Asymptotic growth trajectories of larval sardine ( Sardinops melanostictus ) in the coastal waters off western Japan

Growth trajectories of individual larvae of Japanese sardine, Sardinops melanostictus, caught in the coastal waters off western Japan were back-calculated from the first feeding stage up to date of capture based on individually determined allometric relationships between otolith daily ring radii and fish total lengths

Y. Watanabe; T. Kuroki

2002

Scholarcy highlights

  • Growth trajectories of individual larvae of Japanese sardine, Sardinops melanostictus, caught in the coastal waters off western Japan were back-calculated from the first feeding stage up to date of capture based on individually determined allometric relationships between otolith daily ring radii and fish total lengths
  • Growth rates gradually declined after the inflection points, and larval TLs converged into the infinite length of 29 to 32 mm, the sizes at which metamorphosis from larvae to juveniles is initiated
  • This asymptotic growth pattern in the larval stage resulted in the narrow ranges in TLs in spite of the wide range of ages of the larvae caught by boat seiners in the coastal waters
  • Slow growth and long duration of the metamorphosing stage could be influential in determining the cumulative total mortality in the early life stages of the Japanese sardine

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