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Teixeira de Mello F, Sierra P, Moi DA, Alonso J, Lucas C, Suárez B, Alvareda E, Alvarez J, Andrade MS, Arimon L, Urtado L, Piperno A. Effects of urbanization and accessibility to sanitation services on water quality in urban streams in Uruguay. ENVIRONMENTAL MONITORING AND ASSESSMENT 2024; 196:185. [PMID: 38253943 DOI: 10.1007/s10661-024-12365-z] [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: 10/08/2023] [Accepted: 01/15/2024] [Indexed: 01/24/2024]
Abstract
The world's urban population is growing rapidly, and threatening natural ecosystems, especially streams. Urbanization leads to stream alterations, increased peak flow frequencies, and reduced water quality due to pollutants, morphological changes, and biodiversity loss, known as the urban stream syndrome. However, a shift towards recognizing urban streams as valuable natural systems is occurring, emphasizing green infrastructure and nature-based solutions. This study in Uruguay examined water quality in various watersheds with different urbanization levels and socio-environmental characteristics along a precipitation gradient. Using Geographic Information Systems (GIS) and in situ data, we assessed physicochemical parameters, generated territorial variables, and identified key predictors of water quality. We found that urbanization, particularly urban areas, paved areas, and populations without sanitation, significantly influenced water quality parameters. These factors explained over 50% of the variation in water quality indicators. However, the relationship between urbanization and water quality was non-linear, with abrupt declines after specific urban intensity thresholds. Our results illustrate that ensuring sanitation networks and managing green areas effectively are essential for preserving urban stream water quality. This research underscores the importance of interdisciplinary teams and localized data for informed freshwater resource management.
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Affiliation(s)
- Franco Teixeira de Mello
- Departamento de Ecología y Gestión Ambiental, Universidad de la República, CURE Tacuarembó, 20100, Maldonado, Uruguay.
| | - Pablo Sierra
- Instituto de Estudios Urbanos y Territoriales, Facultad de Arquitectura Diseño y Urbanismo, Universidad de la República, Br. Artigas, 1031, Montevideo, Uruguay
| | - Dieison A Moi
- Laboratory of Multitrophic Interactions and Biodiversity, Department of Animal Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, SP, 13083-862, Brazil
| | - Jimena Alonso
- Instituto de Mecánica de Fluidos e Ingeniería Ambiental, Facultad de Ingeniería, Universidad de La República, J. Herrera y Reissig 565, C.P, 11200, Montevideo, Uruguay
| | - Christine Lucas
- Laboratorio de Ecología Fluvial, Departamento de Ciencias Biológicas, CENUR Litoral Norte, Paysandú, Uruguay
| | - Bárbara Suárez
- Departamento de Ecología y Gestión Ambiental, Universidad de la República, CURE Tacuarembó, 20100, Maldonado, Uruguay
| | - Elena Alvareda
- Departamento del Agua, CENUR Litoral Norte, Universidad de la República, Salto, Uruguay
| | - Jimena Alvarez
- Instituto de Estudios Urbanos y Territoriales, Facultad de Arquitectura Diseño y Urbanismo, Universidad de la República, Br. Artigas, 1031, Montevideo, Uruguay
| | - María Soledad Andrade
- Laboratorio Química Ambiental, Área de Gestión Ambiental, Comisión Técnica Mixta de Salto Grande, Salto, Uruguay
| | - Lucia Arimon
- Instituto de Estudios Urbanos y Territoriales, Facultad de Arquitectura Diseño y Urbanismo, Universidad de la República, Br. Artigas, 1031, Montevideo, Uruguay
| | - Lucía Urtado
- Departamento de Ecología y Gestión Ambiental, Universidad de la República, CURE Tacuarembó, 20100, Maldonado, Uruguay
| | - Adriana Piperno
- Instituto de Estudios Urbanos y Territoriales, Facultad de Arquitectura Diseño y Urbanismo, Universidad de la República, Br. Artigas, 1031, Montevideo, Uruguay.
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Rojas-Hucks S, Rodriguez-Jorquera IA, Nimpstch J, Bahamonde P, Benavides JA, Chiang G, Pulgar J, Galbán-Malagón CJ. South American National Contributions to Knowledge of the Effects of Endocrine Disrupting Chemicals in Wild Animals: Current and Future Directions. TOXICS 2022; 10:toxics10120735. [PMID: 36548568 PMCID: PMC9781241 DOI: 10.3390/toxics10120735] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 10/28/2022] [Accepted: 11/02/2022] [Indexed: 05/28/2023]
Abstract
Human pressure due to industrial and agricultural development has resulted in a biodiversity crisis. Environmental pollution is one of its drivers, including contamination of wildlife by chemicals emitted into the air, soil, and water. Chemicals released into the environment, even at low concentrations, may pose a negative effect on organisms. These chemicals might modify the synthesis, metabolism, and mode of action of hormones. This can lead to failures in reproduction, growth, and development of organisms potentially impacting their fitness. In this review, we focused on assessing the current knowledge on concentrations and possible effects of endocrine disruptor chemicals (metals, persistent organic pollutants, and others) in studies performed in South America, with findings at reproductive and thyroid levels. Our literature search revealed that most studies have focused on measuring the concentrations of compounds that act as endocrine disruptors in animals at the systemic level. However, few studies have evaluated the effects at a reproductive level, while information at thyroid disorders is scarce. Most studies have been conducted in fish by researchers from Brazil, Argentina, Chile, and Colombia. Comparison of results across studies is difficult due to the lack of standardization of units in the reported data. Future studies should prioritize research on emergent contaminants, evaluate effects on native species and the use of current available methods such as the OMICs. Additionally, there is a primary focus on organisms related to aquatic environments, and those inhabiting terrestrial environments are scarce or nonexistent. Finally, we highlight a lack of funding at a national level in the reviewed topic that may influence the observed low scientific productivity in several countries, which is often negatively associated with their percentage of protected areas.
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Affiliation(s)
- Sylvia Rojas-Hucks
- Departamento de Ecología y Biodiversidad, Facultad Ciencias de la Vida, Universidad Andres Bello, República 440, Santiago 8370134, Chile
| | | | - Jorge Nimpstch
- Facultad de Ciencias, Instituto de Ciencias Marinas y Limnológicas, Universidad Austral de Chile, Valdivia 5090000, Chile
| | - Paulina Bahamonde
- Laboratory of Aquatic Environmental Research, Centro de Estudios Avanzados—HUB Ambiental UPLA, Universidad de Playa Ancha, Valparaíso 2360004, Chile
- Millennium Nucleus of Austral Invasive Salmonids (INVASAL), Concepción 4070386, Chile
- Cape Horn International Center (CHIC), Universidad de Magallanes, Punta Arenas 6210427, Chile
| | - Julio A. Benavides
- Doctorado en Medicina de la Conservación, Facultad Ciencias de la Vida, Universidad Andres Bello, República 440, Santiago 8370134, Chile
- Centro de Investigación para la Sustentabilidad, Facultad Ciencias de la Vida, Universidad Andres Bello, República 440, Santiago 8370134, Chile
- MIVEGEC, IRD, CNRS, Université de Montpellier, 34090 Montpellier, France
| | - Gustavo Chiang
- Departamento de Ecología y Biodiversidad, Facultad Ciencias de la Vida, Universidad Andres Bello, República 440, Santiago 8370134, Chile
- Centro de Investigación para la Sustentabilidad, Facultad Ciencias de la Vida, Universidad Andres Bello, República 440, Santiago 8370134, Chile
| | - José Pulgar
- Departamento de Ecología y Biodiversidad, Facultad Ciencias de la Vida, Universidad Andres Bello, República 440, Santiago 8370134, Chile
| | - Cristóbal J. Galbán-Malagón
- GEMA, Center for Genomics, Ecology & Environment, Universidad Mayor, Camino la Pirámide 5750, Huechuraba, Santiago 8580000, Chile
- Institute of Environment, Florida International University, University Park, Miami, FL 33199, USA
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Rautenberg GE, Bonifacio AF, Chiappero MB, Amé MV, Hued AC. Genetic Structure of a Native Neotropical Fish Species: New Insights about a South American Bioindicator. ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2022; 83:168-179. [PMID: 35963961 DOI: 10.1007/s00244-022-00952-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Accepted: 07/15/2022] [Indexed: 06/15/2023]
Abstract
The biodiversity of Neotropical region is affected by anthropogenic disturbance. Throughout Brazil, Argentina and Uruguay, the native fish, Cnesterodon decemmaculatus, is well distributed and widely used as an excellent bioindicator of environmental quality. We investigated the diversity and genetic structure of its populations along a water pollution gradient to answer the following questions: 1- Does the genetic diversity decrease under the stressful conditions of a severe water quality gradient? and 2- Is there any relationship between the haplotypes registered along the studied basin and those recorded in other distant basins? Two mitochondrial DNA markers, Cytochrome b and D-loop, were analyzed and four haplotypes were registered for both markers along the basin. H1 was present throughout all the river sections in high frequencies leading to a low genetic diversity. We suggest that only a few haplotypes tolerate the stressful conditions of mountain rivers. On the other hand, the presence of H4 at the site located downstream suggests a history of recent colonization from the southeast to the northwest of the biome. These results, together with the abundance decrease along the pollution gradient, and the non-migratory characteristic of C. decemmaculatus suggest that its populations may be at risk of local extinction.
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Affiliation(s)
- Gisela E Rautenberg
- Instituto de Diversidad Y Ecología Animal (IDEA), CONICET (Consejo Nacional de Investigaciones Científicas Y Técnicas), Av. Vélez Sarsfield 299, 5000, Córdoba, CP, Argentina
- Facultad de Ciencias Exactas, Físicas Y Naturales, Cátedra de Diversidad Biológica IV, Universidad Nacional de Córdoba, Av. Vélez Sarsfield 299, 5000, Córdoba, CP, Argentina
| | - Alejo F Bonifacio
- Instituto de Diversidad Y Ecología Animal (IDEA), CONICET (Consejo Nacional de Investigaciones Científicas Y Técnicas), Av. Vélez Sarsfield 299, 5000, Córdoba, CP, Argentina
- Facultad de Ciencias Exactas, Físicas Y Naturales, Cátedra de Diversidad Biológica IV, Universidad Nacional de Córdoba, Av. Vélez Sarsfield 299, 5000, Córdoba, CP, Argentina
- Facultad de Ciencias Exactas, Físicas Y Naturales, Cátedra de Morfología Animal, Universidad Nacional de Córdoba, Av. Vélez Sarsfield 299, 5000, Córdoba, Argentina
| | - Marina B Chiappero
- Facultad de Ciencias Exactas, Físicas Y Naturales, Cátedra de Diversidad Biológica IV, Universidad Nacional de Córdoba, Av. Vélez Sarsfield 299, 5000, Córdoba, CP, Argentina
- Facultad de Ciencias Exactas, Físicas Y Naturales, Cátedra de Genética de Poblaciones Y Evolución, Universidad Nacional de Córdoba, Av. Vélez Sarsfield 299, 5000, Córdoba, CP, Argentina
| | - María V Amé
- Facultad Ciencias Químicas, Dto. Bioquímica Clínica - CIBICI, Universidad Nacional de Córdoba - CONICET, Haya de La Torre Esq. Medina Allende, Ciudad Universitaria, 5000, Córdoba, Argentina
| | - Andrea C Hued
- Instituto de Diversidad Y Ecología Animal (IDEA), CONICET (Consejo Nacional de Investigaciones Científicas Y Técnicas), Av. Vélez Sarsfield 299, 5000, Córdoba, CP, Argentina.
- Facultad de Ciencias Exactas, Físicas Y Naturales, Cátedra de Diversidad Biológica IV, Universidad Nacional de Córdoba, Av. Vélez Sarsfield 299, 5000, Córdoba, CP, Argentina.
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González Núñez AA, Ferro JP, Campos LB, Eissa BL, Mastrángelo MM, Ferrari L, Ossana NA. Evaluation of the Acute Effects of Arsenic on Adults of the Neotropical Native Fish Cnesterodon decemmaculatus Using a Set of Biomarkers. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2022; 41:1246-1259. [PMID: 35088913 DOI: 10.1002/etc.5299] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Revised: 09/17/2021] [Accepted: 01/21/2022] [Indexed: 06/14/2023]
Abstract
Neotropical fish Cnesterodon decemmaculatus were exposed to different sublethal concentrations (0.5, 1.0 and 5.0 mg As/L) of sodium arsenite (As III) to determine the median lethal concentration (LC50; 96 h) and to evaluate the response of a set of biomarkers (genotoxic, behavioral, biochemical, and metabolic). At the end of the exposure (96 h), fish were video-recorded for behavior assessment. We used the micronucleus and nuclear abnormality tests and the comet assay in peripheral blood as genotoxicity biomarkers. In regard to biochemical and metabolic biomarkers, we dissected the brain for acetylcholinesterase (AChE) activity; the liver for glutathione-S-transferase (GST) and catalase (CAT) activity and glutathione content (GSH); the gills for GSH content; and muscle for AChE, energy metabolism of lipids, carbohydrates, and proteins, and the electron transport system activity of the mitochondrial chain. We calculated an index using metabolic biomarkers, to determine the cellular energy allocation. The LC50 value was 7.32 mg As/L. The As affected some swimming parameters in females. No significant differences in micronucleus were found compared with the control, whereas nuclear aberrations increased significantly at 1.0 and 5.0 mg As/L. The genomic damage index and the percentage of cells with DNA damage (measured by the comet assay) showed a significant increase in the As-treated groups, and this technique was the most sensitive for detecting genotoxic damage. The As affected the antioxidant system (mainly GSH, CAT, and GST) and reduced the lipid content. A preliminary baseline was generated for the response of C. decemmaculatus exposed to sublethal concentrations of As, when it alters swimming behavior and the antioxidant system, has genotoxic effects, and reduces lipid content. Environ Toxicol Chem 2022;41:1246-1259. © 2022 SETAC.
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Affiliation(s)
- Ayelén A González Núñez
- Programa de Ecofisiología Aplicada, Departamento de Ciencias Básicas, Universidad Nacional de Luján, Luján, Buenos Aires, Argentina
- Instituto de Ecología y Desarrollo Sustentable (Universidad Nacional de Luján, Consejo Nacional de Investigaciones Científicas y Técnicas), Luján, Buenos Aires, Argentina
| | - Juan P Ferro
- Programa de Ecofisiología Aplicada, Departamento de Ciencias Básicas, Universidad Nacional de Luján, Luján, Buenos Aires, Argentina
- Instituto de Ecología y Desarrollo Sustentable (Universidad Nacional de Luján, Consejo Nacional de Investigaciones Científicas y Técnicas), Luján, Buenos Aires, Argentina
| | - Liria B Campos
- Programa de Ecofisiología Aplicada, Departamento de Ciencias Básicas, Universidad Nacional de Luján, Luján, Buenos Aires, Argentina
- Instituto de Ecología y Desarrollo Sustentable (Universidad Nacional de Luján, Consejo Nacional de Investigaciones Científicas y Técnicas), Luján, Buenos Aires, Argentina
| | - Bettina L Eissa
- Programa de Ecofisiología Aplicada, Departamento de Ciencias Básicas, Universidad Nacional de Luján, Luján, Buenos Aires, Argentina
- Instituto de Ecología y Desarrollo Sustentable (Universidad Nacional de Luján, Consejo Nacional de Investigaciones Científicas y Técnicas), Luján, Buenos Aires, Argentina
| | - Martina M Mastrángelo
- Programa de Ecofisiología Aplicada, Departamento de Ciencias Básicas, Universidad Nacional de Luján, Luján, Buenos Aires, Argentina
- Instituto de Ecología y Desarrollo Sustentable (Universidad Nacional de Luján, Consejo Nacional de Investigaciones Científicas y Técnicas), Luján, Buenos Aires, Argentina
| | - Lucrecia Ferrari
- Programa de Ecofisiología Aplicada, Departamento de Ciencias Básicas, Universidad Nacional de Luján, Luján, Buenos Aires, Argentina
| | - Natalia A Ossana
- Programa de Ecofisiología Aplicada, Departamento de Ciencias Básicas, Universidad Nacional de Luján, Luján, Buenos Aires, Argentina
- Instituto de Ecología y Desarrollo Sustentable (Universidad Nacional de Luján, Consejo Nacional de Investigaciones Científicas y Técnicas), Luján, Buenos Aires, Argentina
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Suárez B, Barrios M, Teixeira de Mello F. Macroinvertebrates’ response to different land use in lowland streams from Uruguay: use of artificial substrates for biomonitoring. NEOTROPICAL BIODIVERSITY 2022. [DOI: 10.1080/23766808.2022.2049178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
Affiliation(s)
- Bárbara Suárez
- Departamento de Ecología y Gestión Ambiental, Centro Universitario Regional del Este (CURE), Universidad de la República, Maldonado, Uruguay
| | - Margenny Barrios
- Departamento de Ecología y Gestión Ambiental, Centro Universitario Regional del Este (CURE), Universidad de la República, Maldonado, Uruguay
| | - Franco Teixeira de Mello
- Departamento de Ecología y Gestión Ambiental, Centro Universitario Regional del Este (CURE), Universidad de la República, Maldonado, Uruguay
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Moi DA, Teixeira-de-Mello F. Cascading impacts of urbanization on multitrophic richness and biomass stock in neotropical streams. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 806:151398. [PMID: 34742800 DOI: 10.1016/j.scitotenv.2021.151398] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Revised: 10/18/2021] [Accepted: 10/30/2021] [Indexed: 06/13/2023]
Abstract
The conversion of natural streams to urbanized systems with the intention of supplying the cities' water demand causes species loss across many trophic groups, with negative consequences for ecosystem functioning. High levels of watershed urbanization cause environmental changes through water quality deterioration and loss of habitat heterogeneity. However, it remains unclear how environmental changes resulting from urbanization affect the diversity of multiple trophic groups and ecosystem functions, such as biomass stock in streams. Here, using a dataset from Neotropical streams, we investigate the cascading effects of urbanization (via impoverishment of water quality and habitat heterogeneity) on richness of multiple trophic groups of fish, and their consequences to biomass stock of streams. The increase in urbanization decreased the richness and standing biomass of carnivores, omnivores, and detritivores across streams. Urbanization also decreased habitat heterogeneity and water quality, which driver a huge cascading decrease in the richness of carnivores, omnivores, and detritivores, and ultimately reduced the whole-community standing biomass. Our analysis revealed that urbanization expansion induces a cascading reduction of multitrophic diversity and standing biomass in Neotropical streams. Therefore, the predicted increase in urbanization in the coming decades should impacts the richness of multiple trophic levels, with potential negative consequences to ecosystem functioning of streams.
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Affiliation(s)
- Dieison André Moi
- Department of Biology, Graduate Program in Ecology of Inland Waters, Nupelia, University of Maringá, Av. Colombo 5790, Bloco H90, Jd. Universitário, Maringá, PR 87020-900, Brazil.
| | - Franco Teixeira-de-Mello
- Departamento de Ecología y Gestión Ambiental CURE, Universidad de la República, Tacuarembó s/n, Maldonado, Uruguay.
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Santamaría-Martín CJ, Plaul SE, Campuzano Caballero JC, Uribe MC, Barbeito CG. Structure of the gonoduct of the viviparous teleost Cnesterodon decemmaculatus (Jenyns, 1842) (Poeciliidae). J Morphol 2021; 282:533-542. [PMID: 33486767 DOI: 10.1002/jmor.21326] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 01/15/2021] [Accepted: 01/20/2021] [Indexed: 11/12/2022]
Abstract
During embryogenesis, teleost females do not develop Müllerian ducts, which form the oviducts in all other vertebrates. Thus, when they reach sexual maturity they do not have oviducts. In viviparous teleosts, the lack of oviducts means that the development of the embryos occurs as an intraovarian gestation, unique among vertebrates. The ovary is an unpaired hollow organ whose cavity is continuous with the caudal portion, the gonoduct, characterized by the absence of germinal cells, which opens to the exterior at the gonopore. The gonoduct attains essential function as a barrier between the germinal region of the ovary and the exterior during all reproductive stages. This study describes the functional morphology of the gonoduct in the viviparous teleost Cnesterodon decemmaculatus during non-gestation (previtellogenesis and vitellogenesis) and gestation. The ovaries were processed using histological techniques and stained with hematoxylin-eosin, and periodic acid Schiff. The gonoduct has two regions: cephalic and caudal, and is formed by three histological layers, which are, from inside to the periphery: (a) tunica mucosa; (b) tunica muscularis; and (c) tunica serosa. In the cephalic region there are mucosal folds extending into the lumen and forming a structure similar to a cervix. The histology of the gonoduct indicates essential functions, that is, (a) the control of the luminal diameter in the limit to the germinal region of the ovary by the presence of a cervix; (b) during insemination the gonoduct receives the spermatozoa, may store and transport them to the germinal region; (c) the presence of melano-macrophage centers indicates support of immunological processes, especially during gestation when these centers increase in size; (d) production of exocrine secretions; and (e) it is the birth canal, internally lined by an ciliated epithelium and surrounded by smooth musclesboth tissues supposedly supporting the birth process.
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Affiliation(s)
- Carlos J Santamaría-Martín
- Laboratorio de Histología y Embriología Descriptiva, Experimental y Comparada (LHYEDEC), Facultad de Ciencias Veterinarias (FCV), Universidad Nacional de La Plata (UNLP), Buenos Aires, Argentina
| | - Silvia E Plaul
- Laboratorio de Histología y Embriología Descriptiva, Experimental y Comparada (LHYEDEC), Facultad de Ciencias Veterinarias (FCV), Universidad Nacional de La Plata (UNLP), Buenos Aires, Argentina
| | - Juan C Campuzano Caballero
- Laboratorio de Biología de la Reproducción Animal, Departamento de Biología Comparada, Facultad de Ciencias, Universidad Nacional Autónoma de México, Ciudad de México, México
| | - Mari C Uribe
- Laboratorio de Biología de la Reproducción Animal, Departamento de Biología Comparada, Facultad de Ciencias, Universidad Nacional Autónoma de México, Ciudad de México, México
| | - Claudio G Barbeito
- Laboratorio de Histología y Embriología Descriptiva, Experimental y Comparada (LHYEDEC), Facultad de Ciencias Veterinarias (FCV), Universidad Nacional de La Plata (UNLP), Buenos Aires, Argentina
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Baudou FG, Eissa BL, Ossana NA, Mastrángelo MM, Ferro JP, Campos LB, Ferrari L. First baseline for bioenergetic biomarkers in Cnesterodon decemmaculatus as test organism in ecotoxicological studies. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 208:111639. [PMID: 33396159 DOI: 10.1016/j.ecoenv.2020.111639] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 11/04/2020] [Accepted: 11/06/2020] [Indexed: 06/12/2023]
Abstract
Cnesterodon decemmaculatus is a Neotropical teleost fish frequently used in ecotoxicological evaluations, whose biology has been thoroughly studied. Although there is considerable information on its response to different toxicants, no range of reference values has been so far established for the different biological parameters proposed as biomarkers of effect or exposure. Moreover, no study has yet examined the possible influence of the metabolic status of the exposed animals on their response to toxic stress. Therefore, the aim of this work was to provide a first baseline for a set of bioenergetic biomarkers in C. decemmaculatus adults exposed to a control medium under previously standardized conditions, and to assess their possible intrinsic seasonal variability. The responses of the biomarkers obtained from the controls were contrasted with those from the reference toxicant (Cadmio-Cd) and receiving waters (surface waters of the Reconquista River RR, Buenos Aires Province, Argentina). We conducted four 12-day assays (one in each season) of exposure to control media, (reconstituted moderate hard water, MHW) and two assays of exposure to Cd in MHW and surface river water (RR) in both summer and autumn. The variables recorded were: Food intake (In), fecal production (F), specific assimilation (A) and cumulative mortality, oxygen extraction efficiency (OEE), specific metabolic rate (SMR), ammonia excretion (N), ammonia quotient (AQ) and scope for growth (SFG). The seasonal variation shown by some physiological parameters, points to the need for establishing a baseline obtained from standardized media, preferably on a seasonal basis. Moreover, SFG and A appeared as the most sensitive biomarkers, emphasizing the importance to consider the metabolic status of the test organisms for the appropriate interpretation of results from ecotoxicological studies performed under controlled experimental conditions. The obtained results provide useful information on C. decemmaculatus as model species in ecotoxicological bioassays involving biomarkers of early effect.
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Affiliation(s)
- Federico G Baudou
- Laboratorio de Inmunología, Departamento de Ciencias Básicas, Universidad Nacional de Lujan, B6700ZBA Luján, Argentina; Instituto de Ecología y Desarrollo Sustentable (INEDES), Universidad Nacional de Luján - CONICET, P.O. Box 221, B6700ZBA Luján, Argentina.
| | - Bettina L Eissa
- Instituto de Ecología y Desarrollo Sustentable (INEDES), Universidad Nacional de Luján - CONICET, P.O. Box 221, B6700ZBA Luján, Argentina; Programa de Ecofisiología Aplicada (PRODEA), Departamento de Ciencias Básicas, Universidad Nacional de Lujan, P.O. Box 221, B6700ZBA Luján, Argentina
| | - Natalia A Ossana
- Instituto de Ecología y Desarrollo Sustentable (INEDES), Universidad Nacional de Luján - CONICET, P.O. Box 221, B6700ZBA Luján, Argentina; Programa de Ecofisiología Aplicada (PRODEA), Departamento de Ciencias Básicas, Universidad Nacional de Lujan, P.O. Box 221, B6700ZBA Luján, Argentina
| | - Martina M Mastrángelo
- Instituto de Ecología y Desarrollo Sustentable (INEDES), Universidad Nacional de Luján - CONICET, P.O. Box 221, B6700ZBA Luján, Argentina; Programa de Ecofisiología Aplicada (PRODEA), Departamento de Ciencias Básicas, Universidad Nacional de Lujan, P.O. Box 221, B6700ZBA Luján, Argentina
| | - Juan P Ferro
- Instituto de Ecología y Desarrollo Sustentable (INEDES), Universidad Nacional de Luján - CONICET, P.O. Box 221, B6700ZBA Luján, Argentina; Programa de Ecofisiología Aplicada (PRODEA), Departamento de Ciencias Básicas, Universidad Nacional de Lujan, P.O. Box 221, B6700ZBA Luján, Argentina
| | - Liria B Campos
- Instituto de Ecología y Desarrollo Sustentable (INEDES), Universidad Nacional de Luján - CONICET, P.O. Box 221, B6700ZBA Luján, Argentina; Programa de Ecofisiología Aplicada (PRODEA), Departamento de Ciencias Básicas, Universidad Nacional de Lujan, P.O. Box 221, B6700ZBA Luján, Argentina
| | - Lucrecia Ferrari
- Instituto de Ecología y Desarrollo Sustentable (INEDES), Universidad Nacional de Luján - CONICET, P.O. Box 221, B6700ZBA Luján, Argentina
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Bonifacio AF, Zambrano MJ, Hued AC. Integrated ecotoxicological assessment of the complex interactions between chlorpyrifos and glyphosate on a non-target species Cnesterodon decemmaculatus (Jenyns, 1842). CHEMOSPHERE 2020; 261:127782. [PMID: 32750624 DOI: 10.1016/j.chemosphere.2020.127782] [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: 05/27/2020] [Revised: 07/16/2020] [Accepted: 07/17/2020] [Indexed: 06/11/2023]
Abstract
Pesticide mixtures are frequent in freshwaters systems around the world, threatening the biota exposed to these conditions. The aim of this study was to determine the single and joint effect of two widely used pesticides in southern South America on a widely distributed fish species. In a 96-h assay, individuals of Cnesterodon decemmaculatus were exposed to 0.84 nL/L and 8.4 nL/L of Clorfox and 0.2 mg/L and 2 mg/L of Roundup Max, commercial formulations of chlorpyrifos and glyphosate, respectively. Also, there were four mixture treatments with all the possible combinations of both pesticides. A multi-level approach was carried out to assess their effects covering the following relevant biomarkers: behavior (immobile time, line crossings and average speed), somatic conditions (Fulton condition factor and hepatosomatic index), serum parameters (cortisol levels, lactate dehydrogenase (LDH), and creatine phosphokinase activity (CPK)), brain and muscle acetylcholinesterase and cytological characteristics (micronuclei frequency and nuclear abnormalities in erythrocytes). Our results showed that Clorfox exposures affect behavioral parameters, serum cortisol, and nuclear characteristics of erythrocytes. Roundup Max affects only the cortisol levels whereas mixture treatments have an effect on behavioral parameters, cortisol levels, LDH and CPK activities, and nuclear characteristics of erythrocytes. Potentiation was the main interaction at the lowest concentrations of both pesticides whereas antagonism occurred at the highest concentrations of both pesticides. These results are highly significant since they arise from an integrated ecotoxicological assessment at several levels of biological organization but even more important is that the potentiated effects of the mixtures we registered are environmentally relevant concentrations.
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Affiliation(s)
- Alejo Fabian Bonifacio
- Universidad Nacional de Córdoba, Facultad de Ciencias Exactas, Físicas y Naturales. Cátedra de Diversidad Animal II, Córdoba, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Instituto de Diversidad y Ecología Animal (IDEA), Córdoba, Argentina
| | - Micaela Jimena Zambrano
- Universidad Nacional de Córdoba, Facultad de Ciencias Exactas, Físicas y Naturales. Cátedra de Diversidad Animal II, Córdoba, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Instituto de Diversidad y Ecología Animal (IDEA), Córdoba, Argentina
| | - Andrea Cecilia Hued
- Universidad Nacional de Córdoba, Facultad de Ciencias Exactas, Físicas y Naturales. Cátedra de Diversidad Animal II, Córdoba, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Instituto de Diversidad y Ecología Animal (IDEA), Córdoba, Argentina.
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Young BJ, Cristos DS, Crespo DC, Somoza GM, Carriquiriborde P. Effects of 17α-ethinylestradiol on sex ratio, gonadal histology and perianal hyperpigmentation of Cnesterodon decemmaculatus (Pisces, Poeciliidae) during a full-lifecycle exposure. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 205:111176. [PMID: 32846301 DOI: 10.1016/j.ecoenv.2020.111176] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 07/16/2020] [Accepted: 08/11/2020] [Indexed: 06/11/2023]
Abstract
The effects of 17α-ethinylestradiol (EE2) on sex ratio, gonopodium morphology, and gonadal histology of C. decemmaculatus were assessed by a full-lifecycle exposure experiment. Newborn fish were waterborne exposed to 30, 100, and 300 ng EE2/L for 90 d, using 50 fish per treatment. Additionally, in December of 2016, a field survey was conducted on a C. decemmaculatus population inhabiting the Girado Creek downstream of the Chascomus city wastewater effluent discharge. After 90 d of exposure, EE2 was able to histologically skew the sex ratio toward females and inhibit the full gonopodium development since the lowest tested concentration (LOEC = 30 ng/L). At higher concentrations, EE2 was toxic, inducing mortality in a concentration-dependent fashion (90 d-LC50 = 109.9 ng/L) and altering the gonadal histoarchitecture, causing neither testes nor ovaries discernible histologically (LOEC = 100 ng/L). In addition, a novel response, perianal hyperpigmentation, was discovered been induced by the EE2 exposure in a concentration-dependent fashion (90 d-EC50 = 39.3 ng/L). A higher proportion of females and perianal hyperpigmentation were observed in wild fish collected from the Girado Creek. The major reached conclusions are: i) EE2 induce different effects on the sexual traits of C. decemmaculatus when exposed from early-life or adult stages. ii) The most sensitive effects observed in the laboratory occur in a creek receiving wastewater effluent. iii) The perianal hyperpigmentation comes-up as a promising biomarker of exposure to estrogenic compounds.
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Affiliation(s)
- Brian Jonathan Young
- Instituto Nacional de Tecnología Agropecuaria (INTA), Instituto de Microbiología y Zoología Agrícola (IMYZA), Hurlingham, Argentina
| | - Diego Sebastián Cristos
- Instituto Nacional de Tecnología Agropecuaria (INTA), Instituto de Tecnología de Alimentos (ITA), Hurlingham, Argentina
| | - Diana Cristina Crespo
- Instituto Nacional de Tecnología Agropecuaria (INTA), Instituto de Microbiología y Zoología Agrícola (IMYZA), Hurlingham, Argentina
| | | | - Pedro Carriquiriborde
- Centro de Investigaciones Del Medioambiente (Universidad Nacional de La Plata-CONICET), La Plata, Argentina.
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