Fisheries Science

, Volume 79, Issue 3, pp 367–373 | Cite as

Re-examination of age and growth of daggertooth pike conger Muraenesox cinereus in the western Seto Inland Sea, Japan

  • Shingo WatariEmail author
  • Minoru Murata
  • Yuichi Hinoshita
  • Kazuki Mishiro
  • Shigeyuki Oda
  • Makoto Ishitani
Original Article Biology


Age determination and growth using otolith rings in Muraenesox cinereus was re-examined in the western Seto Inland Sea, Japan. Previous study in this area indicated that new rings were formed annually from March to May, and then from September to October once individuals had achieved four or five rings. In this study, monthly changes in marginal growth rate indicated that the first ring was formed before November in the year following hatching, and from then on another ring was formed annually in July or August. The birth month was determined to be August based on a peak in monthly change in the gonad somatic index. Estimated von Bertalanffy growth functions were L = 806.6{1 − exp[− 0.33(t + 0.06)]} and L = 1264.0{1 − exp[− 0.19(t + 0.15)]} for males and females, respectively. Lengths after 3 years of age in this study were 100 mm longer than those in a previous study for both sexes.


Age determination Growth Muraenesox cinereus Otolith Seto inland sea 



We thank Mr. F. Okabe, Mr. H. Watanabe, and Mr. M. Teramoto of the Oita Fisheries Cooperative Association for their cooperation with the sampling. The authors are grateful to Ms. H. Yoshida, Ms. R. Honda and Ms. S. Tsuchiya for their kind assistance. We also thank to Dr. H. Zenitani, Fisheries Research Agency, for valuable suggestions on the manuscript. This work was supported by the Fisheries Research Agency, Japan.


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Copyright information

© The Japanese Society of Fisheries Science 2013

Authors and Affiliations

  • Shingo Watari
    • 1
    Email author
  • Minoru Murata
    • 2
  • Yuichi Hinoshita
    • 3
  • Kazuki Mishiro
    • 3
  • Shigeyuki Oda
    • 4
  • Makoto Ishitani
    • 4
  1. 1.National Research Institute of Fisheries and Environment of Inland Sea, Fisheries Research AgencyHatsukaichiJapan
  2. 2.Yamaguchi Prefectural Fisheries Research Center, Inland Sea DivisionYamaguchiJapan
  3. 3.Oita Prefectural Agriculture, Forestry and Fisheries Research Center, Fisheries Research DivisionBungotakadaJapan
  4. 4.Fukuoka Fisheries and Marine Technology Research Center Buzenkai LaboratoryFukuokaJapan

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