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Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Fisheries Sciences / Faculty of Fisheries Sciences >
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East-west differences in population structure and vertical distribution of copepods along 47°N in the subarctic Pacific in June 2009
| Title: | East-west differences in population structure and vertical distribution of copepods along 47°N in the subarctic Pacific in June 2009 |
| Authors: | Yamaguchi, Atsushi Browse this author →KAKEN DB | | Homma, Tomoe Browse this author | | Saito, Rui Browse this author | | Matsuno, Kohei Browse this author →KAKEN DB | | Ueno, Hiromichi Browse this author →KAKEN DB | | Hirawake, Toru Browse this author →KAKEN DB | | Imai, Ichiro Browse this author →KAKEN DB |
| Keywords: | Eucalanus | | Lipid accumulation | | Metridia | | Neocalanus | | Ontogenetic vertical distribution |
| Issue Date: | Aug-2013 |
| Publisher: | Plankton Society of Japan : Japanese Association of Benthology |
| Journal Title: | Plankton & benthos research : a joint journal of the Plankton Society of Japan & the Japanese Association of Benthology |
| Volume: | 8 |
| Issue: | 3 |
| Start Page: | 116 |
| End Page: | 123 |
| Publisher DOI: | 10.3800/pbr.8.116 |
| Abstract: | Stratified zooplankton sampling was conducted in the subarctic Pacific in June 2009 at four stations along 47°N from 0 to 3,000 m depth to evaluate longitudinal changes in population structure and vertical distribution of the dominant copepod species. At the westernmost station (160°E), the population structure of Eucalanus bungii and Metridia pacifica was dominated by early copepodid stages. In E. bungii, nauplii were abundant and adult females had developed ovaries at 160°E, while at the three stations to the east (167°E, 174°E and 179°W), no E. bungii nauplii were collected, and the resting stages were dominant. This suggests the species was reproducing near 160°E and in diapause in the east. In all three Neocalanus species analyzed (N. cristatus, N. flemingeri and N. plumchrus), late copepodid stages were dominant at the eastern three stations. Lipid accumulation in the fifth copepodid stage of Neocalanus spp. was greater in the west than in the east. This probably resulted from better food conditions and lower temperatures in the west, where copepods could consume more food during development than in the east. |
| Rights: | © 2013 The Plankton Society of Japan |
| Relation: | http://www.plankton.jp/PBR/index.html |
| Type: | article |
| URI: | http://hdl.handle.net/2115/54055 |
| 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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