Effect threshold for selenium toxicity in juvenile splittail, Pogonichthys macrolepidotus A

Mark C. Rigby, Xin Deng, Thomas M. Grieb, Swee J Teh, Silas S O Hung

Research output: Contribution to journalArticle

8 Scopus citations


In fish, selenium can bioaccumulate and cause adverse impacts. One of the fish species potentially at risk from selenium in the San Francisco Bay (California, USA) is the splittail (Pogonichthys macrolepidotus). Previous studies have derived a whole body NOAEL and LOAEL of 9.0 and 12.9 mg/kg-dw, respectively, for selenium in juveniles. However, the NOAEL/LOAEL approach leaves some uncertainty regarding the threshold of toxicity. Therefore, the raw data from the original experiment was re-analyzed using a logistic regression to derive EC 10 values of 0.9 mg/kg-dw in feed, 7.9 mg/kg-dw in muscle, 18.6 mg/kg-dw in liver for juvenile splittail. Selenium concentrations in the dietary items of wild splittail exceed the EC 10 values derived here. Thus, deformities previously reported in wild splittail may have resulted from selenium exposures via the food chain.

Original languageEnglish (US)
Pages (from-to)76-79
Number of pages4
JournalBulletin of Environmental Contamination and Toxicology
Issue number1
StatePublished - Jan 2010



  • Deformities
  • EC
  • Selenium
  • Splittail

ASJC Scopus subject areas

  • Health, Toxicology and Mutagenesis
  • Pollution
  • Toxicology

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