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- MakaleYalnız künye2026Scopus SJRQ3Characteristics of the growth rate, fatty acid profile, and shell content of the freshwater snail Viviparus contectus (Millet, 1813)
Kocabaş, Filiz Kutluyer; Kizak, Volkan; Özçiçek, Esin; Kocabaş, Mehmet; Yilmaz, Ökkeş
Freshwater snails are a nutritious food source, providing vital amino acids, minerals, and protein with low lipid levels. Hence, the adaptation ability, growth rate, fatty acid (FA) profile, and shell content of Viviparus contectus were determined. Biometric measurements were recorded for 6 months. Over the 6-month cultivation period, specific growth rates were recorded as 0.32% · day-1 for shell length and 0.92% · day-1 for body weight. The FA profile of the freshwater snail included a total of 32 compounds with saturated, monounsaturated, and polyunsaturated FAs represented by 13, 10, and 9 types, respectively. Monounsaturated fatty acids (MUFAs) exhibited the highest concentration, followed by saturated fatty acids (SFAs) s at 35.14% and polyunsaturated fatty acids (PUFAs) at 14.57%. Stearic acid (C18:0), erucic acid (C22:1 n-9), and arachidonic acid (C20:4 n-6) were determined as the most abundant FAs within the saturated, monounsaturated, and polyunsaturated FAs classes, respectively. The energy-dispersive X-ray spectroscopy spectra analysis revealed that the shell powder composition consisted of the elements, such as carbon, oxygen, calcium, iron, manganese, and silicium. Overall, V. contectus showed a clear increase in growth over the cultivation period, and future studies are needed to obtain the best culture conditions and intensive production of the species.
- MakaleYalnız künye2026Scopus SJRQ3Bioactive compounds in mucus and shell microstructure of the European ear snail (Radix auricularia)
Kocabaş, Kutluyer; Kocabaş, M.; Kizak, V.; Korkmaz, B.
Radix auricularia is a non-native and invasive freshwater snail species and it may have destructive impacts on biodiversity and ecosystem structure. In recent years, snail mucus, as a sticky substance, has garnered significant attention in the medical and cosmetic industries due to its content of numerous bioactive compounds. Despite frequently being discarded as waste due to the build-up of calcium carbonate crystals through biomineralization, shells of freshwater snail serve multiple functions in aquatic environments and have potential industrial applications. Hence, this study aims to identify bioactive compounds in the mucus and analyze the shell microstructure and mineralogy of the European ear snail (Radix auricularia). Bioactive constituents of mucus were characterized by Gas Chromatography-Mass Spectrometry (GC-FID-MS) analysis. We also conducted analyses on the organic matrix of shells from R. auricularia using X-ray diffraction (XRD) and Scanning Electron Microscope-Energy Dispersive Spectroscopy (SEM-EDS). Our results indicated that ten compounds are characterized by Eicosane (34.16%), 9-Octadecen-1-ol, (Z)-(11.86%) and N,N-Dimetylpalmitamide (5.55%) as the main components of mucus. The antioxidant potential, antifungal and anti-inflammatory properties of Eicosane was in notable quantity in the mucus. In addition, the elemental composition of shell powder comprised of carbon, aluminium, oxygen, calcium, iron, magnesium, silicium, manganese, sodium, sulphur and phosphorus. Aragonite emerged as the dominant mineralogy in the inorganic layer of their shells, as confirmed by XRD. Overall, individual compounds of mucus could be isolated and purified mucus compounds could have applications in pharmaceuticals and health sectors. The shells of R. auricularia offer potential for diverse applications and contribute to environmental sustainability as valuable biomaterials.
- MakaleYalnız künye2025Scopus SJRQ3New Record of Two Melanopsid Species (Melanopsis costata and Melanopsis buccinoidea) in the Eastern Mediterranean Basin: Morphological Variation in the Söğütlü Stream (Hatay, Türkiye)
Kocabaş, Filiz Kutluyer; Kocabaş, Mehmet
Abstract: Melanopsis costata and Melanopsis buccinoidea are freshwater gastropods within the Melanopsidae family characterized by their wide geographical distribution. The geographical distribution of the two species was evaluated within the Eastern Mediterranean Basin as part of this study. Aquatic sites were surveyed across diverse habitats in Söğütlü Stream (Hatay, Türkiye). The shell characteristics [shell height (SH), shell width (SW), spire height (SpH), aperture length (AL), and aperture width (AW)] of the two species were also examined within the ecosystem. The maximum values recorded for M. costata were a shell length (SL) of 17.40 mm and a weight (W) of 0.62 g. The highest values for M. buccinoidea were 13.75 mm for SL and 0.30 g for W. The PCA analysis demonstrated a significant relationship between shell length and shell width, aperture length, aperture width, and weight. The initial evidence of the presence of M. costata and M. buccinoidea was identified in the water body, and the distribution of both species exhibited habitat-dependent variations in their morphological traits.
- MakaleYalnız künye2025Scopus SJRQ3New Record of Peregriana labiata (Rossmässler, 1835) (Gastropoda: Lymnaeidae) in Kelkit Basin (NE Anatolia): Effect of Altitudes on Distribution and Morphological Characters
Kocabaş, Filiz Kutluyer; Kocabaş, Mehmet; Kara, Cemil; Bozali, Nuri; Gürlek, Mustafa Emre
Abstract: Peregriana labiata (Rossmässler, 1835) is a broadly distributed Palaearctic freshwater snail belonging to the family Lymnaeidae and it is an intermediate host of Fascioloides manga causing Fasciolosis as a snail-borne trematode disease. The disease negatively influences the livestock sector and human health with increasing prevalence in the last decades. As a helpful tool, geographical distribution of P. labiata was assessed in Kelkit Basin (North-East Anatolia) as a risk area for fasciolosis transmission. 85 sampling sites were sampled from different habitats in Kelkit Basin (NE Anatolia). The first evidence of P. labiata occurrence was revealed in the basin. In addition, the effects of altitudes on abundance, distribution and shell characters of P. labiata were investigated in several ecosystems. The highest values for SL (standard length) and W (weight) were recorded as 11.80 ± 0.10 mm and 0.17 ± 0.14 g at an altitude of 1233 m, respectively. The highest occurrence of P. labiata was observed at altitudes of 728 m (17%) and 1223 m (16%). PCA analysis showed a strong correlation between SpH (spire height) and AW (aperture width). Overall, the broad range of samples gathered from different altitudes strengthened the idea that the shell characteristics vary with altitude.
