文章摘要
三亚鹿回头礁区造礁石珊瑚的摄食特征研究
Heterotrophic feeding of hermatypic corals in Luhuitou Sanya
投稿时间:2020-09-11  修订日期:2020-10-22
DOI:
中文关键词: 造礁石珊瑚  摄食  食性  摄食速率  消化;三亚
英文关键词: hermatypic corals  feeding  feeding habits  feeding rate  digestion  Sanya
基金项目:国家重点研发计划项目(2017YFC0506301);国家自然科学基金(41976120, 41906097);广东省科技计划项目(2017B0303014052);中国科学院科技服务网络计划(KFJ-STS-ZDTP-055)
作者单位邮编
甘健锋 中国科学院南海海洋研究所 510301
俞晓磊 中国科学院南海海洋研究所 
罗勇 中国科学院南海海洋研究所 
黄林韬 中国科学院南海海洋研究所 
刘骋跃 中国科学院南海海洋研究所 
江雷 中国科学院南海海洋研究所 
黄晖 中国科学院南海海洋研究所 510301
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中文摘要:
      能量与营养物质的正常获取是维系造礁石珊瑚生命活动的基础,这主要与其两种营养方式——光合自养和异养营养有关。当前,国内外学者对造礁石珊瑚的研究以光合自养为主,而对其异养营养的认识则相对不足。基于此,本文以鹿回头礁区(三亚市,海南省)的三种代表性造礁石珊瑚——丛生盔形珊瑚、鹿角杯形珊瑚和美丽鹿角珊瑚为研究对象,通过投喂丰年虫无节幼体、水族用桡足类、酵母浸出粉溶液及水族珊瑚粮等四种食物,探讨了三种造礁石珊瑚的食性、摄食方式。结果显示丛生盔形珊瑚对上述四种食物均表现出明显的摄食行为;相反,美丽鹿角珊瑚对四种食物均不表现摄食行为;鹿角杯形珊瑚只摄食尺寸较小的丰年虫无节幼体和水族珊瑚粮,并首次发现其在摄食丰年虫无节幼体时水螅体间相互协作以及通过释放肠系膜摄食水族珊瑚粮的现象。进一步研究丛生盔形珊瑚对丰年虫无节幼体的摄食速率和消化情况,发现其摄食速率与丰年虫无节幼体密度符合米氏方程,且其消化周期约为3小时。研究结果有助于更加深入地认识造礁石珊瑚摄食取向及其摄食过程,可为造礁石珊瑚人工养殖过程中的饵料选择提供借鉴。
英文摘要:
      The acquisition of energy and nutrients is the basis of sustaining the life activities of hermatypic corals, which is mainly depended on the alimentation mode. Hermatypic corals are mixotrophic organisms, both autotrophic and heterotrophic. It is acquainted that photosynthesis by zooxanthellae is the basic form of autotrophy, but little is known about the heterotrophic feeding. To know more about it, three representative species in the Sanya Luhuitou Bay, which are Galaxea fascicularis, Pocillopora damicornis and Acropora muricata are selected in this study to test their feeding habits. Their feeding reaction to Artemia salina nauplii, copepod used in aquarium, yeast extract liquor and aquatic coral food are observed. What’s more, Galaxea fascicularis’s feeding rate and digestion of Artemia salina nauplii are probed into. It’s observed that Galaxea fascicularis ingests four kinds of food mentioned above, while Acropora muricata ingests none of them and Pocillopora damicornis only ingests Artemia salina nauplii and aquatic coral food. It’s firstly reported that Pocillopora damicornis ingests Artemia salina nauplii by mesenterial filaments and it ingests aquatic coral food through the cooperation between polyps. Moreover, Galaxea fascicularis’s feeding rate of Artemia salina nauplii and the density of Artemia salina nauplii were well fitted into Michaelis-Menten model(R2 =0.9978). Artemia salina nauplii is completely digested by the Galaxea fascicularis with 3h. The reasearh can deepen our knowledge about the feeding of hermatypic corals, especiallly in the process of artificial coral breeding.
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