Ecotoxicology最新文献_第2页

Cypermethrin induced physiological and metabolic changes in susceptible and resistant populations of Spodoptera litura (Fabricius). 氯氰菊酯对斜纹夜蛾敏感和抗性种群生理代谢的影响。

IF 2.4 4区环境科学与生态学

Ecotoxicology Pub Date : 2025-04-01 Epub Date: 2025-01-17 DOI: 10.1007/s10646-025-02850-7

Arushi Mahajan, Sanehdeep Kaur

{"title":"Cypermethrin induced physiological and metabolic changes in susceptible and resistant populations of Spodoptera litura (Fabricius).","authors":"Arushi Mahajan, Sanehdeep Kaur","doi":"10.1007/s10646-025-02850-7","DOIUrl":"10.1007/s10646-025-02850-7","url":null,"abstract":"Spodoptera litura (Lepidoptera: Noctuidae) is one of the most destructive insect pests. Insecticides remain the principal management tool to control this pest. However, indiscriminate use of insecticides has resulted in the development of resistance to a variety of insecticides in S. litura. Cypermethrin, a synthetic pyrethroid, is commonly used in pest management. In addition to the mortality produced by cypermethrin, S. litura may suffer a range of sublethal consequences when exposed to low or sublethal levels. This study investigates the effect of cypermethrin exposure on nutritional physiology, digestive, detoxifying, and antioxidant enzymes of lab-selected susceptible (Unsel-Lab) and resistant (CYP-Sel) populations of S. litura. Our findings demonstrated that cypermethrin exposure has a considerable impact on the nutritional physiology of S. litura, as revealed by altered nutrient assimilation and utilization, alongside varying responses in digestive enzymes. In the CYP-Sel population, activity levels of key digestive enzymes- α-amylase, α-glucosidase, ß-glucosidase, α-galactosidase, ß-galactosidase, lipases, and proteases- decreased by 69.30, 81.40, 49.18, 86.36, 73.94, 70.50, and 72.34%, respectively, compared to the control of Unsel-Lab population. Furthermore, detoxification enzymes including mixed-function oxidase (by 1.87 times), glutathione-S-transferase (by 1.71 times), and esterases (by 2.86 times) showed considerably increased activity in CYP-Sel population as compared to Unsel-Lab population, indicating an adaptive response to detoxification processes. Antioxidant enzyme activity, including SOD (increased by 19.66%) and CAT (decreased by 26.19%), changed significantly, indicating oxidative stress caused by cypermethrin. The study gives useful information for developing pest management strategies that reduce the unexpected impacts of chemical exposure.","PeriodicalId":11497,"journal":{"name":"Ecotoxicology","volume":" ","pages":"467-479"},"PeriodicalIF":2.4,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143002221","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multigenerational effects of individual and binary mixtures of two commonly used NSAIDs on Daphnia carinata. 两种常用非甾体抗炎药单独和二元混合对水蚤的多代效应。

IF 2.4 4区环境科学与生态学

Ecotoxicology Pub Date : 2025-04-01 Epub Date: 2025-01-05 DOI: 10.1007/s10646-024-02824-1

Helena da Silva Viana de Souza, Anupama Kumar, Dayanthi Nugegoda

{"title":"Multigenerational effects of individual and binary mixtures of two commonly used NSAIDs on Daphnia carinata.","authors":"Helena da Silva Viana de Souza, Anupama Kumar, Dayanthi Nugegoda","doi":"10.1007/s10646-024-02824-1","DOIUrl":"10.1007/s10646-024-02824-1","url":null,"abstract":"Pharmaceuticals, including non-steroidal anti-inflammatory drugs (NSAIDs) like ibuprofen (IBU) and naproxen (NPX), are widely used for medical purposes but have also become prevalent environmental contaminants. However, there is limited understanding of their effects on aquatic organisms, especially regarding multigenerational and mixture exposures. This study aimed to evaluate the toxicological impacts of ibuprofen and naproxen, individually and in combination, on three generations of Daphnia carinata, a freshwater organism. Daphnids were exposed to environmentally relevant concentrations of ibuprofen and naproxen (0.1, 0.5, 2.5 µg/L and 0.1 + 0.1, 0.1 + 0.5, 2.5 + 2.5 µg/L) throughout multiple generations. The endpoints assessed were reproduction, body size, reproduction recovery, and behaviour. The results revealed that ibuprofen and naproxen negatively impacted reproduction, reducing reproduction output across generations. Additionally, daphnids exhibited changes in body size, with significant alterations observed in the F2 and F3 generations. Male individuals and ephippium were also present at all concentrations throughout all generations. Although reproduction recovery could not be observed in daphnids after one generation in clean water, the average number of neonates was higher in a few treatments in generation F4 compared to generation F3. In addition, binary mixtures of the drugs showed synergistic effects on daphnids' reproduction for most generations. The multigenerational approach provided valuable insights into the long-term effects of these NSAIDs on reproduction success and population dynamics. This study contributes to understanding the ecotoxicity of ibuprofen and naproxen in aquatic organisms, particularly in a multigenerational context and in the presence of mixture exposures.","PeriodicalId":11497,"journal":{"name":"Ecotoxicology","volume":" ","pages":"362-380"},"PeriodicalIF":2.4,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142931000","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mercury exposure in an endangered songbird: influence of marsh hydrology and evidence for early breeding impairment. 濒危鸣禽的汞暴露：沼泽水文的影响和早期繁殖损害的证据。

IF 2.4 4区环境科学与生态学

Ecotoxicology Pub Date : 2025-04-01 Epub Date: 2025-01-13 DOI: 10.1007/s10646-025-02851-6

Alan J Mock, Thomas Virzi, Tera A Reed, Sarah E Rothenberg, Ignacio Rodríguez-Jorquera, Joel C Trexler, Peter Frederick

{"title":"Mercury exposure in an endangered songbird: influence of marsh hydrology and evidence for early breeding impairment.","authors":"Alan J Mock, Thomas Virzi, Tera A Reed, Sarah E Rothenberg, Ignacio Rodríguez-Jorquera, Joel C Trexler, Peter Frederick","doi":"10.1007/s10646-025-02851-6","DOIUrl":"10.1007/s10646-025-02851-6","url":null,"abstract":"Songbird reproductive success can decline from consuming mercury-contaminated aquatic insects, but assessments of hydrologic conditions influencing songbird mercury exposure are lacking. We monitored breast feather total mercury (THg) concentrations and reproductive success in the U.S. federally listed endangered Cape Sable Seaside Sparrow (CSSS: Ammospiza maritima mirabilis) over three breeding seasons in the Florida Everglades. We used model comparison to explore the influence of annual hydrologic variation on adult CSSS THg concentrations, and tested mercury effects on individual reproductive success (individuals' mate status, apparent nest success, and total productivity) that were scaled to estimates on population productivity using a demographic model. We identified four hydrologic models that explained annual variation in adult THg concentrations, with the top model showing a negative association between THg concentrations and drought length of the previous breeding season and a positive association between THg concentrations and dry-season water recession rate (model adjusted R2 = 0.82). Adult male mating probability declined by 63% across the range of THg concentrations observed. We found no mercury effect on CSSS nest success or total productivity. However, demographic modeling suggested the reduced mating could produce a 60% decrease in population productivity compared to a scenario with no THg impact. Our results suggest that CSSS mercury exposure is influenced by local hydrologic conditions that can increase early breeding failure (lack of breeding initiation) and potentially limit population productivity. This study is the first to describe CSSS mercury exposure and its potential reproductive costs at the individual and population levels.","PeriodicalId":11497,"journal":{"name":"Ecotoxicology","volume":" ","pages":"480-495"},"PeriodicalIF":2.4,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142970122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Pioneering investigation of long-term emamectin benzoate exposure on Labeo rohita: Insight to haemato-immuno-antioxidant biomarkers, histopathological alteration, and amino acid-fatty acid profiling. 对罗希塔Labeo长期暴露于甲维菌素苯甲酸盐的开创性研究：对血液-免疫-抗氧化生物标志物，组织病理学改变和氨基酸-脂肪酸谱的见解。

IF 2.4 4区环境科学与生态学

Ecotoxicology Pub Date : 2025-03-31 DOI: 10.1007/s10646-025-02877-w

Vikas Kumar, Himanshu Sekhar Swain, Basanta Kumar Das, Sankhajit Roy, Aurobinda Upadhyay, Mitesh Hiradas Ramteke

{"title":"Pioneering investigation of long-term emamectin benzoate exposure on Labeo rohita: Insight to haemato-immuno-antioxidant biomarkers, histopathological alteration, and amino acid-fatty acid profiling.","authors":"Vikas Kumar, Himanshu Sekhar Swain, Basanta Kumar Das, Sankhajit Roy, Aurobinda Upadhyay, Mitesh Hiradas Ramteke","doi":"10.1007/s10646-025-02877-w","DOIUrl":"https://doi.org/10.1007/s10646-025-02877-w","url":null,"abstract":"Indiscriminate use of pesticides not only pollutes the environment but also produces detrimental impacts on non-target organisms. Emamectin benzoate (EMB) is an important pesticide used for pest control in both agriculture and veterinary medicine. However, aquatic animals are endangered by the continuous influx of EMB into water bodies. The present study examined the long-term impacts of EMB on the haemato-immuno-antioxidant biomarker pattern, histopathological alteration, and amino acid-fatty acid profiling of L. rohita exposed to EMB; 0 (control), 1.82 µg L-1 (EMB1), and 9.1 µg L-1 (EMB2) for 30 days. This is the first-ever study investigating amino acid and fatty acid profiles and histopathological alterations in L. rohita subjected to EMB. The results showed that EMB exposure significantly altered biomarker levels in a dose-dependent manner. The stress biomarkers levels (SOD, catalase, GST, AST, ALT, triglyceride, glucose, and cortisol) were increased, but the immune responses like serum albumin, globulin, IgM, C3, and C4 were reduced. Histopathological observation showed that EMB incited liver, gill and kidney damage. The reduction of most amino acids is probably due to the synthesis pathway inhibition of amino acids in EMB-exposed fish. The reduced ∑PUFA proportion in treated fish was due to the susceptibility of C20:5 and C22:6 to peroxidation by EMB. In the context of ecotoxicology risk assessment, the alteration in multiple biomarkers is an adaptive response of fish exposed to EMB and that could impose risks to the natural population subjected to food quality and safety.","PeriodicalId":11497,"journal":{"name":"Ecotoxicology","volume":" ","pages":""},"PeriodicalIF":2.4,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143751569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bumblebees avoid sucrose solution containing high concentrations of Roundup. 大黄蜂避免使用含有高浓度农达的蔗糖溶液。

IF 2.4 4区环境科学与生态学

Ecotoxicology Pub Date : 2025-03-31 DOI: 10.1007/s10646-025-02878-9

Linzi Jay Thompson, Dara A Stanley, Marie Dacke, Lina Herbertsson

{"title":"Bumblebees avoid sucrose solution containing high concentrations of Roundup.","authors":"Linzi Jay Thompson, Dara A Stanley, Marie Dacke, Lina Herbertsson","doi":"10.1007/s10646-025-02878-9","DOIUrl":"https://doi.org/10.1007/s10646-025-02878-9","url":null,"abstract":"Herbicides are one of the most heavily applied groups of pesticides globally. Whilst research on herbicides in relation to bees is growing, we still have more to learn about how bees may interact with herbicides and the subsequent consequences for bee health. As herbicides are designed to kill the plants they are applied to, bees and other pollinators may interact with them in a different way to other pesticide groups which is important to understand in the context of evaluating hazard and risk. Here, we conducted both a choice and no-choice test, to determine if bumblebees would be deterred from foraging from feeders containing commercial formulations of Roundup (Ultra and Biactive, respectively) compared to controls. We found across both experiments that bees were deterred from foraging where feeders contained above field-realistic concentrations of Roundup formulation, and that on average colonies reduced their consumption from these feeders by ~50% despite lacking other food sources. This demonstrates that, when given no choice, bees can be deterred from sucrose containing Roundup Biactive, although above expected field concentrations, even to their own nutritional detriment. Separately, individual foragers were observed avoiding feeders containing field-realistic levels of Roundup Ultra compared to controls, showing a preference for uncontaminated feed when given a choice. As this was an experimental setup using high concentrations of Roundup with sucrose solution rather than real flowers, more work is needed to understand this phenomenon under field conditions. This work provides useful information and insights for future studies investigating the impacts of glyphosate in the form of both active substance and formulation on bees and could also be useful in identifying future mitigation strategies for field use.","PeriodicalId":11497,"journal":{"name":"Ecotoxicology","volume":" ","pages":""},"PeriodicalIF":2.4,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143751630","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sub-chronic level FLX exposure and biomarker response in Labeo rohita. 亚慢性水平的FLX暴露和动物标志物反应。

IF 2.4 4区环境科学与生态学

Ecotoxicology Pub Date : 2025-03-29 DOI: 10.1007/s10646-025-02881-0

M Sujitha, K Manimegalai

{"title":"Sub-chronic level FLX exposure and biomarker response in Labeo rohita.","authors":"M Sujitha, K Manimegalai","doi":"10.1007/s10646-025-02881-0","DOIUrl":"https://doi.org/10.1007/s10646-025-02881-0","url":null,"abstract":"Selective serotonin reuptake inhibitors (SSRIs) are among the most widely prescribed psychotropic medications globally used to treat depression, anxiety disorders, and related mental health conditions. Among these, Fluoxetine (FLX), recognized by its brand name Prozac, is frequently used. SSRIs increase serotonin levels in the brain, inhibiting its reuptake to enhance mood and emotional stability. However, their widespread production, consumption, and eventual environmental release are raising concerns among aquatic toxicologists and environmental biologists due to their potential impact on ecosystems and human health. This study investigated the long-term (35-days) antioxidant responses in Labeo rohita fingerlings exposed to varying concentrations of FLX (1, 10, and 100 μg/L). Compared to control groups, the activity of superoxide dismutase (SOD) in the brain significantly decreased (P < 0.05) in FLX-treated fish, except at the highest (100 μg/L) concentration on the 35th day. Similarly, catalase (CAT) and glutathione S-transferase (GST) activity were significantly reduced (P < 0.05) across all treatments. Lipid peroxidation (LPO) levels were markedly elevated in FLX-treated fishes, signifying oxidative stress. Acetylcholinesterase activity in brain tissue decreased in FLX-treated groups. These findings provide critical baseline data for molecular toxicology, highlighting the potential effects of pharmaceutical pollutants on non-target aquatic organisms.","PeriodicalId":11497,"journal":{"name":"Ecotoxicology","volume":" ","pages":""},"PeriodicalIF":2.4,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143742170","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Monitoring honeybee colonies under imidacloprid exposure based on smart beehive system. 基于智能蜂巢系统的吡虫啉暴露下蜂群监测。

IF 2.4 4区环境科学与生态学

Ecotoxicology Pub Date : 2025-03-29 DOI: 10.1007/s10646-025-02879-8

Yuntao Lu, Yinfa Yan, Zhenguo Liu, Ying Wang, Hongfang Wang, Xuepeng Chi, Xiangting Yan, Baohua Xu, Wei Hong, Shengping Liu

{"title":"Monitoring honeybee colonies under imidacloprid exposure based on smart beehive system.","authors":"Yuntao Lu, Yinfa Yan, Zhenguo Liu, Ying Wang, Hongfang Wang, Xuepeng Chi, Xiangting Yan, Baohua Xu, Wei Hong, Shengping Liu","doi":"10.1007/s10646-025-02879-8","DOIUrl":"https://doi.org/10.1007/s10646-025-02879-8","url":null,"abstract":"As crucial pollinators, honeybees play a significant role in global crop production. However, substantial honeybee colony losses have been observed in recent years, often associated with pesticide use. Despite numerous studies indicating that pesticide exposure threatens bee survival, reproduction, and pollination capabilities, our understanding of its dynamic impact at the colony level remains limited. In this study, we employed colony monitoring equipment and visual inspections to assess the health dynamics of honeybee colonies (Apis mellifera ligustica) exposed to varying concentrations of imidacloprid. Our findings revealed that both high and sub-lethal concentrations of imidacloprid negatively impacted colony population, brood rearing, foraging activities, colony weight, and temperature regulation. High concentration exposure also led to queen loss. The damage patterns varied with the concentration of imidacloprid exposure. Under low concentration exposure, colonies exhibited progressive sublethal effects, initially affecting foraging, brood care, and food intake, gradually leading to a decline in colony population, weight, and temperature. In contrast, high concentration exposure caused rapid bee mortality, directly impairing various collective activity levels, but in the short term, it reduced exposure opportunities for some bees and larvae. This study enhances our understanding of the differential impacts of imidacloprid concentrations on honeybee colonies and underscores the need for further research at the colony level.","PeriodicalId":11497,"journal":{"name":"Ecotoxicology","volume":" ","pages":""},"PeriodicalIF":2.4,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143742116","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Pyrethroid insecticide pollution of wetlands reduces amphipod density. 拟除虫菊酯类杀虫剂污染湿地降低片脚类动物密度。

IF 2.4 4区环境科学与生态学

Ecotoxicology Pub Date : 2025-03-28 DOI: 10.1007/s10646-025-02863-2

Breanna R Keith, Danelle M Larson, Carl W Isaacson, Michael J Anteau, Megan J Fitzpatrick, Jake D Carleen

{"title":"Pyrethroid insecticide pollution of wetlands reduces amphipod density.","authors":"Breanna R Keith, Danelle M Larson, Carl W Isaacson, Michael J Anteau, Megan J Fitzpatrick, Jake D Carleen","doi":"10.1007/s10646-025-02863-2","DOIUrl":"https://doi.org/10.1007/s10646-025-02863-2","url":null,"abstract":"Freshwater amphipods play a key role as forage for breeding and migrating waterfowl in wetlands throughout the Prairie Pothole Region (PPR) of North America. Amphipod populations declined in recent decades, but there is a limited understanding of mechanisms for their decline and their uneven distribution across the landscape. Row crop agriculture is abundant in the PPR, but the sensitivity of amphipods and wetland ecosystems to agrochemical pollution has rarely been studied. We investigated relationships among amphipod abundances (specifically, Gammarus lacustris and Hyalella azteca), land uses, water quality, and pyrethroid insecticide contamination of wetland sediments. Our study design targeted a large gradient of amphipod abundances and accounted for water quality, hydrology, and habitat metrics that commonly influence amphipods. We found a significant, negative relationship between pyrethroid concentrations and the abundance of the two amphipod species. Pyrethroids were detected at relatively low concentrations (<2.5 ng/g sediment) in 44% of study wetlands and occurred most frequently in intensively cropped watersheds with low vegetative filter strip coverage. Interestingly, wetlands on state and federal wildlife reserves had regular occurrence of pyrethroids, demonstrating the pervasive transport of these compounds and the intensity of agriculture in the PPR. The pyrethroids are likely entering these wetlands through overland transport during rain events or aerial spray drift, and our results show that forest patches and vegetative filter strips may reduce pyrethroid exposure to both wetlands and amphipods.","PeriodicalId":11497,"journal":{"name":"Ecotoxicology","volume":" ","pages":""},"PeriodicalIF":2.4,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143735814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mercury levels in two freshwater fishes from Panama's two largest lakes. 巴拿马两个最大湖泊中两种淡水鱼的汞含量。

IF 2.4 4区环境科学与生态学

Ecotoxicology Pub Date : 2025-03-24 DOI: 10.1007/s10646-025-02874-z

Marisol P Valverde, Diana M T Sharpe, David G Buck, Mark E Torchin, Lauren J Chapman

{"title":"Mercury levels in two freshwater fishes from Panama's two largest lakes.","authors":"Marisol P Valverde, Diana M T Sharpe, David G Buck, Mark E Torchin, Lauren J Chapman","doi":"10.1007/s10646-025-02874-z","DOIUrl":"https://doi.org/10.1007/s10646-025-02874-z","url":null,"abstract":"Mercury contamination is a global concern, yet addressing it in developing nations is particularly challenging given the scarcity of data. In 2015, along with many other countries, Panama ratified the Minamata Convention on Mercury- a global effort to tackle mercury contamination and mitigate the risks it poses to humans and the environment. However, there are currently no published data from Panama on mercury contamination in freshwater fishes nor its associated health risks to humans from fish consumption. Here, we quantify for the first time the total mercury (THg) concentrations in two predatory fish species in Panama's two largest lakes: Lake Gatun and Lake Bayano. Within Lake Gatun, the native predator Hoplias microlepis (\"pejeperro\") had significantly higher predicted mercury concentrations (341.77 ng/g wet weight for a fish of 25 cm in standard length) than the introduced Cichla monoculus (\"sargento\" or \"peacock bass\") (196.98 ng/g), and mercury concentrations increased with fish size for both species. H. microlepis from Lake Gatun also had significantly higher predicted THg concentrations than H. microlepis from Lake Bayano (168.37 ng/g). Mercury concentrations at the aquatic food web baseline did not differ between lakes, as shown by the primary consumer snails Pomacea sp. Additionally, using stable isotopes of nitrogen (δ15N), we found that mercury concentrations increased with trophic position in both lakes (resulting in positive and significant Trophic Magnification Slopes), suggesting mercury biomagnification. Based on these findings, we provide fish consumption guidelines for both lakes, using the U.S. EPA current reference dose for mercury exposure. These results provide critical data for Panama as it works towards meeting the objectives set under the Minamata Convention.","PeriodicalId":11497,"journal":{"name":"Ecotoxicology","volume":" ","pages":""},"PeriodicalIF":2.4,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143691581","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Potential synergistic effects of microplastics and zinc oxide nanoparticles: biochemical and physiological analysis on Astacus leptodactylus. 微塑料和氧化锌纳米颗粒的潜在协同效应：对细趾虾的生化和生理分析。

IF 2.4 4区环境科学与生态学

Ecotoxicology Pub Date : 2025-03-21 DOI: 10.1007/s10646-025-02872-1

Mahdi Banaee, Amir Zeidi, Amin Gholamhosseini, Reza Shakeri, Caterina Faggio, Cristiana Roberta Multisanti

{"title":"Potential synergistic effects of microplastics and zinc oxide nanoparticles: biochemical and physiological analysis on Astacus leptodactylus.","authors":"Mahdi Banaee, Amir Zeidi, Amin Gholamhosseini, Reza Shakeri, Caterina Faggio, Cristiana Roberta Multisanti","doi":"10.1007/s10646-025-02872-1","DOIUrl":"https://doi.org/10.1007/s10646-025-02872-1","url":null,"abstract":"The present study aimed to evaluate the effects of microplastics (MPs) and Zinc Oxide nanoparticles (ZnO-NPs), both individually and in combination, on the crayfish, Astacus leptodactylus. A total of 360 crayfish were assigned to eight experimental groups, including control and treatment groups exposed to MPs (polyethylene, polystyrene, and polyvinyl chloride at 300 µg/L) and ZnO-NPs (5 µg/L), individually and combined. Biochemical analyses on the haemolymph revealed a significant increase in aspartate aminotransferase, alanine aminotransferase, alkaline phosphatase, gamma glutamic transpeptidase activities, and glucose and cholesterol levels in crayfish exposed to MPs and ZnO-NPs. In contrast, butyrylcholinesterase activity was significantly decreased in all treatments compared to the control. Lactate dehydrogenase activity increased significantly in crayfish exposed to ZnO-NPs, alone or combined with MPs. Furthermore, thiol groups, total antioxidant levels, and glutathione peroxidase, glutathione reductase, catalase, and superoxide dismutase were significantly decreased, while malondialdehyde levels were increased. The integrated biomarker response (IBR) and radar plots highlighted a cumulative oxidative stress response, suggesting potential synergistic or additive interactions between MPs and ZnO-NPs.","PeriodicalId":11497,"journal":{"name":"Ecotoxicology","volume":" ","pages":""},"PeriodicalIF":2.4,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143676973","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0