Acute Exposure to 17Α-Ethinylestradiol Alters Aggressive Behavior of Mosquitofish (Gambusia affinis) Toward Japanese Medaka (Oryzias latipes)

Hieu M. Dang, Yoshihiko Inagaki, Yuta Yamauchi, Takaaki Kurihara, Cong H. Vo, Yutaka Sakakibara

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Behavior of the mosquitofish (Gambusia affinis) toward the Japanese medaka (Oryzias latipes) was tested under exposure to environmental 17α-ethinylestradiol (EE2), a synthetic derivative of natural estrogen, estradiol. The mosquitofish were exposed to EE2 at different concentrations—0, 0.5, 5.0, and 50.0 ng/L—for 2 days, before their behavioral changes toward the medaka were observed. Results indicate that female mosquitofish became more aggressive at the high level of EE2 (50 ng/L), in terms of how persistently they attempted to approach the medaka. The males showed increased aggressive behavior toward the medaka, by significantly increasing the number and persistence of approach attempts at the low (0.5 and 5 ng/L) levels of EE2. At the highest EE2 concentration (50 ng/L), however, the number of attempts decreased, while the persistence increased in the males showing the same pattern as in the females. All behavioral changes were reversed once EE2 was removed from the environment.

Original languageEnglish
Pages (from-to)643-648
Number of pages6
JournalBulletin of Environmental Contamination and Toxicology
Volume98
Issue number5
DOIs
Publication statusPublished - 2017 Jan 1

Keywords

  • 17α-ethinylestradiol
  • Aggressive behavior
  • Endocrine disrupting chemical
  • Medaka
  • Mosquitofish

ASJC Scopus subject areas

  • Toxicology
  • Pollution
  • Health, Toxicology and Mutagenesis

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