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有栖川宮記念公園 2024年度生物調査ニュースレター
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Minato City published a newsletter on the FY2024 biological survey of the pond in Arisugawa-no-miya Memorial Park. Following the dredging work in February 2023, changes in the populations of native and invasive species were observed, including a rebound of bluegill and a sharp decline in stone moroko (motsugo) by September 2024. The city plans to continue monitoring the pond's ecosystem.
| What | 有栖川宮記念公園池の2024年度生物調査結果の報告（ニュースレターの発行） |
|---|---|
| Who | 記載なし |
| When | 2024年度（令和7年1月発行） |
| Where | 有栖川宮記念公園池 |
| How | カゴ罠、ペット罠、任意採集による捕獲調査 |
| Deadline | 記載なし |
| Contact | 港区 環境課 緑化推進担当 03-3578-2330 |
Open the original PDF ↗ 2 pages
Source page: https://www.city.minato.tokyo.jp/ryokukasuishin/kankyo-machi/kankyo/seibutsu/documents/seibutucyosa.html
Checked 2026-09-17. This page restates the PDF in a fixed structure; nothing is added or removed. Where the PDF does not say, the field reads "not stated". The original Japanese PDF is authoritative — confirm dates and conditions there.