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Effects of silvering state on induced maturation and spawning in wild female Japanese eel Anguilla japonica

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Abstract

The effects of silvering state of wild female Japanese eels Anguilla japonica on the success of induced maturation and the following spawning were examined. Thirty-eight females, collected in Mikawa Bay, were divided into four stages based on their silvering state: yellow (Y1), late-yellow (Y2), silver (S1) and late silver eels (S2). Despite injections of salmon pituitary extract (SPE) through the standard technique, Y1 and Y2 eels did not respond to the treatment with undeveloped gonad (gonad-somatic index [GSI]: 0.3–0.9), and all these females died by 5 weeks, probably due to an abnormal physiological condition. Most S1 (81%) and S2 eels (100%) matured completely (GSI: 17.8–51.4), and finally spawned successfully (69% for S1, 89% for S2). S2 eels fully matured with oocytes of over 750 μm in diameter by significantly smaller number of injections of SPE (5–6 times) than the case of S1 eels (6–8 times). The amount of eggs released by S2 eels (0.65±0.11 g/fish per body weight [BW]) was significantly larger than those by S1 eels (0.54±0.09 g/fish per BW). There was no difference in fertilization and hatching rates between eggs released by S1 eels and those of S2 eels. These results indicate that the success of induced maturation and spawning in wild female Japanese eels depends on their silvering state, and matured eggs can be obtained efficiently through the use of S2 eels rather than other stages.

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References

  1. Tatsukawa K. Eel Resources in East Asia. In: Aida K, Tsukamoto K, Yamauchi K (eds). Eel Biology. Springer, Tokyo, 2003; 293–298.

    Google Scholar 

  2. Yamauchi K, Nakamura M, Takahashi H, Takano K. Cultivation of larvae of Japanese eel. Nature 1976; 263: 412.

    Article  PubMed  CAS  Google Scholar 

  3. Motonobu T, Yamashita K, Oka HP. A memoir on the hatched larva of the Japanese eel, Anguilla japonica, from the adults matured artificially. Bull. Shizuoka Pref. Fish. Exp. Stn. 1976; 10: 87–90.

    Google Scholar 

  4. Satoh H, Yamamori K, Hibiya T. Induced spawning of the Japanese eel. Nippon Suisan Gakkaishi 1992; 58: 825–832.

    Google Scholar 

  5. Kagawa H, Tanaka T, Ohta H, Okuzawa K, Iinuma N. Induced ovulation by injection of 17, 20β-dyhydroxy-4-pregnen-3-one in the artificially matured Japanese eel, with special reference to ovulation time. Fish. Sci. 1997; 63: 365–367.

    CAS  Google Scholar 

  6. Liao IC, Chang SL. Induced spawning and larval rearing of Japanese eel Anguilla japonica in Taiwan. J. Taiwan Fish. Res. 2001; 9: 97–108.

    Google Scholar 

  7. Yamada S, Hori K, Seoka M. Toward the improvements of broodfish management and egg quality of the Japanese eel. Anguilla japonica, for larviculture — egg collection from young broodfish and effects of broodfish. diet on egg fatty acid contents. Bull. Fish. Res. Agen. 2006; 5 (Suppl.): 33–37.

    Google Scholar 

  8. Horie N, Utoh T, Mikawa N, Yamada Y, Okamura A, Tanaka S, Tsukamoto K. Influence of artificial fertilization methods of the hormone-treated Japanese eel Anguilla japonica upon the quality of eggs and larvae: comparison between stripping-insemination and spontaneous spawning methods. Nippon Suisan Gakkaishi 2008; 74: 26–35.

    Article  Google Scholar 

  9. Tanaka H, Kagawa H, Ohta H, Unuma T, Nomura K. The first production of glass eel in captivity: fish reproductive physiology facilitates great progress in aquaculture. Fish Physiol. Biochem. 2003; 28: 493–497.

    Article  Google Scholar 

  10. Tachiki H, Nakagawa T, Tamura K, Hirose K. Effects of oral administration of estradiol-17β to young on gonadal sex and growth of Japanese eel Anguilla japonica. Suisan Zoshoku 1997; 45: 61–66.

    CAS  Google Scholar 

  11. Miura T, Yamauchi K, Nagahama Y. Induction of spermatogensis in male Japanese eel, Anguilla japonica, by a single injection of human chorionic gonadotropin. Zool. Sci. 1991; 8: 63–73.

    CAS  Google Scholar 

  12. Okamura A, Yamada Y, Yokouchi K, Horie N, Mikawa N, Utoh T, Tanaka S, Tsukamoto K. A silvering index for the Japanese eel Anguilla japonica. Environ. Biol. Fish. 2007; 80: 77–89.

    Article  Google Scholar 

  13. Edel RK. The induction of maturation of female American eels through hormone injection. Helgol. Wiss. Meeresunters 1975; 27: 131–138.

    Article  CAS  Google Scholar 

  14. Lokman PH, Young G. Induced spawning and early ontogeny of New Zealand freshwater eels (Anguilla dieffenbachii and A. australis). N. Z. J. Mar. Freshw. Res. 2000; 34: 135–145.

    Article  Google Scholar 

  15. Müller T, Binder T, Váradi B, Bercsényi M. Induced maturation and successful egg release in the European eel (Anguilla anguilla L.). Halászat 2001; 94: 115–119.

    Google Scholar 

  16. Lopez E, Fontaine YA. Stimulation hormonale, in vivo, de l’ovaire d’anguille européenne as stade jeune. Reprod. Nutr. Dev. 1990; 30: 577–582.

    Article  PubMed  CAS  Google Scholar 

  17. Han YS, Liao IC, Huang YS, He JT, Chang CW, Tzeng WN. Synchronous changes of morphology and gonadal development of silvering Japanese eel Anguilla japonica. Aquaculture 2003; 219: 783–796.

    Article  Google Scholar 

  18. Sasai S, Aoyama J, Watanabe S, Kaneko T, Miller MJ, Tsukamoto K. Occurrence of migrating silver eels Anguilla japonica in the East China Sea. Mar. Ecol. Prog. Ser. 2001; 212: 305–310.

    Article  Google Scholar 

  19. Utoh T, Mikawa N, Okamura A, Yamada Y, Tanaka S, Horie N, Akazawa A, Oka HP. Ovarian morphology of the Japanese eel in Mikawa Bay. J. Fish Biol. 2004; 64: 502–513.

    Article  Google Scholar 

  20. Pankhurst NW. Relation of visual changes to the onset of sexual maturation in the European eel Anguilla anguilla (L.). J. Fish Biol. 1982; 21: 127–140.

    Article  Google Scholar 

  21. Ohta H, Kagawa H, Tanaka K, Okuzawa K, Iinuma N, Hirose K. Artificial induction of maturation and fertilization in the Japanese eel, Anguilla japonica. Fish Physiol. Biochem. 1997; 17: 163–169.

    Article  CAS  Google Scholar 

  22. Kagawa H, Iinuma N, Tanaka H, Ohta H, Okuzawa K. Effects of rearing period in seawater on induced maturation in female Japanese eel Anguilla japonica. Fish. Sci. 1998; 64: 77–82.

    CAS  Google Scholar 

  23. Dou SZ, Yamada Y, Okamura A, Shinoda A, Tanaka S, Tsukamoto K. Observations on the spawning behavior of artificially matured Japanese eels Anguilla japonica in captivity. Aquaculture 2007; 26: 117–129.

    Article  Google Scholar 

  24. Oka HP. Studies on the artificial maturation in the Japanese eel, Anguilla japonica-III: on the relation between the changes in body weight and oogenesis during the course of maturation. Bull. Shizuoka Pref. Fish. Exp. Stn. 1979; 13: 101–111.

    Google Scholar 

  25. Ijiri S, Kayaba T, Takeda N, Tachiki H, Adachi S, Yamauchi K. Pretreatment reproductive stage and oocyte development induced by salmon pituitary homogenate in the Japanese eel Anguilla japonica. Fish. Sci. 1998; 64: 531–537.

    CAS  Google Scholar 

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Authors and Affiliations

  1. IRAGO Institute Co. Ltd, 441-3605, Tahara, Aichi, Japan

    Akihiro Okamura, Yoshiaki Yamada, Noriyuki Horie, Tomoko Utoh, Naomi Mikawa, Satoru Tanaka & Katsumi Tsukamoto

  2. Ocean Research Institute, The University of Tokyo, 164-8639, Tokyo, Japan

    Katsumi Tsukamoto

Authors
  1. Akihiro Okamura
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  2. Yoshiaki Yamada
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  3. Noriyuki Horie
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  4. Tomoko Utoh
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  5. Naomi Mikawa
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  6. Satoru Tanaka
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  7. Katsumi Tsukamoto
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Correspondence to Akihiro Okamura.

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Okamura, A., Yamada, Y., Horie, N. et al. Effects of silvering state on induced maturation and spawning in wild female Japanese eel Anguilla japonica . Fish Sci 74, 642–648 (2008). https://doi.org/10.1111/j.1444-2906.2008.01569.x

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  • DOI: https://doi.org/10.1111/j.1444-2906.2008.01569.x

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