The populations of Japanese bitterlings and unionid mussels and the land use of the watershed were investigated in 36 sampling sites in the Tatara river system in northern Kyushu, Japan. Five bitterling species were found in 11 sites in the system. Although Rhodeus ocellatus kurumeus was found to be distributed in 23 sites in 1983, this species was found in three sites in this study. The population of the bitterlings decreased in the sites with a high urbanization rate, although the populations of several other fish species showed no dependence on the urbanization rate. The population of the mussels showed a negative correlation with urbanization rate. In addition, the mussels populations showed positive relationship with the bitterling populations. These three relationships indicate that the decrease in the bitterling population due to the urbanization of the watershed was responsible for the decrease in the mussel population.
内容記述
近縁外来種の侵入が在来種に与える生態・遺伝的影響に関する実証的研究
雑誌名
水環境学会誌 Journal of Japan Society on Water Environment
巻
29
号
12
ページ
837 - 842
発行年
2010-01-09
ISSN
0916-8958
書誌レコードID
AN10372439
権利
公益社団法人 日本水環境学会の許諾を得て公開しています
フォーマット
application/pdf
著者版フラグ
publisher
その他のタイトル
Change in Disｔｒibution of Bitterlings, and Eｆｆects Of Urbanization on Populations of Bitterlings and Unionid Mussles in Tatara River System, Kyushu, Japan
多々良川水系におけるタナゴ類の分布域の推移とタナゴ類・二枚貝の生息に及ぼす都市化の影響
50A5981.pdf
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