Japanese eel Anguilla japonica and aquatic animals collected with Ishi-kura net in the Iroha and Katsura Rivers, Oita Prefecture, Japan

Mami Harada, Manabu Kume, Noritaka Mochioka, Yuji Tamura, Toko Kanzaki, Shunya Hashiguchi, Akihide Kasai, Yoh Yamashita

研究成果: ジャーナルへの寄稿記事

2 引用 (Scopus)

抄録

Local people in Oita Prefecture perform a traditional fishery called the Ishi-kura fishing method in estuaries. Ishi-kura is an underwater pile of approximately 0.5 tons of stones 15-30 cm in diameter, and wild eels dwell inside the pile and are caught using nets.We examined the relationship between Japanese eel Anguilla japonica and aquatic animals caught with an Ishi-kura net which was modified for aquatic animal research, in the Iroha and Katsura Rivers, Oita Prefecture, Japan. Based on community structure analysis, the aquatic animal community in the Ishi-kura net consisting of 54 taxonomic animals was divided into two groups by distance from the river month and substrate; the upstream group mainly contained the genus Hemigrapsus and genus Batillaria, and the downstream one predominantly contained Macrobrachium nipponense and Clithon retropicta. Based on stomach content analysis, 39 out of 79 eels consumed the same aquatic animal groups found in Ishi-kura. However, eels inhabiting downstream mainly preyed on mud shrimp, and those inhabiting upstream predominantly fed on crab, suggesting that eels may not use Ishi-kura for feeding but for living space. These findings suggest that Ishi-kura nets may be useful for monitoring eels as well as aquatic animals as their potential prey items.

元の言語英語
ページ(範囲)45-53
ページ数9
ジャーナルNippon Suisan Gakkaishi (Japanese Edition)
84
発行部数1
DOI
出版物ステータス出版済み - 1 1 2018

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Anguilla japonica
eel
Japan
rivers
river
animals
Hemigrapsus
pile
animal research
animal community
stomach content
crabs
stomach
shrimp
community structure
estuaries
fisheries
aquatic animal
crab
fishing

All Science Journal Classification (ASJC) codes

  • Aquatic Science

これを引用

Japanese eel Anguilla japonica and aquatic animals collected with Ishi-kura net in the Iroha and Katsura Rivers, Oita Prefecture, Japan. / Harada, Mami; Kume, Manabu; Mochioka, Noritaka; Tamura, Yuji; Kanzaki, Toko; Hashiguchi, Shunya; Kasai, Akihide; Yamashita, Yoh.

:: Nippon Suisan Gakkaishi (Japanese Edition), 巻 84, 番号 1, 01.01.2018, p. 45-53.

研究成果: ジャーナルへの寄稿記事

Harada, Mami ; Kume, Manabu ; Mochioka, Noritaka ; Tamura, Yuji ; Kanzaki, Toko ; Hashiguchi, Shunya ; Kasai, Akihide ; Yamashita, Yoh. / Japanese eel Anguilla japonica and aquatic animals collected with Ishi-kura net in the Iroha and Katsura Rivers, Oita Prefecture, Japan. :: Nippon Suisan Gakkaishi (Japanese Edition). 2018 ; 巻 84, 番号 1. pp. 45-53.
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abstract = "Local people in Oita Prefecture perform a traditional fishery called the Ishi-kura fishing method in estuaries. Ishi-kura is an underwater pile of approximately 0.5 tons of stones 15-30 cm in diameter, and wild eels dwell inside the pile and are caught using nets.We examined the relationship between Japanese eel Anguilla japonica and aquatic animals caught with an Ishi-kura net which was modified for aquatic animal research, in the Iroha and Katsura Rivers, Oita Prefecture, Japan. Based on community structure analysis, the aquatic animal community in the Ishi-kura net consisting of 54 taxonomic animals was divided into two groups by distance from the river month and substrate; the upstream group mainly contained the genus Hemigrapsus and genus Batillaria, and the downstream one predominantly contained Macrobrachium nipponense and Clithon retropicta. Based on stomach content analysis, 39 out of 79 eels consumed the same aquatic animal groups found in Ishi-kura. However, eels inhabiting downstream mainly preyed on mud shrimp, and those inhabiting upstream predominantly fed on crab, suggesting that eels may not use Ishi-kura for feeding but for living space. These findings suggest that Ishi-kura nets may be useful for monitoring eels as well as aquatic animals as their potential prey items.",
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AU - Tamura, Yuji

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