Toxic response of endosulfan to breeding and non-breeding female mosquitofish

Daesik Park, Matthew D. Minor, Catherine R. Propper

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


To investigate if toxic effects by endosulfan, a commonly used insecticide, are dependent on the breeding condition of an organism, both breeding and non-breeding female western mosquitofish, Gambusia affinis, were exposed to 0.1, 0.5, 1 ppb of endosulfan. After a 5-week exposure period, we examined physical factors such as ovary weight and anal fin length in fish of both reproductive conditions and the size of thyroid follicles in non-breeders. Breeding female fish exposed to endosulfan did not show any significant changes in physical factors, but non-breeding females exposed to endosulfan had a significantly greater ratio of anal fin/body length and larger thyroid follicles than did control females. These results demonstrate that the response to exposure to environmental contaminants may be dependent upon seasonal reproductive condition.

Original languageEnglish (US)
Pages (from-to)119-124
Number of pages6
JournalJournal of Environmental Biology
Issue number2
StatePublished - Apr 2004


  • Endocrine disrupting compound
  • Endosulfan
  • Mosquitofish
  • Reproductive condition
  • Thyroid follicle

ASJC Scopus subject areas

  • Environmental Engineering
  • Toxicology
  • Health, Toxicology and Mutagenesis


Dive into the research topics of 'Toxic response of endosulfan to breeding and non-breeding female mosquitofish'. Together they form a unique fingerprint.

Cite this