Heavy metal contamination and bioaccumulation in Khorat snail-eating turtles (<i>Malayemys khoratensis</i>) from an e-waste recycling activity site in Thailand

Mokarat, Monthakarn; Ruangsakunporn, Apichaya; Chaianunporn, Thotsapol; Lomthaisong, Khomsorn; Robson, Mark G.; Keithmaleesatti, Sarun

doi:10.1080/10807039.2021.2023806

Cited by 2 publications

(3 citation statements)

References 59 publications

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“…Unfortunately, aquaculture is exposed to pollutants that limit fish production and negatively impact fish growth and physiological homeostasis. Almost all industrial toxic effluents eventually end up in aquatic ecosystems and the frequent discharges of these pollutants have negative impacts on aquatic ecosystems [ 6 , 7 ]. Moreover, along the coastal areas of the Egyptian Nile River increasing phenolic compounds residues and other petroleum components is considered a limiting factor for the survivability of fish species in different natural water which leads to elevating mortalities [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

Polystyrene nanoplastic and engine oil synergistically intensify toxicity in Nile tilapia, Oreochromis niloticus

Sayed,

Emeish,

Bakry

et al. 2024

BMC Vet Res

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Polystyrene nanoplastic (PS-NPs) and Engine oil (EO) pose multiple ecotoxic effects with increasing threat to fish ecosystems. The current study investigated the toxicity of 15 days exposure to PS-NPs and / or EO to explore their combined synergistic effects on Nile tilapia, Oreochromis niloticus (O. niloticus). Hematobiochemical parameters, proinflammatory cytokines, and oxidative stress biomarkers as well as histological alterations were evaluated. The experimental design contained 120 acclimated Nile tilapia distributed into four groups, control, PS-NPs (5 mg/L), EO (1%) and their combination (PS-NPs + EO). After 15-days of exposure, blood and tissue samples were collected from all fish experimental groups. Results indicated that Nile tilapia exposed to PS-NPs and / or EO revealed a significant decrease in almost all the measured hematological parameters in comparison to the control, whereas WBCs and lymphocyte counts were significantly increased in the combined group only. Results clarified that the combined PS-NPs + EO group showed the maximum decrease in RBCs, Hb, MCH and MCHC, and showed the maximum significant rise in interleukin-1β (IL-1β), and interleukin-6 (IL-6) in comparison to all other exposed groups. Meanwhile, total antioxidant capacity (TAC) showed a significant (p < 0.05) decline only in the combination group, whereas reduced glutathione (GSH) showed a significant decline in all exposed groups in comparison to the control. Both malondialdehyde (MDA) and aspartate aminotransferase (AST) showed a significant elevation only in the combination group. Uric acid showed the maximum elevation in the combination group than all other groups, whereas creatinine showed significant elevation in the EO and combination group when compared to the control. Furthermore, the present experiment proved that exposure to these toxicants either individually or in combination is accompanied by pronounced histomorpholgical damage characterized by severe necrosis and hemorrhage of the vital organs of Nile tilapia, additionally extensively inflammatory conditions with leucocytes infiltration. We concluded that combination exposure to both PS-NPs and EO caused severe anemia, extreme inflammatory response, oxidative stress, and lipid peroxidation effects, thus they can synergize with each other to intensify toxicity in fish.

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Section: Introductionmentioning

confidence: 99%

Polystyrene nanoplastic and engine oil synergistically intensify toxicity in Nile tilapia, Oreochromis niloticus

Sayed,

Emeish,

Bakry

et al. 2024

BMC Vet Res

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“…Pollution in aquatic environments with a substantial array of pollutants has drawn serious attention globally [ 1 , 2 ]. The discharge of untreated waste with several chemical pollutants and toxicants into water bodies, which is the consequence of modern agricultural practices, rapid urbanization, and industrialization, is responsible for the degradation of aquatic ecological systems [ 3 , 4 ]. Nowadays, heavy metal contamination or pollution of many aquatic habitats is becoming a matter of serious concern [ 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

“…In aquatic ecosystems, water and food particles are the major pathways through which Pb enters living creatures and accumulates in vital organs [ 14 , 15 , 16 ]. Several studies have shown that aquatic species pick up this kind of toxic metal following the concentrations present in the neighboring environment [ 4 , 17 ]. The biological equilibrium becomes highly threatened if the concentration of Pb grows beyond the tolerance limit in an aquatic ecosystem, ultimately resulting in the degradation of the entire ecosystem [ 14 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

Impact of Pb Toxicity on the Freshwater Pearl Mussel, Lamellidens marginalis: Growth Metrics, Hemocyto-Immunology, and Histological Alterations in Gill, Kidney, and Muscle Tissue

Chowdhury

Schneider

et al. 2023

Toxics

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Pb is one of the most extensively used harmful heavy metals in Bangladesh, and its occurrence in waters affects aquatic organisms significantly. The tropical pearl mussel, Lamellidens marginalis, was exposed to different concentrations (T1 21.93 mgL−1, T2 43.86 mgL−1, and T3 87.72 mgL−1) of Pb(NO3)2 and was evaluated against a control C 0 mgL−1 of Pb(NO3)2, followed by a 96 h acute toxicity test. The LC50 value was recorded as 219.32 mgL−1. The physicochemical parameters were documented regularly for each treatment unit. The values of % SGR, shell weight, soft tissue wet weight, and weight gain remained statistically higher for the control group in comparison with the treatment. No mortality was noted for control units, while a gradually decreased survival rate was recorded for the different treatment groups. Fulton’s condition factor was recorded as highest in the control and lowest in the T3 unit, while the condition indices did not vary between the control and treatment groups. The hemocyte was accounted as maximum in the control and T1, while minimum in T2 and T3. The serum lysosomal parameters also followed a similar pattern, and a significantly low level of lysosomal membrane stability, and serum lysosome activity was noted for T3 and T2 units in comparison to the control group. The histology of the gill, kidney, and muscle was well structured in the control group, while distinct pathologies were observed in the gill, kidney, and muscle tissue of different treatment groups. The quantitative comparison revealed that the intensity of pathological alteration increased as the dosage of Pb increased. The current study, therefore, indicated that intrusion of Pb(NO3)2 in the living medium significantly alters growth performance and hemocyte counts, and chronic toxicity induces histomorphological abnormalities in vital organs.

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Heavy metal contamination and bioaccumulation in Khorat snail-eating turtles (Malayemys khoratensis) from an e-waste recycling activity site in Thailand

Cited by 2 publications

References 59 publications

Polystyrene nanoplastic and engine oil synergistically intensify toxicity in Nile tilapia, Oreochromis niloticus

Polystyrene nanoplastic and engine oil synergistically intensify toxicity in Nile tilapia, Oreochromis niloticus

Impact of Pb Toxicity on the Freshwater Pearl Mussel, Lamellidens marginalis: Growth Metrics, Hemocyto-Immunology, and Histological Alterations in Gill, Kidney, and Muscle Tissue

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