
て、ボイラーを熱源とする熱交換器から成り、水槽(1
1)内に浸漬されているが、その水槽(11)の外部に
設置しても良く、又熱交換器に代る電熱ヒーターなどを
採用してもさしつかえない。
A water supply pump (12) is provided through a pipeline (not shown) so that seawater (W) pumped by the water supply pump is supplied and stored in the water tank (11). (13) is a heater for the seawater (W), which is composed of a heat exchanger using a boiler as a heat source.
Although it is immersed in 1), it may be installed outside the water tank (11), or an electric heater or the like may be used instead of a heat exchanger.

【0017】又、(13)は上記水槽(11)の外部に
据付けられたオゾン発生機であって、そのオゾン供給管
(15)が水槽(11)内の底部に導入されており、そ
の先端部に付属連通する分散器(16)から、オゾンを
曝気させ得るようになっている。尚、オゾン発生機(1
4)は、その発生オゾン量を調整できること、言うまで
もない。
An ozone generator (13) installed outside the water tank (11) has an ozone supply pipe (15) introduced into the bottom of the water tank (11). Ozone can be aerated from a disperser (16) attached to the section. The ozone generator (1
4) Needless to say, the amount of generated ozone can be adjusted.

【0018】(17)は上記オゾンの曝気された海水
(W)を水槽(11)内の全体に亘って、万遍なく波及
・流動させるための循環ポンプであり、図示の実施例で
はこれを水中ポンプとして、水槽(11)内に浸漬させ
ているが、その水槽(11)の外部に設置することも可
能である。(18)は水槽(11)の排水孔を示してい
る。
Reference numeral (17) denotes a circulation pump for uniformly spreading and flowing the ozone-aerated seawater (W) throughout the water tank (11). The submersible pump is immersed in the water tank (11), but may be installed outside the water tank (11). (18) indicates a drain hole of the water tank (11).

【0019】上記水槽(11)には給水ポンプ(12)
の作動を介して、塩分濃度Sが約31〜34‰の海水
(W)を汲み上げ貯溜させると共に、その海水(W)の
温度が約18〜28℃として維持されるように、上記熱
交換器などの加温器(13)により加温する一方、放卵
させるべき真珠養殖用アコヤ貝(A)を、その一定の単
位量づつ卵抜き篭(19)に収容した状態として、上記
水槽(11)内に浸漬させるのである。
A water supply pump (12) is provided in the water tank (11).
Through the operation, the seawater (W) having a salt concentration S of about 31 to 343 is pumped up and stored , and the temperature of the seawater (W) is maintained at about 18 to 28 ° C. While being heated by a warming device (13), the pearl culture pearl oysters (A) to be spawned are stored in the egg-drawing basket (19) by a fixed unit amount, and the water tank (11) ).

【0020】その海水(W)への浸漬手段としては図示
省略してあるが、水槽(11)の開口上面に横架したハ
ンガーバーから、上記卵抜き篭(19)を水槽(11)
内へ吊り下げても良く、或いは水槽(11)内に仕切り
棚となる簀子を並列設置し、これに卵抜き篭(19)を
載置させてもさしつかえない。
The means for immersion in the seawater (W) is not shown in the drawing, but the egg-drawing basket (19) is connected to the water tank (11) from a hanger bar laid on the upper surface of the opening of the water tank (11).
It is also possible to hang it inside, or to install a jug as a partition in the water tank (11) in parallel and place the egg basket (19) on it.

【0021】何れにしても、上記オゾンがアコヤ貝
(A)の各個に対して、ムラなく均等に投射作用し得る
分布状態に浸漬させる。同様な趣旨から、各卵抜き篭
(19)にはアコヤ貝(A)を詰め過ぎないことも大切
である。
In any case, the ozone is immersed in each of the pearl oysters (A) so as to be able to uniformly and uniformly project. For the same purpose, it is also important not to overfill the pearl oysters (A) in each egg extract basket (19).

【0022】そして、上記オゾン発生機(14)から水
槽(11)内にオゾンを送り込み曝気させると共に、そ
のオゾンの曝気された海水(W)を、上記循環ポンプ
(17)の作動によって水槽(11)内の全体に対流・
循環させるのである。
Then, ozone is sent from the ozone generator (14) into the water tank (11) for aeration, and the ozone-aerated seawater (W) is supplied to the water tank (11) by the operation of the circulation pump (17). )
It circulates.

【0023】そうすれば、上記アコヤ貝(A)が自然海
域での環境条件と同じく、その放卵しやすい水温と塩分
濃度の海水(W)中に浸漬された状態のもとで、しかも
オゾンの曝気による積極的な放卵誘発刺激を受けるた
め、その確実に安定良く放卵し、安楽な準備のもとに効
率良く卵抜き操作できるのである。
In this case, the pearl oyster (A) has a water temperature and a salt content that are easy to spawn, as well as the environmental conditions in the natural sea area.
In a state of being immersed in seawater (W) at a high concentration and receiving aggressive ovulation-inducing stimulus by aeration of ozone, the eggs are steadily and well spawned, and the efficiency is improved with easy preparation Egg removal can be performed well.

【0024】その際、オゾンには海水(W)の殺菌作用
や、その曝気による酸素溶存作用もあるため、アコヤ貝
(A)の活性化に役立ち、その不測な衰弱や死滅なども
効果的に防止することができる。尚、海水(W)の温度
塩分濃度に関する上記数値範囲は、冒頭に述べた経験
から得られたものであり、卵抜き操作する場所や季節な
どの条件次第では、その数値範囲内において調整使用さ
れること言うまでもない。
At this time, ozone has a bactericidal action of seawater (W) and an oxygen-dissolving action by aeration thereof, so that it is useful for activation of the pearl oyster (A), and its unexpected weakness and death can be effectively prevented. Can be prevented. The above numerical ranges regarding the temperature and salt concentration of seawater (W) are obtained from the experience described at the beginning, and may be adjusted and used within the numerical ranges depending on the conditions such as the place where the eggs are removed and the season. Needless to say.

【0025】因みに、水槽(11)における上記した大
きさ寸法との関係上、円筒型のビニール製卵抜き篭(1
9)内へ、14匁以上のアコヤ貝(A)を60個づつ収
容し、その卵抜き篭(19)の18個づつを上下二段と
して水槽(11)内に吊り下げることにより、上記卵抜
き操作を試みた実験結果では、そのオゾンを送り込み曝
気させ始めた午前11時20分から、約1時間経過後に
海水(W)が白濁し初め(放卵の開始)、当日の午後6
時には放卵が完全に止まった。合計2160個のアコヤ
貝がほぼ全部放卵し終えた。
Incidentally, in view of the above-mentioned size and size in the water tank (11), a cylindrical vinyl egg basket (1) is formed.
9) The oyster shells (A) of 14 momes or more are accommodated in 60 pieces each, and the 18 pieces of the egg extract basket (19) are suspended in the water tank (11) as two upper and lower stages. According to the results of the experiment in which the extraction operation was attempted, the seawater (W) began to become cloudy about 1 hour after 11:20 am when the ozone was fed in and aerated (start of spawning), and on the 6
Oviposition sometimes stopped completely. Almost 2160 pearl oysters have finished laying eggs.

【0026】又、上記実験結果によれば、水槽(11)
内の海水(W)にアコヤ貝(A)を馴染ませてから、そ
のオゾンの曝気による卵抜き操作を開始することが、又
海水(W)のため引き潮時よりも満ち潮時が、更に屋外
で卵抜き操作する場合には、水槽(11)を暗くカバー
することが、更に又人工貝よりも天然貝の方が、各々放
卵しやすいことも判明した。
According to the above experimental results, the water tank (11)
After acclimating the pearl oyster (A) to the seawater (W) inside, it is possible to start the egg removal operation by aeration of the ozone. In the case of performing the egg removal operation, it was found that the aquarium (11) was covered darkly and that the natural shellfish were easier to lay eggs than the artificial shellfish.

【0027】何れにしても、上記オゾンの曝気を止める
と、放卵も止まってしまう結果であったため、これが陸
上での人工的な卵抜き操作として、その作用効果を安定
させる上で重要であり、オゾンの曝気がアコヤ貝(A)
に放卵誘発上の有効な刺激となって、その貝(A)の活
性化することに役立つものと考えられる。
In any case, when the ozone aeration is stopped, spawning is also stopped. This is important for stabilizing the operation and effect as an artificial egg removing operation on land. And ozone aeration (A)
It is thought that it becomes an effective stimulus for inducing oviposition and is useful for activating the shellfish (A).

【0028】図3、4は本発明に係る卵抜き装置の第2
実施例を示しており、これでは水槽(11)にオーバー
フロー管(20)も付属設置することによって、その卵
抜き操作中海水(W)を絶えず新しく補給・交換するよ
うになっている。
FIGS. 3 and 4 show a second embodiment of the egg extractor according to the present invention.
In this embodiment, an overflow pipe (20) is attached to the water tank (11) so that seawater (W) is constantly replenished and replaced during the egg removal operation.

【0029】又、循環ポンプ(17)の吐出管(21)
にオゾン発生機(14)からのオゾン供給管(15)を
連通接続して、その吐出管(21)を上記第1実施例の
分散器(16)に代るエアーレーターとして機能させ、
これから水槽(11)内にオゾンを曝気するようになっ
ている。
The discharge pipe (21) of the circulation pump (17)
Is connected to an ozone supply pipe (15) from the ozone generator (14), and the discharge pipe (21) functions as an aerator to replace the disperser (16) of the first embodiment.
From now on, ozone is aerated in the water tank (11).

【0030】このような卵抜き装置を使用するも、海水
(W)の温度と塩分濃度を上記数値範囲内に保てる限
り、安定・確実な卵抜き効果を達成することができる。
第2実施例におけるその他の構成は、上記第1実施例と
実質的に同一であるため、その図3、4に図1、2との
対応符号を記入するにとどめて、その詳細な説明を省略
する。
Even when such an egg removing device is used, a stable and reliable egg removing effect can be achieved as long as the temperature and the salt concentration of the seawater (W) are kept within the above numerical ranges.
Since other configurations in the second embodiment are substantially the same as those in the first embodiment, only the corresponding reference numerals to FIGS. 1 and 2 are entered in FIGS. Omitted.

【0031】海水(W)の塩分濃度を上記数値範囲に保
つ方法としては、岩塩を人工的に投入すれば良い。更
に、その岩塩の添加量を調整したり、上記加温器(1
3)を制御したりすることにより、海水(W)の塩分濃
や温度を意図的に変化させることも、放卵の促進上効
果がある。
As a method for keeping the salt concentration of seawater (W) within the above numerical range, rock salt may be artificially introduced. Further, the addition amount of the rock salt is adjusted, and the above-mentioned heater (1
3) to control the salt concentration of seawater (W).
To intentionally vary the degree and temperature, there is a promotion on the effect of spawning.

【0032】上記水槽(11)を炎天下にさらす如く設
置したり、或いは断熱カバーで被覆したりすることによ
り、その海水(W)の温度を上記数値範囲に維持できる
ならば、その熱交換器や電熱ヒーターなどの加温器(1
3)を省略しても良い。
If the temperature of the seawater (W) can be maintained in the above-mentioned numerical range by installing the water tank (11) under the sun or covering it with a heat insulating cover, the heat exchanger or the heat exchanger can be used. Heater such as electric heater (1
3) may be omitted.

【0033】尚、上記給水ポンプ(12)の設置を省略
して、海水(W)を手作業により水槽(11)へ汲み入
れたり、又卵抜き篭(19)を使用せずに、アコヤ貝
(A)をその裸状態のままで水槽(11)に浸漬させた
りすることも考えられるが、その何れも作業性に劣るの
で、実用上好ましくない。
The installation of the water supply pump (12) is omitted, and the seawater (W) is manually pumped into the water tank (11), and the pearl oysters are not used without using the egg basket (19). Although it is conceivable that (A) is immersed in the water tank (11) in its naked state, all of them are inferior in workability and are not practically preferable.

【0034】[0034]

【発明の効果】以上のように本発明では真珠養殖用アコ
ヤ貝の卵抜き方法として、塩分濃度Sが約31〜34‰
の海水(W)を水槽(11)に貯溜させ、その水温を約
18〜28℃に保った上、卵抜き篭(19)に収容した
アコヤ貝(A)を、上記水槽(11)内へ浸漬させて、
その水槽(11)内へオゾンを送り込み曝気させること
により、上記アコヤ貝(A)に放卵誘発刺激を与えるよ
うになっているため、冒頭に述べた従来技術の課題を完
全に解決することができ、その陸上での安楽な準備作業
を行なえば足りるにも拘らず、上記アコヤ貝(A)の卵
抜き作用を誰でも人工的に安定良く、且つ確実に達成し
得る効果がある。
As described above, according to the present invention, as a method for removing eggs of pearl oysters for pearl culture, the salt concentration S is about 31 to 34 ‰.
Seawater (W) is stored in a water tank (11), the water temperature is maintained at about 18 to 28 ° C., and the pearl oyster (A) stored in the egg-drawing basket (19) is introduced into the water tank (11). Let it soak,
By sending ozone into the aquarium (11) and aerating it, the pearl oyster (A) is stimulated to induce ovulation, so that the problems of the prior art described at the beginning can be completely solved. In spite of the fact that it is sufficient to carry out the easy preparation work on land, anyone can artificially stably and surely attain the egg removing action of the pearl oyster (A).

【0035】殊更、請求項2に記載の卵抜き方法を採用
するならば、そのオゾンの曝気された海水(W)を、水
槽(11)内の全体に強制循環させるようになっている
ため、アコヤ貝(A)の各個にムラなくオゾンによる放
卵誘発上の刺激を効率良く与えることができ、その卵抜
き効果をますます向上させ得るのである。そのオゾンの
曝気と対流・循環の相乗作用により、上記放卵を一層促
進させ、確実な卵抜き効果を達成できるため、冒頭に述
べた篭の移動やその他の重労働も要しない。
In particular, if the egg removing method according to the second aspect is adopted, the seawater (W) aerated with the ozone is forcibly circulated throughout the water tank (11). It is possible to efficiently apply the stimulus for inducing oviposition by ozone to each of the pearl oysters (A) evenly, so that the effect of removing eggs can be further improved. The synergistic effect of the ozone aeration and the convection / circulation further promotes the above-described oviposition and achieves a reliable egg-eliminating effect, so that the basket movement and other heavy labor described at the beginning are not required.

【0036】又、上記方法を実施するための卵抜き装置
として、請求項3の構成を採用するならば、海水(W)
をその水槽(11)へ容易に供給・貯溜させることがで
き、その海水(W)の温度が低下することを、加温器
(13)によって防止することも可能であるため、上記
卵抜き操作をますます省力的に行なえることとなり、そ
の水槽(11)の据付け場所やその他の条件を自由に選
べることとも相俟って、実用性に著しく優れる。
If the configuration of claim 3 is adopted as an egg removing device for carrying out the above method, seawater (W)
Can be easily supplied and stored in the water tank (11), and the temperature of the seawater (W) can be prevented from lowering by the heater (13). In addition to the fact that the installation location and other conditions of the water tank (11) can be freely selected, the practicality is remarkably excellent.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明に係る卵抜き装置の第1実施例を模式化
して示す側断面図である。
FIG. 1 is a side sectional view schematically showing a first embodiment of an egg removing apparatus according to the present invention.

【図2】図1の平面図である。FIG. 2 is a plan view of FIG.

【図3】同じく卵抜き装置の第2実施例を示す側断面図
である。
FIG. 3 is a side sectional view showing a second embodiment of the egg removing device.

【図4】図3の平面図である。FIG. 4 is a plan view of FIG. 3;

【符号の説明】[Explanation of symbols]

(11)・水槽 (12)・給水ポンプ (14)・オゾン発生機 (17)・循環ポンプ (19)・卵抜き篭 (A)・アコヤ貝 (W)・海水 (11) ・ Water tank (12) ・ Water supply pump (14) ・ Ozone generator (17) ・ Circulation pump (19) ・ Egg basket (A) ・ Akoya shellfish (W) ・ Seawater

Claims (3)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】塩分濃度Sが約31〜34‰の海水(W)
を水槽(11)に貯溜させ、その水温を約18〜28℃
に保った上、卵抜き篭(19)に収容したアコヤ貝
(A)を、上記水槽(11)内へ浸漬させて、その水槽
(11)内へオゾンを送り込み曝気させることにより、
上記アコヤ貝(A)に放卵誘発刺激を与えることを特徴
とする真珠養殖用アコヤ貝の卵抜き方法。
1. Seawater (W) having a salt concentration S of about 31 to 34 ‰.
Is stored in a water tank (11), and the water temperature is about 18 to 28 ° C.
The pearl oyster (A) housed in the egg basket (19) is immersed in the water tank (11), and ozone is fed into the water tank (11) for aeration.
A method for removing eggs of pearl oysters for pearl culture, which comprises providing the pearl oysters (A) with an oviposition-inducing stimulus.
【請求項2】塩分濃度Sが約31〜34‰の海水(W)
を水槽(11)に貯溜させ、その水温を約18〜28℃
に保った上、卵抜き篭(19)に収容したアコヤ貝
(A)を、上記水槽(11)内へ浸漬させて、その水槽
(11)内へオゾンを送り込み曝気させると共に、水槽
(11)内の全体に強制循環させることにより、上記ア
コヤ貝(A)に放卵誘発刺激を与えることを特徴とする
真珠養殖用アコヤ貝の卵抜き方法。
2. Seawater (W) having a salt concentration S of about 31 to 34 ‰.
Is stored in a water tank (11), and the water temperature is about 18 to 28 ° C.
The pearl oysters (A) housed in the egg basket (19) are immersed in the water tank (11), and ozone is fed into the water tank (11) for aeration and the water tank (11) A method for removing eggs of pearl oysters for pearl culture, wherein the pearl oysters (A) are stimulated to induce oviposition by forcibly circulating them throughout the inside.
【請求項3】海水(W)の汲み上げ用給水ポンプ(1
2)と、その汲み上げた海水(W)の貯溜用水槽(1
1)と、その水槽(11)内での海水循環ポンプ(1
7)と、同じく水槽(11)に連通接続されたオゾン発
生機(14)と、上記海水(W)の温度を約18〜28
℃に保つ熱交換器や電熱ヒーターなどの加温器(13)
と、アコヤ貝(A)を収容する卵抜き篭(19)とから
成り、 上記水槽(11)に塩分濃度Sが約31〜34‰の海水
(W)を貯溜させ、その水中にアコヤ貝(A)を収容し
た卵抜き篭(19)を浸漬させた状態において、上記オ
ゾン発生機(14)から水槽(11)内へオゾンを送り
込み曝気させると共に、上記循環ポンプ(17)により
強制循環させるように定めたことを特徴とする真珠養殖
用アコヤ貝の卵抜き装置。
3. A water supply pump (1) for pumping seawater (W).
2) and a tank (1) for storing the pumped seawater (W)
1) and a seawater circulation pump (1) in the water tank (11).
7), an ozone generator (14) also connected to the water tank (11), and a temperature of the seawater (W) of about 18 to 28.
Heaters (13) such as heat exchangers and electric heaters that maintain the temperature in ° C
And an egg basket (19) for accommodating the pearl oyster (A). The water tank (11) stores the seawater (W) having a salt concentration S of about 31 to 34 ‰ , and the pearl oyster ( In a state where the egg extract basket (19) containing A) is immersed, ozone is sent from the ozone generator (14) into the water tank (11) for aeration and forced circulation by the circulation pump (17). An oyster extractor for pearl pearl oysters, characterized in that:
JP6185259A 1994-07-13 1994-07-13 Method and apparatus for removing eggs from pearl oysters for pearl culture Expired - Lifetime JP2597956B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6185259A JP2597956B2 (en) 1994-07-13 1994-07-13 Method and apparatus for removing eggs from pearl oysters for pearl culture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6185259A JP2597956B2 (en) 1994-07-13 1994-07-13 Method and apparatus for removing eggs from pearl oysters for pearl culture

Publications (2)

Publication Number Publication Date
JPH0823818A JPH0823818A (en) 1996-01-30
JP2597956B2 true JP2597956B2 (en) 1997-04-09

Family

ID=16167697

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6185259A Expired - Lifetime JP2597956B2 (en) 1994-07-13 1994-07-13 Method and apparatus for removing eggs from pearl oysters for pearl culture

Country Status (1)

Country Link
JP (1) JP2597956B2 (en)

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JP5068692B2 (en) * 2008-05-14 2012-11-07 東亜建設工業株式会社 Clam artificial spawning apparatus and method
JP6386827B2 (en) * 2014-08-01 2018-09-05 木更津漁業協同組合 Artificial fertilization method for clams
CN108901937A (en) * 2018-06-19 2018-11-30 浙江省海洋水产研究所 A kind of Sepiella maindroni germplasm is aestivated the device and its operating method of relay preservation
CN112753628A (en) * 2021-02-03 2021-05-07 北海市振发海洋产业科技有限公司 Basket-sinking wind wave resistant breeding method for oysters

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Publication number Priority date Publication date Assignee Title
CN103782941A (en) * 2014-02-26 2014-05-14 浙江海洋学院 Demersal fish egg incubator
CN103782941B (en) * 2014-02-26 2015-09-30 浙江海洋学院 Heavy property fish hatcher

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