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水產研究(1993年創刊)

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  • 點閱: 882
  • 日期: 2019-07-17
水產研究(1993年創刊)-臺灣綠島沿岸硨磲貝的分布密度特徵
主題: 臺灣綠島沿岸硨磲貝的分布密度特徵
摘要(中):
硨磲貝是體型最大的雙殼貝,是海域中珊瑚礁生態系的健康指標性生物之一。為了評估綠島沿岸硨磲貝的分布密度與分析保護區對硨磲貝的保護效力,本研究於2015至2016年間利用穿越線調查法,以水肺潛水方式於綠島沿岸24個測站調查硨磲貝的分布密度特徵。結果顯示,2016年硨磲貝的平均密度為1.5顆/100 m2,較2015年之2.5顆/100 m2,減少甚多。主要種類為長硨磲貝 (Tridacna maxima) 約佔70%以上;其次為諾亞硨磲貝 (Tridacna noae) 約佔20%。石朗保護區的密度高且是殼長15 cm以上的種貝熱區,顯示對硨磲貝具有保護效力;但龜灣保護區的密度則較低,推測其保護效力尚未發揮作用,因此更應落實保育宣導。本調查結果將有助於保育綠島之硨磲貝資源,作為往後長期監測海洋棲地環境與評估珊瑚礁健康情形之參考資料。
出版日期: 2018/6/30
標題title(英): The Distribution and Density of Giant Clams (Tridacna spp.) Around Green Island, Taiwan
作者: 楊清閔‧陳高松‧陳岳川‧黃星翰‧黃建智‧吳龍靜
卷別: 26
期別: 1
頁碼: 43-51
作者 auther(英): Ching-Min Yang, Kao-Sung Chen, Yuen-Chuan Chen, Hsing-Han Huang, Jian-Zhi Huang and Long-Jing Wu
摘要abstract(英): The giant clam (Tridacnidae) is the largest bivalve in the world and used to be one of the health index species of a coral reef ecosystem in sea areas. In order to evaluate the distribution and density of giant clams around Green Island, Taiwan, and to analyze the protective effect of conservation areas on giant clams, a transect belt survey method was implemented in 2015 and 2016. Twenty-four stations around Green Island conducted underwater surveys in order to obtain the basic distribution and density of giant clams around Green Island. The results showed that the average density of giant clams was 1.5 clams/100m2 in 2016, which was lower than the 2.5 clams/100m2 density reported for 2015. The dominant species was Tridacna maxima, which accounted for over 70% of the clams observed, followed by Tridacna noae at about 20%. The Shilang Conservation Area has a high density of and is a hot zone for sexually mature shellfishes with shells longer than 15 cm. The Shilang Conservation Area is effective at protecting giant clams, but the Guiwan Conservation area was found to have a low density of giant clams. Thus, its protective effect is insufficient, and so additional advocacy for conservation shall be implemented. The findings of this study will help conserve local giant clam resources and can be used as reference data for long-term monitoring of marine habitats and the health of coral reefs in the future for the sustainable utilization of ocean resources.
使用語言: 中文
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