A 96-hour sediment bioassay of Duluth and Superior Harbor basins (Minnesota) usingHexagenia Limbata,Asellus communis, Daphnia magna, andPimephales promelas as test organisms

Prater, Bayliss L.; Anderson, Max

doi:10.1007/bf01686062

Cited by 44 publications

(12 citation statements)

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“…As for the organism Danio rerio, the toxicity evaluation of the environmental samples was based on the mortality percentage proposed by Prater & Anderson (1977), which considers that mortality percentages of 1 to 25% indicate low environmental toxicity; 26 to 50%: medium toxicity, and 51 to 100%: high toxicity.…”

Section: Methodsmentioning

confidence: 99%

Limnological and ecotoxicological studies in the cascade of reservoirs in the Tietê river (São Paulo, Brazil)

et al. 2005

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An evaluation was made of the quality of samples of water and sediment collected from a series of reservoirs in the Tietê River (SP), based on limnological and ecotoxicological analyses. The samples were collected during two periods (Feb and Jul 2000) from 15 sampling stations. Acute toxicity bioassays were performed using the test organism Daphnia similis, while chronic bioassays were carried out with Ceriodaphnia dubia and Danio rerio larvae. The water samples were analyzed for total nutrients, total suspended matter and total cadmium, chromium, copper and zinc concentrations, while the sediment samples were examined for organic matter, granulometry and potentially bioavailable metals (cadmium, chromium, copper and zinc). The results obtained for the limnological variable, revealed differences in the water quality, with high contribution of nutrients and metals for Tietê and Piracicaba rivers, besides the incorporation and sedimentation, consequently causing a reduction of materials in Barra Bonita reservoir, thus promoting the improvement of the water quality in the other reservoirs. The toxicity bioassays revealed acute toxicity for Daphnia similis only in the reservoirs located below Barra Bonita dam. On the other hand, chronic toxicity for Ceriodaphnia dubia and acute for Danio rerio showed a different pattern, decreasing in magnitude from Barra Bonita to Três Irmãos, demonstrating an environmental degradation gradient in the reservoirs.Keywords: reservoirs ecology, limnology, ecotoxicology, Tietê River. RESUMO Estudos limnológicos e ecotoxicológicos na cascata de reservatórios do rio Tietê (São Paulo, Brasil)O presente trabalho visou avaliar a qualidade de amostras de água e sedimento dos reservatórios em cascata do rio Tietê (SP) através de análises limnológicas e ecotoxicológicas. Foram realizadas coletas de água e sedimento em dois períodos (fevereiro e julho de 2000) e em 15 estações de amostragem. Foram realizados bioensaios de toxicidade aguda para Daphnia similis, de toxicidade crônica para Ceriodaphnia dubia e para larvas pós-eclodidas de Danio rerio. Análises de nutrientes totais, material em suspensão total e cádmio, cromo, cobre e zinco foram realizadas para as amostras de água e análises de matéria orgânica, granulometria e metais biodisponíveis (cádmio, cromo, cobre e zinco) para o sedimento. Os resultados obtidos para as variáveis limnológicas, revelaram diferenças na qualidade da água, com elevado aporte 698 RODGHER, S. et al.

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Section: Methodsmentioning

confidence: 99%

Limnological and ecotoxicological studies in the cascade of reservoirs in the Tietê river (São Paulo, Brazil)

et al. 2005

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“…Sediment toxicity testing began in earnest in 1977, with the freshwater benthic invertebrates Hexagenia limbata (Ephemeroptera) (e.g. Prater and Anderson 1977) and Chironomus tentans (Diptera) (e.g. Wentsel et al 1977).…”

Section: Sediment Toxicity Testsmentioning

confidence: 99%

Toxicology and Laboratory Studies

Rodríguez

Reynoldson

2011

The Pollution Biology of Aquatic Oligochaetes

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This chapter provides a chronological synthesis of the available literature and information on laboratory based studies of aquatic oligochaetes and has been organized into water-only vs. sediment toxicity tests, and acute vs. chronic toxicity tests. Toxicological studies have employed relatively few species. Absence of sediment in tests with aquatic oligochaetes is a source of stress and reduces realism in exposure conditions and most current toxicity work is performed in the presence of sediment. Thus, unless there is a requirement for water-only tests, for interspecies comparison of toxicity of chemical compounds, or for routine control of species sensitivity in laboratory cultures, these tests are considered inappropriate for oligochaete worms in ecological risk assessment. Field populations of several species have been demonstrated to vary genetically, and may have different tolerances to both environmental and anthropogenic stress. This suggests that test organisms should be obtained from cultures of a defined genetic strain, or alternatively the sensitivity of the populations should be intercalibrated with reference toxicants. Oligochaete worms are not uniformly more tolerant to contaminants than other test organisms. Comparative data for worms and other benthic invertebrates show that responses are species-specific and also contaminant-specific. Among the sublethal measurements, sexual reproduction seems to be the most easily standardised and informative endpoint, and has high ecological relevance, since reproductive impairment has the same long-term effect as mortality on the population. Sublethal, shortterm responses such as behavioural responses (avoidance behaviour, sediment reworking and sediment borrowing) need further standardization. In the future, in situ bioassays are promising tools in environmental risk assessment but will require the use of species characteristic of particular habitats or that are suitable for reproduction and toxicity assessment under different environmental conditions.

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“…The toxicity evaluation of the environmental samples was based on the mortality percentage proposed by Prater and Anderson (1977) which considered mortality percentages from 1 to 25% as low environmental toxicity, from 26 to 50% as medium toxicity and from 51 to 100% as high toxicity.…”

Section: Environmental Toxicitymentioning

confidence: 99%

Alterations on growth and gill morphology of Danio rerio (Pisces, Ciprinidae) exposed to the toxic sediments

Fracácio

Verani

Espíndola³

et al. 2003

Braz. arch. biol. technol.

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The objective of this work was to assess the toxicity of sediment samples from six cascade reservoirs in Tietê river system, in São Paulo State, Brazil, through chronic-partial toxicity bioassays with Danio rerio larvae as testorganisms. Histology of gills and biometric measurements were used to determine the existence of toxicity problems. The alterations on gill morphology here detected were considered of first stage (hyperplasia, lamellar junction and excess of mucous cells) in the first reservoirs and very slight in the last ones. The biometric analysis pointed to inadequate conditions for the growth of the test-organisms when exposed to the sediment of the rivers and upstream reservoirs and also indicated an improvement of environmental conditions along the system.

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A 96-hour sediment bioassay of Duluth and Superior Harbor basins (Minnesota) usingHexagenia Limbata,Asellus communis, Daphnia magna, andPimephales promelas as test organisms

Cited by 44 publications

References 1 publication

Limnological and ecotoxicological studies in the cascade of reservoirs in the Tietê river (São Paulo, Brazil)

Limnological and ecotoxicological studies in the cascade of reservoirs in the Tietê river (São Paulo, Brazil)

Toxicology and Laboratory Studies

Alterations on growth and gill morphology of Danio rerio (Pisces, Ciprinidae) exposed to the toxic sediments

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