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Seasonal Distribution and Growth of Sphaerium (Musculium) japonicum (Bivalvia ; Sphaeriidae) in Lake Suwa, Japan
http://hdl.handle.net/10091/10626
http://hdl.handle.net/10091/106263344d77c-25e4-415f-80fc-89927bf001e1
名前 / ファイル | ライセンス | アクション |
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Science29-01-04.pdf (309.0 kB)
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Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
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公開日 | 2010-10-06 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Seasonal Distribution and Growth of Sphaerium (Musculium) japonicum (Bivalvia ; Sphaeriidae) in Lake Suwa, Japan | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | departmental bulletin paper | |||||
著者 |
PARK, Jecheol
× PARK, Jecheol× OKINO, Tokio |
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出版者 | ||||||
出版者 | 信州大学理学部 | |||||
引用 | ||||||
内容記述タイプ | Other | |||||
内容記述 | 信州大学理学部紀要 29(1): 49-56(1994) | |||||
書誌情報 |
信州大学理学部紀要 巻 29, 号 1, p. 49-56, 発行日 1994-10-31 |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | seasonal changes in the distribution and the growing characteristics of Sphaerium (Musculium) japonicum were investigated in Lake suwa from June 20 to November 11, 1993. The main distribution area of S. (Musculium) Japonicum transfered from the littoral zone to the lake center with increasing water temperature, and began to retransfer to the littoral zone with decreasing dissolved oxygen content of bottom water. Thereafter, their distribution in the lake was at random. The organic contents of bottom mud in Lake Suwa were 13.5-15.6%, but they were no influence on the movement of S. (Musculium) Japonicum. In vitro, their migration speed was 50 cm per hour at 16.9℃ water temperature (D. O. 7.52 mg/l), and their movement distance per minute corresponded to their shell length. All adults of S. (Musculium) japonicum were taken from June 21 to September 24 held juveniles inside them. The maximum size of the inside juveniles was 1.71 mm, and the minimum size of the outside adult was 1.59 mm. The young taken from the lake grew up to 1.92-2.12 mm in nature and to 2.25-2.55 mm in vitro after 100 days. The growth rate was 0.1 mm in one month in natural conditions, against 2 weeks in vitro. The living shells of juvenile decreased to 50% during 50 days in vitro, and after that remained stable for 50-100 days. | |||||
資源タイプ(コンテンツの種類) | ||||||
内容記述タイプ | Other | |||||
内容記述 | Article | |||||
ISSN | ||||||
収録物識別子タイプ | PISSN | |||||
収録物識別子 | 0583-063X | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA00697923 | |||||
出版タイプ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 |