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首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >Host selection and preferences of coral symbiotic crab Tetralia rubridactyla
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Host selection and preferences of coral symbiotic crab Tetralia rubridactyla

机译：珊瑚共生蟹Tetralia rubridactyla的寄主选择和偏好

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Coral symbiotic crabs provide considerable benefits to their host corals. A comprehensive understanding of the association between these crabs and their hosts could help clarify the relationship, interaction, and importance of symbionts with coral reefs as hosts. In this study, the coral symbiotic crab Tetralia rubridactyla was test for host preference and fidelity. Five oceanic objects were provided to the crabs: common host corals (Acropora hyacinthus and A. digitifera), uncommon host corals (Pocillopora damicornis and Stylophora pistillata), and dead coral skeletons. The crabs were collected from the 2 source host corals A. hyacinthus and A. digitifera and subjected to an experiment comprising 7 treatments. Each treatment included 2 stages of no-choice and choice conditions to estimate the expected selection frequencies. The results revealed that the crabs chose any available object under the no-choice condition, and exhibited various preferences under the choice condition. Moreover, T. rubridactyla exhibited significantly higher frequencies to inhabit Acropora corals (p < 0.01, chi(2) test), than dead coral skeletons and uncommon host corals. In all the treatments, the preferences of the crabs from the 2 source hosts were similar. Present results demonstrated T. rubridactyla host selection conditioning as follows: (1) Under the no-choice condition, inhabit any choice object for shelter; (2) under the choice condition, if without a common host, randomly inhabit any uncommon choice object as a host; and (3) under the choice condition, if a common host is available, selecting the common host is the first priority because it could provide food and space. This study revealed that T. rubridactyla express neither fidelity nor preference between A. hyacinthus and A. digitifera. Thus, these results also suggested that the distribution of T. rubridactyla on Acropora corals in the reef is affected by an abundance of corals rather than the preferences of coral species. (C) 2016 Elsevier B.V. All rights reserved.
机译：珊瑚共生螃蟹为其寄主珊瑚提供了可观的利益。全面了解这些螃蟹与其寄主之间的联系可能有助于阐明以珊瑚礁为寄主的共生体之间的关系，相互作用和重要性。在这项研究中，测试了珊瑚共生螃蟹Tetralia rubridactyla的寄主偏好和保真度。向螃蟹提供了五个海洋物体：常见的寄主珊瑚（Acropora hyacinthus和A. digitifera），不常见的寄主珊瑚（Pocillopora damicornis和Stylophora pistillata）以及死去的珊瑚骨架。螃蟹是从2种来源的寄主珊瑚A. hyacinthus和A. digitifera收集的，并进行了包含7种处理的实验。每个处理都包括两个阶段的无选择和选择条件，以估计预期的选择频率。结果表明，螃蟹在无选择条件下选择了任何可利用的物体，并在选择条件下表现出各种偏好。此外，与死珊瑚骨骼和不常见的寄主珊瑚相比，丁香丁香显示出更高的栖息于Acropora珊瑚的频率（p <0.01，chi（2）测试）。在所有处理中，来自两个来源宿主的螃蟹的偏好是相似的。目前的结果表明，红毛苔藓寄主选择条件如下：（1）在无选择条件下，居住任何选择对象作为庇护所； （2）在选择条件下，如果没有共同的宿主，则随机居住任何不常见的选择对象作为宿主； （3）在选择条件下，如果有共同的宿主，选择共同的宿主是第一要务，因为它可以提供食物和空间。这项研究表明，风信子藻既不表现信度，也不表达风信子和指指线虫之间的偏爱。因此，这些结果还表明，在珊瑚礁中的棘足珊瑚上的红毛锥线虫的分​​布受珊瑚数量的影响，而不是珊瑚种类的偏好。 （C）2016 Elsevier B.V.保留所有权利。

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