書誌事項
- タイトル別名
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- Specimens of the Japanese native crayfish <i>Cambaroides japonicus </i>(De Haan, 1841) and ectosymbiotic crayfish worms (Branchiobdellida) collected from Lake Akan in Hokkaido, northern Japan, in 1872: observation of the specimens preserved by Dr. Saburo Hatta
- 1872ネン ニ ホッカイドウアカンコ デ サイシュウ サレタ ニホンザリガニ ヒョウホン ト シュツゲン シタ ヒルミミズルイ : ハッタ サブロウ ヒョウホン ノ カンサツ
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In Lake Akan, Hokkaido, northern Japan, the local population of the native and endangered Japanese crayfish Cambaroides japonicus (De Haan, 1841) is extinct, whereas the signal crayfish Pacifastacus leniusculus (Dana, 1852), an invasive species from North America, has become established and rapidly increased. This study provides information about specimens of C. japonicus preserved by Dr. Saburo Hatta from the lake in 1872. The six specimens (two males and four non-ovigerous females) are valuable evidence of C. japonicus formerly inhabiting Lake Akan. The body sizes of the specimens were 24.4–29.5 mm in carapace length and 55.7–67.4 mm in total length, and the estimated age of the largest specimen was ten years, indicating that Lake Akan of that time provided a suitable habitat. Twenty-two ectosymbiotic crayfish worms (Annelida, Clitellata, Branchiobdellida) were found attached to the specimens. Three branchiobdellidan species were identified: Cirrodrilus cirratus Pierantoni, 1905, C. inukaii (Yamaguchi, 1934) and C. megalodentatus (Yamaguchi, 1934). This is the first record of the latter two species from Lake Akan.
収録刊行物
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- 日本ベントス学会誌
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日本ベントス学会誌 69 (2), 90-94, 2014
日本ベントス学会
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詳細情報 詳細情報について
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- CRID
- 1390001204472561152
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- NII論文ID
- 130005124650
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- NII書誌ID
- AA11376003
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- ISSN
- 1883891X
- 1345112X
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- NDL書誌ID
- 026082335
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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