鋸齒麒麟菜之世代判別與資源保護策略

Generation determination and resource protection methods of Eucheuma perplexum Doty

鋸齒麒麟菜Eucheuma perplexum 為台灣本土料理涼拌蜈蚣菜的主要原料，因擁有充滿嚼勁的口感，深得大眾所愛。本研究使用核磁共振光譜法進行鋸齒麒麟菜之世代判定並於新北市瑞芳區深澳漁港海域實施兩項資源保護實驗。世代判定結果顯示，鋸齒麒麟菜配偶體及四分胞子體之藻體內鹿角菜膠皆為ι 型，故需使用其他方式判定未成熟藻體之世代。而資源保護實驗結果顯示，單去除鋸齒麒麟菜群落周遭的競爭物種無法提升鋸齒麒麟菜之族群量，但於鋸齒麒麟菜生長高峰或攝食壓力高之時期予以保護，如設置保護籠等，可維持其正向的日成長量。本研究以累積鋸齒麒麟菜之生物學資訊及增加資源保護策略建議為目的，未來建議可投入資源以建立如鋸齒麒麟菜等高經濟藻種之養殖系統，並開發可迴避草食性生物之方法，以作為未來大型藻類養殖技術之基盤。

Eucheuma perplexum Doty is the main ingredient of a Taiwanese local dish “Liang Ban Wu Gong Cai” (cold centipede dish), and is loved by the locals for its chewy texture. In this research, the generation of E. perplexum is determined by using Nuclear Magnetic Resonance (NMR) spectroscopy. Two resource protection experiments were conducted in Shen-Ao Bay, Rui-Fang District, New Taipei City. The results from sex determination showed that both generations contain the same carrageenan, which is the iota type. It is necessary to use other methods to determine the sex of immature E. perplexum. The results of two protection experiments showed that although the removal of competing species around the communities of E. perplexum does not increase the population of E. perplexum, protecting them, e.g., in a cage during the high growth or high feeding pressure period can positively maintain their daily growth rate. The purpose of this research is to accumulate the biological information of E. perplexum and to find new strategies in resource conservation. It is recommended in the future to invest in exploring the establishment of a cultivation system for high-economic algae such as E. perplexum, and to develop methods to avoid herbivories, laying the foundation of the future seaweed cultivation technology.