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    Öğe
    In vitro antimicrobial activities of extracts from ballan wrasse (Labrus bergylta) skin mucus
    (Adem Yavuz SÖNMEZ, 2016) Katra, Neslican; Hisar, Olcay; Karatas, Suheyla; Turgay, Emre; Sarvan, Can
    The increasing bacterial resistance against antimicrobial agents has induced the search for alternative antimicrobial resources. In this regard, antimicrobial peptides in the fish mucus seem to be usable as therapeutic agents. Antimicrobial effects of the mucus extracts obtained from the skin of various fish species. In this study, the antimicrobial effects of organic and aqueous mucus extracts obtained from the skin mucus of L. bergylta on fish isolates Yersinia ruckeri, Edwardsiella tarda, Listonella anguillarum, Aeromonas sobria, Shewanella baltica, Enterobacter sp., Citrobacter sp. and Escherichia coli, Bacillus subtilis and Lactobacillus plantarum as control strains were analysed. As a result of this study, aqueous mucus extract, aqueous phase and DCM phase that were obtained from the skin mucus of L. bergylta were found not to have any bactericidal effect on the microorganisms tested in this study.
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    Öğe
    The Effect of Whey on the Immune Parameters of Rainbow Trout (Oncorhynchus mykiss)
    (2022) Yardımcı, Remziye Eda; Turgay, Emre; Yılmaz, Sevdan; Sarvan, Can; Steınum, Süheyla Karataş
    The aim of this study was to investigate the effect of whey on the immune system of cultured rainbow trout (Oncorhynchus mykiss). It was targeted to use whey, which is a by-product of the dairy industry, in the aquaculture industry as a promoter of fish immune system and as a source of fish feed protein. Rainbow trout individuals with an average weight of 70.28 ± 1.50 g were placed in 6 tanks with a stock density of 10 kg/m3. While fish meal (52%) was used as a protein source in the control group feeds, in the experimental group feeds whey powder (48%) was used. The fish were fed these pellet feeds that were isocaloric (21 kj/g) and isonitrogenous (41% protein) for 3 weeks. Blood samples were collected once a week and while hematocrit and hemoglobin values were determined using a fully automated hematology analyzer, standard hemocytometry methods were used in erythrocyte and leukocyte counts. In addition, free radical production and complement 3 concentrations were determined quantitatively. According to the one-way ANOVA analysis, the control group and the experimental group were statistically similar (p> 0,05). However, it was found that C3 complement concentration, which was measured equally at the beginning in the control and experimental groups, showed a statistically significant increase (p <0.05) in the experimental group compared to the control group in the second week.