Effects of coral bleaching on the feeding response of two species of coral-feeding fish
Effects of coral bleaching on the feeding response of two species of coral-feeding fish
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DOI：
10.1016/j.jembe.2009.02.016
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发表时间：
2009-05-15
影响因子：
2
通讯作者：
Jones, G. P.
中科院分区：
文献类型：
--
作者：
Cole, A. J.;Pratchett, M. S.;Jones, G. P.
珊瑚白化对珊瑚礁生态系统的威胁日益突出，而不仅仅是对珊瑚。而且对许多依赖珊瑚为食物和住所的生物也是如此。大量漂白造成的珊瑚损失对以珊瑚为食的鱼类产生了负面影响，但尚不清楚大多数食珊瑚鱼类的摄食行为如何改变对珊瑚漂白的反应。在本研究中，两种专性食珊瑚鱼类--单齿唇鱼(Labrichthys uniineatur，Labridae)和毛齿鱼(Chaetdon Baronessa，Chaetodontidae)的摄食反应被实验地诱导了珊瑚漂白。在实验漂白猎物珊瑚之前、期间和之后立即监测摄食率。在漂白过程中，单线罗非鱼显著增加了对受影响珊瑚的摄食量，但一旦珊瑚完全漂白，摄食量就会稳步下降。单线乳杆菌的摄食反应似乎与预期的由漂白菌落诱导的应激诱导的粘液产生平行。相比之下，虽然漂白后的菌落在处理后的5天内被消耗，但巴罗内萨更喜欢从健康的菌落中摄食。食珊瑚鱼类的摄食可以在决定珊瑚状况和珊瑚在应激诱导的漂白后的死亡率方面发挥重要作用。(C)2009爱思唯尔B.V.保留所有权利。
Coral bleaching is an increasingly prominent threat to coral reef ecosystems, not only to corals. but also to the many organisms that rely on coral for food and shelter. Coral-feeding fishes are negatively affected by coral loss caused by extensive bleaching, but it is unknown how feeding behaviour of most corallivorous fishes changes in response to coral bleaching. In this study, coral bleaching was experimentally induced in situ to examine the feeding response of two obligate corallivorous fish, Labrichthys unilineaturs (Labridae) and Chaetodon baronessa (Chaetodontidae). Feeding rates were monitored before, during, and immediately after experimental bleaching of prey corals. L. unitineatus significantly increased its feeding on impacted corals during bleaching, but showed a steady decline in feeding once corals were fully bleached. Feeding response of L. unilineatus appears to parallel the expected stress-induced mucous production by bleaching colonies. In contrast, C. baronessa preferentially fed from healthy colonies over bleached colonies, although bleached colonies were consumed for five days following manipulation. Feeding by corallivorous fishes can play an important role in determining coral condition and mortality of corals following stress induced bleaching. (C) 2009 Elsevier B.V. All rights reserved.