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Last Updated :2024/07/25

Researcher Profile and Settings

Master

Affiliation (Master)

  • School of Fisheries Sciences　Training Ship “Oshoro-maru”

Affiliation (Master)

  • School of Fisheries Sciences　Training Ship “Oshoro-maru”

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Profile and Settings

Profile and Settings

  • Name (Japanese)

    HOSHI

  • Name (Kana)

    Naoki

  • Name

    201301085090452190

Achievement

Research Areas

  • Aerospace, marine, and maritime Engineering / Marine and maritime engineering

Research Experience

  • - 2009/03 Fisheries Agency(Chartered ) Fisheries Inspection vessel Capitan

Education

  • 1999/04 - 2000/03  Hokkaido University  School of Fisheries Sciences  advanced courses
  • 1993/04 - 1999/03  Hokkaido University  School of Fisheries Sciences

Published Papers

  • Mozammal Hoque, Kimitaka Kawamura, Osamu Seki, Naoki Hoshi
    MARINE CHEMISTRY 172 1 - 11 0304-4203 2015/05 [Refereed][Not invited]
     
    To better understand the sources and atmospheric processing of organic aerosols in the remote marine atmosphere, aerosol (TSP) samples were collected over the North Pacific (13 degrees 14'N-53 degrees 37'N and 140 degrees 46'E-179 degrees 54' W) in May-July, 2010 during a cruise of T/V Oshoro Maru, and studied for dicarboxylic acids (C-2-C-11), omega-oxoacids, pyruvic acid and alpha-dicarbonyls as well as organic and elemental carbon, water-soluble organic carbon and total nitrogen. Over the North Pacific, diacids are most abundant followed by omega-oxoacids and alpha-dicarbonyls. Although the molecular compositions of diacids are generally characterized by the predominance of oxalic (C-2) acid, we found a predominance of succinic (C-4) acid in four samples, which were collected in the central northern North Pacific. We consider that photochemical degradation of unsaturated fatty adds emitted from the ocean surface is the main source of C-4 over the central northern North Pacific, where Chlorophyll-a maximized during the cruise. Moreover, seven samples collected in the central northern North and western North Pacific shows predominance of malonic (C-3) acid over C-4, suggesting the photochemical degradation of C-4 to C-3. Spatial distributions of diacids, omega-oxoacids and alpha-dicarbonyls together with total carbon and water soluble total nitrogen contents showed higher abundances in the coastal western North Pacific followed by the central northern North and subtropical Pacific, signifying that continental aerosols are transported long distances to the remote marine atmosphere. (C) 2015 Elsevier B.V. All rights reserved.
  • Keiko Sekiguchi, Hiroji Onishi, Hiroko Sasaki, Shota Haba, Yuka Iwahara, Daisuke Mizuguchi, Mayuko Otsuki, Daisuke Saijo, Bungo Nishizawa, Hirona Mizuno, Naoki Hoshi, Takehiko Kamito
    MARINE MAMMAL SCIENCE 30 (3) 1199 - 1209 0824-0469 2014/07 [Refereed][Not invited]
  • K. Muramatsu, J. Yamamoto, T. Abe, K. Sekiguchi, N. Hoshi, Y. Sakurai
    MARINE BIOLOGY 160 (5) 1171 - 1175 0025-3162 2013/05 [Refereed][Not invited]
     
    Using powerful jet propulsion, some squid species are able to exit the water and become airborne; this is a common behavior seen throughout the world's oceans. However, direct scientific observation is rare, with most studies relying on anecdotal evidence and limited photographic documentation. Here, we examine the flying behavior of young oceanic squid (Ommastrephidae) observed in sequential photographs taken in the Northwest Pacific (35(o)34.0'N, 146(o)19.3'E) on July 25, 2011. We define four phases in the flight process: launching, jetting, gliding and diving. During flight, squid actively change their aerial posture and attitude depending on the flight phase and their distance from the water. The present study demonstrated that flight of squid is not simple gliding after incidental exit from the water, but involves jet propulsion, generation of lift force and control of different body postures in different flight phases, which have evolved to enhance escape from predators.
  • K. Muramatsu, J. Yamamoto, T. Abe, K. Sekiguchi, N. Hoshi, Y. Sakurai
    MARINE BIOLOGY 160 (5) 1171 - 1175 0025-3162 2013/05 [Refereed][Not invited]
     
    Using powerful jet propulsion, some squid species are able to exit the water and become airborne; this is a common behavior seen throughout the world's oceans. However, direct scientific observation is rare, with most studies relying on anecdotal evidence and limited photographic documentation. Here, we examine the flying behavior of young oceanic squid (Ommastrephidae) observed in sequential photographs taken in the Northwest Pacific (35(o)34.0'N, 146(o)19.3'E) on July 25, 2011. We define four phases in the flight process: launching, jetting, gliding and diving. During flight, squid actively change their aerial posture and attitude depending on the flight phase and their distance from the water. The present study demonstrated that flight of squid is not simple gliding after incidental exit from the water, but involves jet propulsion, generation of lift force and control of different body postures in different flight phases, which have evolved to enhance escape from predators.

MISC

Presentations

  • 「海」はmer 「母」はmère  [Not invited]
    ジュネーブ日本語補習学校 オンライン講演  2021/06
  • スルメイカの生態と解剖
    五島市玉野浦町産業祭  2020/12
  • 『僕等はどれだけ「海」を知っているだろうか？』  [Invited]
    マリンチャレンジプログラム2019 北海道・東北大会 〜海と日本PROJECT〜 主 催：公益財団法人日本財団、一般社団法人日本先端科学技術教育人材研究開発機構、株 式会社リバネス  2019/07
  • 「空飛ぶ烏賊（イカ）は鳥類（トリ）ですか？」  [Not invited]
    雑草と里山の科学談笑会（宇都宮大学 雑草と里山の科学教育研究センター）  2019/02
  • 「書を捨てよ 海へ出よう ～洋上のキャンパス“おしょろ丸”とともに～」  [Not invited]
    星直樹, 藤田良治
    第80回サイエンス・カフェ札幌（科学技術コミュニケーション教育研究部門 CoSTEP）  2015/01
  • 「おしょろ丸での航海の生活について」  [Invited]
    文部科学省の「新水産・海洋都市はこだてを支える人材養成」産学官民連携の地域課題解決型「海のナビゲーター」と「海のプロデューサー」の人材養成プログラム  2014/01

Teaching Experience

  • Introduction to OceanographyIntroduction to Oceanography Hokkaido University
  • Boarding trainingBoarding training Hokkaido University

Association Memberships

  • Japanese Association of First-Year Experience at Universities and Colleges   Japan Institute of Navigation   

Works

Research Projects

  • Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)
    Date (from‐to) : 2013/04 -2016/03 
    Author : Takatsu Tetsuya, HOSHI NAOKI, NAKAYA MITSUHIRO, ISODA YUTAKA, INAGAKI YUTA, KANO YOTA, NAKATANI TOSHIKUNI, SUZUKI KOTA, TAMURA JUN'ICHI
     
    To clarify the occurrence mechanism of strong-year classes in flathead flounder Hippoglossoides dubius, transport process of pelagic larvae and juveniles and settled area of juveniles were investigated in Funka Bay and its vicinity in 2013-2015 FY. In May 2013, late pelagic stage larvae were collected with MOHT- and FMT-nets around the area off Muroran City located at the north-east end of the bay, but no larva was collected in 2014-2015. It might be important for the recruitment success in the 2013 year-class that the clockwise vortex off Muroran captured the larvae was retained by the predominantly northwesterly winds. In this vortex, suitable water temperature (4.1-5.6 degrees Celsius) and prey abundance were observed for larval growth. In contrast in August-December through 2013-2015, no settled juvenile was collected on the sea floor with an otter trawl net in and out of the bay with <98-m and 95-354-m bottom depths, respectively.

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