Yazar "Celik, M. Yesim" seçeneğine göre listele

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    Egg- and seashell waste as a calcium source in snail (Cornu aspersum Müller, 1774) feed: I. Growth, mineral distribution in meat, shell and faeces, and environmental effects
    (Taylor & Francis Ltd, 2024) Celik, M. Yesim; Dernekbasi, Seval; Sariipek, Merve
    This study evaluates the effect of diets containing three different sources of calcium (limestone, eggshell, and seashell) on the mineral composition of meat, shell, and faeces and their effect on shell structure and growth of Cornu aspersum. The diets were designated by the calcium source in their diets: chicken eggshell with its membrane (EG), seashell (SS), and limestone (LM). The results showed that the calcium content and mineral concentrations in the diet groups varied significantly depending on the calcium sources. The calcium sources influence the growth and excretion of minerals in the flesh, shell and faeces of the snails. The EG-feed had higher phosphorus (P) and zinc (Zn) levels than SS-feed and LM-feed. At the end of the experiment, the EG-group had grown larger than the other groups. The SS-group showed the lowest growth rate due to the high concentration of non-nutrient elements. Considering environmental implications, the lowest level of phosphorus, potassium and harmful heavy metals was found in the faeces of the EG group and the maximum amount in the SS group. In summary, the study shows that using eggshells offers a dual environmental benefit by recycling waste eggshells and releasing less P and K into the environment.
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    THE EFFECTS OF HOT SMOKING ON THE CHEMICAL COMPOSITION AND SHELF LIFE OF MEDITERRANEAN MUSSEL (MYTILUS GALLOPROVINCIALIS L. 1819) UNDER CHILLED STORAGE
    (Wiley, 2008) Turan, Huelya; Soenmez, Guelsah; Celik, M. Yesim; Yalcin, Metin; Kaya, Yalcin
    In this study, effects of boiling and hot smoking on proximate composition and shelf life of mussels stored at 4 +/- 1C were investigated. Dry matter, crude protein, crude fat and crude ash levels were determined as 13.94, 10.30, 1.14 and 0.95% in fresh mussels 20.75, 13.83, 2.11, 0.77% after boiling and 39.57, 22.22, 10.04%, 6.02% after hot smoking, respectively. Trimethylamine nitrogen values in fresh, boiled and hot smoked mussels were determined as 1.13, 1.01 and 1.07 mg/100 g, respectively, and increased to 24.35 mg/100 g at 18th day of the storage period. pH value in hot smoked mussels ranged between 4.85 and 4.51 during the chilled storage. According to the results, mussels smoked by hot smoking and stored at refrigerator temperature (4 +/- 1C) for 12 days can be consumed.
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    The reproductive response of Cornu aspersum to different hibernation conditions
    (Taylor & Francis Ltd, 2022) Celik, M. Yesim; Dernekbasi, Seval; Sariipek, Merve; Karayucel, Sedat
    This study was conducted between February and May 2019 on mature Cornu aspersum in the Black Sea region, Turkey to investigate the effects of different hibernation situations on reproductive responses. Three snail groups were studied: NH (natural hibernation), ASH (artificial short hibernation) and ALH (artificial long hibernation). NH showed inactive behaviour and had no reproductive activity while ASH and ALH performed intensive reproduction. During the experiment, the mean spawning rate (SpR), egg number (EgN), hatching rate (HR) and offspring number (OfN) were 20.50 +/- 1.69%, 100.10 +/- 5.22, 85.63 +/- 2.36 and 80.69 +/- 5.44 in the ASH group; 23.43 +/- 3.36%, 122.33 +/- 7.62, 61.55 +/- 10.76 and 70.26 +/- 11.60 in the ALH group, respectively. In conclusion, the high temperatures in the winter months of 2019 may have caused NH snails to become reproductively inactive, or it could simply be a consequence of their life-history strategy. Snails in the ASH and ALH groups represented a resource allocation trade-off between fecundity and survival to carry the genetic information to the next generation. This study leads to a better understanding of land snail reproductive physiology and behavioural responses to different hibernation conditions.