Fisheries Resources Institute, Japan Fisheries Research and Education
Agency, Yokohama, 236-8648, Japan
present address: Graduate School of Agriculture and Life Sciences, the University of Tokyo, Tokyo, 113-8657, Japan
Atsushi Nishimoto
Fisheries Technology Institute, Japan Fisheries Research and Education
Agency, Yokohama, 236-8648, Japan
Ken-ichi Nakamura
Fisheries Resources Institute, Japan Fisheries Research and Education
Agency, Niigata, 951-8121, Japan
Misato Nakae
Fisheries Resources Institute, Japan Fisheries Research and Education
Agency, Niigata, 951-8121, Japan
Naoki Iguchi
Fisheries Resources Institute, Japan Fisheries Research and Education
Agency, Niigata, 951-8121, Japan
Yosuke Igeta
Fisheries Resources Institute, Japan Fisheries Research and Education
Agency, Niigata, 951-8121, Japan
Yoichi Kogure
Fisheries Resources Institute, Japan Fisheries Research and Education
Agency, Niigata, 951-8121, Japan
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Carbon and nitrogen are essential elements for organisms; their stable isotope ratios (13C : 12C, 15N : 14N) are useful tools for understanding turnover and movement in the ocean. In the Sea of Japan, the environment is rapidly being altered by human activities. The 13C : 12C of small organic particles is increased by active carbon fixation, and phytoplankton growth increases the values. The 15N : 14N variations suggest that nitrates from many sources contribute to organic production.
Carbon and nitrogen are essential elements for organisms; their stable isotope ratios...
