Fisheries Science

, Volume 85, Issue 6, pp 901–911 | Cite as

Effects of spawning temperature on the reproductive characteristics of walleye pollock Gadus chalcogrammus

  • Hiroshige TanakaEmail author
  • Toru Nakagawa
  • Takashi Yokota
  • Masayuki Chimura
  • Yuuho Yamashita
  • Tetsuichiro Funamoto
Original Article Biology


Reproductive characteristics under different water temperature regimes were examined in hatchery-reared walleye pollock Gadus chalcogrammus. The fish had been cultured for 33 months post-hatching before the experiment, and the first spawning was observed from 24 to 27 months post-hatching. From 33 months post-hatching, fish were cultured at three temperature regimes (2, 5, and 8 °C), and spawning was observed from 36 to 39 months post-hatching. The peak of the spawning period was earliest at 8 °C and latest at 2 °C, and a 3 °C difference resulted in the 2–5 weeks difference in the peak spawning period. Thus, high temperature would have accelerated gonadal maturation. In contrast, the effect of temperature on the egg quality was unclear. Egg diameter was largest at 5 °C, followed by 2 °C and 8 °C, but the starvation tolerance of larvae was not significantly explained by spawning temperature. These results elucidate the mechanisms that underlie variability of the spawning period and the larval survival of wild walleye pollock.


Capital breeder Determinate spawner Gadoid fish Group-synchronous oocyte development Maternal effect Rearing experiment Walleye pollock Gadus chalcogrammus 



The authors are grateful for the support of laboratory members: N. Murakami, M. Okuizumi, Y. Suzuki, T. Yamamoto, T. Degoshi, and S. Takeda (Akkeshi laboratory, Hokkaido National Fisheries Research Institute, Japan Fisheries Research and Education Agency) for their help in conducting these experiments, and M. Takahashi, R. Itoh, M. Nakagawa, M. Ishiyama, and Y. Fuchigami (Kushiro laboratory, Hokkaido National Fisheries Research Institute, Japan Fisheries Research and Education Agency) for fish measurement and sample treatment. The authors are also grateful to the editor (Y. Kurita) and two anonymous reviewers for providing constructive comments that greatly improved the original manuscript. This study was financially supported by Japan Fisheries Research and Education Agency.

Supplementary material

12562_2019_1343_MOESM1_ESM.docx (20 kb)
Supplementary material 1 (DOCX 19 kb)


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Copyright information

© Japanese Society of Fisheries Science 2019

Authors and Affiliations

  1. 1.Kushiro Laboratory, Hokkaido National Fisheries Research InstituteJapan Fisheries Research and Education AgencyKushiroJapan
  2. 2.National Research Institute of Far Seas FisheriesJapan Fisheries Research and Education AgencyShimizuJapan
  3. 3.Akkeshi Laboratory, Hokkaido National Fisheries Research InstituteJapan Fisheries Research and Education AgencyAkkeshiJapan
  4. 4.National Research Institute of Fisheries ScienceJapan Fisheries Research and Education AgencyYokohamaJapan
  5. 5.Fisheries AgencyChiyodaJapan

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