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Oyster netting bags- A flexible and durable way to raise oysters

Dec. 07, 2021

Floating Oyster Bags

Oyster netting bags are pre-cut oyster tube nets. It's a flexible way to raise your oysters, whether floating on the surface or underwater.

All oyster bags are made of heavy duty HDPE oyster netting. TAONI oyster bags can be assembled with stainless steel clips, elastic bands and nylon ties. taoni oyster bags can be used in the water for over seven years. We can provide you with various sizes of oyster net bags or we can make cages according to your specifications.

Material: 100% new UV resistant HDPE

Standard width: 30cm 45cm,50cm,60cm

Standard length: 70cm and 100cm

Mesh size: 2mm, 3mm, 4mm, 6mm, 9mm, 10mm, 12mm, 14mm, 16mm, 18mm, 22mm.

Weight/PC : 360g -900g/PC

End treatment: open or closed at both ends with pig ring or heat seal treatment

Mesh type: diamond and square

Color: Black is the main color because black mesh has longer life

Use: mainly used in aquaculture, especially for oysters, with no pollution, corrosion resistance, etc.

 

TAONI floating oyster bag

 

Here are some warm tips.

In the water, shake each oyster cage up and down to remove silt and dirt.

Move the cages to the dock for at least one hour each month to allow the sun and wind to dry and kill bacteria.

Pick out the dead oysters as soon as possible.

Shake each cage well to make sure the oysters are scattered on the bottom before putting the cage back in the water.

Don't forget to move the cages into the water.

A lot of labor can be saved if the bags are assembled with floats, such as shark bags.

 

Raising oysters in TAONI floating oyster bags or floating oyster cages is by far the best solution for obtaining quality oysters. By floating on the surface, oysters have access to more nutrients and oxygen in the water, so oysters grow faster and better than in the traditional way. It also keeps the oyster's shell clean compared to oysters that feed underwater.

Most oysters grown in floating bags have nice and uniform shells.

It reduces the cost of oyster feeding and benefits the environment.

There are two main types of floating oyster bags: oyster bags with rigid projectile-like floats and oyster bags with foam floats. They are popular in North America and Australia, respectively.

 

Optimal bag density for giant oyster seeds

A question we are often asked is what is the optimum bag density for growing giant oyster seeds. This is a difficult question to answer directly because of the wide variation among growing sites, but some general principles can be applied.

When seeds first arrive from the hatchery, you can place them initially in bags at a density of up to 5,000 units. It is important to put them back in the water as soon as possible, but you can keep them in this state for up to 10 days so that you have time to redistribute them. When you first get the seeds, it is best not to put them too high up on the bank so they can get plenty of water coverage.

If you are short of bags, you may consider a maximum first stage growth density of 4000/p bag. You may notice that growth seems to be faster at 4000: this is because the oysters have less room to roll under tidal action, so the frill (new growth) is not knocked off.

At lower seed densities, you should see a difference in the quality of the seed shape as the frill is broken off more frequently, resulting in round oysters with deeper cups. The big advantage of this is that you will end up with a stronger oyster that should be more resistant. This nice roundness should continue into the adult oyster as long as good feeding management is maintained throughout the growth cycle.

In France, oyster seeds are denoted by T for "tail" or "size" (e.g. T6, T8, etc.). In English, we use G for grade and a number for the size of the oyster seed in millimeters.

 

Taoni oyster bags in Australia

 

Notes on bagging oyster seed

Once the oysters are large enough to fit on a larger mesh, you can reduce them to 4 to 600 per bag and 150 oysters per bag (some as low as 120 per bag) during the final growth stage. If your site is nutrient-rich, 120 oysters per bag is the recommended density for maximum meat content.

Some considerations to remember when bagging seed.

We recommend that you try planting seed at different heights on the shore: the further down you go, the faster you will get growth; mid-tide and higher water levels on the shore will produce stronger oysters.

Higher densities pose a potential risk if you have disease or red tide coming into the bay: the higher the density, the faster mortality spreads through the bag (not always, but in most cases).

If you are willing to compare the results of different densities, we recommend 1000 / 2500 and 4000 per bag to see which is best for your site and your unique growing conditions.

If you are experimenting with different levels of seed density, do not place all low density bags at the end of the holder. Try alternating between the end of the holder and the middle for comparison, as the growing oysters at the end of the holder have higher access to nutrients.

Lower densities mean more bags to turn and more work to do! Turning is an important step to avoid setting seeds in the grid.

Make sure you use the correct size grid for the seeds so they don't slip through the grid. For example, if you have less of them in the bag, they will roll more, and it may happen that by removing the frill, the G10 can "shrink" to a G9, so it is important to keep the mesh size you use.

 

It is important to remember that these are only general rules and each grower must find the method that works best for their site. For example, some growers choose to move their seeds from 4 mm to 6 mm and then transfer them to 9 mm bags, while others skip the intermediate steps altogether. Available equipment, manpower and site conditions will all play a role in these decisions.

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