Effect of dietary inclusion of various sources of green tea on growth, body composition and blood chemistry of the juvenile olive flounder, Paralichthys olivaceus

Abstract

This study was performed to determine the effect of the dietary inclusion of various sources of green tea on growth, body composition and blood chemistry of the olive flounder. Twenty-five juvenile fish were distributed into each of 15 180 l flow-through tanks. Five experimental diets with triplicates were prepared: control, raw leaves, dry leaves, by-product and extract. The 5% various sources (raw leaves, dry leaves and by-product) of green tea were included in the experimental diets at the expense of 5% wheat flour. The extract was diluted with water and mixed with the ingredients to maintain 5% green tea at the same concentration as in the other diets. Weight gain and specific growth rate of fish fed the control diet and experimental diet containing extract were higher than those of fish fed the diets containing raw and dry leaves and by-product. Feed and protein efficiency ratio for fish fed the control diet and diet containing extract was higher than for fish fed the diets containing raw leaves and by-product. The level of low-density lipoprotein (LDL) cholesterol of fish fed the control diet was higher than that of fish fed the other diets containing various sources of green tea. The glutamic oxaloacetic transaminase (GPT) concentration of fish fed the diets containing raw leaves and extract was lower than that of fish fed the control diet. Crude lipid content of liver in fish fed the control diet was higher than that in fish fed the diets containing raw and dry leaves and by-product but was not significantly different from that of fish fed the diet containing extract. Dietary inclusion of extract was the most effective way to improve growth and feed utilization of the olive flounder among the various sources of green tea, and all sources of green tea were effective in lowering serum LDL cholesterol and GPT of the fish.

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“…E abrogated this phenomena (Peng et al, 2009). Dietary GTE could lower lipid content of liver in flounder, Paralichthys olivaceus although the body lipid of the fish, without the livers, did not show any change in compare to control (Cho et al, 2006). Clinical signs of fatty liver was not seen in experimental groups while after dissection increase in liver weight was recorded in our study.…”

“…Green tea as food additive in fish diet had been reported to increase disease resistance, improved survival rate, growth rate, stress responses and antioxidant system (Cho, Lee, Park, Ji, Lee, Bae, & Oh, 2006;Abdel-Tawwab, Ahmad, Seden & Sakr, 2010;Sheikhzadeh, Nofouzi, Delazar, & Oushani, 2011;Ebrahimi, Salati, Azarm, & Hasanpour, 2015). Main compositions of green tea, a product that made up from leaf and buds of the plant Camellia sinensis are tea polyphenols, vitamins, nitrogenous compounds, caffeine, inorganic elements, lipids and carbohydrates (Ebrahimi et al, 2015).…”

The effects of the fig (Ficus carica) extract and onion (Allium capa) extract addition to Cyprinus carpio feeds in different amount on the growth performance

“…In the same study, decrease in HSI amount in parallel with VSI amount might be resulted from oregano's effect in reducing the liver fat. Decrease in HSI amount were acquired through the use of (Quillaja saponin, Astragalus radix + Lonicera japonica and green tea) in different studies carried out among fishes (Francis et al, 2002;Zakes et al, 2008;Cho et al, 2007). When the low level of HSI amount is linked to the fat rate in liver, it can be said that the used vegetable sources reduce liver fat among carps.…”

Effect of Dietary Addition of Green Tea Camellia sinensis, on Growth, Body Composition and Hematic Biochemistry of the Asian Seabass Lates calcarifer Fingerlings

“…Green tea has been shown to contain various types of catechins, including more than 70% polyphenols, vitamins, nitrogenous compounds, caffeine, inorganic elements, lipids and carbohydrates [16], and interest is continuously growing with regard to green tea's various beneficial health effects. Despite its excellent potential, little studies have thus far evaluated its potential use in the aquaculture practices [17][18][19][20][21][22][23][24]. Therefore we attempted to study the effect of dietary addition of green tea (Camellia sinensis) on growth, body composition and serum biochemistry of a little studied commercially important species Asian seabass (Lates calcarifer) commonly called the giant sea perch or barramundi.…”