養殖ドジョウ雌の生殖腺発達と性ステロイドの周年変化

DOI 日本農学文献記事索引 Web Site 被引用文献1件 参考文献43件
  • Solomon Kiros
    Graduate School of Science and Technology, Nagasaki University Institute for East China Sea Research, Nagasaki University
  • Aoki Jun-ya
    National Research Insutitute of Aquaculture, Tamaki Station, Fisheries Research Agency
  • Soyano Kiyoshi
    Institute for East China Sea Research, Nagasaki University

書誌事項

タイトル別名
  • Annual Changes in Ovarian Development and Sex Steroid Levels in Cultured Female Dojo Loach <I>Misgurnus anguillicaudatus</I>
  • Annual changes in ovarian development and sex steroid levels in cultured female dojo loach Misgurnus anguillicaudatus

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抄録

Dojo loach Misgurnus anguillicaudatus is a promising species for studies into population genetics and into assessing the effects of environmental factors on reproduction. In order to document first its basic reproductive biology, we examined gonadal development and analyzed plasma sex steroid profiles during the annual cycle of captive female dojo loach. Loach sampled from May through August displayed high gonadosomatic indices (GSI) and elevated levels of plasma steroids [testosterone (T), estradiol-17β(E2), and 17, 20β-dihydroxy-4-pregnen-3-one (DHP)]. Histologically, oocytes in advanced stages of vitellogenesis or in the migratory nucleus stage predominated in the period. Furthermore, distinct groups of oocytes in different stages of development were seen, reflecting the capacity for multiple spawns during the spawning season. The lowest GSI value (4.29±2.42) and lowest levels of T, E2 and DHP were observed in October, coinciding with the occurrence of regressed vitellogenic oocytes. Seasonal variation in measured parameters were consistent with the reproductive cycle of this species, presenting exciting avenues for further research into environmental science and aquaculture.

収録刊行物

  • 水産増殖

    水産増殖 59 (1), 19-28, 2011

    日本水産増殖学会

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