Evaluation of growth rates of juvenile chum and pink salmon in their early marine phase using the physiological and ecological techniques

• Project/Area Number: 25450289
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Aquatic bioproduction science
• Research Institution: Hokkaido Research Organization
• Principal Investigator: MIYAKOSHI Yasuyuki 地方独立行政法人北海道立総合研究機構, その他部局等, さけます資源部長 (70442639)
• Co-Investigator(Kenkyū-buntansha): SHIMIZU Munetaka 北海道大学, 大学院水産科学研究院, 講師 (90431337)
• Co-Investigator(Renkei-kenkyūsha): TORAO Mitsuru 北海道立総合研究機構さけます, 内水面水産試験場・道東センター, 主査 (80442672)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000); Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000); Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000); Fiscal Year 2013: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
• Keywords: サケ / カラフトマス / 成長率 / IGF-I / 耳石 / 沿岸 / インスリン様成長因子 / 耳石日周輪 / 沿岸域

Outline of Final Research Achievements

To evaluate the growth rates of chum and pink salmon in their early marine life, we analyzed the otolith daily increments of juvenile chum and pink salmon and examined the effective physiological indicators for growth rates. By otolith increment analyses, the dates of ocean entry and daily growth rates can be estimated. From examining the physiological indicators, the serum insulin-like growth factor (IGF)-I can be used as a most useful indicator to evaluate the growth rates of juvenile salmon. Serum IGF-I levels in chum and pink salmon estuarine area were lower and fish in the coastal area were higher, indicating that growths of juvenile salmon was activated when they left the estuarine area and migrated to the offshore while fish of low growth stay in the estuary. Until May, IGF-I levels in pink salmon were lower than chum salmon but were higher in June, which likely reflects a higher growth rate of this species.

Research Products

• [Journal Article] Circulating insulin-like growth factor-I in juvenile chum salmon: relationship with growth rate and changes during downstream and coastal migration in northeastern Hokkaido, Japan (2015)
  • Author(s): Kaneko N, Taniyama N, Inatani Y, Fujiwara M, Torao M, Miyakoshi Y, Shimizu M
  • Journal Title: Fish Physiology and Biochemistry Volume: 15
  • NAID: 120005820704
  • Peer Reviewed / Acknowledgement Compliant
• [Presentation] シロザケ稚魚における個体成長率とインスリン様成長因子-I血中蛋白・遺伝子発現量の関係 (2016)
  • Author(s): 金子信人・谷山奈津美・宮腰靖之・清水宗敬
  • Organizer: 平成28年度日本水産学会春季大会
  • Place of Presentation: 東京海洋大学
  • Year and Date: 2016-03-26
• [Presentation] Circulating insulin-like growth factor-I in juvenile chum and pink salmon: (2015)
  • Author(s): Kaneko N, Taniyama N, Inatani Y, Fujiwara M, Torao M, Miyakoshi Y, Shimizu M
  • Organizer: NPAFC(North Pacific Anadromous Fish Commission) Symposium 2015
  • Place of Presentation: 神戸国際会議場
  • Year and Date: 2015-05-17 – 2015-05-19
• [Presentation] Early marine residence and growth of juvenile chum and pink salmon in eastern Hokkaido (2015)
  • Author(s): Miyakoshi Y, Fujiwara M, Torao M, Kaneko N, Shimizu M, Nagata M
  • Organizer: NPAFC(North Pacific Anadromous Fish Commission) Symposium 2015
  • Place of Presentation: 神戸国際会議場
  • Year and Date: 2015-05-17 – 2015-05-19
• [Presentation] Early marine residence and growth of juvenile chum and pink salmon in eastern Hokkaido (2015)
  • Author(s): Miyakoshi, Y., Fujiwara, M., Torao, M., Kaneko, N., Shimizu, M., and Nagata, M.
  • Organizer: North Pacific Anadromous Fish Commission Symposium
  • Place of Presentation: Kobe Convention Center
  • Year and Date: 2015-05-17
  • Int'l Joint Research
• [Presentation] Circulating insulin-like growth factor-I in juvenile chum and pink salmon: relationship with growth rate and changes during downstream and coastal migration in eastern Hokkaido, Japan (2015)
  • Author(s): Kaneko, N., Taniyama, N., Inatani, Y., Fujiwara, M., Torao, M., Miyakoshi, Y., and Shimizu, M.
  • Organizer: North Pacific Anadromous Fish Commission Symposium
  • Place of Presentation: Kobe Convention Center
  • Year and Date: 2015-05-17
  • Int'l Joint Research
• [Presentation] カラフトマス稚魚の降海回遊に伴う生理学的な成長指標の変化 (2015)
  • Author(s): 金子信人・谷山奈津美・藤原 真・虎尾 充・宮腰靖之・清水宗敬
  • Organizer: 平成27年度日本水産学会春季大会
  • Place of Presentation: 東京海洋大学
  • Year and Date: 2015-03-27 – 2015-03-31
• [Presentation] 網走川流域・沿岸におけるシロザケ稚魚の生理的変化 (2014)
  • Author(s): 金子信人・谷山奈津美・稲谷 祐・長野雄太・宮腰靖之・藤原 真・虎尾 充・清水宗敬
  • Organizer: 平成26年度日本水産学会春季大会
  • Place of Presentation: 北海道大学
• [Presentation] オホーツク海東部沿岸におけるサケとカラフトマス幼稚魚の分布と成長 (2013)
  • Author(s): 宮腰靖之・藤原 真・虎尾 充・金子信人・清水宗敬
  • Organizer: 2013年度水産海洋学会研究発表大会
  • Place of Presentation: 京都大学