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Acuña-Alonso C, Amor-Fernández M, Seoane-Martínez E, Álvarez X. The main threats facing the eel (Anguilla anguilla) and the sea lamprey (Petromyzon marinus) in Galicia (NW Spain) through Partial Least Squares Path Modelling. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024:124637. [PMID: 39084590 DOI: 10.1016/j.envpol.2024.124637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2024] [Revised: 07/26/2024] [Accepted: 07/28/2024] [Indexed: 08/02/2024]
Abstract
Migratory fish are very important species from an ecological and socioeconomic point of view, but they suffer the effects of many threats such as climate change, pollution, or overfishing, thus contributing to the decline of these species. To study the main factors influencing these species, Partial Least Squares Path Modelling (PLS-PM) methodology has been used to analyse and quantify the main threats facing two highly relevant migratory species: the eel (Anguilla anguilla) and the sea lamprey (Petromyzon marinus). Based on this statistical approach, two models have been developed for a total of 14 rivers located in the Autonomous Community of Galicia (NW Spain), one for the eel and the other for the lamprey. For the construction of the models, the influence of environmental factors, surface water quality and anthropogenic impacts on the population of these species has been studied. Two scenarios have also been simulated to assess how the application of corrective measures to reduce the anthropogenic impact implies important improvements to the eel and lamprey populations. The results of the models developed indicate that the variables analysed predict 69% of the eel "Population", with the weight of the measured variables (MV) 'Water treatment plants' having the most substantial weight (W=0.939) followed by the significant negative influence of 'Surface area of reservoirs and rivers' (W=-0.746). Similarly, in the lamprey model, an R2 of 0.58 has been obtained, where the negative influence of the MV "Agricultural nitrate discharge points" (-0.938) stands out substantially. In relation to the scenarios developed for both species, we highlight that the application of measures aimed at reducing anthropogenic pressure manages to mitigate the impact by 4.82% in the case of eel and by 1.37% in the case of lamprey. The set of models and scenarios proposed will make it possible to design preventive and corrective measures to mitigate the impacts affecting these populations, guaranteeing the integrated management of these species, and improving future decision-making, thus strengthening environmental governance.
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Affiliation(s)
- Carolina Acuña-Alonso
- CINTECX, Universidade de Vigo. Applied Geotechnologies Group, Vigo, 36310, Spain; Centro de Investigação e Tecnologias Agroambientais e Biológicas, Universidade de Trás-os-Montes e Alto Douro, Ap 1013, 5001-801 Vila Real, Portugal.
| | - Manuel Amor-Fernández
- Universidade de Vigo, Hydro-Forestry Geomodeling Research Group, School of Forestry Engineering, 36005, Pontevedra, Spain.
| | - Elena Seoane-Martínez
- Universidade de Vigo, Hydro-Forestry Geomodeling Research Group, School of Forestry Engineering, 36005, Pontevedra, Spain.
| | - Xana Álvarez
- Universidade de Vigo, Hydro-Forestry Geomodeling Research Group, School of Forestry Engineering, 36005, Pontevedra, Spain.
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Zhang Z, Wang Q, Gao X, Tang X, Xu H, Wang W, Lei X. Reproductive toxicity of cadmium stress in male animals. Toxicology 2024; 504:153787. [PMID: 38522818 DOI: 10.1016/j.tox.2024.153787] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Revised: 03/21/2024] [Accepted: 03/22/2024] [Indexed: 03/26/2024]
Abstract
Cadmium (Cd) is a common heavy metal pollutant in the environment, and the widespread use of products containing Cd compounds in industry has led to excessive levels in the environment, which enter the animal body through the food chain, thus seriously affecting the reproductive development of animals. Related studies have reported that Cd severely affects spermatogonia development and spermatogenesis in animals. In contrast, the reproductive toxicity of Cd in males and its mechanism of action have not been clarified. Therefore, this paper reviewed the toxic effects of Cd on germ cells, spermatogonia somatic cells and hypothalamic-pituitary-gonadal axis (HPG axis) of male animals and its toxic action mechanisms of oxidative stress, apoptosis and autophagy from the perspectives of cytology, genetics and neuroendocrinology. The effects of Cd stress on epigenetic modification of reproductive development in male animals were also analyzed. We hope to provide a reference for the in-depth study of the toxicity of Cd on male animal reproduction.
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Affiliation(s)
- Zikun Zhang
- College of Life Sciences, Yan'an University, Yan'an, Shaanxi 716000, China; Yan'an Key Laboratory of Ecological Restoration, Yan'an, China
| | - Qi Wang
- College of Life Sciences, Yan'an University, Yan'an, Shaanxi 716000, China; Yan'an Key Laboratory of Ecological Restoration, Yan'an, China
| | - Xiaoge Gao
- College of Life Sciences, Yan'an University, Yan'an, Shaanxi 716000, China; Yan'an Key Laboratory of Ecological Restoration, Yan'an, China
| | - Xu Tang
- College of Life Sciences, Yan'an University, Yan'an, Shaanxi 716000, China; Yan'an Key Laboratory of Ecological Restoration, Yan'an, China
| | - Huan Xu
- College of Life Sciences, Yan'an University, Yan'an, Shaanxi 716000, China; Yan'an Key Laboratory of Ecological Restoration, Yan'an, China
| | - Wenqiang Wang
- College of Life Sciences, Yan'an University, Yan'an, Shaanxi 716000, China; Yan'an Key Laboratory of Ecological Restoration, Yan'an, China.
| | - Xin Lei
- College of Life Sciences, Yan'an University, Yan'an, Shaanxi 716000, China; Yan'an Key Laboratory of Ecological Restoration, Yan'an, China.
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Pierron F, Daffe G, Daramy F, Heroin D, Barré A, Bouchez O, Clérendeau C, Romero-Ramirez A, Nikolski M. Transgenerational endocrine disruptor effects of cadmium in zebrafish and contribution of standing epigenetic variation to adaptation. JOURNAL OF HAZARDOUS MATERIALS 2023; 455:131579. [PMID: 37163897 DOI: 10.1016/j.jhazmat.2023.131579] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Revised: 04/20/2023] [Accepted: 05/03/2023] [Indexed: 05/12/2023]
Abstract
Evidence has emerged that environmentally-induced epigenetic changes can have long-lasting effects on gene transcription across generations. These recent findings highlight the need to investigate the transgenerational impacts of pollutants to assess their long term effects on populations. In this study, we investigated the transgenerational effect of cadmium on zebrafish across 4 generations. A first whole methylome approach carried out on fish of the first two generations led us to focus our investigations on the estradiol receptor alpha gene (esr1). We observed a sex-dependent transgenerational inheritance of Cd-induced DNA methylation changes up to the last generation. These changes were associated with single nucleotide polymorphisms (SNPs) that were themselves at the origin of the creation or deletion of methylation sites. Thus, Cd-induced genetic selection gave rise to DNA methylation changes. We also analyzed the transcription level of various sections of esr1 as well as estrogen responsive genes. While Cd triggered transgenerational disorders, Cd-induced epigenetic changes in esr1 contributed to the rapid transgenerational adaptation of fish to Cd. Our results provide insight into the processes underpinning rapid adaptation and highlight the need to maintain genetic diversity within natural populations to bolster the resilience of species faced with the global environmental changes.
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Affiliation(s)
- Fabien Pierron
- Univ. Bordeaux, CNRS, Bordeaux INP, EPOC, UMR 5805, F-33600 Pessac, France.
| | - Guillemine Daffe
- Univ. Bordeaux, CNRS, INRAE, La Rochelle Univ., UMS 2567 POREA, F-33615 Pessac, France
| | - Flore Daramy
- Univ. Bordeaux, CNRS, Bordeaux INP, EPOC, UMR 5805, F-33600 Pessac, France
| | - Débora Heroin
- Univ. Bordeaux, CNRS, Bordeaux INP, EPOC, UMR 5805, F-33600 Pessac, France
| | - Aurélien Barré
- Univ. Bordeaux, Bordeaux Bioinformatics Center, Bordeaux, France
| | - Olivier Bouchez
- INRAE, US 1426, GeT-PlaGe, Genotoul, Castanet-Tolosan, 31326, France
| | | | | | - Macha Nikolski
- Univ. Bordeaux, Bordeaux Bioinformatics Center, Bordeaux, France; Univ. Bordeaux, CNRS, IBGC, UMR 5095, Bordeaux 33077, France
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Kljaković-Gašpić Z, Dvoršćak M, Orct T, Sekovanić A, Klinčić D, Jagić K, Šebešćen D, Klasiček E, Zanella D. Metal(loid)s and persistent organic pollutants in yellow European eel from the Raša River, Croatia. MARINE POLLUTION BULLETIN 2023; 187:114527. [PMID: 36608477 DOI: 10.1016/j.marpolbul.2022.114527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 11/25/2022] [Accepted: 12/20/2022] [Indexed: 06/17/2023]
Abstract
The anthropogenic impact on the aquatic environment of the Raša River (Croatia) was investigated through the analysis of seven polybrominated diphenyl ethers (PBDEs), seven polychlorinated biphenyls (PCBs), three DDT isomers, and 22 major and trace elements using yellow European eel (Anguilla anguilla L.) as a biological indicator of contamination. The obtained data indicated generally low contamination status in the surrounding area. Levels of all organic contaminants in muscle significantly increased with lipid content, length, weight and body condition. In both muscle and liver, most metal(loid)s decreased or remained unchanged with increasing size, while at downstream location only several elements (Cd, Cu, Fe, Na, Se, U, V, Zn) accumulated in the liver with fish growth. Spatial analysis revealed higher pressure of Ag, Cd, Cr, Mo, Tl, U, and V at the downstream location, revealing the potentially limited impact of historical coal mining industry on the lower reaches of the Raša River.
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Affiliation(s)
- Zorana Kljaković-Gašpić
- Institute for Medical Research and Occupational Health, Ksaverska cesta 2, 10 000 Zagreb, Croatia
| | - Marija Dvoršćak
- Institute for Medical Research and Occupational Health, Ksaverska cesta 2, 10 000 Zagreb, Croatia.
| | - Tatjana Orct
- Institute for Medical Research and Occupational Health, Ksaverska cesta 2, 10 000 Zagreb, Croatia
| | - Ankica Sekovanić
- Institute for Medical Research and Occupational Health, Ksaverska cesta 2, 10 000 Zagreb, Croatia
| | - Darija Klinčić
- Institute for Medical Research and Occupational Health, Ksaverska cesta 2, 10 000 Zagreb, Croatia
| | - Karla Jagić
- Institute for Medical Research and Occupational Health, Ksaverska cesta 2, 10 000 Zagreb, Croatia
| | - Dora Šebešćen
- Institute for Medical Research and Occupational Health, Ksaverska cesta 2, 10 000 Zagreb, Croatia; University of Zagreb, Faculty of Science, Department of Biology, Rooseveltov trg 6, 10 000 Zagreb, Croatia
| | - Elena Klasiček
- Institute for Medical Research and Occupational Health, Ksaverska cesta 2, 10 000 Zagreb, Croatia; University of Zagreb, Faculty of Science, Department of Biology, Rooseveltov trg 6, 10 000 Zagreb, Croatia
| | - Davor Zanella
- University of Zagreb, Faculty of Science, Department of Biology, Rooseveltov trg 6, 10 000 Zagreb, Croatia
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5
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Germande O, Beaufils F, Daffe G, Gonzalez P, Mornet S, Bejko M, Errera MH, Lacomme S, Gontier E, Guibert C, Baudrimont I, Baudrimont M. Cellular and molecular mechanisms of NiONPs toxicity on eel hepatocytes HEPA-E1: An illustration of the impact of Ni release from mining activity in New Caledonia. CHEMOSPHERE 2022; 303:135158. [PMID: 35640691 DOI: 10.1016/j.chemosphere.2022.135158] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2022] [Revised: 05/25/2022] [Accepted: 05/26/2022] [Indexed: 06/15/2023]
Abstract
Anthropic activities such as open pit mining, amplify the natural erosion of metals contained in the soils, particularly in New Caledonia, leading to atmospheric emission of nickel oxide nanoparticles (NiONPs). These particles are produced during extraction end up in aquatic ecosystems through deposition or leaching in the rivers. Despite alarming freshwater Ni concentrations, only few studies have focused on the cellular and molecular mechanisms of NiONPs toxicity on aquatic organisms and particularly on eels. Those fish are known to be sensitive to metal contamination, especially their liver, which is a key organ for lipid metabolism, detoxification and reproduction. The objective of this study was to assess in vitro the cytotoxic effects of NiONPs on Anguilla japonica hepatocytes, HEPA-E1. HEPA-E1 were exposed to NiONPs (0.5-5 μg/cm2) for 4 or 24 h. Several endpoints were studied: (i) viability, (ii) ROS production, SOD activity and selected anti-oxidant genes expression, (iii) inflammation, (iv) calcium signalling, (v) mitochondrial function and (vi) apoptosis. The results evidenced that NiONPs induce a decrease of cell viability and an increase in oxidative stress with a significant superoxide anion production. An increase of mitochondrial calcium concentration and a decrease of mitochondrial membrane potential were observed, leading to apoptosis. These results underline the potential toxic impact of NiONPs on eels living in mining areas. Therefore, eel exposure to NiONPs can affect their migration and reproduction in New Caledonia.
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Affiliation(s)
- Ophélie Germande
- Univ. Bordeaux, 146, rue Léo Saignat, Bordeaux, F-33076, France; Inserm U 1045, Centre de Recherche Cardio-Thoracique, avenue du Haut Lêveque, Pessac, F-33604, France; Univ. Bordeaux, CNRS, EPHE, UMR EPOC 5805, F-33615, Pessac, France
| | - Fabien Beaufils
- Univ. Bordeaux, 146, rue Léo Saignat, Bordeaux, F-33076, France; Inserm U 1045, Centre de Recherche Cardio-Thoracique, avenue du Haut Lêveque, Pessac, F-33604, France; CHU de Bordeaux, Service d'exploration fonctionnelle respiratoire, Service de Pédiatrie médicale, Bordeaux, F-33076, France
| | - Guillemine Daffe
- Univ. Bordeaux, CNRS, Observatoire Aquitain des Sciences de l'Univers, UAR 2567 POREA, F-33615, Pessac, France
| | - Patrice Gonzalez
- Univ. Bordeaux, 146, rue Léo Saignat, Bordeaux, F-33076, France; Univ. Bordeaux, CNRS, EPHE, UMR EPOC 5805, F-33615, Pessac, France
| | - Stéphane Mornet
- Univ. Bordeaux, CNRS, Bordeaux INP, ICMCB, UMR 5026, F-33076, Bordeaux, France
| | - Megi Bejko
- Univ. Bordeaux, CNRS, Bordeaux INP, ICMCB, UMR 5026, F-33076, Bordeaux, France
| | - Marie-Hélène Errera
- Department of Ophthalmology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Sabrina Lacomme
- Univ. Bordeaux, 146, rue Léo Saignat, Bordeaux, F-33076, France; Univ. Bordeaux, CNRS, INSERM, Bordeaux Imaging Center, BIC, UAR CNRS 3420, US 004, F-33000, Bordeaux, France
| | - Etienne Gontier
- Univ. Bordeaux, 146, rue Léo Saignat, Bordeaux, F-33076, France; Univ. Bordeaux, CNRS, INSERM, Bordeaux Imaging Center, BIC, UAR CNRS 3420, US 004, F-33000, Bordeaux, France
| | - Christelle Guibert
- Inserm U 1045, Centre de Recherche Cardio-Thoracique, avenue du Haut Lêveque, Pessac, F-33604, France
| | - Isabelle Baudrimont
- Univ. Bordeaux, 146, rue Léo Saignat, Bordeaux, F-33076, France; Inserm U 1045, Centre de Recherche Cardio-Thoracique, avenue du Haut Lêveque, Pessac, F-33604, France
| | - Magalie Baudrimont
- Univ. Bordeaux, 146, rue Léo Saignat, Bordeaux, F-33076, France; Univ. Bordeaux, CNRS, EPHE, UMR EPOC 5805, F-33615, Pessac, France.
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6
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Germande O, Gunkel-Grillon P, Dominique Y, Feurtet-Mazel A, Bierque E, Dassié E, Daffe G, Pierron F, Baudrimont I, Baudrimont M. Impact of nickel mining in New Caledonia on marbled eels Anguilla marmorata. JOURNAL OF HAZARDOUS MATERIALS 2022; 436:129285. [PMID: 35739794 DOI: 10.1016/j.jhazmat.2022.129285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 05/23/2022] [Accepted: 05/31/2022] [Indexed: 06/15/2023]
Abstract
New Caledonia is particularly affected by nickel open pit mining activities because of the presence of ultramafic soils rich in metals. The particles dispersed by atmospheric transport and soil erosion during the excavation of nickel end up by deposition or leaching in rivers where they may be bioaccumulated by organisms living downstream the mines. Despite alarming freshwater metals concentrations, no study investigated the level of their bioaccumulation in eels, and if high bioaccumulation levels occur, the potential consequences on their health. The aim of this study was to determine how eels Anguilla marmorata are impacted in situ by metals issued from mining activity by measuring: morphometric parameters; metal concentrations in tissues and organs and transcription levels of target genes encoding proteins involved in several metabolic key functions. Among organs, liver was found to be the most affected by mining with average nickel concentrations of 5.14 mg/kg versus 1.63 mg/kg for eels away from mines leading to dysregulation of numerous genes involved in oxidative stress, DNA repair, apoptosis, reproduction and both lipid and mitochondrial metabolisms. This study should allow us to define in an integrated way if metals released by mining activities influence metals bioaccumulation in eels and induce biological effects.
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Affiliation(s)
- Ophélie Germande
- Université de Bordeaux, 146, rue Léo Saignat, Bordeaux F-33076, France; Inserm U1045, Centre de Recherche Cardio-Thoracique, avenue du Haut Lêveque, Pessac F-33604, France; Université de Bordeaux, CNRS, EPHE, UMR EPOC 5805, Place du Dr Peyneau, Arcachon F-33120, France
| | - Peggy Gunkel-Grillon
- Institut des Sciences Exactes et Appliquées, ISEA, Université de la Nouvelle-Calédonie BPR4, 98851 Cedex Noumea, New Caledonia
| | | | - Agnès Feurtet-Mazel
- Université de Bordeaux, 146, rue Léo Saignat, Bordeaux F-33076, France; Université de Bordeaux, CNRS, EPHE, UMR EPOC 5805, Place du Dr Peyneau, Arcachon F-33120, France
| | - Emilie Bierque
- Institut des Sciences Exactes et Appliquées, ISEA, Université de la Nouvelle-Calédonie BPR4, 98851 Cedex Noumea, New Caledonia
| | - Emilie Dassié
- Université de Bordeaux, 146, rue Léo Saignat, Bordeaux F-33076, France; Université de Bordeaux, CNRS, EPHE, UMR EPOC 5805, Place du Dr Peyneau, Arcachon F-33120, France
| | - Guillemine Daffe
- Univ. Bordeaux, CNRS, Observatoire Aquitain des Sciences de l'Univers, UAR 2567 POREA, Pessac F-33615, France
| | - Fabien Pierron
- Université de Bordeaux, 146, rue Léo Saignat, Bordeaux F-33076, France; Université de Bordeaux, CNRS, EPHE, UMR EPOC 5805, Place du Dr Peyneau, Arcachon F-33120, France
| | - Isabelle Baudrimont
- Université de Bordeaux, 146, rue Léo Saignat, Bordeaux F-33076, France; Inserm U1045, Centre de Recherche Cardio-Thoracique, avenue du Haut Lêveque, Pessac F-33604, France
| | - Magalie Baudrimont
- Université de Bordeaux, 146, rue Léo Saignat, Bordeaux F-33076, France; Université de Bordeaux, CNRS, EPHE, UMR EPOC 5805, Place du Dr Peyneau, Arcachon F-33120, France.
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7
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Schäfer J, Coynel A, Blanc G. Impact of metallurgy tailings in a major European fluvial-estuarine system: Trajectories and resilience over seven decades. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 805:150195. [PMID: 34537694 DOI: 10.1016/j.scitotenv.2021.150195] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Revised: 08/27/2021] [Accepted: 09/03/2021] [Indexed: 06/13/2023]
Abstract
Tailings containing mining and ore treatment waste, accumulated over long time periods are major contaminant sources at the watershed scale and may seriously impair environmental quality of river-sea continuums. A critical review of existing work in different disciplines addressing the multi-metal contamination of the Gironde Watershed, a major fluvial-estuarine model system representative of many other systems worldwide, has provided a condensed, yet pertinent overview on various aspects of this environmental problem. Combining long-term observation and contamination records from different environmental archives, there is a clear trend towards resilience for the main historical contaminants (Cd, Zn, Pb and Cu), yet suggesting that resilience needs appropriate management of both, tailings as the initial source and contaminated sediments acting as temporary metal traps which may transform into delayed sources. Contaminated sediment management is an increasingly important challenge due to (i) successful remediation at the contamination source itself (ii) global-change induced factors and strategies and (iii) lacking coordination of actions between upstream and downstream parts of the fluvial-estuarine continuum. Less studied and emerging metallic contaminants show recent trends in sediments and biota that are decoupled from the legacy contaminant trajectories due to recent sources and applications, suggesting that further work is needed to assess their potential impact on the environmental quality of the Gironde fluvial-estuarine system and that of other systems, especially in a context of worldwide rapidly growing mining activity and metal use.
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Affiliation(s)
- Jörg Schäfer
- University of Bordeaux, UMR EPOC 5805, Allée Geoffroy St Hilaire, 33615 Pessac CEDEX, France.
| | - Alexandra Coynel
- University of Bordeaux, UMR EPOC 5805, Allée Geoffroy St Hilaire, 33615 Pessac CEDEX, France
| | - Gérard Blanc
- University of Bordeaux, UMR EPOC 5805, Allée Geoffroy St Hilaire, 33615 Pessac CEDEX, France
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Demirak A, Keskin F, Silm M, Özdemir N, Yıldız D, Bernotas P, Öğlü B. Bioaccumulation and health risk assessment of heavy metals in European eels taken from Lakes Köyceğiz (Turkey) and Võrtsjärv (Estonia). ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:1620-1633. [PMID: 34677773 DOI: 10.1007/s11356-021-16822-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Accepted: 09/26/2021] [Indexed: 06/13/2023]
Abstract
Monitoring heavy metal contaminants in fish is important for the assessment of environmental quality as well as food safety. In this study, European eel samples were collected from Lake Köyceğiz and Lake Võrtsjärv in 2017 and 2018. The concentrations of Mn, Cd, Zn, Pb, and Cu metals were measured by using GF-AAS in four selected tissues of eel, including liver, gill, skin, and muscle in both lakes. The pollution index (Pi, MPI) values were calculated for both lakes and the health risk for consumers was assessed for both adults and children in Turkey and Estonia. The estimated weekly intake (EWI), hazard index (HI), and lifetime cancer risk values (CRs) for the metals were calculated for both lakes. According to the results of this study, a significant difference was determined between the metal concentrations (especially Cu, Cd, and Pb) in the tissues of the eel samples taken from the two lakes. These results show that besides the pollution levels in the aquatic environment, physiological needs and metabolic activities in different habitats have a significant effect on metal accumulation in eels. In addition, HI was found to be < 1 for both adult and child consumers in both lakes, which indicates that consumers would not experience non-carcinogenic health effects. However, the values of CR for Pb and Cd were found negligible in Lake Köyceğiz, while the CR value for Pb was found to be very close to the danger limits in Lake Võrtsjärv.
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Affiliation(s)
- Ahmet Demirak
- Department of Chemistry, Faculty of Science, Mugla Sıtkı Kocman University, Mugla, Turkey.
| | - Feyyaz Keskin
- Environmental Problems Research and Application Center, Mugla Sıtkı Kocman University, Mugla, Turkey
| | - Maidu Silm
- Chair of Hydrobiology and Fishery, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi 5, 51006, Tartu, Estonia
| | - Nedim Özdemir
- Aquaculture Faculty, Mugla Sıtkı Kocman University, 48000, Mugla, Turkey
| | - Dilek Yıldız
- Environmental Problems Research and Application Center, Mugla Sıtkı Kocman University, Mugla, Turkey
| | - Priit Bernotas
- Chair of Hydrobiology and Fishery, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi 5, 51006, Tartu, Estonia
- Estonian Marine Institute, University of Tartu, Vanemuise 46a, 51010, Tartu, Estonia
| | - Burak Öğlü
- Chair of Hydrobiology and Fishery, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi 5, 51006, Tartu, Estonia
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Pierron F, Lorioux S, Héroin D, Daffe G, Etcheverria B, Cachot J, Morin B, Dufour S, Gonzalez P. Transgenerational epigenetic sex determination: Environment experienced by female fish affects offspring sex ratio. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 277:116864. [PMID: 33714788 DOI: 10.1016/j.envpol.2021.116864] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 02/22/2021] [Accepted: 02/27/2021] [Indexed: 06/12/2023]
Abstract
Sex determination is a complex process that can be influenced by environment in various taxa. Disturbed environments can affect population sex ratios and thus threaten their viability. Emerging evidences support a role of epigenetic mechanisms, notably DNA methylation, in environmental sex determination (ESD). In this work, using zebrafish as model and a transgenerational experiment comprising 4 successive generations, we report a strength link between the promotor methylation level of three genes in female gonads and population sex ratio. One generation of zebrafish was exposed throughout its lifetime to cadmium (Cd), a non-essential metal, at an environmentally relevant concentration. The subsequent generations were not exposed. At the first and the third generation a subset of individuals was exposed to an elevated temperature, a well-known masculinizing factor in zebrafish. While heat was associated to an increase in the methylation level of cyp19a1a gene and population masculinization, foxl2a/dmrt1 methylation levels appeared to be influenced by Cd and fish density leading to offspring feminization. Ancestral Cd exposure indeed led to a progressive feminization of the population over generations and affected the sex plastic response of zebrafish in response to heat. The effect of Cd on the methylation level of foxl2a was observed until the third generation, supporting potential transgenerational inheritance. Our results support (i) a key role of cyp19a1a methylation in SD in zebrafish in response to environmental cues and (ii) the fact that the environment experienced by parents, namely mothers in the present case, can affect their offspring sex ratio via environment-induced DNA methylation changes in gonads.
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Affiliation(s)
- Fabien Pierron
- Univ. Bordeaux, CNRS, EPOC, EPHE, UMR 5805, F-33600, Pessac, France.
| | - Sophie Lorioux
- Univ. Bordeaux, CNRS, EPOC, EPHE, UMR 5805, F-33600, Pessac, France
| | - Débora Héroin
- Univ. Bordeaux, CNRS, EPOC, EPHE, UMR 5805, F-33600, Pessac, France
| | - Guillemine Daffe
- Univ. Bordeaux, CNRS, INRAE, La Rochelle Univ., UMS 2567 POREA, F-33615, Pessac, France
| | | | - Jérôme Cachot
- Univ. Bordeaux, CNRS, EPOC, EPHE, UMR 5805, F-33600, Pessac, France
| | - Bénédicte Morin
- Univ. Bordeaux, CNRS, EPOC, EPHE, UMR 5805, F-33600, Pessac, France
| | - Sylvie Dufour
- Laboratory Biology of Aquatic Organisms and Ecosystems (BOREA), Muséum National D'Histoire Naturelle, CNRS, IRD, Sorbonne Université, Université de Caen Normandie, Université des Antilles, 75231, Paris Cedex, 05, France
| | - Patrice Gonzalez
- Univ. Bordeaux, CNRS, EPOC, EPHE, UMR 5805, F-33600, Pessac, France
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10
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Nowosad J, Kucharczyk D, Szmyt M, Łuczynska J, Tamás M, Horváth L. Changes in Cadmium Concentration in Muscles, Ovaries, and Eggs of Silver European Eel ( Anguilla anguilla) during Maturation under Controlled Conditions. Animals (Basel) 2021; 11:1027. [PMID: 33916407 PMCID: PMC8066507 DOI: 10.3390/ani11041027] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2021] [Revised: 03/30/2021] [Accepted: 04/02/2021] [Indexed: 12/23/2022] Open
Abstract
This study determined the contents of cadmium (Cd) in the muscles, ovaries, and eggs of silver female European eels. The analysis of cadmium content was performed on female European eels caught during commercial fishing in freshwater in Warmia and Mazury (Poland), and then subjected to artificial maturation and ovulation processing under controlled conditions. The content of cadmium (Cd) in the tissues was determined by flameless atomic spectrometry using an electrothermal atomizer. The analysis showed statistically significant differences between the cadmium content in the muscles, ovaries, and eggs (p < 0.05) of female European eels. The lowest cadmium content was found in the muscle tissue (0.0012 ± 0.0001 mg kg-1 wet weight) and the highest in eggs (after ovulation) (0.0038 ± 0.0007 mg kg-1 wet weight). Moreover, a relationship was found between the cadmium content in the muscle tissue and the ovaries (R = 0.673; p = 0.0117) in the same fish. The movement of cadmium from tissues to oocytes may indicate a significant problem concerning this heavy metal content in the reproduction of European eel.
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Affiliation(s)
- Joanna Nowosad
- Department of Ichthyology and Aquaculture, Faculty of Animal Bioengineering, University of Warmia and Mazury, 10-719 Olsztyn, Poland; (J.N.); (M.S.)
- ChemProf, 11-041 Olsztyn, Poland
| | - Dariusz Kucharczyk
- Department of Ichthyology and Aquaculture, Faculty of Animal Bioengineering, University of Warmia and Mazury, 10-719 Olsztyn, Poland; (J.N.); (M.S.)
| | - Mariusz Szmyt
- Department of Ichthyology and Aquaculture, Faculty of Animal Bioengineering, University of Warmia and Mazury, 10-719 Olsztyn, Poland; (J.N.); (M.S.)
| | - Joanna Łuczynska
- Department of Commodity and Food Analysis, University of Warmia and Mazury, 10-726 Olsztyn, Poland;
| | - Müller Tamás
- Department of Freshwater Fish Ecology, Hungarian University of Agricultural and Life Sciences, 2100 Gödöllő, Hungary;
| | - László Horváth
- Department of Aquaculture, Hungarian University of Agricultural and Life Sciences, 2100 Gödöllő, Hungary;
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11
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Baudrimont M, Gonzalez P, Mesmer-Dudons N, Legeay A. Sensitivity to cadmium of the endangered freshwater pearl mussel Margaritifera margaritifera from the Dronne River (France): experimental exposure. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:3715-3725. [PMID: 30949944 DOI: 10.1007/s11356-019-05025-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Accepted: 03/27/2019] [Indexed: 06/09/2023]
Abstract
Margaritifera margaritifera is a critically endangered species in Europe. Among the causes explaining its decline, metal pollution had never been deeply studied. Thus, an ecotoxicological investigation was developed on this species which comes from the Dronne River (South-West of France). Cadmium (Cd) exposure of mussels at 2 and 5 μg/L for 7 days was conducted to test their vulnerability to this metal, and also the potential endocrine disruption power of Cd. Morphometric analyses, gonad histological observations, metal bioaccumulation, metallothionein (MTs) production, measures of malondialdehyde (MDA), and finally quantitative relative expression analysis of genes involved in various metabolic functions were performed.The main results showed Cd accumulation increasing in a dose-dependent manner, especially in the gills. The same trend was observed for gene expression relative to oxidative stress. Histological analysis of the gonads highlighted a predominance of hermaphrodite individuals, but after 7 days of exposure to Cd, the percentage of female was largely increased compared with controls, from 17 to 33%. These results demonstrate the endocrine disruption effect of Cd on freshwater pearl mussels.The pearl mussel Margaritifera margaritifera is sensitive to cadmium since the metallothioneins are poorly induced, gene expression reveals oxidative stress, and gonads tend to be feminized.
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Affiliation(s)
- Magalie Baudrimont
- University of Bordeaux, UMR CNRS EPOC 5805, Aquatic Ecotoxicology team, Place du Dr Peyneau, F-33120, Arcachon, France.
| | - Patrice Gonzalez
- University of Bordeaux, UMR CNRS EPOC 5805, Aquatic Ecotoxicology team, Place du Dr Peyneau, F-33120, Arcachon, France
| | - Nathalie Mesmer-Dudons
- University of Bordeaux, UMR CNRS EPOC 5805, Aquatic Ecotoxicology team, Place du Dr Peyneau, F-33120, Arcachon, France
| | - Alexia Legeay
- University of Bordeaux, UMR CNRS EPOC 5805, Aquatic Ecotoxicology team, Place du Dr Peyneau, F-33120, Arcachon, France
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12
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Freese M, Rizzo LY, Pohlmann JD, Marohn L, Witten PE, Gremse F, Rütten S, Güvener N, Michael S, Wysujack K, Lammers T, Kiessling F, Hollert H, Hanel R, Brinkmann M. Bone resorption and body reorganization during maturation induce maternal transfer of toxic metals in anguillid eels. Proc Natl Acad Sci U S A 2019; 116:11339-11344. [PMID: 31085642 PMCID: PMC6561237 DOI: 10.1073/pnas.1817738116] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
During their once-in-a-lifetime transoceanic spawning migration, anguillid eels do not feed, instead rely on energy stores to fuel the demands of locomotion and reproduction while they reorganize their bodies by depleting body reserves and building up gonadal tissue. Here we show how the European eel (Anguilla anguilla) breaks down its skeleton to redistribute phosphorus and calcium from hard to soft tissues during its sexual development. Using multiple analytical and imaging techniques, we characterize the spatial and temporal degradation of the skeletal framework from initial to final gonadal maturation and use elemental mass ratios in bone, muscle, liver, and gonadal tissue to determine the fluxes and fates of selected minerals and metals in the eels' bodies. We find that bone loss is more pronounced in females than in males and eventually may reach a point at which the mechanical stability of the skeleton is challenged. P and Ca are released and translocated from skeletal tissues to muscle and gonads, leaving both elements in constant proportion in remaining bone structures. The depletion of internal stores from hard and soft tissues during maturation-induced body reorganization is accompanied by the recirculation, translocation, and maternal transfer of potentially toxic metals from bone and muscle to the ovaries in gravid females, which may have direct deleterious effects on health and hinder the reproductive success of individuals of this critically endangered species.
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Affiliation(s)
- Marko Freese
- Thünen Institute of Fisheries Ecology, Federal Research Institute for Rural Areas, Forestry and Fisheries, 27572 Bremerhaven, Germany;
| | - Larissa Yokota Rizzo
- Institute for Experimental Molecular Imaging, RWTH Aachen University, 52056 Aachen, Germany
| | - Jan-Dag Pohlmann
- Thünen Institute of Fisheries Ecology, Federal Research Institute for Rural Areas, Forestry and Fisheries, 27572 Bremerhaven, Germany
| | - Lasse Marohn
- Thünen Institute of Fisheries Ecology, Federal Research Institute for Rural Areas, Forestry and Fisheries, 27572 Bremerhaven, Germany
| | - Paul Eckhard Witten
- Research Group Evolutionary Developmental Biology, Biology Department, Ghent University, 900 Ghent, Belgium
| | - Felix Gremse
- Institute for Experimental Molecular Imaging, RWTH Aachen University, 52056 Aachen, Germany
| | - Stephan Rütten
- Institute for Pathology, RWTH Aachen University, 52074 Aachen, Germany
- Electron Microscopy Facility, RWTH Aachen University Clinic, 52074 Aachen, Germany
| | - Nihan Güvener
- Institute for Experimental Molecular Imaging, RWTH Aachen University, 52056 Aachen, Germany
| | - Sabrina Michael
- Institute of Hygiene and Environmental Medicine, RWTH University, 52074 Aachen, Germany
| | - Klaus Wysujack
- Thünen Institute of Fisheries Ecology, Federal Research Institute for Rural Areas, Forestry and Fisheries, 27572 Bremerhaven, Germany
| | - Twan Lammers
- Institute for Experimental Molecular Imaging, RWTH Aachen University, 52056 Aachen, Germany
| | - Fabian Kiessling
- Institute for Experimental Molecular Imaging, RWTH Aachen University, 52056 Aachen, Germany
| | - Henner Hollert
- Department of Ecosystem Analysis, Institute for Environmental Research, RWTH Aachen University, 52074 Aachen, Germany
| | - Reinhold Hanel
- Thünen Institute of Fisheries Ecology, Federal Research Institute for Rural Areas, Forestry and Fisheries, 27572 Bremerhaven, Germany
| | - Markus Brinkmann
- Department of Ecosystem Analysis, Institute for Environmental Research, RWTH Aachen University, 52074 Aachen, Germany
- School of Environment and Sustainability, University of Saskatchewan, Saskatoon, SK, Canada S7N 5B3
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13
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Chukwuka A, Ogbeide O, Uhunamure G. Gonad pathology and intersex severity in pelagic (Tilapia zilli) and benthic (Neochanna diversus and Clarias gariepinus) species from a pesticide-impacted agrarian catchment, south-south Nigeria. CHEMOSPHERE 2019; 225:535-547. [PMID: 30901648 DOI: 10.1016/j.chemosphere.2019.03.073] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2018] [Revised: 03/10/2019] [Accepted: 03/11/2019] [Indexed: 05/21/2023]
Abstract
Pesticides are distributed to different degrees in surface water and sediment, thus, risks of toxicity and adverse impacts to physiology of resident species could be determined by their microhabitat (sub-habitat) associations, either water column or sediment. River Owan receives pesticide input from diffuse sources from adjacent farmlands. Surface water, sediment and fish samples [(Pelagic: Tilapia zilli (n = 92) and benthic: Neochanna diversus (n = 59), Clarias gariepinus (n = 68) were collected within the catchment area across seasons for 18-months (August 2016-January 2018) and measured for pesticide levels. Testicular and Ovarian tissue samples across the three species were also examined for pathological alterations. Individual pesticide concentrations in surface water and sediment exceeded international allowable limits, while concentration of pesticide residues in tissues of benthic species was higher compared to pelagic fish. Histopathological assessment revealed a higher incidence of ovarian disruption including atretic follicles, intersex and disorganization of ovarian structure in benthic (bottom-dwelling) fish (C. gariepinus and N. diversus) compared to pelagic (water-column) fish (T. zilli). Males benthic fish species also recorded more severe anomalies, compared to pelagic fish. The damages and anomalies observed in ovarian and testicular tissue indicate chronic responses to pollutant exposure, and implicates the elevation of pesticide concentrations in surface water and sediment above permissible limits. The higher incidence of anomalies recorded for benthic species compared to pelagic species, indicates greater risks of reproductive disruption and could be associated with the microhabitat preferences (water-column or sediment).
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Affiliation(s)
- Azubuike Chukwuka
- Department of Environmental Quality Control (EQC), Conservation Unit, National Environmental Standards and Regulations Enforcement Agency (NESREA), Nigeria.
| | - Ozekeke Ogbeide
- Department of Environmental Management and Toxicology, Faculty of Life Sciences, University of Benin, Benin City, Nigeria; Ecotoxicology Unit, Department of Entomology and Zoology, University of the Free State, Qwa Qwa, Free State, South Africa
| | - Grace Uhunamure
- Department of Environmental Management and Toxicology, Faculty of Life Sciences, University of Benin, Benin City, Nigeria
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14
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Sow AY, Ismail A, Zulkifli SZ, Amal MN, Hambali KA. Survey on Heavy Metals Contamination and Health Risk Assessment in Commercially Valuable Asian Swamp Eel, Monopterus albus from Kelantan, Malaysia. Sci Rep 2019; 9:6391. [PMID: 31015502 PMCID: PMC6478920 DOI: 10.1038/s41598-019-42753-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Accepted: 04/08/2019] [Indexed: 12/27/2022] Open
Abstract
This work investigates the metals concentration in the tissues of Asian swamp eel, Monopterus albus. Five selected tissues, including liver, gill, bone, skin, and muscle were examined for the concentration of Zn, Cu, Cd, Pb, and Ni. The concentrations of Cd and Pb were found high in the muscle tissues of the eels. Additionally, high amounts of Zn and Cu metals were observed in the liver, whereas the Cd, Pb, and Ni metals were highly detected in gill. The accumulation of Zn, Cu, Cd, Pb, and Ni in both skin and bone of the eel seems to vary between seasons. Low levels of Zn, Cu, and Ni were identified in the muscle tissues of the eels. This study revealed that the concentration of Cd and Pb in the muscle tissues of Asian swamp eels exceeded the permissible limits by the US EPA, suggesting the consumption of the muscle may be hazardous and can severely affect one’s health.
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Affiliation(s)
- Ai Yin Sow
- Faculty of Agro-Based Industry, Universiti Malaysia Kelantan, Jeli Campus, Locked Bag No. 100, 17600, Jeli, Kelantan, Malaysia.
| | - Ahmad Ismail
- Biology Department, Faculty of Science, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia
| | - Syaizwan Zahmir Zulkifli
- Biology Department, Faculty of Science, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia
| | - Mohammad Noor Amal
- Biology Department, Faculty of Science, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia
| | - Kamarul Ariffin Hambali
- Faculty of Earth Science, Universiti Malaysia Kelantan, Jeli Campus, Locked Bag No. 100, 17600, Jeli, Kelantan, Malaysia
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15
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Pandey M, Pandey AK, Mishra A, Tripathi B. Assessment of metal bioaccumulation in Mastacembelus armatus (eel) and exposure evaluation in human. ACTA ACUST UNITED AC 2017. [DOI: 10.1016/j.enmm.2017.02.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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16
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Pannetier P, Caron A, Campbell PGC, Pierron F, Baudrimont M, Couture P. A comparison of metal concentrations in the tissues of yellow American eel (Anguilla rostrata) and European eel (Anguilla anguilla). THE SCIENCE OF THE TOTAL ENVIRONMENT 2016; 569-570:1435-1445. [PMID: 27395077 DOI: 10.1016/j.scitotenv.2016.06.232] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Revised: 06/22/2016] [Accepted: 06/29/2016] [Indexed: 06/06/2023]
Abstract
Historically abundant and widespread, populations of Atlantic eels have suffered a sharp decline in recent decades, in the ranges 40-80% and 90-99% for American and European eels, respectively. As a result, American eels are now classified as threatened, whereas European eels are considered to be in critical danger of extinction. Several causes have been identified as likely contributors of this decline, including overfishing, obstacles to migration (hydroelectric dams), climate change and habitat contamination. In the context of a larger project investigating the role of organic and inorganic contaminants in this decline, in this study, we measured the liver, kidney and muscle concentrations of essential (Cu, Se and Zn) and non-essential (Ag, As, Cd, Cr, Hg, Ni and Pb) metals in eels sampled at four sites in the South-West of France and four sites in Eastern Canada varying in contamination. Tissue concentrations of Cd, Hg and Se increased with fish size and age. Tissue metal concentrations generally reflected the contamination of their sampling sites. This was the case for Ag, As, Cd, Cu, Hg, Pb and Se. Comparison of tissue concentrations of these metals with the toxicological literature suggests that all of them except As could pose a risk to the health of eels from the most contaminated sites. In particular, European eels may be particularly at risk of Cd and Pb toxicity. Globally, our study suggests that a substantial accumulation of inorganic contaminants in the tissues of both eel species at sites contaminated by historical anthropogenic inputs may play a role in their decline.
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Affiliation(s)
- Pauline Pannetier
- INRS-ETE, Québec, QC, Canada; Univ. Bordeaux, UMR EPOC CNRS 5805, F-33400 Talence, France
| | | | | | - Fabien Pierron
- Univ. Bordeaux, UMR EPOC CNRS 5805, F-33400 Talence, France; CNRS, EPOC, UMR 5805, F-33400 Talence, France
| | - Magalie Baudrimont
- Univ. Bordeaux, UMR EPOC CNRS 5805, F-33400 Talence, France; CNRS, EPOC, UMR 5805, F-33400 Talence, France
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17
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Laporte M, Pavey SA, Rougeux C, Pierron F, Lauzent M, Budzinski H, Labadie P, Geneste E, Couture P, Baudrimont M, Bernatchez L. RAD sequencing reveals within-generation polygenic selection in response to anthropogenic organic and metal contamination in North Atlantic Eels. Mol Ecol 2015; 25:219-37. [DOI: 10.1111/mec.13466] [Citation(s) in RCA: 115] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2015] [Revised: 11/06/2015] [Accepted: 11/06/2015] [Indexed: 12/14/2022]
Affiliation(s)
- M. Laporte
- Département de Biologie; Institut de Biologie Intégrative et des Systèmes (IBIS); Université Laval; Pavillon Charles-Eugène-Marchand Québec QC G1V 0A6 Canada
| | - S. A. Pavey
- Département de Biologie; Institut de Biologie Intégrative et des Systèmes (IBIS); Université Laval; Pavillon Charles-Eugène-Marchand Québec QC G1V 0A6 Canada
- UMR EPOC CNRS 5805; Université de Bordeaux; allée Geoffroy Saint-Hilaire, CS 50023 33615 Pessac France
- CNRS, EPOC; UMR 5805; allée Geoffroy Saint-Hilaire, CS 50023 33615 Pessac France
- Institut National de la Recherche Scientifique (INRS); Centre Eau Terre et Environnement; 490, rue de la Couronne Québec QC G1K 9A9 Canada
- Department of Biology; University of New Brunswick; PO Box 5050 Saint-John NB E2L 4L5 Canada
| | - C. Rougeux
- Département de Biologie; Institut de Biologie Intégrative et des Systèmes (IBIS); Université Laval; Pavillon Charles-Eugène-Marchand Québec QC G1V 0A6 Canada
| | - F. Pierron
- UMR EPOC CNRS 5805; Université de Bordeaux; allée Geoffroy Saint-Hilaire, CS 50023 33615 Pessac France
- CNRS, EPOC; UMR 5805; allée Geoffroy Saint-Hilaire, CS 50023 33615 Pessac France
| | - M. Lauzent
- UMR EPOC CNRS 5805; Université de Bordeaux; allée Geoffroy Saint-Hilaire, CS 50023 33615 Pessac France
- CNRS, EPOC; UMR 5805; allée Geoffroy Saint-Hilaire, CS 50023 33615 Pessac France
| | - H. Budzinski
- UMR EPOC CNRS 5805; Université de Bordeaux; allée Geoffroy Saint-Hilaire, CS 50023 33615 Pessac France
- CNRS, EPOC; UMR 5805; allée Geoffroy Saint-Hilaire, CS 50023 33615 Pessac France
| | - P. Labadie
- UMR EPOC CNRS 5805; Université de Bordeaux; allée Geoffroy Saint-Hilaire, CS 50023 33615 Pessac France
- CNRS, EPOC; UMR 5805; allée Geoffroy Saint-Hilaire, CS 50023 33615 Pessac France
| | - E. Geneste
- UMR EPOC CNRS 5805; Université de Bordeaux; allée Geoffroy Saint-Hilaire, CS 50023 33615 Pessac France
- CNRS, EPOC; UMR 5805; allée Geoffroy Saint-Hilaire, CS 50023 33615 Pessac France
| | - P. Couture
- Institut National de la Recherche Scientifique (INRS); Centre Eau Terre et Environnement; 490, rue de la Couronne Québec QC G1K 9A9 Canada
| | - M. Baudrimont
- UMR EPOC CNRS 5805; Université de Bordeaux; allée Geoffroy Saint-Hilaire, CS 50023 33615 Pessac France
- CNRS, EPOC; UMR 5805; allée Geoffroy Saint-Hilaire, CS 50023 33615 Pessac France
| | - L. Bernatchez
- Département de Biologie; Institut de Biologie Intégrative et des Systèmes (IBIS); Université Laval; Pavillon Charles-Eugène-Marchand Québec QC G1V 0A6 Canada
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18
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Luo Y, Shan D, Zhong H, Zhou Y, Chen W, Cao J, Guo Z, Xiao J, He F, Huang Y, Li J, Huang H, Xu P. Subchronic effects of cadmium on the gonads, expressions of steroid hormones and sex-related genes in tilapia Oreochromis niloticus. ECOTOXICOLOGY (LONDON, ENGLAND) 2015; 24:2213-2223. [PMID: 26471182 DOI: 10.1007/s10646-015-1542-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 09/16/2015] [Indexed: 06/05/2023]
Abstract
Cadmium (Cd) is one of the most toxic heavy metals in aquatic ecosystem which affects fish health and aquaculture. In the present study, we examined the bioaccumulation of Cd in the gonads of tilapia via dissolved and dietary routes. We evaluated the subchronic effects of Cd on the histology of gonads, steroid hormone levels and sex-related gene expressions in tilapia. In addition, we also studied maternal transfer of Cd. Our results indicated that Cd was accumulated significantly in both ovary and testis from both exposure routes. Histopathological analysis showed that Cd induced ovary and testis injuries. Estradiol levels were significantly increased in dissolved Cd exposed female fish. In addition, the Cd exposure displayed different effects on gene expressions in gonads. In females, the estrogen receptor (ERα) was stimulated in dissolved Cd-exposed fish at 70.32 and 143.78 μg/L for 30 days and in fish at 143.78 μg/L for 60 days. Vitellogenin expression was significantly down-regulated in the ovary of dissolved Cd-exposed fish. In testis, GR expression was elevated after 60 days of dissolved Cd and dietary exposure. Furthermore, Cd level was significantly higher in the eggs than that in the fry. Our results demonstrated that both dissolved and dietary Cd exposures affected gonad development by altering steroid hormone levels and sex-related gene expressions in tilapia.
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Affiliation(s)
- Yongju Luo
- Wuxi Fisheries College, Nanjing Agricultural University, Wuxi, 214081, Jiangsu, China
- Guangxi Key Laboratory of Aquatic Genetic Breeding and Healthy Aquaculture, Guangxi Academy of Fishery Sciences, Nanning, 530021, Guangxi, China
- Faculty of Fisheries and Life Science, Shanghai Ocean University, Shanghai, 201306, China
| | - Dan Shan
- Faculty of Fisheries and Life Science, Shanghai Ocean University, Shanghai, 201306, China
| | - Huan Zhong
- Guangxi Key Laboratory of Aquatic Genetic Breeding and Healthy Aquaculture, Guangxi Academy of Fishery Sciences, Nanning, 530021, Guangxi, China
| | - Yi Zhou
- Guangxi Key Laboratory of Aquatic Genetic Breeding and Healthy Aquaculture, Guangxi Academy of Fishery Sciences, Nanning, 530021, Guangxi, China
| | - Wenzhi Chen
- Faculty of Fisheries and Life Science, Shanghai Ocean University, Shanghai, 201306, China
| | - Jinling Cao
- State Key Laboratory of Ecological Animal Husbandry and Environmental Veterinary Medicine, College of Animal Science and Veterinary Medicine, Shanxi Agricultural University, Taigu, 030801, Shanxi, China
| | - Zhongbao Guo
- Guangxi Key Laboratory of Aquatic Genetic Breeding and Healthy Aquaculture, Guangxi Academy of Fishery Sciences, Nanning, 530021, Guangxi, China
| | - Jun Xiao
- Guangxi Key Laboratory of Aquatic Genetic Breeding and Healthy Aquaculture, Guangxi Academy of Fishery Sciences, Nanning, 530021, Guangxi, China
| | - Fulin He
- Faculty of Fisheries and Life Science, Shanghai Ocean University, Shanghai, 201306, China
| | - Yifan Huang
- Guangxi Autonomous Region Center for Analysis and Test Research, Nanning, 530022, Guangxi, China
| | - Jian Li
- Guangxi Autonomous Region Center for Analysis and Test Research, Nanning, 530022, Guangxi, China
| | - Heming Huang
- Guangxi Autonomous Region Center for Analysis and Test Research, Nanning, 530022, Guangxi, China
| | - Pao Xu
- Wuxi Fisheries College, Nanjing Agricultural University, Wuxi, 214081, Jiangsu, China.
- Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Scientific Observing and Experimental Station of Fishery Resources and Environment in the Lower Reaches of the Yangtze River, Wuxi, 214081, Jiangsu, China.
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19
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Baillon L, Oses J, Pierron F, Bureau du Colombier S, Caron A, Normandeau E, Lambert P, Couture P, Labadie P, Budzinski H, Dufour S, Bernatchez L, Baudrimont M. Gonadal transcriptome analysis of wild contaminated female European eels during artificial gonad maturation. CHEMOSPHERE 2015; 139:303-309. [PMID: 26159298 DOI: 10.1016/j.chemosphere.2015.06.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2015] [Revised: 06/01/2015] [Accepted: 06/04/2015] [Indexed: 06/04/2023]
Abstract
Since the early 1980s, the population of European eels (Anguilla anguilla) has dramatically declined. Nowadays, the European eel is listed on the red list of threatened species (IUCN Red List) and is considered as critically endangered of extinction. Pollution is one of the putative causes for the collapse of this species. Among their possible effects, contaminants gradually accumulated in eels during their somatic growth phase (yellow eel stage) would be remobilized during their reproductive migration leading to potential toxic events in gonads. The aim of this study was to investigate the effects of organic and inorganic contaminants on the gonad development of wild female silver eels. Female silver eels from two sites with differing contamination levels were artificially matured. Transcriptomic analyses by means of a 1000 candidate gene cDNA microarray were performed on gonads after 11weeks of maturation to get insight into the mechanisms of toxicity of contaminants. The transcription levels of several genes, that were associated to the gonadosomatic index (GSI), were involved in mitotic cell division but also in gametogenesis. Genes associated to contaminants were mainly involved in the mechanisms of protection against oxidative stress, in DNA repair, in the purinergic signaling pathway and in steroidogenesis, suggesting an impairment of gonad development in eels from the polluted site. This was in agreement with the fact that eels from the reference site showed a higher gonad growth in comparison to contaminated fish.
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Affiliation(s)
- Lucie Baillon
- Univ. Bordeaux, UMR EPOC CNRS 5805, F-33400 Talence, France; CNRS, EPOC, UMR 5805, F-33400 Talence, France
| | - Jennifer Oses
- Univ. Bordeaux, UMR EPOC CNRS 5805, F-33400 Talence, France; CNRS, EPOC, UMR 5805, F-33400 Talence, France
| | - Fabien Pierron
- Univ. Bordeaux, UMR EPOC CNRS 5805, F-33400 Talence, France; CNRS, EPOC, UMR 5805, F-33400 Talence, France.
| | | | - Antoine Caron
- Institut National de la Recherche Scientifique, Centre Eau Terre Environnement, 490 de la Couronne, Québec, Québec G1K 9A9, Canada
| | - Eric Normandeau
- Muséum National d'Histoire Naturelle, UMR BOREA UPMC, CNRS 7208, IRD 207, UCBN, 7 rue Cuvier CP 32, F-75231 Paris, France
| | - Patrick Lambert
- Irtsea, UR EABX, 50 avenue de Verdun-Gazinet, 33612 Cestas, France
| | - Patrice Couture
- Institut National de la Recherche Scientifique, Centre Eau Terre Environnement, 490 de la Couronne, Québec, Québec G1K 9A9, Canada
| | - Pierre Labadie
- Univ. Bordeaux, UMR EPOC CNRS 5805, F-33400 Talence, France; CNRS, EPOC, UMR 5805, F-33400 Talence, France
| | - Hélène Budzinski
- Univ. Bordeaux, UMR EPOC CNRS 5805, F-33400 Talence, France; CNRS, EPOC, UMR 5805, F-33400 Talence, France
| | - Sylvie Dufour
- Muséum National d'Histoire Naturelle, UMR BOREA UPMC, CNRS 7208, IRD 207, UCBN, 7 rue Cuvier CP 32, F-75231 Paris, France
| | - Louis Bernatchez
- Département de biologie, Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Québec, Québec G1V 0A6, Canada
| | - Magalie Baudrimont
- Univ. Bordeaux, UMR EPOC CNRS 5805, F-33400 Talence, France; CNRS, EPOC, UMR 5805, F-33400 Talence, France
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20
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Claveau J, Monperrus M, Jarry M, Pinaly H, Baudrimont M, Gonzalez P, Amouroux D, Bardonnet A, Bolliet V. Spatial and seasonal variations of methylmercury in European glass eels (Anguilla anguilla) in the Adour estuary (France) and relation to their migratory behaviour. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2015; 22:10721-10732. [PMID: 25752638 DOI: 10.1007/s11356-015-4303-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2014] [Accepted: 03/02/2015] [Indexed: 06/04/2023]
Abstract
Overall recruitment of European glass eels (Anguilla anguilla) has decreased significantly since the early 1980s. Due to their long life cycle, benthic/demersal habits and high lipid content, eels might accumulate high concentrations of contaminants, but data concerning glass eels are still scarce. This study provides original data on methylmercury (MeHg) concentrations in glass eels at spatial (marine and estuarine), annual and seasonal scales. The relationship between MeHg concentrations in glass eels and their propensity to migrate up estuaries was also investigated. MeHg data were individually related to the eels' energetic condition which was estimated by dry weight. Glass eel migratory behaviour was investigated in an experimental flume and related to the MeHg concentration and dry weight at the individual scale. Marine and estuarine glass eels were caught from 2004 to 2011. There was a strong inverse correlation between MeHg concentrations and dry weight. MeHg concentrations increased in marine and estuarine glass eels from 2004 to 2009 and from 2004 to 2010, respectively, and then, both groups decreased in 2011. On a seasonal time scale, MeHg concentrations were higher at the end of the fishing season (April). MeHg bioaccumulation is likely to result from different sources, but the lack of significant differences between marine and estuarine glass eels suggests that direct contamination during estuarine migration is low. Other sources such as maternal transfer or oceanic contamination are discussed.
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Affiliation(s)
- Julie Claveau
- INRA, UMR 1224 Ecobiop, Aquapôle, 64310, Saint Pée sur Nivelle, France,
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21
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Rosabal M, Pierron F, Couture P, Baudrimont M, Hare L, Campbell PGC. Subcellular partitioning of non-essential trace metals (Ag, As, Cd, Ni, Pb, and Tl) in livers of American (Anguilla rostrata) and European (Anguilla anguilla) yellow eels. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2015; 160:128-141. [PMID: 25635611 DOI: 10.1016/j.aquatox.2015.01.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2014] [Revised: 01/12/2015] [Accepted: 01/14/2015] [Indexed: 06/04/2023]
Abstract
We determined the intracellular compartmentalization of the trace metals Ag, As, Cd, Ni, Pb, and Tl in the livers of yellow eels collected from the Saint Lawrence River system in Canada (Anguilla rostrata) and in the area of the Gironde estuary in France (Anguilla anguilla). Differential centrifugation, NaOH digestion and thermal shock were used to separate eel livers into putative "sensitive" fractions (heat-denatured proteins, mitochondria and microsomes+lysosomes) and detoxified metal fractions (heat-stable peptides/proteins and granules). The cytosolic heat-stable fraction (HSP) was consistently involved in the detoxification of all trace metals. In addition, granule-like structures played a complementary role in the detoxification of Ni, Pb, and Tl in both eel species. However, these detoxification mechanisms were not completely effective because increasing trace metal concentrations in whole livers were accompanied by significant increases in the concentrations of most trace metals in "sensitive" subcellular fractions, that is, mitochondria, heat-denatured cytosolic proteins and microsomes+lysosomes. Among these "sensitive" fractions, mitochondria were the major binding sites for As, Cd, Pb, and Tl. This accumulation of non-essential metals in "sensitive" fractions likely represents a health risk for eels inhabiting the Saint Lawrence and Gironde environments.
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Affiliation(s)
- Maikel Rosabal
- Institut national de la recherche scientifique, Centre Eau Terre et Environnement (INRS-ETE), 490 de la Couronne, Québec (Québec) G1K 9A9, Canada
| | - Fabien Pierron
- Université de Bordeaux, UMR EPOC CNRS 5805, F-33400 Talence, France; CNRS, EPOC, UMR 5805, F-33400 Talence, France
| | - Patrice Couture
- Institut national de la recherche scientifique, Centre Eau Terre et Environnement (INRS-ETE), 490 de la Couronne, Québec (Québec) G1K 9A9, Canada
| | - Magalie Baudrimont
- Université de Bordeaux, UMR EPOC CNRS 5805, F-33400 Talence, France; CNRS, EPOC, UMR 5805, F-33400 Talence, France
| | - Landis Hare
- Institut national de la recherche scientifique, Centre Eau Terre et Environnement (INRS-ETE), 490 de la Couronne, Québec (Québec) G1K 9A9, Canada
| | - Peter G C Campbell
- Institut national de la recherche scientifique, Centre Eau Terre et Environnement (INRS-ETE), 490 de la Couronne, Québec (Québec) G1K 9A9, Canada.
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Pierron F, Bureau du Colombier S, Moffett A, Caron A, Peluhet L, Daffe G, Lambert P, Elie P, Labadie P, Budzinski H, Dufour S, Couture P, Baudrimont M. Abnormal ovarian DNA methylation programming during gonad maturation in wild contaminated fish. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2014; 48:11688-11695. [PMID: 25203663 DOI: 10.1021/es503712c] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
There is increasing evidence that pollutants may cause diseases via epigenetic modifications. Epigenetic mechanisms such as DNA methylation participate in the regulation of gene transcription. Surprisingly, epigenetics research is still limited in ecotoxicology. In this study, we investigated whether chronic exposure to contaminants experienced by wild female fish (Anguilla anguilla) throughout their juvenile phase can affect the DNA methylation status of their oocytes during gonad maturation. Thus, fish were sampled in two locations presenting a low or a high contamination level. Then, fish were transferred to the laboratory and artificially matured. Before hormonal treatment, the DNA methylation levels of the genes encoding for the aromatase and the receptor of the follicle stimulating hormone were higher in contaminated fish than in fish from the clean site. For the hormone receptor, this hypermethylation was positively correlated with the contamination level of fish and was associated with a decrease in its transcription level. In addition, whereas gonad growth was associated with an increase in DNA methylation in fish from the clean site, no changes were observed in contaminated fish in response to hormonal treatment. Finally, a higher gonad growth was observed in fish from the reference site in comparison to contaminated fish.
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Affiliation(s)
- Fabien Pierron
- University of Bordeaux, EPOC, UMR 5805 , F-33400 Talence, France
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23
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Massar B, Dey S, Dutta K. Micro structure analysis of the ovaries of common carp, Cyprinus carpio L. inhabiting a polluted reservoir, Umiam in Meghalaya, India. MICROSCOPY AND MICROANALYSIS : THE OFFICIAL JOURNAL OF MICROSCOPY SOCIETY OF AMERICA, MICROBEAM ANALYSIS SOCIETY, MICROSCOPICAL SOCIETY OF CANADA 2014; 20:1404-1410. [PMID: 25089745 DOI: 10.1017/s143192761401294x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The study uses microscopy to analyze damage caused to the ovaries of a fresh water fish, Cyprinus carpio L., owing to its exposure to municipal wastes in a polluted reservoir, Umiam in Meghalaya, India. Histological analysis of the ovary showed atretic oocytes, detached ovarian wall, detached follicular linings, and necrosis of nuclei. Scanning electron microscopy revealed deformed oocytes with a rough and distorted surface. Transmission electron microscopy showed a poorly developed chorion, presence of relatively less electron-dense materials as compared with control, multinucleation in some cells surrounding the oocytes, and distorted and condensed mitochondria. The importance of microscopy in its different forms in analyzing histological, surface microstructural and fine structural damage to fish ovaries in response to environmental pollution owing to municipal wastes and city garbage is discussed with the help of available literature.
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Affiliation(s)
- Bashida Massar
- 1Department of Zoology,St. Anthony's College,Shillong-1,Meghalaya-793001,India
| | - Sudip Dey
- 2Sophisticated Analytical Instrument Facility,NEHU,Shillong-793022,Meghalaya,India
| | - Karabi Dutta
- 3Department of Zoology,Gauhati University,Guwahati-781014,Assam,India
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Pierron F, Baillon L, Sow M, Gotreau S, Gonzalez P. Effect of low-dose cadmium exposure on DNA methylation in the endangered European eel. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2013; 48:797-803. [PMID: 24328039 DOI: 10.1021/es4048347] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
There is increasing evidence that epigenetics can play a key role in the etiology of diseases engendered by chronic pollutant exposure. Although epigenetics has received significant attention in the field of biomedicine during the last years, epigenetics research is surprisingly very limited in ecotoxicology. The aim of the present study was to investigate the possible effects of low-dose cadmium exposure on the DNA methylation profile in a critically endangered fish species, the European eel. Eels were exposed to environmentally realistic concentrations of cadmium (0.4 and 4 μg·L(-1)) during 45 days. The global CpG methylation status of eel liver was determined by means of a homemade ELISA assay. We then used a methylation-sensitive arbitrarily primed PCR method to identify genes that are differentially methylated between control and Cd-exposed eels. Our results show that cadmium exposure is associated with DNA hypermethylation and with a decrease in total RNA synthesis. Among hypermethylated sequences identified, several fragments presented high homologies with genes encoding for proteins involved in intracellular trafficking, lipid biosynthesis, and phosphatidic acid signaling pathway. In addition, few fragments presented high homologies with retrotransposon-like sequences. Our study illustrates how DNA methylation can be involved in the chronic stress response to Cd in fish.
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Affiliation(s)
- Fabien Pierron
- Université de Bordeaux , EPOC, UMR 5805, F-33400 Talence, France
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25
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Blanchet-Letrouvé I, Lafont AG, Poirier L, Baloche S, Zalouk-Vergnoux A, Dufour S, Mouneyrac C. Vg mRNA induction in an endangered fish species (Anguilla anguilla) from the Loire estuary (France). ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2013; 97:103-113. [PMID: 23993220 DOI: 10.1016/j.ecoenv.2013.07.019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2012] [Revised: 06/25/2013] [Accepted: 07/13/2013] [Indexed: 06/02/2023]
Abstract
Estuarine zones are extremely fragile due to increasing stress from anthropogenic activities. Among those, the Loire estuary (France) is potentially exposed to various contaminants including Endocrine Disruptors Compounds (EDCs) able to impact the reproduction physiology of fish. The European eel (Anguilla anguilla), endangered fish species, is apparently not relevant, in its yellow stage, to monitor the effects of endocrine disruption. Despite this weakly responsiveness, this study aimed to investigate whether European eel from the Loire estuary may still be the subject of estrogenic disruption quantifying the hepatic Vg gene expression according to gender and sexual stage. Vitellogenin (Vg) appears as a valuable biomarker of EDCs, as well as for exposure and effects. Quantitative real-time Reverse Transcription Polymerase Chain Reaction (q RT PCR) was used in this study to amplify responses of hepatic Vg transcripts. European eels were sampled in May 2009 (N=57) and November 2010 (during the downstream migration, N=10) in two sites of the Loire estuary with different ecological conditions and contamination pressures (upstream: Varades; downstream: Nantes). Reproductive (gender, sexual maturity stage) and biometric parameters of collected eels were determined. A laboratory exposure of silver male to steroid hormones (Testosterone (T), 11-KetoTestosterone (11-KT), Estradiol (E2)) was conducted in parallel to validate the q RT PCR approach on hepatic Vg mRNA. Results demonstrated the responsiveness of exposed silver male eels, since hepatic mRNA Vg induction was observed in E2 treated males compared to control specimens. In the field, results of female silver eels reflected large inter-individual differences in the activation of hepatic Vg at silvering. However, while only female silver eels should express hepatic Vg mRNA, quantifiable levels were also detected in a proportion of 38% of the other individuals sampled, normally not inclined to express it, those being undifferentiated eels, yellow females, yellow and silver males. According to each sexual stage, no difference of expression was observed between eels from the two sampling sites. Histological results as well as low Vg mRNA levels detected do not permit a conclusion as to a potential effect of endocrine disruption.
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Pujolar JM, Milan M, Marino IAM, Capoccioni F, Ciccotti E, Belpaire C, Covaci A, Malarvannan G, Patarnello T, Bargelloni L, Zane L, Maes GE. Detecting genome-wide gene transcription profiles associated with high pollution burden in the critically endangered European eel. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2013; 132-133:157-164. [PMID: 23518471 DOI: 10.1016/j.aquatox.2013.02.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2012] [Revised: 01/28/2013] [Accepted: 02/15/2013] [Indexed: 06/01/2023]
Abstract
The European eel illustrates an example of a critically endangered fish species strongly affected by human stressors throughout its life cycle, in which pollution is considered to be one of the factors responsible for the decline of the stock. The objective of our study was to better understand the transcriptional response of European eels chronically exposed to pollutants in their natural environment. A total of 42 pre-migrating (silver) female eels from lowly, highly and extremely polluted environments in Belgium and, for comparative purposes, a lowly polluted habitat in Italy were measured for polychlorinated biphenyls (PCBs), organochlorine pesticides (OCPs) and brominated flame retardants (BFRs). Multipollutant level of bioaccumulation was linked to their genome-wide gene transcription using an eel-specific array of 14,913 annotated cDNAs. Shared responses to pollutant exposure were observed when comparing the highly polluted site in Belgium with the relatively clean sites in Belgium and Italy. First, an altered pattern of transcription of genes was associated with detoxification, with a novel European eel CYP3A gene and gluthatione S-transferase transcriptionally up-regulated. Second, an altered pattern of transcription of genes associated with the oxidative phosphorylation pathway, with the following genes involved in the generation of ATP being transcriptionally down-regulated in individuals from the highly polluted site: NADH dehydrogenase, succinate dehydrogenase, ubiquinol-cytochrome c reductase, cytochrome c oxidase and ATP synthase. Although we did not measure metabolism directly, seeing that the transcription level of many genes encoding enzymes involved in the mitochondrial respiratory chain and oxidative phosphorylation were down-regulated in the highly polluted site suggests that pollutants may have a significant effect on energy metabolism in these fish.
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Affiliation(s)
- J M Pujolar
- Department of Biology, University of Padova, I-35131 Padova, Italy
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27
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Maes GE, Raeymaekers JAM, Hellemans B, Geeraerts C, Parmentier K, De Temmerman L, Volckaert FAM, Belpaire C. Gene transcription reflects poor health status of resident European eel chronically exposed to environmental pollutants. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2013; 126:242-255. [PMID: 23247545 DOI: 10.1016/j.aquatox.2012.11.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2012] [Revised: 10/30/2012] [Accepted: 11/07/2012] [Indexed: 06/01/2023]
Abstract
Understanding the effects of chronic exposure to pollutants on the genome and transcriptome of diadromous fish populations is crucial for their resilience under combined anthropogenic and environmental selective pressures. The catadromous European eel (Anguilla anguilla L.) has suffered a dramatic decline in recruitment for three decades, necessitating a thorough assessment of the transcriptional effects of environmental pollutants on resident and migrating eels in natural systems. We investigated the relationship between muscular bioaccumulation levels of metals (Hg, Cd, Pb, Cu, Zn, Ni, Cr, As and Se), PCBs and organochlorine pesticides (DDTs), the health status (condition factor and lipid reserves) and the associated transcriptional response in liver and gill tissues for genes involved in metal detoxification (metallothionein, MT) and oxidative metabolism (cytochrome P4501A, CYP1A) of xenobiotic compounds. In total 84 resident eels originating from three Belgian river basins (Scheldt, Meuse and Yzer) were analyzed along with five unpolluted aquaculture samples as control group. There was a large spatial variation in individual contaminant intensity and profile, while tissue pollution levels were strongly and negatively associated with condition indices, suggesting an important impact of pollution on the health of sub-adult resident eels. Gene transcription patterns revealed a complex response mechanism to a cocktail of pollutants, with a high variation at low pollution levels, but strongly down-regulated hepatic and gill gene transcription in highly polluted eels. Resident eels clearly experience a high pollution burden and seem to show a dysfunctional gene transcription regulation of detoxification genes at higher pollutant levels, correlated with low energy reserves and condition. To fully understand the evolutionary implications of pollutants on eel reproductive fitness, analyses of mature migrating eels and the characterization of their transcriptome-wide gene transcription response would be appropriate to unveil the complex responses associated with multiple interacting stressors and the long-term consequences at the entire species level. In the meanwhile, jointly monitoring environmental and tissue pollution levels at a European scale should be initiated, while preserving high quality habitats to increase the recovery chance of European eel in the future.
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Affiliation(s)
- G E Maes
- University of Leuven, Laboratory of Biodiversity and Evolutionary Genomics, Belgium.
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Pujolar JM, Marino IAM, Milan M, Coppe A, Maes GE, Capoccioni F, Ciccotti E, Bervoets L, Covaci A, Belpaire C, Cramb G, Patarnello T, Bargelloni L, Bortoluzzi S, Zane L. Surviving in a toxic world: transcriptomics and gene expression profiling in response to environmental pollution in the critically endangered European eel. BMC Genomics 2012; 13:507. [PMID: 23009661 PMCID: PMC3532374 DOI: 10.1186/1471-2164-13-507] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2012] [Accepted: 09/23/2012] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Genomic and transcriptomic approaches have the potential for unveiling the genome-wide response to environmental perturbations. The abundance of the catadromous European eel (Anguilla anguilla) stock has been declining since the 1980s probably due to a combination of anthropogenic and climatic factors. In this paper, we explore the transcriptomic dynamics between individuals from high (river Tiber, Italy) and low pollution (lake Bolsena, Italy) environments, which were measured for 36 PCBs, several organochlorine pesticides and brominated flame retardants and nine metals. RESULTS To this end, we first (i) updated the European eel transcriptome using deep sequencing data with a total of 640,040 reads assembled into 44,896 contigs (Eeelbase release 2.0), and (ii) developed a transcriptomic platform for global gene expression profiling in the critically endangered European eel of about 15,000 annotated contigs, which was applied to detect differentially expressed genes between polluted sites. Several detoxification genes related to metabolism of pollutants were upregulated in the highly polluted site, including genes that take part in phase I of the xenobiotic metabolism (CYP3A), phase II (glutathione-S-transferase) and oxidative stress (glutathione peroxidase). In addition, key genes in the mitochondrial respiratory chain and oxidative phosphorylation were down-regulated at the Tiber site relative to the Bolsena site. CONCLUSIONS Together with the induced high expression of detoxification genes, the suggested lowered expression of genes supposedly involved in metabolism suggests that pollution may also be associated with decreased respiratory and energy production.
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Fazio G, Sasal P, Mouahid G, Lecomte-Finiger R, Moné H. Swim bladder nematodes (Anguillicoloides crassus) disturb silvering in European eels (Anguilla anguilla). J Parasitol 2012; 98:695-705. [PMID: 22404329 DOI: 10.1645/ge-2700.1] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
The introduced parasite Anguillicoloides crassus is thought to play an important role in the decline of freshwater eel (Anguilla spp.) populations. These nematodes are known to negatively affect many fitness-related traits in eels. We used experimental infections to study the effect of A. crassus on the relative size or mass of organs, and the expression of functionally relevant genes (total of 12 parameters) that are involved in the silvering process of Anguilla anguilla. Our results showed that the liver mass, the hemoglobin α-chain, and androgen receptors α expression levels were significantly higher in infected eels, whereas the freshwater rod opsin expression level and the gut mass were significantly lower in infected eels. Our results suggested that infected eels were at a more advanced stage in the silvering process than uninfected counterparts of similar size. These results may be explained by 2 hypotheses. First, A. crassus could trigger physiological mechanisms involved in the silvering process as a side-effect of infection. Second, eels may adjust their life history traits in response to infection. The implications for eel migration and reproductive success may be either negative or positive, depending on whether the response to A. crassus infection results in an additional cost of the parasite or is due to the phenotypic plasticity of the host.
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Affiliation(s)
- Géraldine Fazio
- CNRS-EPHE, USR 3278, CRIOBE, BP 1013, Papetoai, Moorea, Polynésie Française
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Le DQ, Nguyen DC, Harino H, Kakutani N, Chino N, Arai T. Distribution of trace metals and methylmercury in soft tissues of the freshwater eel Anguilla marmorata in Vietnam. ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2010; 59:282-290. [PMID: 20162263 DOI: 10.1007/s00244-010-9479-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2009] [Accepted: 01/25/2010] [Indexed: 05/28/2023]
Abstract
This study investigated trace metals in water, sediment, and various organs of the mature eel Anguilla marmorata in the Ba River, Vietnam. The metal concentrations in water and sediment did not exceed the Vietnam water criteria and sediment background concentration, except for Mn and Pb in sediment. The results of metal analysis in eel specimens indicated that the liver and kidney were the dominant organs for almost all trace metals, whereas muscle tended to accumulate high levels of Hg and approximately 87.4-100% of Hg was methylmercury. A strong positive correlation between mercury levels in muscle and age were found, but there was no correlation between mercury and body size. Interestingly, a high concentration of Zn was found in the gonad and liver; this indicated that high levels of Zn in the liver might play a physiologically important role in the eel's biological mechanisms during gonadal maturation. Though almost none of the metal concentrations in the muscle exceeded the reference doses of the U.S. EPA, approximately 80% of eels from the river contained mercury exceeding the recommended levels (0.30 microg/g) of the U.S. EPA and might present a risk for human consumption.
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Affiliation(s)
- Dung Quang Le
- International Coastal Research Center, Ocean Research Institute, The University of Tokyo, Akahama 2-106-1, Otsuchi, Iwate 028-1102, Japan.
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31
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Adiele RC, Stevens D, Kamunde C. Reciprocal enhancement of uptake and toxicity of cadmium and calcium in rainbow trout (Oncorhynchus mykiss) liver mitochondria. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2010; 96:319-327. [PMID: 20036780 DOI: 10.1016/j.aquatox.2009.11.019] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2009] [Revised: 11/10/2009] [Accepted: 11/25/2009] [Indexed: 05/28/2023]
Abstract
The interactive effects of cadmium (Cd) and calcium (Ca) on energy metabolism in rainbow trout liver mitochondria were studied to test the prediction that Ca would protect against Cd-induced mitochondrial liability. Isolated rainbow trout liver mitochondria were energized with malate and glutamate and exposed to increasing concentrations (5-100 microM) of Cd and Ca singly and in combination at 15 degrees C. Accumulation of Cd and Ca in the mitochondria and mitochondrial respiration (oxygen consumption) rates were measured. Additionally, un-energized mitochondria were incubated with low doses (1 microM) of Cd and Ca singly and in combination, with time-course measurements of cation accumulation/binding and oxygen consumption rates. In energized actively phosphorylating mitochondria, the uptake rates of both Cd and Ca were dose-dependent and enhanced when administered concurrently. Upon low-dose incubation, Cd accumulation was rapid and peaked in 5 min, while no appreciable uptake of Ca occurred. Functionally, the resting (state 4, ADP-limited) respiration rate was not affected in the dose-response exposure, but it decreased remarkably on low-dose incubation. Adenosine diphosphate (ADP)-stimulated respiration (state 3) rate was impaired dose-dependently with maximal inhibitions (at the highest dose, 100 microM) of 32, 64 and 73% for Ca, Cd, and combined exposures, respectively. The combined effects of Ca and Cd suggested synergistic (more than additive) action and partial additivity of effects at low and higher doses of the two cations, respectively. Moreover, on a molar basis, Cd was twice as toxic as Ca to rainbow trout liver mitochondria and when combined, approximately 90% of the effects were attributable to Cd. The coupling efficiency, as measured by respiratory control ratio (RCR) and phosphorylation efficiency, measured as ADP/O ratio, both decreased as the exposure dosage and duration increased. In addition, Cd and Ca exposure decreased mitochondrial proton leak (state 4+ respiration) rates on prolonged exposure possibly by inhibiting processes that generate mitochondrial membrane potential, the force that drives proton leak. Overall these data suggest that the widely accepted theme that Ca and Cd are competitive antagonists does not hold for mitochondrial effects and that Cd and Ca cooperate to impair oxidative phosphorylation in rainbow trout liver mitochondria.
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Affiliation(s)
- Reginald C Adiele
- Department of Biomedical Sciences, Atlantic Veterinary College, University of Prince Edward Island, 550 University Avenue, Charlottetown, PE C1A4P3, Canada
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Geeraerts C, Belpaire C. The effects of contaminants in European eel: a review. ECOTOXICOLOGY (LONDON, ENGLAND) 2010; 19:239-266. [PMID: 19806452 DOI: 10.1007/s10646-009-0424-0] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 09/18/2009] [Indexed: 05/28/2023]
Abstract
European eel (Anguilla anguilla (L.)) stocks are in decline in most of their geographical distribution and their status is considered below safe biological limits. Recently, there is an increasing awareness that spawner quality might be an essential element in the decline of the species since pollution by bioaccumulating chemical substances may have a large impact on the reproduction success of the eel. This review gives an overview of the literature on the effects of contaminants on the European eel and on the consequences on the biology and fitness of the eel in order to document the role of pollution in its decline. A variety of contaminants have been found to affect the eel. These contaminants may cause disturbance of the immune system, the reproduction system, the nervous system and the endocrine system and effects were reported on several levels of biological organization, from subcellular, organ, individual up to even population level. More extensive research is needed in order to evaluate how pollutants are detrimental to eel populations. Getting a comprehensive overview of the quality (including contamination levels, biomarker responses, lipid content and condition) of the silver eel population all over Europe seems to be an essential and urgent objective for the European eel management.
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Affiliation(s)
- Caroline Geeraerts
- Research Institute for Nature and Forest, Duboislaan 14, 1560, Groenendaal-Hoeilaart, Belgium.
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Love MS, Goldberg SR. A Histological Examination of the Ovaries of Pacific Sanddab, Citharichthys sordidus, Captured at Two Oil Platforms and Two Natural Sites in the Southern California Bight. ACTA ACUST UNITED AC 2009. [DOI: 10.3160/0038-3872-108.2.45] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Pierron F, Baudrimont M, Dufour S, Elie P, Bossy A, Lucia M, Massabuau JC. Ovarian gene transcription and effect of cadmium pre-exposure during artificial sexual maturation of the European eel (Anguilla anguilla). Biometals 2009; 22:985-94. [DOI: 10.1007/s10534-009-9250-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2009] [Accepted: 05/19/2009] [Indexed: 02/01/2023]
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Schmitt CJ, Brumbaugh WG, May TW. Concentrations of cadmium, cobalt, lead, nickel, and zinc in blood and fillets of northern hog sucker (Hypentelium nigricans) from streams contaminated by lead-zinc mining: implications for monitoring. ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2009; 56:509-524. [PMID: 19205790 DOI: 10.1007/s00244-009-9288-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2008] [Accepted: 01/20/2009] [Indexed: 05/27/2023]
Abstract
Lead (Pb) and other metals can accumulate in northern hog sucker (Hypentelium nigricans) and other suckers (Catostomidae), which are harvested in large numbers from Ozark streams by recreational fishers. Suckers are also important in the diets of piscivorous wildlife and fishes. Suckers from streams contaminated by historic Pb-zinc (Zn) mining in southeastern Missouri are presently identified in a consumption advisory because of Pb concentrations. We evaluated blood sampling as a potentially nonlethal alternative to fillet sampling for Pb and other metals in northern hog sucker. Scaled, skin-on, bone-in "fillet" and blood samples were obtained from northern hog suckers (n = 75) collected at nine sites representing a wide range of conditions relative to Pb-Zn mining in southeastern Missouri. All samples were analyzed for cadmium (Cd), cobalt (Co), Pb, nickel (Ni), and Zn. Fillets were also analyzed for calcium as an indicator of the amount of bone, skin, and mucus included in the samples. Pb, Cd, Co, and Ni concentrations were typically higher in blood than in fillets, but Zn concentrations were similar in both sample types. Concentrations of all metals except Zn were typically higher at sites located downstream from active and historic Pb-Zn mines and related facilities than at nonmining sites. Blood concentrations of Pb, Cd, and Co were highly correlated with corresponding fillet concentrations; log-log linear regressions between concentrations in the two sample types explained 94% of the variation for Pb, 73-83% of the variation for Co, and 61% of the variation for Cd. In contrast, relations for Ni and Zn explained <12% of the total variation. Fillet Pb and calcium concentrations were correlated (r = 0.83), but only in the 12 fish from the most contaminated site; concentrations were not significantly correlated across all sites. Conversely, fillet Cd and calcium were correlated across the range of sites (r = 0.78), and the inclusion of calcium in the fillet-to-blood relation explained an additional 12% of the total variation in fillet Cd. Collectively, the results indicate that blood sampling could provide reasonably accurate and precise estimates of fillet Pb, Co, and Cd concentrations that would be suitable for identifying contaminated sites and for monitoring, but some fillet sampling might be necessary at contaminated sites for establishing consumption advisories.
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Affiliation(s)
- C J Schmitt
- Columbia Environmental Research Center, US Geological Survey, Columbia, MO 65201, USA.
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