| Autor: |
Santos VSV; Department of Environmental Health, Laboratory of Environmental Health, Federal University of Uberlândia, Santa Mônica Campus, Avenida João Naves de Ávila, 2121, 38.408-100, Uberlândia, Minas Gerais, Brazil. vanessasvs2009@hotmail.com.; Institute of Genetics and Biochemistry, Department of Biotechnology, Federal University of Uberlândia, Umuarama Campus, Avenida Pará, 1720, 38.400-902, Uberlândia, Minas Gerais, Brazil. vanessasvs2009@hotmail.com., Campos CF; Department of Genetics and Biochemistry, Laboratory of Cytogenetics and Mutagenesis, Federal University of Uberlândia, Umuarama Campus, Avenida Pará, 1720, 38.400-902, Uberlândia, Minas Gerais, Brazil., de Campos Júnior EO; Department of Genetics and Biochemistry, Laboratory of Cytogenetics and Mutagenesis, Federal University of Uberlândia, Umuarama Campus, Avenida Pará, 1720, 38.400-902, Uberlândia, Minas Gerais, Brazil., Pereira BB; Department of Environmental Health, Laboratory of Environmental Health, Federal University of Uberlândia, Santa Mônica Campus, Avenida João Naves de Ávila, 2121, 38.408-100, Uberlândia, Minas Gerais, Brazil. boscolli86@hotmail.com. |
| Abstrakt: |
In International guidelines for standard ecotoxicological bioassays, Daphnia magna is the most applied microcrustacea for assessing toxicity of different pollutants. However, in research realized in tropical and subtropical areas, autochthonous species must be prioritized because they are adapted to the specificities of ecosystems. In this sense, the present study aimed to assess and compare (with D. magna) the sensitivity of the tropical species Dendrocephalus brasiliensis as alternative test species for monitoring of contaminants in tropical and subtropical freshwaters, by carrying out acute toxicity tests with different pollutants. According results, D. brasiliensis presented EC50-48 h values lower than D. magna for all substances tested, indicating higher sensitivity of the tropical organism in relation to the temperate organism. Furthermore, comparing the results obtained with data from other studies, D. brasiliensis is more sensitive to the chemicals tested than D. magna and has similar sensitivity to Pseudosida ramosa and Ceriodaphnia dubia, common species in tropical areas. In view of this, we suggest that D. brasiliensis can be used as alternative test species for monitoring of contaminants in tropical and subtropical freshwaters. |
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