農業部水產試驗所全球資訊網

利用馬尾藻組織的附著器、柄及葉狀體建立一種簡易再生葉狀體的方法，並嘗試找出適合之培養基。將馬尾藻附著器、柄和葉狀體以藻膠培養基培育，結果匍枝馬尾藻Sargassum polycystum 與中國半葉馬尾藻S. hemiphyllum var. chinense 之附著器再生率為100%。再取此二種藻之附著器，利用褐藻膠固定化包埋後，以四種不同成分之藻膠培養，也皆達100%。顯示馬尾藻之附著器適合作為人工種苗生產之極佳材料。 中國半葉馬尾藻可利用的種苗來源有由附著器再生而來的藻苗以及受精卵發育之種苗。天然藻體釋出精子與卵最初的6-8小時內是受精效率最好的時機。培養在30℃的成長率是比15、 20及25 ℃稍高。本研究發現中國半葉馬尾藻附繩養殖的確是可行的。 另外利用簡易浮漁礁體投放以及藻繩繫掛，的確在某種程度上可以吸引魚隻聚集，同時反映在CPUE的增加。

研究報告摘要(英) Simple methods were established for thallus regenerations from holdfasts, stipes and blades of brown alga Sargassum spp., and determination of suitable medium. The holdfasts, stipes and blades of Sargassum spp. were cultivated with agar media, and the result showed that regenerate rates of holdfasts of S. polycystum and S. hemiphyllum var. chinense could reach 100%. Furthermore, the above two species were cultivated with four different media: agar(086547)、purified agar (A 1296)、high gel strength agar(A9799) and carrageen (C1013) after being immobilized with algin. Regeneration rates of all combinations of treatments and samples also reached 100%. It suggested that holdfasts of Sargassum spp. could be excellent candidates for artificial seeds. Cultivation of brown alga Sargassum hemiphyllum var. chinense in Penghu in the sea depends on two sources of seedlings: holdfast-derived regenerated seedlings and zygote-derived seedlings. Under natural condition, receptacle formation of the plants began in February, and the eggs were released from March to May. The effective fertilization time of eggs by sperm was found to be within 6~8 hours. However, growth was slightly accelerated if cultured at a temperature of 30℃ compared to other culture temperatures of 15, 20 and 25 ℃. The findings of the present study suggest that the cultivation of S. hemiphyllum var. chinense on rope is practicable. Furture, the sustainable development of S. hemiphyllum var. chinense farming will rely on a stable supply of artificial seedlings via sexual reproduction under controlled conditions. Utilization of the combination of simplified fishing attracting device with macroalgae attaching threads can attract the aggregations of fishes and enhance the CPUE effectively.