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タイトルヨミ
シンジコ スイケイ ニ オケル ヤマト シジミ コタイ グン ブンプ ノ チョウキテキ ヘンドウ
日本語以外のタイトル
Long-term fluctuation of the brackish-water bivalve Corbicula japonica population in the coastal waters of Lake Shinji, western Japan
ファイル
言語
日本語
著者
森脇 晋平
内容記述(抄録等)
The distribution and population density of the brackish-water bivalve, Corbicula japonica, in the coastal waters of Lake Shinji were summarized from the literature. It is thought that the primary habitat of C.japonica was limited to the vicinity of the Oohashi River before the early Showa era. Population density was relatively low, slightly less than 1,000inds./m^2 from 1930 to 1960. After that, the population density of C. japonica began to increase starting in the mid-1960 s and rose to its highest level-10,000~20,000 inds./m^2-in the 1980 s. The increase of C.japonica coincides with a significant increase in chl-a, implying the development of better food resources for C. japonica. On the other hand, the area inhabited narrowed to the lake shore shelf. Although a large die-off of C. japonica occurred in the autumn of 1997, the population density of C. japonica has recovered rapidly, i.e. the population has maintained a density of 5,000-10,000 inds./m^2 since 1999.
主題
Corbicula japonica
Lake Shinji
population density
掲載誌名
Laguna : 汽水域研究
11
開始ページ
31
終了ページ
41
ISSN
21852995
発行日
2004-06
NCID
AN10439529
出版者
島根大学汽水域研究センター
資料タイプ
紀要論文
ファイル形式
PDF
著者版/出版社版
出版社版
部局
研究・学術情報本部 エスチュアリー研究センター
他の一覧