2025-08-22 00:28:42

調查(研究)計畫成果

本計畫延續水試所歷年海保署計畫成果，專注於澎湖海域硨磲貝的養殖與復育工作，並完成硨磲貝復育放流評估與標準程序(SOP)的建立。本研究依四階段長時間進行，包括穩定種原、放流評估、野外移植與長期監測，為期至少三年以上。本計畫研究期間，共計培育硨磲貝15990隻，包含鱗硨磲、長硨磲及諾亞硨磲三種品系。112年8月，於澎湖香爐嶼及鎖港杭灣兩處海域進行硨磲貝放流試驗，野外移植100隻鱗硨磲，並完成20次返回觀察。113年5月則於香爐嶼、鎖港杭灣以及山水港東三處海域移植150隻，包括鱗硨磲、長硨磲及諾亞硨磲，完成19次返回觀察。結果顯示，移植後89天後幼貝與亞成貝平均存活率以山水海域最高，幼貝平均存活率為55%，亞成貝則達90%，顯示山水海域最適合野外移植。同時，整體移植結果顯示亞成貝存活率平均約為70%，幼貝僅為30%，建議未來以尺寸5公分以上的亞成貝為最適放流體型(長硨磲與諾亞硨磲約15 - 17月齡；鱗硨磲約14 - 15月齡)，以提升野外存活率。此外，本計畫完成《海中巨寶石－硨磲貝》及《開啟硨磲貝復育行動2.0－在地力量攜手合作護硨磲》兩部微電影，期望能在提升社會大眾對硨磲貝的認識與保育意識。本研究成果可為硨磲貝復育與經營管理提供參考，並將促進海洋生態保育工作的推進。

Abstract

This project builds on the outcomes of previous projects of Ocean Conservation Administration by the Fisheries Research Institute, focusing on the cultivation and restoration of giant clams (Tridacna spp.) in the Penghu. The project established a standard operating procedure (SOP) for restoration efforts of giant clams, carried out in four stages: genetic stabilization, release evaluation, field transplantation, and long-term monitoring, over a three-year period. A total of 15,990 clams, including T. squamosa, T. maxima, and T. noae, were cultivated during the study. In August 2023, trial releases were conducted at two sites, Sianglu Islet (SL) and Suogang Hangwan (HB), releasing 100 T. squamosa clams, followed by 20 post-release monitoring observations. In May 2024, 150 clams, including T. squamosa, T. maxima, and T. noae, were released at three sites (Sianglu Islet (SL), Suogang Hangwan (HB), and Sanshuei Port East (SS)), with 19 monitoring observations. Results indicated the highest 89-day survival rates for recruits (55%) and juveniles (90%) in Sanshuei (SS), highlighting its suitability for transplantation. Overall, the survival rates for juveniles averaged 70%, while recruits were 30%. It is recommended to prioritize juveniles larger than 5 cm as the optimal release size (T. maxima and T. noae at 15-17 months old; T. squamosa at 14-15 months old) to improve survival in the wild. Additionally, two educational short films: The Underwater Gemstones—Giant Clams and Reviving Giant Clam Restoration 2.0—Collaborative Conservation Efforts, were produced to raise public awareness of giant clams and promote ecological conservation. These findings provide valuable insights for future restoration and management strategies, contributing to advancing marine ecological conservation efforts.