Simultaneous Evaluation of the Acute Effects of Chemicals on Seven Aquatic Species

Ewell, William S.; Gorsuch, Joseph W.; Kringle, Robert; Robillard, Kenneth A.; Spiegel, Richard C.

doi:10.1897/1552-8618(1986)5[831:seotae]2.0.co;2

Cited by 11 publications

(12 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the present study, adults of N. conifer were affected by chromium and copper at higher concentrations than values indicated for D. magna (from 60 to 210 μg l −1 for chromium and from 1.4 to 18.5 μg l −1 for copper ;Khangarot 1989;Persoone et al 1989;Fargasová 1994;Ewell et al 1986;Dave 1984;Winner and Farrell 1976). These data indicate that D. magna is more sensitive than the copepod.…”

Section: Discussioncontrasting

confidence: 56%

Copper and Chromium Alter Life Cycle Variables and the Equiproportional Development of the Freshwater Copepod Notodiaptomus conifer (SARS)

Gutiérrez

Gagnetén

Paggi

2010

Water Air Soil Pollut

View full text Add to dashboard Cite

Recent studies have shown that the lower basin of the Salado River is highly polluted with copper and chromium. In order to evaluate the effect of those metals on Notodiaptomus conifer, a representative calanoid copepod, we carried out two (acute and chronic) experimental assays. In the first one, the 24-and 48-h EC 50 values were determined in nauplii and adults. Chronic assays were conducted to evaluate the time of development for nauplii, time of development for each copepodite stage, total development time, growth, number of ovigerous females, fecundity, and time required to produce the first egg sac. Additionally, the effect of those metals on the equiproportional model proposed for copepods was evaluated. Acute experiments reveled that juveniles were more sensible than adults. Although growth was not seriously affected by metal exposition, development time was delayed and reproductive variables were altered with the increase of metal concentrations. The deviation from the equiproportional model proposed for copepods proved to be a useful parameter to provide relevant information on toxicity of both metals along development time. In comparison with other zooplanktonic species, the highest sensitivity of N. conifer to copper and chromium makes it a suitable bioindicator in ecotoxicological tests.

show abstract

Section: Discussioncontrasting

confidence: 56%

Copper and Chromium Alter Life Cycle Variables and the Equiproportional Development of the Freshwater Copepod Notodiaptomus conifer (SARS)

Gutiérrez

Gagnetén

Paggi

2010

Water Air Soil Pollut

View full text Add to dashboard Cite

show abstract

“…The oligochaetes were most sensitive to Cd and had a similar range of sensitivity as the other invertebrate species for Cu, Zn, Pb, Cr, and Hg. A comparison of 96-h LC 50 values for seven aquatic species was obtained simultaneously by Ewell et al (1986), who also included L. variegatus as a test species. While Daphnia was at least as susceptible as the other organisms for all compounds tested, the relative sensitivities of the other species were highly chemical dependent.…”

Section: Comparative Sensitivity With Other Invertebratesmentioning

confidence: 99%

Toxicology and Laboratory Studies

Rodríguez

Reynoldson

2011

The Pollution Biology of Aquatic Oligochaetes

View full text Add to dashboard Cite

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.

show abstract

“…For the solvent control, AS-B was spiked with ethanol only. The solvent contribution is not expected to have an effect on the worms (Ewell et al 1986). …”

Section: Spiking Of Sedimentmentioning

confidence: 99%

Bioaccumulation of ivermectin from natural and artificial sediments in the benthic organism Lumbriculus variegatus

Slootweg

Alvinerie²,

Egeler

et al. 2010

J Soils Sediments

View full text Add to dashboard Cite

Purpose Although ivermectin is a widely used lipophilic parasiticide, data on its potential bioaccumulation in aquatic invertebrates are scarce. In this study, bioaccumulation patterns of radiolabeled 3 H-ivermectin from sediments into tissues of the sediment-dwelling worm Lumbriculus variegatus were investigated and assessed. Materials and methods Two independent studies are described. In the first study, bioaccumulation kinetics of ivermectin in L. variegatus were investigated by following uptake, elimination, and biotransformation of the compound in worms exposed in artificial sediment. In the second study, possible effects of sediment characteristics on bioavailability of ivermectin were evaluated by comparing accumulation in worms exposed in three different natural sediments and one artificial sediment (organic carbon content 2% to 21%). Results and discussion During 28 days of exposure, ivermectin accumulated in worms exposed in all sediments with calculated bioaccumulation factors ranging from 0.2 to 11.0. Bioaccumulation factors correlated with total increase in biomass of worms during the exposure period and with organic carbon content of the sediments. Calculated biotasediment accumulation factors ranged from 2.1 to 16.6, indicating that other variables, like quality of organic carbon and feeding behavior of the worms, may have influenced the bioavailability of ivermectin. Biotransformation products of ivermectin were only found in water, but not in sediment and worms. Conclusions Results show that ivermectin has potential to bioaccumulate in L. variegatus, which could indicate a risk for biomagnification of the compound in the food chain.

show abstract

Simultaneous Evaluation of the Acute Effects of Chemicals on Seven Aquatic Species

Cited by 11 publications

References 4 publications

Copper and Chromium Alter Life Cycle Variables and the Equiproportional Development of the Freshwater Copepod Notodiaptomus conifer (SARS)

Copper and Chromium Alter Life Cycle Variables and the Equiproportional Development of the Freshwater Copepod Notodiaptomus conifer (SARS)

Toxicology and Laboratory Studies

Bioaccumulation of ivermectin from natural and artificial sediments in the benthic organism Lumbriculus variegatus

Contact Info

Product

Resources

About