| Production systems | Long-lines, rafts, bottom culture, net bags, cages, trays, lantern nets, bouchot poles and other containment systems. For mussel cultivation on rafts the number of drop-ropes must not exceed one per square meter of surface area. The maximum drop-rope length must not exceed 20 metres. Thinning-out of drop-ropes must not take place during theproduction cycle, however drop ropes may be subdivided without increasing the stocking density. |