魚類学雑誌
Online ISSN : 1884-7374
Print ISSN : 0021-5090
ISSN-L : 0021-5090
記録・調査報告
水槽で観察したアユなわばりの垂直距離と水平距離
本田 晴朗山本 亮介
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ジャーナル 認証あり

2018 年 65 巻 2 号 p. 205-209

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The height and horizontal distance of territorial attacks by ayu (Plecoglossus altivelis altivelis) were observed in aquaria. Territory holders responded towards intruders when approached to within 30–40 cm, chasing them for 40–100 cm. Such chases ceased ca. 30–40 cm from the bottom (in 50–100 cm water depth), indicating that territorial defense limits in water depths greater than 50 cm were about 30–40 cm (vertical distance) and 40–100 cm (horizontal distance).

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© 2018 The Ichthyological Society of Japan
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