Ichthyological Research

, Volume 66, Issue 1, pp 155–159 | Cite as

First report of growth rate of juvenile chum salmon Oncorhynchus keta captured in the Sea of Okhotsk offshore

  • Kentaro HondaEmail author
  • Tatsuya Kawakami
  • Toshihiko Saito
  • Shigehiko Urawa
Short Report


The growth rate of 16 juvenile chum salmon Oncorhynchus keta (180–286 mm fork length) captured in the Sea of Okhotsk offshore during autumn 2002 was estimated using daily-incremental analysis of otoliths. The specimens originated from Hokkaido, Japan, and Sakhalin and Kamchatka, Russia. The average (range) of estimated mean daily growth in fork length was 1.19 (1.02–1.54) mm/day through the entire early ocean life and 1.05 (0.84–1.21) mm/day during the first 30 days after sea entry. These growth rates were higher than those reported previously for coastal resident or migrant juvenile chum salmon along the coast of Japan.


Early marine life Growth rate Pacific salmon Sea of Okhotsk 



We thank the staff members involved over the successive years of the study at the Japan Fisheries Research and Education Agency represented by J. Seki and the crew of the RV Torishima for their cooperation in collecting field data. We also thank T. Kitagawa and K. Shirai at the University of Tokyo for their support and help with the analysis using electron probe micro-analyzer. This study was supported by the Fisheries Agency of Japan, as part of the scientific and technological cooperation in fisheries between Japan and Russia in 2002. We declare that our experiments complied with the current Japanese laws.

Supplementary material

10228_2018_643_MOESM1_ESM.docx (66 kb)
Supplementary material 1 (DOCX 65 kb)
10228_2018_643_MOESM2_ESM.xlsx (10 kb)
Supplementary material 2 (XLSX 10 kb)


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Copyright information

© The Ichthyological Society of Japan 2018

Authors and Affiliations

  • Kentaro Honda
    • 1
    Email author
  • Tatsuya Kawakami
    • 2
    • 3
  • Toshihiko Saito
    • 1
  • Shigehiko Urawa
    • 1
  1. 1.Hokkaido National Fisheries Research InstituteJapan Fisheries Research and Education AgencySapporoJapan
  2. 2.Graduate School of Agricultural and Life SciencesThe University of TokyoTokyoJapan
  3. 3.Atmosphere and Ocean Research InstituteThe University of TokyoOtsuchi-choJapan

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