Combined effects of temperature and salinity on the demographic response of Proales similis (Beauchamp, 1907) and Brachionus plicatilis (Müller, 1786) (Rotifera) to mercury

Rebolledo, Uriel Arreguin; Nandini, S.; Escobar-Sánchez, Ofelia

doi:10.1016/j.chemosphere.2018.03.111

Cited by 18 publications

(6 citation statements)

References 41 publications

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“…Several studies have found that sublethal concentrations of dieldrin, polyfluorinated compounds, and rifampicin significantly prolonged T of B. calyciflorus [23,26,31], while thiophanate-methyl, polybrominated diphenyl ethers (BDE-47), and mercury significantly shortened T of rotifers [17,30,32].…”

Section: Effects Of Ddt and Dicofol On Life Table Demographic Parametersmentioning

confidence: 99%

Effects of DDT and Dicofol on Life Table Demography of the Freshwater Rotifer <i>Brachionus calyciflorus</i> Pallas

Xu¹,

Xi²,

Wang³

2020

Pol. J. Environ. Stud.

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Dichlorodiphenyltrichloroethanes (DDTs) are effective pesticides and have been widely used to control agricultural, animal and human insect diseases since the Second World War. In China, the total production of DDTs reached 270,000 tons from 1960 to 1980 [1]. DDTs are typical persistent organic pollutants (POPs). Due to their chronic toxicity, environmental persistence, and bioaccumulative abilities, DDTs have raised great environmental concerns in past decades [2]. Although

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Section: Effects Of Ddt and Dicofol On Life Table Demographic Parametersmentioning

confidence: 99%

Effects of DDT and Dicofol on Life Table Demography of the Freshwater Rotifer <i>Brachionus calyciflorus</i> Pallas

Xu¹,

Xi²,

Wang³

2020

Pol. J. Environ. Stud.

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“…The magnetic properties of the Mag-P(CMMA-EDMA) and Mag-P(CMMA-EDMA)-Th particles were measured using a VSM (Table 2). The coercivity and magnetic remanence were negligible on the limit of sensitivity and accuracy of the measurement and were 1–2 orders lower than the values reported for 10-nm maghemite particles produced by a plasma technique 38 or coprecipitation in air 39 . This can be explained by the rather thin layer of magnetic iron oxide nanoparticles on the particle surface.…”

Section: Resultsmentioning

confidence: 54%

Peroxidase-like activity of magnetic poly(glycidyl methacrylate-co-ethylene dimethacrylate) particles

Zasońska

Šálek

Procházková

et al. 2019

Sci Rep

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Poly(glycidyl methacrylate) (PGMA) is prone to modifications with different functional groups, magnetic fluids or direct coupling with biological molecules. The purpose of this research was to synthesize new magnetically responsive particles with peroxidase-like activity. Poly(glycidyl methacrylate-co-ethylene dimethacrylate) [P(GMA-EDMA)] particles containing carboxyl groups were obtained by emulsifier-free emulsion polymerization and hydrolysis and oxidation of PGMA with KMnO4, resulting in poly(carboxymethyl methacrylate-co-ethylene dimethacrylate) [P(CMMA-EDMA)] particles. Thionine (Th) was also attached to the particles [(P(CMMA-EDMA)-Th] via EDC/NHS chemistry to observe its effect on electron transfer during the oxidation reaction. Finally, the particles were coated with a nitric acid-stabilized ferrofluid in methanol. The resulting magnetic particles were characterized by several methods, including scanning and transmission electron microscopy, X-ray photoelectron spectroscopy, and vibrating sample magnetometry. The effect of EDMA on the P(CMMA-EDMA) particle size and size distribution was investigated; the particle size changed from 300 to 340 nm, and the particles were monodispersed with a saturation magnetization of 11 Am2/kg. Finally, the effects of temperature and pH on the peroxidase-like activity of the magnetic P(CMMA-EDMA) and P(CMMA-EDMA)-Th particles were investigated. The particles, which exhibited a high activity at pH 4–6 and at ∼37 °C, represent a highly sensitive sensor component potentially useful in enzyme-based immunoassays.

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“…Rebolledo et al explored mercury toxicity to B. plicatilis and P. similis . They reported significant reproductive effects at 2 μg mercury L −1 in P. similis using life table analysis.…”

Section: Discussionmentioning

confidence: 99%

“…The biology of this rotifer is being investigated because of its usefulness in aquaculture . As a marine rotifer, Proales also has value in ecotoxicology for toxicity assessment . In recognition of this, we have developed rapid toxicity tests based on hatching of DE to provide animals to initiate tests.…”

Section: Introductionmentioning

confidence: 99%

Using Proales similis (Rotifera) for toxicity assessment in marine waters

Snell

Johnston

Matthews

et al. 2019

Environmental Toxicology

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There is a need to develop more animal species for assessing toxicity in marine environments. Cyst‐based toxicity tests using invertebrates are especially fast, technically simple, cost‐effective, and sensitive to a variety of toxicants. Over the past 30 years, a variety of toxicity endpoints have been measured using the marine rotifer Brachionus plicatilis hatched from cysts, including mortality, reproduction, ingestion, swimming, enzyme activity, and gene expression. A consensus has developed that the most ecologically relevant toxicity measurements should be made using more than one species. Furthermore, it has been noted that the rotifer species toxicant sensitivity distribution is much broader than which endpoint is measured. This implies that toxicity should be measured with the simplest, fastest, least expensive test available on as many species as feasible. If a battery of test species is to be used to estimate toxicity, diapause egg‐based toxicity tests that do not require culturing of test animals will be key. In this paper, we describe how diapause eggs of a new marine rotifer, Proales similis, can be produced, stored and hatched under controlled conditions to produce animals for toxicity tests. Methods are described for quantifying the toxicity of copper, mercury and cadmium based on mortality, ingestion, reproduction, and diapause egg hatching endpoints. We found that reproduction and ingestion endpoints were generally more sensitive to the metals than mortality or diapause egg hatching. When the copper sensitivity of P. similis was compared to Brachionus manjavacas and B. plicatilis using an ingestion test, similar EC50s were observed. In contrast, the B. rotundiformis ingestion EC50 for copper was about 4× more sensitive. Although diapause egg hatching was not the most sensitive endpoint, it is the most ecologically relevant for assessing sediment toxicity. Our discovery of diapausing eggs in the P. similis life cycle has created a conundrum. We have not observed males or sex in P. similis populations, which is a direct contradiction to the orthodox view of the monogonont rotifer life cycle. Work is needed to clarify how diapause egg production is accomplished by P. similis and whether sexual reproduction is involved.

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Combined effects of temperature and salinity on the demographic response of Proales similis (Beauchamp, 1907) and Brachionus plicatilis (Müller, 1786) (Rotifera) to mercury

Cited by 18 publications

References 41 publications

Effects of DDT and Dicofol on Life Table Demography of the Freshwater Rotifer <i>Brachionus calyciflorus</i> Pallas

Effects of DDT and Dicofol on Life Table Demography of the Freshwater Rotifer <i>Brachionus calyciflorus</i> Pallas

Peroxidase-like activity of magnetic poly(glycidyl methacrylate-co-ethylene dimethacrylate) particles

Using Proales similis (Rotifera) for toxicity assessment in marine waters

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