| Presentation | 2018-08-30 Study on acoustic scattering characteristics of pointhead flounder (Cleisthenes pinetorum) Tohru Mukai, Naizheng Yan, Jun Yamamoto, Kohei Hasegawa, |
|---|---|
| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | This study addresses the characteristics of the pointhead flounder Cleisthenes pinetorum using a quantitative echosounder in and near Funka Bay, Hokkaido, Japan. Acoustics data of the fish were monitored using a Simrad EK60 (38, 120, 200 kHz) split-beam echo sounder, and biological samples were collected using a rod for the pointhead flounder and a frame-type midwater trawl for the juvenile walleye pollock (The most important prey of pointhead flounder). The pointhead flounder schools presented a patch shaped echo on the echograms and showed strong scattering at all three frequencies, whereas the distribution patterns of the juvenile walleye pollock schools were layered. The volume backscattering strength (SV) of the target schools extracted from the echograms showed that the pointhead flounder presented a higher SV at high frequency, which is consistent with the early surveys of other bladderless fish. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Pointhead flounder / Quantitative echosounder / Juvenile walleye pollock / Volume backscattering strength / acoustic characteristics |
| Paper # | US2018-46 |
| Date of Issue | 2018-08-23 (US) |
| Conference Information | |
| Committee | US |
|---|---|
| Conference Date | 2018/8/30(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Tokyo Institute of Technology |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | Shinichi Takeuchi(Toin Univ. of Yokohama) |
| Vice Chair | Minoru Kurosawa(Tokyo Inst. of Tech.) / Jun Kondo(Shizuoka Univ.) |
| Secretary | Minoru Kurosawa(Univ. of Tokyo) / Jun Kondo(Kanagawa Univ.) |
| Assistant | Daisuke Koyama(Doshisha Univ.) |
| Paper Information | |
| Registration To | Technical Committee on Ultrasonics |
|---|---|
| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Study on acoustic scattering characteristics of pointhead flounder (Cleisthenes pinetorum) |
| Sub Title (in English) | Characteristics of pointhead flounder observed with a quantitative echosounder. |
| Keyword(1) | Pointhead flounder |
| Keyword(2) | Quantitative echosounder |
| Keyword(3) | Juvenile walleye pollock |
| Keyword(4) | Volume backscattering strength |
| Keyword(5) | acoustic characteristics |
| 1st Author's Name | Tohru Mukai |
| 1st Author's Affiliation | Hokkaido University(Hokkaido Univ.) |
| 2nd Author's Name | Naizheng Yan |
| 2nd Author's Affiliation | Hokkaido University(Hokkaido Univ.) |
| 3rd Author's Name | Jun Yamamoto |
| 3rd Author's Affiliation | Hokkaido University(Hokkaido Univ.) |
| 4th Author's Name | Kohei Hasegawa |
| 4th Author's Affiliation | Hokkaido University(Hokkaido Univ.) |
| Date | 2018-08-30 |
| Paper # | US2018-46 |
| Volume (vol) | vol.118 |
| Number (no) | US-199 |
| Page | pp.pp.29-32(US), |
| #Pages | 4 |
| Date of Issue | 2018-08-23 (US) |