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首页> 外文期刊>Marine biology >Intertidal slope of coral sand beach as a unique habitat for fish: meiobenthic diet of the transparent sand dart, Kraemeria cunicularia (Gobiidae)
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Intertidal slope of coral sand beach as a unique habitat for fish: meiobenthic diet of the transparent sand dart, Kraemeria cunicularia (Gobiidae)

机译：珊瑚沙滩的潮间带坡面是鱼类的独特栖息地：透明沙镖的中底栖饮食，Craemeria cunicularia（Gobiidae）

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摘要

Coral sand beaches harbor gobiid sand darts (genus Kraemeria), the only fish known to live in the sand throughout their adult life. Despite the uniqueness of sand-dwelling habitat as a vertebrate, the biology of this fish remains unclear. To explore how this unique fish utilize an unusual habitat, we investigated diurnal patterns of microhabitat use and prey consumption by the transparent sand dart, Kraemeria cunicularia, at a sandy beach on Iriomote Island, the Ryukyu Archipelago, Japan. Sand darts were found in sediment in the lower intertidal zone throughout the daytime regardless of changes in tidal level, whereas at nighttime these fish were found swimming. Gut content analyses revealed that the sand dart diet was dominated by harpacticoid copepods throughout the day. Analyses of meiobenthic distribution indicated that these copepods were most abundant at lower intertidal zones where highest numbers of sand darts were found during the daytime; thus, it is possible that microhabitat use of the fish is largely determined by food availability. An extensive distributional survey throughout the Ryukyu Archipelago further indicated that sand darts prefer sandy beaches with well-sorted, coarse sand. These results provide novel insights into how sand darts respond to the tidal rhythm andrnhighlight putative key environmental factors that determine their distribution at both regional and microhabitat scales.
机译：珊瑚沙滩上有戈壁沙镖（Kraemeria属），这是成年后唯一生活在沙地中的鱼类。尽管沙栖生境作为脊椎动物具有独特性，但该鱼的生物学仍不清楚。为了探索这种独特的鱼类如何利用不同寻常的栖息地，我们在日本琉球群岛西表岛上的透明沙滩飞镖Kraemeria cunicularia调查了微生境的使用和猎物的日食模式。无论潮汐水平如何变化，白天在潮间带下部的沉积物中都发现了飞镖，而在夜间则发现这些鱼在游泳。肠含量分析表明，整天沙箭饮食都以类立足类pe足类动物为主。中底栖动物分布的分析表明，这些pe足类动物在潮间带较低的地区最为丰富，在白天，这些地区的飞镖数量最多。因此，鱼类的微生境利用可能很大程度上取决于食物的可获得性。在整个琉球群岛进行的一项广泛分布调查进一步表明，飞镖更喜欢沙滩，沙滩上的沙子分类好，粗糙。这些结果提供了新颖的见解，说明了飞镖如何响应潮汐节奏和高光推定的关键环境因素，这些因素决定了它们在区域和微生境尺度上的分布。

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  • 来源
    《Marine biology》 |2009年第9期|1739-1749|共11页
  • 作者

    Remi Tsubaki; Makoto Kato;

  • 作者单位

    Graduate School of Human and Environmental Studies, Kyoto University, Yoshida-Nihonmatsu-cho, Sakyo, Kyoto 606-8501, Japan;

    Graduate School of Human and Environmental Studies, Kyoto University, Yoshida-Nihonmatsu-cho, Sakyo, Kyoto 606-8501, Japan;

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