Late winter larval mesopelagic fish assemblage in the Kuroshio waters of the western North Pacific

  • Sassa C
  • Kawaguchi K
  • Mori K
  • 20


    Mendeley users who have this article in their library.
  • 17


    Citations of this article.


The larval mesopelagic fish assemblage and its distribution patterns were investigated in the Kuroshio region off southern Japan in late winter. A total of 8690 fish larvae was collected, 85.8% of which were mesopelagic fish larvae. Mesopelagic fish larvae were significantly more abundant in the area east of the Kuroshio axis than west of the Kuroshio axis (660.6 versus 194.5 ind 10 m−2). Sigmops gracile, Bathylagus ochotensis, Notoscopelus japonicus, Diaphus slender type and Myctophum asperum were the five most abundant larvae and accounted for 16.9, 16.4, 15.2, 13.9 and 9.3% of the total catch in numbers, respectively. We conclude that these larvae were transported by the Kuroshio Current to the more productive transition waters, where they spend their juvenile stage from spring to early summer. The possibility of expatriation and southward long-distance spawning migrations of N. japonicus and B. ochotensis are discussed, based on the geographic distribution patterns of their larvae, juveniles and adults.

Author-supplied keywords

  • Bathylagidae
  • Expatriation
  • Kuroshio
  • Larval fish assemblage
  • Mesopelagic fish larvae
  • Myctophidae
  • Spawning migration

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document

Get full text


  • Chiyuki Sassa

  • Kouichi Kawaguchi

  • Ken Mori

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free