Oxidative stress, histopathological alterations and anti-oxidant capacity in different tissues of largemouth bass (Micropterus salmoides) exposed to a newly developed sodium carbonate peroxyhydrate granular algaecide formulated with hydrogen peroxide
Publication date: Available online 15 November 2019Source: Aquatic ToxicologyAuthor(s): Amit Kumar Sinha, Nicholas Romano, Jyotsna Shrivastava, Jesus Monico, West M. BishopAbstractVarious strategies exist to control noxious cyanobacterial populations, although the application of a newly developed granular compound (sodium carbonate peroxyhydrate ‘SCP’, trade name ‘PAK® 27’ algaecide) containing hydrogen peroxide (H2O2) as the active ingredient, has been recently proven as an effective and ecofriendly treatment. However, in aquaculture settings the application of SCP to treat cynobacterial blooms...
Source: Aquatic Toxicology - November 16, 2019 Category: Toxicology Source Type: research

Effects of three zinc-containing sunscreens on development ofpurplesea urchin (strongylocentrotus purpuratus)embryos
Publication date: Available online 15 November 2019Source: Aquatic ToxicologyAuthor(s): Brittany Cunningham, Cristina Torres-Duarte, Gary Cherr, Nikki AdamsAbstractThe growing popularity of physical sunscreens will lead to an increased release of ingredients from zinc oxide (ZnO) sunscreens into marine environments. Though zinc (Zn) is a necessary micronutrient in the ocean, greater than natural Zn concentrations may be released into marine environments by use of sunscreens. The extent of the consequences of this addition of Zn to the ocean are not fully understood. We investigated the effects of materials released by ZnO-...
Source: Aquatic Toxicology - November 16, 2019 Category: Toxicology Source Type: research

Myriophyllum alterniflorum biochemical changes during in vitro Cu/Cd metal stress: Focusing on cell detoxifying enzymes
In this study, Myriophyllum alterniflorum (or alternate watermilfoil) enzyme activities (ascorbate peroxidase, catalase, glutathione peroxidase and superoxide dismutase) from in vitro cultures was measured over 27 days in response to copper (Cu) or cadmium (Cd) stress. These enzymes are unique to reactive oxygen species (ROS) scavenging (mainly hydrogen peroxide H2O2 and superoxide anion O2•−) and moreover showed specific or unspecific activity profiles, depending on the metal concentrations used. Our results suggest a higher-priority protection of chloroplasts during the initial days of exposure to both metals....
Source: Aquatic Toxicology - November 16, 2019 Category: Toxicology Source Type: research

MicroRNA-124 regulates lactate transportation in the muscle of largemouth bass (Micropterus salmoides) under hypoxia by targeting MCT1
Publication date: Available online 16 November 2019Source: Aquatic ToxicologyAuthor(s): L.L. Zhao, H. Wu, J.L. Sun, L. Liao, C. Cui, Q. Liu, J. Luo, X.H. Tang, W. Luo, J.D. Ma, X. Ye, S.J. Li, S. YangAbstractCarbohydrate metabolism switches from aerobic to anaerobic (glycolysis) to supply energy in response to acute hypoxic stress. Acute hypoxic stress with dissolved oxygen (DO) levels of 1.2 ± 0.1 mg/L for 24 h and 12 h re-oxygenation was used to investigate the response of the anaerobic glycolytic pathway in Micropterus salmoides muscle. The results showed that the glucose concen...
Source: Aquatic Toxicology - November 16, 2019 Category: Toxicology Source Type: research

Elevated ammonium delays the impairment of the coral-dinoflagellate symbiosis during labile carbon pollution
Publication date: Available online 16 November 2019Source: Aquatic ToxicologyAuthor(s): Vanessa N. Bednarz, Renaud Grover, Christine Ferrier-PagèsAbstractLabile dissolved organic carbon (DOC) is a major pollutant in coastal marine environments affected by anthropogenic impacts, and may significantly contribute to coral bleaching and subsequent mortality on coastal reefs. DOC can cause bleaching indirectly through the rapid proliferation of copiotrophic and pathogenic bacteria. Here we demonstrate that labile DOC compounds can also impair the coral-dinoflagellate symbiosis by directly affecting coral physiology on bo...
Source: Aquatic Toxicology - November 16, 2019 Category: Toxicology Source Type: research

Single and combined effects of insecticides on multi-level biomarkers in the non-target amphipod Gammarus fossarum exposed to environmentally realistic levels
This study aims at assessing the effects of two current-use insecticides, imidacloprid and chlorpyrifos, on Gammarus fossarum using multi-level biomarkers. In microcosms, gammarids were exposed for 72 h to insecticides tested individually or in mixture at 0.01, 0.1 and 1 µg/L of each chemical. Multi-metric responses were assessed at the individual level (behavioural traits: locomotion, respiration and amplexus formation) and the cellular level (enzymes involved in growth, moulting, digestion and cell stress). The results showed insecticide-elicited behavioural and biochemical responses from the lowest c...
Source: Aquatic Toxicology - November 15, 2019 Category: Toxicology Source Type: research

The Ca2+ signaling, Glu, and GABA responds to Cd stress in duckweed
Publication date: Available online 12 November 2019Source: Aquatic ToxicologyAuthor(s): Lin Yang, Jie Yao, Jinge Sun, Leqian Shi, Yikai Chen, Jinsheng SunAbstractCadmium (Cd) affects plants and animal health seriously. Ca2+ signals in plant cells are important for adaptive responses to environmental stresses. Here we showed that 50 μM Cd shock stimulated the Ca2+ signal via modifying the instantaneous Ca2+ flux from influx of 17 pmol·cm-2·s-1 to the efflux of 240 pmol·cm-2·s-1 at 100 μm from rhizoid tip. And the Ca2+ signal transferred to the vein and mesophyll ...
Source: Aquatic Toxicology - November 13, 2019 Category: Toxicology Source Type: research

Tributyltin disrupts fin development in Fundulus heteroclitus from both PCB-sensitive and resistant populations: Investigations of potential interactions between AHR and PPARγ
Publication date: Available online 11 November 2019Source: Aquatic ToxicologyAuthor(s): K.A. Crawford, B.W. Clark, W.J. Heiger-Bernays, S.I. Karchner, M.E. Hahn, D.E. Nacci, J.J. SchlezingerAbstractTributyltin (TBT) and dioxin-like polychlorinated biphenyls (PCBs) are environmental contaminants that are highly toxic to fish and co-occur in New Bedford Harbor (NBH), an estuarine Superfund site located in Massachusetts, USA. Atlantic killifish (Fundulus heteroclitus) that reside in NBH (and other highly contaminated sites along the east coast of the United States) have developed resistance to activation of the aryl hydrocarb...
Source: Aquatic Toxicology - November 12, 2019 Category: Toxicology Source Type: research

Effect of imidacloprid on the behavior, antioxidant system, multixenobiotic resistance, and histopathology of Asian freshwater clams (Corbicula fluminea)
Publication date: Available online 10 November 2019Source: Aquatic ToxicologyAuthor(s): Yuan Shan, Xiangsheng Hong, Jinmiao Zha, Jianhui QinAbstractIn the current study, to investigate the effect of imidacloprid on benthic bivalves, adult Asian clams (Corbicula fluminea) were exposed to 0, 20, 200, and 2000 μg/L imidacloprid for 30 d. Imidacloprid significantly inhibited the siphoning and burrowing behaviour (p 
Source: Aquatic Toxicology - November 12, 2019 Category: Toxicology Source Type: research

Dynamics of interaction and effects of microplastics on planarian tissue regeneration and cellular homeostasis
Publication date: Available online 9 November 2019Source: Aquatic ToxicologyAuthor(s): Gaetana Gambino, Alessandra Falleni, Marco Nigro, Alessandra Salvetti, Antonella Cecchettini, Chiara Ippolito, Patrizia Guidi, Leonardo RossiABSTRACTIncreasing microplastics pollution of marine and terrestrial water is a concerning issue for ecosystems and human health. Nevertheless, the interaction of microplastics with freshwater biota is still a poorly explored field. In order to achieve information concerning the uptake, distribution and effect of microplastics in planarians, Dugesia japonica specimens have been fed with mixtures of ...
Source: Aquatic Toxicology - November 10, 2019 Category: Toxicology Source Type: research

sCurrent methods to monitor microalgae-nanoparticle interaction and associated effects
Publication date: December 2019Source: Aquatic Toxicology, Volume 217Author(s): Maureen Déniel, Nicolas Errien, Philippe Daniel, Aurore Caruso, Fabienne LagardeAbstractWidespread use of nanoparticles for different applications has diffused their presence in the environment, particularly in water. Many studies have been conducted to evaluate their effects on aquatic organisms. Microalgae are at the base of aquatic trophic chains. These organisms which can be benthic or pelagic, meaning that they can enter into interaction with all kinds of particulate materials whatever their density, and constitute an interesting mo...
Source: Aquatic Toxicology - November 10, 2019 Category: Toxicology Source Type: research

A metabolomic approach to investigate effects of ocean acidification on a polar microalga Chlorella sp.
Publication date: Available online 7 November 2019Source: Aquatic ToxicologyAuthor(s): Yong-Hao Tan, Phaik-Eem Lim, John Beardall, Sze-Wan Poong, Siew-Moi PhangAbstractOcean acidification, due to increased levels of anthropogenic carbon dioxide, is known to affect the physiology and growth of marine phytoplankton, especially in polar regions. However, the effect of acidification or carbonation on cellular metabolism in polar marine phytoplankton still remains an open question. There is some evidence that small chlorophytes may benefit more than other taxa of phytoplankton. To understand further how green polar picoplankton...
Source: Aquatic Toxicology - November 9, 2019 Category: Toxicology Source Type: research

Metabolic responses of the green microalga Dunaliella salina to silver nanoparticles-induced oxidative stress in the presence of salicylic acid treatment
Publication date: Available online 6 November 2019Source: Aquatic ToxicologyAuthor(s): Elham Bahador, Alireza Einali, Omid Azizian-Shermeh, Mohammad Hossein SangtarashAbstractIn the present study, the biochemical responses and antioxidant enzymes activity of the Dunaliella salina, a green microalga, to the interaction of silver nanoparticles (AgNPs) and salicylic acid (SA) were investigated. Algal suspensions in the phase of logarithmic growth were subjected to the concentrations of 0, 5, 15, and 25 pM AgNPs with or without 1 mM SA. AgNPs level of 25 pM declined cell division but highly accumulated lev...
Source: Aquatic Toxicology - November 7, 2019 Category: Toxicology Source Type: research

EFFECTS OF WATER-ACCOMMODATED FRACTION OF DIESEL FUEL ON SEAHORSE (Hippocampus reidi) BIOMARKERS
Publication date: Available online 5 November 2019Source: Aquatic ToxicologyAuthor(s): Frederico Augusto Cariello Delunardo, Helen Sadauskas-Henrique, Vera Maria Fonseca de Almeida-Val, Adalberto Luis Val, Adriana Regina Chippari-GomesAbstractThe present work aimed to investigate the effects of acute (12, 24, 48 and 96 h) and subchronic (168 and 336 h) exposure of seahorse, Hippocampus reidi to water-accommodated fraction (WAF) of diesel fuel on biotransformation parameters, antioxidant defenses and DNA integrity. In addition, a recovery experiment was performed, where the organisms remained in absence of the...
Source: Aquatic Toxicology - November 6, 2019 Category: Toxicology Source Type: research

Molecular characterisation of cytochrome P450 enzymes in waterflea (Daphnia pulex) and their expression regulation by polystyrene nanoplastics
Publication date: Available online 3 November 2019Source: Aquatic ToxicologyAuthor(s): Donglei Wu, Zhiquan Liu, Mingqi Cai, Yang Jiao, Yiming Li, Qiang Chen, Yunlong ZhaoAbstractCytochrome P450 (CYP) enzymes are one of the largest protein families, and they metabolise a wide range of lipophilic organic endogenous and exogenous compounds. Many cytochrome P450 genes have been cloned and characterised, and they are frequently used as biomarkers in environmental toxicology studies because of their sensitivity and inducibility. In the present study, the full-length cDNAs of DpCYP370B and DpCYP4 were cloned from Daphnia pulex fo...
Source: Aquatic Toxicology - November 4, 2019 Category: Toxicology Source Type: research

Acidified water impairs the lateral line system of zebrafish embryos
In conclusion, this study suggests that lateral line hair cells are sensitive to an acidic environment, and freshwater acidification could be a threat to the early stages of fishes. (Source: Aquatic Toxicology)
Source: Aquatic Toxicology - November 4, 2019 Category: Toxicology Source Type: research

Nitroaromatic compounds damage the DNA of zebrafish embryos (Danio rerio)
Publication date: Available online 1 November 2019Source: Aquatic ToxicologyAuthor(s): Daniel Koske, Nadine I. Goldenstein, Ulrike KammannAbstractLethal and sublethal effects of trinitrotoluene (TNT) and its degradation products 2-amino-4,6-dinitrotoluene (2-ADNT) and 4-amino-2,6-dinitrotoluene (4-ADNT) to zebrafish embryos (Danio rerio) were investigated in a 120 hours exposure scenario. Lethal concentrations (LC50) were 4.5 mg/l for TNT, 13.4 mg/l for 2-ADNT and 14.4 mg/l for 4-ADNT. Embryos exposed to 2-ADNT or 4-ADNT revealed a high proportion of chorda deformations among the surviving indiv...
Source: Aquatic Toxicology - November 3, 2019 Category: Toxicology Source Type: research

Two antidepressants fluoxetine and sertraline cause growth retardation and oxidative stress in the marine rotifer Brachionus koreanus
Publication date: Available online 1 November 2019Source: Aquatic ToxicologyAuthor(s): Eunjin Byeon, Jun Chul Park, Atsushi Hagiwara, Jeonghoon Han, Jae-Seong LeeAbstractsTo understand effects of two widely used antidepressant on the antioxidant defense mechanism in the marine rotifer Brachionus koreanus, we assessed acute toxicity and measured population growth, reactive oxygen species (ROS) levels, glutathione (GSH) levels, and antioxidant enzymatic activities (GST, GR, and SOD) in response to fluoxetine hydrochloride (FLX) and sertraline hydrochloride (SER). The no observed effect concentration-24 h of fluoxetine...
Source: Aquatic Toxicology - November 3, 2019 Category: Toxicology Source Type: research

Molecular characterisation of cytochrome P450 enzymes in waterflea (Daphnia pulex) and their expression regulation by polystyrene nanoplastics.
Abstract Cytochrome P450 (CYP) enzymes are one of the largest protein families, and they metabolise a wide range of lipophilic organic endogenous and exogenous compounds. Many cytochrome P450 genes have been cloned and characterised, and they are frequently used as biomarkers in environmental toxicology studies because of their sensitivity and inducibility. In the present study, the full-length cDNAs of DpCYP370B and DpCYP4 were cloned from Daphnia pulex for the first time. The sequence of DpCYP370B consisted of an ORF of 1515 bp that encoded a 504 amino acid polypeptide, while the sequence of DpCYP4 comprised an ...
Source: Aquatic Toxicology - November 3, 2019 Category: Toxicology Authors: Wu D, Liu Z, Cai M, Jiao Y, Li Y, Chen Q, Zhao Y Tags: Aquat Toxicol Source Type: research

Acidified water impairs the lateral line system of zebrafish embryos.
In conclusion, this study suggests that lateral line hair cells are sensitive to an acidic environment, and freshwater acidification could be a threat to the early stages of fishes. PMID: 31711007 [PubMed - as supplied by publisher] (Source: Aquatic Toxicology)
Source: Aquatic Toxicology - November 3, 2019 Category: Toxicology Authors: Lin LY, Hung GY, Yeh YH, Chen SW, Horng JL Tags: Aquat Toxicol Source Type: research

Effects of sublethal Cd, Zn, and mixture exposures on antioxidant defense and oxidative stress parameters in early life stages of the purple sea urchin Strongylocentrotus purpuratus
Publication date: Available online 30 October 2019Source: Aquatic ToxicologyAuthor(s): Roberta Daniele Klein, Lygia S. Nogueira, Fabíola Xochilt Valdez Domingos, Patrícia Gomes Costa, Adalto Bianchini, Chris M. WoodAbstractOxidative stress parameters were evaluated during the first 72 h of embryonic development of purple sea urchin Strongylocentrotus purpuratus continuously exposed to control conditions, to cadmium alone (Cd, 30 µg/L), to zinc alone (Zn, 9 µg/L) or to a Cd (28 µg/L) plus Zn (9 µg/L) mixture. These sublethal concentrations represent &s...
Source: Aquatic Toxicology - November 1, 2019 Category: Toxicology Source Type: research

Cumulative effects of cadmium and natural stressors (temperature and parasite infection) on molecular and biochemical responses of juvenile rainbow trout
This study aimed to evaluate the combined effects of chronic exposure to cadmium (Cd) and elevated water temperature (23 °C) or parasite infection in juvenile rainbow trout (Oncorhynchus mykiss) using a multi-level biological approach, including RNA-sequencing. Fish were exposed to diet-borne Cd (6 μg Cd/g wet feed), individually and in combination with thermal (23 °C) or parasitic stressors, for 28 days. The parasite challenge consisted of a single exposure to glochidia (larvae) of the freshwater mussel (Strophitus undulatus), which encysts in fish gills, fins and skin. Results indicated lo...
Source: Aquatic Toxicology - November 1, 2019 Category: Toxicology Source Type: research

Effects of sublethal Cd, Zn, and mixture exposures on antioxidant defense and oxidative stress parameters in early life stages of the purple sea urchin Strongylocentrotus purpuratus.
Abstract Oxidative stress parameters were evaluated during the first 72 h of embryonic development of purple sea urchin Strongylocentrotus purpuratus continuously exposed to control conditions, to cadmium alone (Cd, 30 μg/L), to zinc alone (Zn, 9 μg/L) or to a Cd (28 μg/L) plus Zn (9 μg/L) mixture. These sublethal concentrations represent ∼ 10% of the acute EC50. Bioaccumulation, antioxidant capacity against peroxyl radicals (ACAP), total glutathione (GSH) level, glutathione-S-transferase (GST), glucose-6-phosphate dehydrogenase (G6PDH) and superoxide dismutase (SOD) activity, and lipid p...
Source: Aquatic Toxicology - October 30, 2019 Category: Toxicology Authors: Klein RD, Nogueira LS, Domingos-Moreira FXV, Gomes Costa P, Bianchini A, Wood CM Tags: Aquat Toxicol Source Type: research

In vitro exposure of vitellogenic rainbow trout ovarian follicles to endocrine disrupting chemicals can alter basal estradiol-17β production and responsiveness to a gonadotropin challenge
Publication date: Available online 27 October 2019Source: Aquatic ToxicologyAuthor(s): Christopher Monson, Graham Young, Irvin SchultzAbstractEndogenous estrogens play major roles in many aspects of female reproductive development in fish. In order to develop a relatively high-throughput assay to determine the potential impact on reproductive development, vitellogenic rainbow trout ovarian follicles were exposed to a suite of contaminants in vitro and then assessed for the ability to produce estradiol-17β (E2) after a 500 ng/ml salmon gonadotropin (sGTH) challenge. There was a positive correlation between ovari...
Source: Aquatic Toxicology - October 29, 2019 Category: Toxicology Source Type: research

In vitro exposure of vitellogenic rainbow trout ovarian follicles to endocrine disrupting chemicals can alter basal estradiol-17 β production and responsiveness to a gonadotropin challenge.
In vitro exposure of vitellogenic rainbow trout ovarian follicles to endocrine disrupting chemicals can alter basal estradiol-17β production and responsiveness to a gonadotropin challenge. Aquat Toxicol. 2019 Oct 27;217:105346 Authors: Monson C, Young G, Schultz I Abstract Endogenous estrogens play major roles in many aspects of female reproductive development in fish. In order to develop a relatively high-throughput assay to determine the potential impact on reproductive development, vitellogenic rainbow trout ovarian follicles were exposed to a suite of contaminants in vitro and then assessed f...
Source: Aquatic Toxicology - October 27, 2019 Category: Toxicology Authors: Monson C, Young G, Schultz I Tags: Aquat Toxicol Source Type: research

Early-life exposure to 17β-estradiol and 4-nonylphenol impacts the growth hormone/insulin-like growth-factor system and estrogen receptors in Mozambique tilapia, Oreochromis mossambicus
Publication date: Available online 24 October 2019Source: Aquatic ToxicologyAuthor(s): Fritzie T. Celino-Brady, Cody K. Petro-Sakuma, Jason P. Breves, Darren T. Lerner, Andre P. SealeAbstractIt is widely recognized that endocrine disrupting chemicals (EDCs) released into the environment through anthropogenic activities can have short-term impacts on physiological and behavioral processes and/or sustained or delayed long-term developmental effects on aquatic organisms. While numerous studies have characterized the effects of EDCs on temperate fishes, less is known on the effects of EDCs on the growth and reproductive physio...
Source: Aquatic Toxicology - October 25, 2019 Category: Toxicology Source Type: research

Antioxidant responses to seawater acidification in an invasive fouling mussel are alleviated by transgenerational acclimation
Publication date: Available online 22 October 2019Source: Aquatic ToxicologyAuthor(s): Liqiang Zhao, Lei Liu, Baozhan Liu, Jian Liang, Yanan Lu, Feng YangAbstractOcean acidification and marine biofouling, which may interact in the future, pose two major threats to global coastal ecosystems. Yet, the fate of highly invasive fouling species in a rapidly acidifying ocean remains poorly understood, due to lack of information on multigenerational consequences at different levels of biological organization. Here, we investigated antioxidant responses of the mussel, Musculista senhousia, a swiftly spreading invasive fouling speci...
Source: Aquatic Toxicology - October 23, 2019 Category: Toxicology Source Type: research

Editorial Board
Publication date: November 2019Source: Aquatic Toxicology, Volume 216Author(s): (Source: Aquatic Toxicology)
Source: Aquatic Toxicology - October 23, 2019 Category: Toxicology Source Type: research

Antioxidant responses to seawater acidification in an invasive fouling mussel are alleviated by transgenerational acclimation.
Abstract Ocean acidification and marine biofouling, which may interact in the future, pose two major threats to global coastal ecosystems. Yet, the fate of highly invasive fouling species in a rapidly acidifying ocean remains poorly understood, due to lack of information on multigenerational consequences at different levels of biological organization. Here, we investigated antioxidant responses of the mussel, Musculista senhousia, a swiftly spreading invasive fouling species in global coastal waters, following transgenerational exposure to elevated pCO2. In the face of seawater acidification, M. senhousia without ...
Source: Aquatic Toxicology - October 22, 2019 Category: Toxicology Authors: Zhao L, Liu L, Liu B, Liang J, Lu Y, Yang F Tags: Aquat Toxicol Source Type: research

Physiological effects of 5α-dihydrotestosterone in male mummichog (Fundulus heteroclitus) are dose and time dependent
Publication date: Available online 19 October 2019Source: Aquatic ToxicologyAuthor(s): Robert J. Rutherford, Andrea L. Lister, Deborah L. MacLatchyAbstractNumerous anthropogenic sources, such as pulp mill and sewage treatment effluents, contain androgenic endocrine disrupting compounds that alter the reproductive status of aquatic organisms. The current study injected adult male mummichog (Fundulus heteroclitus) with 0 (control), 1 pg/g, 1 ng/g or 1 μg/g body weight of the model androgen 5α-dihydrotestosterone (DHT) with the intent to induce a period of plasma sex hormone depression, a previou...
Source: Aquatic Toxicology - October 20, 2019 Category: Toxicology Source Type: research

Delayed effects of pyrene exposure during overwintering on the Arctic copepod Calanus hyperboreus
Publication date: Available online 19 October 2019Source: Aquatic ToxicologyAuthor(s): Kirstine Toxværd, Khuong V. Dinh, Ole Henriksen, Morten Hjorth, Torkel Gissel NielsenAbstractCalanus hyperboreus is the largest copepod and a key species in the Arctic food web. During the spring bloom, C. hyperboreus builds up large lipid reserves, which enable it to survive and produce eggs during overwintering. The ecological effects of oil exposure on overwintering C. hyperboreus are unknown. The present study empirically tested if exposure to the polycyclic aromatic hydrocarbon (PAH) pyrene from crude oil affects the survival,...
Source: Aquatic Toxicology - October 20, 2019 Category: Toxicology Source Type: research

Sub-Lethal Effects of a Neonicotinoid, Clothianidin, on Wild Early Life Stage Sockeye Salmon (Oncorhynchus nerka)
Publication date: Available online 19 October 2019Source: Aquatic ToxicologyAuthor(s): Vicki Lee Marlatt, Tsz Yin Ginny Leung, Sarah Calbick, Chris Metcalfe, Christopher KennedyAbstractOne of the categories of environmental contaminants possibly contributing to declining sockeye salmon (Oncorhynchus nerka) in the Fraser River, British Columbia, Canada is pesticides. In this 4-month study, the effects of environmentally relevant concentrations of a waterborne neonicotinoid, clothianidin (0.15, 1.5, 15 and 150 μg/L), on embryonic, alevin and early swim-up fry sockeye salmon derived from four unique genetic crosses ...
Source: Aquatic Toxicology - October 20, 2019 Category: Toxicology Source Type: research

Advances on assessing nanotoxicity in marine fish – the pros and cons of combining an ex vivo approach and histopathological analysis in gills
Publication date: December 2019Source: Aquatic Toxicology, Volume 217Author(s): C.L. Mieiro, M. Martins, M. da Silva, J.P. Coelho, C.B. Lopes, A. Alves da Silva, J. Alves, E. Pereira, M. Pardal, M.H. Costa, M. PachecoAbstractThe need to overcome logistic and ethical limitations of in vivo nanotoxicity evaluation in marine organisms is essential, mostly when dealing with fish. It is well established that medium/solvent conditions affect dispersion and agglomeration of nanoparticles (NPs), which represents a constraint towards a solid and realistic toxicity appraisal. In this way the pros and cons of an ex vivo approach, usi...
Source: Aquatic Toxicology - October 19, 2019 Category: Toxicology Source Type: research

Advances on assessing nanotoxicity in marine fish - the pros and cons of combining an ex vivo approach and histopathological analysis in gills
Publication date: Available online 13 October 2019Source: Aquatic ToxicologyAuthor(s): C.L. Mieiro, M. Martins, M. da Silva, J.P. Coelho, C.B. Lopes, A. Alves da Silva, J. Alves, E. Pereira, M. Pardal, M.H. Costa, M. PachecoAbstractThe need to overcome logistic and ethical limitations of in vivo nanotoxicity evaluation in marine organisms is essential, mostly when dealing with fish. It is well established that medium/solvent conditions affect dispersion and agglomeration of nanoparticles (NPs), which represents a constraint towards a solid and realistic toxicity appraisal. In this way the pros and cons of an ex vivo approa...
Source: Aquatic Toxicology - October 14, 2019 Category: Toxicology Source Type: research

Assessment of hematological, hepato-renal, antioxidant, and hormonal responses of Clarias gariepinus exposed to sub-lethal concentrations of oxyfluorfen
Publication date: Available online 12 October 2019Source: Aquatic ToxicologyAuthor(s): Ghada I. Abd El-Rahman, Shaimaa A.A. Ahmed, Alshimaa A. Khalil, Yasmina M. Abd-ElhakimAbstractLittle is known about the effects of oxyfluorfen, a diphenyl ether herbicide, exposure on the African catfish (Clarias gariepinus) health. Consequently, the existing investigation was designed to highlight the impacts of oxyfluorfen exposure on C. gariepinus hematological indices, liver and kidney functions, reproductive hormones, and oxidative status. Furthermore, a consequent 10-day depuration period was adopted to evaluate the recovery of the...
Source: Aquatic Toxicology - October 14, 2019 Category: Toxicology Source Type: research

Examining the role of ethylenediaminetetraacetic acid (EDTA) in larval shellfish production in seawater contaminated with heavy metals
Publication date: Available online 12 October 2019Source: Aquatic ToxicologyAuthor(s): Daniel R McDougall, Andrew Chan, Duncan J McGillivray, Martin D de Jonge, Gordon M Miskelly, Andrew G JeffsAbstractHeavy metal pollution is a concern in many coastal locations where it is frequently deleterious to the survival of young shellfish. Consequently, a great number of commercial shellfish hatcheries around the world rely on the addition of ethylenediaminetetraacetic acid (EDTA) to seawater to ensure successful larval production. Despite the importance of this practice to global shellfish production the mode of action of EDTA in...
Source: Aquatic Toxicology - October 14, 2019 Category: Toxicology Source Type: research

Advances on assessing nanotoxicity in marine fish - the pros and cons of combining an ex vivo approach and histopathological analysis in gills.
Abstract The need to overcome logistic and ethical limitations of in vivo nanotoxicity evaluation in marine organisms is essential, mostly when dealing with fish. It is well established that medium/solvent conditions affect dispersion and agglomeration of nanoparticles (NPs), which represents a constraint towards a solid and realistic toxicity appraisal. In this way the pros and cons of an ex vivo approach, using a simplified exposure medium (seawater) and addressing gills histopathology, were explored. The nanotoxic potential of environmentally realistic concentrations of titanium dioxide NPs (TiO2 NPs) was also ...
Source: Aquatic Toxicology - October 13, 2019 Category: Toxicology Authors: Mieiro CL, Martins M, da Silva M, Coelho JP, Lopes CB, da Silva AA, Alves J, Pereira E, Pardal M, Costa MH, Pacheco M Tags: Aquat Toxicol Source Type: research

Denitrification responses to increasing cadmium exposure in Baltic Sea sediments
In this study, we examined how the double exposure of Cd and fluctuations in oxygen affects denitrification in Baltic Sea sediment. Results show that oxygen largely regulated N2O and N2 production after 21 days of exposure to Cd (ranging from 0-500 µg/L, 5 different treatments, measured by the isotope pairing technique (IPT). In the high Cd treatment (500 µg/L) the variation in N2 production increased compared to the other treatments. Increases in N2 production are suggested to be an effect of 1) enhanced nitrification that increases NO3- availability thus stimulating denitrification, and 2) Cd su...
Source: Aquatic Toxicology - October 11, 2019 Category: Toxicology Source Type: research

Aquatic toxicology: History and future
Publication date: November 2019Source: Aquatic Toxicology, Volume 216Author(s): Lan Song, Paul K.S. Lam, Markus Hecker (Source: Aquatic Toxicology)
Source: Aquatic Toxicology - October 11, 2019 Category: Toxicology Source Type: research

Denitrification responses to increasing cadmium exposure in Baltic Sea sediments.
In this study, we examined how the double exposure of Cd and fluctuations in oxygen affects denitrification in Baltic Sea sediment. Results show that oxygen largely regulated N2O and N2 production after 21 days of exposure to Cd (ranging from 0 to 500 μg/L, 5 different treatments, measured by the isotope pairing technique (IPT)). In the high Cd treatment (500 μg/L) the variation in N2 production increased compared to the other treatments. Increases in N2 production are suggested to be an effect of 1) enhanced nitrification that increases NO3- availability thus stimulating denitrification, and 2) Cd successfully s...
Source: Aquatic Toxicology - October 11, 2019 Category: Toxicology Authors: Broman E, Motwani NH, Bonaglia S, Landberg T, Nascimento FJA, Sjöling S Tags: Aquat Toxicol Source Type: research

Sublethal exposure to copper supresses the ability to acclimate to hypoxia in a model fish species
Publication date: Available online 6 October 2019Source: Aquatic ToxicologyAuthor(s): Jennifer A. Fitzgerald, Mauricio G. Urbina, Nicholas J. Rogers, Nic R. Bury, Ioanna Katsiadaki, Rod W. Wilson, Eduarda M. SantosAbstractHypoxia is one of the major threats to biodiversity in aquatic systems. The association of hypoxia with nutrient-rich effluent input into aquatic systems results in scenarios where hypoxic waters could be contaminated with a wide range of chemicals, including metals. Despite this, little is known about the ability of fish to respond to hypoxia when exposures occur in the presence of environmental toxicant...
Source: Aquatic Toxicology - October 7, 2019 Category: Toxicology Source Type: research

History and Future
Publication date: Available online 3 October 2019Source: Aquatic ToxicologyAuthor(s): Lan Song, Paul K.S. Lam, Markus Hecker (Source: Aquatic Toxicology)
Source: Aquatic Toxicology - October 4, 2019 Category: Toxicology Source Type: research

The effect of water hardness on the toxicity of graphene oxide to bacteria in synthetic surface waters
In this study, the toxic effect of GO to E.coli was studied before and after its aggregation equilibrium in the synthetic surface waters (the soft water, moderately hard water, and hard water) to reveal the effects of GO aggregation and solution hardness. The cytotoxicity of GO increased with increasing solution hardness while decreased after GO aggregation. The 3 h 50% inhibitory concentration (IC50) values of dispersed GO in the soft water, moderately hard water, and hard water were 12.2 ± 2.2, 8.5 ± 1.5, and 4.0 ± 1.0 mg/L, respectively. After 24 h shaking (aggregation equilibrium) in the synthetic ...
Source: Aquatic Toxicology - October 4, 2019 Category: Toxicology Source Type: research

Developmental toxicity and angiogenic defects of etoxazole exposed zebrafish (Danio rerio) larvae
Publication date: Available online 3 October 2019Source: Aquatic ToxicologyAuthor(s): Hahyun Park, Jin-Young Lee, Sunwoo Park, Gwonhwa Song, Whasun LimAbstractEtoxazole, a chitin synthesis inhibitor, is widely used to control insects and mites by causing developmental defects. Despite the many advantages of pesticides, the inhibitory effects of most pesticides including etoxazole are based on biochemical reaction and their widespread application is considered as a major risk to human health and the environment because of bioaccumulation and non-target toxic effects. Though used in agricultural area, the pesticide residues ...
Source: Aquatic Toxicology - October 4, 2019 Category: Toxicology Source Type: research

The effect of water hardness on the toxicity of graphene oxide to bacteria in synthetic surface waters.
In this study, the toxic effect of GO to E.coli was studied before and after its aggregation equilibrium in the synthetic surface waters (the soft water, moderately hard water, and hard water) to reveal the effects of GO aggregation and solution hardness. The cytotoxicity of GO increased with increasing solution hardness while decreased after GO aggregation. The 3 h 50% inhibitory concentration (IC50) values of dispersed GO in the soft water, moderately hard water, and hard water were 12.2 ± 2.2, 8.5 ± 1.5, and 4.0 ± 1.0 mg/L, respectively. After 24 h shaking (aggregation equilibrium) in th...
Source: Aquatic Toxicology - October 3, 2019 Category: Toxicology Authors: Zeng Z, Yang K, Lin D Tags: Aquat Toxicol Source Type: research

Aquatic toxicology: History and future.
PMID: 31606666 [PubMed - as supplied by publisher] (Source: Aquatic Toxicology)
Source: Aquatic Toxicology - October 3, 2019 Category: Toxicology Authors: Song L, Lam PKS, Hecker M Tags: Aquat Toxicol Source Type: research

Biokinetics of the anionic surfactant linear alkylbenzene sulfonate (LAS) in the marine fish Sparus aurata: investigation via seawater and food exposure pathways
Publication date: Available online 28 September 2019Source: Aquatic ToxicologyAuthor(s): Marc Metian, Florent Renaud, François Oberhänsli, Jean-Louis Teyssié, Ali Temara, Michel WarnauAbstractUptake and depuration kinetics of [14C]C12-6-linear alkylbenzene sulfonate (LAS) in the fish Sparus aurata were determined during experimental exposure via seawater or food separately under laboratory conditions. The fish concentrated LAS from seawater (using realistic contaminant concentrations) with a mean BCF value of 20 ± 2 L kg-1 reached within 3 days and following a one-compartment ...
Source: Aquatic Toxicology - September 30, 2019 Category: Toxicology Source Type: research

Differential responses in the biotransformation systems of the oyster Crassostrea gasar (Adanson, 1757) elicited by pyrene and fluorene: molecular, biochemical and histological approach - Part I
This study aimed to evaluate the molecular, biochemical and histological responses of the oyster Crassostrea gasar exposed to pyrene (0.25 and 0.5 μM) and fluorene (0.6 and 1.2 μM), after exposure for 24 and 96 h. Concentrations of both PAHs were quantified in the water and in oyster tissues. Transcript levels of phase I (CYP3475C1, CYP2-like, CYP2AU1 and CYP356A) and phase II (GSTO-like, MGST-like and SULT-like) biotransformation-related genes and the activities of ethoxyresorufin-O-deethylase (EROD), total and microsomal glutathione S-transferase (GST and MGST) were evaluated in the gills. Also...
Source: Aquatic Toxicology - September 28, 2019 Category: Toxicology Source Type: research

THE RELATIONSHIP BETWEEN SULFUR METABOLISM AND TOLERANCE OF HEXAVALENT CHROMIUM IN Scenedesmus acutus (SPHEROPLEALES): ROLE OF ATP SULFURYLASE
Publication date: Available online 27 September 2019Source: Aquatic ToxicologyAuthor(s): Alessio Sardella, Matteo Marieschi, Isabel Mercatali, Corrado Zanni, Gessica Gorbi, Anna TorelliAbstractSulfur availability and the end products of its metabolism, cysteine, glutathione and phytochelatins, play an important role in heavy metal tolerance, chromium included. Sulfate and chromate not only compete for the transporters but also for assimilation enzymes and chromium tolerance in various organisms has been associated to differences in this pathway. We investigated the mechanisms of Cr(VI)-tolerance increase induced by S-starv...
Source: Aquatic Toxicology - September 28, 2019 Category: Toxicology Source Type: research

Distribution of vitellogenin in Japanese flounder (Paralichthys olivaceus) for biomarker analysis of marine environmental estrogens
Publication date: Available online 27 September 2019Source: Aquatic ToxicologyAuthor(s): Zhenzhong Zhang, Jun Wang, Zongbao Pan, Yabin Zhang, Xiaona Zhang, Hua Tian, Wei Wang, Shaoguo RuAbstractEstrogen pollution in marine environments has become a research hotspot due to its adverse effects on the reproduction of wild organisms. To early detection of estrogen pollution, this study developed two methods for detecting Japanese flounder vitellogenin (Vtg), a sensitive biomarker for environmental estrogens. Firstly, monoclonal antibodies (mAb) specific to Vtg were prepared using purified lipovitellin (Lv), a main Vtg-derived ...
Source: Aquatic Toxicology - September 28, 2019 Category: Toxicology Source Type: research