Effect of Dietary Inclusion of Green Tea (Camellia sinensis) Powder on Growth Performance, Feed Utilization and Body Composition in Rainbow Trout (Oncorhynchus mykiss)

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Bilgin Ö., ARIMAN KARABULUT H., Tırıl S. U.

Turkish Journal of Fisheries and Aquatic Sciences, cilt.25, sa.7, 2025 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 25 Sayı: 7
  • Basım Tarihi: 2025
  • Doi Numarası: 10.4194/trjfas26512
  • Dergi Adı: Turkish Journal of Fisheries and Aquatic Sciences
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aqualine, Aquatic Science & Fisheries Abstracts (ASFA), BIOSIS, CAB Abstracts, Veterinary Science Database
  • Anahtar Kelimeler: Feed utilization, Green tea, Growth performance, Hypolipidemic, Rainbow trout
  • Recep Tayyip Erdoğan Üniversitesi Adresli: Evet

Özet

This study was conducted to evaluate the effect of dietary inclusion of green tea powder on growth performance, feed utilization and body composition of rainbow trout. A total of 546 fish with an average body weight of 40.4±0.01 g were divided in the seven experimental treatments. The fish were fed with diets containing 0%(control), 0.25%(diet1), 0.5%(diet2), 1%(diet3), 2%(diet4), and 3%(diet5) of dried green tea (GT) powder containin 5.3±0.04% epigallocatechin gallate-3-gallate (EGCG), 1%(diet6) green tea dust (GTD) containing 6.5±0.07% EGCG for 60 days. Fish fed with diet 2 had higher weight gain, specific growth rate, apparent net protein retention, and protein efficiency ratio than other groups, and had a lower feed conversion ratio than other groups, but not significantly changed than control group (P>0.05). Crude lipid content of liver and fillet in fish fed experimental diets were significantly lower than of fish fed the control diet (P<0.05). These results showed that dietary supplementation of GT powder in trout feed promoted the growth performance and feed utilization, and also administration of 1% level of GTD and different doses of GT powder in the experimental diets showed lipid-lowering effects for rainbow trout.