Olfactory responses of coral-reef fishes to coral degradation and crown-of-thorns (Acanthaster planci)
Olfactory responses of coral-reef fishes to coral degradation and crown-of-thorns (Acanthaster planci)
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DOI：
10.1071/mf14424
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发表时间：
2016-01-01
影响因子：
1.8
通讯作者：
Jones, Geoffrey P.
中科院分区：
文献类型：
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作者：
Coppock, Amy G.;Gardiner, Naomi M.;Jones, Geoffrey P.
珊瑚退化是对珊瑚礁生态系统生物多样性的主要威胁，要么是由于环境变化的实际影响，要么是由于荆棘树冠(Acanthaster Planci)等生物因素。珊瑚的丧失正在导致珊瑚礁鱼类种群的显著减少，特别是那些依赖活珊瑚作为栖息地的珊瑚礁。大多数珊瑚鱼在栖息地使用嗅觉刺激；然而，它们从降解的珊瑚或A.planci中检测化学刺激的能力尚不清楚。在这里，测试了幼鱼对应激珊瑚和A.planci存在时的嗅觉反应。八种常见珊瑚相关物种的幼体接受了一系列配对选择测试，其中记录了在两个不同水源度过的时间。所有物种都表现出对健康珊瑚的显著吸引力(>；=76%)，避免受到压力的珊瑚群体发出的暗示。当被要求在对照水(未经处理的珊瑚礁水)和含有Planci化学线索的水之间进行选择时，大多数物种没有引起任何反应。最后，当让所有物种在取食普朗克原虫或对照的化学线索之间进行选择时，所有物种都避开普朗克原虫(>；=70%)。我们的结果表明，幼鱼能够区分珊瑚的健康状况，但不能直接从干扰物中区分出来。
Coral degradation is a major threat towards the biodiversity of coral-reef ecosystems, either through the physical effects of environmental change, or biological agents such as crown-of-thorns (Acanthaster planci). Coral loss is leading to significant declines in reef-fish assemblages, particularly those dependent on live coral as settlement sites. Most reef fishes use olfactory stimuli at settlement; however, their ability to detect chemical stimuli from degraded corals or A. planci is unknown. Here, olfactory responses of juvenile reef fishes to the presence of stressed corals and A. planci were tested. Juveniles of eight common coral-associated species were subjected to a series of pair-wise choice tests, where the period of time spent in two differing water sources was noted. All species demonstrated a significant attraction towards healthy coral (>= 76%), avoiding cues emitted by stressed coral colonies. When given the choice between a control water (untreated reef water) and water containing chemical cues from A. planci, most species elicited no response. Finally, when given the choice between chemical cues derived from feeding A. planci or the control, all species avoided A. planci (>= 70%). Our results indicated that juvenile reef fish are capable of distinguishing the state of coral health, but not directly from disturbance agents.