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首页> 外文期刊>Estuarine Coastal and Shelf Science >Where is the nursery for amphidromous nekton? Abundance and size comparisons of juvenile ayu among habitats and contexts
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Where is the nursery for amphidromous nekton? Abundance and size comparisons of juvenile ayu among habitats and contexts

机译：AmphidroMous Nekton的托儿所在哪里？栖息地和背景中少年艾苏的丰富和大小比较

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摘要

The use of estuarine and marine ecosystems by amphidromous fishes has not been thoroughly studied, especially with respect to habitat types. Here, abundance and size comparisons of juveniles of an amphidromous fish, ayu (Plecoglossus altivelis altivelis), were performed among four types of topographically distinct shallow, soft-bottom habitats across two different environmental contexts (marine and estuarine) through monthly seining along an estuary-ocean ecotone in southern Japan. Topography (open/enclosed and presence/absence of surf zone) and environmental parameters (water temperature and salinity) differed among the four habitats, i.e., riverine estuary, exposed beach, embayed beach, and lagoon estuary. The peak month of juvenile abundance also differed among habitats (riverine estuary in December, exposed beach in January, embayed beach and lagoon estuary in March), as did the mean standard length (riverine estuary exposed beach embayed beach lagoon estuary), although the abundance at embayed beach was significantly greater than in the two estuaries, and almost all size classes of juveniles occurred at embayed beach. A likely explanation for these patterns is that juvenile ayu select coastal habitats as they develop swimming ability and that riverine estuary/exposed beach, embayed beach, and lagoon estuary function as a corridor, primary nursery, and possible foraging ground, respectively. These findings, coupled with implications from previous studies of habitat selection in coasts by anadromous fishes, highlight the importance of seascape-level analysis for elucidating the nursery functions of coastal habitats, even for diadmmous nekton.Regional terms: North-western Pacific, East Asia, Japan, Kyushu, Miyazaki Prefecture.
机译：通过Amphidroomous鱼类使用河口和海洋生态系统的使用，特别是关于栖息地类型的习惯。在这里，在两种不同的环境背景（海洋和河口）的四种类型的地形不同的浅，软底栖症中，每月沿着河口的每月围绕两种不同的环境小区（海洋和河口）进行丰富和大小比较。 - 日本南部的海洋Ecotone。地形（开放/封闭的和冲浪区的存在/不存在）和环境参数（水温和盐度）不同的四栖息地不同，即河流河口，暴露的海滩，扶手海滩和泻湖河口。少年丰富的高峰月在栖息地（12月河道河口，1月份的暴露海滩，3月份的露天海滩），平均标准长度（河流河口<露天海滩<泻湖河口），虽然扶手海滩的丰度明显大于两个河口，但几乎所有大小的少年幼虫发生在扶手海滩。对这些模式的可能解释是少年AYU选择沿海栖息地，因为它们开发游泳能力，河流河口/暴露的海滩，扶手海滩和泻湖河口分别作为走廊，主要苗圃和可能的觅食地面。这些调查结果，加上亚洲鱼类海岸栖息地选择的栖息地选择的影响，突出了海景级别分析的重要性，以阐明沿海栖息地的苗圃职能，即使是迪丹·尼克顿。北方太平洋西北部，日本，九州，宫崎县。

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  • 来源
    《Estuarine Coastal and Shelf Science》 |2020年第31期|106831.1-106831.9|共9页
  • 作者

    Murase Atsunobu; Ishimaru Tetsuya; Ogata Yukiya; Yamasaki Yuta; Kawano Hidenobu; Nakanishi Kenji; Inoue Kaito;

  • 作者单位

    Univ Miyazaki Field Sci Ctr Nobeoka Marine Sci Stn 376-6 Akamizu Nobeoka Miyazaki 8890517 Japan|Univ Miyazaki Fac Agr Dept Marine Biol & Environm Sci 1-1 Gakuen Kibanadai Nishi Miyazaki 8892192 Japan;

    Univ Miyazaki Fac Agr Dept Marine Biol & Environm Sci 1-1 Gakuen Kibanadai Nishi Miyazaki 8892192 Japan;

    Univ Miyazaki Field Sci Ctr Nobeoka Marine Sci Stn 376-6 Akamizu Nobeoka Miyazaki 8890517 Japan|Univ Miyazaki Grad Sch Agr 1-1 Gakuen Kibanadai Nishi Miyazaki 8892192 Japan;

    Univ Miyazaki Field Sci Ctr Nobeoka Marine Sci Stn 376-6 Akamizu Nobeoka Miyazaki 8890517 Japan|Univ Miyazaki Grad Sch Agr 1-1 Gakuen Kibanadai Nishi Miyazaki 8892192 Japan;

    Miyazaki Prefectural Adv Fisheries Training Inst 2-11-6 Nishimachi Miyazaki 8870002 Japan;

    Miyazaki Prefectural Fisheries Res Inst 6-16-3 Aoshima Miyazaki 8892162 Japan;

    Miyazaki Prefectural Govt Fisheries Adm Div 2-10-1 Tachibana Dori Higashi Miyazaki 8808501 Japan;

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  • 正文语种 eng
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  • 关键词

    Diadromous; Estuary; Habitat selection; Plecoglossus altivelis; Sandy beach; Seascape;

    机译：日记;河口;栖息地选择;Plecoglossus Altivelis;沙滩;海景;

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