Sediment toxicity testing with the freshwater amphipod Hyalella azteca: Relevance and application

Borgmann, Uwe; Grapentine, Lee; Norwood, W. P.; Bird, Graham; Dixon, D. George; Lindeman, Dorothy

doi:10.1016/j.chemosphere.2005.04.011

Cited by 26 publications

(13 citation statements)

References 12 publications

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“…The LC50 from the most resistant sub‐population of amphipods collected at F. Oro was approximately 200‐ and 900‐fold higher than both the susceptible subpopu‐lation from F. Oro and the population from Los Barreales, respectively. The observed differences in toxicity to the insecticide could be related to a higher AzMe pressure on the benthic amphipods [33–35].…”

Section: Resultsmentioning

confidence: 99%

Enhanced esterase activity and resistance to azinphosmethyl in target and nontarget organisms

Anguiano

Ferrari

Soleño

et al. 2008

Enviro Toxic and Chemistry

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The organophosphorous compound azinphosmethyl (AzMe) is applied extensively in northern Patagonia (southern Argentina) to manage codling moths (Cydia pomonella). This area is irrigated by fast-flowing channels that provide a favorable habitat for many species, including amphipods (Hyalella curvispina) and a field-mixed population of black flies (Simulium bonaerense, Simulium wolffhuegeli, and Simulium nigristrigatum). In the present study, AzMe susceptibility and carboxylesterase (CarbE) activity from both insecticide-exposed and nonexposed field populations were studied. The median lethal dose determined in codling moths from an insecticide-treated orchard was significantly higher (3.48 microg/insect) than that observed in those from an untreated orchard (0.69 microg/insect). Similarly, the median lethal concentration (LC50) determined in black flies collected from the treated area (0.021 mg/L) was significantly higher than that recorded in those from the untreated site (0.011 mg/L). For amphipods, both a subpopulation susceptible to AzMe (LC50, 1.83 microg/L) and a resistant one (LC50, 390 microg/L) were found in the treated area. Both subpopulations were more resistant to AzMe than the population from the untreated site (LC50, 0.43 microg/L). Significant differences (p < 0.001) in CarbE activities were observed between populations from pesticide-treated and untreated areas. Mean activities +/- standard deviation from treated and untreated sites were 0.21 +/- 0.16 and 0.016 +/- 0.008 micromol/min/mg protein, respectively, for codling moths; 2.17 +/- 1.71 and 0.81 +/- 0.35 micromol/min/mg protein, respectively, for black flies; and 0.27 +/- 0.10 and 0.14 +/- 0.07 micromol/min/mg protein, respectively, for amphipods. The results suggest that enhanced CarbE activity is one of the mechanisms that provide AzMe resistance in H. curvispina, Simulium spp., and C. pomonella populations from the insecticide-treated areas.

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Section: Resultsmentioning

confidence: 99%

Enhanced esterase activity and resistance to azinphosmethyl in target and nontarget organisms

Anguiano

Ferrari

Soleño

et al. 2008

Enviro Toxic and Chemistry

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“…azteca (fresh water shrimp) shown in Figure a, is a sensitive organism to biotic and abiotic variables, and a number of studies have been conducted on H . azteca to investigate sediment and aquatic toxicities . D .…”

Section: Sample Preperation Handling and Spinningmentioning

confidence: 99%

In vivo comprehensive multiphase NMR

Mobarhan

Soong

Lane

et al. 2019

Magnetic Reson in Chemistry

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Traditionally, due to different hardware requirements, nuclear magnetic resonance (NMR) has developed as two separate fields: one dealing with solids, and one with solutions. Comprehensive multiphase (CMP) NMR combines all electronics and hardware (magic angle spinning [MAS], gradients, high power Radio Frequency (RF) handling, lock, susceptibility matching) into a universal probe that permits a comprehensive study of all phases (i.e., liquid, gel‐like, semisolid, and solid), in intact samples. When applied in vivo, it provides unique insight into the wide array of bonds in a living system from the most mobile liquids (blood, fluids) through gels (muscle, tissues) to the most rigid (exoskeleton, shell). In this tutorial, the practical aspects of in vivo CMP NMR are discussed including: handling the organisms, rotor preparation, sample spinning, water suppression, editing experiments, and finishes with a brief look at the potential of other heteronuclei (2H, 15N, 19F, 31P) for in vivo research. The tutorial is aimed as a general resource for researchers interested in developing and applying MAS‐based approaches to living organisms. Although the focus here is CMP NMR, many of the approaches can be adapted (or directly applied) using conventional high‐resolution magic angle spinning, and in some cases, even standard solid‐state NMR probes.

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“…Most amphipoda have some similar life history traits to H. azteca (e.g., benthic detritivores that are iteroparous with an annual life cycle and a seasonal breeding window). ( 34 ) H. azteca are often sensitive to a variety of substances, ( 83 ) a trait that may be shared with other less often tested amphipoda. In the case of cadmium, another amphipod genus ( Gammarus ) was ranked the third most sensitive of 21 genera.…”

Section: Discussionmentioning

confidence: 99%

Relevance of Risk Predictions Derived from a Chronic Species Sensitivity Distribution with Cadmium to Aquatic Populations and Ecosystems

Mebane

2010

Risk Analysis

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Criteria to protect aquatic life are intended to protect diverse ecosystems, but in practice are usually developed from compilations of single-species toxicity tests using standard test organisms that were tested in laboratory environments. Species sensitivity distributions (SSDs) developed from these compilations are extrapolated to set aquatic ecosystem criteria. The protectiveness of the approach was critically reviewed with a chronic SSD for cadmium comprising 27 species within 21 genera. Within the data set, one genus had lower cadmium effects concentrations than the SSD fifth percentile-based criterion, so in theory this genus, the amphipod Hyalella, could be lost or at least allowed some level of harm by this criteria approach. However, population matrix modeling projected only slightly increased extinction risks for a temperate Hyalella population under scenarios similar to the SSD fifth percentile criterion. The criterion value was further compared to cadmium effects concentrations in ecosystem experiments and field studies. Generally, few adverse effects were inferred from ecosystem experiments at concentrations less than the SSD fifth percentile criterion. Exceptions were behavioral impairments in simplified food web studies. No adverse effects were apparent in field studies under conditions that seldom exceeded the criterion. At concentrations greater than the SSD fifth percentile, the magnitudes of adverse effects in the field studies were roughly proportional to the laboratory-based fraction of species with adverse effects in the SSD. Overall, the modeling and field validation comparisons of the chronic criterion values generally supported the relevance and protectiveness of the SSD fifth percentile approach with cadmium.

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Sediment toxicity testing with the freshwater amphipod Hyalella azteca: Relevance and application

Cited by 26 publications

References 12 publications

Enhanced esterase activity and resistance to azinphosmethyl in target and nontarget organisms

Enhanced esterase activity and resistance to azinphosmethyl in target and nontarget organisms

In vivo comprehensive multiphase NMR

Relevance of Risk Predictions Derived from a Chronic Species Sensitivity Distribution with Cadmium to Aquatic Populations and Ecosystems

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