Spatio-temporal variability in life cycle strategy of four pelagic Antarctic copepods: Rhincalanus gigas, Calanoides acutus, Calanus propinquus and Metridia gerlachei
スポンサーリンク
概要
- 論文の詳細を見る
Spatio-temporal variability in life cycle strategy of four pelagic Antarctic copepods, Rhincalanus gigas, Calanoides acutus, Calanus propinquus and Metridia gerlachei was studied, including their copepodite stage composition, using the multiyear samples taken off east Antarctica (90-160°E) in March 1988-1996. Except for R. gigas, the rare occurrence of adults indicated that the spawning activities ceased by mid-March in this research area. Younger copepodite stages appeared for C. propinquus compared to C. acutus, suggesting the late reproduction or slow growth in the former. Multiple regression analysis on the relationship between environmental variables and the copepodite stage composition showed that the population matured earlier in the warmer area for C. acutus, C. propinquus and M. gerlachei. The study demonstrated that the three species flexibly changed timing of the reproduction and development, and shifted their life cycle from one year to two years in the southern Antarctic Circumpolar Current (ACC) area, responding to spatio-temporal environmental change caused by meandering of the ACC.
- 国立極地研究所の論文
著者
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Hosie Graham
Australian Antarctic Division
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Fukuchi Mitsuo
National Institute of Polar Research, 10-3 Midori-cho, Tachikawa-shi, Tokyo 190-8518, Japan
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Hosie Graham
Australian Government Antarctic Division Channel Highway Kingston Tasmania 7050 Australia
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G.w. Hosie
Australian Government Antarctic Division Channel Highway Kingston Tasmania 7050 Australia
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Chiba Sanae
Department Of Ocean Sciences Tokyo University Of Fisheries
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Chiba Sanae
Frontier Research Center For Global Change
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Chiba Sanae
Frontier Research System For Global Change
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Ishimaru Takashi
Tokyo University of Fisheries
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Hosie G
Australian Government Antarctic Division Channel Highway Kingston Tasmania 7050 Australia
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Ishimaru Takashi
Tokyo Univ. Fisheries Tokyo Jpn
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Fukuchi Mitsuo
National Inst. Of Polar Res. Kaga Tokyo 173-8515 Jpn
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Fukuchi Mitsuo
National Inst. Of Polar Res. 10-3 Midori-cho Tachikawa Tokyo 190-8518 Jpn
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- ACKNOWLEDGMENTS
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- PREFACE
- Foreword
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