論文 - 甘糟　和男

Association of density and sound-speed contrast with maturity stage of Antarctic krill in the eastern Indian sector of the Southern Ocean

R. Matsukura, H. Doiguchi, N. Yamamoto, K. Abe, K. Amakasu, Y. Fukuda, K. Hasegawa, T. Mukai, and H. Murase , 2024年09月

Fisheries Science

Biomass of Antarctic krill (Euphausia superba) in the eastern Indian sector of the Southern Ocean (80–150°E) in the 2018–19 austral summer

K. Abe, R. Matsukura, N. Yamamoto, K. Amakasu, R. Nagata, and H. Murase , 2023年09月

Progress in Oceanography , 218 , 103107

Volume backscattering spectra measurements of Antarctic krill using a broadband echosounder

N. Yamamoto, K. Amakasu, K. Abe, R. Matsukura, T. Imaizumi, T. Matsuura, and H. Murase , 2023年05月

Fisheries Science , 89 (3) , 301 - 315

Effects of fast Fourier transform window size on the target strength spectra of tungsten carbide spheres

J. Liu, B. Saygili, A. Iwasa, N. Yamamoto, T. Imaizumi, and K. Amakasu , 2023年03月

Fisheries Science , 89 (2) , 147 - 157

Estimated ammonium regeneration potentials of two common euphausiid species (Euphausia superba and E. crystallorophias) off Adélie Land, East Antarctica, in austral summer, 2008

A. Ono, F. Hashihama, K. Amakasu, and M. Moteki , 2022年09月

Polar Biology , 45 (9) , 1523 - 1528

Annual variation of oceanographic conditions changed migration timing of bowhead whales Balaena mysticetus in the southern Chukchi Sea

K. Tsujii, M. Otsuki, T. Akamatsu, K. Amakasu, M. Kitamura, T. Kikuchi, A. Fujiwara, H. Shirakawa, K. Miyashita, Y. Mitani , 2021年11月

Polar Biology , 44 (12) , 2289 - 2298

A broadband target strength measurement method for weakly scattering animals using a 50-ms-long linear frequency modulated signal in a small tank

B. Saygili, S. Tsuyuki, J. Liu, N. Yamamoto, K. Kobayashi, and K. Amakasu , 2021年09月

Fisheries Science , 87 (5) , 627 - 638

Possible fluid discharge associated with faults observed by a high-resolution dense-2D seismic reflection survey in Uchiura Bay off Numazu, Japan

T. Tsuru, J-O. Park, K. Amakasu, T. No, K. Arai, T. Inoue, S. Furuyama, K. Uchida, and Y. Nakamura , 2020年08月

Earth, Planets and Space , 72 , 121

A new seismic survey technology using underwater speaker detected a low‑velocity zone near the seafloor: an implication of methane gas accumulation in Tokyo Bay

T. Tsuru, K. Amakasu, J. Park, J. Sakakibara, and M. Takanashi , 2019年03月

Earth, Planets and Space , 71 , 31

An environment-friendly MCS survey by using underwater speakers in Tokyo Bay

T. Tsuru, J. Park, M. Takanashi, K. Arai, T. Inoue, S. Furuyama, K. Amakasu, K. Takao, M. Ogawa, and S. Shimizu , 2018年11月

Proceedings of the 13th SEGJ International Symposium, 2018

Proposal to use fish-length-to-wavelength ratio characteristics of backscatter from fish for species identification

M. Furusawa and K. Amakasu , 2018年10月

The Journal of the Marine Acoustics Society of Japan , 45 (4) , 183 - 196

Distributions of larval and juvenile/adult stages of the Antarctic myctophid fish, Electrona antarctica, off Wilkes Land in East Antarctica

M. Moteki, K. Fujii, K. Amakasu, K. Shimada, A. Tanimura, and T. Odate , 2017年10月

Polar Science , 12 , 99 - 108

Measurement of the volume-backscattering spectrum of an Antarctic krill aggregation using a broadband signal and inference of length-density distribution

K. Amakasu, T. Mukai, and M.Moteki , 2017年10月

Polar Science , 12 , 79 - 87

Seasonal dynamics of zooplankton in the southern Chukchi Sea revealed from acoustic backscattering strength

M. Kitamura, K. Amakasu, T. Kikuchi, and S. Nishino , 2017年10月

Continental Shelf Research , 133 , 47 - 58

GPSプロッタ魚群探知機に取り付ける簡易型音響資源調査システムの試作

宮本佳則, 内田圭一, 甘糟和男, 長谷川浩平, Y. Theparoonart, M. Anongponyoskun, 石川智士, Y. Minlee, 笹倉豊喜 , 2016年09月

海洋音響学会誌 , 43 (2) , 71 - 78

The timing of migration of fin whales monitored by passive acoustic methods in the southern Chukchi Sea

K. Tsujii, M. Otsuki, T. Akamatsu, I. Matsuo, K. Amakasu, M. Kitamura, T. Kikuchi, K. Miyashita, and Y. Mitani , 2016年09月

ICES Journal of Marine Science , 73 (8) , 2085 - 2092

Estimation of target strength of Sardina pilchardus and Sardinella aurita by theoretical approach

S. El Ayoubi, K. Mamza, T. Fujino, K. Abe, K. Amakasu, and K. Miyashita , 2016年09月

Fisheries Science , 82 (3) , 417 - 423

Strong turbulent mixing induced by internal bores interacting with internal tide-driven vertically-sheared flow

E. Masunaga, O. B. Fringer, H. Yamazaki, and K. Amakasu , 2016年09月

Geophysical Research Letters , 43 (5) , 2094 - 2101

Computer simulation of broadband single-target echo waveforms and its application

K. Amakasu , 2014年09月

The Journal of the Marine Acoustics Society of Japan , 41 (4) , 183 - 190

電池推進船と内燃機関船の水中音の比較

西村真佐人, 清水悦郎, 甘糟和男, 杜　宇航, 大出　剛, 賞雅寛而 , 2013年09月

日本マリンエンジニアリング学会誌 , 48 (4) , 560 - 565