Does construction in the spawning ground improve the riverbed conditions making it suitable for spawning of the Ryukyu-ayu Plecoglossus altivelis ryukyuensis?

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Published
2020-11
Resource Type
journal article
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  • © The Ichthyological Society of Japan. This is a post-peer-review, pre-copyedit version of an article published in Ichthyological Research. The final authenticated version is available online at: https://doi.org/10.1007/s10228-020-00745-7
DOI
  • 10.1007/s10228-020-00745-7
Publisher
Springer

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Maintaining a certain number of spawning grounds for endangered fish is particularly important in rivers and streams where the environment changes drastically through floods and exploitations. Ryukyu-ayu Plecoglossus altivelis ryukyuensis is an endangered annual fish inhabiting the few streams and rivers flowing through the Amami-Oshima Island, southern Japan, and spawns in the lower reaches at sites with the specific riverbed conditions. In the island, resident volunteers along with researchers modify riverbed manually to provide conditions suitable for the natural spawning of the fish every year....

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