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Abundance, biomass and body size of the hydromedusa Aglantha digitale in the western and eastern subarctic Pacific during the summers of 2003-2006
Title: | Abundance, biomass and body size of the hydromedusa Aglantha digitale in the western and eastern subarctic Pacific during the summers of 2003-2006 |
Authors: | Saito, Rui Browse this author | Yamaguchi, Atsushi Browse this author →KAKEN DB | Saitoh, Sei-ichi Browse this author →KAKEN DB | Kuma, Kenshi Browse this author →KAKEN DB | Imai, Ichiro Browse this author →KAKEN DB |
Keywords: | Abundance | Bell height | Hydromedusa | Population structure | Subarctic Pacific |
Issue Date: | May-2012 |
Publisher: | Plankton Society of Japan : Japanese Association of Benthology |
Journal Title: | Plankton & benthos research |
Volume: | 7 |
Issue: | 2 |
Start Page: | 96 |
End Page: | 99 |
Abstract: | The aim of this study is to evaluate regional and interannual changes in abundance, biomass and body size of the hydromedusa Aglantha digitale in the subarctic Pacific. A. digitale was sampled by 0–150 m vertical tows using a 100 μm mesh-size NORPAC net at stations from 41°30′N to 49°30′N along the 165°E line (western subarctic Pacific) and from 39°00′N to 53°30′N along the 165°W line (eastern subarctic Pacific) during the summers of 2003–2006. The mean numerical abundances during the course of the study in the west and east were 32.9 (range, 0–368) and 169.2 (0–768) ind. m^-2, respectively, and those of biomass were 26.3 (0–264) and 69.1 (0–418) mg DM m^-2, respectively. The abundance and biomass showed no significant north-south or year-to-year differences within each transect but they were significantly greater in the east in some years. The body size was characterized with the dominance of small-sized individuals in the east. The higher abundance and biomass, and smaller body size in the east were probably due to sampling during or just after their reproduction in the east. |
Rights: | © 2012 Plankton Society of Japan |
Type: | article |
URI: | http://hdl.handle.net/2115/52344 |
Appears in Collections: | 水産科学院・水産科学研究院 (Graduate School of Fisheries Sciences / Faculty of Fisheries Sciences) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 山口 篤
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