17 β-estradiol を暴露したヒメダカ雄における精巣の状態と精巣卵の出現頻度
書誌事項
- タイトル別名
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- State of Testes and Occurrence Frequency of Testis-ova in Japanese Medaka (Oryzias latipes) Exposed to 17β-estradiol
- 17 ベータ estradiol オ バクロ シタ ヒメダカ オス ニ オケル セイソウ ノ ジョウタイ ト セイソウラン ノ シュツゲン ヒンド
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抄録
Adult medaka (Oryzias latipes) were exposed to 17 beta-estradiol (E2) of the following concentrations 31.3 ng/L, 62.5ng/L, 123ng/L and 250ng/L for 21 days. The state of their testicular as well as the occurrence frequency of testis-ova were examined histologicaly in relation to their fertility. Results show that testis-ova appear in testes of males at all concentrations and their occurence frequency was highest at 62.5ng/L. Each developmental stage of the make germ cell was observed and the spermotazoa were produced actively at 31.3 ng/L, 62.5ng/L, 123ng/L and 250ng/L.. It was concluded that these concentration of E2 had no influence in the fertility of male medaka. At highest concentration (500 ng/L) it was found that the connective tissue was occupying most of the tetiscular tissue and decrease of the numver of the fertility. Although testis-ova were observed, concentrations below 250 ng/L may not give effect fertility of males.
収録刊行物
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- 九州大学大学院農学研究院学芸雑誌
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九州大学大学院農学研究院学芸雑誌 61 (1), 93-99, 2006-02-01
九州大学大学院農学研究院
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詳細情報 詳細情報について
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- CRID
- 1390009224762119040
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- NII論文ID
- 110004030856
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- NII書誌ID
- AA11577672
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- DOI
- 10.15017/4388
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- HANDLE
- 2324/4388
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- NDL書誌ID
- 7868811
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- ISSN
- 13470159
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- IRDB
- NDL
- CiNii Articles