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首页> 外文期刊>Marine ecology progress series >Habitat preference rather than predation risk determines the distribution patterns of filefish Rudarius ercodes in and around seagrass habitats
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Habitat preference rather than predation risk determines the distribution patterns of filefish Rudarius ercodes in and around seagrass habitats

机译：栖息地的偏好而不是掠食风险决定着海草栖息地及其周围的斑鱼Rudarius ercodes的分布方式

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摘要

Using field and laboratory experiments, this study examined the mechanisms that determine the distribution patterns of the filefish Rudarius ercodes, one of the most dominant sea-grass habitat fishes in temperate Japan. Few individuals were preyed on in a field tethering experiment, suggesting a relatively low predation risk, even in the open bare sand and mud areas around seagrass habitats. In the laboratory, predator presence or absence did not affect filefish distribution, with filefish mostly staying in the area planted with seagrass, even when predators were absent in the open bare area. Filefish showed a strong preference for the structure provided by seagrass, staying significantly longer in the seagrass area (despite a lack of food) than in the area with food but devoid of seagrass. Faced with the choice of both seagrass and food, and seagrass without food, even satiated filefish, which showed lower foraging activity, remained significantly longer in the seagrass area with food, suggesting an additional preference for seagrass with abundant epiphytic food. Accordingly, habitat preference may be the most important factor determining the distribution patterns of filefish, which may primarily select seagrass habitats via an intrinsic preference for the structure provided by seagrass, with their distribution pattern subsequently being modified by food availability via a preference for seagrass with abundant epiphytic food.
机译：通过野外和实验室实验，这项研究检查了确定斑纹鱼Rudarius ercodes（日本温带地区最主要的海草栖息地鱼类之一）的分布方式的机制。很少有人在野外系留实验中被捕食，这表明即使在海草栖息地周围裸露的沙子和泥泞地区，捕食风险也相对较低。在实验室中，捕食者的存在或不存在都不会影响鱼的分布，即使在空旷的裸露地区没有捕食者，鱼也大多留在海草种植的地区。 Filefish对海草提供的结构表现出强烈的偏好，在海草区域（尽管缺乏食物）的停留时间比有食物但没有海草的区域停留的时间长得多。面对海草和食物的选择以及不带食物的海草，即使觅食活动低的饱腹的斑纹鱼，在带食物的海草区域中的停留时间也明显更长，这表明对附生丰富的食物的海草还有更多的偏好。因此，栖息地偏好可能是决定斑马鱼分布方式的最重要因素，它可能首先通过对海草提供的结构的内在偏好来选择海草栖息地，其分布方式随后会因对海草的偏好而被食物供应量所改变。丰富的附生食物。

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  • 来源
    《Marine ecology progress series》 |2013年第15期|255-266|共12页
  • 作者

    Masahiro Horinouchi; Naoki Mizuno; Yuka Jo; Masashi Fujita; Yuzuru Suzuki; Futoshi Aranishi; Mitsuhiko Sano;

  • 作者单位

    Research Center for Coastal Lagoon Environments, Shimane University, 1060 Nishikawatsu-cho, Matsue, Shimane 6908504, Japan;

    Fisheries Laboratory, Graduate School of Agricultural and Life Sciences, University of Tokyo, 2971-4 Bentenjima, Maisaka, Hamamatsu, Shizuoka 4310214, Japan;

    Fisheries Laboratory, Graduate School of Agricultural and Life Sciences, University of Tokyo, 2971-4 Bentenjima, Maisaka, Hamamatsu, Shizuoka 4310214, Japan;

    Fisheries Laboratory, Graduate School of Agricultural and Life Sciences, University of Tokyo, 2971-4 Bentenjima, Maisaka, Hamamatsu, Shizuoka 4310214, Japan;

    Fisheries Laboratory, Graduate School of Agricultural and Life Sciences, University of Tokyo, 2971-4 Bentenjima, Maisaka, Hamamatsu, Shizuoka 4310214, Japan;

    Research Center for Coastal Lagoon Environments, Shimane University, 1060 Nishikawatsu-cho, Matsue, Shimane 6908504, Japan;

    Laboratory of Aquatic Conservation, Graduate School of Agricultural and Life Sciences, University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 1138657, Japan;

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  • 正文语种 eng
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  • 关键词

    Seagrass fish distribution pattern; Habitat preference; Predation risk; Food availability;

    机译：海草鱼的分布格局;栖息地偏爱;捕食风险;食物供应;

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