ドロクイ属2 種の分布および生息環境： 近年の沿岸域の改変と交雑個体の出現の関係

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  • 上原 匡人
    沖縄県水産海洋技術センター 琉球大学大学院理工学研究科海洋環境学専攻
  • 今井 秀行
    琉球大学理学部海洋自然科学科
  • 岩本 健輔
    沖縄県水産海洋技術センター 株式会社WDB環境バイオ研究所
  • 太田 格
    沖縄県水産海洋技術センター
  • 海老沢 明彦
    沖縄県水産海洋技術センター
  • 吉野 哲夫
    琉球大学理学部海洋自然科学科 沖縄美ら島財団総合研究センター
  • 立原 一憲
    琉球大学理学部海洋自然科学科

書誌事項

タイトル別名
  • Distribution patterns and habitat preferences of two <i>Nematalosa</i> species, including the influence of recent environmental changes and the occurrence of natural hybridization
  • ドロクイゾク 2シュ ノ ブンプ オヨビ セイソク カンキョウ : キンネン ノ エンガンイキ ノ カイヘン ト コウザツ コタイ ノ シュツゲン ノ カンケイ

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説明

<p>Accurate descriptions of distribution and habitat are important for effective We examined the distribution patterns and habitat preferences of two related gizzard shads, Nematalosa japonica and N. come, based on specimens, reports and fish market research in the Ryukyu Archipelago. Both species are N. japonica to the north of Okinawa-jima Island, and come in waters off Amami-ohshima Island and the Okinawa Islands, thereby being distributed at Amami-oshima Island and Okinawa-jima Island. Natural between the two species, found only at Okinawa-jima Island indicated that is a natural hybrid zone. Analysis using a random forest method and fish market N. japonica was most affected by tidal flat type tidal flats), the species being dominant in restricted fishing grounds (Nakagusuku and Haneji coastal waters) that include many coastal tidal flats. However, N. come fected by bottom sediment type, the species being dominant in a of fishing grounds (Kin and Nago Bays, and Nanbu-higashi, Nago-higashi, Nakijin Shioya coastal waters). Thus, the distribution pattern of the two species at OkinawaIsland was affected by environmental factors, such as tidal flat type, and area and sediments. Our findings indicated a clear discontinuity in home range between the fort (CPUE) of the two species has highly altered environments. These findings indicated that the diminution of suitable Okinawan populations of both species. Accordingly, the two Nematalosa species are as being of good indicators of the health and conservation of shallow areas, such as tidal flats. Shallow habitats should be conserved to preserve healthy populations of the two species.</p>

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  • 魚類学雑誌

    魚類学雑誌 62 (1), 13-28, 2015

    一般社団法人 日本魚類学会

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