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2007 Fiscal Year Final Research Report Summary

Study on the mechanism of lunar-related spawning in honeycomb grouper

Research Project

Project/Area Number 18580186
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field General fisheries
Research InstitutionNagasaki University

Principal Investigator

SOYANO Kiyoshi  Nagasaki University, Institute for East China Sea Research, Professor (80260735)

Co-Investigator(Kenkyū-buntansha) NAKAMURA Masaru  University of Ryukyus, Tropical Biosphere Research Centre, Professor (10101734)
NAGAE Masaki  Nagasaki University, Faculty of Environmental Studies, Associate Professor (00315227)
GEN Koichro  Nagasaki University, Researcher (80372051)
Project Period (FY) 2006 – 2007
Keywordsmaturation / lunar-related spawning / honeycomb grouper / hormone / spawning migration / biotelemetry
Research Abstract

The honeycomb grouper ainephelus merra, which is distributed in the sub-tropical and tropical area in Pacific Ocean, is known as a lunar-related spawning. However, details of gonadal development and spawning in this species are not well understood. In this study, we investigated the gonadal development, hormonal changes, and expression of gonadotropin gene in female collected from the reef area around Sesoko Island and Iriomote Island in Okinawa during spawning season. In addition, we investigated the spawning migration to suitable environment for spawning using biotelemetry method.
Ovaries of fish collected in both areas were occupied with oocytes of the tertiary yolk stage, when gonadosomatic index increased and reached the maximum level around full moon. However, mature size of fish in Ireornete Island was smaller than that in Sesoko Island. Moreover, fish of Treomote started female-to-male sex change immediately after the spawning season. On the other hand, sex change in fish collected from Sesoko Island stared in a few months after the spawning season. The different characteristics in both areas may depend on the difference in density, niche in the reefs, depth, water current, and water temperature. Estradiol levels indicated high just prior to spawning. Luteinizing hormone beta subunit gene expressed during reproductive period in female grouper, suggesting LH has important roles on gonadal development and steroid synthesis. In both areas, the fish migrated to suitable environment for spawning from habitat place just after full moon. It appears that the environment has water depth necessary to do the spawning behavior.

  • Research Products

    (28 results)

All 2008 2007 2006

All Journal Article (11 results) (of which Peer Reviewed: 5 results) Presentation (16 results) Book (1 results)

  • [Journal Article] Effects of light intensity and color of rearing tank on cannibalismin the juvenile orange-spotted grouper (Epinephelus coioides).2008

    • Author(s)
      Takeshita, A., Soyano. K.
    • Journal Title

      Aquaculture Science 56

      Pages: 175-180

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] Induction of maturation and ovulation with HCG treatment in thesevenband grouper, Epinephelus septemfasciatus.2008

    • Author(s)
      Song, Y. B., Baek, H. J., Kim, H. B., Soyano. K., Kim, S. J., Lee, Y. D.
    • Journal Title

      Journal of Aquaculture 21

      Pages: 96-101

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] Role of follicle-stimulating hormone and androgens on the sexualinversion of sevenband grouper Epinephelus septemfasciatus.2008

    • Author(s)
      Kline, R. J., Khan, LA., Soyano. K., Takushima, M.
    • Journal Title

      North American Journal of Aquaculture 70

      Pages: 266-272

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] Effects of light intensity and color of rearing tank on cannibalism in the juvenile orange-spotted grouper (Epinephelus coioides).2008

    • Author(s)
      Takeshita, A., Soyano, K.
    • Journal Title

      Aquaculture Science 56

      Pages: 175-180

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Induction of maturation and ovulation with HCG treatment in the sevenband grouper, Epinephelus septemfasciatus.2008

    • Author(s)
      Song, Y. B., Baek, H. J., Kim, H. B., Soyano, K., Kim, S. J., Lee, Y. D.
    • Journal Title

      Journal of Aquaculture 21

      Pages: 96-101

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Role of follicle-stimulating hormone and androgens on the sexual inversion of sevenband grouper Epinephelus septemfasciatus.2008

    • Author(s)
      Kline, R. J., Khan, LA., Soyano, K., Takushima, M.
    • Journal Title

      North American Journal of Aquaculture 70

      Pages: 266-272

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Reproduction and larviculture of seven-band grouper, Epinephelus septernfasciatus.2008

    • Author(s)
      Soyano, K., Sakakura, Y., Hagiwara, A
    • Journal Title

      The Aquaculture of Groupers, (eds. Liao, I C., Leano, E. M.) National Taiwan Ocean University, Keelung, Taiwan.

      Pages: 1-27

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Induction of sex change within two full moons during breedingseason and spawning in grouper.2006

    • Author(s)
      Alam, M. A., Bhandari, R. K., Kobayashi, Y., Soyano. K. . Nakamura M
    • Journal Title

      Aquaculture 255

      Pages: 532-535

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] Changes in androgen-producing cell size and circulating11-ketotestosterone level during female-male sex change ofhoneycomb grouper Epinephelus merra.2006

    • Author(s)
      Alam, M. A., Bhandari, R. K., Kobayashi, Y., Nakamura, S., Soyano. K., Nakamura. M.
    • Journal Title

      Molecular Reproduction and Development 73

      Pages: 206-214

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] Induction of sex change within two full moons during breeding season and spawning in grouper.2006

    • Author(s)
      Alam, M. A., Bhandari, R. K., Kobayashi, Y., Soyano, K., Nakamura, M.
    • Journal Title

      Aquaculture. 255

      Pages: 532-535

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Changes in androgen-producing cell size and circulating 11-ketotestosterone level during female-male sex change of honeycomb grouper Epinephelus merra.2006

    • Author(s)
      Alam, M. A., Bhandari, R. K., Kobayashi, Y., Nakamura, S., Soyano, K., Nakamura, M.
    • Journal Title

      Molecular Reproduction and Development 73

      Pages: 206-214

    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] Spawning of grouper.2008

    • Author(s)
      Soyano, K., Izumida, D., Inagami, Y., Aoki, J., Takushima, M.
    • Organizer
      3rd ECSER Symposium "Ecophysiology"
    • Place of Presentation
      Nagasaki, Japan
    • Year and Date
      20081200
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] ハタ科魚類の産卵2008

    • Author(s)
      征矢野清, 泉田大介, 稲上裕也, 青木純哉, 宅島めぐみ
    • Organizer
      第3回ECSERシンポジウムMarine Ecophysiology
    • Place of Presentation
      長崎
    • Year and Date
      20080300
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Study on reproductive physiology of marine fish in East China Sea.2007

    • Author(s)
      Soyano, K., Takushima, M., Aoki, J., Nagae, M.
    • Organizer
      4th Japan-Korea, Korea-Japan Joint Meeting on Reproductive Biology of Aquatic Animals.
    • Place of Presentation
      長崎
    • Year and Date
      20071100
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Effect of hormone treatment for ovarian development in pre-pubertalsevenband grouper Epinephelus septemfasciatus.2007

    • Author(s)
      Tokunaga, K., Takushima, M., Soyano, K.
    • Organizer
      4th Japan-Korea, Korea-Japan Joint Meeting on Reproductive Biology of Aquatic Animals.
    • Place of Presentation
      長崎
    • Year and Date
      20071100
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Characteristics of sex-maturation and spawning behavior in thepopulation of Iriomote and Sesoko Island, Okinawa, in honeycombgrouper Epinephelus merra.2007

    • Author(s)
      Inagami, Y., Masumoto, T., Akiyama, N., Kohno, H., Nakamura, M., Soyano, K.
    • Organizer
      4th Japan-Korea, Korea-Japan Joint Meeting on Reproductive Biology of Aquatic Animals.
    • Place of Presentation
      長崎
    • Year and Date
      20071100
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Study on reproductive physiology of marine fish in East China Sea.2007

    • Author(s)
      Soyano, K., Takushima, M., Aoki, J., Nagae, M.
    • Organizer
      4th Japan-Korea, Korea-Japan Joint Meeting on Reproductive Biology of Aquatic Animals.
    • Place of Presentation
      Nagasaki, Japan
    • Year and Date
      20071100
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] Effect of hormone treatment for ovarian development in pre-pubertal sevenband grouper Epinephelus septemfasciatus.2007

    • Author(s)
      Tokunaga, K., Takushima, M., Soyano, K.
    • Organizer
      4th Japan-Korea, Korea-Japan Joint Meeting on Reproductive Biology of Aquatic Animals.
    • Place of Presentation
      Nagasaki, Japan
    • Year and Date
      20071100
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] Characteristics of sex-maturation and spawning behavior in the population of Iriomote and Sesoko Island, Okinawa, in honeycomb grouper Epinephelus merra.2007

    • Author(s)
      Inagami, Y., Masumoto, T., Akiyama, N., Kohno, H., Nakamura, M., Soyano, K.
    • Organizer
      4th Japan-Korea, Korea-Japan Joint Meeting on Reproductive Biology of Aquatic Animals.
    • Place of Presentation
      Nagasaki, Japan
    • Year and Date
      20071100
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] Expression of biological activity red seabream gonadotropins in abaculovirus system : comparison of two different strategies regardingtheir expression.2007

    • Author(s)
      Gen, K., Soyano, K., Okuzawa, K., Kagawa, H.
    • Organizer
      8th International Symposium on Reproductive Physiology of Fish.
    • Place of Presentation
      サンマロ・フランス
    • Year and Date
      20070600
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Expression of biological activity red seabream gonadotropins in a baculovirus system : comparison of two different strategies regarding their expression.2007

    • Author(s)
      Gen, K., Soyano, K., Okuzawa, K., Kagawa, H
    • Organizer
      8th International Symposium on Reproductive Physiology of Fish.
    • Place of Presentation
      Saint Malo, France
    • Year and Date
      20070600
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] ハタ科魚類の成熟と産卵2006

    • Author(s)
      征矢野清
    • Organizer
      琉球大学熱帯生物圏研究センター平成18年度シンポジウム
    • Place of Presentation
      沖縄県本部町
    • Year and Date
      20061200
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] 西表島及び瀬底島に生息するカンモンハタEpinephelus merraの性成熟と産卵行動の特徴2006

    • Author(s)
      稲上裕也, 増本貴士, 秋山信彦, 河野裕美, 中村 将, 征矢野清
    • Organizer
      琉球大学熱帯生物圏研究センター平成18年度シンポジウム
    • Place of Presentation
      沖縄県本部町
    • Year and Date
      20061200
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Sex-maturation and spawning behavior of honeycomb grouper Epinephelus merra, at Iriomote and Sesoko Islands, Okinawa, Japan.2006

    • Author(s)
      Inagami, Y., Masumoto, T., Akiyama, N., Kohno, H., Nakamura, M., Soyano, K.
    • Organizer
      Korea-Japan, Japan-Korea Joint Meeting on Reproductive Biology of Aquatic Animals.
    • Place of Presentation
      韓国済州島
    • Year and Date
      20061200
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Maturation and spawning of grouper.2006

    • Author(s)
      Soyano, K.
    • Organizer
      Tropical Biosphere Research Centre Symposium
    • Place of Presentation
      Okinawa
    • Year and Date
      20061200
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] Reproductive characteristics of honeycomb grouper in Iriomote Island and Sesoko Island, Okinawa2006

    • Author(s)
      Inagami, Y., Masumoto, T., Akiyama, N., Kohno, H., Nakamura, M., Soyano, K.
    • Organizer
      Tropical Biosphere Research Centre Symposium
    • Place of Presentation
      Okinawa
    • Year and Date
      20061200
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] Sex-maturation and spawning behavior of honeycomb grouper Epinephelus merra, at Iriomote and Sesoko Islands, Okinawa, Japan.2006

    • Author(s)
      Inagami, Y., Masumoto, T., Akiyama, N., Kohno, H., Nakamura, M., Soyano, K.
    • Organizer
      Korea-Japan, Japan-Korea Joint Meeting on Reproductive Biology of Aquatic Animals.
    • Place of Presentation
      Jeju, Korea
    • Year and Date
      20061100
    • Description
      「研究成果報告書概要(欧文)」より
  • [Book] Reproduction and larviculture of seven-band grouper, Epinephelusseptemfasciatus. pp 1-27, The Aquaculture of Groupers. (eds. Liao, IC. and Leano, E. M. ).2008

    • Author(s)
      Soyano. K., Sakakura, Y., Hagiwara, A
    • Total Pages
      241
    • Publisher
      National Taiwan Ocean University, Keelung, Taiwan
    • Description
      「研究成果報告書概要(和文)」より

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Published: 2010-06-09  

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