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首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >The effect of epibiont ciliates on the behavior and mating success of the copepod Eurytemora affinis
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The effect of epibiont ciliates on the behavior and mating success of the copepod Eurytemora affinis

机译：表生纤毛虫对on足类Eurytemora affinis行为和交配成功的影响

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摘要

Epibiotic relationships in aquatic ecosystems usually involve planktonic micro-crustaceans (e.g. copepods) as hosts, and a variety of other microorganisms (e.g. bacteria, algae, ciliates) as epibionts. Several studies have reported the presence of epibionts on various species of calanoid copepods. However, the consequences of copepod behavior have not been extensively studied. Epibionts can impede reproduction and mating and increase predation pressure on copepods by limiting their swimming and escape capabilities. In late winter of 2009, we collected the copepod Eurytemora affinis from the Seine estuary and maintained them in the laboratory. We cultured copepods infested by the ciliate epibiont Zoothamnium sp. separately from uninfested copepods for one month under laboratory conditions. We then recorded the behavior of both the heavily infested and the clean copepods using 2D infrared video techniques, and analyzed the trajectories obtained using appropriate statistical methods. The trajectories revealed that the presence of large numbers of epibionts could negatively affect the behavior of the host, in terms of swimming activity (break, cruise, sink, and jump). Females were less affected than males. The high proportion of infestation also dramatically affected mating success. Mating was rare and practically nonexistent after one week in culture. This study indicates some of the difficulties that £ affinis could face during critical periods of its life span. In late winter, the population is mainly composed of old copepods, in low temperature water. Limited food resources and the presence of epibionts on their bodies eventually weaken the copepods, thus impairing their mating success and decreasing their survival rates.
机译：水生生态系统中的表观生物关系通常涉及浮游微甲壳纲动物（例如pe足类）作为宿主，而各种其他微生物（例如细菌，藻类，纤毛虫）则作为表观动物。几项研究报告了各种类的cal足类足足动物中存在表皮动物。但是，of足类行为的后果尚未得到广泛研究。幼虫可通过限制其游动和逃生能力来阻止生殖和交配，并增加对co足类的捕食压力。在2009年冬末，我们从塞纳河河口收集了pe足类Eurytemora affinis，并将其保存在实验室中。我们培养了被纤毛表生动物兽疫菌侵染的co足类动物。在实验室条件下与未感染的co足类动物分开放置一个月。然后，我们使用2D红外视频技术记录了重度感染和干净的co足类动物的行为，并分析了使用适当的统计方法获得的轨迹。轨迹显示，就游泳活动（休息，巡航，下沉和跳跃）而言，大量表皮生物的存在可能会对宿主的行为产生负面影响。女性的受影响要小于男性。侵染的高比例也极大地影响了交配成功。培养一周后，交配很少见，几乎不存在。这项研究表明，仿射在其生命的关键时期可能会面临一些困难。在冬季末期，该种群主要由低温水里的老old足类动物组成。有限的食物资源和它们身上的Epibion​​t最终会削弱the足类动物，从而削弱它们的交配成功并降低其成活率。

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    Anissa Souissi; Sami Souissi; Jiang-Shiou Hwang;

  • 作者单位

    Universite Lille Nord de France, F-59000 Lille, France USTL, LOG, Station Marine de Wimereux, F-62930 Wimereux, France CNRS, UMR 8187, F-62930 Wimereux, France;

    Universite Lille Nord de France, F-59000 Lille, France USTL, LOG, Station Marine de Wimereux, F-62930 Wimereux, France CNRS, UMR 8187, F-62930 Wimereux, France USTL, LOG, Station Marine de Wimereux, F-62930 Wimereux,France;

    Institute of Marine Biology, Zooplankton and Coral Reef Laboratory, National Taiwan Ocean University, 202 Keelung, Taiwan;

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  • 关键词

    Epibiont ciliate; Copepod; Eurytemora affinis; Swimming behavior; Mating success;

    机译：外生纤毛虫;pe足类;Eurytemora affinis;游泳行为;交配成功;

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