Alteration of general behavior of male medaka, Oryzias latipes, exposed to tributyltin and/or polychlorinated biphenyls

Kei Nakayama, Yuji Oshima, Kazuaki Hiramatsu, Tsuneo Honjo

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

We examined the general behavior of male Japanese medaka, Oryzias latipes, after exposed to tributyltin (TBT), polychlorinated biphenyls (PCBs), or a mixture of these chemicals at a concentration of 1 μg/g body weight daily for 3 weeks. We analyzed swimming velocity as an indicator of acute toxicity and counted the frequencies of straight swimming and swimming in circles. We also calculated the entropy of the positions of the fish within the experimental chamber. Neither TBT nor PCBs nor their mixture affected the swimming velocity, suggesting that there were no acute toxic effects. However, PCBs exposure increased the frequencies of both straight and circular swimming, suggesting hyperactivity. TBT increased the positional entropy value. Both TBT and PCBs affect the general behavior of mature male medaka, although exposure to the 2 chemicals together has no significant additive behavioral effect.

Original languageEnglish
Pages (from-to)85-92
Number of pages8
JournalJournal of the Faculty of Agriculture, Kyushu University
Volume49
Issue number1
Publication statusPublished - Feb 1 2004

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Agronomy and Crop Science

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