PROBLEM TO BE SOLVED: To solve actual conditions in which artificial culturing of a brown alga sargassum is hardly carried out because there are such problems that it is difficult to make immatures adhere or prevent feeding damage by animals feeding on algae etc., for the artificial culturing of the brown alga sargassum horneri though culturing of edible seaweeds has an old history and an extremely wide range scientific and practical tries are made for various seaweeds especially the quantity of production of Undaria pinnatifida, Laminaria japonica, and Porphyra tenera by the artificial culturing is extremely large and the artificial culturing is universally carried out.SOLUTION: Algal bodies of two kinds of the brown alga sargassum (scientific name: Sargassum horneri) having female and male matured reproductive organ receptacles are raised in a circulating water tank provided with stretched seed yarns. The algal bodies in such a state that released fertilized eggs germinate and the immatures thereof adhere to the seed yarns by rhizoids are made to pass the summer in the circulating water tank. The immatures are grown even into a visible state. The seed yarns are then taken out of the circulating water tank, and stretched in the sea at a prescribed depth to make the immatures grow up.COPYRIGHT: (C)2012,JPO&INPIT【課題】食用海藻類の養殖は歴史が古く、かつ極めて広範囲で、学術的や実用的にも種々の海藻が試みられている。 特に、ワカメ、コンブ、アサクサノリの人工養殖による生産量は極めて多く、普遍的に行われている。ところが、褐藻アカモクの人工養殖については、幼体を付着させたり、藻食動物の食害の防止が困難などの問題があり、殆ど行われていないのが実情である。【解決手段】 種糸を張り渡した循環水槽内で、雌と雄の成熟した生殖器床を有する2種類の褐藻アカモク(学名:Sargassum horneri)の藻体を育成し、放出された受精卵が発芽して、その幼体が仮根により前記種糸に付着した状態で、前記循環水槽内で越夏させ、前記幼体を目視可能にまで生育させた後、前記種糸を前記循環水槽より取り出して所定深さの海中に張り渡し、成長させる。【選択図】図1