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Toxicity determination of three sturgeon species exposed to glyphosate
Y. Filizadeh *, H. Rajabi Islami
Abstract:   (8875 Views)

  Glyphosate, N–(phosphonomethyl) glycine, has been widely used to control agricultural weeds in the north of Iran. However, it is also supposed to have adverse effects on natural sturgeon population. The present study was undertaken to evaluate the acute toxicity of glyphosate to three different sturgeon species (Huso huso, Acipenser stellatus, and A. persicus) under laboratory conditions. Fish were exposed to one of ten glyphosate concentrations (10 to 100 mg l–1 with 10 mg l–1 intervals), along with a control group. The values of the median lethal concentration (LC50) for each experimental species were estimated using a standard probit regression analyses after each 6, 12, 24, 48, 96, and 168 hours as exposure times. Results showed that increase in glyphosate exposure times up to 168 hours was simultaneous to decrease of the lethal concentration (LC50). 96–h LC50 of glyphosate for H. huso , A. stellatus and A . persicus were 26.4, 23.2 and 27.5 mg l–1, respectively. Glyphosate exhibited a slight to moderate toxicity in sturgeon species . However, it may negatively affect the natural population of sturgeons through decreasing of fry mass, smaller size of yolk sac and the initiation of unsafe behaviors.

Keywords: Glyphosate, Sturgeon, Toxicity, Caspian Sea, Iran
Full-Text [PDF 239 kb]   (2761 Downloads)    
Type of Study: Orginal research papers | Subject: Toxicology
Received: 2011/08/20 | Accepted: 2015/09/13 | Published: 2015/09/13
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Filizadeh Y, Rajabi Islami H. Toxicity determination of three sturgeon species exposed to glyphosate. IJFS. 2011; 10 (3) :383-392
URL: http://jifro.ir/article-1-211-en.html

Volume 10, Issue 3 (2011) Back to browse issues page
مجله علوم شیلاتی ایران Iranian Journal of Fisheries Sciences
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