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Öğe Destinasyon İmaj Başarımının Ziyaretçi Memnuniyeti ve Davranışı Üzerine Etkisi: Çanakkale Örneği(Çanakkale Onsekiz Mart Üniversitesi, 2023) Balyemez Yılmaz, Menije; Mestav, BurcuBu çalışmanın amacı, yerli turistlerin destinasyon imajı başarımını algılama düzeylerini ve bunların ziyaretçi memnuniyeti ve davranışı üzerindeki etkisini ortaya koymayı planladık. Bu sayede destinasyon imajını pozitif olarak geliştirmek isteyen mahalli idareciler ve hedef anakütleye yönelik tutundurma faaliyeti gerçekleştirmek isteyen işletmeler için rehber olmasını amaçladık. Araştırmanın evrenini, Kasım ve Aralık 2022 tarihleri arasında Tarihi Alan’ı ziyaret eden 18 yaş ve üstü yerli ziyaretçiler oluşturmaktadır. Anket sayısı Kolayda Örnekleme yöntemi kullanılarak belirlenmiş olup anket 400 kişiye uygulanmıştır. Çalışmadan elde edilen sonuçlara göre, ankete katılanların büyük bir kısmının destinasyondan genel anlamda memnun olduğu, destinasyon imajı başarımı ile ziyaretçi memnuniyeti arasında yüksek bir ilişki olduğu saptanmıştır. Ayrıca ziyaretçi memnuniyeti ile gelecekteki ziyaretçi davranışı ve destinasyon imajı başarımı ile gelecekteki ziyaretçi davranışı arasında anlamlı ilişki, genç popülasyonun memnuniyet düzeyinin daha fazla olduğu ve destinayon imajı başarımını daha yüksek algıladığı ortaya konmuştur. Şehitliklerin temizliği ve bakımı korunması gerekenler kümesinde yer almışlardır. Bilgilendirme panoları, alandaki yön tabelaları, çöp toplama hizmeti ve çevrenin temizliği ziyaretçiler açısından başarılı bulunmasına rağmen diğer destinasyonlarla yapılan karşılaştırmada performans açısından daha düşük olarak değerlendirilmişlerdir. Bu nedenle bu alanlar üzerinde daha fazla çalışma yapılarak geliştirilmesi gereken konular olarak saptanmışlardır.Öğe A 21-year recovery trend in green turtle nesting activity: 2002-2022(John Wiley and Sons Inc, 2023) Sönmez, Bektaş; Mestav, Burcu; Yalçın Özdilek, ŞükranLong-term monitoring and conservation are crucial for effective protection, since sea turtles migrate cyclically every 2-3 years and lay multiple nests during a breeding season. Therefore, this study aimed to investigate the long-term trend of nesting activities of green turtles over a 21-year period (2002-2022) on Samandag beach.An early morning survey was conducted every year during both nesting and hatching seasons. The trend analyses in nesting activities were performed using Mann-Kendall and Sen's slope tests together with the augmented Dickey-Fuller stationarity test.The nest count and female abundance increased significantly, whereas clutch size, fecundity, and hatching success tended to decrease insignificantly. The percentage change between the most recent and oldest 3-year mean nest count and mean female abundance, which is performed to comply with the Red List assessment method used by the International Union for Conservation of Nature Marine Turtle Specialist Group, was 769% and 764% respectively.Samandag nesting population accounts for one-third of the Mediterranean's total nest count and one-fourth of its total female abundance. The decrease in clutch size and fecundity may be due to the recruitment of individuals with smaller body sizes or malnutrition as a result of population growth. There was an increase in the number of dead embryos and a decline in hatching success. This may be explained by density-dependent population regulation as a result of an increase in the number of nests.It may be argued that adherence to a uniform strategy and the maintenance of continuous protection through collaboration with governmental and non-governmental organizations with scientifically rigorous methodology are significant factors contributing to the high recovery.This study emphasizes the necessity of adopting a comprehensive conservation approach encompassing both foraging habitats and the significant role played by the population in Samandag in the proliferation of Mediterranean green turtles.Öğe Evaluation of the role of enzyme activities in the silvering process of European eels (Anguilla anguilla)(Springer, 2023) Ertürk Gürkan, Selin; Mestav, Burcu; Yalçın Özdilek, ŞükranThis study was carried out to determine the relationships between various morphological parameters, body condition data, and digestive and stress enzyme activities due to silvering in European eel (Anguilla anguilla L.) collected from four locations in Turkey. The yellow and silver eels were caught from Asi River, Köyceğiz, Güllük Bay, and Bafa Lake in November–December 2020. Total body length, eye diameter, and pectoral fin length were measured as morphological parameters. In addition, body fat percentage, gonado-somatic index, and Fulton’s condition factor were calculated, and also weight was assayed as body condition data. The variations of α-amylase, lipase, trypsin, and pepsin enzymes, and superoxide dismutase, catalase, and glutathione peroxidase enzyme activities were measured. The results supported the differences of yellow and silver stage samples in terms of both morphological and physiological parameters and also showed that the digestive and stress enzyme activities of the silver and yellow stage samples were significantly different (p ≤ 0.05). We think this study will make a physiological contribution in terms of digestive and stress enzyme levels to better understand and elaborate the silvering stage of eels.Öğe Genomic Prediction Accuracies for Growth and Carcass Traits in a Brangus Heifer Population(MDPI, 2023) Peters, Sunday O.; Kızılkaya, Kadir; Sinecen, Mahmut; Mestav, Burcu; Thiruvenkadan, Aranganoor K.; Thomas, Milton G.The predictive abilities and accuracies of genomic best linear unbiased prediction (GBLUP) and the Bayesian (BayesA, BayesB, BayesC and Lasso) genomic selection (GS) methods for economically important growth (birth, weaning, and yearling weights) and carcass (depth of rib fat, apercent intramuscular fat and longissimus muscle area) traits were characterized by estimating the linkage disequilibrium (LD) structure in Brangus heifers using single nucleotide polymorphisms (SNP) markers. Sharp declines in LD were observed as distance among SNP markers increased. The application of the GBLUP and the Bayesian methods to obtain the GEBV for growth and carcass traits within k-means and random clusters showed that k-means and random clustering had quite similar heritability estimates, but the Bayesian methods resulted in the lower estimates of heritability between 0.06 and 0.21 for growth and carcass traits compared with those between 0.21 and 0.35 from the GBLUP methodologies. Although the prediction ability of the GBLUP and the Bayesian methods were quite similar for growth and carcass traits, the Bayesian methods overestimated the accuracies of GEBV because of the lower estimates of heritability of growth and carcass traits. However, GBLUP resulted in accuracy of GEBV for growth and carcass traits that parallels previous reports.Öğe Dichotomy in morphology of the same genetic lineage of green turtles(British Herpetological Society, 2023) Sönmez, Bektaş; Mestav, Burcu; Kırbeci, Selma; Yalçın Özdilek, ŞükranMorphological studies of marine turtles are important to provide insight into changes in their developmental environment. This study aimed to determine green turtles' Chelonia mydas morphological differences within the same genetic lineage in the eastern Mediterranean MED3 management unit and to find the best conversion equations between carapace size. A total of 106 adult green turtles (curved carapace length [CCL] range 79–105 cm) were measured on the five major nesting beaches of the eastern Mediterranean during 2020 and 2021. Morphological differences were tested with PERMANOVA and the relationship among body sizes was tested by linear regression. In the eastern Mediterranean green turtles, the mean CCL and SCL (straight carapace length) were 88.5 cm and 83.5 cm, respectively. There were no statistically significant differences in any of the examined morphological characteristics of green turtles collected from five nesting beaches. In the clustering analysis, however, it was found that all the turtles fell into two distinct groups: larger (> 95.2 cm) and smaller (< 85.2 cm) turtles. As well, the conversion equations between CCL and SCL showed a high coefficient of determination (R2 = 0.938). We suggest that the conversion equations may be applied to all green turtles belonging to this population and nesting in the eastern Mediterranean.Öğe Body size-related polymorphic foraging strategy in adult green turtles(Elsevier Ltd, 2023) Yalçın Özdilek, Şükran; Sönmez, Bektaş; Mestav, BurcuGreen turtles (Chelonia mydas) are among the prominent migratory and conservation-needing animals. Missing data on the foraging strategy of green turtles limits effective conservation actions in the Eastern Mediterranean. We applied the stable δ13C and δ15N isotope signatures together with body size to evaluate the foraging ecology of green turtles. Five tissue samples were utilized, including keratin, epidermis, red blood cells, plasma, and whole blood. The samples were retrieved from five major breeding areas in Turkey. Significant correlations were observed between curved carapace length and the δ13C and δ15N values of the green turtles in all the breeding populations except for Alata. The bimodal distribution of δ13C and two clusters based on the δ13C and δ15N values indicated a dichotomy concerning the foraging habitats of the green turtles nesting on the Eastern Mediterranean. The body sizes of the females in the first cluster (with depleted values) were significantly larger than the second cluster (with enriched values). The total niche area of the females in the first cluster was larger than that in the second cluster, which may correspond to the generalist/specialist feeding strategy. The present study gives some novel results about the foraging ecology of green turtles in the Mediterranean. For effective and viable conservation actions, further studies are needed to identify the foraging areas of green turtles in the Mediterranean.Öğe Ambient Air Quality and General Health Outcomes in Nigde (Turkey) between 2011 and 2017(Tehran University of Medical Sciences, 2021) Ertan, Kara; Özdilek, Hasan Göksel; Kara, Emine Erman; Balcı, Fatih; Mestav, BurcuBackground: We aimed to provide information for health practitioners and other related people about the association between ambient air quality and adverse health outcomes in the general population of Nigde, a cen-tral Turkish city, within the context of current health data epidemiological evidence. Methods: The present study highlights the connection between health problems and time series of particulate matter (PM10) and sulphur dioxide (SO2) in Nigde, Turkey between 2011 and 2017. Significant morbidity is linked to ambient air pollution, resulting in a significant economic cost to society. Results: We found that the required funds to treat cancers and chronic obstructive pulmonary disease triggered by ambient air pollution in Nigde, exceed 9 million US dollars per year, even when only the city center is taken into account. Conclusion: As Turkish cities grow and urban population density increases, air pollution issues need to be given priority in order to protect the health of the public and support sustainable development for future generations. It is recommended that particulate matter concentration in this urban center should be significantly reduced to minimize health problems.
