Journal cover Journal topic
Web Ecology An open-access peer-reviewed journal
Journal topic
Volume 7, issue 1
Web Ecol., 7, 35–39, 2007
https://doi.org/10.5194/we-7-35-2007
© Author(s) 2007. This work is distributed under
the Creative Commons Attribution 3.0 License.
Web Ecol., 7, 35–39, 2007
https://doi.org/10.5194/we-7-35-2007
© Author(s) 2007. This work is distributed under
the Creative Commons Attribution 3.0 License.

  21 Apr 2007

21 Apr 2007

Performance of the freshwater shrimp Atyaephyra desmarestii as indicator of stress imposed by textile effluents

S. Casimiro1 and M. L. Fidalgo2 S. Casimiro and M. L. Fidalgo
  • 1Center of Marine and Environmental Research (CIIMAR), Rua dos Bragas, 289, 4050123 Porto, Portugal
  • 2CIIMAR and Dept. of Zoology and Anthropology, Univ. Of Oporto, Praça Gomes Teixeira, 4099002 Porto, Portugal

Abstract. Textile plants consume large volumes of water and produce a great amount of wastewaters, which can be important sources of toxic discharges in receiving environments. The objective of this study was to evaluate the acute toxicity of textile effluents on the freshwater shrimp A. desmarestii. A whole effluent toxicity test procedure was used to determine the aggregate toxicity of three samples taken before and after wastewater treatment in a textile mill. The following LC50 − 48 h values (%, v/v) were calculated: Untreated effluent −29% effluent (sample 1), 22% effluent (sample 2), and 47% (sample 3); Treated effluent −73% effluent (sample 1), 74% effluent (sample 2), and > 100% (sample 3). Based upon acute toxicity units (TUa = 100/LC50), untreated effluent varied from toxic in samples 1 and 3 (2.00 ≤ TUa ≤ 4.00) to very toxic in sample 2 (TUa > 4.0), whereas treated effluent varied from no toxic in sample 3 to moderately toxic in samples 1 and 2 (1.33 ≤ TUa ≤ 1.99). Despite some limitations and constraints related to innate variability of industrial effluents, our results suggested that A. desmarestii can be a promising and potential test organism for assessing toxicity of complex chemical mixtures.

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