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001-es BibID:BIBFORM108041
035-os BibID:(cikkazonosító)e09069 (WOS)000784250800008 (Scopus)85125934386
Első szerző:Georgieva, Elenka
Cím:Biomarkers for pollution in caged mussels from three reservoirs in Bulgaria : a pilot study / Elenka Georgieva, László Antal, Stela Stoyanova, Desislava Arnaudova, Iliana Velcheva, Ilia Iliev, Tonka Vasileva, Veselin Bivolarski, Vesela Mitkovska, Tsenka Chassovnikarova, Borislava Todorova, Ifeanyi Emmanuel Uzochukwu, Krisztián Nyeste, Vesela Yancheva
Dátum:2022
ISSN:2405-8440
Megjegyzések:The mussel-watch concept was firstly proposed in 1975, which was later adopted by several international monitoring programs worldwide. However, for the very first time, a field experiment with caged mussels was performed in three reservoirs in Bulgaria to follow the harmful effects of sub-chronic pollution (30 days) of metals, trace, and macro-elements, as well as some organic toxicants, such as polybrominated diphenyl ethers and chlorinated paraffins. Therefore, we studied the biometric indices, histochemical lesions in the gills, biochemical changes in the digestive glands (antioxidant defense enzymes, such as catalase, glutathione reductase, and glutathione peroxidase; metabolic enzymes, such as lactate dehydrogenase, alanine aminotransferase, and aspartate aminotransferase, and the neurotransmitter cholinesterase), in addition to the DNA damage in the Chinese pond mussel, Sinanodonta woodiana (Lea, 1834) in Kardzhali, Studen Kladenets and Zhrebchevo reservoirs in Bulgaria. Significant correlation trends between the pollution levels, which we reported before, and the biomarker responses were established in the current paper. Overall, we found that both tested organs were susceptible to pollution-induced oxidative stress. The different alterations in the selected biomarkers in the caged mussels compared to the reference group were linked to the different kinds and levels of water pollution in the reservoirs, and also to the simultaneously conducted bioaccumulation studies.
Tárgyszavak:Természettudományok Környezettudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Heliyon. - 8 : 3 (2022), p. 1-14. -
További szerzők:Antal László (1984-) (hidrobiológus, biológus-ökológus) Stoyanova, Stela Arnaudova, Desislava Velcheva, Iliana Iliev, Ilia Vasileva, Tonka Bivolarski, Veselin Mitkovska, Vesela Chassovnikarova, Tsenka Todorova, Borislava Uzochukwu, Ifeanyi Emmanuel (1989-) Nyeste Krisztián József (1993-) (hidrobiológus) Yancheva, Vesela
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2.

001-es BibID:BIBFORM098758
035-os BibID:(Scopus)85107909516 (WOS)000666688500001
Első szerző:Georgieva, Elenka
Cím:Which Is More Toxic? Evaluation of the Short-Term Toxic Effects of Chlorpyrifos and Cypermethrin on Selected Biomarkers in Common Carp (Cyprinus carpio, Linnaeus 1758) / Elenka Georgieva, Vesela Yancheva, Stela Stoyanova, Iliana Velcheva, Ilia Iliev, Tonka Vasileva, Veselin Bivolarski, Eleonora Petkova, Brigitta László, Krisztián Nyeste, László Antal
Dátum:2021
ISSN:2305-6304
Megjegyzések:The general aim of this study was to investigate the negative short-term effects of different concentrations of chlorpyrifos (CPF) and cypermethrin (CYP), based on the EU legislation (MAC-EQS) in common carp (Cyprinus carpio Linnaeus, 1758) under laboratory conditions and to compare their toxicity. The fish were exposed to the pesticides for 96 h and then different histological and biochemical biomarkers were investigated in the gills and liver, and bioaccumulation analyses were conducted. The chemical studies showed increased pesticide concentrations in the gills as the first site for pollutants compared to the liver at the 96th hour. In addition, the histological analyses showed severe alterations in the gills and liver after exposure to both tested pesticides. In the gills, we found mainly intense proliferative and, to a lesser extent, degenerative changes and alterations in the circulatory system, such as necrosis and vasodilation. In the liver, regressive and progressive lesions, as well as circulatory disturbances and inflammation, were observed. The regressive lesions showed a higher degree of expression compared to the other changes. Furthermore, we found altered enzymatic activities?catalase, glutathione reductase, and glutathione peroxidase?in the liver, compared to the control. Overall, both tested pesticides impacted the studied biomarkers in common carp, even at concentrations lower than those permitted by law. However, the results of the comparative analysis showed a relatively higher toxicity of CYP compared to CPF in the fish. Still, questions persist as to whether the observed changes are adaptive or entirely destructive. To avoid any danger or risk, these pesticides must be applied cautiously, especially near water bodies.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
pesticides
water
contamination
fish
biomarkers
Megjelenés:Toxics. - 9 : 6 (2021), p. 125-. -
További szerzők:Yancheva, Vesela Stoyanova, Stela Velcheva, Iliana Iliev, Ilia Vasileva, Tonka Bivolarski, Veselin Petkova, Eleonora László Brigitta (1983-) (molekuláris biológus, mikrobiológus) Nyeste Krisztián József (1993-) (hidrobiológus) Antal László (1984-) (hidrobiológus, biológus-ökológus)
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Intézményi repozitóriumban (DEA) tárolt változat
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3.

001-es BibID:BIBFORM086899
035-os BibID:(cikkazonosító)1837 (Scopus)85087543650 (WoS)000552442200001
Első szerző:Stoyanova, Stela
Cím:Multi-Biomarker Assessment in Common Carp (Cyprinus carpio, Linnaeus 1758) Liver after Acute Chlorpyrifos Exposure / Stela Stoyanova, Elenka Georgieva, Iliana Velcheva, Ilia Iliev, Tonka Vasileva, Veselin Bivolarski, Stoil Tomov, Krisztián Nyeste, László Antal, Vesela Yancheva
Dátum:2020
ISSN:2073-4441
Tárgyszavak:Természettudományok Környezettudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Water. - 12 : 6 (2020), p. 1-19. -
További szerzők:Georgieva, Elenka Velcheva, Iliana Iliev, Ilia Vasileva, Tonka Bivolarski, Veselin Tomov, Stoil Nyeste Krisztián József (1993-) (hidrobiológus) Antal László (1984-) (hidrobiológus, biológus-ökológus) Yancheva, Vesela
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Intézményi repozitóriumban (DEA) tárolt változat
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4.

001-es BibID:BIBFORM108052
035-os BibID:(cikkazonosító)109446 (WOS)000854002600002 (Scopus)85136572408
Első szerző:Yancheva, Vesela
Cím:Assessment of the exposure of two pesticides on common carp (Cyprinus carpio Linnaeus, 1758) : are the prolonged biomarker responses adaptive or destructive? / Vesela Yancheva, Elenka Georgieva, Iliana Velcheva, Ilia Iliev, Stela Stoyanova, Tonka Vasileva, Veselin Bivolarski, Dobrinka Todorova-Bambaldokova, Nurfatin Zulkipli, László Antal, Krisztián Nyeste
Dátum:2022
ISSN:1532-0456
Megjegyzések:Chlorpyrifos (CPF) and cypermethrin (CYP) are two insecticides that have a proven negative effect on non-target aquatic organisms when they enter the surface waters. However, literature on the comparative effects of these pesticides on important aquaculture fish species, such as common carp (Cyprinus carpio Linnaeus, 1758) is not yet scientifically detailed, especially over the long-term. The idea of conducting a long-term exposure is to find out how the observed biomarkers would change compared to the short-term exposure. In the natural environment, toxicants are not present alone, but in combination. By monitoring the long-term impact of individual substances, the state of aquatic ecosystems exposed to various toxicants could be predicted. Thus, this study aimed to evaluate the toxicity of different concentrations of CYP (0.0002, 0.0003, and 0.0006 mu g/L) and CPF (0.03, 0.05, and 0.10 mu g/L) in 50-L glass tanks on C. carpio, exposed for 30 days under laboratory conditions. A set of his-tological and biochemical biomarkers in the gills and liver were applied with the chemical analyses of water and fish organs. Furthermore, the condition and hepatosomatic index were calculated to assess the physiological status of the treated carps. The behavioral responses were also monitored, and the respiration rate was analyzed. The results suggest that CYP had a more prominent effect on the histological structure of fish organs, biochemical responses of anti-oxidant enzymes, behavior, and respiration rate compared to the effect of CPF. In addition, the results also indicate that the liver is more susceptible to chronic and chemically induced cellular stress compared to the gills, with overall destructive changes in the histological biomarkers rather than adaptive. Regardless of the scenario, our results provide novel insights into pesticide exposure and the possible biological impacts on economically important freshwater fish, exposed to lower CYP and CPF concentrations, based on the EU legis-lation (maximum allowable concentrations, MAC-EQS).
Tárgyszavak:Természettudományok Környezettudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Comparative Biochemistry And Physiology C-Toxicology & Pharmacology. - 261 (2022), p. 1-17. -
További szerzők:Georgieva, Elenka Velcheva, Iliana Iliev, Ilia Stoyanova, Stela Vasileva, Tonka Bivolarski, Veselin Todorova-Bambaldokova, Dobrinka Zulkipli, Nurfatin Antal László (1984-) (hidrobiológus, biológus-ökológus) Nyeste Krisztián József (1993-) (hidrobiológus)
Pályázati támogatás:TKP2021-NKTA-32
egyéb
ÚNKP-22-4
egyéb
ÚNKP-22-5
egyéb
RRF 2.3.1-21-2022-00008
egyéb
GINOP_PLUSZ- 2.1.1-21-2022-00245
egyéb
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Intézményi repozitóriumban (DEA) tárolt változat
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