New Participation in Onshore Aquaculture. Scallop farming Youtube.

Regarding land-based aquaculture, including scallops, which are newly participating

Scallop Farming Youtube

https://www.youtube.com/results?search_query=%E3%81%BB%E3%81%9F%E3%81%A6%E9%A4%8A%E6%AE%96

https://www.youtube.com/results?search_query=%E3%81%BB%E3%81%9F%E3%81%A6%E9%A4%8A%E6%AE%96

https://hotateouji.com/3058/

2022/06/19  Last Modified :2022/06/19 scallop prince

Land-based aquaculture has become a common topic recently.

Land-based aquaculture is the construction of artificial tanks on land to cultivate fish and shellfish. Marine aquaculture is difficult for new entrants due to demarcated fishing rights, and there are many restrictions. In that respect, it can be said that land-based aquaculture is easier for newcomers to enter than marine aquaculture.

The greatest advantage of land-based aquaculture is that it is possible to artificially manage fisheries and water currents, making it less susceptible to the effects of the natural environment, and facilitating smart fishing.

In land-based aquaculture, the water in the breeding tank is drawn from nearby seas or rivers and constantly poured into it. There are two types of "closed circulation type".

The free-flowing type requires facilities to be constructed in coastal areas or near rivers where it is possible to pull in nearby, but since the necessary facilities are few, the initial investment cost is lower than that of the closed circulation type. However, since it is more susceptible to the external environment than the closed type, it is necessary to respond immediately if the water quality of the sea or river where it is pulled in changes. It is also necessary to take measures against diseases such as fish diseases derived from the external environment.

The closed circulation system has no restrictions on the location of the facility, and basically can be operated anywhere as long as the facility is prepared in any area.

Since breeding water is reused, it also has the advantage of reducing the environmental burden caused by leftover food, excrement, and death. Almost all breeding environments are managed mechanically, allowing us to produce a variety of seafood regardless of the season or location.

On the other hand, the necessary facilities are diverse, and the running costs such as fuel costs and electricity costs to maintain the water temperature are high, so the overall cost is still high.

↓ Land-farmed salmon from “FRD Japan”, which is run by former Mitsui & Co., Ltd., is famous.

FRD Japan - Producer of Land-Farmed Salmon "Okasodachi"

Land-farmed raw salmon from Chiba Prefecture. “Okasodachi” salmon raised in land-based aquaculture in Chiba Prefecture. You can enjoy the freshness unique to "domestic raw" all year round. Antibiotic-free and ASC-certified…

FRD Japan Official Website - Producer of Land-Farmed Salmon "Okasodachi"

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https://www.hro.or.jp/list/fisheries/marine/o7u1kr000000cf7h.html

Home  > Scallop: Scallop farming (seed production)

Scallop: Scallop farming (seed production)

Table of contents on page

• Fishery information
  
• Target fish information
  
• State of fishery
  
• Propagation and management
  
• see in pictures

Fishery information

Classification of fishing permits, etc.	Type 1 demarcated fishery
Main operating area	Rumoi, Abashiri, Soya Promotion Bureau Jurisdiction
Place of coverage	Mashike Town and Kodaira Town under the jurisdiction of the Rumoi Promotion Bureau
fishing ground	40m to 60m water depth
fishing gear	A complete set of aquaculture materials Seedling machine: Consists of inner net (2 sheets of 40 x 80 cm size) and outer net, both materials are netron net and 2 bags of seedling machine are connected as a set of 15 to 20 sets. Hanging cage: Pearl net cage (commonly known as Zabuton cage), mesh size is 7 to 2 minutes (2.1 to 6.1 mm) for provisional dispersion, and 2 minutes to 3 minutes (7.6 to 9.1 mm) for final dispersion. 15 to 17 baskets are connected and the rope of the aquaculture facility for suspending the seed collector and the breeding cage is fixed with a 10-ton block. A fishing crane for lifting the seed collector and the breeding cage
fishing season	March to May
fishing boat size	Less than 10 tons, 19 tons
Shipment form	Seeds for release, packed in 20 kg fish box

Target fish information

Standard Japanese name	scallop
English name	giant ezo scallop, Japanese scallop
subject	Oysters Oysteridae
scientific name	Mizuhopecten yessoensis (Jay)
Common name, local name	Scallops, young clams
bycatch fish	none
Main production area in Hokkaido	North Sea of ​​Japan, Sea of ​​Okhotsk

State of fishery

 In scallop aquaculture (seedling production), natural scallop larvae that are born around April are attached to a seedling collector, and juveniles are collected and cultivated. Depending on the results of various surveys, the hanging seedling harvester is installed around mid-May every year, and this is also the most important thing in scallop farming.
 Juvenile clams attached to the seedling collector are temporarily housed in breeding cages from mid-July to early August to avoid starfish feeding damage. After that, from mid-September to early October, they are replaced with large-mesh breeding baskets (pearl nets: Zabuton baskets) to reduce the storage density and grow until shipment.
 During the breeding period, work to add buoyancy and patrols of the farming facility are carried out twice a month to prevent the growing cages from sinking to the seabed due to the weight of grown scallops and attached organisms.
 Shipping work will begin around March next year. The landed scallops are inspected after being removed from the growing baskets, packed in fish boxes for shipping, and loaded onto refrigerated trucks. After that, they are mainly released into the scallop stocking fishing grounds in the Sea of ​​Okhotsk. In addition, scallop aquaculture is an important fishery in most areas, and is also an important local industry due to the large number of employees engaged in it.

Propagation and management

 Scallop aquaculture technology has been established, but the marine environment changes every year, so we manage our aquaculture facilities while paying attention to changes in the ocean and weather. Scallops, which are produced as seeds for release, are particularly important for stable supply and healthy seedlings, so efforts are being made to promote growth and suppress the appearance of abnormal shells.
 In addition, since it is most important to secure the necessary amount of attached juvenile shellfish by natural seedling collection, we are accumulating surveys and research every day.

see in pictures

Fishing Gear/Facilities

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  Seedling device: Make two layers of Netron net with different meshes.

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  Seedling device facility drawing: This is the facility drawing where the seedling device hangs down.

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  Zabuton cage facility diagram: Facility diagram for hanging zabuton (raising cage).

• Next

Collecting seedlings

 In May, when the scallops are attached, the seedling collector is put in. In July, we withdraw the seedling collectors and secure young clams.

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  Seedling machine making: Seedling machine for collecting natural juvenile clams

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  Laying the seed collector: Drop the seed collector.

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  Landing 1: This is a seedling collector with juvenile clams attached.

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  Unloading 2: Carry to work station.

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Temporary dispersion

Dispersion work is skillful and requires a lot of manpower to sort out a large number of scallop spats.
Dispersal work in the summer and fall draws crowds and brings the beach to life. 　

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  Seedling device: Seedling device with attached scallop spat.

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  Net separation 1: Suspend the seed collector and remove the rubber of the outer net and take out the inner net.

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  Mesh separation 2: Spread the inner mesh.

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  Juvenile clam sieving machine 1: A machine is used to screen out juvenile clams.

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  Young shellfish sieve machine 2: Removes adhering substances by vibration.

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  Juvenile clam sieve machine 3: By introducing this machine, the work progresses more efficiently.

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  Washing: Wash the sieved juvenile clams in a basin to remove impurities.

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  Juvenile shellfish sorting: Juvenile shellfish are sorted in a sorter, and only large ones are used.

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  Containment: Selected spat are placed in nursery cages.

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  Drooping 1: Juvenile clams housed in cages are carried to the drooping facility while sprinkling water so that their vitality does not decrease.

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  Drooping 2: Skillfully, one after another, the cultivation cages are drooped into the aquaculture facility.

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  Drooping 3: It is a growing cage that is drooping.

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Main distribution

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  Removal of juvenile clams: Temporarily housed juvenile clams are removed to replace them with breeding cages with larger meshes and to reduce housing density.

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  Sorting: Removed juvenile clams are sorted by a sorting machine.

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  Containment 1: Selected juvenile clams are recontained in large-mesh nursery cages.

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  Containment 2: Work quickly to avoid weakening the spat.

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  Drooping: The contained cages are suspended in the harbor for several hours before being transported offshore. It is then loaded onto a ship and transported to the farm.

• Next

shipping

Dispersed scallop spats are housed in cages and suspended in offshore aquaculture facilities. From now on, I will be careful about the growth and survival of the scallops, and I will manage them diligently, such as installing adjustment balls.
The young scallops raised and managed in this way are shipped to the Fisheries Cooperative in the Sea of ​​Okhotsk and released from March to May of the following year.

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  Unloading 1: This is a breeding cage that has been brought ashore for shipping.

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  Landing 2: Young clams are removed from the nursery cages on board. In some areas, this work is done on land.

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  Landing 3: Young clams are landed using a belt conveyor.

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  Sorter: Juvenile clams are sorted by a sorter and only large shells are shipped.

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  Boxing: The fry are packed in fish boxes.

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  Weighing: packed in 20 kilograms.

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  Inspection: Juvenile clams are inspected, normal clams, abnormal clams, and dead clams are counted, and the number of clams that reach the shipping standard size is counted.

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  Shipment 1: Young clams packed in fish boxes are covered with wet matai (thick linen cloth) to keep them alive.

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  Shipment 2: Boxed juvenile clams are loaded onto refrigerated trucks and taken out.

• Next

Cooperation: Rumoi Promotion Bureau Jurisdiction / Mashike Fisheries Cooperative Mashike Scallop Farming Group
Shinsei Marine Fishery Cooperative Usutani
Scallop Farming Group