Efeito Da Presença De Sedimento Na Toxicidade Aguda Do Sulfato De Cobre E Do Triclorfon Para Três Espécies De Daphnia

Arauco, Luis Ricardo Romero; Cruz, Claudineida; Neto, Joaquim Gonçalves Machado

doi:10.5380/pes.v15i0.4470

Cited by 14 publications

(19 citation statements)

References 21 publications

(1 reference statement)

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“…DFB and temephos are classified as extremely toxic to D. magna in the presence and in the absence of sediment (<0.1 mg/L) ( Figure 1 and Table 2). These findings are in agreement with Arauco et al (2005) for trichlorfon in the absence of sediment to this same species.…”

Section: Acute Toxicitysupporting

confidence: 93%

“…al., 2005). In contrast to temephos analysis, the results of Arauco et al (2005) showed high adsorption of trichlorfon in sediment, as evidenced by the large differences between the values of EC 50 with and without the sediment. The 48-h EC 50 to D. magna was also calculated in the presence of DFB.…”

Section: Acute Toxicitycontrasting

confidence: 71%

“…The results with temephos may be compared with those of the insecticide trichlorfon. Based on the calculated values of EC 50 to three species of Daphnia, with and without sediment, Arauco et al (2005) classified trichlorfon in the category of high risk of environmental toxicity to these organisms.…”

Section: Environmental Toxicity Riskmentioning

confidence: 99%

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Ecotoxicity and Environmental Risk Assessment of Larvicides Used in the Control ofAedes aegyptitoDaphnia magna(Crustacea, Cladocera)

Abe

Coleone

Machado

et al. 2014

Journal of Toxicology and Environmental Health, Part A

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Dengue transmitted by mosquitoes of the genus Aedes, species aegypti, is a major public health concern in Brazil. The chemical control of the mosquito larvae has been performed with the larvicide temephos since 1967. However, vector resistance was reported to temephos in several Brazilian states, and the Ministry of Health ordered the replacement of this larvicide by diflubenzuron (DFB), an inhibitor of chitin synthesis. Both insecticides are diluted in water with larvae and are able to reach aquatic environments in which they subsequently adversely damage nontarget organisms. The aims of this study were to (1) determine the acute toxicity (EC50) and environmental risk (RQ) of DFB and temephos to the microcrustacean Daphnia magna, and (2) evaluate the chronic toxicity (no-observed-effect concentration [NOEC] and lowest-observed-effect concentration [LOEC]) of these larvicides to D. magna. The experiments were performed according to a completely randomized design. The estimated 48-h EC50 of temephos was 0.15 μg/L (lower limit = 0.1 and upper limit = 0.2 μg/L) and the 48-h EC50 of DFB was 0.06 μg/L (lower limit = 0.03 and upper limit = 0.1 μg/L). RQ values were 4.166.7 to DFB and 6.666.6 to temephos. NOEC and LOEC values were respectively 2.5 and 5 ng/L for DFB, and respectively 6.2 and 12.5 ng/L for temephos. Thus, temephos and DFB are classified as highly toxic to Daphnia magna and pose a high environmental risk to this species. Mortality of D. magna was observed at concentrations lower than those used in the field to control A. aegypti larvae.

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Section: Acute Toxicitysupporting

confidence: 93%

Section: Acute Toxicitycontrasting

confidence: 71%

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Ecotoxicity and Environmental Risk Assessment of Larvicides Used in the Control ofAedes aegyptitoDaphnia magna(Crustacea, Cladocera)

Abe

Coleone

Machado

et al. 2014

Journal of Toxicology and Environmental Health, Part A

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show abstract

“…Os critérios de seleção de organismos-testes devem considerar a frequência de disponibilidade, facilidade de cultivo em laboratório, hábitos alimentares, valor econômico e espécies que ocorrem nas regiões impactadas (Rand & Petrocelli, 1985) e nativas (Arauco et al, 2005).…”

Section: Introductionunclassified

Sensibilidade de Peixes Neotropicais ao Dicromato de Potássio

Cruz¹,

Cubo²,

Gomes³

et al. 2008

JBSE

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RESUMO O objetivo deste trabalho foi avaliar a sensibilidade de Piaractus mesopotamicus (pacu), Hyphessobrycon eques (mato-grosso) e Phallocerus caudimaculatus (guaru) ao dicromato de potássio. A CL(I)50;96h para P. mesopotamicus foi de 144,50 ± 19,67 mg L -1 ; para H. eques, de 130,79 ± 10,02 mg L -1 ; e para P. caudimaculatus, de 154,39 ± 6,72 mg L -1 . As três espécies apresentam potencial ABSTRACT Sensibility of neotropical fishes to dichromate of potassium The objective of this study was to evaluate the sensitivity of potassium dichromate to Piaractus mesopotamicus (pacu), Hyphessobrycon eques (mato-grosso) e Phallocerus caudimaculatus (guaru). The LC(I)50;96h for the P. mesopotamicus was 144.50 ± 19.67 mg L -1 ; for the H. Eques, 130.79 ± 10.02 mg L -1 ; and for the P. Caudimaculatus, of 154.39 ± 6.72 mg L -1 .The three species showed potencial for use as organims-tests, however, the H. eques met the criteria for best selection.

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“…Feed was provided using a suspension of Scenedesmus subspicatus at the concentration of 5 × 10 6 cells per organism per day, fermented ration for fish, yeast and a vitamin complex of B1 (7 mg/L), B2 (7 mg)/L, B6 (5 mg/L), B12 (33 mg/L) and H (0.01 mg/L). Immobilized organisms which were incapable of swimming for 15 sec were counted after 24 h of exposure (Arauco et al 2005). As a reference substance, it was utilized potassium dichromate (Wako Pure Chemical Industries Ltd.) with EC 50 value of 1.42μg/mL.…”

Section: Acute Toxicity Upon Daphnia Magnamentioning

confidence: 99%

Larvicidal activity of the water extract of Moringa oleifera seeds against Aedes aegypti and its toxicity upon laboratory animals

Ferreira

Carvalho

Farias

et al. 2009

An. Acad. Bras. Ciênc.

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In this work, biological effects of the water extract of Moringa oleifera seeds (WEMOS) were assessed on eggs and 3 rd instar larvae of Aedes aegypti and on its toxicity upon laboratory animals (Daphnia magna, mice and rats). Crude WEMOS showed a LC 50 value of 1260μg/mL, causing 99.2 ± 2.9% larvae mortality within 24 h at 5200μg/mL, though this larvicidal activity has been lost completely at 80 • C/10 min. WEMOS did not demonstrate capacity to prevent egg hatching. After extensive dialyses of the crude WEMOS into water-soluble dialyzable (DF) and nondyalizable (NDF) fractions, only DF maintained its efficacy to kill larvae. Acute toxicity evaluations on daphnids (EC 50 of 188.7μg/mL) and mice (LD 50 of 446.5 mg/kg body weight) pointed out to low toxicity. Despite the thymus hypertrophy, WEMOS revealed to be harmless in orally and subacutely-treated rats. In conclusion, WEMOS has thermostable bioactive compounds against Ae. aegypti larvae with apparent molecular mass lower than 12 kDa and moderately toxic potential.

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Efeito Da Presença De Sedimento Na Toxicidade Aguda Do Sulfato De Cobre E Do Triclorfon Para Três Espécies De Daphnia

Cited by 14 publications

References 21 publications

Ecotoxicity and Environmental Risk Assessment of Larvicides Used in the Control ofAedes aegyptitoDaphnia magna(Crustacea, Cladocera)

Ecotoxicity and Environmental Risk Assessment of Larvicides Used in the Control ofAedes aegyptitoDaphnia magna(Crustacea, Cladocera)

Sensibilidade de Peixes Neotropicais ao Dicromato de Potássio

Larvicidal activity of the water extract of Moringa oleifera seeds against Aedes aegypti and its toxicity upon laboratory animals

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