Seasonal implications on toxicity biomarkers of Loricariichthys anus (Valenciennes, 1835) from a subtropical reservoir
| Autor: | Vania Lucia Loro, Renato Zanella, Aline Teixeira Marins, Gustavo H. Weimer, Jeane de Lima Costa Gomes, Aline Monique Blank do Amaral |
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| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
Gill Veterinary medicine Environmental Engineering Health Toxicology and Mutagenesis Population 010501 environmental sciences Biology Thiobarbituric Acid Reactive Substances 01 natural sciences 03 medical and health sciences chemistry.chemical_compound TBARS Animals Environmental Chemistry Atrazine Pesticides education Catfishes 0105 earth and related environmental sciences education.field_of_study Public Health Environmental and Occupational Health Aquatic animal General Medicine General Chemistry Propoxur Pesticide Pollution Oxidative Stress 030104 developmental biology chemistry Environmental chemistry Lipid Peroxidation Seasons Agrochemicals Biomarkers Brazil Water Pollutants Chemical Environmental Monitoring Catfish |
| Zdroj: | Chemosphere. 191:876-885 |
| ISSN: | 0045-6535 |
| Popis: | Cropping systems based on intensive land use and continuous application of agricultural chemicals inflict a threat to aquatic organisms since these substances will inevitably be carried in to water bodies where they can accumulate, particularly in lentic sites. Pesticides exposure in aquatic animals can cause changes that can be quantified through biomarkers. Thus, this study aimed to investigate the effects of season on oxidative stress and neurotoxicity biomarkers in Loricariichthys anus from a subtropical reservoir surrounded by agricultural areas in southern Brazil. Ten armored catfish were collected from six sites in February and August 2016. Pesticides present in the water, sediment and muscle were identified and quantified. No pesticides were detected either in sediment nor in muscle. During the winter, the water contained atrazine, imidacloprid, simazine, azoxystrobin, and propoxur; however, in summer, only atrazine was present in the water. In the winter, there was an increase in the hepatic GST activity and in GPx that kept lipid peroxidation (TBARS) constant and, in the summer, there was an increase in metallothioneins levels. In the gills, variables related to summer were possibly responsible for the elevation of GST, GPx and TBARS; during the winter, there was greater carbonylation of proteins. In the winter, the increased AChE activity in brain and muscle tissue was related to carbonylation of proteins in brain. Although the amount of pesticides detected in the water was low, chronic exposure in addition to environmental variations can cause direct and indirect effects on L. anus population. |
| Databáze: | OpenAIRE |
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