Fisheries Science

, Volume 78, Issue 4, pp 785–790

Comparison of growth histories of immature Japanese common squid Todarodes pacificus between the autumn and winter spawning cohorts based on statolith and gladius analyses

  • Hyejin Song
  • Norio Yamashita
  • Hideaki Kidokoro
  • Yasunori Sakurai
Original Article Biology

DOI: 10.1007/s12562-012-0503-7

Cite this article as:
Song, H., Yamashita, N., Kidokoro, H. et al. Fish Sci (2012) 78: 785. doi:10.1007/s12562-012-0503-7

Abstract

Growth of the autumn and winter spawning cohorts of the Japanese common squid Todarodes pacificus was examined based on daily growth increments in the statolith and gladius. The samples were taken from three groups of young (≤180 days old) squid: the autumn cohort collected in the Tsushima Current and the winter cohort collected in the Pacific near the coast and 1100 km offshore. The growth rate based on statolith analysis was highest in the winter cohort near the coast and similar in the two other groups. The daily growth based on gladius analysis during the month before capture was also highest in the winter cohort near the coast, and fluctuated more in the autumn cohort than in the winter cohort. The results suggest that gladius growth increments will be an important tool in future studies of growth in T. pacificus.

Keywords

Age Growth Gladius Statolith Todarodes pacificus 

Copyright information

© The Japanese Society of Fisheries Science 2012

Authors and Affiliations

  • Hyejin Song
    • 1
  • Norio Yamashita
    • 2
  • Hideaki Kidokoro
    • 3
  • Yasunori Sakurai
    • 4
  1. 1.Graduate School of Fisheries SciencesHokkaido UniversityHakodateJapan
  2. 2.Hokkaido National Fisheries Research InstituteFisheries Research AgencyKushiroJapan
  3. 3.Japan Sea National Fisheries Research InstituteFisheries Research AgencyNiigataJapan
  4. 4.Faculty of Fisheries SciencesHokkaido UniversityHakodateJapan

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