Effects of hydrographic conditions on the transport of neon flying squid Ommastrephes bartramii larvae in the North Pacific Ocean

  • Yoshiki Kato Tohoku National Fisheries Research Institute, 25-259 Aza, Shimomekurakubo, Hachinohe, Aomori 031-0841, Japan
  • Mitsuo Sakai Tohoku National Fisheries Research Institute, 25-259 Aza, Shimomekurakubo, Hachinohe, Aomori 031-0841, Japan
  • Masachika Mmasujima National Research Institute of Fisheries Science, 2-12-4 Fuku-ura, Kanazawa-ku, Yokohama, Kanagawa 236-8648, Japan
  • Makoto Okazak National Research Institute of Fisheries Science, 2-12-4 Fuku-ura, Kanazawa-ku, Yokohama, Kanagawa 236-8648, Japan
  • Hiromichi Igarashi Japan Agency of Marine-Earth Science and Technology, Showa-cho, Kanazawa-ku, Yokohama 236-0001, Japan
  • Shuhei Masuda Japan Agency of Marine-Earth Science and Technology, Showa-cho, Kanazawa-ku, Yokohama 236-0001, Japan
  • Toshiyuki Awaji Graduate School of Science, Kyoto University, Kitashirakawa Oiwake-cho, Kyoto 606-8502, Japan
Palabras clave: Ambient temperature, neon flying squid, spawning cohort, 4D-VAR

Resumen

The neon flying squid, Ommastrephes bartramii, is widespread in subtropical and temperate regions. In the North Pacific Ocean, the species is comprised of two spawning cohorts; an autumn cohort and a winter-spring cohort. Interestingly, despite their apparently contiguous hatching periods, there is a marked disparity in the mantle length of both cohorts. We hypothesized that differences in the ambient temperature during larval development were responsible for the observed disparity in mantle size. Numerical simulations of ambient temperature revealed that water temperatures were approximately 1 °C higher in areas inhabited by the autumn cohort than they were in areas inhabited by the winter-spring cohort. The findings imply that differences in ambient water temperature and nutrient condition may be responsible for the observed differences in the growth of the autumn and winter-spring cohorts.

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Publicado
27-12-2016
Cómo citar
Kato, Y., Sakai, M., Mmasujima, M., Okazak, M., Igarashi, H., Masuda, S., & Awaji, T. (2016). Effects of hydrographic conditions on the transport of neon flying squid Ommastrephes bartramii larvae in the North Pacific Ocean. HIDROBIOLÓGICA, 24(1), 33-38. Recuperado a partir de https://hidrobiologica.izt.uam.mx/index.php/revHidro/article/view/564
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Artículos