Oyster Mesh ,Oyster Mesh Bag,HDPE Oyster Mesh

Specifications

 Oblong HDPE Float Bag   ,Oyster bag
Float bags are an easy and inexpensive way to start growing some oysters of your own. Simply empty some seed oysters into a float bag and tie it off to your dock. Give the bag a shake and a flip every few weeks and watch your oysters grow! Floats, zip ties and mesh bags are all UV-resistant for durability. Float bags can be shipped UPS and make a perfect gift for the waterfront homeowner who has everything! Our customers typically give the float bag as a gift, along with a gift certificate for oyster seed which the recipient can get from us whenever they are ready.

Spec we can do: Mesh size: 4mm, 6mm,9mm,12mm,14mm,16mm,20mm,23mm. Width: 0.3m-0.7m Length: 50 cm-25 m.

1^st:There are four main types of oyster farming:

1. Traditional Bed or Bottom Culture

Oysters are grown on the grounds of intertidal regions(the area that is above water at low tide and under water at high tide), feeding on the plankton available in the incoming tide. These areas are usually gravel or hard packed sand beaches.

2. Rack and Bag Culture

Oysters are cultivated in plastic net bags. supported above the ground on steel racks so that water can flow completely around the oysters allowing them to feed faster and be protected from crabs and other predators. This method also makes it possible to grow oysters in areas which might otherwise be too muddy to grow them directly on the intertidal grounds.

3. Suspended Culture

This method may vary between suspended tray culture or lantern net culture. The purpose of this method is to allow for growing oysters in deeper, sub tidal waters. The oysters are placed in trays or nets which are suspended from floats or sub-tidal longlines so that they hang below the surface of the water 24 hours per day allowing for the oysters to grow very fast.

4. Intertidal Longline Culture

Another suspension method where adult oyster shells with baby oysters set on them, are then inserted into the strands of a rope. The shells are spaced out every foot or two along a 300-600 foot rope, and that rope is then stretched along the ground in the intertidal region at low tide, and the rope is then supported about a foot above the ground with pegs. The end result is that the entire length of rope and shell is suspended above the natural bed allowing for the oysters to grow faster than they would settled down into the mud or sand.

2^nd: Why do we grow our oysters on the surface of water?

Feeding by float mesh bag.

Oysters stay cleaner and do not contain "grit"

Due to ample light penetration, there is a high availability of micro-algal food for optimal oyster growth

Wave action insures oxygenation of surface water

Disease processes (Dermo & MSX) are absent

Low observed mortality rate of 4%

Growth to minimum market size (3”) in 18-24 months.

Feeding not by float mesh bag.

Oysters are less aesthetically appealing and contain "grit"

Silt at the bottom increases food handling times making it more difficult for oysters to feed

Low levels of sunlight at the bottom, restricts the amount of micro-algal food available

Disease processes are resident

High mortality rates of >75%

Growth to market size: 3 years minimum, if they survive.

Typical Layout of the floating bag

Long line floating bags are an extremely cost efficient aquaculture production system. Compare costs per hectare & per dozen of production with alternative systems.
Approximate cost

Floating bag:

Baoheng Oyster Bags: foam float, closing hook, 2 x 80mm shark clips , 168 bags x 20 rows =

25200USD.

Rope:

Baoheng Rope-2: 8mm marine grade rope 115m x 20 rows = 2,300m @ $0.20 / m = $460

Posts:

Approx price on 2m x 90mm plastic post or timber flumed in plastic 4 posts x 20 rows = 80x $5 (estimate only) = $400