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| Titel: |
Effect of Azo Dyes on Survivorship, Oxygen Consumption Rate, and Filtration Rate of the Freshwater Cladoceran Moina macrocopa |
| Auteur: |
Wong, C. K. Liu, X. J. Lee, A. O. K. Wong, P. K. |
| Verschenen in: |
Human and ecological risk assessment |
| Paginering: | Jaargang 12 (2006) nr. 2 pagina's 289-300 |
| Jaar: |
2006-04-01 |
| Inhoud: |
Toxicity of the azo dyes Procion Red MX-5B (PR), Procion Yellow HE-4R (PY), and Congo Red (CR) on the freshwater cladoceran Moina macrocopa was studied. The 4-day LC50 values for PR, PY, and CR were 59.0, 9.50, and 0.16 mg/L, respectively. Reproduction was a more sensitive endpoint than mortality. The onset of reproduction was delayed at azo dye concentrations ≥ 0.01 mg/L. The total number of young produced over 7 days was reduced by 49.8% in PR, 44.5% in PY, and 69.0% in CR. No reproduction was recorded at PY concentrations ≥ 100 mg/L and CR concentrations ≥ 1.0 mg/L. A significant decrease in oxygen consumption rate was observed after 4 days of exposure to azo dyes at concentration equivalent to 25% of the 4-day LC50. The effect of CR on oxygen consumption rate was observed after 4 days of exposure to a concentration equivalent to 10% of the 4-day LC50. Filtration rate was a more sensitive endpoint than oxygen consumption rate. For all three dyes, filtration rate was reduced after 4 days of exposure to concentrations equivalent to 10% of the 4-day LC50. Based on mortality, reproduction, oxygen consumption, and filtration, the order of toxicity was CR > PY > PR. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 7 van 19 gevonden artikelen
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