Toxic effects of three variants of microcystins on the intestinal histology, physiological and metabolic response of Litopenaeus vannamei
In this study, the shrimp Litopenaeus vannamei juvenile were separately exposed to 1 μg/L of three MCs variants (LR, YR, RR) for 72 h respectively, and the changes of intestinal morphology, physiological response and metabolic function were analyzed. The results showed the three MCs variants stress caused intestinal mucosal damage and disordered the homeostasis of antimicrobial genes (ALF and Lys) expression. The mRNA expression levels of antioxidant genes (Nrf2 and GPx) and apoptosis factors (CytC and Casp-3) were increased, but that of detoxification gene (CYP450) was decreased. Furthermore, the intestinal metabolic pat...
Source: Aquatic Toxicology - January 6, 2024 Category: Toxicology Authors: Yafei Duan Yuxiu Nan Yukai Yang Yifu Xing Source Type: research

Gibberellic acid induced oxidative stress, endoplasmic reticulum stress, and apoptosis in the livers of gibel carp (Carassius auratus gibelio)
In this study, we investigated the mechanisms of GA3-induced hepatic injury in gibel carp (Carassius auratus gibelio). We found that GA3 exposure caused oxidative stress, endoplasmic reticulum stress (ERS), and apoptosis. The gibel carp exposed to GA3 exhibited significant alteration in erythrocyte nuclei. GA3 induced liver damage, as indicated by increasing the aminopherase activities. GA3 led to oxidative stress by increasing malondialdehyde content and decreasing the activities of CAT and GPx. GA3 stimulated ERS and increased the expression of grp78, perk, eif2s1α, chop, atf4, ire1α, xbp1, and atf6. Additionally, GA3 ...
Source: Aquatic Toxicology - January 6, 2024 Category: Toxicology Authors: Jie-Qing Ma Source Type: research

Effects of the fungicide azoxystrobin in two habitats representative of mediterranean coastal wetlands: A mesocosm experiment
Aquat Toxicol. 2023 Dec 28;267:106828. doi: 10.1016/j.aquatox.2023.106828. Online ahead of print.ABSTRACTThis paper investigates the effects of the fungicide azoxystrobin, a compound widely used in rice farming, on aquatic communities representative of two habitats characteristic of Mediterranean wetland ecosystems: water springs and eutrophic lake waters. The long-term effects of azoxystrobin were evaluated on several structural (phytoplankton, zooplankton, macroinvertebrate populations and communities) and functional (microbial decomposition, macrophyte and periphyton growth) parameters making use of freshwater mesocosms...
Source: Aquatic Toxicology - January 4, 2024 Category: Toxicology Authors: Pablo Amador Constanza Vega Natividad Isael Navarro Pacheco Jes ús Moratalla-López Jose Palacios Melina Celeste Crettaz Minaglia Isabel L ópez M ónica Díaz Andreu Rico Source Type: research

Effects of petrogenic pollutants on North Atlantic and Arctic Calanus copepods: From molecular mechanisms to population impacts
Aquat Toxicol. 2023 Dec 28;267:106825. doi: 10.1016/j.aquatox.2023.106825. Online ahead of print.ABSTRACTOil and gas industries in the Northern Atlantic Ocean have gradually moved closer to the Arctic areas, a process expected to be further facilitated by sea ice withdrawal caused by global warming. Copepods of the genus Calanus hold a key position in these cold-water food webs, providing an important energetic link between primary production and higher trophic levels. Due to their ecological importance, there is a concern about how accidental oil spills and produced water discharges may impact cold-water copepods. In this...
Source: Aquatic Toxicology - January 4, 2024 Category: Toxicology Authors: Bj ørn Henrik Hansen Ann M Tarrant Petra H Lenz Vittoria Roncalli Rodrigo Almeda Ole Jacob Broch Dag Altin Knut Erik Tollefsen Source Type: research

Effects of the fungicide azoxystrobin in two habitats representative of mediterranean coastal wetlands: A mesocosm experiment
Aquat Toxicol. 2023 Dec 28;267:106828. doi: 10.1016/j.aquatox.2023.106828. Online ahead of print.ABSTRACTThis paper investigates the effects of the fungicide azoxystrobin, a compound widely used in rice farming, on aquatic communities representative of two habitats characteristic of Mediterranean wetland ecosystems: water springs and eutrophic lake waters. The long-term effects of azoxystrobin were evaluated on several structural (phytoplankton, zooplankton, macroinvertebrate populations and communities) and functional (microbial decomposition, macrophyte and periphyton growth) parameters making use of freshwater mesocosms...
Source: Aquatic Toxicology - January 4, 2024 Category: Toxicology Authors: Pablo Amador Constanza Vega Natividad Isael Navarro Pacheco Jes ús Moratalla-López Jose Palacios Melina Celeste Crettaz Minaglia Isabel L ópez M ónica Díaz Andreu Rico Source Type: research

Effects of petrogenic pollutants on North Atlantic and Arctic Calanus copepods: From molecular mechanisms to population impacts
Aquat Toxicol. 2023 Dec 28;267:106825. doi: 10.1016/j.aquatox.2023.106825. Online ahead of print.ABSTRACTOil and gas industries in the Northern Atlantic Ocean have gradually moved closer to the Arctic areas, a process expected to be further facilitated by sea ice withdrawal caused by global warming. Copepods of the genus Calanus hold a key position in these cold-water food webs, providing an important energetic link between primary production and higher trophic levels. Due to their ecological importance, there is a concern about how accidental oil spills and produced water discharges may impact cold-water copepods. In this...
Source: Aquatic Toxicology - January 4, 2024 Category: Toxicology Authors: Bj ørn Henrik Hansen Ann M Tarrant Petra H Lenz Vittoria Roncalli Rodrigo Almeda Ole Jacob Broch Dag Altin Knut Erik Tollefsen Source Type: research

Effects of the fungicide azoxystrobin in two habitats representative of mediterranean coastal wetlands: A mesocosm experiment
Aquat Toxicol. 2023 Dec 28;267:106828. doi: 10.1016/j.aquatox.2023.106828. Online ahead of print.ABSTRACTThis paper investigates the effects of the fungicide azoxystrobin, a compound widely used in rice farming, on aquatic communities representative of two habitats characteristic of Mediterranean wetland ecosystems: water springs and eutrophic lake waters. The long-term effects of azoxystrobin were evaluated on several structural (phytoplankton, zooplankton, macroinvertebrate populations and communities) and functional (microbial decomposition, macrophyte and periphyton growth) parameters making use of freshwater mesocosms...
Source: Aquatic Toxicology - January 4, 2024 Category: Toxicology Authors: Pablo Amador Constanza Vega Natividad Isael Navarro Pacheco Jes ús Moratalla-López Jose Palacios Melina Celeste Crettaz Minaglia Isabel L ópez M ónica Díaz Andreu Rico Source Type: research

Effects of petrogenic pollutants on North Atlantic and Arctic Calanus copepods: From molecular mechanisms to population impacts
Aquat Toxicol. 2023 Dec 28;267:106825. doi: 10.1016/j.aquatox.2023.106825. Online ahead of print.ABSTRACTOil and gas industries in the Northern Atlantic Ocean have gradually moved closer to the Arctic areas, a process expected to be further facilitated by sea ice withdrawal caused by global warming. Copepods of the genus Calanus hold a key position in these cold-water food webs, providing an important energetic link between primary production and higher trophic levels. Due to their ecological importance, there is a concern about how accidental oil spills and produced water discharges may impact cold-water copepods. In this...
Source: Aquatic Toxicology - January 4, 2024 Category: Toxicology Authors: Bj ørn Henrik Hansen Ann M Tarrant Petra H Lenz Vittoria Roncalli Rodrigo Almeda Ole Jacob Broch Dag Altin Knut Erik Tollefsen Source Type: research

How antibiotic exposure affect predator-prey interactions by population dynamics in ciliates?
In conclusion, antibiotic exposure reduced both predator and prey fitness, underlying the reason antibiotics reduces the strength of predator-prey interaction. Despite the indirect benefits of prey gain from this, the presence of predators can expedite the process of prey extinction caused by antibiotic exposure.PMID:38160499 | DOI:10.1016/j.aquatox.2023.106814 (Source: Aquatic Toxicology)
Source: Aquatic Toxicology - December 31, 2023 Category: Toxicology Authors: Jiqiu Li Ziyue Yu Qinyun Zheng Weihuang Chen Xiaofeng Lin Source Type: research

How antibiotic exposure affect predator-prey interactions by population dynamics in ciliates?
In conclusion, antibiotic exposure reduced both predator and prey fitness, underlying the reason antibiotics reduces the strength of predator-prey interaction. Despite the indirect benefits of prey gain from this, the presence of predators can expedite the process of prey extinction caused by antibiotic exposure.PMID:38160499 | DOI:10.1016/j.aquatox.2023.106814 (Source: Aquatic Toxicology)
Source: Aquatic Toxicology - December 31, 2023 Category: Toxicology Authors: Jiqiu Li Ziyue Yu Qinyun Zheng Weihuang Chen Xiaofeng Lin Source Type: research

How antibiotic exposure affect predator-prey interactions by population dynamics in ciliates?
In conclusion, antibiotic exposure reduced both predator and prey fitness, underlying the reason antibiotics reduces the strength of predator-prey interaction. Despite the indirect benefits of prey gain from this, the presence of predators can expedite the process of prey extinction caused by antibiotic exposure.PMID:38160499 | DOI:10.1016/j.aquatox.2023.106814 (Source: Aquatic Toxicology)
Source: Aquatic Toxicology - December 31, 2023 Category: Toxicology Authors: Jiqiu Li Ziyue Yu Qinyun Zheng Weihuang Chen Xiaofeng Lin Source Type: research

Copper overload induces apoptosis and impaired proliferation of T cell in zebrafish
Aquat Toxicol. 2023 Dec 19;267:106808. doi: 10.1016/j.aquatox.2023.106808. Online ahead of print.ABSTRACTCopper is an essential biometal for cell development and function, however, unbalanced copper homeostasis in T cell development and the underlying mechanisms are largely unexplored. Here, we use a zebrafish model to investigate the effect of copper overload in T cell development. We show that copper stressed zebrafish larvae exhibit a significant reduction in T cells with increased cell apoptosis and impaired cell proliferation. T cell progenitors, hematopoietic stem and progenitor cells, also exhibit increased cell apo...
Source: Aquatic Toxicology - December 30, 2023 Category: Toxicology Authors: LingYa Li JiaHao Shi WenYe Liu Yi Luo Sheng Gao Jing-Xia Liu Source Type: research

Microplastic ingestion in key fish species of food webs in the Southwest Atlantic (Marine Protected Area Namuncur á / Burdwood Bank)
The objective of this study was to analyze the occurrence, abundance, concentration, and chemical nature of MPs present in the gastrointestinal tract of two fish species, Patagonotothen guntheri and Patagonotothen ramsayi, both of which are key in the food web of the Marine Protected Area Namuncurá/ Banco Burdwood (MPA N/BB). The analyzed species presented high values of MPs per individual (MPs/ind.) and occurrence compared to other studies. P. guntheri tended to have a lower number of MPs/ind. and occurrence than P. ramsayi (P. guntheri: 2.50 ± 1.93 MPs/ind., 82.50 %; P. ramsayi: 3.93 ± 2.91 MPs/ind., 90.60 %). While f...
Source: Aquatic Toxicology - December 30, 2023 Category: Toxicology Authors: Mariel Ojeda Guido N Rimondino Cintia P Fraysse Paula F Cossi Claudia C Boy Anal ía F Pérez Source Type: research

Historical control histopathology data from amphibian metamorphosis assays and fathead minnow fish short term reproductive assays: A tool for data interpretation
Aquat Toxicol. 2023 Dec 20;267:106811. doi: 10.1016/j.aquatox.2023.106811. Online ahead of print.ABSTRACTThe Amphibian Metamorphosis Assay (AMA) is used to determine if a tested chemical has potential to impact the hypothalamic-pituitary-thyroid (HPT) axis of Xenopus laevis tadpoles, while the Fish Short Term Reproduction Assay (FSTRA) assesses potential effects on the hypothalamic-pituitary-gonadal (HPG) axis of fish such as the fathead minnow (Pimephales promelas). Several global regulatory programs routinely require these internationally validated tests be performed to determine the potential endocrine activity of chemi...
Source: Aquatic Toxicology - December 30, 2023 Category: Toxicology Authors: Jeffrey C Wolf John W Green Valentin Mingo Joseph P Marini Suzanne Z Schneider Douglas J Fort James R Wheeler Source Type: research

The water-exiting behavior and survival of predaceous diving beetles in responses to lambda-cyhalothrin, chlorantraniliprole, and thiamethoxam
In this study, we investigated the lethal effects of lambda-cyhalothrin, chlorantraniliprole, and thiamethoxam at nominal field concentrations in 3 cm-deep water in a hypothetical paddy field (Ci,3) on adult Dytiscus sinensis Feng (Coleoptera: Dytiscidae). Lambda-cyhalothrin exhibited significant lethal effects on D. sinensis adults with its Ci,3 exceeding the 95 % confidence interval lower limits for 24, 48, 72, and 96 h- LC99. Chlorantraniliprole and thiamethoxam showed no significant lethal effects on D. sinensis adults at their respective Ci,3 at 24, 48, or 72 h. Additionally, we assessed the temporal propensity of D. ...
Source: Aquatic Toxicology - December 27, 2023 Category: Toxicology Authors: Leyun Wang Liming Liu Shiqian Feng Source Type: research