2000-2001年の太平洋西部海域におけるプラスチック微小片の分布

Sampling was conducted at 31 sites in the western Pacific Ocean from 2000 to 2001 with the aim of collecting plastic fragments with a neuston net (mesh size: 1.00 mm × 1.64 mm). Small plastic fragments including microplastics (small fragments in the size range of 1.1–41.8 mm) were collected at multiple survey sites. Waters with high densities of small fragments were observed between 20°N and 30°N to the south of Japan and between 20°S and 30°S to the northeast of New Zealand (maxima of 6.63 × 102 and 2.04 × 102 pieces/ha, respectively). These waters are located to the west of the Ekman convergence zones related to trade winds in the subtropical gyres of the North and South Pacific Oceans. Nearly no small plastics were observed in the tropical circulation of the western Pacific Ocean.2000年から2001年にかけて太平洋西部海域の31地点でニューストンネット（目合1.00mm×1.64mm）によるプラスチック微小片の採集を行った。マイクロプラスチック(5mm以下)を含むプラスチック微小片は，日本の南の北緯20—30度の海域とニュージーランド北東の南緯20—30度の海域で高密度に採集され（各々最高で6.63×102と2.04×102個/ha），これらの海域は北太平洋と南太平洋における亜熱帯循環内の漂流物収束帯の西端に位置する。赤道付近の熱帯循環内の採集点ではほとんど採集されなかった

Current structure observed in the central equatorial Pacific Ocean

東京水産大学環境システム学講座東京水産大学海鷹丸東京水産大学海鷹丸東京水産大学海鷹丸東京水産大学海鷹丸東京水産大学環境システム学講座東京水産大学海鷹

Long-Term Voyages and Bone Mass Among Seamen

東京水産大学海洋生産学専攻東京水産大学練習船海鷹丸東京水産大学練習船神鷹丸東京水産大学練習船海鷹丸東京水産大学練習船海鷹丸東京水産大学練習船神鷹丸東京水産大学練習船神鷹丸東京水産大学練習船海鷹丸東京水産大学練習船神鷹丸東京水産大学海洋生産学科東京水産大学海洋生産学

A multilevel dataset of microplastic abundance in the world’s upper ocean and the Laurentian Great Lakes

A total of 8218 pelagic microplastic samples from the world’s oceans were synthesized to create a dataset composed of raw, calibrated, processed, and gridded data which are made available to the public. The raw microplastic abundance data were obtained by different research projects using surface net tows or continuous seawater intake. Fibrous microplastics were removed from the calibrated dataset. Microplastic abundance which fluctuates due to vertical mixing under different oceanic conditions was standardized. An optimum interpolation method was used to create the gridded data; in total, there were 24.4 trillion pieces (8.2 × 104 ~ 57.8 × 104 tons) of microplastics in the world’s upper oceans

A study on health control for cadets in sea training 1. : body composition and blood circulation among cadets in sea training

東京水産大学海洋システム工学講座東京水産大学水産資源経営講座東京水産大学練習船海鷹丸東京水産大学練習船海鷹丸東京水産大学練習船海鷹丸東京水産大学練習船海鷹丸東京水産大学練習船海鷹丸東京水産大学練習船青鷹丸東京水産大学練習船青鷹丸東京水産大学名誉教