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Sung Hwoan Cho Sang-Mok Lee Byum Hee Park Sung-Choon Ji Jinhwan Lee Jeanhee Bae Sung-Yong Oh 《Fish physiology and biochemistry》2007,33(1):49-57
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. 相似文献
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Sung Hwoan Cho Sang-Mok Lee Byum Hee Park Sung-Choon Ji Jinhwan Lee Jeanhee Bae Sung-Yong Oh 《Journal of the World Aquaculture Society》2006,37(2):168-174
Compensatory growth of juvenile olive flounder, Paralichthys olivaceus L., and changes in proximate composition and body condition indexes of fish during fasting and after refeeding were investigated during the summer season. Groups of 25 fish each (initial body weight of 16 g) were randomly distributed into fifteen 180‐L flow‐through tanks. Fish were fed the experimental diet containing crude protein 46.9% and crude lipid 8.0% with estimated energy level of 14.6 kJ/g diet for 6 d/wk. Five treatments in triplicate were prepared for this study: C, S1, S2, S3, and S4. Fish in the control group (C) were hand‐fed to apparent satiation twice daily. Fish in treatments S1, S2, S3, and S4 experienced 1, 2, 3, and 4 wk of starvation and were then hand‐fed to apparent satiation twice daily during the remaining 7, 6, 5, and 4 wk of the experiment, respectively. A group of starved fish in the similar size was stocked and fasted throughout the 8‐wk feeding trial for chemical and blood analysis. The feeding trial lasted for 8 wk. Weight of fish linearly decreased with week of starvation (P < 0.0001). Linear relationship between condition factor (CF) and hepatosomatic index (HSI) against week of starvation was observed in the starved group of fish. Survival was not significantly (P > 0.05) affected by feeding strategy. However, weight gain and specific growth rate (SGR) of olive flounder in C, S1, and S2 were significantly (P < 0.05) higher than those of fish in S3 and S4. The poorest weight gain and specific growth rate (SGR) were obtained in fish of S4. Feed consumption of olive flounder in C, S1, and S2 was significantly (P < 0.05) higher than that of fish in S3 and S4. Feed efficiency, protein efficiency ratio, and protein retention of olive flounder in C and S1 were not significantly (P > 0.05) different from those of fish in S2 but significantly (P < 0.05) higher than those of fish in S3 and S4. Hematocrit, CF, and HSI of olive flounder were not significantly (P > 0.05) affected by feeding strategy. Chemical composition of fish was not significantly (P > 0.05) affected by feeding strategy. In considering these results, it can be concluded that juvenile olive flounder have the ability to fully compensate for 2‐wk feed deprivation during the summer season. Besides, feed efficiency in fish fed for 7 and 6 wk after 1‐ and 2‐wk feed deprivation was comparable to that in fish fed for 8 wk. 相似文献
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