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Laminaria digitata. Laminaria digitata is a tough, leathery, dark brown seaweed that grows to 2 or 3 metres (6 + 1 ⁄ 2 or 10 ft) long. The holdfast which anchors it to the rock is conical and has a number of spreading root-like protrusions called rhizoids.
Laminaria was harvested for food and 1949 yielded 40.3 metric tons of dry weight. [9] Laminaria need cold water to survive and can only live above 36° N latitude. [citation needed] In 1949, the Chinese started to commercially grow laminaria as a crop. This increased the production of dry weight to 6,200 metric tons.
Used by coastal indigenous peoples to create fishing nets. Giant kelp, Macrocystis pyrifera, the largest seaweed. Found in the Pacific coast of North America and South America. Kombu, Saccharina japonica (formerly Laminaria japonica) and others, several edible species of kelp found in Japan. Species of Laminaria in the British Isles;
A Scoubidou is a corkscrew-like tool that is used for the commercial harvesting of seaweed, whose invention is credited to Yves Colin in 1961. [1] The device consists of an iron hook attached to a hydraulic arm. [2] It superseded a common harvesting tool known as the guillotine shortly after its invention. [3]
The seaweed was also used as fertilizer for crop land in the same areas in which it was harvested. [8] [Note 1] Fucus species can also be used for thalassotherapy, along with other species such as Turkish towel (Chondracanthus exasperatus), feather boa (Egregia menziesii), and finger kelp (Laminaria digitata). [9]
A laminaria stick or tent is a thin rod made of the stems of dried Laminaria, a genus of kelp. Laminaria sticks can be generated from Laminaria japonica [ 2 ] and Laminaria digitata . [ 3 ] Second generation dilators such as Dilapan-S are composed of polyacrylonitrile , a plastic polymer. [ 4 ]
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Laminaria hyperborea is a species of large brown alga, a kelp in the family Laminariaceae, also known by the common names of tangle and cuvie. It is found in the sublittoral zone of the northern Atlantic Ocean. A variety, Laminaria hyperborea f. cucullata (P.Svensden & J.M.Kain, 1971) is known from more wave sheltered areas in Scandinavia. [2]