Description
The purse-seine net is a type of seine net, which is used to encircle fish in the water. It is particularly effective at targeting schooling fish such as tuna, mackerel, salmon, anchovy, sardine.
Purse seines are mainly used for distant sea fishing and successful fishing can catch tens to hundreds of tonnes at a time.
How it works
- Spotting the location of the target schooling fish.
- A speed boat will pull the seine net and form a circle around the target fish.
- The speed boat will collect the both ends of nets together and pull alongside the larger boat.
- A heavy-duty hydraulic winch on the large boat will pull the purse line to make the bottom of nets closed.
- The seine net will be closed and lifted to the boat.
Main Parts of Purse seine
The netting is typically made of nylon or polyester that are strong, durable, and able to withstand the rigors of fishing. It has a specific mesh size and shape that allows it to effectively capture the targeted species while minimizing bycatch.
Buoyant floats are attached to the top of the netting to keep it afloat on the surface of the water. The floats are usually made of PVC or EVA and are strategically placed to ensure that the netting remains open and spread out.
A weighted line is attached to the bottom of the netting to keep it submerged in the water. The leadline is typically made of lead or other heavy materials and helps to create a “purse” or pocket in the net when it is drawn
Layout of the nets
The nets of purse seine are sewed by pieces of nets in different twine and mesh size. If you have the layout, you could talk with our Engineers directly.
Production of purse seine
Purse seine is a completed fishing net, the production is a little different from the fishing net by piece. we need install the floats and lead in our factory.
Net weaving
The nets will be woven in our weaving workshop, the process is same as the fishing net by piece.
installation
The nets will be sewed together with the ropes, leads and floats. everything will be made by hand.
packing
the purse seine will be packed which should be convenient for shipping.
How to choose the nets
Choosing the right nets for a purse seine depends on several factors, including the size and type of fish you are targeting, the depth of the water, and the conditions of the environment in which you are fishing.
Material
- Nylon - Most of fishermen choose the nylon to make the purse seine. Because nylon has better water absorption, it makes that the nylon has faster sinking speed in fishing. It can help fishermen catch more fishes.
- Polyester - Other fishermen choose polyester to make the purse seine. Because it has similar strength as nylon, but it is much cheaper than nylon. To increase the sinking speed, they usually add more sinkers.
Types of nets
- Knotless net - Nearly all the purse seine net is produced by knotless net. Because the surface of knotless net is smooth, it can reduce the damage to the fish from the net in fishing.
- Multifilament net - Some fishermen choose the nylon or polyester multifilament net. This kind of purse seine net is not very large, and it is usually handled by hand.
size of purse seine
- Power of Vessel - The size of purse seine depends on the power of vessel. The power should be big enough to handle the total weight of purse seine and fishes inside.
- Location of fishing - If the purse seine is used in the sea, the size could be large. if it is used in the river, the depth should be less than the depth of water.
- Fishing capacity - The size of purse seine should consider the target weight of fishes you want to catch each time. The normal capacity would be 20 - 100 tons or more.
Twine of nets
- Strength - There will be tens of hundreds of tons fishes in the purse seine each time. You should ensure that the strength of nets could withstand the total weight of nets and fishes.
- Fishing capacity - The fishing capacity is larger, the twine would be thicker.
- Durable - The thick twine could make the nets more durable, it also could reduce the risk of breaking or tearing in fishing.
- Cost - The fishing capacity is larger, the weight of nets would be heavier, the cost of nets will be higher, Meanwhile, the fuel consumption will also be higher.
Mesh size of nets
- Target fish - The mesh size depends on the size of the fish you are targeting. Smaller fish require smaller mesh sizes to prevent them from escaping, while larger fish can be caught with larger mesh sizes.
- Bycatch - If the area has a high bycatch rate of non-target species or endangered species, a bigger mesh size may be required to reduce bycatch.
- Policy - Make sure to review the policy in the area where you will be fishing to ensure compliance.
Color of nets
- Water Visibility - If the water is clear, choosing a net color that blends with the surroundings or is less noticeable to the fish can be beneficial, such as light blue, green, or clear.
- Light Conditions - If you frequently fish during bright daylight hours, a net with lighter colors might be suitable. Conversely, during low-light conditions or night fishing, darker-colored nets might be less visible and potentially more effective.
- Target species - Different fish have different color vision capabilities and may be more attracted to or deterred by certain colors.
- Peference - The different color might have different meaning in the local market, the fishermen choose the diffrent quality based on the different colors.
How to choose the floats and Leads
The suitable floats and leads is very important to purse seine. the floats could keep the purse seine floating on the surface. and the leads could increase the sinking speed.
PVC & EVA Floats
- Buoyancy - EVA floats are generally more buoyant than PVC floats in same size.
- Durability - PVC floats are more durable than EVA floats.
- Comfort - EVA floats are softer and more cushioned. PVC floats are often harder and less forgiving.
- Cost - PVC is cheaper than EVA.
Leads
- Size of the nets - The weight of the leads should be proportional to the size of the net. Larger nets require heavier leads to keep them submerged and prevent fish from escaping underneath.
- Target species - If the fish tend to stay near the surface, lighter leads may be used. If the fish are deeper in the water column, heavier leads may be necessary.
- Material - it could be lead, iron, or concrete. you could consider the cost, availability, and environmental concerns. Heavier weight of leads could increase the sinking speed, it also could increase the fuel consumption of the vessel.
How to buy a purse seine
you have 2 options: buy a completed purse seine from the supplier. the other option is buy the fishing net by piece and make the purse seine in your country by yourself.
Proposal discuss
If you have the drawings of purse seine, you could talk with the details with your supplier. if you just want to buy the fishing net, you could show them the specifications and quantity.
Quotation
When all the details is confirm, you can get the quotation from your suppliers. And you would compare the prices between the suppliers.
Samples check
To check the quality, you could ask the suppliers for the free samples to check their quality. You also could check the photos and videos of their production.
Order comfirm
After comparing the price and quality, you would have a discuss with your management, and decide to choose the best supplier.
Production
The supplier will start to produce the purse seine as your requirement. You could ask the photos and videos of the production several weeks later.
shipping
All the goods will be loaded into the container when it is prepared. As usual, the supplier will share the photos or videos of loading with you.
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