Ecotoxicological assessment for receiving waters with the premetamorphic tadpoles acute assay

Ferrari, Lucrecia; Torre, Fernando R. de la; Demichelis, Sandra O.; García, Matías; Salibián, Alfredo

doi:10.1016/j.chemosphere.2005.01.045

Cited by 29 publications

(20 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, in unpolluted freshwater bodies, Cu concentrations range between 1 and 20 mg/L, and, as a result of anthropogenic impacts, Cu concentrations might rise to even severalfold higher, as in the case of the Reconquista River, an urban ecosystem of Buenos Aires Province with values from 27 to 64 mg/L [40]. Consequently, our results on the susceptibility of R. arenarum to Cu point out that the toxicity reported for the Reconquista River might be at least partially related to the high level of Cu pollution in that urban ecosystem [30].…”

Section: Discussionmentioning

confidence: 98%

Stage‐dependent susceptibility to copper in Rhinella arenarum embryos and larvae

Aronzon

Sandoval

Herkovits

et al. 2011

Enviro Toxic and Chemistry

View full text Add to dashboard Cite

Copper toxicity in different embryonic and larval stages of the common South American toad Rhinella arenarum was evaluated by means of continuous and 24-h pulse treatments in 12 different developmental stages. Lethal concentrations (LC) of 10, 50, and 90% of continuous treatment with Cu from early blastula (S.4), complete operculum (S.25), and hind limb bud (S.28) stages were plotted from 24 to 168 h, resulting from S.4 in a 24-h LC50 of 137 µg Cu(2+) /L and a 168-h LC50 of 19.5 µg Cu(2+) /L. This result was in agreement with pulse treatments that showed a high resistance to Cu at blastula and gastrula stages, whereas the organogenic period, between muscular response (S.18) and open mouth (S.21), was very susceptible to this metal. Continuous treatments from S.25 showed no significant differences along exposure time (168-h LC50 = 51 µg Cu(2+) /L), but in the case of S.28 toxicity increased slightly from a 24-h LC50 of 138.6 µg Cu(2+) /L to a 168-h LC50 of 104 µg Cu(2+) /L, pointing out that, although the larval period was significantly more resistant to Cu, there was also a remarkable stage-dependent susceptibility to this metal. Copper teratogenic potential was approximately two, and main adverse effects were reduced body size, axial flexure, microcephaly, acephaly, mouth malformations, agenesis of or underdeveloped gills, agenesis of or underdeveloped tail, and hydropsy. The results are discussed considering Cu toxicity mechanisms, an evolutionary perspective, and environmental protection.

show abstract

Section: Discussionmentioning

confidence: 98%

Stage‐dependent susceptibility to copper in Rhinella arenarum embryos and larvae

Aronzon

Sandoval

Herkovits

et al. 2011

Enviro Toxic and Chemistry

View full text Add to dashboard Cite

show abstract

“…[11,12] It must also be kept in mind that there is an uncertainty factor when laboratory results are extrapolated to field conditions because of the simultaneous influence of a number of environmental and biological factors (bioavailability, toxicokinetics, sensitivity of organisms, etc.). [4] However, direct toxicity test of environmental water sample can provide an integral view on ecotoxicological eff ects of all chemicals coexisting in water as a mixture and has been widely used in safety assessment of water quality. [6,13,14] The study of ecological properties of diff erent organization levels may reveal changes of potential ecological signification that cannot be detected by other analyses.…”

Section: Introductionmentioning

confidence: 99%

“…[2] The ecotoxicity evaluation by means of acute bioassays may bring quick and valuable information. [3,4] However, most of the ecotoxicity test methods were established to measure the toxicity of pure single chemicals and not to be applied to unknown environmental water samples with complex components. Since chemicals are present in environmental water as a complex mixture, their potential ecotoxicological eff ects are much complicated due to their interactions.…”

Section: Introductionmentioning

confidence: 99%

Multiple linear and principal component regressions for modelling ecotoxicity bioassay response

Gomes

Pires

Figueiredo

et al. 2013

Environmental Technology

View full text Add to dashboard Cite

The ecotoxicological response of the living organisms in an aquatic system depends on the physical, chemical and bacteriological variables, as well as the interactions between them. An important challenge to scientists is to understand the interaction and behaviour of factors involved in a multidimensional process such as the ecotoxicological response. With this aim, multiple linear regression (MLR) and principal component regression were applied to the ecotoxicity bioassay response of Chlorella vulgaris and Vibrio fischeri in water collected at seven sites of Leça river during five monitoring campaigns (February, May, June, August and September of 2006). The river water characterization included the analysis of 22 physicochemical and 3 microbiological parameters. The model that best fitted the data was MLR, which shows: (i) a negative correlation with dissolved organic carbon, zinc and manganese, and a positive one with turbidity and arsenic, regarding C. vulgaris toxic response; (ii) a negative correlation with conductivity and turbidity and a positive one with phosphorus, hardness, iron, mercury, arsenic and faecal coliforms, concerning V. fischeri toxic response. This integrated assessment may allow the evaluation of the eff ect of future pollution abatement measures over the water quality of Leça River.

show abstract

“…Among them, the tadpoles of Rhinella arenarum [sin. Bufo arenarum]-an anuran widely distributed in Southern America-have been recommended and widely used as an experimental animal model for aquatic toxicology tests and there is a high amount of information about the biological effects of Cd on them (Ferrari et al 1997(Ferrari et al , 2005Castañé et al 1997).…”

Section: Introductionmentioning

confidence: 98%

Cadmium toxicity in tadpoles of Rhinella arenarum in relation to calcium and humic acids

2011

View full text Add to dashboard Cite

Bioassays were carried out to study the differences in cadmium (Cd) toxicity to premetamorphic tadpoles of Rhinella arenarum, in aqueous solutions with variable contents of calcium in the presence and absence of humic acids, and to analyze the relationship between the free Cd(2+) ion concentrations calculated by chemical modeling and the biological results. The correlation analysis of the free Cd(2+) concentration calculated by chemical speciation and the analytical Cd yielded a direct relationship between the degree of toxicity and the slope value. The lowest slope was obtained from the treatments with lowest free Cd(2+) ion concentration and lowest toxicity, whereas the highest slope was obtained from the most toxic treatment. At comparable concentrations of free Cd(2+), intralarval Cd increased as the Ca in the solution decreased. At equal contents of Ca, in the presence of humic acids, the content of Cd in larvae was higher and the toxicity values lower. The results obtained in this study show that waterborne Ca could offer some protection from metal uptake and accumulation by competitive inhibition in the uptake mechanism that involves active transport via cell membrane. In the systems with humic materials, a certain proportion of the Cd present in the solution was associated to them and thus became less bioavailable.

show abstract

Ecotoxicological assessment for receiving waters with the premetamorphic tadpoles acute assay

Cited by 29 publications

References 20 publications

Stage‐dependent susceptibility to copper in Rhinella arenarum embryos and larvae

Stage‐dependent susceptibility to copper in Rhinella arenarum embryos and larvae

Multiple linear and principal component regressions for modelling ecotoxicity bioassay response

Cadmium toxicity in tadpoles of Rhinella arenarum in relation to calcium and humic acids

Contact Info

Product

Resources

About