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タイトルヨミ
ナカウミ ニ オケル ミズクラゲ ノ ブンプ ト セイチョウ ヨホウ
日本語以外のタイトル
Spatial distribution and growth of Jellyfish Aurelia aurita (Linnaeus)
ファイル
言語
日本語
著者
檜山 盛生
宮本 康
内容記述(抄録等)
In the recent brackish lagoon Lake Nakaumi, the basic ecological insights of jellyfish
are needed to be clarified since their nuisance to fisheries is becoming serious. Here, we conducted field observations in order to clarify spatial distribution and growth patterns of Aurelia aurita (Linnaeus) in brackish lagoon Lake Nakaumi. We counted medusa visually in ca. 5×5m surface water and measured their diameter at six sites in May, August, September, and October. The observations detected that the medusa diameter significantly larger in August than May, however, not differed among August, September, and October, in addition, two peaks in the size distribution in May became one peak after August with disappearing larger size class. These suggest that major growth of medusa occurs during spring to early summer and that recruitment of pelagic medusa from benthic polyp occurs before spring. The observations also found that the medusa distributed in an aggregative manner, and the aggregation became more intense as wind velocity became larger. The results provide us basic ecological insights of jellyfish, however, our findings could not cover all of the fishermen’s findings, such as the wind direction dependent aggregation pattern and the depth distribution. In order to provide useful suggestions for fisheries, continuous research is needed.
主題
Jellyfish
Aurelia auria (Linnaeus)
spatial distribution
size distribution
掲載誌名
Laguna : 汽水域研究
16
開始ページ
1
終了ページ
6
ISSN
21852995
発行日
2009-06
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
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