Aysel Caglan Gunal

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Gazi University · Department of Biology Education

Ambient Volatile Organic Compounds (VOCs) were investigated to determine their characteristics, Ozone Formation Potentials (OFPs), and health risks in two crude oil production plants (Nusaybin and Egil plants) in southeastern Türkiye. Benzene, toluene, ethylbenzene, m + p xylene, o xylene, and 1,3,5-trimethylbenzene were measured at eight passive s...

ENVIRONMENTAL THREATS TO FRESHWATER MUSSELS: THE ROLE OF SODIUM HYDROXIDE

Tropical Animal Health and Production is a journal founded 55 years ago. It is dedicated to the publication of results of original research, investigation, and observation in all fields of animal health, welfare and production which may lead to improved health and productivity of livestock and better utilization of animal resources in tropical, sub...

Microplastics (MPs) are ubiquitous pollutants in freshwater environments. In this study, freshwater mussels, Unio delicatus, were exposed to both environmental MPs (e-MP) and commercial MPs (c-MP) that include green fluorescent MP (gf-MP), polyethylene (c-PE) and polystyrene (c-PS) at environmental concentrations (5 mg/L and 50 mg/L) over duration...

The study investigated ambient volatile organic compounds (VOCs) at two crude oil production plants (Nusaybin and Egil Plants) in Southeastern Türkiye. The aim was to determine the characteristics of VOCs, along with the Ozone Formation Potentials (OFPs), and the potential health risks associated with exposure to these compounds. Benzene, toluene,...

The widespread use of silver nanoparticles (AgNPs) including water filters, paints, cosmetics, deodorants, clothing, textiles, food packaging, electrical appliances and medical devices inevitably leads to their release into the natural environment, bioaccumulation in organisms and persistent accumulation in natural aquatic systems. The aim of this...

Türkiye, which is one of the important speciation regions of the Palearctic Region, is one of the distribution centers of the genus Dreissena. Since the 1800s, many taxa belonging to the genus have been mentioned, especially by European researchers. However, in recent years, the existence of three taxa has been determined mainly in the lentic syste...

Cyfluthrin is a synthetic pyrethroid that pollutes aquatic ecosystems and is also a potential toxic pollutant. Zebrafish (Danio rerio) were used in acute toxicity tests for bioassays. 96-hour LC50 values were determined for zebrafish. Experiments were performed in triplicate and the static test method of acute toxicity test was used. At the same ti...

In recent years one of the most striking results of over-population and consumption activities in the world is the rapid increase in environmental pollutants. Environmental pollutants, one of the harmful consequences of technological and modern life, threaten the health of people and other living organisms. In this study, we aimed to determine the...

The metallic pyrithiones are used as antifouling paints for marine vehicles against fouling organisms. However, they are dissolved in marine water and have negative impacts on marine non-target organisms. This study evaluated the adverse effects of sodium pyrithione (NaPT) on Mytilus galloprovincialis using total hemocyte counts (THCs), oxidative s...

Perfluorooctane sulfonate (PFOS, C8F17SO3; CAS No. 2795–39-3), an industrial persistent organic pollutant, has been known with significant bioaccumulation and biomagnification potential. The purpose of this study was to demonstrate the effects of PFOS on the aquatic model vertebrate common carp (Cyprinus carpio). Fish were exposed to 1 and 10 mg/L...

Fipronil (C12H4Cl2F6N4OS, CAS No: 120068-37-3) is frequently used in agricultural fields and veterinary medicine as an insecticide and acaricide. It is known to contaminate aquatic ecosystems by mixing with surface waters and to accumulate in abiotic matrices. In this study, the effects of fipronil are investigated using freshwater snails. After ex...

Fipronil is widely used against insects in agriculture and ectoparasites in domestic areas and veterinary medicine. However, fipronil may influence non-target species as a result of the contamination of aquatic ecosystems. The present study aimed to investigate the acute and sublethal effects of fipronil in freshwater mussels (Unio delicatus), a no...

Freshwater crayfish are one of the most important aquatic organisms that play a pivotal role in the aquatic food chain as well as serving as bioindicators for the aquatic ecosystem health assessment. Hemocytes, the blood cells of crustaceans, can be considered stress and health indicators in crayfish, and are used to evaluate the health response. T...

Water quality deteriorations in the plumbing are mainly resulted from accumulations and biofilm layer formation on the pipe surfaces. Biofilms may cause significant health risks on human health due to its pathogen content. In this study, biofilm formation on the plumbing, the presence of pathogenic microorganisms in biofilms and their effects on wa...

Highly persistent perfluorooctane sulfonate (PFOS) is an industrial fluorinated organic chemical with significant bioaccumulation and biomagnification properties. The purpose of this study was to determine the toxic effects of sublethal PFOS on the aquatic invertebrate organism, narrow-clawed crayfish [Astacus leptodactylus Eschscholtz, 1823]. The...

In aquatic ecosystems, organisms are in a close relationship with each other. While this relationship is sometimes beneficial for both species, it can sometimes be harmful to one species. This study aimed to investigate the effects of colonized zebra mussels Dreissena polymorpha on the growth parameters and total hemocyte counts of the narrow-clawe...

Increasing activities in the World, enhance the pressure on freshwater resources. The most important solution to reduce this pressure is the use of treated wastewater. The use of wastewater is becoming increasingly common on a global scale. Wastewater used irrigation, especially in agriculture and landscape areas. It can use some industrial activit...

Water resources have been seriously polluted in terms of quality in the last hundred years, especially due to anthropogenic effects. The quality of the water in the storage structures (dam, lake, pond, etc.) has started to deteriorate due to the deterioration in the drainage basin, especially the insufficient feeding. In recent years, researches on...

Fluorene-9-bisphenol (BPFL) is used as an alternative compound for bisphenol A, an endocrine disruptor compound which is present in various materials including plastic bottles and packaging. Although it is used extensively in products that are labelled BPA-free, its effect on wildlife and humans have not been fully studied. Therefore, this study ai...

Objectives Acrylamide, a widely used chemical in industry, clinical laboratory and waste treatment plants, is considered a carcinogen in humans. The present study examined the hormonal, hematologic, and genotoxic responses in the invertebrate model common carp Cyprinus carpio after exposure to sublethal acrylamide. Methods Fish were exposed to acr...

Zinc pyrithione (ZnPT) is one of the components used in antifouling paints and can be an alternative to classical toxic chemicals such as organotin. However, there is still remarkable concern about the environmental safeness of ZnPT due to rapid transchelation and degradation into several metabolites that have their own toxicity. The effect after a...

Bacteria, algae, and fungi are the organisms affected by biocidal substances, which are widely used. Apart from these, they can also have toxic effects on various aquatic organisms. Copper pyrithione (CPT) and zinc pyrithione (ZPT) are used as an alternative to tributyltin, which is forbidden and known to be highly toxic to the aquatic ecosystem. H...

Sublethal effects of low and high molecular weight phthalates were assessed in Unio with a biomarker approach using gills and digestive gland as the main targets of xenobiotic uptake. Diisononyl phthalate, diisodecyl phthalate and dimethyl phthalate were studied for aquatic toxicity to nontarget freshwater mussels. Adult Unio sp. were exposed to su...

Sublethal effects of copper pyrithione (CuPT) on an invertebrate model organism, freshwater mussel (Unio mancus), were assessed using oxidative stress parameters and histopathology. The environmentally relevant concentration of 5 ?g/l copper pyrithione was applied as a 96 h semi-static exposure. MDA levels in digestive gland (DG) significantly incr...

Bisphenol A (BPA) is a high‐production‐volume industrial chemical mainly used in the production of polycarbonates and epoxy resins utilized in the manufacture of containers, bottles, toys, and medical devices. It has systemic effects as an endocrine disruptor even at low doses. To analyze its quantity in biological materials, sensitive and reproduc...

Hemocytes are the main immunologic parameters for invertebrate organisms as a response to diseases and pollutions. This study was aimed to reveal the relations between pollution and the total and differential hemocytes numbers. The gulf of İzmir was selected as location for sampling due to its contaminated by different anthropogenic pollutants main...

Permethrin is belonged to pyrethroids that are one of the substances developed as an alternative to pesticides. Permethrin, which is used especially in agriculture, can bioaccumulate in the water and sediment when mixed into aquatic ecosystems. For this reason, it is necessary to investigate the effect of this substance on aquatic organisms other t...

Environmental pollutants with endocrine-disrupting effect are of global importance due to their contribution to the aethiologies of variety of complex diseases. These lipophilic pollutants are persistent in the environment and able to bioaccummulate in nontarget organisms. BPA, DEHP and PCB118 (dioxin-like PCB) are associated with endocrine disrupt...

Objective Deltamethrin, synthetic pyrethroid, is a suspected endocrine disruptor contaminating ecosystems as toxic pollutant via agricultural activities and vector controls. The objective of the study is to determine the possible effects on human by evaluating antioxidant enzyme levels and total antioxidant status (TAS) of invertebrate model organi...

Zinc pyrithione (ZnPT) and copper pyrithione (CuPT) are widely used antifouling booster biocides in the shipping industry as a replacement for the banned tributyltin (TBT). Sub-lethal effects of zinc pyrithione (ZnPT; 10 μg L⁻¹), copper pyrithione (CuPT; 10 μg L⁻¹) and combined copper–zinc pyrithione (CZPT; 5 + 5 and 10 + 10 μg. L⁻¹) to freshwater...

Imidacloprid (1-(6-chloro-3-pyridylmethyl)-N-nitroimidazolidin-2-ylideneamine (CAS No: 138261–41-3), neonicotinoid insecticide, and agricultural plant protectants were applied as seed and soil treatments. The aim of the present study is to determine the effects of sub-lethal imidacloprid concentrations on the histopathology and oxidative stress par...

In this study, the effect of Mediterranean mussels (Mytilus galloprovincialis) which accumulate contaminants in the marine environment exposed to 20 and 40 µg/Lsublethal zinc pyrithion (ZnPT) at high levels for 48 and 96 hours on total hemocyte counts was determined. Total hemocyte count is a good bioindicator to assess the effects of environmental...

This study aims to compare the growth estimation of narrow-clawed crayfish (Astacus leptodactylus Eschscholtz, 1823) obtained from two methods which are length–weight relations and Artificial Neural Networks (ANNs) from Hirfanlı Dam Lake in 2013 and 2014. The growth estimation of 325 crayfish was carried out with both methods and the obtained resul...

BOOK 50. YIL AUDITORIUM

This study was carried out between January and May 2013 in Mogan Lake (Ankara - Turkey) which is used as fisheries and recreation area. The Vitellogenin (VTG) protein was investigated by the electrophoretic SDS-Page (Sodium Dodecyl Sulfate Polyacrylamide Gel Electrophoresis) method from the blood plasma of female and male members of Cyprinus carpio...

This study aimed to assess genotoxicity in Nile tilapia (Oreochromis niloticus) erythrocytes after exposure to a sub-lethal concentration of 10 mg L-1 di-n-butyl phthalate (DBP) for 24 and 96 h. The results showed that mean MN frequencies in both DBP and ethyl methane-sulfonate (EMS, positive control for MN bioassay) groups were significantly diffe...

2,4-D is a widely used phenoxy herbicide, potentially toxic to humans and biota. The objective of the present study was to reveal short term sublethal effects of 2,4-D on narrow-clawed freshwater crayfish (Astacus leptodactylus Eschscholtz, 1823), based on histology, total haemocyte counts, selected haemolymph parameters, and oxidative stress param...

Phthalates such as di-n-butyl phthalate (DBP) and their esters are widely used plasticizers, their ubiquitous presence in daily life, inevitably leads to their restricted use due to important environmental pollution and health impacts and endocrine disruption potential. The aim of this study was to examine the effects of a sublethal concentration o...

Amaç: Bu çalışmada, 24 ve 96 saat süre ile subletal bakır piritiyona (CuPT) maruz kalan denizel kirliliğin indikatör canlılarından Akdeniz midyelerinin (Mytilus galloprovincialis) total hemosit sayıları incelenmiştir. Yöntem: İzmir İli Foça ilçesinden toplanan Akdeniz Midyeleri (M. galloprovincialis) soğuk ortamda laboratuvara getirilerek bir hafta...

Amaç: Copper pyrithione (CuPT) sucul ekosistemlerde toksik kirletici olan çürüme önleyici boyaların etkisini artırıcı bir biyosidaldır. Bu çalışmada, tatlı sularda model biyoizlem organizması ve istilacı midye türü olan Dreissena polymorpha üzerinde CuPT'nin 48 saatlik akut LC50 değeri saptanmıştır. Yöntem: Dreissena polymorpha bireyleri Kesikköprü...

Amaç: Bu çalışmada, sucul ekosisteme toksik kirletici olarak bulaşan " booster biocide " ve " rinse-off " grubundan koruyucu olarak kullanılan, hatta son zamanlarda biosidal ürünler ve kepeğe-karşı şampuanlar için ruhsat başvurusu bulunan zinc pyrithione'nun (ZPT) Dreissena polymorpha (Zebra midyesi) üzerindeki akut LC50 değerlerinin araştırması am...

Amaç: Bu çalışmada, biyosidal ürünler arasında 21 numaralı ürün tipi olarak yer alan antifouling boyalarda kullanılan aktif maddelerden çinko piritiyonun ülkemiz tatlı sularının doğal kerevit türü olan ve ihracatı yapılan Astacus leptodactylus (Eschscholtz, 1823)'e toksik etkilerinin belirlenmesi amaçlanmıştır. Yöntem: Tatlı su istakozları A. lept...

Phthalates such as di-n-butyl phthalate (DBP) and their esters are widely used plasticizers, their ubiquitous presence in daily life, inevitably leads to their restricted use due to important environmental pollution and health impacts and endocrine disruption potential. The aim of this study was to examine the effects of a sublethal concentration o...

In the present study, the acute and sublethal toxic effects of the synthetic pyhretroid permethrin, a toxic pollutant on aquatic systems from agricultural activities, on narrow clawed crayfish (Astacus leptodactylus) were determined. The acute 96 h LC50 value was estimated as 0.091 (95% CI = 0.5042 ‐2.2734) µg/L. Static bioassay system was used in...

The acute and sublethal effects of etofenprox, a nonester pyrethroid, was determined in narrow-clawed crayfish (Astacus leptodactylus Eschscholtz, 1823). Semistatic bioassay procedures were followed in both experiments, and the 24, 48, 72, and 96 h LC50 values (with 95% confidence limits) of technical etofenprox for crayfish were calculated as 0.68...

Formalin (37–40% formaldehyde) is one of the most effective, widely used chemical in pisciculture for its antiparasitic, antifungal and prophylactic activities. It is used in paints, cleaning products and textile industry, as well. Genotoxic and histological effects of sublethal formalin exposure on Nile tilapia (Oreochromis niloticus) are investig...

Esbiothrin, synthetic pyrethroid with quick activity against insects, is widely used against household pests and in public health. Despite widespread use, data on ecotoxicity and genotoxic effects are extremely scarce. The aim of the present study is to evaluate the genotoxic potential of esbiothrin on a model fish species Cyprinus carpio L., 1758...

The sublethal toxicological and genotoxic potential of propoxur, a widely used carbamate insecticide against household pests, in veterinary medicine, and in public health, was evaluated on carp as a model species (Cyprinus carpio L., 1758) using the erythrocyte micronucleus test. Based on the 96-h lethal concentration, 50% (LC50) data from the U.S....

Aim: The aim of the present study was the determination of antioxidant enzyme levels on different organs of narrow clawed crayfish (Astacus leptodactylus Eschsholtz 1823) after exposure to group of carbamate pesticides, contaminating aquatic ecosystems as toxic pollutant after agricultural activities. Materials and methods: The intermould stage cra...

The aim of this research was to evaluate the acute toxicity of fenitrothion to the crayfish (Astacus leptodactylus Eschscholtz, 1823), which is chosen as an alternative aquatic organism to fish by using the static test system and evaluate the basic lipid peroxidation parameters for the first 24 h. Crayfish of 27.3 ± 0.56 g mean weight and 10.0 ± 0....

The purpose of this study was to evaluate the adverse effects of sublethal doses of fenitrothion, an organophosphothionate insecticide on brain, gill, liver, and muscle tissues as a ratio of 8-OHdG to dG to indicate the DNA damage and erythrocyte micronucleus frequency for genotoxicity of carp (Cyprinus carpio L.) fingerlings. In our study, the mea...

Abstract Esbiothrin (CAS No: 584792) is a synthetic pyrethroid with quick activity against household pest insects. It is also widely used in public health against mosquitoes, houseflies and cockroaches. Despite its widespread use, data on the genotoxic effects of esbiothrin are extremely scarce. Thus, in the present study, we aimed to evaluate th...

Organophosphothionate insecticide fenitrothion is known as potential toxic pollutant contaminating aquatic ecosystems. The effects of fenitrothion were studied to determine the 96h LC50 value on Nile tilapia (Oreochromis niloticus) and investigate histopathological responses of fish exposed to sublethal fenitrothion concentrations. Data obtained fr...

This study measures a whole series of biological endpoints, and histopathological and behavioral changes of carp (Cyprinus carpio L.) fingerlings in order to investigate the adverse effects of a sublethal concentration of 10 microg/L cyfluthrin for 48h and one week using the semi-static test system. The most significantly altered findings of this s...

Deltamethrin, a synthetic pyrethroid insecticide and contaminating aquatic ecosystems, was investigated in the present study for acute toxicity. The aim of this study was to evaluate LC50 values of deltamethrin on Nile tilapia (Oreochromis niloticus L.1758) larvae and fry after acute exposure to deltamethrin. The 48 h LC50 values for Nile tilapia l...

Beta-cypermethrin, a synthetic pyrethroid pesticide and potential toxic pollutant, was investigated in the present study for acute toxicity to Nile tilapia (Oreochromis niloticus L.) fingerlings. The bioassay experiments were repeated three times and the 24-hour LC50 was determined for the Nile tilapia. A static test method of acute toxicity test w...

The effects of exposures to sublethal ammonia concentrations on Nile tilapia (Oreochromis niloticus L.) were determined with respect to histology. The experiments were conducted for six weeks and with four different ammonia concentrations (control, 1, 2, 5, 10 mg l(-1) TA-N). Fish exposed to different ammonia concentrations displayed histopathologi...

ABSTRACT The purpose of this study was to evaluate the effects of fenitrothion, an organophosphothionate insecticide, on selected serum hematological and biochemical parameters of carp (Cyprinus carpio L.) fingerlings and investigate histopathological changes after acute dose of exposure. Among those, cortisol and glucose are evaluated as responses...

The acute 96 h LC50 of (2,4-dichlorophenoxy)acetic acid (2,4-D), a widely used agricultural herbicide, was determined on crayfish (Astacus leptodactylus Esch. 1823). Crayfish of 23.5 ± 1.49 g mean weight and 9.6 ± 0.21 cm mean length were selected for the bioassay experiments. The experiments were repeated three times, in 10 L tap water. The data o...

Deltamethrin, a synthetic pyrethroid contaminating aquatic ecosystems as a potential toxic pollutant, was investigated in the present study for acute toxicity. The purpose of this study was to evaluate LC(50) values of deltamethrin on Nile tilapia (Oreochromis niloticus L.) fingerlings and investigate histopathological responses of fish exposed to...