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    Comparison of fatty acids and some mineral matter profiles of wild and farmed snails, Cornu aspersum Muller, 1774
    (Taylor & Francis Ltd, 2019) Celik, Meryem Yesim; Duman, Mehmet Bedrettin; Sariipek, Merve; Goren, Gulsen Uzun; Ozturk, Dilara Kaya; Kocatepe, Demet; Karayucel, Sedat
    The fatty acid and mineral matter compositions of the visceral mass and pedal mass of wild and farmed Cornu aspersum were compared. The relative fatty acid amounts of the visceral and pedal masses of wild and farmed snails are: polyunsaturated fatty acid (PUFA) > saturated fatty acid (SFA) > monounsaturated fatty acid (MUFA), PUFA>SFA>MUFA, MUFA>PUFA>SFA and PUFA>MUFA>SFA, respectively. Wild snails had a higher concentration of iron and zinc than farmed snails. Selenium was 2.82 times higher in the pedal mass of farmed snails than the pedal mass of wild snails. Ca:P ratios in the visceral mass of wild snails, visceral mass and pedal mass of farmed snails were 1.76:1, 1.12:1 and 3.87:1 respectively. Both wild and farmed snails have high contents of oleic, linoleic, eicosapentaenoic and docosahexaenoic fatty acids and are a good source of minerals. Careful attention should be paid, however, as to which diet will be used during farming because the composition of fatty acid in the snail is affected by diet.
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    Comparison of Proximate and Amino Acid Composition between Farmed and Wild Land Snails (Cornu aspersum Muller, 1774)
    (Taylor & Francis Inc, 2020) Celik, Meryem Yesim; Duman, Mehmet Bedrettin; Sariipek, Merve; Goren, Gulsen Uzun; Ozturk, Dilara Kaya; Kocatepe, Demet; Karayucel, Sedat
    The proximate and amino acid compositions of the visceral mass and pedal mass of wild and farmed land snail Cornu aspersum were compared. The lipid in all body parts of farmed snail was significantly higher than all body parts of wild snail. The ash content of wild snail pedal mass was higher than all body parts of farmed snails. The dominant amino acid was glutamic acid (Glu), while the highest values of essential amino acids were leucine (Leu) and arginine (Arg) in all body parts of all snails. Sulfur amino acid was the lowest value in C. aspersum, which indicated that methionine (Met) and cysteine (Cys) could have been the first limiting amino acids. The study results showed that the protein efficiency rate (PER) of C. aspersum is close to PER of egg, which indicates a high protein quality and high biological value of land snails. The study also demonstrated that the experimental diet had good acceptability and well-balanced essential amino acid content, meaning that the farmed snails could have almost the same protein characterization as wild snails. Thus, all body parts of both wild and farmed C. aspersum have high protein quality.
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    Cornu aspersum (Müller 1774) ve Helix lucorum (Linnaeus 1758) Türü Kara Salyangozlarinin Biyokimyasal Kompozisyonu
    (Tokat Gaziosmanpasa University, 2019) Duman, Mehmet Bedrettin; Çelik, M. Yesim
    Çalismada, Helix lucorum ve Cornu aspersum (sinonim: Helix aspersa) türü karasalyangozlarinin yenilebilir et kisminin (ayak+bas) biyokimyasal kompozisyonu degerlendirilmistir.Bir yillik çalisma süresince kuru madde üzerinden elde edilen verilere göre H. lucorum’da ortalama protein,karbonhidrat, kuru madde, kül ve yag sirasiyla %65.08±1.40, %15.56±1.69,%17.30±0.53, %15.53±0.48 ve %3.84±0.45 olarak tespit edilirken C. aspersum türünde sirasiyla%62.70±1.72, %21.44±12.05, %16.21±0.64, %11.92±0.33 ve %3.93±0.34 olarakbulunmustur. Arastirma sonuçlari, her iki tür kara salyangozunun biyokimyasalparametrelerindeki degisimlerin gonadal gelisim, beslenme ve uyku dönemlerindenetkilendigini göstermistir. Protein ve yagin yumurta olusumunda kullanilan baslicakimyasal içerik oldugu tespit edilmistir. Ayrica elde edilen bulgular, karasalyangozlarinin yüksek protein ve düsük yag orani ile ideal bir hayvansalbesin olarak degerlendirilebilecegini ortaya koymaktadir.
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    Determination of growth and survival rate of juvenile snail Helix lucorum Linnaeus, 1758 (Gastropoda, Helicidae)
    (BIOFLUX SRL, 2015) Çelik, M. Yeşim; Duman, Mehmet Bedrettin; Sariipek, Merve; Uzun, Gülşen; Karayücel, Sedat
    In this research, the growth and survival rate of juvenile Helix lucorum was determined during the eight weeks. Coefficient variation (CV) in assessing variability of shell height and live weigth was investigated. One week old juvenile snails with a mean shell height of 6.73±0.03 mm and a mean weight of 0.10±0.01 g were stocked to the three rearing boxes with a density of 13 snails per group at the start of the experiment. At the beginning of the study, the variability of shell height and live weight showed relatively little difference as 9.71% and 28.16% but this gradually increased towards the end of the study. The final variation of shell height and live weight was calculated 20.32% and 59.84%, respectively. At the end of the study, cumulative survival rate was found 97.74%. In conclusion, snails showed high survival rate with high size variation in the study. Initial stocking density is optimal for rearing juvenile H. lucorum but after four weeks, stocking density should be decreased and thereby lower size variation and more similar growth pattern might be provided. © 2015, BIOFLUX SRL. All rights reserved.
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    Effect of shell height on the reproductive success and survival of cornu aspersum (O. F. Müller, 1774)
    (BIOFLUX SRL, 2018) Çelίk, M. Yeşim; Duman, Mehmet Bedrettin; Sariίpek, Merve; Gören, Gülşen Uzun; Öztürk, Dilara Kaya; Karayücel, Sedat
    The study was carried on Cornu aspersum (synonym: Helix aspersa) in the Black Sea region, Turkey. The snails were placed in two separate treatments called G1 (28.00-33.99 mm) and G2 (34.00-39.99 mm) at the artificial hatchery. Mean shell height and live weight were 32.22±0.06 mm and 8.96±0.07 g in G1; 35.40±0.06 mm and 11.76±0.09 g in G2, respectively. The spawning rate in G1 was lower than G2 (p ≤ 0.05). The survival rate was 78.18% in G1 and 81.14 % in G2 after spawning; 86.63% in G1 and 94.12% in G2 after hibernation, respectively. The mean egg weight was 0.04 g in G1 and 0.05 g in G2 while the shell height and live weight of juvenile were 5.56±0.05 mm and 0.06g in G1; 5.81±0.07 mm and 0.07 g in G2, respectively. The results showed that larger eggs were laid by bigger size adults and after hatching bigger size juveniles were obtained due to larger egg diameter. In addition, the results of experiment confirmed the hypothesis suggested about survival that newly matured individuals could have insufficient energy reserves while larger ones can not withstand the excess energy for reproduction. Thus, the body size of C. aspersum is correlated with reproductive performance and survival rate. © 2018, BIOFLUX SRL. All rights reserved.
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    Growth and Mortality Rates of Cornu aspersum: Organic Snail Culture System, Black Sea Region
    (Galenos Publ House, 2019) Celik, Meryem Yesim; Duman, Mehmet Bedrettin; Sariipek, Merve; Uzun Goren, Gulsen; Kaya Ozturk, Dilara; Karayucel, Sedat
    The study was aimed to examine a snail organic culture system and describe the cultivation properties of Cornu aspersum. The environmental parameters of the culture system and their effects on the growth and mortality rates of C. aspersum were determined between November 2014-October 2015. Snails were fed Spinacia sp. (spinach), Urtica sp. (nettles), Brassica oleracea sp (cabbage) and formulated diet. The feeding and growth rates increased with increasing temperature. Shell height growth rate was the highest in spring while the live weight growth rate was the highest in summer. Mortality rate of the baby snail was higher between November 2014 and May 2015 due to stress conditions such as handling and varying temperatures during their first stages of life. High mortality observed in adults could be associated with the spawning activity of the matured snails that caused physiological exhaustion. The result showed that the best culture cycle for C. aspersum was from spring to autumn in Black Sea region and in order to prevent postreproductive mortality, snails reached to marketable size should be harvested.
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    Karadeniz Bölgesi Sinop İlinde Kara Salyangozu Yetiştiriciliğinin Araştırılması
    (2016) Çelik, M. Yeşim; Duman, Mehmet Bedrettin
    [No abstract available]
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    Sinop ilindeki kara salyangozlarından Helix aspersa ve Helix lucorum' un biyokimyasal kompozisyonu, et verimi ve Üreme periyodunun belirlenmesi
    (Sinop Üniversitesi, 2015) Duman, Mehmet Bedrettin; Çelik, Meryem Yeşim
    Çalışma ekonomik değere sahip kara salyangozlarından Helix aspersa ve Helix lucorum üzerinde, Haziran 2012 - Mayıs 2013 tarihleri arasında Sinop ilinde gerçekleştirilmiştir. Araştırmada Helix aspersa ve Helix lucorum türü kara salyangozlarının boyu, canlı ağırlığı, yenilebilir et ağırlığı, iç organ ağırlığı, et verimi yanında kuru madde, kül, protein, yağ ve karbonhidrat oranları belirlenmiştir. Bir yıllık çalışma süresince elde edilen verilere göre H. lucorum'da ortalama boy, canlı ağırlık, yenilebilir et ağırlığı, iç organ ağırlığı ve et verimi sırasıyla; 3.98±0.42 cm, 18.06±1.48 g, 4.21±0.68 g, 5.10±1.07 g, %23.60±1.80 olarak, ortalama kuru madde, kül, protein, yağ, karbonhidrat oranı sırasıyla; %17.27±1.37, %15.46±1.30, %65.01±2.28, %3.79±1.25, %15.75±2.50 olarak bulunurken H. aspersa'da boy, canlı ağırlık, yenilebilir et ağırlığı, iç organ ağırlığı ve et verimi ortalamaları sırasıyla; 3.44±0.33 cm, 10.04±1.06 g, 2.40±0.53 g, 3.23±0.78 g, %23.10±1.55 olarak, kuru madde, kül, protein, yağ, karbonhidrat oranı sırasıyla; %16.13±1.49, %11.92±1.06, %63.04±2.51, %4.10±1.12, %20.93±2.73 olarak bulunmuştur. Sonuç olarak, her iki türde protein değerlerinin üreme dönemlerine bağlı olarak ilkbahar ve sonbahar aylarında, yağ değerlerinin ise üreme ve uyku dönemlerine bağlı olarak değişiklik gösterdiği tespit edilmiştir.
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    Site properties for snail farming: the role of environmental factors and soil profiles in Cornu aspersum mineral content
    (Springer, 2024) Celik, Meryem Yesim; Culha, Saniye Turk; Duman, Mehmet Bedrettin; Altan, Can Okan; Goren, Gulsen Uzun; Kostekli, Bayram
    The research aims to emphasize the importance of site selection in snail farming by examining how differences in environmental variables and regional characteristics influence the mineral content of Cornu aspersum snails. This is achieved through a comparative analysis of the mineral contents in their muscle tissue and shells, including calcium, potassium, phosphorus, magnesium, sodium, ash, and dry matter, across two locations in the Black Sea region: Fatsa (F) and Sinop (S). The study found that snails allocate resources based on available calcium to strengthen their shells for survival. Snails in Fatsa, with high sodium intake, may be unhealthy and suffer from dehydration, and the quality of their meat appears poor due to unfavorable calcium-to-phosphorus and sodium-to-potassium ratios. In Sinop, higher calcium and inorganic content in shells provided hardness, while high calcium in meat caused toughness. These findings underscore the significance of understanding and managing soil profiles for sustainable snail farming, thereby informing site selection and optimizing conditions for growth and nutritional quality.