Nile tilapia (Oreochromis niloticus) show high tolerance to acute ammonia exposure but lose metabolic scope during prolonged exposure at low concentration
Aquat Toxicol. 2024 Apr 27;271:106932. doi: 10.1016/j.aquatox.2024.106932. Online ahead of print.ABSTRACTAmmonia is a respiratory gas that is produced during the process of protein deamination. In the unionised form (NH3), it readily crosses biological membranes and is highly toxic to fish. In the present study we examined the effects of unionized ammonia (UIA), on the resting oxygen consumption (MO2), ventilation frequency (fV), heart rate (HR) and heart rate variability (HRV) in Nile tilapia (Oreochromis niloticus). Fish were either exposed to progressively increasing UIA concentrations, up to 97 µM over a 5 h period, o...
Source: Aquatic Toxicology - May 1, 2024 Category: Toxicology Authors: Stephen Gyamfi Regina Esi Edziyie Kwasi Adu Obirikorang Daniel Adjei-Boateng Peter Vilhelm Skov Source Type: research
Algae-leached DOM inhibits the Hg(II) reduction and uptake by lettuce in aquatic environments under light conditions
In this study, we compared the efficiency of Hg(II) photoreduction mediated by three types of algae leaching dissolved organic matter (DOM) and humic acid (DOM-HA). Especially, we investigated the potential effects of algae-leached DOM on the photoreduction of Hg(II) and its subsequent uptake by lettuce, which serves as an indicator of Hg bioavailability for aquatic plants. The results revealed that under light conditions, the conversion of Hg(II) to Hg(0) mediated by algae-leached DOM and DOM-HA was 6.4-39.9 % higher compared to dark condition. Furthermore, the free radical quenching experiment demonstrated that the reduc...
Source: Aquatic Toxicology - April 30, 2024 Category: Toxicology Authors: Xu Yang Ruihong Yu Tantan Wang Xin Wen Yubo He Zihao Li Chi Ma Wenhao Chen Chang Zhang Source Type: research
Algae-leached DOM inhibits the Hg(II) reduction and uptake by lettuce in aquatic environments under light conditions
In this study, we compared the efficiency of Hg(II) photoreduction mediated by three types of algae leaching dissolved organic matter (DOM) and humic acid (DOM-HA). Especially, we investigated the potential effects of algae-leached DOM on the photoreduction of Hg(II) and its subsequent uptake by lettuce, which serves as an indicator of Hg bioavailability for aquatic plants. The results revealed that under light conditions, the conversion of Hg(II) to Hg(0) mediated by algae-leached DOM and DOM-HA was 6.4-39.9 % higher compared to dark condition. Furthermore, the free radical quenching experiment demonstrated that the reduc...
Source: Aquatic Toxicology - April 30, 2024 Category: Toxicology Authors: Xu Yang Ruihong Yu Tantan Wang Xin Wen Yubo He Zihao Li Chi Ma Wenhao Chen Chang Zhang Source Type: research
Ecotoxicological effects of ketoprofen and fluoxetine and their mixture in an aquatic microcosm
Aquat Toxicol. 2024 Apr 12;271:106924. doi: 10.1016/j.aquatox.2024.106924. Online ahead of print.ABSTRACTThe effects of fluoxetine (antidepressant) and ketoprofen (analgesic) on aquatic ecosystems are largely unknown, particularly as a mixture. This work aimed at determining the effect of sublethal concentrations of both compounds individually (0.050 mg/L) and their mixture (0.025 mg/L each) on aquatic communities at a microcosm scale for a period of 14 d. Several physicochemical parameters were monitored to estimate functional alterations in the ecosystem, while model organisms (Daphnia magna, Lemna sp., Raphidocelis subc...
Source: Aquatic Toxicology - April 28, 2024 Category: Toxicology Authors: Didier Ram írez-Morales Keilor Rojas-Jim énez V íctor Castro-Gutiérrez Sebasti án Rodríguez-Saravia Annette Vaglio-Garro Emanuel Araya-Valverde Carlos E Rodr íguez-Rodríguez Source Type: research
Ecotoxicological effects of ketoprofen and fluoxetine and their mixture in an aquatic microcosm
Aquat Toxicol. 2024 Apr 12;271:106924. doi: 10.1016/j.aquatox.2024.106924. Online ahead of print.ABSTRACTThe effects of fluoxetine (antidepressant) and ketoprofen (analgesic) on aquatic ecosystems are largely unknown, particularly as a mixture. This work aimed at determining the effect of sublethal concentrations of both compounds individually (0.050 mg/L) and their mixture (0.025 mg/L each) on aquatic communities at a microcosm scale for a period of 14 d. Several physicochemical parameters were monitored to estimate functional alterations in the ecosystem, while model organisms (Daphnia magna, Lemna sp., Raphidocelis subc...
Source: Aquatic Toxicology - April 28, 2024 Category: Toxicology Authors: Didier Ram írez-Morales Keilor Rojas-Jim énez V íctor Castro-Gutiérrez Sebasti án Rodríguez-Saravia Annette Vaglio-Garro Emanuel Araya-Valverde Carlos E Rodr íguez-Rodríguez Source Type: research
Maternal PFOS exposure affects offspring development in Nrf2-dependent and independent ways in zebrafish (Danio rerio)
This study aimed to investigate the effects of a preconception exposure to PFOS on developmental endpoints in offspring, as well as examine the role of the transcription factor Nuclear factor erythroid-2-related factor (Nrf2a) in mediating these effects. This transcription factor regulates the expression of several genes that protect cells against oxidative stress including during embryonic development. Adult female zebrafish were exposed to 0.02, 0.08 or 0.14 mg/L PFOS for 1 week (duration of one cycle of oocyte maturation) and then paired with unexposed males from Nrf2a mutant or wildtype strains. Embryos were collected ...
Source: Aquatic Toxicology - April 26, 2024 Category: Toxicology Authors: Marjorie Marin Kate M Annunziato Madeline C Tompach Wenle Liang Sarah M Zahn Sida Li Jeffery Doherty Jonghwa Lee John M Clark Yeonhwa Park Alicia R Timme-Laragy Source Type: research
Maternal PFOS exposure affects offspring development in Nrf2-dependent and independent ways in zebrafish (Danio rerio)
This study aimed to investigate the effects of a preconception exposure to PFOS on developmental endpoints in offspring, as well as examine the role of the transcription factor Nuclear factor erythroid-2-related factor (Nrf2a) in mediating these effects. This transcription factor regulates the expression of several genes that protect cells against oxidative stress including during embryonic development. Adult female zebrafish were exposed to 0.02, 0.08 or 0.14 mg/L PFOS for 1 week (duration of one cycle of oocyte maturation) and then paired with unexposed males from Nrf2a mutant or wildtype strains. Embryos were collected ...
Source: Aquatic Toxicology - April 26, 2024 Category: Toxicology Authors: Marjorie Marin Kate M Annunziato Madeline C Tompach Wenle Liang Sarah M Zahn Sida Li Jeffery Doherty Jonghwa Lee John M Clark Yeonhwa Park Alicia R Timme-Laragy Source Type: research
Molecular, behavioral, and growth responses of juvenile yellow catfish (Tachysurus fulvidraco) exposed to carbamazepine
This study emphasizes the necessity for improved comprehension of the effects of pharmaceutical contaminants on fish at environmentally relevant levels.PMID:38663201 | DOI:10.1016/j.aquatox.2024.106929 (Source: Aquatic Toxicology)
Source: Aquatic Toxicology - April 25, 2024 Category: Toxicology Authors: Huihui Chen Xiaohong Gu Zhigang Mao Qingfei Zeng Miao Jin Wenxia Wang Christopher J Martyniuk Source Type: research
Molecular, behavioral, and growth responses of juvenile yellow catfish (Tachysurus fulvidraco) exposed to carbamazepine
This study emphasizes the necessity for improved comprehension of the effects of pharmaceutical contaminants on fish at environmentally relevant levels.PMID:38663201 | DOI:10.1016/j.aquatox.2024.106929 (Source: Aquatic Toxicology)
Source: Aquatic Toxicology - April 25, 2024 Category: Toxicology Authors: Huihui Chen Xiaohong Gu Zhigang Mao Qingfei Zeng Miao Jin Wenxia Wang Christopher J Martyniuk Source Type: research
Reproductive toxic effects of chronic exposure to bisphenol A and its analogues in marine medaka (Oryzias melastigma)
Aquat Toxicol. 2024 Apr 17;271:106927. doi: 10.1016/j.aquatox.2024.106927. Online ahead of print.ABSTRACTAs awareness of BPA's health risks has increased, many countries and regions have implemented strict controls on its use. Consequently, bisphenol analogues like BPF and BPAF are being increasingly used as substitutes. However, these compounds are also becoming increasingly prevalent in the environment due to production, use and disposal processes. The oceans act as a repository for various pollutants, and recent studies have revealed the extensive presence of bisphenols (BPs, including BPA, BPF, BPAF, etc.) in the marin...
Source: Aquatic Toxicology - April 21, 2024 Category: Toxicology Authors: Zuchun Chen Xueyou Li Jiahao Gao Yue Liu Ning Zhang Yusong Guo Zhongduo Wang Zhongdian Dong Source Type: research
Reproductive toxic effects of chronic exposure to bisphenol A and its analogues in marine medaka (Oryzias melastigma)
Aquat Toxicol. 2024 Apr 17;271:106927. doi: 10.1016/j.aquatox.2024.106927. Online ahead of print.ABSTRACTAs awareness of BPA's health risks has increased, many countries and regions have implemented strict controls on its use. Consequently, bisphenol analogues like BPF and BPAF are being increasingly used as substitutes. However, these compounds are also becoming increasingly prevalent in the environment due to production, use and disposal processes. The oceans act as a repository for various pollutants, and recent studies have revealed the extensive presence of bisphenols (BPs, including BPA, BPF, BPAF, etc.) in the marin...
Source: Aquatic Toxicology - April 21, 2024 Category: Toxicology Authors: Zuchun Chen Xueyou Li Jiahao Gao Yue Liu Ning Zhang Yusong Guo Zhongduo Wang Zhongdian Dong Source Type: research
Reproductive toxic effects of chronic exposure to bisphenol A and its analogues in marine medaka (Oryzias melastigma)
Aquat Toxicol. 2024 Apr 17;271:106927. doi: 10.1016/j.aquatox.2024.106927. Online ahead of print.ABSTRACTAs awareness of BPA's health risks has increased, many countries and regions have implemented strict controls on its use. Consequently, bisphenol analogues like BPF and BPAF are being increasingly used as substitutes. However, these compounds are also becoming increasingly prevalent in the environment due to production, use and disposal processes. The oceans act as a repository for various pollutants, and recent studies have revealed the extensive presence of bisphenols (BPs, including BPA, BPF, BPAF, etc.) in the marin...
Source: Aquatic Toxicology - April 21, 2024 Category: Toxicology Authors: Zuchun Chen Xueyou Li Jiahao Gao Yue Liu Ning Zhang Yusong Guo Zhongduo Wang Zhongdian Dong Source Type: research
Stevioside mitigates lead toxicity in thinlip mullet juveniles: Impacts on growth, metabolism, and immune function
In conclusion, stevioside, especially at 450 mg, positively impacted growth, biochemical parameters, antioxidant activity, immune response, and gene expression in L. ramada exposed to lead, suggesting its potential to mitigate lead toxicity in aquaculture. Additional research is warranted to investigate the long-term impacts of stevioside supplementation and its prospective implementation in aquaculture.PMID:38631122 | DOI:10.1016/j.aquatox.2024.106910 (Source: Aquatic Toxicology)
Source: Aquatic Toxicology - April 17, 2024 Category: Toxicology Authors: Akram Ismael Shehata Shimaa A Shahin Ayaat M Elmaghraby Mayada Alhoshy Mohamed M Toutou Ali A Soliman Asem A Amer Yusuf Jibril Habib Mahmoud S Gewaily Islam I Teiba Mohammed F El Basuini Source Type: research
Stevioside mitigates lead toxicity in thinlip mullet juveniles: Impacts on growth, metabolism, and immune function
In conclusion, stevioside, especially at 450 mg, positively impacted growth, biochemical parameters, antioxidant activity, immune response, and gene expression in L. ramada exposed to lead, suggesting its potential to mitigate lead toxicity in aquaculture. Additional research is warranted to investigate the long-term impacts of stevioside supplementation and its prospective implementation in aquaculture.PMID:38631122 | DOI:10.1016/j.aquatox.2024.106910 (Source: Aquatic Toxicology)
Source: Aquatic Toxicology - April 17, 2024 Category: Toxicology Authors: Akram Ismael Shehata Shimaa A Shahin Ayaat M Elmaghraby Mayada Alhoshy Mohamed M Toutou Ali A Soliman Asem A Amer Yusuf Jibril Habib Mahmoud S Gewaily Islam I Teiba Mohammed F El Basuini Source Type: research
Sex-specific impacts of thimerosal on the behaviors and brain monoaminergic systems in zebrafish (Danio rerio)
In this study, zebrafish were exposed to THI for 7 days, and variations in their behavioral traits, brain monoaminergic neurotransmitter contents, and related gene expression were investigated. After the 7-day exposure, THI reduced locomotor activity and thigmotaxis in males but not females. Exposure to THI increased the social interaction between females but decreased that between males. The THI exposure also significantly reduced the serotonin (5-HT), 5-hydroxyindoleacetic acid, dopamine (DA), and 3,4-dihydroxyphenylacetic acid contents in the brain of males, but only significantly decreased the DA content in females. Co...
Source: Aquatic Toxicology - April 14, 2024 Category: Toxicology Authors: Xuchun Qiu Zhen Su Jiarui Gao Yiming Cui Kejun Dong Kun Chen Ru-Jin Zhao Songmei Wang Tao Wu Yanhong Shi Source Type: research
