Cryptic life stages in scyphozoan jellyfish: Larval settlement preferences of the South American sea nettle Chrysaora plocamia
Cryptic life stages in scyphozoan jellyfish: Larval settlement preferences of the South American sea nettle Chrysaora plocamia
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DOI：
10.1016/j.jembe.2017.02.007
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发表时间：
2017-05-01
影响因子：
2
通讯作者：
Riascos, Jose M.
中科院分区：
文献类型：
--
作者：
Ceh, Janja;Riascos, Jose M.
在过去的几年里，形成水华的水母受到了相当大的关注。虽然引人注目的水母已经得到了很好的研究，但人们对它的小而不显眼，很难找到的珊瑚虫却知之甚少。事实上，很难发现大多数钵水母物种的息肉在它们的自然栖息地中没有被发现。考虑到珊瑚虫在水母水华形成中可能发挥的重要作用，确定浮浪的标准以选择合适的微生境，保证珊瑚虫的健康和生存是一个关键问题。为了揭示多角金蜥的自然栖息地特征，在实验室条件下研究了浮浪虫的定居偏好。的解决密度，趋地性和颜色偏好进行了评估，使用三维基板，提供不同的方向，水平的住房和颜色的解决方案领域。Planulae专门殖民水平表面在一个颠倒的位置，往往会解决在庇护区，并表现出显着的偏好绿色和红色基板。如果水母C. plocamia在该领域显示出类似的偏好，珊瑚虫应该在提供悬垂物、小洞穴、裂缝或屋顶表面的受保护基质上，以及绿色或红色基质上，如大型藻类或甲壳珊瑚藻类的柄和叶片上发现。(C)2017 Elsevier B.V.版权所有。
Bloom forming jellyfish have received considerable attention over the past years. And while the eye-catching medusa is well studied, little is known about its small, inconspicuous and hard to find polyp-counterpart. In fact so hard to find that polyps of most scyphozoan species have not been detected in their natural habitat. Considering the important roles polyps may play in jellyfish bloom formation, identifying the criteria for planulae to select suitable microhabitats that warrant the well-being and survival of polyps is a key issue. In order to find clues on the characteristics of natural habitats of Chrysaora plocamia polyps, settlement preferences of planulae were determined in a laboratory study. The settlement density, geotaxis and colour preferences were assessed, using a three-dimensional substrate that provided settlement areas of different orientation, levels of shelter and colours. Planulae exclusively colonized horizontal surfaces in an upside down position, tended to settle in sheltered areas and showed significant preferences for green and red substrates. If planulae of the jellyfish C. plocamia display similar preferences in the field, polyps should be found on protected substrates that provide overhangs, small caves, crevices or roof-surfaces, and green or red substrates, like stipes and blades of macroalgae, or crustose coralline algae. (C) 2017 Elsevier B.V. All rights reserved.