Chromosomal damage in fish (Anguilla anguilla L.) induced by the fungicide Macozan® upon exposure and post-exposure periods
Mestrado em Biologia Aplicada Mancozan® is a dithiocarbamate fungicide used worldwide and its consumption has been increasing year after year. Due to its extensive use, their metabolites can be easily found in aquatic ecosystems around the world, representing thus a potential hazard to non-target or...
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Universidade de Aveiro
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ftria:oai:ria.ua.pt:10773/16837 2023-05-15T13:26:52+02:00 Chromosomal damage in fish (Anguilla anguilla L.) induced by the fungicide Macozan® upon exposure and post-exposure periods Dano cromossómico em peixes (Anguilla anguilla L.) induzido por exposição ao fungicida Macozan® e em período de pós-exposição Crespo, Rodrigo Dinis Guilherme, Sofia Isabel Antunes Gomes Pacheco, Mário Guilherme Garcês 2016 http://hdl.handle.net/10773/16837 eng eng Universidade de Aveiro http://hdl.handle.net/10773/16837 201591502 openAccess Biologia Biologia aquática Contaminação da água Fungicidas - Toxicidade Peixes - Cromossomas Toxicologia genética Aquatic contamination Mancozan® Anguilla anguilla Chromosomal damage Erithrocyte maturity index (EMI) masterThesis 2016 ftria 2022-05-25T18:35:22Z Mestrado em Biologia Aplicada Mancozan® is a dithiocarbamate fungicide used worldwide and its consumption has been increasing year after year. Due to its extensive use, their metabolites can be easily found in aquatic ecosystems around the world, representing thus a potential hazard to non-target organisms. Many studies performed with its active ingredient, mancozeb, have demonstrated its negative impact to fish. However, the toxic effects, and particularly the genotoxic potential of the commercial formulation Mancozan® are still poorly understood. Thus, and in order to improve the knowledge concerning this thematic, the present study aimed to evaluate the genotoxic potential of the fungicide Mancozan® to blood cells of the European eel (Anguilla anguilla) following a short-term (3 days) exposure to environmental realistic concentrations (2.8 and 28 μg.L-1). With the intuit of investigate the damage progression after the contamination source cessation, a post-exposure period (1, 7 and 14 days) was included, where fish were transferred to fungicide-free water. In order to evaluate the genetic damage, the ENA (erythrocytic nuclear abnormalities) assay was performed. Additionally, the frequency of immature erythrocytes (IE) was scored in order to provide indirect information on the erythrocyte catabolism and erythropoiesis rate. As a complement, the EMI (erythrocyte maturity index) was adopted in order to better discriminate the stage of erythrocytic immaturity. The obtained results demonstrated the potential of the highest concentration of Mancozan® to induce chromosomal damage, following a 3 days exposure, as well as a rapid recover in the post-exposure period. On the other hand, the lowest concentration of the commercial formulation was able to induce chromosomal damage only 14 days after the end of the exposure period, suggesting a progressive degradation and the collapse of eel erythrocytes defences. At the same time it was observed, through the IE assay and the calculation of the EMI, that the balance ... Master Thesis Anguilla anguilla Repositório Institucional da Universidade de Aveiro (RIA) |
institution |
Open Polar |
collection |
Repositório Institucional da Universidade de Aveiro (RIA) |
op_collection_id |
ftria |
language |
English |
topic |
Biologia Biologia aquática Contaminação da água Fungicidas - Toxicidade Peixes - Cromossomas Toxicologia genética Aquatic contamination Mancozan® Anguilla anguilla Chromosomal damage Erithrocyte maturity index (EMI) |
spellingShingle |
Biologia Biologia aquática Contaminação da água Fungicidas - Toxicidade Peixes - Cromossomas Toxicologia genética Aquatic contamination Mancozan® Anguilla anguilla Chromosomal damage Erithrocyte maturity index (EMI) Crespo, Rodrigo Dinis Chromosomal damage in fish (Anguilla anguilla L.) induced by the fungicide Macozan® upon exposure and post-exposure periods |
topic_facet |
Biologia Biologia aquática Contaminação da água Fungicidas - Toxicidade Peixes - Cromossomas Toxicologia genética Aquatic contamination Mancozan® Anguilla anguilla Chromosomal damage Erithrocyte maturity index (EMI) |
description |
Mestrado em Biologia Aplicada Mancozan® is a dithiocarbamate fungicide used worldwide and its consumption has been increasing year after year. Due to its extensive use, their metabolites can be easily found in aquatic ecosystems around the world, representing thus a potential hazard to non-target organisms. Many studies performed with its active ingredient, mancozeb, have demonstrated its negative impact to fish. However, the toxic effects, and particularly the genotoxic potential of the commercial formulation Mancozan® are still poorly understood. Thus, and in order to improve the knowledge concerning this thematic, the present study aimed to evaluate the genotoxic potential of the fungicide Mancozan® to blood cells of the European eel (Anguilla anguilla) following a short-term (3 days) exposure to environmental realistic concentrations (2.8 and 28 μg.L-1). With the intuit of investigate the damage progression after the contamination source cessation, a post-exposure period (1, 7 and 14 days) was included, where fish were transferred to fungicide-free water. In order to evaluate the genetic damage, the ENA (erythrocytic nuclear abnormalities) assay was performed. Additionally, the frequency of immature erythrocytes (IE) was scored in order to provide indirect information on the erythrocyte catabolism and erythropoiesis rate. As a complement, the EMI (erythrocyte maturity index) was adopted in order to better discriminate the stage of erythrocytic immaturity. The obtained results demonstrated the potential of the highest concentration of Mancozan® to induce chromosomal damage, following a 3 days exposure, as well as a rapid recover in the post-exposure period. On the other hand, the lowest concentration of the commercial formulation was able to induce chromosomal damage only 14 days after the end of the exposure period, suggesting a progressive degradation and the collapse of eel erythrocytes defences. At the same time it was observed, through the IE assay and the calculation of the EMI, that the balance ... |
author2 |
Guilherme, Sofia Isabel Antunes Gomes Pacheco, Mário Guilherme Garcês |
format |
Master Thesis |
author |
Crespo, Rodrigo Dinis |
author_facet |
Crespo, Rodrigo Dinis |
author_sort |
Crespo, Rodrigo Dinis |
title |
Chromosomal damage in fish (Anguilla anguilla L.) induced by the fungicide Macozan® upon exposure and post-exposure periods |
title_short |
Chromosomal damage in fish (Anguilla anguilla L.) induced by the fungicide Macozan® upon exposure and post-exposure periods |
title_full |
Chromosomal damage in fish (Anguilla anguilla L.) induced by the fungicide Macozan® upon exposure and post-exposure periods |
title_fullStr |
Chromosomal damage in fish (Anguilla anguilla L.) induced by the fungicide Macozan® upon exposure and post-exposure periods |
title_full_unstemmed |
Chromosomal damage in fish (Anguilla anguilla L.) induced by the fungicide Macozan® upon exposure and post-exposure periods |
title_sort |
chromosomal damage in fish (anguilla anguilla l.) induced by the fungicide macozan® upon exposure and post-exposure periods |
publisher |
Universidade de Aveiro |
publishDate |
2016 |
url |
http://hdl.handle.net/10773/16837 |
genre |
Anguilla anguilla |
genre_facet |
Anguilla anguilla |
op_relation |
http://hdl.handle.net/10773/16837 201591502 |
op_rights |
openAccess |
_version_ |
1766395015574061056 |