@article{oai:nipr.repo.nii.ac.jp:00010117,
 author = {Takahashi, Kunio T. and Kawaguchi, So and Hosie, Graham W. and Toda, Tatsuki and Naganobu, Mikio and Fukuchi, Mitsuo and Takahashi, Kunio T. and Kawaguchi, So and Hosie, Graham W. and Toda, Tatsuki and Naganobu, Mikio and Fukuchi, Mitsuo},
 issue = {4},
 journal = {Polar science, Polar science},
 month = {Jan},
 note = {We investigated the composition, distribution, and abundance of zooplankton in the Drake Passage in February 2000 using a Continuous Plankton Recorder. Zooplankton abundance varied considerably, between 1 and 1537 individuals/segment (where a segment is 5 nautical miles of surface towing) (mean ± SD = 121.3 ± 200.9). The highest abundances were recorded in the vicinity of the Polar Front (PF). Abundances increased at low latitudes north of the Sub-Antarctic Front (SAF) and decreased northward. A positive correlation was observed between zooplankton abundance and chlorophyll a concentration, reflecting the higher abundance of zooplankton north of the SAF, where higher abundances of phytoplankton were also observed. A total of 21 species/taxa of zooplankton were classified. Small calanoid copepods were found throughout the transect and accounted for 57.5% of total zooplankton abundance, followed by the Cyclopoid copepods Oithona spp. (25.9%) and Calanus simillimus (8.4%). The results of cluster analyses reveal that small calanoid copepods were the most important contributors to the high zooplankton abundance around the PF and north of the SAF in the Drake Passage. We suggest that a change in species composition has occurred since Hardy's descriptions in 1927, from abundant larger copepods and chaetognaths to smaller copepods and other species., 2000年2月にドレーク海峡を縦断する航路において連続プランクトン採集器（CPR）を曳航した。表層動物プランクトン群集の現存量は極前線域および亜南極前線より低緯度海域で増加した。動物プランクトンは21のカテゴリーに分類され、もっとも卓越して出現したのはカラヌス目の小型カイアシ類（例えばCtenocalanus属や Clausocalanus属）で全体の57.5％を占めていた。続いてキクロプス目の小型カイアシ類であるOithona属が25.9％であった。クラスター解析の結果、小型のカラヌス目カイアシ類が本海域における現存量の増減に大きく貢献していることが明らかとなった。また1927年の英国ディスカバリー号航海において同海域で曳航されたCPRデータとの比較から、表層動物プランクトン群集の優占種が大型のカイアシ類やヤムシ類から小型カイアシ類に変化している可能性を示唆した。},
 pages = {235--245},
 title = {Surface zooplankton distribution in the Drake Passage recorded by Continuous Plankton Recorder (CPR) in late austral summer of 2000},
 volume = {3},
 year = {2010}
}