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北海道大学水産科学研究彙報 = Bulletin of Fisheries Sciences, Hokkaido University >
第63巻 第3号 >

光学式プランクトンカウンターによる北太平洋外洋域における 動物プランクトン群集の空間変動解析

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Title: 光学式プランクトンカウンターによる北太平洋外洋域における 動物プランクトン群集の空間変動解析
Other Titles: Spatial Changes in Mesozooplankton Community Structure in the North Pacific : Analyses by Optical Plankton Counter
Authors: 塩田, 知也1 Browse this author
阿部, 義之2 Browse this author
齋藤, 類3 Browse this author
松野, 孝平4 Browse this author
山口, 篤5 Browse this author →KAKEN DB
今井, 一郎6 Browse this author →KAKEN DB
Authors(alt): Shiota, Tomoya1
Abe, Yoshiyuki2
Saito, Rui3
Matsuno, Kohei4
Yamaguchi, Atsushi5
Imai, Ichiro6
Keywords: Mesozooplankton
Neocalanus copepods
Normalized biovolume size spectra (NBSS)
Optical plankton counter (OPC)
Size
Issue Date: 10-Dec-2013
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: 63
Issue: 3
Start Page: 13
End Page: 22
Abstract: Analyses by Optical Plankton Counter (OPC) were made on mesozooplankton samples (n = 1,396) collected by NORPAC net from 0-150 m along eight north-south transects (located 35-60°N, 144°E-145°W) covering whole area of North Pacific during May to August of 1981-2009. Based on OPC data, spatial (north-south and east-west) changes in mesozooplankton abundance, biovolume and Normalized Biovolume Size Spectra (NBSS) were evaluated. Throughout the transects, north-south variations in zooplankton communities were similar : i.e. abundance was greater in the subarctic (SA) region, biovolume was greater in the transitional (TR) region and slope of NBSS was moderate in TR. High biovolume and moderate NBSS slope in TR were caused by the dominance of late copepodid stages (C5) of Neocalanus copepods. While zooplankton fauna was similar through SA and TR (subarctic fauna), high temperature in TR could be accelerate copepod growth, and induce dominance of Neocalanus C5 there. Concerning east-west differences, zooplankton abundance and biovolume tended to be greater in the western transects. High zooplankton abundance and biovolume in the western regions would be caused by the east-west differences in primary productivity, which reported to be reflection of the east-west gradients in iron concentration.
Type: bulletin (article)
URI: http://hdl.handle.net/2115/53985
Appears in Collections:北海道大学水産科学研究彙報 = Bulletin of Fisheries Sciences, Hokkaido University > 第63巻 第3号

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