Effects of diluted bitumen exposure and recovery on the seawater acclimation response of Atlantic salmon smolts

Alderman, Sarah L.; Dilkumar, Christarin M.; Avey, Sean R.; Farrell, Anthony P.; Kennedy, Christopher J.; Gillis, Todd E.

doi:10.1016/j.aquatox.2020.105419

Cited by 14 publications

(8 citation statements)

References 58 publications

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“…Exposure of juvenile sockeye salmon to sublethal concentrations of dilbit (< 125 µg/L of PAH) caused effects on iono-and osmoregulation, stress responses and immune defense, and these effects were expected to impair seaward migration (Lin et al 2020). Lower dilbit concentrations (< 68 µg/L PAH) did not significantly affect osmoregulation (Alderman et al 2020) or swimming performance (Avey et al 2020) of Atlantic salmon (Salmo salar) smolts.…”

Section: Accepted Articlementioning

confidence: 98%

Effects on Trout Alevins of Chronic Exposures to Chemically Dispersed Access Western Blend and Cold Lake Blend Diluted Bitumens

Adams

Madison

Charbonneau

et al. 2020

Enviro Toxic and Chemistry

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This study assessed the chronic toxicity of two chemically enhanced water accommodated fractions (CEWAF) of dilbits, Access Western Blend (AWB) and Cold Lake Blend (CLB), to rainbow trout alevins. Chemical dispersion was used to overcome the resistance to dispersion of dilbits and to generate test solutions that contained more and smaller oil droplets for increased partitioning of petroleum hydrocarbons into water.Test solutions were characterized by fluorescence spectroscopy (FS), a rapid and inexpensive analytical tool, to compare toxicity endpoints measured by fluorescence (TPH-F). Cumulative mortality and the prevalence and severity of malformations increased following exposure of alevins to dispersed dilbits. Toxicity curves overlapped for AWB and CLB when expressed as TPH-F and 22-24 d LC/EC50s ranged from 0.36 to 1.5 mg/L. Gene expression in alevins was also altered following exposure to dispersed dilbit, with relative cyp1a mRNA levels increasing up to 170-fold for AWB and up to 240-fold for CLB. AWB and CLB caused similar toxicity to rainbow trout alevins as light to medium conventional crude oils, and rainbow trout alevins were more sensitive than yellow perch, Japanese medaka, and fathead minnow embryos exposed to dispersed AWB and CLB. This research is the first study assessing the embryotoxicity of dilbits to a Canadian freshwater salmonid species.

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Section: Accepted Articlementioning

confidence: 98%

Effects on Trout Alevins of Chronic Exposures to Chemically Dispersed Access Western Blend and Cold Lake Blend Diluted Bitumens

Adams

Madison

Charbonneau

et al. 2020

Enviro Toxic and Chemistry

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“…The excessive extraction of natural resources globally poses a significant threat to both the environment and human well-being. , One of the pressing concerns worldwide is the pollution of aquatic resources, which has led to increased awareness and initiatives to preserve water bodies. Various anthropogenic activities, including uncontrolled and unplanned incomplete combustion of carbon-containing fossil fuels like coal, diesel, wood, fuel oil, and kerosene, release pollutants into aquatic environments, ultimately polluting surface waters . Polycyclic aromatic hydrocarbons (PAHs), with naphthalene as a notable example, are widely distributed in aquatic ecosystems .…”

Section: Introductionmentioning

confidence: 99%

Exploring the Impact of Naphthalene (Polycyclic Aromatic Hydrocarbons) on Anabas testudineus (Bloch) through Dose-Specific Bioenzymological Analysis

Dey

2024

ACS Omega

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This study addresses the increasing concern about naphthalene, a polycyclic aromatic hydrocarbon (PAH), highlighting its growing threats to the environment and aquatic life. The research examines its impact on Anabas testudineus (Bloch) through a detailed dose-specific bioenzymological analysis. Experimental fish groups were exposed to T1 (0.71 mg/L) and T2 (1.42 mg/L) naphthalene concentrations, representing 25 and 50% of the LC 50 value, respectively, over a 1−21 day period. Following the experiment, water samples underwent physicochemical analysis, while fish tissues were examined for diverse bioenzymological parameters. Among these parameters, aspirate aminotransferase (AST) and alanine aminotransferase (ALT) serve as crucial indicators for monitoring the physiological status of fish and addressing pollution induced by PAHs, especially naphthalene. Statistical significance was observed in morphopathological changes and erythrocyte alterations, particularly the presence of tear-drop appearance (Tr) positively interacting with swelled cells (Sc), vacuolated cells (Va), and sickle cells (Sk) (P < 0.05). These findings highlight tear-drop appearance (Tr) as a significant biomarker in response to naphthalene exposure. The observed changes in A. testudineus tissue bioenzymology, apoptosis, and erythrocytic alterations were exposure and dose-dependent. The research highlights the significance of overseeing and controlling PAH concentrations in aquatic ecosystems to ensure the well-being of A. testudineus (Bloch).

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“…Naphthalene a widely distributed PAH in air and aquatic environments forms a major constituent of petroleum fuels [3]. Anthropogenic activity has been implicated in the abundance and distribution of naphthalene and is regarded as a major contributor of the aquatic environment [4]. "Phenanthrene is one of the most abundant PAH compounds in the aquatic environment.…”

Section: Introductionmentioning

confidence: 99%

Effects of PAH Mixtures on Haematological, Hepatic and Oxidative Stress Biomarkers in Clarias gariepinus

Osuagwu

Ujowundu

Nwaogu

et al. 2023

AJFAR

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Haematological, hepatic and oxidative stress parameters in juvenile Clarias gariepinus exposed to a combined ternary mixture of naphthalene, phenanthrene and benzo[a]pyrene were investigated under static-renewal bioassay conditions. The test organisms were exposed to two levels of treatments of the mixed compounds for a period of 35 days. Red blood cell (RBC) count, haemoglobin (Hb) concentration and haematocrit (Hct) were significantly lowered in exposed fish compared to the control. Significant decreases were also observed in mean corpuscular volume (MCV), mean corpuscular haemoglobin (MCH) and mean corpuscular haemoglobin concentration (MCHC). White blood cell (WBC) and platelet (PLT) counts were significantly raised in exposed organisms compared to the control. There were significant reductions in total plasma protein and bilirubin. While increases in superoxide dismutase (SOD) and catalase (CAT) were significant, that of glutahthione s-tranferase (GST) was not significant.

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Effects of diluted bitumen exposure and recovery on the seawater acclimation response of Atlantic salmon smolts

Cited by 14 publications

References 58 publications

Effects on Trout Alevins of Chronic Exposures to Chemically Dispersed Access Western Blend and Cold Lake Blend Diluted Bitumens

Effects on Trout Alevins of Chronic Exposures to Chemically Dispersed Access Western Blend and Cold Lake Blend Diluted Bitumens

Exploring the Impact of Naphthalene (Polycyclic Aromatic Hydrocarbons) on Anabas testudineus (Bloch) through Dose-Specific Bioenzymological Analysis

Effects of PAH Mixtures on Haematological, Hepatic and Oxidative Stress Biomarkers in Clarias gariepinus

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