Different susceptibility of two aquatic vertebrates (Oncorhynchus mykiss and Bufo arenarum) to azinphos methyl and carbaryl

Ferrari, Alejandro; Anguiano, Olga L.; Soleño, Jimena; Venturino, Andrés; D’Angelo, Alessandra

doi:10.1016/j.cca.2004.11.006

Cited by 28 publications

(24 citation statements)

References 26 publications

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“…The NOEC and EIC 50 values were 500 and 1000 times lower for L. variegatus than for B. glabrata, reflecting that the oligochaetes were much more sensitive organisms. Mean ChE activity was significantly reduced in both organisms within 24 h of exposure, with higher reductions in activity at 48 h. In agreement with studies in other species (Ferrari et al, 2004b), exposure of both organisms to azinphos-methyl for 72 and 96 h, either in static assays or with renewal of the media, resulted in a ChE inhibition not significantly different from that observed at 48 h (data not shown). It is worth noting that we did not observed mortality in any of the experimental conditions assayed, even at concentrations that induced 90% ChE inhibition.…”

Section: Discussionsupporting

confidence: 90%

Inhibition of cholinesterase activity by azinphos-methyl in two freshwater invertebrates: Biomphalaria glabrata and Lumbriculus variegatus

et al. 2006

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Section: Discussionsupporting

confidence: 90%

Inhibition of cholinesterase activity by azinphos-methyl in two freshwater invertebrates: Biomphalaria glabrata and Lumbriculus variegatus

et al. 2006

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“…Previous studies compare the acute and chronic toxicity of five chemicals (carbaryl, copper sulfate, 4-nonylphenol, pentachlorophenol, and permethrin) representing diverse modes of action for 17 aquatic listed species and three surrogate test species [9][10][11]15]. 27,2008 S. Raimondo et al limited in scope in both the range of chemicals and the species evaluated. While these studies indicate that risk assessors can apply surrogate species toxicity data with safety factors to protect endangered species, they are Environ.…”

Section: Introductionmentioning

confidence: 99%

Protectiveness of species sensitivity distribution hazard concentrations for acute toxicity used in endangered species risk assessment

Raimondo

Vivian

Delos

et al. 2008

Enviro Toxic and Chemistry

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A primary objective of threatened and endangered species conservation is to ensure that chemical contaminants and other stressors do not adversely affect listed species. Assessments of the ecological risks of chemical exposures to listed species often rely on the use of surrogate species, safety factors, and species sensitivity distributions (SSDs) of chemical toxicity; however, the protectiveness of these approaches can be uncertain. We comprehensively evaluated the protectiveness of SSD first and fifth percentile hazard concentrations (HC1, HC5) relative to the application of safety factors using 68 SSDs generated from 1,482 acute (lethal concentration of 50%, or LC50) toxicity records for 291 species, including 24 endangered species (20 fish, four mussels). The SSD HC5s and HCls were lower than 97 and 99.5% of all endangered species mean acute LC50s, respectively. The HC5s were significantly less than the concentrations derived from applying safety factors of 5 and 10 to rainbow trout (Oncorhynchus mykiss) toxicity data, and the HCls were generally lower than the concentrations derived from a safety factor of 100 applied to rainbow trout toxicity values. Comparison of relative sensitivity (SSD percentiles) of broad taxonomic groups showed that crustaceans were generally the most sensitive taxa and taxa sensitivity was related to chemical mechanism of action. Comparison of relative sensitivity of narrow fish taxonomic groups showed that standard test fish species were generally less sensitive than salmonids and listed fish. We recommend the use of SSDs as a distribution-based risk assessment approach that is generally protective of listed species.

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“…A review of literature indicates that biochemical changes in fish under pesticide exposure were extensively reported [7][8][9]. However, it is relevant that data on the effects of the carbaryl using aquatic organisms as experimental models is not well-established [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Biochemical and histological hepatic changes of Nile tilapia Oreochromis niloticus exposed to carbaryl

Matos

́nhas-Fernandes

Peixoto

et al. 2007

Pesticide Biochemistry and Physiology

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The purpose of this study was to evaluate biochemical and morphological responses induced by carbaryl in the liver of Nile tilapia (Oreochromis niloticus) exposed during 21 days to sublethal concentrations (0.25 and 0.5 mg L À1 ), testing also recover for 14 days in clean water, after 14 days exposure. The activities of the following enzymes were measured: superoxide dismutase (SOD), catalase (CAT), glutathione S-transferase (GST), glutathione reductase (GR), and reduced (GSH) and oxidized glutathione (GSSG). Globally, our data showed that exposure to carbaryl decreased the SOD, CAT, GR, and GST activities, except for the SOD and GST activities after 14 days exposure to 0.25 mg L À1. In contrast, after 14 days exposure the GR activity of the hepatic tissue from carbaryl-treated fish showed significant elevation in relation to the control. When fish were left to recover, a positive response was seen in the GSH and GSSG contents. The results of the recovery group suggest that the toxicity produced by carbaryl is reversible to some extent within 15 days. The liver histological analysis showed differences between fish concerning the cellular vacuolization degree (VD) of the hepatocytes. In fish exposed to carbaryl it was observed an increasing hepatocellular basophilia. No other histological alterations were observed when fish was exposed to carbaryl, except a few necrotic foci at day 7. The sections stained with PAS reaction showed that the vacuolization was always not due to glycogen deposits, thus suggesting lipid accumulation. The combined increased basophilia and glycogen depletion is a common, although non-specific, liver response to many toxicants. In short, this work shows a relation between histological and biochemical changes in liver and carbaryl exposure. The effects of carbaryl were observed at different concentrations.

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Different susceptibility of two aquatic vertebrates (Oncorhynchus mykiss and Bufo arenarum) to azinphos methyl and carbaryl

Cited by 28 publications

References 26 publications

Inhibition of cholinesterase activity by azinphos-methyl in two freshwater invertebrates: Biomphalaria glabrata and Lumbriculus variegatus

Inhibition of cholinesterase activity by azinphos-methyl in two freshwater invertebrates: Biomphalaria glabrata and Lumbriculus variegatus

Protectiveness of species sensitivity distribution hazard concentrations for acute toxicity used in endangered species risk assessment

Biochemical and histological hepatic changes of Nile tilapia Oreochromis niloticus exposed to carbaryl

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