Reproductive interference and inhibition of reproductive behaviour between rosy bitterling (<i>Rhodeus ocellatus ocellatus</i>) and Itasenpara bitterling (<i>Acheilognathus longipinnis</i>)

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  • タイリクバラタナゴ<i>Rhodeus ocellatus ocellatus</i>によるイタセンパラ<i>Acheilognathus longipinnis</i>への繁殖干渉および繁殖行動の阻害
  • タイリクバラタナゴRhodeus ocellatus ocellatusによるイタセンパラAcheilognathus longipinnisへの繁殖干渉および繁殖行動の阻害
  • タイリクバラタナゴ Rhodeus ocellatus ocellatus ニ ヨル イタセンパラ Acheilognathus longipinnis エ ノ ハンショク カンショウ オヨビ ハンショク コウドウ ノ ソガイ

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Abstract

<p>Reproductive interference and inhibition of reproductive behaviour between two sympatric bitterlings (Itasenpara bitterling, Acheilognathus longipinnis, and rosy bitterling, Rhodeus ocellatus ocellatus) were observed in the Moo River, Himi City, Toyama Prefecture, Japan. Male rosy bitterling and female Itasenpara bitterling individuals formed pairs, subsequently exhibiting interspecific reproductive behaviour. However, female Itasenpara bitterlings failed to lay eggs. Furthermore, rosy bitterlings attacked male Itasenpara bitterlings that defended territories around freshwater mussels, resulting in the latter abandoning their territories. This is the first report of rosy bitterlings negatively impacting the reproductive behaviour of Itasenpara bitterlings.</p>

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