Sürdürülebilir Kalkınma Amaçları

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• MakaleAçık Erişim2026Scopus SJRQ3/r/munzur/1356
  Changes in common carp (Cyprinus carpio) sperm quality and membrane lipid composition related to cryopreservation by Tribulus terrestris; [Alterações na qualidade do esperma e na composição lipídica da membrana da carpa comum (Cyprinus carpio) relacionadas à criopreservação por Tribulus terrestris]

  Ölçülü, Abdullatif; Özçiçek, Esin; Kocabaş, Filiz Kutluyer; Kocabaş, Mehmet; Kızak, Volkan; Yilmaz, Ökkeş

  Docosahexaenoic acid (DHA) was the major polyunsaturated fatty acid (PUFA) in the sperm plasma membrane, and the levels of PUFAs decreased in treated groups during the cryopreservation process. The supplementation of TT (Tribulus terrestris) to Cyprinus carpio sperm at 200 µg∙L-1 positively affected the maintenance of motility parameters and FAs levels after the freeze-thaw cycle, and TT can be used as an herbal medicine instead of synthetic pharmaceuticals to improve the productive performance in aquaculture.

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  İncele
• MakaleYayıncıda açık erişim2025Scopus SJRQ2/r/munzur/2267
  Determination of Toxic Effects of Copper in Navicula cryptocephala var. veneta by Biomarkers and Bioaccumulation Quantification

  Aydın, Ayşe Nur; Serdar, Osman; Ölçülü, Abdüllatif; Çimen, Işıl Canan Çiçek; Ak, Tuba Parlak; Derman, Taner; Sevim, Ayşegül; Yıldırım, Nuran Cikcikoğlu

  As a result of the increased use of metals such as copper (Cu), copper pollution in the environment is also increasing. In order to investigate the effect of copper mixed into the water environment and on aquatic biota, the microalga Navicula cryptocephala var. veneta was chosen as a model organism. N. cryptocephala var. veneta it was aimed to determine the accumulation and elimination amounts and some biomarker responses. Metal accumulation amounts in the organisms used in the study. The amount of metal accumulated in relation to the wet weight mass of the samples was determined using Atomic Absorption Spectophotometry (AAS) mass spectrometry. In the bioassays conducted within the scope of the study, lipid peroxidation (TBARS) and reduced glutathione (GSH) levels, superoxide dismutase (SOD) enzyme activity, glutathione peroxidase (GSH-Px) enzyme activity and catalase (CAT) enzyme activity were determined with an ELISA microplate reader at 24, 48, 72, 96 and 120 hours. According to the study data, it was observed that Cu metal accumulated in Navicula cryptocephala var. veneta and caused oxidative stress in the organism, affecting the organism by causing changes in TBARS, GSH levels and antioxidant enzymes SOD, CAT and GPx activities. Additionally, it was observed that different elimination levels occurred in the application groups.

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  AtıfScopus1·OpenAlex1

  İncele
• MakaleAçık Erişim2025Scopus SJRQ1/r/munzur/1475
  Effect of Ferula sp. on sperm cryotolerance, quality, and fatty acid composition in common carp (Cyprinus carpio)

  Ölçülü, Abdullatif; Özçiçek, Esin; Kutluyer Kocabaş, Filiz; Kızak, Volkan; Kocabaş, Mehmet; Yılmaz, Ökkeş

  Ferula sp. is a perennial herbaceous plant and is used in traditional medicine owing to their antimicrobial, antiviral, aphrodisiac and spermatogenic activities in the world. Hence, Ferula sp. was used in the present study for cryopreservation protocol as a herbal supplement. The impact of different concentrations [0 mM (Control), 30 µg L−1, 60 µg L−1, 90 µg L−1] of Ferula sp. extract on the quality and fatty acid (FAs) composition was assessed in fresh and cryopreserved sperm of Cyprinus carpio. Optimal supplementation of Ferula sp. at a concentration of 60 µg L−1 in the freezing extender significantly improved post-thawed sperm quality of C. carpio. Sperm motility parameters were assessed using the sperm class analyzer system. The fatty acid (FAs) content in sperm was analyzed using gas chromatography. The results revealed that the increases in motility rate (80.0 ± 3.54%) at 60 µg L−1 were increased significantly (p < 0.05). Significant differences in sperm parameters [(VCL: curvilinear velocity, VSL: straight line velocity, VAP: average path velocity, and BCF: beat cross frequency)] were observed between the different treatments (p < 0.05). The Monounsaturated fatty acids (MUFAs) showed a slight increase in comparison to fresh spermatozoa during cryopreservation. DHA (Docosahexaenoic acid), LA (Linoleic acid) and ARA (Arachidonic acid) were identified as the major PUFAs (polyunsaturated fatty acid) in the sperm plasma membrane, and however the total PUFAs reduced all treated compared to fresh sperm samples after post-thawing. Overall, the supplementation with Ferula sp. to extender at a concentration of 60 µg L−1 positively influenced the motility parameters and FAs levels during cryopreservation and, Ferula sp. may act as a promising protective substance for the conservation of valuable fish genetic resources.

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  AtıfScopus1

  İncele
• MakaleAçık Erişim2025Scopus SJRQ2/r/munzur/1451
  Determination of the Effect of Nanoparticle Copper on Navicula cryptocephala var. veneta by Biomarkers and Bioaccumulation Amounts

  Serdar, Osman; Aydın, Ayşe Nur; Ölçülü, Abdüllatif; Çiçek Çimen, Işıl Canan; Parlak Ak, Tuba; Derman, Taner; Pala, Ayşegül; Yıldırım, Nuran Cikcikoğlu

  Pollutants such as copper nanoparticles (CuNP), which form residues in the environment, especially in water environments, cause serious damage to the environment and the organisms living in the environment. In this study, Navicula cryptocephala var. veneta was selected as a model organism. The EC50 values of CuNP on Navicula cryptocephala var. veneta were determined as 4.94 mg\L and 3 different application concentrations were determined considering this ratio. The experiments were carried out in 3 replicates and samples were taken at 24 and 96 hours. At the end of 120 hours, samples were taken to determine the elimination values. CuNP accumulation amounts in the samples were measured by electrothermal atomic absorption spectrophotometer (ETAAS). For biomarker analysis, thiobarbituric acid (TBARS) and glutathione (GSH) levels and superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GPx) activities were performed using CAYMAN ELISA kit. According to the study data, as CuNP concentration and application time increased, the amount of accumulation in Navicula cryptocephala also increased. Increasing-decreasing changes were observed in elimination. CuNP caused oxidative stress in N. cryptocephala and caused changes in TBARS and GSH levels. In addition, it caused increases in SOD activities and statistically significant decreases (P<0.05) in CAT and GPx activities.

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  AtıfScopus2·WoS1

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• MakaleYalnız künye2025Scopus SJRQ4/r/munzur/855
  First Record of Black Sea Trout (Salmo labrax) and Its Potential Hybrids with Endemic Munzur Trout (Salmo munzuricus) in Uzunçayır Dam Lake, Tunceli

  Ölçülü, Abdullatif; Düzgüneş, Zehra Duygu; Kocabaş, Filiz Kutluyer; Kızak, Volkan; Kocabaş, Mehmet

  The depletion of unique genetic resources and increased risk of extinction may result from hybridization between native and introduced species. In the present study, morphological and molecular analysis were performed on two putative natural interspecific hybrids of the genus Salmo and their parent species, Salmo labrax and Salmo munzuricus, collected from Uzunçayır Dam Lake, which is fed by Munzur and Pülümür streams. Molecular analyses revealed the presence of S. labrax in Uzunçayır Dam Lake for the first time. Phylogenetic analysis using the cytochrome b (Cytb) gene of mitochondrial DNA to determine the maternal origin revealed that hybrid individuals belonged to the same clades as S. labrax or S. munzuricus. Recombination activating gene 1 (Rag1) sequence of nuclear DNA was analyzed for paternal analysis and it was determined that hybrid individuals carried similar single nucleotide polymorphisms (SNPs) to S. labrax or S. munzuricus. These findings support that individuals derive from different parental species. Therefore, evidence from trout samples assumed to be natural hybrids in this study suggests interspecific hybridization between S. labrax and S. munzuricus, but further studies are required. Rag1 Phenotype

  İncele
• MakaleYalnız künye2022/r/munzur/5844
  Enhancing motility of rainbow trout (Oncorhynchus mykiss) sperm by Tribulus terrestris extract supplementation

  Kocabaş, Mehmet; Kutluyer Kocabaş, Filiz; Aksu, Önder; Karakavuk, Emrah; Ölçülü, Abdullatif; Ince, Olcay Kaplan

  Tribulus terrestris (TT) is a famous traditional plant of family Zygophyllaceae and widely distributes around the world. TT has potential to elevate the testosterone, testosterone precursor and luteinizing hormone levels. In this study, trials were conducted to assessment the impact of Tribulus terrestris addition on sperm motility of rainbow trout (Oncorhynchus mykiss) for the first time. In the trial, we used to different concentrations [0 µg L-1 (Control), 200 µg L-1, 400 µg L-1, 600 µg L-1, 800 µg L-1 and 1000 µg L-1] of T. terrestris extract. Sperm motility characteristics and longevity were determined. In addition, protodioscin content of T. terrestris extract was assessed. The present study revealed that the presence of T. terrestris caused to increase in sperm motility. The increases in duration (49.00±3.61 s) and motility rate (91.67±2.89%) at 400 µg L-1 were statistically significant (p&lt;0.05). Overall, addition of T. terrestris to activation solution can increase the sperm motility of rainbow trout.

  İncele
• MakaleAçık Erişim2019/r/munzur/5055
  Üç Farklı Sıcaklığa Alıştırılan Türk Kereviti (Astacus leptodactylus)’nin Sıcaklık Toleransı

  Kumlu, Metin; Eroldoğan, O. Tufan; Ölçülü, Abdullatif; Yilmaz, Hatice Asuman

  15, 20 ve 25 °C’ye alıştırılan Türk kereviti için kritik termal maksima (CTMax) ve minima (CTMin) değerleri belirlenmiştir. CTMin ve CTMax değerleri sırasıyla 1,3, 1,1 ve 2,0 ile 37,4, 37,5 ve 38,7 °C’dir. Sıcaklık tolerans testleri alıştırma sıcaklıklarının (15, 20 ve 25 °C) A. leptodactylus CTMin değerlerine önemli etkilerde bulunduklarını göstermiştir (P≤0,05). Sıcaklık tolerans alanı CTMin ve CTMax sınırları ile değerlendirilerek 364°C2 olarak hesaplanmıştır. Genel olarak 15 ile 25 C arası alıştırma sıcaklıklarında, alıştırma tepki oranı (ARR) 0,07 ile 0,13 olarak hesaplananmıştır. Kerevitlerin tamamı 0,5 °C’de kıvrılma ve geneli 32,0- 33,0°C’de kasılma göstermiştir. Akdeniz bölgesinin güneydoğu kesiminde A. leptodactylus yetiştiriciliği sıcaklık toleransı açısından uygun olabilir.

  AtıfOpenAlex5

  İncele
• MakaleAçık Erişim2012Scopus SJRQ3/r/munzur/4447
  Potential of Cottonseed Oil as Fish Oil Replacer in European Sea Bass Feed Formulation

  Eroldogan, Tufan; Turchini, Giovanni M.; Yilmaz, Asuman H.; Tasbozan, Oguz; Engin, Kenan; Ölçülü, Abdullatif; Özsahinoglu, Ilgin; Mumogullarinda, Pinar

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  AtıfOpenAlex28

  İncele
• MakaleYalnız künye2012Scopus SJRQ2/r/munzur/4643
  Compensatory growth response of European sea bass (Dicentrarchus labrax L.) under cycled starvation and restricted feeding rate

  Türkmen, Serhat; Eroldogan, Orhan Tufan; Yilmaz, Hatice Asuman; Ölçülü, Abdullatif; Inan, Gul Ayten Kiris; Erçen, Zeynep; Tekelioglu, Nazmi

  The compensatory growth response of the European sea bass (Dicentrarchus labrax) that faced cycling starvation and restricted ration was assessed. Juveniles (10.5g) were stocked into 15 tanks at a density of 25 fish per tank. Five different feeding regimes were tested on triplicate groups of fish: CSatiation: control fed for 60days without deprivation, CRestricted: 25% restricted feeding, S-R: 1day starvation then 4days CRestricted feeding, R-F: 1day CRestricted feeding then 4days CSatiation feeding, and, finally, S-F: 1day starvation then 4days CSatiation feeding. The specific growth rate of fish in the CSatiation (2.5 +/- 0.06%day-1), S-F (2.5 +/- 0.11%day-1) and R-F (2.4 +/- 0.18%day-1) were significantly higher than that of CRestricted (2.2 +/- 0.05%day-1) or S-R (2.0 +/- 0.01%day-1). Fish in S-F group were able to achieve catching up with the CSatiation. There was no significant difference in feed conversion rates but R-F and S-F consumed approximately 34% more feed than CSatiation following the first re-feeding day. Although, the highest lipid content was observed in CSatiation (14.4%), S-R (33.3% dry matter) had the highest water content compared with the CSatiation and CRestricted (37.8% and 36.9% dry matter respectively). In conclusion, it may be concluded that sea bass has rapid response to cycling starvation/re-feeding and that a 25% restricted feeding ratio is insufficient to invoke a compensatory growth response in sea bass.

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  AtıfWoS24·OpenAlex24

  İncele
• MakaleYalnız künye2012Scopus SJRQ3/r/munzur/5624
  Avrupa deniz levreği yem formulasyonunda pamuk tohumu yağının potansiyel olarak balık yağına ikamesi

  Engin, Kenan; Taşbozan, Oğuz; Turchini, M. Giovanni; Eroldoğan, Tufan; Özşahinoğlu, Ilgın; Ölçülü, Abdullatif; Yilmaz, Hatice Asuman; Mumoğullarında, Pınar

  Triplicate groups of 20 European sea bass (35 g) were fed five diets in which the added lipid was 100% fish oil (FO), 40% (CSO40), 60% (CSO60), 80% (CSO80) and 100% (CSO100) refined cottonseed oil (CSO), for a period of 120 days. Overall fish growth, feed conversion ratio and protein utilization were unaffected by dietary treatment, but hepatosomatic and visceral fat indexes increased with increasing dietary CSO. Fillet fatty acid composition of total lipids reflected the fatty acids in the test diets. The monounsaturated fatty acids were significantly higher in fillet of fish fed diet FO, CSO40 and CSO60 compared to other treatments while saturated and polyunsaturated fatty acids (PUFA) were not affected by the dietary treatment. Some fatty acids (18:0, 18:1n-9, 20:5n-3 and 22:6n-3) were present in higher concentration in fillet lipid than in the CSO100 dietary lipid indicating accumulation in fillet relative to test diets. Retention of n-3 LC-PUFA within the fillet was increasingly inefficient among fish fed increasing levels of FO. Thus, this study suggests that CSO can be considered as a relatively effective substitute for fish oil in European sea bass (35 g) in terms of growth performances and feed efficiency as far as fish meal is present in the diet.

  AtıfTR Dizin5

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