過剰肢カエル発生地におけるカエル及び環境中の内分泌撹乱化学物質調査

• 門上 希和夫

  北九州市環境科学研究所

• 武石 全慈

  北九州市立自然史博物館

• 倉本 満

  北九州市における外因性内分泌攪乱化学物質の野生生物に与える影響に関する検討委員会

• 小野 勇一

  北九州市における外因性内分泌攪乱化学物質の野生生物に与える影響に関する検討委員会

書誌事項

タイトル別名

• Occurrence and Effects of Endocrine-disrupting Chemicals in Frogs and Soil Samples.
• カジョウシカエル ハッセイチ ニ オケル カエル オヨビ カンキョウ チュウ ノ ナイブンピ カクラン カガク ブッシツ チョウサ

抄録

We analyzed the occurrence and effects of endocrine-disrupting chemicals in 2 species of frog, Yama-aka-gaeru (Rang ornativentris) and Nihon-aka-gaeru (Rang japonica), and in water and soil samples. Our aim was to determine the cause of malformation in Yama-aka-gaeru frogs that had been found with extra forelimbs. Frogs, not including malformed ones, and soil samples were collected at 3 sites: the study site where the malformed frogs had been found, and 2 reference sites where only normal individuals of both frog species were observed. We also performed a histological examination of the gonads of the frogs. We found significant levels of DDTs and oxychlordane in both species and soils collected at the study site. These chemicals are persistent and bioaccumulative. We did not detect less-stable chemicals such as simazine and atrazine. High concentrations of benzo (a) pyrene were detected in the soil samples at the study site, but not in the frogs. In both species the chemicals we detected occurred at significantly higher concentrations in males than in females; this difference was probably caused by transference of chemicals to the eggs. The chemical concentrations that we detected in the frogs were lower than the lowest levels reported to cause adverse effects. However, there was a significant negative correlation between DDT concentrations and testis size, and aspermatogenesis was demonstrated in some of the Nihon-aka-gaeru frogs. We suspect that endocrine-disrupting chemicals present in the eggs affect early embryogenesis.

収録刊行物

• 環境化学

  環境化学 10 (1), 35-43, 2000

  一般社団法人 日本環境化学会

キーワード

• Forg
• Malformation
• Soil
• Endocrine-disrupting chemical
• DDT

詳細情報

• CRID: 1390001204368490752
• NII論文ID: 10009672684
• NII論文ID: 10009717367
• NII書誌ID: AN10547099
• DOI: 10.5985/jec.10.35
• ISSN: 18825818
• ISSN: 09172408
• NDL書誌ID: 5322798
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I5322798
• Web Site: http://www.jstage.jst.go.jp/article/jec1991/10/1/10_1_35/_pdf
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可