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https://hdl.handle.net/20.500.12428/3541

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UNDERSTANDING AND SUPPORTING SPECIAL EDUCATION: EXPERIENCES OF SCHOOL ADMINISTRATORS
(Centro Univ La Salle-Rj, 2024) Çil, Gürkan; Kırat, Emel; Aydın, Sevcan; Güven, Bülent
This study aims to determine school administrators' attitudes toward special education, their level of knowledge, their collaboration experiences, and their in-service training needs. The study group of the research, which was conducted with a case study based on qualitative research methods, consisted of eight school administrators who served in public schools in the academic year of 2022-2023. Five themes were identified by analyzing the data obtained through the interview technique. The results of the study revealed that the school administrators described individuals with special needs as individuals who differ from their peers in certain areas and need special attention and education. The school administrators considered themselves inadequate in the field of special education. In the collaboration theme, they emphasized the significance of family collaboration but indicated that they were not supported as needed. Moreover, the administrators needed in-service trainings and seminars. Consequently, the role of administrators in special education has a direct impact on the education and development of students with special needs. They should have a broad accumulation of knowledge, exhibit strong leadership skills and act with an empathetic approach. In this sense, it is expected that the organization of in-service trainings and seminars will enhance the quality of special education services by improving the knowledge and skills of administrators.
Life in Extreme Conditions: Diet and Condition of the Extremophile Fish Aphanius almiriensis (Teleostei: Cyprinodontiformes) in a Thermal Rheocrene Spring
(Wiley, 2025) Saç, Gülşah; Özuluğ, Oya; Ağdamar, Sevan; İnci, Harun; Yürekli, Özgün Deniz; Özuluğ, Müfit
This study aims to understand the bioecological traits of an extremophile fish, Aphanius almiriensis, in order to explore how it survives and colonizes extreme habitat conditions. To achieve this, the bioecological characteristics-condition, diet, and feeding strategy-of A. almiriensis inhabiting the Tuzla thermal spring, which is characterized by extreme habitat conditions in terms of physicochemical water parameters, were studied. Among the physicochemical parameters measured, salinity and temperature were remarkably high, ranging from 23.7 degrees C (in winter) to 42.7 degrees C (in summer) and from 47.7 ppt (in autumn) to 60.7 ppt (in winter). A total of 248 fish individuals were collected from the thermal spring, and the diet analyzed seasonally consisted of 17 different food items, and their importance values (MI% and IRI%) varied seasonally. According to the F%, IRI%, and MI% values, the population fed mainly on Diatom, Cyanobacteria, and Diptera, resulting in niche breadth with low values ranging from 0.25 to 0.54. The extreme conditions of the thermal spring indicated that the environment was poor in terms of macroinvertebrate diversity (six taxa), and fish showed food selectivity (E) for Chironomidae and Ceratopogonidae in winter, spring, and summer and for Ephydridae in autumn (E > 0; positive selectivity). Seasonally influenced fish condition was represented by high values in summer (K = 1.43 +/- 0.14) and was positively correlated with both water temperature and the increasing importance of the genus Phormidium in its diet. This study provides the first comprehensive insight into the seasonal diet and condition of A. almiriensis, shedding light on its survival strategies in harsh ecological conditions.
School-Assisted Family Communication: A Study on Parent-Child Relationships
(Inst Fed Education, Science & Technology Of Goias, Campus Inhumas, 2024) Kırat, Emel; Akgül, Hanife; Güven, Bülent; Çil, Gürkan; Acar, Gülümser; Güven, Sibel
This study aims to examine parent-child relationships within the context of school-family collaboration. In the study, which was conducted with the case study design-one of the qualitative research methods-the opinions of seven parents of students receiving education in public primary schools in the 2023-2024 academic year were sought. The opinions obtained through focus group interview method were analyzed using descriptive analysis technique. When the findings were analyzed, the effect of positive communication in terms of parent-child communication styles drew attention. It was concluded that the effective approaches followed in the dimensions of effective listening and empathy contribute to children's roles in the communication process. While differences in daily communication routines based on needs were noteworthy, cases, where communication was interrupted, stood out with expressions of responsibility. The results achieved for privacy perceptions for school and family showed that this issue was taken into consideration based on parents, but children differed in terms of their different developmental characteristics. While expressions of approval or question were among the words that children frequently repeated, positive, approach-based communication was one of the important elements that will strengthen this process.
Effects of a Myrrh (Commiphora myrrha) Essential Oil Supplemented Diet on Haemato-Biochemical Parameters, Expression of Tissue-Specific Immune- and Stress-Related Genes, and Resistance of Cyprinus carpio to Aeromonas hydrophila Infection
(Central Fisheries Research Inst, 2025) Acar, Ümit; Yıldırım, Önder; Baba, Esin; Navruz, Fahriye Zemheri; Hacisa, Mustafa; Yılmaz, Sevdan
Plant-based additives or botanicals, have garnered considerable interest in the aquaculture industry for their multifaceted benefits in fish diets. In this study, a 30 days short term feeding experiment was designed to determine the effects of Myrrh (Commiphora myrrha) essential oil on hematological, biochemical parameters and tissue specific mRNA expression responses of common carp (Cyprinus carpio). Fish were experimentally infected with Aeromonas hydrophila and monitored for 20 days after been divided in four groups: a control group without C. myrrha and three experimental groups supplemented with 0.25%, 0.50%, and 1.0% C. myrrha essential oil (CMO 0.25, CMO 0.50, and CMO 1.0, respectively). Results revealed a significant increase in RBC count, hemoglobin, and hematocrit values compared to the control diet. Positive effects of C. myrra supplementation have been observed also in serum biochemistry parameters. mRNA transcripts of il-1 ss, tnf-alpha, il-8, sod, cat, gpx and gst genes significantly increased in spleen and liver tissue of fish fed with C. myrra supplemented diets. After the challenge with Aeromonas hydrophila, the survival rates were 60%, and 83.33%, respectively, suggesting enhanced fish resistance in the CMO 0.50 and CMO 1.0 groups compared to the control. The results suggest the immunomodulatory roles of C. myrrha essential oil.
Evaluating the efficacy of cherry stem extracts against calcium oxalate monohydrate crystallization in kidney stone treatment
(Bulgarska Akademiya na Naukite, 2024) Akyol, E.; Danışman, Merve
Urethritis is one of the oldest known diseases of urinary stone formation. Urinary system stone disease ranks third among urinary diseases after urinary infection and prostate diseases. Calcium oxalate monohydrate (COM) crystals are known to be the main cause of urinary tract and kidney stones. In addition to the fact that surgical methods and drug treatments used in the treatment of kidney stones are painful and costly, the fact that traditionally used herbs are thought to be natural and harmless, has led to an increased interest in herbal medicines in recent years. Dried cherry stems have diuretic properties and can be used in the treatment of kidney stones reported in Iranian Traditional Medicine documents. When infused in hot water, they can be used as an herbal remedy in the treatment of high blood pressure and kidney stone disease. In the light of this information, in this study, the effects of cherry stem extracts as a natural additive on the growth of calcium oxalate monohydrate (COM) crystals, which is of great importance in investigating the crystallization mechanism in terms of biomineralization, was investigated in vitro. Structural characterizations of CaOx crystals were performed by FT-IR analyses, and morphological characterization and morphological changes were investigated by SEM images. The in vitro inhibitory effect of extracts of natural additives on calcium oxalate crystallization was determined by the time course of concentration measured in solution at extract concentrations of 0.5, 1, 5, 10 and 50 mL. Our findings demonstrate that cherry stem extracts significantly inhibit COM crystal growth and promote the formation of calcium oxalate dihydrate (COD) crystals, which are more easily excreted from the body. © 2024 Bulgarian Academy of Sciences, Union of Chemists in Bulgaria.
Trace elements (Al, Cd, Cr, Cu, Fe, Mn, Ni, Pb and Zn) in Mytilus galloprovincialis and Tapes decussatus from Faro and Ganzirri Lakes (Sicily, Italy): Flow cytometry applied for hemocytes analysis
(Elsevier GmbH, 2021) Parrino, Vincenzo; Costa, Gregorio; Giannetto, Alessia; De Marco, Giuseppe; Cammilleri, Gaetano; Acar, Ümit
Background: Trace elements present in sessile molluscs, are important because they are used in human consumption and it has significantly increased in recent years. While their filtering of the water can lead to their build-up of organic and inorganic materials that can be sampled and analyzed, this can also lead to bioaccumulation of harmful substances, such as essential and non-essential elements, that can harm the human health if in taken in high concentrations or for a long period of time. Methods: In the present study, the trace metal content (Al, Cd, Cr, Cu, Fe, Mn, Ni, Pb and Zn) of two sessile crustaceans, 20 Mytilus galloprovincialis (mussel) and 20 Tapes decussatus (clam) in Faro and Ganzirri Lakes (Messina, Sicily, Italy) were analyzed. Haemolymph samples were taken on both molluscs in order to analyze the haemocyte population by flow cytometric analysis. Unpaired t-tests were used to determine significant differences for the essential and non-essential metallic elements concentrations in the lake waters and in the tissues of M. galloprovincialis and T. decussatus and for hemocyte populations R1 (halinocytes) and R2 (granulocytes). Results: The results suggested that that in Faro Lake, the tissue Al, Cr and Pb levels in M. galloprovincialis were higher than those for T. decussatus, in contrast to Mn, Fe, Ni, Cu, Zn and Cd, which were higher in T. decussatus. Unpaired t-tests showed that there were significantly higher proportions of halinocytes in M. galloprovincialis versus T. decussatus for both Faro Lake (41.8 % vs. 24.3 %; P < 0.001) and Ganzirri Lake (43.0 % vs. 22.4 %; P < 0.001). In contrast, while there were significantly higher proportions of granulocytes in Faro Lake (21.2 % vs. 9.1 %; P < 0.001), this difference was not seen for the granulocytes of M. galloprovincialis versus T. decussatus in Ganzirri Lake (9.6 % vs. 13.0 %). Conclusion: This study shows that M. galloprovincialis and T. decussatus can indeed bioaccumulate some of these metal, such that activation of the immune responses is specific to certain cell types. Future research must focus on the balance of trace elements in the consumption of these shellfish, and analyzes with more sophisticated tools can be used to diagnose the increased concentration of trace elements and the quantification of trace metals from shellfish to clams.
Effects of dietary Ferula elaeochytris root powder concentrations on haematology, serum biochemical parameters, spermatozoa parameters, and oxidative status in tissues of males goldfish (Carassius auratus)
(Elsevier B.V., 2021) İnanan, Burak Evren; Acar, Ümit; İnanan, Tülden
This study evaluates the effects of Ferula elaeochytris, a traditional medicinal herb, root powder (FRP) concentrations (0, 0.5‰, 1‰, 0.5% and 1%) on serum biochemical parameters, hematological profiles, oxidative stress conditions in liver, muscle, gonad, testicular and stripped spermatozoa, and also spermatozoa parameters of adult male goldfish (Carassius auratus). To the best of our knowledge, this is the first time that the effects of FRP on these parameters as being associated with its essential oil contents have been determined. Some important bioactive compounds such as such as 14-β-H-Pregna, α-curcumene, limonene have been determined in FRP. Following a 60-day feeding trial, blood samples were taken and then females were introduced to tanks together with changing photoperiod and water temperature for 10 days to promote spermiation. Results showed that RBC, haemoglobin, and haematocrit levels increased in 1‰ of FRP fed fish compared control group (P < 0.05). Also serum total protein and albumin levels in this group slightly increased (P > 0.05). However, blood parameters were negatively affected in 1% of FRP. Spermatozoa parameters dramatically decreased, even spermiation success could not be achieved in some fish in fish fed with 1% of FRP. Also, 1% of FRP in diet induced oxidative stress conditions in the tissues of this group. These conditions in gonad had a different pattern than those in liver in muscle. The results revealed that dietary 1‰ of FRP could be an advantageous additive while FRP at levels of >0.5% in diet was useless for or has deleterious effects on fish health and reproduction. Based on these results, we conclude that a supplement suitable concentration and analysis of major compounds of medicinal herbs which would use should be taken into consideration when planning to use them in fish diets.
A comparative evaluation of hematological and biochemical parameters between the Italian mullet Mugil cephalus (Linnaeus 1758) and the Turkish mullet Chelon auratus (Risso 1810)
(Tubitak Scientific & Technological Research Council Turkey, 2020) Fazio, Francesco; Saoca, Concetta; Acar, Ümit; Tezel, Rifat; Çelik, Murat; Yılmaz, Sevdan; Kesbiç, Osman Sabri; Yiğit, Murat
This study aimed to carry out a comparative evaluation of the hematological profile (erythrocyte count, hemoglobin concentration, hematocrit, and Wintrobe index parameters such as mean corpuscular volume, mean corpuscular hemoglobin, and mean corpuscular hemoglobin concentration), in addition to certain biochemical parameters (aspartate aminotransferase, alanine aminotransferase, alkaline phosphatase, lactate dehydrogenase, scrum total protein, albumin, glucose, total cholesterol, and triglycerides), in the Italian mullet Mugil cephalus (Linnaeus 1758) and the Turkish mullet Chelon auratus (Risso 1810). Accordingly, two groups of fish were used in this study: 30 flathead grey mullets, M. cephalus, caught in Lake Faro, Italy, and 30 golden grey mullets, C. auratus, caught in the estuarine channel system of Keycegiz-Dalyan, Turkey. Statistical evaluations (unpaired t-test) revealed that there were no significant differences in weight or total length values between the two mullet groups. However, the differences between all the evaluated blood parameters (except alanine aminotransferase) between the Italian and the Turkish mullet were significant (P < 0.0001). The present study demonstrated that there were significant hematological and biochemical differences between the Italian (M. cephalus) and the Turkish (C. auratus) mullet. Our findings also contribute to expanding the knowledge on the hematology and biochemistry of two different species of mullet originating from two different habitats. Since the evaluation of blood parameters represents an essential tool in examining the effects of environmental conditions on fish physiology and, consequently, on fish health status, further research in this field is encouraged and would be very useful.
Üniversite Öğrencilerinin Yaş ve Cinsiyete Göre Bel Kalça Oranının İncelenmesi
(Çanakkale Onsekiz Mart Üniversitesi, 2024) Coşkun, Ali; Şahin, Gülşah
Amaç: Bu çalışmada, üniversite öğrencilerinde yaş ve cinsiyete göre bel kalça oranlarının incelenmesini amaçlanmıştır. Yöntem: Çalışmaya Çanakkale’de öğrenim gören yaş ortalaması 20 olan 80 gönüllü (31 kadın, 49 erkek) birey katılmıştır. Çalışmaya katılan bireylerin yaşları alınmış, ağırlık, boy, beden kitle indeksi ve bel kalça oranı verileri biyoelektrik impedans inbody 270 cihazı ile toplanmıştır. Araştırma kapsamında yapılan ölçümlerden elde edilen veriler, korelasyon ve t-testi yapılarak analiz edilmiştir. Bulgular: Kadınların bel kalça oranı ortalaması 0.86±0.05, bki ortalaması 20.69±4.04 kg/m2, ağırlık ortalaması 55±11kg, boy ortalaması 163±5cm olarak tespit edilmiştir. Erkeklerin bel kalça oranı ortalaması 0.84±0.07, BKİ ortalaması 23±5.4kg/m2, ağırlık ortalaması 73±20kg, boy ortalaması 178±6cm olarak tespit edilmiştir. Katılımcıların bel kalça oranı ile yaş arasında bir ilişki tespit edilememiştir. Ayrıca kadın ve erkekler arası bel kalça oranı arasında istatistiksel olarak anlamlı fark görülmemiştir (p>0.05). Sonuç: Sonuç olarak çalışmaya katılan bireylerin bel/kalça oranları ve beden kitle indeksi verileri birbirine yakın bulunmuştur ve Dünya sağlık örgütü verilerine göre sağlık risklerinin orta seviyede oldukları belirlenmiştir.
Development of melatonin-embedded PLGA-PEG6000 nanofiber biomaterial, and investigation of the effects on abdominal adhesion formation
(SAGE Publications Ltd, 2024) Gökçe, Oruç Numan; Aykora, Damla; Danışman, Merve; Demir, Ufuk; Aydeğer, Cemre; Süner, Salih Can; Oral, Ayhan; Karaboğa, İhsan; Uzun, Metehan
Abdominal adhesions are still among the most common postsurgical peritoneal inflammation-related complications. Adhesion-related disorders are still highly costly and prevalent due to advances in surgical techniques, treatment methods, and various drugs. The present study aimed to investigate the effects of Poly (D,L-lactide-co-glycolide) (PLGA)- polyethylene glycol (PEG6000) Nanofiber + Melatonin on the abdominal adhesion model in rats. For this purpose, PLGA-PEG6000 Nanofiber + Melatonin matrix was fabricated and implanted in an experimental abdominal adhesion model in rats. Our study consisted of an in vitro and an in vivo part. The degradation and release profile of the matrix and Melatonin (Mel) embedded matrix was performed in vitro. In vivo, the procedure was carried out with 18 Wistar male rats. Rats were divided into three groups as follows: Sham, Matrix, and Mel + Matrix, respectively. Consequent to degradation and release profiling in vitro, an experimental adhesion model was created and fabricated pure matrix (2 × 2 cm2), and matrix (2 × 2 cm2, 0.25 mg melatonin/per matrix embedded) was applied to injury area in related groups. Intra-abdominal adhesion scores were determined on post-op 21st day, under general anesthesia. Following, cecum, peritoneal tissue, and adhesive bands were harvested. Macroscopic analysis (severity of adhesion formation), Hematoxlyn&Eosin and Masson’s Trichrome staining (for the examination of the levels of infiltration of inflammatory cells, fibrosis, and neovascularization) were performed for the evaluation of the effects of Mel embedded and pure matrix Our results indicated that PLGA-PEG6000 Nanofiber + Melatonin matrix was degraded completely in rats abdominal cavity and significantly reduced adhesion formation compared to other groups macroscopically (p < 0.05). On the other hand, the histopathological analysis indicated that the fabricated matrix reduced inflammatory cell infiltration, fibrosis, and neovascularization levels.
Assessing Some Bio-ecological Metrics Related to the Growth and Diet of Invasive Gambusia holbrooki in Different Habitats (lotic vs. lentic) of an Island Ecosystem (Gokceada, Turkey)
(Pleiades Publishing, 2023) Aǧdamar, Sevan; Sac, G.; Gaygusuz, O.
Abstract: Despite the widespread occurrences of development plasticity in non-native populations, its underlying causes and consequences for species fitness remain unclear. This study aims to assess the potential invasion characteristics of Gambusia holbrooki in different habitats (lotic vs. lentic) of an island ecosystem (Gökçeada, Turkey), by using metrics related to growth and diet. Fish specimens were collected by electrofishing quarterly between September 2019 and July 2020 in Büyük Stream and the shorelines of the Uğurlu Reservoir. The growth metrics of the species were similar in both habitats, showing positive allometry (b > 3) and high condition (K > 2). The vacuity index (VI), showing low values for each habitat (12.7 in lotic vs. 19.3 in lentic), was a mark of high feeding density of the species. Aquatic insects and zooplankton were the main food items in the diet of this invasive fish, and it exhibited generalist feeding habits with specifics depending on the habitats. Because the species fed heavily on Diptera in the lotic habitat and Cladocera in the lentic habitat, niche breadth values were low (0.16–0.22). It was determined that different habitat types did not have an effect on the LWR and condition of G. holbrooki, but changed its feeding strategy. Positive allometric growth and good condition, a comprehensive food range, high levels of feeding density, and high nutritional plasticity can be considered essential parameters in explaining the invasion success of this fish species living in two different habitat types.
Evaluation of metabolic stress status in common carp (Cyprinus carpio) exposed to the fungicide folpet
(Elsevier Inc., 2023) Acar, Ümit; Erden, Yavuz; İnanan, Burak Evren; Kesbiç, Osman Sabri; Yılmaz, Sevdan; Çelik, Ekrem Şanver
Among pesticides, fungicides are the most extensively used ones in agriculture and their effects on fish health and indirectly human health are needed to evaluate. Folpet has been used for over 50 years as a fungicide across the world. The mechanism of action of folpet on non-target aquatic organisms is so poorly understood and there is no available information about potential acute toxicity of folpet and its mechanism of action in non-target aquatic organisms. With this motivation, two successive experiments were set up: first, 96 h-LC50 value of folpet for common carp (Cyprinus carpio) was determined; and second, effects of different sublethal concentrations (0, 0.025, 0.50, 0.1 and 0.15 mg/L) of folpet on hematological serum biochemical blood parameters, DNA damages, expression levels of catalase (CAT), superoxide dismutase (SOD), glutathione peroxidase (GPx), glutathione S-transferase (GST), and cortisol receptor (HSP70) genes were evaluated in this study. It was calculated that 0.199 mg/L of folpet was the 96 h-LC50 value. After the folpet exposure for 14 days, significant decreases in red blood cells, hemoglobin, hematocrit, serum total protein, and GST gene expression levels were observed while serum glucose, liver enzymes activities, and expression levels of CAT, SOD, GPx, HSP70 genes increased. Also, folpet induced a significant genotoxic effect on the blood cells regarding to DNA damages. Consequently, the results have shown the toxic effects of folpet even at the lowest concentration on common carp.
Relationship Between Environmental Factors, Meat Quality and Biochemical Composition Bearded Horse Mussel (Modiolusbarbatus, Linnaeus 1758) Ayvalik Bay, Balikesir- Turkey
(Springer Science and Business Media Deutschland GmbH, 2023) Acarlı, Sefa; Karakoç, Şenay; Vural, Pervin
Consumption of the bivalve and gastropod species from the Mollusca phylum has been increasing recently due to the high quality of their nutrient content compared to the terrestrial species. Especially bivalve species have an important share within the world total aquaculture production amount. The bearded horse mussels, Modiolus barbatus, (Linnaeus 1758) are consumed particularly in Europe. This study has been conducted from April 2016 to March 2017 in Kumru Cove in Ayvalık Bay, Balıkesir (N 39º18’07.6” and E 26º38’01.1”). Environmental conditions such as temperature, salinity, chlorophyll-a, particulate organic matter and particulate inorganic matter were monitored during the sampling period. The meat yield, condition index, shell component index, biochemical composition values were measured and calculated monthly during the study period. The condition index and meat yield values varied by 4.87–10.22 and 17.04 -23.37%, respectively. A negative relationship between protein and carbohydrate and also between carbohydrate and total lipid, and ash and moisture were found in the study (P ≤ 0.05). Temperature fluctuation had effect on salinity, condition index, shell component index, carbohydrate and moisture while seston influenced meat yield (P ≤ 0.05). The morphometric relationship of length/width and length/weight showed a negative allometry, while the isometric relationship was found between length and height.
Monthly variations of protein and amino acid composition of the smooth scallop Flexopecten glaber (Linnaeus 1758) in the Cardak Lagoon (Lapseki-Canakkale)
(Station Biologique de Roscoff, 2021) Vural, Pervin; Acarlı, Sefa
In the present study, the total protein and amino acid composition of smooth scallop (Flexopecten glaber) meat sampled every month for one year was determined in the Çardak Lagoon (Turkey). The lowest protein level in smooth scallop meat (57.41% dry weight, dw) was found in December, whereas the highest protein level was observed in April (67.62% dw). Essential amino acid concentrations ranged from 16.60 to 20.82 g.100 g-1 dw, while non-essential amino acid concentrations ranged from 36.03 to 46.68 g.100 g-1 dw. Among essential amino acids, phenylalanine was dominant. The highest essential amino acid contents were observed in winter and spring, while the highest non-essential amino acid contents were observed in summer and autumn. The differences in monthly essential amino acids and non-essential amino acid values were statistically significant (p < 0.05).
Frame Score, Grazing and Delayed Feedlot Entry Effect on Performance and Economics of Beef Steers from Small- and Large-Framed Cows in an Integrated Crop-Livestock System
(MDPI, 2021) Şentürklü, Songül; Landblom, Douglas; Paisley, Steven; Wachenheim, Cheryl; Maddock, Robert
When selling small-framed steers at weaning, profitability is diminished. The hypothesis is that by using a vertically integrated business model that includes retained ownership, extended grazing, abbreviated feedlot finishing, and selling at slaughter, profitability would increase. Crossbred yearling steers (n = 288) from small size Aberdeen Angus (Lowline) × Red Angus × Angus × Angus cows and moderate to large size Red Angus × Angus × Simmental × Gelbvieh cows calved May−June were randomly assigned (complete randomized design), in a 3 y study, to feedlot control (FLT) and extended grazing (GRZ) frame score treatment groups. Mean frame score for FLT were small frame (SF) 3.82 and large frame (LF) 5.63, and for GRZ, SF: 3.77 and LF: 5.53. Least-square means were utilized to identify levels of effects and to control family-wise error adjusted with Tukey test. The FLT control steers were housed in the feedlot and fed growing diets and subsequently high energy corn-based diets for 218 days. The GRZ steers grazed a sequence of forages (native range, field pea-barley mix, and unharvested corn) for 212 days and then were transferred to the feedlot and fed high energy corn-based finishing diets for 82 days. The SF GRZ steers grew more slowly grazing native range and annual forages compared to GRZ LF steers, but SF steer grazing cost per kg of gain was reduced 7.80%. Grazing steers did not grow to their full genetic potential. Slower growth during grazing allowed LF and SF steers to grow structurally before feedlot entry creating a compensatory feedlot finishing growth response. Overall, grazing steer performance exceeded steer performance of the FLT control treatment and LF grazing steers had the highest rate of gain, and lowest feed cost per kg of gain. The GRZ steer feedlot days on feed were reduced 136 days and total feed intake was reduced resulting in LF and SF grazing steer feed cost reductions of 175.9 and 165.3%, respectively. Extended grazing also resulted in LF and SF grazing steer hot carcass weights to be greater than control LF and SF steers and SF grazing steers had greater dressing percent, and marbling score. Carcass quality grade, meat tenderness, and cooking losses were similar. System net returns were highest for LF (USD 911.58), and SF (USD 866.61) grazing steers. Managerial modification combining retained ownership, extended grazing, and delayed feedlot entry increased profitability and eliminated market bias.
The ichthyofaunal diversity of freshwater ecosystems in Gokceada Island (NW Turkey) under the pressure of nonnative species
(Turkiye Klinikleri, 2021) Ağdamar, Sevan; Saç, Gülşah; Gaygusuz, Özcan; Doğaç, Ersin; Acar, Ümit; Gürsoy Gaygusuz, Çiğdem; Özuluğ, Müfit
Freshwater ecosystems have a greater value for biodiversity per surface area than terrestrial and marine ecosystems. Streams and lakes are notably prone to biodiversity loss, being the greatest threats habitat destructions and nonnative species. The aim of the present study is to assess the fish composition of lotic and lentic water systems of an island ecosystem (Gökçeada Island, Turkey), which is poorly studied, and to highlight the entry routes and possible impacts of translocated fish species in an island ecosystem. The field surveys were conducted in a total of 14 sampling sites (five reservoirs and nine streams) in the inland waters of Gökçeada Island between September 2019 and January 2021. Fish samples were collected by electrofishing (SAMUS 1000; a backpack electro-shocker). A total of eight fish species belonging to six families (Anguillidae, Atherinidae, Cyprinidae, Leuciscidae, Mugilidae, and Poeciliidae) were determined. As a result fish community of the island was mostly composed by the introduced species Carassius gibelio, Gambusia holbrooki and Pseudorasbora parva. This study provides the first detailed information on the distribution of the fish species encountered in the inland waters of Gökçeada Island. Results showed that the fish fauna of the island was predominantly shaped by fish stocking activities.
Pohlia Hedw. and Oleolophozia L.Soderstr., De Roo & Hedd. species new to Turkey and South-West Asia
(Publications scientifiques du Muséum national d'Histoire naturelle, 2021) Erata, Hüseyin; Özen, Öznur; Batan, Nevzat; Alataş, Mevlüt
Pohlia lescuriana (Sull.) Ochi and Oleolophozia perssonii (H.Buch & S.W.Arnell) L.Söderstr., De Roo & Hedd. have been identified as new to Turkey and South-West Asia, following a recent bryological excursion in Giresun province of Turkey. The genus Oleolophozia L.Söderstr., De Roo & Hedd. is also new to Turkey. In this paper, brief descriptions, illustrations, information about geographic distribution, ecology and comparisons with morphologically similar taxa are given. A key to Pohlia Hedw. taxa in Turkey is added.
Epiphytic Bryophyte Communities of Forests Dominated by Alnus glutinosa (L.) Gaertner in Altindere Valley National Park (Trabzon, Turkey)
(Publications scientifiques du Muséum national d'Histoire naturelle, 2021) Alataş, Mevlüt; Batan, Nevzat; Ezer, Tülay; Özdemlr, Turan; Erata, Hüseyin
The epiphytic bryophyte communities of the Altindere Valley (Macka, Trabzon, Turkey) were studied. A total of 59 releves, taken from living tree trunks in different vegetation periods of 2018 and 2020, were analysed according to the Braun-Blanquet methodology, and the releves were also ordinated and classified using the Detrended Correspondence Analysis (DECORANA) and the Two-Way Indicator Species Analysis (TWINSPAN). As a result of the analyses, Alleniella besseri-Leucodontetum immersi as. nov., Plagiomnio undulati-Raduletum lindbergianae typicum and P.-R. leucodontetosum sciuroidis subas. nov. (Neckerion complanatae) were described and characterised as a new epiphytic. Mnietum cuspidati, Homalothecio sericei-Neckeretum besseri and Brachythecietum populei-isothecietosum alopecuroidis were also described as new to Turkey, whereas Brachythecietum populei typicum was recorded for the second time in Turkey.
New national and regional bryophyte records, 67
(Taylor and Francis Ltd., 2021) Ellis L.T.; Alataş M.; Álvaro Alba W.R.; Charry Giraldo A.M.; Amatov V.; Batan N.; Erata, Hüseyin
1. Andreaea blyttii Schimp. Contributor. R. Natcheva Bulgaria. Samokov Region, Rila Mountains, Rila National Park, N slopes of peak Deno, on granite slabs and scree, collected with occasional sporophytes, 42.19709°N, 23.60322°E, 2780 m a.s.l, 17 September 2019, leg./det. R. Natcheva s.n. (SOM 9811-B). This arctic-alpine species has a north Holarctic circumpolar distribution and this is the first report of Andreaea blyttii for SE Europe. It is its southernmost locality and extends its range further south in Europe. The Rila Mountains are the highest in the Balkan peninsula and A. blyttii was found near the highest summit (Mussala, 2925 m a.s.l.). In Bulgaria the genus Andreaea is also represented by A. alpestris (Thed.) Schimp. and A. rupestris Hedw., both of which occur in the Rila Mountains.
Comparison of milt and blood parameters including testosterone and gonadotropins levels of sex-reversed female rainbow trout (Oncorhynchus mykiss) by different steroid hormones
(John Wiley & Sons Ltd, 2021) İnanan, Burak Evren; Acar, Ümit
All-female progeny is preferable in the reproduction of rainbow trout. Using sex-reversed (SR) female rainbow trout by steroid hormones as broodstock in the reproduction is the most appropriate way to all-female progeny. This study compared mature SR female rainbow trout by ethisterone (ET), 11β-Hydroxyandrostenedione (HD) and 17α-Methyltestosterone (MT) in terms of spermatological parameters and health status, for the first time. Spermatozoa concentration, motility characteristics, seminal plasma pH, testosterone and gonadotropins in seminal plasma and blood serum, blood parameters of SR females were evaluated, comparing with testicular and stripped milt, and blood from normal males (NM). The SR females by HD had greater gonadosomatic index and better motility characteristics compared with other groups. Also, blood parameters of this group were more similar to those in NM. The SR females by ET had the lowest haematocrit and the highest glucose and activities of the enzymes compared with the other groups. The measured hormones were significantly the lowest in both seminal plasma and serum of the ET group. These findings suggested that using of HD for obtaining SR female should be preferred due to having the better quality spermatozoa and health status.

Güncel Gönderiler