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VOL. 10, ISSUE 2 (2025)
Effectiveness of green tea extract as a natural inhibitor of melanosis in pacific white shrimp (Litopenaeus vannamei)
Authors
Meghnathi Dhruvgiri, Dr. Kapila Manoj, Patel Tirthraj, Patel Jagdishkumar
Abstract
Melanosis, an enzymatic browning process catalysed by polyphenol
oxidase, significantly reduces the commercial value of shrimp post-harvest.
Freshly harvested shrimp were treated with 2% and 3% concentrations of either
SMBS or green tea extract and stored at room temperature and <4 °C. Visual
assessments were conducted every 3 hours over an 18-hour period to record
melanosis progression. Results demonstrated that both treatments significantly
reduced black spot development compared to the untreated control, with SMBS
showing superior inhibition, especially under room temperature conditions and
at higher concentrations. However, green tea extract also provided substantial
protection against melanosis, particularly when combined with cold storage,
highlighting its potential as a natural alternative to synthetic preservatives.
The study confirmed a dose-dependent effect, as 3% concentrations of both treatments
yielded fewer melanised shrimp pieces than 2% concentrations. Furthermore,
refrigeration markedly slowed melanosis progression across all groups. These
findings align with previous research emphasizing the antioxidant and
polyphenol-rich profile of green tea as a promising natural preservative. The
study concludes that while SMBS remains highly effective, green tea extract can
serve as a safer, natural inhibitor of melanosis in shrimp, thereby extending
shelf life and maintaining product quality during storage. This research
contributes to sustainable seafood preservation strategies, prioritizing
consumer safety and environmental responsibility.
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Pages:16-20
How to cite this article:
Meghnathi Dhruvgiri, Dr. Kapila Manoj, Patel Tirthraj, Patel Jagdishkumar "Effectiveness of green tea extract as a natural inhibitor of melanosis in pacific white shrimp (<i>Litopenaeus vannamei</i>)". International Journal of Fisheries and Aquatic Research, Vol 10, Issue 2, 2025, Pages 16-20
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