ダウンロード数 : ?
ID 6872
タイトルヨミ
エンブン ト スイオン ニオウジタ サルボウ Scapharca kagoshimensis ノ ロカ ソクド ト セイザンリツ ノ ヘンカ
日本語以外のタイトル
Changes in fi ltering and survival ratios of the ark shell Scapharca kagoshimensis depending on salinity and temperature
ファイル
言語
日本語
著者
宮本 康
初田 亜希子
内容記述(抄録等)
To clarify the optimal environmental conditions for the ark shell Scapharca kagoshimensis in the brackish lagoon Nakaumi, its fi ltration and survival rates under various salinity(9.4-31.4 psu)and temperature(8-31d)were examined by laboratory experiments. The fi ltration rate varied with varying salinity and temperature conditions. The rate was highest at intermediate salinity(18.8-22.0 psu)and lowest at low salinity(9.4 psu). Under the low salinity condition, fi ltration was not observed. In addition, the fi ltration rate was highest at summer temperature(27d)and lowest at winter one(8d). The survival rate also varied with varying salinity and temperature conditions. Dead individuals were only observed under the combination of hot summer temperature(31d)and low salinity(9.4-15.7 psu)conditions. In particular, the combination of 31d and<12.2 psu was critical for the shell, the survival rates were 0% and 25% at 9.4 psu and 12.2 psu, respectively. In the lagoon, where halocline is maintained whole through the year, the critical temperature and salinity for the shell’s filtration activity and survival were only recorded in shallow zones above halocline. Therefore, it is suggested that shallow zones above halocline is not suitable habitat for the ark shell.
主題
Scapharca kagoshimensis
filtration rate
survivorship
salinity
temperature
掲載誌名
Laguna : 汽水域研究
15
開始ページ
13
終了ページ
18
ISSN
21852995
発行日
2008-12
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