Synergistic Effects of Cyanus depressus and Schizochytrium sp. Extracts on Growth Indices and The Expression Levels of Antioxidant and Immunity-Related Genes in Common Carp (Cyprinus carpio)

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Abstract
This study aimed to assess the combined effects of Cyanus depressus and Schizochytrium sp. extracts on growth indices and the expression of genes linked to antioxidant activity and immunity in carp (Cyprinus carpio). Fish, averaging 3.71 ± 0.16 g in weight, were assigned to three dietary groups over a 60-day period: a control group (0 g/kg extract) and two test groups receiving extract mixtures at 0.5 g/kg (CS05) and 1 g/kg (CS1). The supplemented groups, particularly those at 0.5 and 1 g/kg, showed significant increases in final body weight, weight gain, and specific growth rate. The highest superoxide dismutase (SOD) and catalase (CAT) gene expression levels were seen in fish on the 0.5 g/kg CS-supplemented diet, and CS-fed groups displayed the greatest expression of the immune-related gene interleukin-1 beta (IL-1β) relative to the control. Collectively, these findings indicate that Cyanus depressus and Schizochytrium sp. extracts, especially at a dosage of 0.5 g/kg, have promising potential as dietary supplements for enhancing the physiological health and growth of carp.
Funding Information
  • Van Yüzüncü Yıl University, Scientific Research Projects Department (FHD-2024-10941)

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