論文

査読有り
2003年2月

Geographical variations in prosome length and body weight of Neocalanus Copepods in the North Pacific

Journal of Oceanography
  • Toru Kobari
  • ,
  • Kazuaki Tadokoro
  • ,
  • Akihiro Shiomoto
  • ,
  • Shinji Hashimoto

59
1
開始ページ
3
終了ページ
10
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1023/A:1022895802468

Geographical variations in prosome length and body weight of Neocalanus copepods (N. cristatus, N. plumchrus and N. flemingeri) were investigated on samples from North-South and East-West transects in the North Pacific during spring to early summer in 1998 and 1999. Southward and eastward increasing patterns were pronounced for water temperature, although no significant pattern was observed for chlorophyll a concentrations. All Neocalanus species showed large geographical variations in prosome length and body weight, being smaller in the southern and eastern waters. Comparing the relationship between prosome length and body weight, large deviations (lower body weight at a given prosome length) were evident for the eastern specimens of N. cristatus and N. plumchrus. In stepwise regression analysis, the geographical variations of prosome length and body weight revealed a significantly negative correlation with temperature variations. These results suggest that temperature is a more important environmental factor than chlorophyll a concentration in its effect on geographical variations in prosome length and body weight of Neocalanus copepods in the North Pacific.

リンク情報
DOI
https://doi.org/10.1023/A:1022895802468

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