scholarly journals Analyses of Factors to Affect the Bioassay System Using Luminescent Bacterium Vibrio fischeri

2006 ◽  
Vol 52 (1) ◽  
pp. 9-16 ◽  
Author(s):  
Shinichi Nagata ◽  
Xiaojian Zhou
Keyword(s):  
Vibrio Fischeri ◽  
Luminescent Bacterium ◽  
Bioassay System

An assessment of the toxicity of some pesticides and their metabolites affecting a natural aquatic environment using the Microtox™ system

2000 ◽  
Vol 42 (1-2) ◽  
pp. 19-24 ◽  
Author(s):  
I. Amorós ◽  
R. Connon ◽  
H. Garelick ◽  
J.L. Alonso ◽  
J.M. Carrasco
Keyword(s):  
Aquatic Ecosystems ◽  
Vibrio Fischeri ◽  
Aquatic Toxicity ◽  
Parent Compound ◽  
Natural Ecosystem ◽  
Luminescent Bacterium ◽  
Compound A ◽  
Food Network ◽  
Pure Substances ◽  
The Impact

The conservation and preservation of aquatic ecosystems is of utmost importance due to the high diversity and density of species and their complex food network. The evaluation of the potential adverse environmental impact caused by pesticides entering water bodies is an important parameter in aquatic toxicity. The toxicity of the insecticide, Fenitrothion and two of its metabolites, 3-methyl-4 nitrophenol and 3-methyl-4-nitroanisole, and of the herbicides Thiobencarb and Molinate, commonly used in rice fields in Valencia near the protected area of lake Albufera, has been tested by using the Microtox™ system. The 15 min EC50 values obtained with the marine luminescent bacterium Vibrio fischeri showed that the Thiobencarb was the most toxic of the three tested pesticides with an EC50 value of 0.03 mg/l. The EC50 values of the first two steps of the Fenitrothion hydrolysis indicated that while the first metabolite, 3-methyl-4-nitrophenol, was as toxic as its parent compound, a decreased toxicity was observed for the second metabolite, 3-methyl-4-nitroanisole. In order to analyze the toxic effects of pesticides in complex mixtures the EC50 values of Fenitrothion, Molinate and Thiobencarb as pure substances and their mixtures were compared. The impact of the pesticides in the natural ecosystem was also studied and a protective effect of lake water was observed.

Solid-Phase Test for Sediment Toxicity Using the Luminescent Bacterium, Vibrio Fischeri

2005 ◽  
pp. 107-136 ◽  
Author(s):  
Ken Doe ◽  
Paula Jackman ◽  
Rick Scroggins ◽  
Don McLeay ◽  
Gary Wohlgeschaffen
Keyword(s):  
Vibrio Fischeri ◽  
Solid Phase ◽  
Sediment Toxicity ◽  
Luminescent Bacterium
Sign in / Sign up

Export Citation Format

Share Document