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Acute ecotoxicity bioassay using Dendrocephalus brasiliensis: alternative test species for monitoring of contaminants in tropical and subtropical freshwaters

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Abstract

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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Acknowledgements

Financial support from “Conselho Nacional de Pesquisa e Desenvolvimento” (CNPq) is acknowledged.

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Correspondence to Vanessa Santana Vieira Santos or Boscolli Barbosa Pereira.

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The authors declare that they have no conflict of interest.

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All applicable international, national and institutional guidelines for the care of use of animals were followed.

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Santos, V.S.V., Campos, C.F., de Campos Júnior, E.O. et al. Acute ecotoxicity bioassay using Dendrocephalus brasiliensis: alternative test species for monitoring of contaminants in tropical and subtropical freshwaters. Ecotoxicology 27, 635–640 (2018). https://doi.org/10.1007/s10646-018-1951-3

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  • DOI: https://doi.org/10.1007/s10646-018-1951-3

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