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北海道大学水産科学研究彙報 = Bulletin of Fisheries Sciences, Hokkaido University >
第68巻 第1号 >

大阪湾における麻痺性貝毒原因渦鞭毛藻Alexandrium tamarenseと珪藻Skeletonema sp.の栄養塩利用性の比較

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Title: 大阪湾における麻痺性貝毒原因渦鞭毛藻Alexandrium tamarenseと珪藻Skeletonema sp.の栄養塩利用性の比較
Other Titles: Comparison of nutrient availabilities between the toxic dinoflagellate Alexandrium tamarense and the non-toxic diatom Skeletonema sp. in Osaka Bay, Japan
Authors: 夏池, 真史1 Browse this author
山本, 圭吾2 Browse this author
中嶋, 昌紀3 Browse this author
澤山, 茂樹4 Browse this author
今井, 一郎5 Browse this author →KAKEN DB
Authors(alt): Natsuike, Masafumi1
Yamamoto, Keigo2
Nakajima, Masaki3
Sawayama, Shigeki4
Imai, Ichiro5
Keywords: Alexandrium tamarense
Osaka Bay
Algal growth potential
Issue Date: 16-Mar-2018
Publisher: 北海道大学大学院水産科学研究院
Journal Title: 北海道大学水産科学研究彙報
Volume: 68
Issue: 1
Start Page: 17
End Page: 26
Abstract: Alexandrium tamarense is a toxic dinoflagellate known to cause paralytic shellfish poisoning to human and marine animals. Previous studies observed the depletion of macronutrients during the A.tamarense blooming periods in Osaka Bay, Japan, and suggest the different nutrient availabilities between surface and bottom layers allow A.tamarense to grow. In this study, the field observation and Algal growth potential(AGP) bioassay with A.tamarence and non-toxic, dominant diatom Skeletonema sp. in Osaka Bay are conducted to compare the nutrient availabilities during the period of A.tamarense occurrences in the Bay. The field observations confirmed the depletion of dissolved inorganic nitrogen, PO4-P, and SiO2-Si concentrations with the A.tamarense occurences in spring. The phosphorous limitation to both speicies at surface layer were frequently determined by the AGP bioassay in spring. The bioassay also revealed the higher AGP of both species at deeper water than those at surface water and different limiting nutrients between surface and bottom waters or between A.tamarense and Skeletonema sp. These different nutrient availabilities probably allow A.tamarense and dominant diatoms to coexist and grow Osaka Bay during spring.
Type: bulletin (article)
Appears in Collections:北海道大学水産科学研究彙報 = Bulletin of Fisheries Sciences, Hokkaido University > 第68巻 第1号

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