YAN NAIZHENG
School of Fisheries Sciences | Specially Appointed Assistant Professor |
Last Updated :2025/01/11
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Career
Educational Background
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Awards
- Nov. 2024, Asian Fisheries Acoustics Society, Young Fisheries Acoustician Award
Broadband target strength of Japanese flying squid(Todarodes pacificus) - Nov. 2022, Asian Fisheries Acoustics Society, Young Fisheries Acoustician Award
Broadband target strength measurements of juvenile walleye pollock
International society, Korea, Republic of, 40685659 - Nov. 2021, Asian Fisheries Acoustics Society, Young Fisheries Acoustician Award
Broadband Target Strength Measurements of Three Bladderless Fishes
International society, 35769213 - Mar. 2021, 北海道大学, 北海道大学大塚賞
- Mar. 2021, 北海道大学大学院水産科学院, ジョンカッター賞
Papers
- Impact of anticyclonic eddy on fish distribution in the Kuroshio‒Oyashio transition area
土橋 稜, 上野 洋路, 加藤 陸, 閻 乃筝, 向井 徹, 安間 洋樹, 野村 大樹, 伊藤 幸彦, 笠井 亮秀
水産海洋研究, 88, 3, 178, 189, Aug. 2024, [Peer-reviewed]
Japanese, Scientific journal - Broadband target strength of arabesque greenling, Pacific sand lance, and pointhead flounder
Naizheng Yan, Tohru Mukai, Kohei Hasegawa, Jun Yamamoto, Yoshiaki Fukuda
ICES Journal of Marine Science, 22 Jan. 2024, [Peer-reviewed], [Lead author, Corresponding author]
Scientific journal - 計量ソナーに用いるマサバのターゲットストレングスの計測と理論モデル解析
閻 乃筝, 向井 徹, 長谷川浩平, 飯田浩二, 鶴田直剛
海洋音響学会誌, 50, 4, 107, 122, Oct. 2023, [Peer-reviewed], [Lead author, Corresponding author]
Japanese, Scientific journal - In situ broadband acoustic measurements of age-0 walleye pollock and pointhead flounder in Funka Bay, Hokkaido, Japan
Kohei Hasegawa, Naizheng Yan, Tohru Mukai
Journal of Marine Science and Technology, 29, 2, 135, 145, National Taiwan Ocean University, 21 May 2021, [Peer-reviewed], [International Magazine]
Scientific journal, Measurements of the broadband acoustic backscattering from fish should improve acoustic discrimination between species. The pulse compression processing of broadband systems can be used tomeasure acoustic backscattering with high range resolution and improve signal-to-noise ratio. This may increase opportunities for in situ target strength (TS) measurements, the preferredmethod of collecting TS data. To evaluate the availability of TS spectra for acoustic discrimination, three Simrad EK80 wideband transceivers and split-beam transducers of 70, 120, and 200 kHz were used to collect in situ frequency responses of TS from age-0 juvenile walleye pollock and pointhead flounder, a swim-bladderless flat-fish, distributed in and around Funka Bay, Hokkaido, Japan. The single echoes were extracted frombackscattering data, and the TS spectra of the two species were obtained. However, processing of the broadband acoustic data is under discussion. To ensure the reliability of our data, the TS spectra of standard targets were also calculated. The measured TS spectra of the standard targets were close to the theoretical TS spectra. The individual TS spectra of two species included complex frequency response; however, the mean TS spectrum was relatively stable. The different characteristics of the frequency responses observed for the two species were in good agreement with reported observations. The results available for the acoustic discrimination were similar to the multi-frequencymethod, which uses two or more single frequencies. The rawTS spectra should aid in not only discriminating between species but also estimating the size of the fish. - Acoustic discrimination between juvenile walleye pollock and pointhead flounder
Naizheng Yan, Tohru Mukai, Jun Yamamoto, Kohei Hasegawa
Fisheries Research, 224, 105434, 105434, Elsevier BV, Apr. 2020, [Peer-reviewed], [Lead author], [International Magazine]
Scientific journal
Other Activities and Achievements
- 計量ソナーに用いるマサバの3次元ターゲットストレングス
閻乃筝, 向井徹, 長谷川浩平, 飯田浩二, 鶴田直剛, 日本水産学会大会講演要旨集(CD-ROM), 2024, 2024 - 懸垂法を用いたサケ稚魚の広帯域腹方向ターゲットストレングス特性について
楊睿通, 閻乃筝, 長谷川浩平, 向井徹, 太田倫太郎, 岡部聖, 清水勇一, 日本水産学会大会講演要旨集(CD-ROM), 2024, 2024 - 音響プロファイラーで観測した噴火湾砂原沖の生物と海洋環境との関係性について
櫻井海晟, 長谷川浩平, 閻乃筝, 向井徹, 東一彦, 日本水産学会大会講演要旨集(CD-ROM), 2024, 2024 - Broadband target strength characteristics of Pacific herring (Clupea pallasii) and Pacific chub mackerel (Scomber japonicus) by a tether method
WANG Zi, YAN Naizheng, 長谷川浩平, 向井徹, 山本潤, 海洋音響学会研究発表会講演論文集, 2024, 2024 - Broadband target strength of Japanese flying squid
YAN Naizheng, 向井徹, 長谷川浩平, 工藤尚之, 大西由利子, 笠井昭範, 西山義浩, 山本潤, 海洋音響学会研究発表会講演論文集, 2024, 2024 - The effect of sediment on backscattering intensity from sea bottom obtained by multi-beam sonar and quantitative echosounder in Funka bay and Hakodate bay
大谷寛礼, 長谷川浩平, YAN Naizheng, 向井徹, 海洋音響学会研究発表会講演論文集, 2024, 2024 - Interference by sea surface reverberations in measuring surface fish by scanning sonar
小林徳海, 高橋竜三, 澤田浩一, 福田美亮, 向井徹, YAN Naizheng, 長谷川浩平, 巣山哲, 海洋音響学会研究発表会講演論文集, 2024, 2024 - スケトウダラ稚魚の広帯域ターゲットストレングス特性
閻 乃筝, 向井 徹, 長谷川浩平, 山本 潤, 海洋音響学会2023年度研究発表会講演論文集, 7, 10, May 2023 - スケトウダラ稚魚のターゲットストレングスの体長依存性および周波数特性
閻乃箏, 向井徹, 長谷川浩平, 山本潤, 日本水産学会大会講演要旨集(CD-ROM), 2023, 2023 - 懸垂法を用いたマサバの広帯域ターゲットストレングス特性
王梓, 閻乃箏, 長谷川浩平, 向井徹, 日本水産学会大会講演要旨集(CD-ROM), 2023, 2023 - 北海道噴火湾周辺海域に生息するカイアシ類,オキアミ類,タンキャク類とスケトウダラ稚魚の周波数特性
段ぎょく, 長谷川浩平, 閻乃箏, 向井徹, 日本水産学会大会講演要旨集(CD-ROM), 2023, 2023 - 多周波数音響プロファイラーを用いた噴火湾砂原沖の魚群観測
長谷川浩平, 向井徹, 閻乃箏, 東一彦, 日本水産学会大会講演要旨集(CD-ROM), 2023, 2023 - 計量魚群探知機による琵琶湖固有種アナンデールヨコエビの分布調査
藤田航生, 石川可奈子, 永田貴丸, 閻乃箏, 長谷川浩平, 向井徹, 日本水産学会大会講演要旨集(CD-ROM), 2023, 2023 - Bottom classification from backscattering data collected by quantitative echosounders in Funka Bay, Hokkaido
大谷寛礼, 向井徹, 長谷川浩平, YAN Naizheng, 海洋音響学会研究発表会講演論文集, 2023, 2023 - 自由遊泳法によるソウハチとホッケの広帯域ターゲットストレングス測定
閻 乃筝, 向井 徹, 長谷川 浩平, 福田 美亮, 山本 潤, May 2022, [Lead author, Corresponding author] - Wideband target strength characteristics of bladderless fishes with different body shapes
YAN Naizheng, 向井徹, 長谷川浩平, 山本潤, 福田美亮, 海洋音響学会研究発表会講演論文集, 2021, May 2021 - 全周ソナーを用いた北海道釧路沖におけるサバ類・マイワシの魚群形状の測定
川添祐斗, 長谷川浩平, 福田美亮, 閻乃筝, 向井徹, 山口浩志, 守田航大, 日本水産学会大会講演要旨集(CD-ROM), 2021, 2021 - 動物プランクトンのTS推定に必要な形状パラメータの自動計測
斉書豪, 福田美亮, 長谷川浩平, 閻乃筝, 向井徹, 日本水産学会大会講演要旨集(CD-ROM), 2021, 2021 - Broadband side-aspect target strength of Japanese jack mackerel and chub mackerel
池田大典, 長谷川浩平, 向井徹, 福田美亮, YAN Naizheng, 海洋音響学会研究発表会講演論文集, 2021, 2021 - 計量魚群探知機を用いた海底底質判別手法の検討
藤貫雅礼, 向井徹, 長谷川浩平, 福田美亮, 閻乃筝, 日本水産学会大会講演要旨集(CD-ROM), 2021, 2021 - 懸垂法による無鰾魚の広帯域ターゲットストレングス測定
閻 乃筝, 向井 徹, 長谷川浩平, 山本 潤, 工藤尚之, 海洋音響学会2018年度研究発表会講演論文集, 65, 66, May 2019 - Study on acoustic scattering characteristics of pointhead flounder Cleisthenes pinetorum : Target strength measurements of pointhead flounder using a broadband acoustic system
閻 乃筝, 向井 徹, 山本 潤, 工藤 尚之, 長谷川 浩平, IEICE technical report, 118, 199, 33, 36, Aug. 2018
電子情報通信学会, Japanese - Study on acoustic scattering characteristics of pointhead flounder Cleisthenes pinetorum : Characteristics of pointhead flounder observed with a quantitative echosounder
向井 徹, 閻 乃筝, 山本 潤, 長谷川 浩平, IEICE technical report, 118, 199, 29, 32, Aug. 2018 - 海水水槽におけるソウハチのsemi-in situターゲットストレングス測定と遊泳姿勢の観察
閻 乃筝, 向井 徹, 山本 潤, 高原英生, 海洋音響学会2018年度研究発表会講演論文集, 49, 52, May 2018 - Acoustic Distinction Between Pointhead Flounder and Juvenile Walleye Pollock by Echo Shape and Frequency Characteristics
Naizheng Yan, Tohru Mukai, Jun Yamamoto, 2018 OCEANS - MTS/IEEE Kobe Techno-Oceans (OTO), May 2018
This study addresses the methods for distinguishing the pointhead flounder Cleisthenes pinetorum from the juvenile walleye pollock Gadus chalcogrammus in and near Funka Bay, Hokkaido, Japan. Acoustics data of th Gadus chalcogrammus e 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 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. In contrast, the juvenile walleye pollock showed higher SV at low frequency, which also agreed with the early surveys., IEEE, English
Lectures, oral presentations, etc.
- スルメイカの広帯域ターゲットストレングス
閻乃筝, 向井徹, 長谷川浩平, 工藤尚之, 大西由利子, 笠井昭範, 西山義浩, 山本潤
海洋音響学会2024年度研究発表会, 13 Jun. 2024 - 計量ソナーに用いるマサバの3次元ターゲットストレングス
閻乃筝, 向井徹, 長谷川浩平, 飯田浩二, 鶴田直剛
日本水産学会春季大会, 28 Mar. 2024 - Target strength of Jesogammarus annandalei, an endemic amphipod in Lake Biwa
Naizheng Yan, Tohru Mukai, Kouichi Sawada, Kanako Ishikawa
The Sixteenth Annual Meeting of Asian Fisheries Acoustics Society, 14 Nov. 2023, English, Oral presentation - スケトウダラ稚魚の 広帯域ターゲットストレングス特性
閻 乃筝, 向井 徹, 長谷川浩平, 山本 潤
海洋音響学会2023年度研究発表会, 25 May 2023 - スケトウダラ稚魚のターゲットストレングスの体長依存性および周波数特性
閻 乃筝, 向井 徹, 長谷川浩平, 山本 潤
令和5年度日本水産学会春季大会, 29 Mar. 2023 - Broadband target strength measurements of juvenile walleye pollock
Naizheng YAN, Tohru MUKAI, Kohei HASEGAWA, Jun YAMAMOTO
The Fifteenth Annual Meeting of Asian Fisheries Acoustics Society, 15 Nov. 2022, English, Oral presentation
14 Nov. 2022 - 16 Nov. 2022, 40685659 - 自由遊泳法によるソウハチとホッケの広帯域ターゲットストレングス測定
閻 乃筝, 向井 徹, 長谷川 浩平, 福田 美亮, 山本 潤
海洋音響学会2022年度研究発表会, 26 May 2022, Oral presentation - Broadband target strength measurements of three bladderless fishes
Naizheng Yan, Tohru Mukai, Kohei Hasegawa, Jun Yamamoto, Yoshiaki Fukuda
The Fourteenth Annual Meeting of Asian Fisheries Acoustics Society( AFAS2021), 01 Nov. 2021, IPB University, Bogor Indonesia, English, Oral presentation
01 Nov. 2021 - 02 Nov. 2021, Bogor, Indonesia(Online), Indonesia, 35769213, [International presentation] - 体形の異なる無鰾魚の広帯域ターゲットストレングス特性
海洋音響学会2021年度研究発表会, May 2021, Oral presentation - 体形状の異なる無鰾魚の音響散乱特性の検討
令和2年度日本水産学会春季大会, Mar. 2020, Oral presentation - Acoustic characteristics of three bladderless fishes
178th Meeting of the Acoustical Society of America, Dec. 2019 - 懸垂法による無鰾魚の広帯域ターゲットストレングス測定
海洋音響学会2019年度研究発表会, May 2019 - Study on acoustic characteristics of pointhead flounder and juvenile walleye pollock
176th Meeting of the Acoustical Society of America, Nov. 2018, Oral presentation - Broadband target strength measurements of pointhead flounder, a flatfish without a swim bladder
The 12th Annual Meeting of Asian Fisheries Acoustic Society, Nov. 2018, Oral presentation - 海水水槽におけるソウハチのsemi-in situターゲットストレングス測定と遊泳姿勢の観察
海洋音響学会2018年度研究発表会, May 2018, Oral presentation - Acoustics distinction between pointhead flounder and juvenile walleye pollock by echo shape and frequency characteristics
OCEANS’18 MTS/IEEE Kobe / Techno-Ocean 2018, May 2018, Poster presentation - ソウハチの音響散乱特性に関する研究 ―II.広帯域音響システムによるソウハチのターゲットストレングス測定―
超音波研究会, May 2018, Oral presentation - 無鰾魚であるソウハチのin situターゲットストレングス測定
平成30年度日本水産学会春季大会, Mar. 2018, Oral presentation - Acoustics distinction between pointhead flounder and juvenile walleye pollock using a quantitative echo-sounder in and near Funka Bay, Hokkaido, Japan
The 11th Annual Meeting of Asian Fisheries Acoustic Society, Nov. 2017, Oral presentation - 計量魚群探知機を用いた噴火湾周辺海域におけるソウハチとスケトウダラ稚魚の調査‐ソウハチのターゲットストレングス測定‐
平成29年度日本水産学会春季大会, Mar. 2017, Oral presentation - Studies on pointhead flounder and juvenile walleye pollock using a quantitative echo-sounder in and near Funka Bay, Hokkaido, Japan
The international conference on underwater acoustics for sustainable fisheries in Aisa, Nov. 2016, Poster presentation - 1. 計量魚群探知機を用いた噴火湾周辺海域におけるソウハチとスケトウダラ稚魚の調査‐エコーグラムにおける特徴‐
平成28年度日本水産学会北海道‐東北合同支部大会, Oct. 2016, Oral presentation