魚類学雑誌
Online ISSN : 1884-7374
Print ISSN : 0021-5090
ISSN-L : 0021-5090
奄美大島住用湾および焼内湾周辺におけるリュウキュウアユ仔稚魚の回帰遡上
岸野 底四宮 明彦
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ジャーナル フリー

2005 年 52 巻 2 号 p. 115-124

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To clarify the early life period distribution and migration pattern of Ryukyu-ayu (Plecoglossus altivelis ryukyuensis), investigations were conducted around Sumiyo and Yakeuchi Bays, Amamioshima Island, southern Japan, from November-2001 to May-2002. Larvaeand juveniles (from ca. 10 mm SL; 10 dayold) were present in brackish water inlets and near coastal shorelines, their persistence and frequency in brackish waters being longer and greater, respectively, than in seawater areas (recorded for only a few days in latter). Therefore, it was concluded that brackish waters were more important as nursery grounds for larvae and juveniles of Ryukyu-ayu than seawater areas.

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