WO2013120322A1 - 短蛸室外土池人工繁殖方法 - Google Patents

短蛸室外土池人工繁殖方法 Download PDF

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Publication number
WO2013120322A1
WO2013120322A1 PCT/CN2012/074415 CN2012074415W WO2013120322A1 WO 2013120322 A1 WO2013120322 A1 WO 2013120322A1 CN 2012074415 W CN2012074415 W CN 2012074415W WO 2013120322 A1 WO2013120322 A1 WO 2013120322A1
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Prior art keywords
breeding
water
outdoor
parental
enclosure
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PCT/CN2012/074415
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English (en)
French (fr)
Inventor
王卫军
杨建敏
郑小东
周全利
李琪
董根
刘相全
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山东省海洋水产研究所
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Publication of WO2013120322A1 publication Critical patent/WO2013120322A1/zh

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    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01KANIMAL HUSBANDRY; CARE OF BIRDS, FISHES, INSECTS; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K61/00Culture of aquatic animals
    • A01K61/10Culture of aquatic animals of fish
    • A01K61/17Hatching, e.g. incubators
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01KANIMAL HUSBANDRY; CARE OF BIRDS, FISHES, INSECTS; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K61/00Culture of aquatic animals
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01KANIMAL HUSBANDRY; CARE OF BIRDS, FISHES, INSECTS; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K61/00Culture of aquatic animals
    • A01K61/70Artificial fishing banks or reefs
    • 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

Definitions

  • the invention belongs to the technical field of aquaculture, and in particular relates to a method for artificially reproducing outdoor soil pools.
  • Octopus ocellatus Gray belongs to the genus Cephalopoda, Octopoda, Octopodidae, and Octopus. China's north and south coasts are distributed. The main groups inhabit the temperate northerly seas, with large yields in the Yellow Sea and Bohai Sea. Qingdao, Yantai, Weihai in Shandong, Dalian, Yingkou in Liaoning, and Laoting in Hebei have more production. One of the most important economic species in the genus. In recent years, with the increase of fishing intensity, the natural resources and germplasm genetic diversity of short sorghum are facing increasingly serious damage. At the same time, short-lived fresh foods, dried products and processed products all have a wide market at home and abroad. With the increasing consumption and export demand in the domestic market, the demand for short-term oysters has also increased year by year.
  • Short-breeding farming has not yet been industrialized in China. The main reason is that the source of seedlings is completely dependent on natural fishing. Therefore, it is extremely urgent to carry out large-scale artificial breeding and breeding of short hoes. Effective measures. At present, as a new breed of northern culture, short-selling carp has a fast growth rate, and can reach the product specifications of more than 60g in half a year, which is favored by the majority of farmers. How to provide a scientific and effective artificial breeding method for short-soil ponds has become an urgent need for large-scale farmers.
  • the present invention provides a scientific and effective artificial propagation method for short-soil outdoor soil pools.
  • the present invention is achieved by the following technical solutions: a method for artificially reproducing outdoor soil pools in short rafts, It includes the following steps:
  • the cultivating water of the parental enclosure is surrounded by a polyethylene mesh having a mesh diameter of 0. 5 ⁇ 0. 8cm;
  • the value of the shellfish is used as a living bait, and according to the feeding amount of 3 to 5 live small crabs per relative per day, when the brood is found to have spawned, the small crabs are no longer fed.
  • the low value shellfish refers to low-priced shellfish, such as tetrachaea, which refers to crabs with low market price, and the crab weight is 10 to 50 grams;
  • a large protozoa filter with a mesh number of 100 to 120 is placed at the water inlet and the drain of the earthen pond, and the large protozoa are collected by filtration as a live bait for the early larvae.
  • the large protozoa refers to copepods and cladocerans that are visible to the naked eye and have a body length of about 1 mm; further, using natural water culture, the daily exchange rate of seawater in the earthen pond is 5 to 20%, water inlet and drainage.
  • the mouth is provided with an anti-escape net with a mesh number of 5 to 20 mesh, and the natural water does not need to extract seawater by power, and the seawater can flow directly from the high reservoir to the outdoor earthen pond;
  • the first ratio of the ratio of the area of the parental water pool to the area of the outdoor soil pool is 0. 08 ⁇ 0. /m 2 ;
  • the tile is placed in the parental enclosure cultivation water to form a shelter (4) for the attachment of the relatives and the fertilized eggs, and the shelter is stacked in the water inlet direction; Further, the shelter is bundled with three flat tiles for construction, and is stacked in the earth pool along the water inlet direction to prevent the water from flowing over the shelter, and the row spacing is 3 meters.
  • the beneficial effects of the invention are as follows:
  • the breeding technique of the invention has the characteristics of high survival rate of larvae, low breeding cost, high benefit, simple method and easy management, and is suitable for breeding and breeding of coastal open-pit soil pools.
  • the invention can obviously improve the yield of short sputum and obtain high economic benefits.
  • the invention realizes large-scale artificial propagation of short scorpion by designing an outdoor breeding soil pool, establishing a breeding area for short cockroaches, and effectively controlling the brooding of the broodstock, the hatching of the fertilized eggs and preventing the escape of the larvae.
  • the promotion of this technology is very important for the realization of short-scale large-scale artificial breeding and breeding.
  • the invention overcomes the habitat and nutrient supply problems of the short-breeding brood breeding season by setting up the establishment of the parental enclosure to cultivate the water area, controlling the time of the scorpion corpuscles and the proportion of males and females, providing relatives to burrowing places and preventing escape. After the end of the breeding period of the short scorpion, the death of the parent causes the water body to deteriorate. At the same time, according to the primary productivity of the earthen pond and the relationship of the food chain, low-value shellfish and low-quality crustaceans are released one-time or multiple times, and the short-lived and live-biological bait are grown simultaneously to ensure the supply of the daily bait of the parent. After the fertilized eggs are hatched, large protozoa can be fed to them, and these measures result in high quality and good economic benefits of the fertilized eggs.
  • FIG. 1 is a schematic longitudinal sectional structural view of an earthen pond of an artificial outdoor propagation method of a short shovel outdoor
  • FIG. 2 is a schematic cross-sectional structural view of a soil shoal of an artificial outdoor propagation method of a short shovel according to the present invention
  • FIG. 4 is a schematic view showing the arrangement of the shelter in the earthen pond by the artificial propagation method of the outdoor soil pool of the short raft;
  • Fertilized eggs hatching Under the care of relatives The fertilized eggs hatch out the pups for 45 days, and then the relatives that have already laid eggs are successively removed. The pups are naturally distributed to the earthen ponds through the pores of the polyethylene net 2, and the juveniles are cultivated. Management; further, set the net at the water inlet and drain 7 A large-scale protozoa filter 6 with a mesh size of 100 is used to collect large protozoa by filtration, as a live bait for early larvae.
  • the daily exchange rate of seawater in the earthen pond 1 is 10%
  • the water inlet and the drain port 7 are provided with an escape net 5 and a large protozoa filter net 6, and the screen mesh of the escape net 5 is At 10 mesh, the mesh number of the large protozoan filter 6 is 100 mesh.
  • the ratio of the area of the area of the parental water pool 3 to the area of the outdoor soil pool 1 is 1:50, and the ratio of the number of the parent body to the area of the outdoor soil pool 1 is 0.1 head/m 2 .
  • flat tiles for construction are placed as shelters 4 for the relatives to inhabit and fertilized eggs, and the shelters 4 are stacked in the direction of water inlet.
  • the shelter 4 is triangularly bundled with three flat tiles 9 for construction, and is stacked in the earth pool 1 along the water inlet direction with a line spacing of 3 meters.
  • Example 2 As shown in FIG. 1 to FIG. 4, an artificial propagation method of a short-span outdoor soil pool 1 is carried out by artificial sea pool 1 seawater. The depth of the seawater is 2. 5 m, and the soil pool 1 is 10000 m%.
  • the polyethylene mesh 2 having a diameter of 0.5 cm encloses a parental enclosure of 200 m 2 to cultivate the waters 3, and the shelter 4 is arranged in the earthen pond 1 to facilitate the intimate habitation and attachment of the fertilized eggs, and the prevention of the drainage port 7 Escape net 5 and large protozoa filter net 6, through the switch of the gate 8 natural water culture, the daily exchange rate of seawater in the earth pool 1 is 10%, the mesh number of the anti-fighting net 5 is 10 mesh, the large protozoa filter net 6 The number of meshes is 100 mesh. On April 10, 2010, a low-value tetragonal scorpion was introduced as a live bait for the parent.
  • Embodiment 3 As shown in FIG. 1 to FIG. 4, an artificial propagation method of a short concrete outdoor soil pool 1 adopts a artificial soil pool 1 seawater culture method, the depth of the sea pool 1 is 2 m, the soil pool 1 area is 4000 m 2 , and the diameter of the mesh is passed. 0.
  • 6cm of polyethylene mesh 2 encloses 200 m 2 of parental enclosure to cultivate water 3, and set up shelter 4 in earthen pond 1 to facilitate relative habitat and fertilized egg attachment, and set up anti-escape net 5 and large at the drain 7
  • the protozoa filter net 6 is naturally cultured by the switch of the gate 8, the daily exchange rate of seawater in the earthen pond 1 is 5%, the number of meshes of the escape net 5 is 20 mesh, and the number of meshes of the large protozoan filter 6 is 110. Head. On April 10, 2010, a low-value tetragonal scorpion was introduced as a live bait for the parent.
  • Embodiment 4 As shown in FIG. 1 to FIG. 4, an artificial propagation method of a short concrete outdoor soil pool 1 adopts a artificial soil pool 1 seawater culture method, the depth of the seawater of the soil pool 1 is 3 m, and the area of the soil pool 1 is 14,000 m 2 , and the diameter of the mesh is passed. 0.

Abstract

一种短蛸室外土池人工繁殖方法,其包括下述步骤:a、设置繁育隔离区,b、短蛸亲体的投放和亲体促熟,c、受精卵孵化。本养殖技术具有幼体成活率高、养殖成本低、效益高、方法简单和易于管理的特点,适用于沿海露天土池短峭繁殖使用。本方法可明显提高短蛸产量,获得较高的经济效益。通过对室外繁育土池进行设计,建立短蛸亲体的围隔繁育区,并对亲体进行促熟、受精卵孵化以及防止幼体逃逸等环节进行有效控制,来实现短蛸的规模化人工繁殖。该技术的推广对于实现短蛸规模化人工繁育和养殖具有非常重要的意义。

Description

说 明 书
短蛸室外土池人工繁殖方法
技术领域
本发明属于水产养殖技术领域,具体的说是涉及一种短蛸室外土池人工 繁殖方法。
背景技术
短蛸 ( Octopus ocellatus Gray, 1849 ) 属软体动物头足纲 (Cephalopoda)、 八腕目 (Octopoda)、 肖禾斗 (Octopodidae)、 肖属 (Octopus)。 我国南北沿海均有分布, 主要群体栖居于温带偏北海域, 在黄、 渤海产量较 大, 山东的青岛、 烟台、 威海, 辽宁的大连、 营口, 河北的乐亭产量较多, 是我国北部沿海蛸类中最重要的经济种之一。近年来随着渔业捕捞强度的加 大, 短蛸的自然资源和种质遗传多样性正面临着日益严重的破坏。 同时, 短 蛸的生鲜品、 干品及加工品均具有广阔的海内外市场, 随着国内市场消费和 出口需求的日益增大, 人们对短蛸的需求量也逐年增大。
短蛸养殖在我国还未能形成产业化, 其主要原因是由于苗种来源完全依 赖于天然捕捞, 因此, 开展短蛸大规模人工繁育和养殖迫在眉睫, 开展土池 人工繁殖是一种解决苗种来源行之有效的措施。 目前, 短蛸作为北方养殖的 新品种, 其生长速度快, 半年就可达到每只 60g以上的商品规格, 受到广大 养殖户的青睐。如何能够提供一种科学有效的短蛸土池人工繁殖方法成为广 大短蛸养殖户的迫切需求。
发明内容
本发明为了克服现有技术存在的不足,提供一种科学有效的短蛸室外土 池人工繁殖方法。
本发明是通过以下技术方案实现的: 一种短蛸室外土池人工繁殖方法, 其包括下述步骤:
a、 设置繁育隔离区:
采用室外人工土池海水的养殖方式, 土池海水的深度为 2〜3m, 用网目 直径为 0. 5〜0. 8cm的聚乙烯网围出亲体围隔培育水域;
b、 短蛸亲体的投放和亲体促熟:
当室外土池的水温 12 °C时, 将体重 80g及以上的雌雄亲体按照雌: 雄 =3: 1的比例投放于所述亲体围隔培育水域; 提前在所述亲体围隔培育水域 投放一些低值的贝类作为活体饵料, 并且按照每只亲蛸每天 3〜5只活体小 杂蟹的投喂量进行投喂, 当发现有亲体开始产卵后, 不再投喂小杂蟹。 所述 低值的贝类指的是价格低的贝类, 如四角蛤蜊, 所述小杂蟹指的是市场上价 格低的蟹类, 蟹体重 10〜50克;
c、 受精卵孵化:
在亲蛸的看护下, 受精卵经 40〜50天孵化出稚蛸, 然后陆续捞出已经 产卵的亲蛸, 幼蛸则透过所述聚乙烯网的孔自然分布到土池各处, 对幼蛸进 行养成阶段的管理;
进一步, 在土池的进水口和排水口处设置网目数为 100〜120 目的大型 原生动物过滤网, 过滤收集大型原生动物, 作为幼体早期的活体饵料。 所述 大型原生动物指的是肉眼可见、 体长 1mm左右的桡足类和枝角类原生动物; 进一步, 采用自然纳水养殖, 土池内海水的日交换率为 5〜20%, 进水口 和排水口均设置防逃网其目数为 5〜20目,所述自然纳水为不需要通过动力 提取海水, 海水可以直接从高处的蓄水池流向室外土池;
进一步,所述亲体围隔培育水域的面积与室外土池繁育水域的面积之比 为 1 : 20〜1: 70, 亲体头数与室外土池繁育水域的面积之比为 0. 08〜0. 1 头 /m2 ;
进一步,在亲体围隔培育水域投放瓦片做成供亲蛸栖息和受精卵的附着 的遮蔽物 (4), 所述遮蔽物沿进水方向堆砌; 进一步, 所述遮蔽物采用三张建筑用平瓦片呈三角形捆扎, 顺着进水方 向堆砌于土池内, 防止水流将遮蔽物冲倒,行间距为 3米,所述建筑用瓦片, 一般是指尺寸为 400 X 240〜360 X 220毫米左右的瓦片;
本发明的有益效果是: 本发明的养殖技术具有幼体成活率高、 养殖成本 低、 效益高、 方法简单和易于管理的特点, 适用于沿海露天土池短蛸繁殖使 用。 本发明可明显提高短蛸产量, 获得较高的经济效益。 本发明通过对室外 繁育土池进行设计, 建立短蛸亲体的围隔繁育区, 并对亲体进行促熟、 受精 卵孵化以及防止幼体逃逸等环节进行有效控制, 来实现短蛸的规模化人工繁 殖。 该技术的推广对于实现短蛸规模化人工繁育和养殖具有非常重要的意 义。
本发明通过设置建立亲体围隔培育水域,控制短蛸亲体的投放时间和雌 雄比例、 提供亲蛸穴居场所以及防止逃逸等技术, 即满足了短蛸亲体繁殖季 节的栖息和营养供应问题, 又克服短蛸亲体繁殖期结束后, 死亡亲体导致水 体变坏的问题。 同时, 根据土池的初级生产力和食物链关系, 一次性或多次 性投放低值贝类和低质甲壳类, 短蛸与活体生物饵料同步生长, 保证了亲体 日常饵料的供应。 受精卵孵化以后, 可对其投喂大型原生动物, 这些措施使 得受精卵的质量高, 经济效益好。 附图说明
图 1为本发明短蛸室外土池人工繁殖方法的土池纵向剖面结构示意图; 图 2为本发明短蛸室外土池人工繁殖方法的土池横向剖面结构示意图; 图 3为本发明短蛸室外土池人工繁殖方法的遮蔽物立体结构示意图; 图 4 为本发明短蛸室外土池人工繁殖方法土池内遮蔽物摆放结构示意 图;
图中: 1-土池; 2-聚乙烯网; 3-亲体围隔培育水域; 4-遮蔽物; 5-防逃 网; 6-大型原生动物过滤网; 7-排水口; 8-闸门; 9-建筑用平瓦片。 具体实施方式
以下结合附图和具体实施例对本发明作详细描述。
实施例 1 : 如图 1至图 4所示, 一种短蛸室外土池 1人工繁殖方法, 其 包括下述步骤: a、 繁育隔离区的设置: 采用室外人工土池 1海水的养殖方 式,土池 1海水的深度为 3m,用网目直径为 0. 8cm的聚乙烯网 2围出亲体围 隔培育水域 3 ; b、短蛸亲体的投放和亲体促熟: 当室外土池 1的水温 12 °C 时, 将体重 80g及以上的雌雄亲体按照雌: 雄 =3 : 1的比例投放于所述亲体 围隔培育水域 3 ; 提前在所述亲体围隔培育水域 3投放一些低值的贝类作为 活体饵料, 按照每只亲蛸每天 5只活体小杂蟹的投喂量进行投喂, 当发现有 亲体开始产卵后, 不再投喂小杂蟹; c、 受精卵孵化: 在亲蛸的看护下, 受 精卵经 45天孵化出幼蛸, 然后陆续捞出已经产卵的亲蛸, 幼蛸则透过所述 聚乙烯网 2的孔自然分布到土池 1各处, 对幼蛸进行养成阶段的管理; 进一 步, 在进水口和排水口 7处设置网目数为 100目的大型原生动物过滤网 6, 过滤收集大型原生动物, 作为幼体早期的活体饵料。 进一步, 采用自然纳水 养殖, 土池 1内海水的日交换率为 10%, 进水口和排水口 7均设置防逃网 5 和大型原生动物过滤网 6, 防逃网 5的筛网目数为 10目,大型原生动物过滤 网 6的网目数为 100目。所述亲体围隔培育水域 3的面积与室外土池 1繁育 水域的面积之比为 1 : 50,亲体头数与室外土池 1繁育水域的面积之比为 0. 1 头 /m2。 在亲体围隔培育水域 3投放建筑用平瓦片做成供亲蛸栖息和受精卵 的附着的遮蔽物 4, 遮蔽物 4沿进水方向堆砌。 所述遮蔽物 4采用三张建筑 用平瓦片 9呈三角形捆扎, 顺着进水方向堆砌于土池 1内, 行间距为 3米。 实施例 2 : 如图 1至图 4所示, 一种短蛸室外土池 1人工繁殖方法, 采 用人工土池 1海水养殖方式, 土池 1海水深度为 2. 5m, 土池 1面积 10000 m% 通过网孔直径 0. 5cm的聚乙烯网 2围出 200 m2的亲体围隔培育水域 3, 在土池 1设置遮蔽物 4, 便于亲蛸栖息和受精卵附着, 在排水口 7处设置防 逃网 5和大型原生动物过滤网 6, 通过闸门 8的开关自然纳水养殖, 土池 1 内海水日交换率 10%, 防逃网 5的网目数为 10 目, 大型原生动物过滤网 6 的网目数为 100目。 2010年 4月 10日投放低值的四角蛤蜊作为亲体的活体 饵料, 同年 5月 12日在水温 16. 2 °C时, 在划定的亲体围隔培育水域 3投放 短蛸亲体 800头, 其中雌性个体 600头, 雄性个体 200头, 每天投喂 3000 只活体小杂蟹。 实施例 3 : 如图 1至图 4所示, 一种短蛸室外土池 1人工繁殖方法, 采 用人工土池 1海水养殖方式, 土池 1海水深度为 2m, 土池 1面积 4000 m2, 通过网孔直径 0. 6cm的聚乙烯网 2围出 200 m2的亲体围隔培育水域 3, 在土 池 1设置遮蔽物 4, 便于亲蛸栖息和受精卵附着, 在排水口 7处设置防逃网 5和大型原生动物过滤网 6, 通过闸门 8的开关自然纳水养殖, 土池 1内海 水日交换率 5%, 防逃网 5的网目数为 20目, 大型原生动物过滤网 6的网目 数为 110目。 2010年 4月 10日投放低值的四角蛤蜊作为亲体的活体饵料, 同年 5月 12日在水温 16. 2 °C时, 在划定的亲体围隔培育水域 3投放短蛸亲 体 800头, 其中雌性个体 600头, 雄性个体 200头, 每天投喂 3000只活体 小杂蟹。 实施例 4: 如图 1至图 4所示, 一种短蛸室外土池 1人工繁殖方法, 采 用人工土池 1海水养殖方式, 土池 1海水深度为 3m, 土池 1面积 14000 m2 , 通过网孔直径 0. 8cm的聚乙烯网 2围出 200 m2的亲体围隔培育水域 3, 在土 池 1设置遮蔽物 4, 便于亲蛸栖息和受精卵附着, 在排水口 7处设置防逃网 5和大型原生动物过滤网 6, 通过闸门 8的开关自然纳水养殖, 土池 1内海 水日交换率 20%, 防逃网 5的网目数为 5目, 大型原生动物过滤网 6的网目 数为 120目。 2010年 4月 10日投放低值的四角蛤蜊作为亲体的活体饵料, 同年 5月 12日在水温 16. 2 °C时, 在划定的亲体围隔培育水域 3投放短蛸亲 体 800头, 其中雌性个体 600头, 雄性个体 200头, 每天投喂 3000只活体 小杂蟹。 最后应当说明的是, 以上内容仅用以说明本发明的技术方案, 而非对本 发明保护范围的限制,本领域的普通技术人员对本发明的技术方案进行的简 单修改或者等同替换, 均不脱离本发明技术方案的实质和范围。

Claims

权 利 要 求 书
1、 一种短蛸室外土池人工繁殖方法, 其特征在于: 其包括下述步骤: a、 设置繁育隔离区:
采用室外人工土池海水的养殖方式, 土池(1)海水的深度为 2〜3m, 用 网目直径为 0.5〜0.8cm的聚乙烯网 (2) 围出亲体围隔培育水域 (3);
b、 短蛸亲体的投放和亲体促熟:
当室外土池 (1) 的水温 12°C时, 将体重 80g及以上的短蛸亲体按照 雌: 雄 =3: 1的比例投放于所述亲体围隔培育水域 (3); 提前在所述亲体围 隔培育水域 (3) 投放一些低值的贝类作为活体饵料, 并且按照每只亲蛸每 天 3〜5只活体小杂蟹的投喂量进行投喂, 当发现有亲体开始产卵后, 不再 投喂小杂蟹;
c、 受精卵孵化:
在亲蛸的看护下, 受精卵经 40〜50天孵化出幼蛸, 然后从亲体围隔培 育水域 (3) 陆续捞出已经产卵的亲蛸, 幼蛸则透过所述聚乙烯网 (2) 的孔 自然分布到土池 (1) 各处, 对幼蛸进行养成阶段的管理。
2、 根据权利要求 1所述的短蛸室外土池人工繁殖方法, 其特征在于: 在土池 (1) 的进水口和排水口 (7) 处设置网目数为 100〜120 目的大型原 生动物过滤网 (6), 过滤收集大型原生动物, 作为幼体早期的活体饵料。
3、 根据权利要求 1所述的短蛸室外土池人工繁殖方法, 其特征在于: 采用自然纳水养殖, 土池 (1) 内海水的日交换率为 5〜20%, 进水口和排水 口 (7) 均设置防逃网 (5) 其目数为 5〜20目。
4、 根据权利要求 1所述的短蛸室外土池人工繁殖方法, 其特征在于: 所述亲体围隔培育水域(3) 的面积与室外土池 (1)繁育水域的面积之比为 1: 20〜1:70, 亲体头数与室外土池 (1) 繁育水域的面积之比为 0.08〜0.1 头 /m2
5、 根据权利要求 1至 4任一所述的短蛸室外土池人工繁殖方法, 其特 征在于: 在亲体围隔培育水域 (3 ) 投放瓦片做成供亲蛸栖息和受精卵的附 着的遮蔽物 (4), 所述遮蔽物 (4) 沿进水方向堆砌。
6、 根据权利要求 5所述的短蛸室外土池人工繁殖方法, 其特征在于: 所述遮蔽物 (4 )采用三张建筑用平瓦片 (9 ) 呈三角形捆扎, 顺着进水方向 堆砌于土池 (1 ) 内, 行间距为 3米。
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