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- W2367653403 abstract "To investigate the effect of dietary protein levels on growth performance,body composition,intestinal digestive enzyme activities of Cichlasoma sp.juvenile,fish meal and soybean meal were chosen as the main dietary protein source,and five diets containing protein content of 37%,40%,43%,46% and 49% were prepared and fed to Cichlasoma sp.juvenile for 6 weeks.Group of 25 fish with initial body weight of 0.66 g was fed in recycling aquarium(0.8 m×0.5 m×0.5 m,200 L of water volume) with aerated water.Each group was triplicate.Fish were fed 4 times(8:30,11:30,14:30 and 17:30) per day with a feeding rate of 3%— 4% of body weight.The temperature was(27±1) ℃,and dissolved oxygen(DO) content was more than 5 mg/L during the growth study.The results showed that the weight gain(WG) of the five groups were 868.51%,935.95%,1018.28%,925.16%,873.86%,and feed conversion rate(FCR) were 1.55%,1.48%,1.41%,1.47% and 1.56%,respectively.Fish fed with 43% dietary protein had the highest WG and lowest FCR.The relationship of WG and dietary protein level could be expressed with regression equation: Y(weight gain,%) =-3.2772X2+281.84X(dietary crude protein content,%)-5076.1(R2=0.8328).In the respect of body composition,with the increase of dietary protein,the content of crude protein and ash of whole body increased,but the crude fat decreased.Fish fed with diet of 49% protein content had significant higher whole body crude protein and ash content but lower whole body crude fat content than that fed with diet of 37% protein content.There was no significant difference in whole body moisture content among all groups.Protease activities of foregut's tissue of the five groups were 540.80 U/g,718.03 U/g,732.26 U/g,686.12 U/g,596.51 U/g,and protease activities of foregut's chyme were 726.26 U/g,948.84 U/g,1412.43 U/g,1304.66 U/g and 1406.93 U/g,respectively.Liver's GPT and GOT activities(Reitman-Frankel) were 69.89 U/g,75.75 U/g,89.05 U/g,91.20 U/g,90.66 U/g,and 140.63 U/g,163.08 U/g,181.80 U/g,150.65 U/g,150.80 U/g,respectively.Results above showed that Cichlasoma sp.juvenile had the best growth performance and the highest intestinal protease activities,the highest liver's GOT and GPT activities,when they fed with diet of 43% dietary protein content,which showed that the optimal dietary protein requirement for Cichlasoma sp.juvenile was 43%." @default.
- W2367653403 created "2016-06-24" @default.
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- W2367653403 date "2009-01-01" @default.
- W2367653403 modified "2023-09-25" @default.
- W2367653403 title "EFFECT OF DIETARY PROTEIN LEVELS ON GROWTH PERFORMANCE,WHOLE BODY COMPOSITION AND INTESTINAL DIGESTIVE ENZYME ACTIVITIES OF CICHLASOMA SP.JUVENILE" @default.
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