The Effect of Chromium on the Hemoglobin Concentration of Limnodrilus hoffmeisteri (Oligochaeta: Tubificidae)

The purpose of this study was to determine the toxic effects of polluted sediments, mainly chromium, the El Niagara reservoir (Aguascalientes, Mexico) on a benthic oligochaete species. Acute toxicity tests with hexavalent chromium in an artificial sediment–water system resulted in 24-, 48-, and 96-h...

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Bibliographic Details
Published in:Ecotoxicology and environmental safety 2001-11, Vol.50 (3), p.196-202
Main Authors: Flores-Tena, Francisco J., Martı́nez-Tabche, Laura
Format: Article
Language:English
Subjects:
Animal, plant and microbial ecology
Animals
Applied ecology
aquatic oligochaetes
Biological and medical sciences
Biological Availability
Carcinogens, Environmental - adverse effects
Carcinogens, Environmental - pharmacokinetics
Chromium - adverse effects
Chromium - pharmacokinetics
chromium toxicity
chromium uptake
Ecosystem
Ecotoxicology, biological effects of pollution
Effects of pollution and side effects of pesticides on protozoa and invertebrates
Environmental Exposure
Fundamental and applied biological sciences. Psychology
Geologic Sediments - chemistry
hemoglobin
Hemoglobins - drug effects
Limnodrilus hoffmeisteri
Mexico
Oligochaeta
Oligochaeta - physiology
polluted sediments
Tubificidae
Water Pollutants - adverse effects
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Summary:The purpose of this study was to determine the toxic effects of polluted sediments, mainly chromium, the El Niagara reservoir (Aguascalientes, Mexico) on a benthic oligochaete species. Acute toxicity tests with hexavalent chromium in an artificial sediment–water system resulted in 24-, 48-, and 96-h LC50 values of 49.53, 22.81, and 5.11 mg available chromium/kg dry sediment, respectivley, in Limnodrilus hoffmeisteri. The uptake of chromium by tubificids from artificial and polluted reservoir sediments was found to increase with metal concentration in sediments and exposure time. The increase was higher in experiments with artificial sediment. Cr concentration in worms was related to hemoglobin content, which decreased significantly when Cr concentrations were above 1.0 μg/g dry weight. Bioavailable chromium in the El Niágara reservoir sediments may be an important factor limiting the benthic species in this ecosystem.
ISSN:0147-6513
1090-2414
DOI:10.1006/eesa.2001.2104