In past articles we have discussed alternative products that FISA produces for the aquaculture industry and how each product can better adapt to different customer’s needs depending on the species of fish farmed, the oceanographic conditions, potential predator risks and never to forget the working conditions and maintenance system each specific farm utilises for its cages.
We have already discussed the various ropes that can be used for the structure of the cages and mentioned such options as Polysteel, PE, PP, Nylon, Polyester and FISA’s trademark products such as Polymax® and Polytar® ropes.
Additionally, we have discussed the various raw materials that can be used for netting. We mentioned some advantages and disadvantages of nylon netting versus polyester netting, the lightweight advantages of UHMWPE and some potential disadvantages of that product and we finished off mentioning FISA’s Supra® Advanced Fibers which is a third generation HDPE netting.
In the following paragraphs we will outline some basic characteristics of the knotted netting, braided netting, raschel netting and Shogun® netting, otherwise known as twisted knotless Muketsu netting.
Raschel “knotless” netting is probably the most common type of netting used in aquaculture. This knotless netting is a low cost knitting manufactured on Raschel-type machines, thus the origin of the name, and is characterised by the relatively fast production process. Raschel netting is normally manufactured using nylon, polyester, polyethylene or multifilament PP.
A big advantage of Raschel netting is the fact that the nature of the knitting leads to lineal ruptures thus making it much easier to repair. Also, some farmers claim that knotted (twisted or braided) netting can damage the fish skin when it rubs with the knots. We are not sure how to dimension this potential risk in knotted netting, but it must be mentioned.
Read more, HERE.
The Aquaculturists
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