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
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- NAKATA Kazuyoshi
- Graduate School of Environmental and Life Science, Okayama University
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- NAGANO Yuki
- Faculty of Fisheries Sciences, Hokkaido University
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- OHASHI Shinpei
- Department of Zoology, National Museum of Nature and Science
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- KAWAI Toshio
- Fisheries Science Center, Hokkaido University Museum
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- OHTAKA Akifumi
- Faculty of Education, Hirosaki University
Bibliographic Information
- Other Title
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- 1872年に北海道阿寒湖で採集されたニホンザリガニ標本と出現したヒルミミズ類:八田三郎標本の観察
- 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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Abstract
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.
Journal
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- Japanese Journal of Benthology
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Japanese Journal of Benthology 69 (2), 90-94, 2014
JAPANESE ASSOCIATION OF BENTHOLOGY
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Details 詳細情報について
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- CRID
- 1390001204472561152
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- NII Article ID
- 130005124650
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- NII Book ID
- AA11376003
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- ISSN
- 1883891X
- 1345112X
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- NDL BIB ID
- 026082335
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed