| Item type |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2016-06-30 |
| タイトル |
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タイトル |
Bathymetric distribution of aquatic Oligochaeta in Lake Kizaki, Central Japan |
| 言語 |
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言語 |
eng |
| DOI |
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関連識別子 |
https://doi.org/10.11646/zoosymposia.9.1.8 |
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関連名称 |
10.11646/zoosymposia.9.1.8 |
| キーワード |
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主題 |
aquatic Oligochaeta, density, bathymetric distribution, Lake Kizaki, Tubifex tubifex (Müller, 1774) |
| 資源タイプ |
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資源 |
http://purl.org/coar/resource_type/c_6501 |
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タイプ |
journal article |
| 著者 |
Hirabayashi, Kimio
Oga, Keiko
Yamamoto, Masamichi
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| 信州大学研究者総覧へのリンク |
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氏名 |
Hirabayashi, Kimio |
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URL |
http://soar-rd.shinshu-u.ac.jp/profile/ja.WpTCjekV.html |
| 出版者 |
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出版者 |
Magnolia Press |
| 引用 |
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内容記述 |
Zoosymposia. 9:36-43 (2014) |
| 書誌情報 |
Zoosymposia
巻 9,
p. 36-43,
発行日 2014
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| 抄録 |
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内容記述 |
Bathymetric distribution of aquatic oligochaetes was studied at 8 stations with different depths (mean depth 16.7 ± 9.4 m, min. 5.3 m, max. 29.4 m) in July 2012 in mesotrophic Lake Kizaki, Nagano Prefecture, Central Japan. The average density was 10424 ± 5346 individuals m-2. Oligochaetes were numerically dominant at all sampling stations. High density, sometimes more than 10000 individuals m-2,was recorded at 3 stations (St. 4, 5, and 6) deeper than 18 m. Maximum density was 20561 ± 13864 individuals m-2 at Station 4 (depth 29.4 m, ignition loss of sediment 13.5%, bottom water temperature 8.1 °C and DO of bottom water 0.12 mg l-1). We identified a total of 5 genera and 7 species belonging to three subfamilies: i.e., 1 species of Naidinae, 2 species of Rhyacodrilinae and 4 species of Tubificinae. Dominant species (in order of abundance) were Tubifex tubifex (Müller, 1774) (8550 ± 6317 individuals m-2; 82.0%) and Limnodrilus spp. (L. hoffmeisteri Claparède, 1862 and L. claparedeianus Ratzel, 1868) (1710 ± 1383 individuals m-2; 16.4%). Tubifex and Limnodrilus were obtained from every station, and the density of T. tubifex tended to be higher as the depth became greater, while Limnodrilus spp. was also widely distributed, but with a peak value at a depth of 5.3 m in the shallowest station. From the submerged plant zone, Ophidonais serpentina (Müller, 1773) was collected. An earlier study by Hirabayashi & Hayashi (1994) showed that in 1985 the average density of aquatic oligochaetes was 435 ± 428 individuals m-2, oligochaetes dominated in only four locations and were distributed over the whole lake approximately equally. Comparisons of our data with the earlier studies have shown that oligochaete density has increased greatly according to Hirabayashi & Hayashi (1994). We suggest that a decrease in dissolved oxygen concentration of bottom water was due to an increase in organic matter content of the sediment. As a result, T. tubifex could expand their habitats in the profundal zone. |
| 資源タイプ（コンテンツの種類） |
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| ISSN |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
1178-9913 |
| 権利 |
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権利情報 |
Copyright © 2014 Magnolia Press |
| 出版タイプ |
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出版タイプ |
VoR |
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出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
Bathymetric_distribution_ aquatic_Oligochaeta_Lake_Kizaki.pdf (828.4 kB)
