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Aquat Toxicol 2020 May 16;224:105517. Epub 2020 May 16.

Department of Biology, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla, Thailand; Gut Biology and Microbiota Research Unit, Prince of Songkla University, Hat Yai, Songkhla, Thailand. Electronic address:

Temperature affects physiological processes in organisms and the toxicity of chemicals. The widespread industrial use of ZnO causes contamination in aquatic ecosystems. This study aimed to investigate the chronic toxicity of ZnO at different temperatures using Daphnia magna as a model organism. Read More

Aquat Toxicol 2020 May 13;224:105516. Epub 2020 May 13.

College of Animal Sciences (College of Bee Sciences), Fujian Agriculture and Forestry University, Fuzhou 350002, PR China; Fujian Key Laboratory of Traditional Chinese Veterinary Medicine and Animal Health, Fujian Agriculture and Forestry University, Fuzhou 350002, PR China.

Summer outbreaks of the hepatobiliary syndrome in fish impose a heavy burden on aquaculture in China. Curcumin is a polyphenol with antioxidant activity that has been used to protect the health of fish livers, but the mechanism underlying its protective effect is unclear. In this study, an in vitro model of hepatocyte oxidative damage in Oreochromis niloticus was established using HO. Read More

Aquat Toxicol 2020 May 18;224:105502. Epub 2020 May 18.

Environmental Biogeochemistry and Ecotoxicology, Department F.-A. Forel for Environmental and Aquatic Sciences, School of Earth and Environmental Sciences, Faculty of Science, and Institute for Environmental Sciences, University of Geneva, Uni Carl Vogt, 66, Boulevard Carl-Vogt, CH-1211 Genève 4, Switzerland. Electronic address:

The present study examined the effect of titanium dioxide nanoparticles (nanoTiO) and mercury (Hg) compounds on the green alga, Chlamydomonas reinhardtii. Mixtures containing nanoTiO of different primary sizes (5 nm, 15 nm and 20 nm), inorganic Hg (IHg) or monomethyl Hg (CHHg, MeHg) were studied and compared with individual treatments. Oxidative stress and membrane damage were examined. Read More

Aquat Toxicol 2020 May 19;224:105520. Epub 2020 May 19.

Department of Chemistry, City University of Hong Kong, Hong Kong, PR China; State Key Laboratory of Marine Pollution, City University of Hong Kong, Hong Kong, PR China. Electronic address:

Hypoxia, a low environmental oxygen level, is a common problem in the ocean globally. Hypoxia has been known to cause disruption to the endocrine system of marine organisms in both laboratory and field studies. Our previous studies have demonstrated the sex-specific response to hypoxia in the neural and reproductive systems of marine fish. Read More

Aquat Toxicol 2020 May 23;224:105518. Epub 2020 May 23.

Department of Environmental Sciences, University of California Riverside, Riverside, CA, USA; Institute of Environmental Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China.

An increase in urban and agricultural application of pyrethroid insecticides in the San Francisco Bay Estuary and Sacramento San Joaquin Delta has raised concern for the populations of several salmonids, including Chinook salmon (Oncorhynchus tshawytscha). Bifenthrin, a type I pyrethroid, is among the most frequently detected pyrethroids in the Bay-Delta watershed, with surface water concentrations often exceeding chronic toxicity thresholds for several invertebrate and fish species. To better understand the mechanisms of bifenthrin-induced neurotoxicity, juvenile Chinook salmon were exposed to concentrations of bifenthrin previously measured in the Delta. Read More

Aquat Toxicol 2020 May 15;224:105504. Epub 2020 May 15.

Department of Crop and Soil Sciences, University of Georgia, Griffin, GA 30223, United States.

Due to their unique structure and properties, carbon nanotubes (CNTs) released into the aquatic environment can potentially influence the behavior of other coexisting pollutants, thereby altering their toxicity to aquatic organisms. In this study, the toxicities of multi-walled CNTs and three heavy metals, copper (Cu), cadmium (Cd) and zinc (Zn) were determined individually. Following this, CNTs with low concentrations (1 and 5 mg/L) were co-exposed with Cu, Cd or Zn to the microalgae Scenedesmus obliquus, to investigate the effects and underlying mechanisms of CNTs on metal toxicity. Read More

Aquat Toxicol 2020 May 14:105500. Epub 2020 May 14.

State Key Laboratory of Crop Biology, Taian, China; College of Horticulture Science and Engineering, Shandong Agricultural University, Taian, China. Electronic address:

Aquat Toxicol 2020 May 12;224:105503. Epub 2020 May 12.

Chongqing Key Laboratory of Animal Biology, College of Life Sciences, Chongqing Normal University, Chongqing 401331, China. Electronic address:

Tributyltin (TBT) was reported to affect sexual behavior and gametogenesis in fish. However, the modes of action involved are largely unclear. In order to elucidate the toxicological mechanisms of TBT in reproduction, zebrafish (Danio rerio) males were exposed to TBT at concentrations of 100 and 500 ng/L for 28 days. Read More

Aquat Toxicol 2020 May 11;224:105494. Epub 2020 May 11.

Animal Production Department, Faculty of Agriculture, Zagazig University, Zagazig 44511, Egypt.

Little is known about the impacts of dietary exposure to inorganic mercury (Hg) for a long duration on the health indicators, growth, and disease resistance in Oreochromis niloticus. Accordingly, the current study was designed to assess the effects of Hg contaminated diets on blood biochemistry, growth, chemical composition, Hg bioaccumulation in the tissues, histopathology of liver and head kidneys, and disease resistance to Aeromonas hydrophila of O. niloticus. Read More

Aquat Toxicol 2020 May 3;224:105480. Epub 2020 May 3.

National Engineering Research Center of Marine Facilities Aquaculture, Marine Science and Technology College, Zhejiang Ocean University, Zhoushan, 316022, China. Electronic address:

The calanoid copepod, Acartia tonsa, is relatively sensitive to marine pollution. Glutathione S-transferase (GST) multifunctional enzyme, as a biomarker, play an important role in detoxification metabolism of exogenous substances. In the present study, GST-theta and GST-mu class homology genes (designated as AtGSTT1 and AtGSTM2) were identified and characterized from A. Read More

Aquat Toxicol 2020 May 8;224:105479. Epub 2020 May 8.

Fisheries Science Institute, Chonnam National University, Yeosu, 59626, South Korea; Faculty of Marine Technology, Chonnam National University, Yeosu, 550-749, South Korea. Electronic address:

Lead (Pb) is a toxic environmental pollutant that is frequently present in effluents from urban, mining, and industrial sources. The combinatorial effects of heavy metal exposure and temperature in aquatic organisms have received considerable attention as heat stress occurs simultaneously in conjunction with several contaminants in a natural environment. In this study, we examined the potential effects of Pb exposure in conditions of thermal stress (34 °C) in zebrafish (Danio rerio) embryos. Read More

Aquat Toxicol 2020 May 1;224:105499. Epub 2020 May 1.

Unité METO (Modèles pour l'Ecotoxicologie et la Toxicologie), UMR-I 02 SEBIO, INERIS, 60550, Verneuil en Halatte, France. Electronic address:

Pharmaceutical substances are ubiquitous in the aquatic environment and their concentration levels typically range from ng/L up to several μg/L. Furthermore, as those compounds are designed to be highly biologically active, assessing their impacts on non-target organisms is important. Here, we conducted a mesocosm experiment testing a mixture of five pharmaceuticals (diclofenac, carbamazepine, irbesartan, acetaminophen and naproxen) on fish, three-spined stickleback (Gasterosteus aculeatus). Read More

Aquat Toxicol 2020 May 1;224:105483. Epub 2020 May 1.

College of Life and Environmental Sciences, University of Exeter, Exeter, EX4 4QD, UK. Electronic address:

The potential environmental impacts of chemical exposures on wildlife are of growing concern. Freshwater ecosystems are vulnerable to chemical effects and wildlife populations, including fish, can be exposed to concentrations known to cause adverse effects at the individual level. Wild fish populations are also often subjected to numerous other stressors simultaneously which in temperate climates often include sustained periods of food limitation. Read More

Aquat Toxicol 2020 Apr 27;224:105493. Epub 2020 Apr 27.

Department of Forensic Medicine and Toxicology, Faculty of Veterinary Medicine, Zagazig University, 4511, Egypt.

Currently, the contamination of water with different insecticides like profenofos (PFF) is a critical concern in the aquatic ecosystem. There are limited studies available on the negative impacts of PFF on common carp fish (Cyprinus carpio L.). Read More

Aquat Toxicol 2020 May 1;224:105496. Epub 2020 May 1.

Hunan Provincial Key Laboratory of Environmental Catalysis & Waste Regeneration, College of Materials and Chemical Engineering, Hunan Institute of Engineering, Xiangtan, Hunan, 411104, China. Electronic address:

Predicting the toxicity of organic toxicants to aquatic life through chemometric approach is challenging area. In this paper, a six-descriptor quantitative structure-activity/toxicity relationship (QSAR/QSTR) model was successfully developed for the toxicity pEC of organic chemicals against Pseudokirchneriella subcapitata, by applying support vector machine (SVM) together with genetic algorithm. A sufficiently large data set consisting of 334 organic chemicals was randomly divided into a training set (167 compounds) and a test set (167 compounds) with a ratio of 1:1. Read More

Aquat Toxicol 2020 May 1;224:105498. Epub 2020 May 1.

Department of Biotechnology, Motilal Nehru National Institute of Technology, Allahabad, 211004, India. Electronic address:

The current study focuses on the ecotoxicity of cobalt oxide nanoparticles (CoO NPs) in the aquatic environment towards freshwater microalgae, Chlorella minutissima. The interaction of CoO NPs with microalgae shows the growth suppressing effect. The 72 h EC (effective concentration of a chemical having 50% of its impact) values of CoO NPs for C. Read More

Aquat Toxicol 2020 Apr 30:105501. Epub 2020 Apr 30.

Personal Care Products Council, Washington DC, USA.

Aquat Toxicol 2020 May 1;224:105497. Epub 2020 May 1.

School of Life Science, East China Normal University, Shanghai 200241, China; State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200241, China. Electronic address:

Previous research has identified microplastics as new environmental pollutants that are widely distributed in a variety of environments, including aquaculture environments. However, the potential hazard of microplastics to aquaculture animals, especially toward lipid metabolism involved with the survival and growth of aquatic animal, has not yet been investigated. In the present study, redclaw crayfish (Cherax quadricarinatus) were exposed to different concentrations of 200 nm-sized polystyrene microspheres (0, 0. Read More

Aquat Toxicol 2020 Apr 27;224:105484. Epub 2020 Apr 27.

Programa de Pós-graduação em Ecologia e Recursos Naturias, Laboratório de Bioensaios e Modelagem Matemática, Departamento de Hidrobiologia, Universidade Federal de São Carlos - UFSCAR, São Carlos, SP, Brazil.

One of the consequences of global mining is the exposure of metals into the environment, caused by the rupture of tailings dams. Excess of metals, such as aluminum (Al) and manganese (Mn) can cause serious damage to fauna and flora. The presence of these metals, associated with the temperature increase that occurs nowadays can potentially increase biochemical and metabolic rates in plant tissues and may affect growth. Read More

Aquat Toxicol 2020 Apr 27;224:105481. Epub 2020 Apr 27.

Bren School of Environmental Science and Management, University of California, Santa Barbara, CA, 93106, United States. Electronic address:

Modern nano-engineered pesticides have great promise for agriculture due to their extended, low dose release profiles that are intended to increase effectiveness but reduce environmental harm. Whether nanopesticides, including copper (Cu) formulations, cause reduced levels of toxicity to non-target aquatic organisms is unclear but important to assess. Predicting how aquatic species respond to incidental exposure to Cu-based nanopesticides is challenging because of the expected very low concentrations in the environment, and the two forms of exposure that may occur, namely to Cu ions and Cu nanoparticles. Read More

Aquat Toxicol 2020 Jun 24;223:105482. Epub 2020 Apr 24.

University of Bordeaux, EPOC, UMR 5805, Arcachon, France; CNRS, EPOC, UMR 5805, Talence, France. Electronic address:

The use of online remote control for 24/7 behavioural monitoring can play a key role in estimating the environmental status of aquatic ecosystems. Recording the valve activity of bivalve molluscs is a relevant approach in this context. However, a clear understanding of the underlying disturbances associated with behaviour is a key step. Read More

Aquat Toxicol 2020 Jun 24;223:105495. Epub 2020 Apr 24.

Department of Environmental Health Engineering, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran; Environment Research Center, Research Institute for Primordial Prevention of Non-Communicable Disease, Isfahan University of Medical Sciences, Isfahan, Iran. Electronic address:

Platinum-based antineoplastic drugs (PBADs) enter the environment via hospital and municipal wastes as reactive and highly toxic molecules. Chlorella vulgaris is a freshwater microalgae and is used as an excellent aquatic model for toxicity assessment. In the present study, the toxicity of PBADs to C. Read More

Aquat Toxicol 2020 Jun 22;223:105492. Epub 2020 Apr 22.

National Engineering Research Center of Marine Facilities Aquaculture, Zhejiang Ocean University, Zhoushan, 316022, PR China. Electronic address:

In the present study, we tested the hypothesis that high salinity acclimatization can mitigate cadmium (Cd) toxicity in the microalga Dunaliella salina. To this end, microalgal cells were subjected to high salinity (60 g/L) for 12 weeks until the growth rate remained stable between generations and were then exposed to 2.5 mg/L of Cd for 4 days. Read More

Aquat Toxicol 2020 Jun 22;223:105485. Epub 2020 Apr 22.

Sorbonne Université, CNRS, Laboratoire d'Océanographie de Villefranche, LOV, F-06230, Villefranche-sur-Mer, France.

Even though HPLC-MS is commonly used to quantify the toxin content of Ostreopsis spp. cells, there is a need to develop easy-to-use toxicological tests to set thresholds during Ostreopsis spp. blooms. Read More

Aquat Toxicol 2020 Jun 7;223:105475. Epub 2020 Apr 7.

CFE-Centre for Functional Ecology, Department of Life Sciences, University of Coimbra, Calçada Martim de Freitas, 3000-456 Coimbra, Portugal. Electronic address:

Ciguatera fish poisoning is a frequently reported non-bacterial food-borne illness related to the consumption of seafood contaminated with ciguatoxins, and possibly maitotoxins. These toxins are synthesized by marine dinoflagellate species of Gambierdiscus and Fukuyoa genera, and their abundance is a matter of great concern due to their adverse effects to aquatic life and human health. The present study aims to assess the sensitivity of rat cardiomyoblast H9c2(2-1) cells to Gambierdiscus toxic compounds using concentration- and time-dependent sulforhodamine B (SRB) colorimetric assays. Read More

Aquat Toxicol 2020 Jun 11;223:105476. Epub 2020 Apr 11.

Biology, The LifeScience Center, School of Science and Technology, Örebro University, SE-701 82, Örebro, Sweden. Electronic address:

Nonsteroidal anti-inflammatory drugs (NSAIDs) are widely used pharmaceuticals to treat pain, fever and inflammation. NSAIDs are also known to have many side effects including adverse effects on reproduction in both humans and animals. As NSAIDs usage is not regulated they are frequently detected at high concentrations in the environment. Read More

Aquat Toxicol 2020 May 30;222:105478. Epub 2020 Mar 30.

Great Lakes Toxicology & Ecology Division, Center for Computational Toxicology & Exposure, U.S. Environmental Protection Agency, Cincinnati, OH, 45268, USA. Electronic address:

This study was undertaken to systematically assess the utilities and performance of ontology-based semantic analysis in adverse outcome pathway (AOP) research. With an increasing number of AOPs developed by scientific domain experts to organize toxicity information and facilitate chemical risk assessment, there is a pressing need for objective approaches to evaluate the biological coherence and quality of these AOPs. Powered by ontologies covering a wide range of biological domains, abundant phenotypic data annotated ontologically, and some sophisticated knowledge computing tools, semantic analysis has great potential in this area of application. Read More

Aquat Toxicol 2020 May 26;222:105477. Epub 2020 Mar 26.

Hubei Provincial Engineering Laboratory for Pond Aquaculture, College of Fisheries, Huazhong Agricultural University, Wuhan, 430070, China. Electronic address:

As a typical organophosphorus flame retardant, tris (2-chloroethyl) phosphate (TCEP) has been widely detected in various environmental media. Toxicity of TCEP to vertebrates have been investigated, but potential effects on lower trophic level species were unknown to date. In this study, toxic effects and molecular mechanisms of toxic actions of TCEP on the aquatic protozoan Tetrahymena thermophila were evaluated by use of phenotypic observations, transcriptome sequencing analysis and real-time quantitative PCR detection. Read More

Aquat Toxicol 2020 May 19;222:105474. Epub 2020 Mar 19.

Department of Biotechnology, St. Peter's Institute of Higher Education and Research, Avadi-600 054, Chennai, Tamil Nadu, India. Electronic address:

Larval toxicity of ethanolic extract of C. parvula (Ex-Cp) was prominent in the second and the third instars at the maximum lethal dosage of 100 ppm with 98 and 97 % mortality rate respectively. The LC and LC was displayed at 43 ppm and 88 ppm dosage respectively. Read More

Aquat Toxicol 2020 May 9;222:105467. Epub 2020 Mar 9.

The Key Laboratory of Leather Chemistry and Engineering of Ministry of Education, Sichuan University, Chengdu, Sichuan, 610065, China; National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu, Sichuan, 610065, China.

This paper reports the proportion-dependent toxicity of binary surfactant mixtures containing anionic sodium dodecyl sulfate (SDS) and nonionic fatty alcohol-polyoxyethlene ether (AEO) toward Photobacterium phosphoreum. The crucial role of toxicity interactions was elucidated by spectroscopic probing the refolding of the unfolded bovine serum albumin (BSA) induced by SDS and theoretical calculating the interaction parameter of mixed surfactants based on Rubingh's model from the critical micelle concentrations. The SDS/AEO mixtures can be divided into two groups based on the toxicity response to the proportion of AEO in the mixtures: Group I contained low mass proportions of AEO, that is, SDS:AEO = 4:1, 3:1; Group II featured high AEO proportions, that is, SDS:AEO = 3:2, 1:1, 2:3, 1:4. Read More

Aquat Toxicol 2020 May 16;222:105473. Epub 2020 Mar 16.

School of Environmental Science and Engineering, Shandong University, Qingdao, 266237, PR China.

Antibiotic contaminants have the potential to interfere with the control of cyanobacterial bloom through generating hormesis in cyanobacteria at current contamination level of ng L. This study investigated the influence of a mixture of four frequently detected antibiotics, amoxicillin, ciprofloxacin, sulfamethoxazole and tetracycline, during the treatment of Microcystis aeruginosa by copper sulfate (CuSO) algaecide. CuSO significantly (p <  0. Read More

Aquat Toxicol 2020 May 12;222:105472. Epub 2020 Mar 12.

Institute of Marine Biology & Pharmacology, Ocean College, Zhejiang University, 1 Zheda Road, Dinghai District, Zhoushan, 316000, Zhejiang, PR China; College of Marine Ocean Science and Technology, Zhejiang Ocean University, Zhoushan, 316022, PR China. Electronic address:

β-carotene is an efficient antioxidant and its accumulation is an oxidative response to stressors. Dunaliella salina strain GY-H13 is rich in β-carotene under environmental stresses, which was selected as material to understand the molecular mechanism underlying β-carotene biosynthesis. Seven full length cDNA sequences in β-carotene biosynthesis pathway were cloned, including geranylgeranyl pyrophosphate synthase (GGPS), phytoene synthase (PSY), phytoene desaturase (PDS), 15-cis-zeta-carotene isomerase (ZISO), zeta-carotene desaturase (ZDS), prolycopene isomerase (CRTISO), lycopene beta-cyclase (LCYb). Read More

Aquat Toxicol 2020 May 12;222:105471. Epub 2020 Mar 12.

School of Environmental Studies, Queen's University, K7L 3N6, ON, Canada. Electronic address:

The toxicity of waterborne retene (7-isopropyl-1-methyl phenanthrene) to post-hatch embryos of rainbow trout (Oncorhynchus mykiss) was assessed at 5 and 11 °C. Survival times of retene-exposed embryos were 70 % longer at 5 °C than at 11 °C, but survival times and LC50 s did not vary when time was expressed as degree-days (thermal units), i.e. Read More

Aquat Toxicol 2020 May 18;222:105470. Epub 2020 Mar 18.

College of Life Sciences, Shaanxi Normal University, Xi'an, 710119, China. Electronic address:

Cadmium (Cd) a highly toxic metal to human and wildlife health and it is hazardous to both terrestrial and aquatic life. In this study, we used RNA sequencing analysis to examine the effects of chronic cadmium exposure on liver lipid metabolism of Bufo gargarizans larvae. Tadpoles were exposed to cadmium concentrations at 0, 5, 10, 50, 100 and 200 μg L from Gosner stage 26-42 of metamorphic climax. Read More

Aquat Toxicol 2020 May 9;222:105468. Epub 2020 Mar 9.

Departamento de Biologia Celular, Embriologia e Genética, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina, Brazil. Electronic address:

The extracellular matrix (ECM) is a non-cellular and three-dimensional structure, constituted by a macromolecular dynamic network that involves the cells in all animal tissues, including embryonic ones. Several studies with vertebrates and cell cultures have reported deleterious effects of ultraviolet-B (UVB) radiation on the components associated with the ECM. However, studies focusing on the UVB radiation effects on ECM components of crustaceans during embryonic development are very scarce. Read More

Aquat Toxicol 2020 May 18;222:105448. Epub 2020 Feb 18.

Laboratório de Cultivo e Ecotoxicologia, Departamento de Oceanografia, Universidade Federal de Pernambuco, Av. Arquitetura s/n, Cidade Universitária, Recife, CEP 50740-550, Pernambuco, Brazil.

Pyriproxyfen (PPF) is a synthetic substance and an insect juvenile hormone agonist with growth regulating effect. It is used worldwide as a pesticide in agriculture and public health campaigns, including the control of Aedes aegypti proliferation. It has low volatility, high Kow value and high lability in aerobic aquatic systems but is considered persistent in anaerobic systems, with a half-life of 288. Read More

Aquat Toxicol 2020 May 28;222:105454. Epub 2020 Feb 28.

National Oceanic and Atmospheric Administration, National Ocean Service, National Centers for Coastal Ocean Science, Stressor Detection and Impacts Division, Hollings Marine Laboratory, 331 Fort Johnson Rd., Charleston, SC, 29412, USA.

Recent oil spill responses such as the Deepwater Horizon event have underscored the need for crude oil ecotoxicological threshold data for shallow water corals to assist in natural resource damage assessments. We determined the toxicity of a mechanically agitated oil-seawater mixture (high-energy water-accommodated fraction, HEWAF) of a sweet crude oil on a branched stony coral, Pocillopora damicornis. We report the results of two experiments: a 96 h static renewal exposure experiment and a "pulse-chase" experiment of three short-term exposure durations followed by a recovery period in artificial seawater. Read More

Aquat Toxicol 2020 May 10;222:105469. Epub 2020 Mar 10.

Vitargent (International) Biotechnology Limited, Unit 516, 5/F. Biotech Centre 2, No. 11 Science Park West Avenue, Hong Kong Science Park, Shatin, Hong Kong SAR, People's Republic of China. Electronic address:

Phthalates are commonly used in plastic products in daily life. The endocrine-disrupting effects of phthalates have been widely reported. Accumulating evidence from human cohorts and lab animals indicate exposure to phthalates might impair neurodevelopment. Read More

Aquat Toxicol 2020 May 3;222:105463. Epub 2020 Mar 3.

CONICET - Universidad de Buenos Aires, Instituto de Ecología, Genética y Evolución de Buenos Aires (IEGEBA), Int. Güiraldes 2620, Pabellón II, Ciudad Universitaria, CP 1428 Ciudad Autónoma de Buenos Aires, Buenos Aires, Argentina; Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Depto. Ecología, Genética y Evolución. Int. Güiraldes 2620, Pabellón II, Ciudad Universitaria, CP 1428 Ciudad Autónoma de Buenos Aires, Buenos Aires, Argentina.

Massive use of glyphosate-based herbicides in agricultural activities has led to the appearance of this herbicide in freshwater systems, which represents a potential threat to these systems and their communities. These herbicides can affect autotrophic and heterotrophic picoplankton abundance. However, little is known about glyphosate impact on the whole structure of these assemblages. Read More

Aquat Toxicol 2020 May 9;222:105466. Epub 2020 Mar 9.

State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China. Electronic address:

The co-occurrence of hypoxia and xenobiotics is extremely common in natural environments, highlighting the necessity to elicit their interaction on aquatic toxicities. In the present study, marine medaka embryos were exposed to various concentrations (nominal 0, 1, 3.3 and 10 mg/L) of perfluorobutane sulfonate (PFBS), an environmental pollutant of emerging concern, under either normoxia (6. Read More

Aquat Toxicol 2020 May 29;222:105461. Epub 2020 Feb 29.

iES Landau, Institute for Environmental Sciences, University of Koblenz-Landau, Fortstraße 7, D-76829, Landau, Germany; Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, Lennart Hjelms väg 9, SWE-75007, Uppsala, Sweden. Electronic address:

Antibiotics may constitute a risk for aquatic detritivorous macroinvertebrates (i.e., shredders) via waterborne and dietary antibiotic exposure. Read More

Aquat Toxicol 2020 May 2;222:105462. Epub 2020 Mar 2.

Department of Biological Science, College of Science, Sungkyunkwan University, Suwon 16419, South Korea. Electronic address:

The copepod Tigriopus japonicus has been widely used as an experimental species in the field of ecotoxicology. We have sequenced and assembled the whole genome of T. japonicus with comparative analysis of gene families that represent detoxification phases in two additional public genomes of Tigriopus spp. Read More

Aquat Toxicol 2020 May 4;222:105465. Epub 2020 Mar 4.

Ecology Unit, Dept. Functional Biology, Universidade de Santiago de Compostela, Fac. Biología, Lope Gómez de Marzoa s/n, Santiago de Compostela, 15782 A, Coruña, Spain.

The presence of trace elements in marine habitats is a serious environmental problem which increasingly affects ecosystem and human health. The use of macroalgae as contamination biomonitors represents a valuable alternative approach to traditional physicochemical methods. The present study was carried out to determine the optimal number of samples of Fucus vesiculosus needed to detect statistically significant differences in the mean concentrations of Al, As, Cd, Co Cr, Cu, Fe, Hg, Ni, Pb, Zn, N and δN between two sampling sites affected by different levels of contamination. Read More

Aquat Toxicol 2020 May 2;222:105464. Epub 2020 Mar 2.

Great Lakes Toxicology and Ecology Division, US Environmental Protection Agency, 6201 Congdon Blvd., Duluth, MN, 55804, USA.

Clustered regularly interspaced short palindromic repeats (CRISPR)/Cas9 genome editing allows for the disruption or modification of genes in a multitude of model organisms. In the present study, we describe and employ the method for use in the fathead minnow (Pimephales promelas), in part, to assist in the development and validation of adverse outcome pathways (AOPs). The gene coding for an enzyme responsible for melanin production, tyrosinase (tyr), was the initial target chosen for development and assessment of the method since its disruption results in abnormal pigmentation, a phenotype obvious within 3-4 d after injection of fathead minnow embryos. Read More

Aquat Toxicol 2020 May 12;222:105447. Epub 2020 Feb 12.

Duke Marine Laboratory, Nicholas School of the Environment, Duke University, Beaufort, NC, 28516, United States. Electronic address:

Multiple mechanisms for plastic consumption by marine animals have been proposed based on the feeding cues and behavior of the animal studied. We investigated plastic consumption in sea anemones. We found that anemones readily consumed pristine National Institute of Standards and Technology low-density polyethylene and high-density polyethylene II and III pre-production pellets. Read More

Aquat Toxicol 2020 May 18;222:105453. Epub 2020 Feb 18.

Burridge Consulting Inc., 61 Emmalee Dr Stratford PE, Canada C1B 0B5, Canada. Electronic address:

Anti-parasitic drugs used in the aquaculture industry are discharged to the sea after treatment of salmon. In this study, the effects of azamethiphos (AZA) in the Salmosan® formulation and deltamethrin (DEL) in the Alpha Max® formulation, have been assessed in Northern shrimp larvae (Pandalus borealis) when administered both separately and in combination. The exposure concentrations were 100 ng/L for AZA and 2 ng/L for DEL, each representing a 1000-fold dilution of the prescribed concentrations for salmon. Read More

Aquat Toxicol 2020 May 2;222:105422. Epub 2020 Feb 2.

UMR 7245 CNRS/MNHN "Molécules de Communication et Adaptations des Micro-organismes", Muséum National d'Histoire Naturelle, Paris France. Electronic address:

The proliferations of cyanobacteria are increasingly prevalent in many rivers and water bodies due especially to eutrophication. This work aims to study in female medaka fish the toxicity, the transfer and the depuration of the anatoxin-a, a neurotoxin produced by benthic cyanobacterial biofilms. This work will provide answers regarding acute toxicity induced by single gavage by anatoxin-a and to the risks of exposure by ingestion of contaminated fish flesh, considering that data on these aspects remain particularly limited. Read More

Aquat Toxicol 2020 May 17;222:105449. Epub 2020 Feb 17.

Bioengineering Laboratory-CIETI, ISEP-School of Engineering, Polytechnic Institute of Porto, Rua Dr António Bernardino de Almeida, 431, 4249-015 Porto, Portugal; CEB-Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal. Electronic address:

Metolachlor (MET) is an herbicide widely used and frequently found (at μg L) in aquatic systems. This work aimed to study the modes of action of MET on the green microalga Pseudokirchneriella subcapitata. Algae exposed to 115 or 235 μg L MET, for 48 or 72 h, presented a reduction of metabolic activity, chlorophyll a and b content and photosynthetic efficiency. Read More

Aquat Toxicol 2020 May 18;222:105450. Epub 2020 Feb 18.

Program in Health Sciences, Cruzeiro do Sul University, 01506-000, São Paulo, SP, Brazil. Electronic address:

The toxicity of heavy metals in algal monocultures is well studied and is mediated by reactive oxygen and nitrogen species (ROS/RNS). However, little is known about the toxicity of heavy metals and the mechanisms involved in mixed cultures. Here we examine the oxidative stress and toxic effects of Cu on the green alga Dunaliella salina (DS) and the cyanobacteria Synecochoccus elongatus (SE) in both mono- and mixed cultures. Read More

Aquat Toxicol 2020 May 18;222:105451. Epub 2020 Feb 18.

Inner Mongolia Key Laboratory of Toxicant Monitoring and Toxicant and Toxicology, Collage of Animal Science and Technology, Inner Mongolia University for Nationalities, Tongliao, Inner Mongolia 028000, China. Electronic address:

Musk compounds are often used as to treat heart-related diseases and are widely used in Asia. Muscone is one of the most important physiologically active compounds of natural musk. Muscone is a chiral compound and can be further classified into S-muscone and R-muscone and both are present in synthetic musk. Read More