Yazarlar
- Kocabaş, Mehmet(8)
- Serdar, Osman(7)
- Can, Erkan(5)
- Kizak, Volkan(5)
- Danabas, Durali(4)
- Kutluyer Kocabaş, Filiz(4)
- Ozcan, Ebru Ifakat(4)
- Yildirim, Numan(4)
- Yildirim, Nuran Cikcikoglu(4)
- Özçiçek, Esin(4)
- Başusta, Nuri(3)
- Demirol, Ferhat(3)
- Gündüz, Fatih(3)
- Kocabaş, Filiz Kutluyer(3)
- Kuzgun, Nermin Karaton(3)
- Yilmaz, Ökkeş(3)
- Aksu, Onder(2)
- Alak, Gonca(2)
- Alp, Ahmet(2)
- Altunok, Muhammet(2)
- Ates, Mehmet(2)
- Bastürk, Ozden(2)
- Başusta, Asiye(2)
- Camas, Mustafa(2)
- Danabas, Seval(2)
- Demir, Veysel(2)
- Ergin, Cemil(2)
- Erol, Nida Demirtas(2)
- Erol, Nida Demirtaş(2)
- Kaya, Gulderen Kurt(2)
- Kayim, Murathan(2)
- Kocabas, Mehmet(2)
- Kurt Kaya, Gülderen(2)
- Kutluyer, F.(2)
- Kutluyer, Filiz(2)
- Onal, Ayten Oztufekci(2)
- Tayhan, Nilgun(2)
- Unlu, Erhan(2)
- Uslu, Gulsad(2)
- Yüksel, Fahrettin(2)
Yayınlar
- MakaleAçık Erişim2026Scopus SJRQ2Water extracts of Fucus vesiculosus and Laminaria digitata enhance male reproductive parameters via antioxidant and NO/cGMP mechanisms in rats
Gencoglu, Hasan; Erten, Fusun; Er, Besir; Orhan, Cemal; Acisu, Tutku Can; Sahin, Kazim
Male sexual dysfunction is increasingly prevalent, driving interest in marine algal bioactives as potential natural modulators of reproductive physiology. Brown seaweeds such as Fucus vesiculosus and Laminaria digitata contain phlorotannins, fucoidans, and antioxidant compounds of applied relevance in phycology and biotechnology. This study assessed the effects of standardized water extracts of these two species on reproductive behavior, hormonal status, sperm quality, oxidative balance, and nitric oxide (NO)/cyclic guanosine monophosphate (cGMP) signaling in male Sprague–Dawley rats. Animals received the seaweed extracts orally by gavage (300 mg kg⁻1 day⁻1) for 52 days. Both extracts improved male reproductive behavior by reducing the time required to initiate mounting, intromission, and ejaculation (mount latency, intromission latency, and ejaculation latency), while increasing the number of these sexual behaviors during the test period (p < 0.05). Serum follicle-stimulating hormone and testosterone concentrations increased, alongside higher testicular superoxide dismutase, catalase, and glutathione peroxidase activities and lower malondialdehyde levels. Sperm count and motility improved, particularly with L. digitata extract. Western blot analyses revealed phosphorylated phosphodiesterase-5, endothelial NO synthase, and cGMP levels, with reduced endothelin-1 in testicular and epididymal tissues (p < 0.05–0.001). These findings indicate that extracts of F. vesiculosus and L. digitata, chosen for their well-documented antioxidant and phlorotannin-rich profiles, confer protective and prosexual effects associated with enhanced antioxidant defense and upregulation of NO/cGMP-related pathways, with the L. digitata extract exhibiting comparatively stronger activity.
- MakaleYalnız künye2026Scopus SJRQ3Characteristics of the growth rate, fatty acid profile, and shell content of the freshwater snail Viviparus contectus (Millet, 1813)
Kocabaş, Filiz Kutluyer; Kizak, Volkan; Özçiçek, Esin; Kocabaş, Mehmet; Yilmaz, Ökkeş
Freshwater snails are a nutritious food source, providing vital amino acids, minerals, and protein with low lipid levels. Hence, the adaptation ability, growth rate, fatty acid (FA) profile, and shell content of Viviparus contectus were determined. Biometric measurements were recorded for 6 months. Over the 6-month cultivation period, specific growth rates were recorded as 0.32% · day-1 for shell length and 0.92% · day-1 for body weight. The FA profile of the freshwater snail included a total of 32 compounds with saturated, monounsaturated, and polyunsaturated FAs represented by 13, 10, and 9 types, respectively. Monounsaturated fatty acids (MUFAs) exhibited the highest concentration, followed by saturated fatty acids (SFAs) s at 35.14% and polyunsaturated fatty acids (PUFAs) at 14.57%. Stearic acid (C18:0), erucic acid (C22:1 n-9), and arachidonic acid (C20:4 n-6) were determined as the most abundant FAs within the saturated, monounsaturated, and polyunsaturated FAs classes, respectively. The energy-dispersive X-ray spectroscopy spectra analysis revealed that the shell powder composition consisted of the elements, such as carbon, oxygen, calcium, iron, manganese, and silicium. Overall, V. contectus showed a clear increase in growth over the cultivation period, and future studies are needed to obtain the best culture conditions and intensive production of the species.
- MakaleAçık Erişim2026Scopus SJRQ2A New Product: Determination of Shelf Life of Fish Onion Rings at Freezer Temperature
Kuzgun, Nermin Karaton
The enrichment in terms of fish protein of fast food products is becoming increasingly important day by day. The aim of this study was to determine the shelf life of a new product—fish onion rings—under deep-freezing conditions (−18°C). Minced fish meat (180 g) was combined with minced onion (350 g), water (220 mL), corn flour (50 g), wheat flour (180 g), and salt (20 g), and the mixture was blended with a mixer until a homogeneous texture was obtained. Then, the mixture was shaped into onion rings using a dough-shaping tool (manually). The chemical, sensory, and microbiological quality attributes of the fish onion rings were recorded at 30-day intervals. In the samples, deterioration was observed at the end of the 180th day (as chemical, sensory, and microbiological quality). In the fish onion ring group, the TBA (0.07 ± 0.05–3.02 ± 0.97) and peroxide (0.19 ± 0.18–4.40 ± 0.31) values remained similar during storage. In the microbiological analysis of the experimental fish onion rings, the total viable count (TVC) was 2.63 ± 0.15 on Day 0. Furthermore, the samples underwent sensory evaluation for appearance, odor, and taste. It was determined that the most preferred group was the fish-supplemented group.
- MakaleYalnız künye2026Scopus SJRQ1Determination of microplastic contamination and phthalate ester migration in canned and frozen packaged seafood: A probabilistic human health risk assessment via Monte Carlo simulation
Macit, Arife; Köktürk, Mine; Serdar, Osman; Alak, Gonca
This research was designed to identify the levels of microplastics (MP) and phthalate esters (PAE) in canned and frozen packaged fish and to assess the human health risks associated with these pollutants. Analyses were carried out on a total of 25 sample groups, including 10 different canned tuna samples, 9 different packaged seafood products, and 6 different packaging materials. Microplastics were characterized and polymer identification was performed using μ-Raman and ATR-FTIR spectroscopy, while PAEs were determined by GC–MS/MS. The obtained data were used to calculate estimated daily intake (EDI), hazard index (HI), hazard quotient (HQ), and cancer risk (CR), and uncertainty was assessed using Monte Carlo simulation. The findings revealed that both microplastic and phthalate exposure were higher in the frozen fish group than in canned products. The highest MP concentrations were recorded in packaged Whiting B (0.73 ± 0.25 items/g) and oil-added canned tuna (0.57 ± 0.15 items/g). Regarding PAEs, while DEHP and DBP were generally prominent, significant peak concentrations of BBP and DNOP were also identified, reaching 1.91 ± 0.01 ppm for BBP in canned tuna with sunflower oil and 1.84 ± 0.01 ppm in packaged whiting. Furthermore, higher exposure was observed in males for most PAEs. HQ and HI values were below 1 (maximum HI: 1.57 × 10−2 for males consuming frozen seafood), while CR values remained within an acceptable range (4.74 × 10−7 to 3.49 × 10−6). In conclusion, health risks related to processed fish consumption appear generally low; however, processing and packaging may contribute to contamination and warrant further investigation.
- MakaleAçık Erişim2025New Record of the Melanopsis buccinoidea (Olivier, 1801) from two streams of Mersin (Türkiye) with Evaluation Some Morphometric Parameters
Kocabaş, Mehmet; Kutluyer Kocabaş, Filiz
In this study, some biometric characteristics of the freshwater snail Melanopsis buccinoidea (Olivier, 1801) were determined in Koca Stream and Bayat Stream (Mersin, Türkiye). Weight (W) (g), shell length (SL) (mm), shell width (SW) (mm), aperture length (AL) and width (AW) (mm) measurements were made on the samples taken from different stations. Morphological relationships were determined by multivariate statistical evaluation. The highest values in terms of shell length and weight were determined to be 16.53±3.67 mm and 0.47±0.23 g, living in Koca Stream. The largest shell length measured in the samples was 21.93 mm and the aperture width was 10.62 mm. The results were analyzed using Principal Component Analysis (PCA), a versatile statistical technique employed to explore the relationships between variables and account for a significant portion of the dataset. Samples taken from different stations showed a strong relationship between aperture width and spir height.
AtıfOpenAlex1
İncele - MakaleAçık Erişim2025Zebra Midyesinin (Dreissena polymorpha) Yağ Asidi Profili Ve Yağ Asidine Bağlı Besinsel Kalite Indekslerinin Değerlendirilmesi
Erol, Nida Demirtaş
Esansiyel omega-3 çoklu doymamış yağ asitleri (n-3 PUFA'lar) insan sağlığı için hayati öneme sahiptir ve bir dizi rahatsızlığı önler; midyeler bu PUFA'ların iyi bir kaynağıdır. Bu çalışmanın amacı, yağ asidi bileşimini ve besin kalitesi parametrelerini ölçerek zebra midyesinin (Dressiana polymorpha) fonksiyonel bir gıda olarak potansiyelini değerlendirmektir. Zebra midyesi yağında çözücü ekstraksiyonla lipid miktarı, yağ asidi bileşimi ve besin kalitesi endeksleri belirlendi ve zebra midyesinin nutrasötik ve farmasötik olarak potansiyeli değerlendirildi. Zebra midyesi düşük lipid içeriğine rağmen insan sağlığına faydalı olan yağ asidi profilleri gösterdi. Zebra midyesindeki majör yağ asidi grubu SFA'lar olup bunu MUFA ve PUFA grupları izledi. EPA ve DHA miktarlarının toplamı 14.051.36 olarak bulundu. Ayrıca zebra midyesinin n6/n3 oranı 0.09 olarak bulundu. Zebra midyesinin PUFA/SFA oranı 0.36 olarak bulundu. AI, TI ve HH değerleri sırasıyla 0,60, 0,37 ve 1,09'du. Mevcut çalışma, zebra midyelerinin lipid kalitesini ve yararlı yağ asitlerini işlevsel diyet bileşenleri olarak değerlendirmeye işaret etmektedir.
- MakaleAçık Erişim2025Scopus SJRQ2Farm-Raised Versus Wild Caught Fish: Which is Better?
Can, Erkan; Özçiçek, Esin; Erol, Nida Demirtaş; Austin, Brian
There has been much discussion about which is better, farmed (= aquaculture) or wild-caught fish (= capture-fisheries), with supporters and opponents of both approaches. On balance, aquaculture should be the better option because of the ability to control all aspects of production. The result is that farmed products are often cheaper than wild-caught equivalents. However, there are negative aspects to aquaculture, including habitat destruction, for example the removal of mangroves for the construction of shrimp farms, the effect of escapees on native fish populations, and the possible negative impact of pollution from organic material, pathogens and antimicrobial compounds. The use of wild-caught “trash” fish as a source of protein and oil for the diets of carnivorous fish species in aquaculture is unsustainable. In contrast with wild-caught fish, there is greater variability in supply because of overfishing, quotas imposed by governments, and the effects of adverse weather. Moreover, fishing in distant waters is expensive and hazardous. Certainly, the quality of the product is more difficult to control because the history of the catch is largely unknown. However, there are concerns about illegal fishing activities, and the capture of undersized specimens which impacts negatively on future stocking levels. For the forseeable future, there will be roles for both aquaculture and capture-fisheries to meet the increasing global demand for aquatic food.
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İncele - MakaleYalnız künye2025Scopus SJRQ1Effect of light and noise pollution on oxidative stress and proximate composition in Dreissena polymorpha
Serdar, Osman; Demirtaş Erol, Nida; Aydin, Ayşe Nur
In this study, it was aimed to determine the effect of sound and light pollution on Zebra mussel (Dreissena polymorpha) by biomarker and nutritional composition. For this purpose, an experimental design was carried out in laboratory conditions where the model was exposed to live sound, light, and combined sound + light parameters for 30 min every hour over 96 h. Changes in the biomarkers superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GPx) activities, as well as glutathione (GSH) and thiobarbituric acid (TBARS) levels, were assessed in the model organism exposed to sound, light, and sound + light pollution. The changes in protein and fat amounts were determined. When the changes in biomarkers were examined statistically compared to the control, there was no significant decrease in SOD activity (p < 0.05), a significant increase in CAT activity in sound and sound+light, but a significant decrease in light (p < 0.05), no significant difference in GPx activity (p > 0.05). It was determined that there was a significant increase in GSH and TBARS levels in all three parameters. Significant changes were also observed in the proximate composition. As a result, exposure to sound, light and sound+light pollution caused an increase in oxidative damage and decreases in protein and lipid composition were detected.
AtıfScopus7WoS6OpenAlex8İncele - MakaleYalnız künye2025Scopus SJRQ3New Record of Two Melanopsid Species (Melanopsis costata and Melanopsis buccinoidea) in the Eastern Mediterranean Basin: Morphological Variation in the Söğütlü Stream (Hatay, Türkiye)
Kocabaş, Filiz Kutluyer; Kocabaş, Mehmet
Abstract: Melanopsis costata and Melanopsis buccinoidea are freshwater gastropods within the Melanopsidae family characterized by their wide geographical distribution. The geographical distribution of the two species was evaluated within the Eastern Mediterranean Basin as part of this study. Aquatic sites were surveyed across diverse habitats in Söğütlü Stream (Hatay, Türkiye). The shell characteristics [shell height (SH), shell width (SW), spire height (SpH), aperture length (AL), and aperture width (AW)] of the two species were also examined within the ecosystem. The maximum values recorded for M. costata were a shell length (SL) of 17.40 mm and a weight (W) of 0.62 g. The highest values for M. buccinoidea were 13.75 mm for SL and 0.30 g for W. The PCA analysis demonstrated a significant relationship between shell length and shell width, aperture length, aperture width, and weight. The initial evidence of the presence of M. costata and M. buccinoidea was identified in the water body, and the distribution of both species exhibited habitat-dependent variations in their morphological traits.
- MakaleYalnız künye2025Scopus SJRQ2Hydrocolloid materials of fish bone-derived in edible films: can hydroxyapatite be an alternative approach to improving fillet shelf life?
Alak, Gonca; Kuzgun, Nermin Karaton
The valorization of industrial fish waste has gained significant scientific interest due to its integrated benefits such as waste management and resource recovery. The aim of this study is to evaluate the effectiveness of fish bones, which is one of the wastes of aquaculture processing and constitutes approximately 9–15% of the waste generated as a result of the process, as a preservative in the food industry within the scope of green chemistry applications, sustainability and green product targets. In line with this objective, in the first stage, hydroxyapatite (HAP) was obtained from the fish bones, in the second stage, chitosan (Ch)-based coating solutions were enriched with HAP at different levels (0.02, 0.04 and 0.08 g / L) and in the last stage, fillets were coated with this solution and fillet quality parameters were monitored by microbiological, chemical and sensory analyses at certain intervals (0, 3, 6, 9 and 12 days) during 12 days of storage (at + 4 °C). Based on the data obtained during the storage period, the shelf life of control (Chitosan, Ch). chitosan + low HAP (Ch + L-HAP) and chitosan + medium HAP (Ch + M-HAP) fillet groups increased by 50%, 26% and 20%, respectively, compared to chitosan + high HAP (Ch + H-HAP). In the findings obtained, it was determined that the high concentration application (Ch + H-HAP) had a negative effect on all the parameters studied in fillets, and when the data on the last day of storage, especially the microbiological results were taken into consideration, it was determined that the shelf life decreased by 20–50% on average compared to the other concentrations (Ch + L-HAP and Ch + M-HAP) and Ch group and caused serious negativities in sensory parameters. Based on this result, it would be useful to try low and medium levels of this compound in different combinations. These findings indicate that HAP-enriched chitosan coatings have potential as a promising delivery system for the effective and controlled transport of bioactive ingredients in the food industry.
AtıfScopus5WoS5OpenAlex5İncele - MakaleAçık Erişim2025Scopus SJRQ1MobileNet- and attention-based MLP-Mixer architecture for geographical-region recognition of a marine fish (Perciformes: Carangidae) using otolith images
Dürrani, Ömerhan; İşgüzar, Seda; İmak, Andaç; Ateşşahin, Tuncay; Cömert, Zafer; Dürrani, Syeda Zahra; Türkoğlu, Muammer
Fishery management is crucial to sustain marine ecosystems by preventing overfishing and ensuring a fair distribution of fishing quotas. Accurately identifying the geographical origins of fish stocks is a key challenge in region-specific management strategies. Otoliths, calcified structures found in the heads of all fish species (except sharks and rays), provide insights into the life history and geographical origins of these fish. Traditional otolith analysis is time-consuming and error-prone because of manual inspection. Our study presents a novel approach using deep learning and computer vision to automate the geographical recognition of fish using otolith images. We propose a model that integrates MobileNet, which is known for its efficiency, with an advanced Mlp-Mixer that incorporates an attention mechanism to extract enhanced features. When tested on a diverse dataset of otolith images from five regions, the proposed model achieved a remarkable 96% accuracy, significantly outperforming traditional methods. This high accuracy demonstrates the potential to revolutionise fishery management by providing a fast, reliable, and automated solution for geographical region identification. In conclusion, the proposed method demonstrates the transformative potential of combining MobileNet and an attention-based Mlp-Mixer for automated fish geographic recognition using otolith images. This innovative method addresses the limitations of traditional manual inspection and paves the way for more effective and sustainable fishery management practices.
AtıfScopus4OpenAlex4İncele - MakaleAçık Erişim2025First Record of Dreissena caputlacus (Schütt, 1993) and Dreissena polymorpha gallandi (Locard, 1893) in Çamlıgöze Dam Lake (Sivas, Türkiye) and Evaluation of Some Biometric Parameters; [Çamlıgöze Baraj Gölü'nde (Sivas, Türkiye) Dreissena caputlacus (Schütt, 1993) ve Dreissena polymorpha gallandi (Locard, 1893)'nin İlk Kaydı ve Bazı Biyometrik Parametrelerin Değerlendirilmesi]
Kara, Cemil; Kutluyer Kocabaş, Filiz; Kocabaş, Mehmet; Bozali, Nuri; Gürlek, Mustafa Emre
In this study, the presence and biometric characteristics of Dreissena caputlacus (Schütt, 1993) and Dreissena polymorpha gallandi (Locard, 1893) populations were determined in Çamlıgöze Dam Lake. Shell length (SL), shell height (SH), shell width (SW) data of individuals collected in the study area were used with a digital caliper; The weights of individuals (W) were determined using precision scales. The means of SL, SW, SH and W in D. caputlacus and D. polymorpha gallandi were determined as 22.66±4.33 and 30.03±3.17 mm, 15.88±4.16 and 14.54±1.46 mm; 13.37±2.85 and 14.51±1.41 mm; 94±1.12 and 3.29±0.95 g, respectively. According to principal component analysis, there was a strong relationship between SH, SW, SL and W for both species. For D. caputlacus and D. polymorpha gallandi, 82.283% and 94.502% of the total variance was explained by two principal components. D. caputlacus and D. polymorpha gallandi populations from Çamlıgöze Dam Lake were reported for the first time in this study.
AtıfScopus2OpenAlex1İncele - MakaleAçık Erişim2025Scopus SJRQ1Site Fidelity, Home Range Size and Movement Patterns of a Mega-Fish, Luciobarbus esocinus, in Keban Reservoir, Euphrates River
Alp, Ahmet; Akyüz, Adil; Gündüz, Fatih; Demirol, Ferhat; Çoban, Mehmet Zülfü; Yüksel, Fahrettin; Yerli, Sedat Vahdet
Luciobarbus esocinus (mangar), a critically endangered mega-fish species (≤ 140 kg) endemic to the Euphrates and Tigris river systems, faces severe threats due to habitat fragmentation. To assess its spatial ecology in the Keban Reservoir, 30 individuals were acoustically tagged and monitored for 218–437 days using 18 receivers deployed in the reservoir. The tagged fish exhibited low site fidelity, with station residency indices (RI) ranging from 0.00 to 0.46 and detection periods lasting 59–153 days. Depth and temperature data (115,318 and 112,789 records, respectively) revealed seasonal habitat shifts: individuals occupied deeper waters in winter (mean 10.1 m), shallower depths in spring (4.4 m) and summer (3.8 m), and tolerated temperatures of 7.4°C–28.4°C. Although depth use was weakly correlated with temperature, trends indicated shallower occupancy during warmer periods. Home range analyses showed a maximum linear home range (LHR) of 36.5 km and the areal home range estimated via minimum convex polygon (MCP) was 6422.8 ha. In addition, kernel density (KD) analysis revealed the 95% KD area was 2877.0 ha, the 75% KD area was 67.7 ha and the 50% KD area was 33.8 ha. Seasonal migrations spanned 25–30 km upstream/downstream from release sites, particularly toward tributaries in spring. Around the Keban Reservoir, 14 hydroelectric power plants (HPPs) present and most of these HPP are not designed suitable fish passages. Urgent conservation measures are needed, including Fish Conservation Zones in critical habitats and connectivity restoration via functional fishways, to safeguard this imperilled species in fragmented river-reservoir ecosystems.
- MakaleAçık Erişim2025Scopus SJRQ3Identification and Quantification of Fatty Acid Profile of Muscle and Gametes in Threatened Abant Trout (Salmo abanticus) from Wild
Özçiçek, Esin; Kocabaş, Filiz Kutluyer; Kocabaş, Mehmet; Yilmaz, Ökkeş
Abstract: As an important challenge restricting hatchery production, gamete quality and subsequent larvae and juvenile are influenced by broodstock nutritional status (i.e., protein, essential amino acids, fatty acid profile and minerals). Hence, the fatty acid (FA) profiles of muscle and gametes in threatened Abant trout (Salmo abanticus) from wild was elucidated and quantitated using the gas chromatography. Our results indicated that the saturated fatty acids (SFAs) in muscle and sperm (38.00 and 60.98%) of S. abanticus occurred in higher quantities than unsaturated fatty acids. The egg of S. abanticus in the wild is characterized by high (mostly n-6 HUFA, 33.59%). Tricosanoic acid (C23:0) and docosahexaenoic acid (DHA, C22:6 n-3) were not determined in sperm of S. abanticus. Overall, the current study provides FA composition in the reproduction cells and muscle of mature S. abanticus and the gametes and muscle had similar general FA profiles with the dominance of C18:1 n-9 (Oleic acid), C16:0 (Palmitic acid), C4:0 (Butyric acid), C18:2 n-6 (Linoleic acid, LA) and C20:5 n-3 (Eicosapentaenoic acid, EPA).
- MakaleAçık Erişim2024Cyprinus carpio ile Elde Edilen Surimi Tozundan Üretilen Krakerlerinin Buzdolabı Koşullarında Raf Ömrünün Belirlenmesi
Kuzgun, Nermin Karaton
Bu araştırma, Cyprinus carpio kıyması ile elde edilen surimi tozunun balık krakerlerinin üretimi sonucu buzdolabı koşullarındaki mikrobiyolojik ve kimyasal özelliklerinin belirlenmesini amaçlamıştır. Fileto haline getirilen balıklar kıyma haline getirilip, soğutulmuş su ile iki kez 10 dakika süre ile yıkandı. Üçüncü yıkanma, soğutulmuş %0.3’lük tuz solüsyonu ile 5 dakika karıştırılarak yapılıp ve fazla su süzgeç kullanılarak peynir torbası içinde süzüldü ve daha sonra 60 ±5°C’lik turbo fırında 12 saat kurutuldu ve parçalayıcıda toz haline getirildi. Surimi tozu balık kraker hamuruna eklenip yoğuruldu ve kraker şekli verilip pişirildi. Elde edilen krakerlerin mikrobiyolojik özellikleri incelendi. Elde edilen sonuçlara göre buzdolabı koşullarında 15. günde mikrobiyolojik olarak bozulduğu gözlemlendi. Ayrıca surimi tozunun işlevselliği ile balık türüne ve kullanılan kurutma metoduna bağlı olarak değişim gösterebilir. Konunun daha iyi anlaşılması için Ar-Ge çalışmaları yapılmalıdır.
AtıfOpenAlex2İncele - MakaleYalnız künye2024Scopus SJRQ1Assessment of microplastic contamination in some commercial fishes of the southern Caspian Sea and its potential risks
Gholizadeh, Mohammad; Bagheri, Tahereh; Harsij, Mohammad; Danabas, Durali; Zakeri, Mohammad; Siddique, Mohammad Abdul Momin
This study examined the occurrence of microplastics (MPs) in the gastrointestinal tract (GIT) of 384 fishes classified into four species from 11 sites in 2022 from the southern part of the Caspian Sea. GITs of fishes were collected and digested in H2O2 and KOH at 45 °C for 72 h. After filtration, extracted MPs were observed under a stereomicroscope, and selected MP particles were identified using FTIR. Presence of MPs was 68.98% in the GIT of the investigated fish. The mean abundance of MPs was 5.9 ± 0.9 MPs/GIT in Rutilus kutum, 9.2 ± 1.2 MPs/GIT in Chelon auratus, 3.6 ± 0.7 MPs/GIT in Alosa braschnikowi, and 2.7 ± 0.5 MPs/GIT in Vimba vimba. The predominant form of MPs was fiber (58.21%), followed by fragment (34.77%). Black (34.4%), white (19.07%), and blue (14.58%) were the most frequently detected colors of MPs. Overall, 6 MP polymers were identified, dominantly polypropylene (42.86%), polystyrene (17.86%), and cellophane (14.28%). The western part of the Caspian Sea (mostly tourist spots and urban areas) showed more MP pollution in fish compared to the eastern part. Polymer hazard index (PHI) revealed alarming microplastic contamination in the southern Caspian Sea. The PHI value of the present study showed that PES (PHI = 8403.78) and PS (PHI = 535.80) were “Extreme danger” and “Danger” risk categories, respectively.
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İncele - MakaleAçık Erişim2024Scopus SJRQ3Toxicity assessment of advanced biological wastewater treatment plant effluent by integrated biomarker response in zebra mussels (Dreissenapolymorpha)
Serdar, Osman; Ketenalp, Zozan; Yildirim, Nuran Cikcikoglu
In this study, zebra mussels (Dreissena polymorpha) were exposed to advanced biological wastewater treatment plant effluent (ABWTPE) for 96 h. At the end of the 96th hour, antioxidant parameters such as superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPX), glutathione S-transferase (GST), malondialdehyde (MDA) and glutathione (GSH) were examined. The objective of the study was to identify biomarkers that are useful for assessing the potential toxic effects of ABWTPE in freshwater environments. We observed an increase in GPX, SOD activity and MDA levels, and a decrease in CAT, GST activity and GSH levels. The results obtained in our study showed that the measured biochemical parameters (GSH, MDA, SOD, CAT, GPX and GST) are useful biomarkers in determining the possible toxicity of ABWTPE in aquatic environments.
AtıfScopus3WoS3OpenAlex3İncele - MakaleAçık Erişim2024Scopus SJRQ3VARIATION OF ZOOPLANKTON IN THE HALBORI SPRINGS (TUNCELI, TURKEY)
Bulut, H.; Ozcan, E.I.; Kilmaç, C.
This study examined certain water quality parameters and zooplankton fauna at two stations in Halbori Springs (Tunceli, Turkey), over a 12-month period from June 2022 to May 2023. The highest water temperature of 15.4°C was recorded at Station 2 in August, while the lowest water temperature of 5.0°C was recorded at Station 2 in January. The pH value of Halbori Springs ranged from 6.4 to 8.5. Dissolved oxygen varied between 8.1 and 11.9 mg/L during the study period. A total of 26 zooplankton species were identified in Halbori Springs. Nineteen of these species belong to Rotifera, five Cladocera and two Copepoda. According to the index analysis results of Station 1, the month with the highest species richness index, as measured by the Shannon Wiener H′ index, was October with a value of 1.97, while the lowest value was 0.45 in January. The highest value for the Margalef species diversity D index was 0.78 in October, and the lowest was 0.12 in January. According to the index analysis results of the station 2, the month with the highest species richness index, Shannon Wiener H’, was September with a value of 1.68, while the lowest value was observed in January with 0.67. As for the Margalef species diversity index D, the highest value was recorded in September with 0.64, and the lowest value was observed in January with 0.12. In Halbori Springs, 1 species of Brachionus and 2 species of Trichocerca were found. The QB/T ratio was calculated to be 0.5, suggesting that the study area has oligotrophic characteristics.
AtıfScopus1WoS1İncele - Derleme MakaleAçık Erişim2024Scopus SJRQ1Unraveling the ecotoxicological effects of micro and nano-plastics on aquatic organisms and human health
Naz, Saima; Chatha, Ahmad Manan Mustafa; Khan, Nisar Ahmed; Ullah, Qudrat; Zaman, Faisal; Qadeer, Abdul; Khan, Ibrar Muhammad; Danabas, Durali; Kiran, Azka; Skalickova, Sylvie
Plastic pollution ranks among the most severe environmental disasters caused by humans, generating millions of tonnes of waste annually. The extensive and unregulated use of plastics has led to ecotoxicity and environmental imbalance. Microplastics (MPs) are prevalent in aquatic environments, and these MPs further degrade into even smaller particles known as nano-plastics (NPs). Both MPs and NPs impact the environment by readily absorbing organic pollutants and pathogens from their surroundings, owing to their bigger surface area to volume ratio. This review focuses on the source of origin, bioaccumulation, and potential impact of MPs and NPs on aquatic organisms and human health. Additionally, the review explores various methods employed for identification and quantification of these particles in aquatic ecosystems. Sufficient information is available on their characteristics, distributions, and effects on marine ecosystems compared with freshwater ecosystems. For plastic particles <10 μm, more toxicological effects were observed compared with larger size particles, in aquatic life. Understanding the mechanism of action and ecotoxicological effects of micro/nano-plastics on the health of aquatic life across various trophic levels, as well as human health, is of utmost importance. We address knowledge gaps and provide insights into future research approaches for a better understanding of the interactive mechanisms between binary pollutants.
AtıfScopus36OpenAlex38İncele - MakaleAçık Erişim2023Karakaya Baraj Gölü’nde Yaşayan Arabibarbus grypus (Heckel, 1843) (Şabut) Populasyonunun Bazı Büyüme Özelliklerinin Belirlenmesi
Ozcan, Ebru Ifakat; Şeker, Engin; Cengiz, Burhan
Bu çalışmada; Karakaya Baraj Gölü’ndeki Arabibarbus grypus’un (Heckel, 1843) eşey dağılımı, boy ve ağırlık ilişkisi, yaş tayini, von Bertalanffy büyüme parametreleri ve kondisyon faktörü gibi bazı büyüme özellikleri araştırılmıştır. İncelenen 74 bireyin %37,84’ünün (28 adet) dişi, %62,16’sının (46 adet) erkek olduğu ve dişi/erkek oranının 1/0,6087 olduğu tespit edilmiştir. Örneklerin total boy ve ağırlıkları dişilerde 32,0-62,2 cm ve 354,0-3046 g; erkeklerde 25,0-63,0 cm ve 200,0-3350 g arasında değişmektedir. İncelenen örneklerin yaş grupları II ile VI arasında değişmektedir. Boy-ağırlık ilişkisi dişilerde W = 0,0067L3,079, erkeklerde W = 0,011L2,962 ve tüm bireylerde W = 0,0096L2,993 olarak hesaplanmıştır. Karakaya Baraj Gölü’ndeki A. grypus’un izometrik bir büyüme gösterdiği saptanmıştır (p>0,05). von Bertalanffy büyüme parametreleri dişiler için Lt = 76,53 [1 – e–0,348 (t + 1,22)], erkekler için Lt = 89,83 [1 – e–0,212 (t + 2,08)] ve tüm bireyler için Lt = 92,40 [1 – e–0,200 (t + 2,21)] olarak tahmin edilmiştir. Büyüme performans endeksi (Ф') değeri dişi, erkek ve tüm bireyler için sırasıyla 3,309; 3,233 ve 3,232 olarak hesaplanmıştır. Kondisyon faktörü dişi bireylerde 0,707-1,120 ve erkek bireylerde ise 0,702-1,356 arasında değişmektedir.
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