Interspecies relationships among seedlings released into tidal flats -aiming comprehensive management of stock enhancement-

• Project/Area Number: 24658173
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: General fisheries
• Research Institution: Nagasaki University
• Principal Investigator: SAKAKURA Yoshitaka 長崎大学, 水産・環境科学総合研究科(水産), 教授 (20325682)
• Co-Investigator(Kenkyū-buntansha): SAKIYAMA Kazutaka 国立研究開発法人水産総合研究センター, 瀬戸内海区水産研究所, グループ長 (90426312)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000); Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2013: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2012: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
• Keywords: 栽培漁業 / トラフグ / クルマエビ / アサリ / 塩分 / 水産学 / 種苗放流 / 行動学

Outline of Final Research Achievements

Hatchery-reared short-neck clam (Ruditapes philippinarum), kuruma prawn (Marsupenaeus japonicus) and tiger puffer juveniles (Takifugu rubripes) are released into the same tidal flat, however, they can be in predator-prey relationship at the nursery area. However, it is unclear whether predator-prey relationship occur among these seedlings. We examined Exp.1) feeding habits of puffer juveniles in the wild and release-experiment of these 3 species into a mesocosm, and Exp.2) size-related predator-prey relationship between 2 species among above 3 species. Exp.1) Tiger puffer juveniles (40 mm) mainly preyed on crustaceans in the wild. In the mesocosm, small short-neck clam (3.2 mm shell-length) greatly decreased when 3 species co-existed. Exp.2) Tiger puffer (40-100 mm) preyed on both kuruma prawn (20-118% of puffer’s SL) selectively than short-neck clam (about 3 mm). Kuruma prawn (23.1-141.2 mm BL) preyed on short-neck clam (1.6-10.4 mm shell-length).

Research Products

• [Journal Article] トラフグ人工種苗の成長に伴う行動と食性の変化 (2015)
  • Author(s): 山根 晃・吉田 歩・山崎英樹・崎山一孝・河端雄毅・阪倉良孝
  • Journal Title: 水産増殖 Volume: 63
  • NAID: 130005157558
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Effects of aeration rate and salinity gradient on the survival and growth in the early life stages of the devil stinger Inimicus japonicus. (2014)
  • Author(s): Sakakura, Y., Andou, Y., Tomioka, C., Yogo, S., Kadomura, K., Miyaki, K. & Hagiwara, A
  • Journal Title: Aquaculture Science Volume: 62 Pages: 99-105
  • NAID: 130005062549
  • Peer Reviewed / Acknowledgement Compliant
• [Presentation] Predator-prey Relationship Among 3 Species (Tiger Puffer, Kuruma Prawn, Short-Neck Clam) for Stock Enhancement Program at Tidal Flat in Japan (2014)
  • Author(s): Yoshida, A., Yamane, H., Yamazaki, H., Itou, A., Sakiyama, K., Sakakura, Y
  • Organizer: 11th Korea-Japan, Japan-Korea Joint Symposium for Aquaculture
  • Place of Presentation: 群山大学校（韓国・群山市）
  • Year and Date: 2014-10-31 – 2014-11-01
• [Presentation] Evaluation of Fish Quality for Release in the Hatchery-Reared Tiger Puffer Juveniles (2014)
  • Author(s): Sakakura, Y., Yamane, H. Yamazaki, H., Sakiyama, K
  • Organizer: 11th Korea-Japan, Japan-Korea Joint Symposium for Aquaculture
  • Place of Presentation: 群山大学校（韓国・群山市）
  • Year and Date: 2014-10-31 – 2014-11-01
• [Presentation] クルマエビが捕食する二枚貝の殻長の成長に伴う変化 (2014)
  • Author(s): 吉田 歩・井上猛・岡野将大・山崎英樹・伊藤篤・崎山一孝・阪倉良孝
  • Organizer: 日本水産増殖学会大会第13回
  • Place of Presentation: 広島大学大学院生物圏科学研究科（広島県西条市）
  • Year and Date: 2014-10-18 – 2014-10-19
• [Presentation] 干潟域放流種苗3種（トラフグ, クルマエビ, アサリ）の捕食・被食関係 (2014)
  • Author(s): 吉田歩・黒澤明日香・日高成陽・山崎英樹・伊藤篤・崎山一孝・阪倉良孝
  • Organizer: 日本水産増殖学会大会第13回
  • Place of Presentation: 広島大学大学院生物圏科学研究科（広島県西条市）
  • Year and Date: 2014-10-18 – 2014-10-19
• [Presentation] トラフグ稚魚のクルマエビ捕食条件 (2014)
  • Author(s): 吉田 歩・山根 晃・井上 猛・井上英理香・崎山一孝・山崎英樹・阪倉良孝
  • Organizer: 平成26年度日本水産学会春季大会
  • Place of Presentation: 北海道大学函館キャンパス（北海道函館市）
• [Presentation] トラフグ稚魚の成長に伴う塩分選択と二枚貝に対する食性の変化 (2013)
  • Author(s): 164) 山根晃・吉田歩・井上英理香・井上猛・山崎英樹・崎山一孝・阪倉良孝
  • Organizer: 日本水産増殖学会第12回大会
  • Place of Presentation: 鹿児島大学稲盛会館（鹿児島県鹿児島市）
• [Presentation] トラフグ稚魚の塩分選択性 (2013)
  • Author(s): 山根晃・沖田光玄・高谷智裕・阪倉良孝・山崎英樹・崎山一孝
  • Organizer: 平成25年度日本水産学会春季大会
  • Place of Presentation: 東京海洋大学
• [Presentation] Salinity selectivity of tiger puffer juveniles. (2012)
  • Author(s): Yamane, H., Okita, K., Sakiyama, K., Yamasaki, H., Takatani, T. & Sakakura, Y.
  • Organizer: 10th Japan-Korea, Korea- Japan Joint Symposium on Aquaculture 2012
  • Place of Presentation: 長崎大学