Total phenolic content, antioxidant activity, biochemical composition and physical properties of fish feed pellets supplemented macroalgae (Spirogyra sp.) extract
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Abstract
The objective of this research was to investigate the biochemical and physical properties of fish feed pellets supplemented with crude extract of freshwater green macroalgae (Spirogyra sp.) at different concentrations (0, 5, 10, and 20%). Analyses were conducted to determine the total phenolic content, antioxidant activity, biochemical composition, and physical properties of the formulated pellets. Results revealed that total phenolic content in fish feed pellets increased with higher extract concentrations and showed a statistically significant difference (P<.05). In contrast, the antioxidant activity exhibited a similar increasing trend; however, the differences were not statistically significant (P>.05). The highest values were observed at 20% concentration. Biochemical parameters such as protein, carbohydrate, and fiber content slightly increased, although not significantly (P>.05). In terms of physical properties, water absorption and dust percentage significantly decreased (P<.05) with increasing extract concentration, while water stability, floating ability, and bulk density remained statistically unchanged. These findings indicate that Spirogyra extract possesses potential as a natural additive in aquafeed to enhance nutritional value and support fish health, providing a promising and sustainable approach for commercial fish farming.
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บทความในวารสารเกษตรนเรศวรที่ได้รับการตีพิมพ์ เป็นลิขสิทธิ์ของ คณะเกษตรศาสตร์
ข้อความที่ปรากฏในบทความแต่ละเรื่องในวารสารนี้เป็นความคิดเห็นส่วนตัวของผู้เขียนแต่ละท่านไม่เกี่ยวข้องกับคณะเกษตรศาสตต์ฯ
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