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當前位置首頁 » 脂肪酸營養研究中心 » 日糧膽汁酸對草魚生長性能、體組成、脂質代謝及微生物區系的影響

日糧膽汁酸對草魚生長性能、體組成、脂質代謝及微生物區系的影響

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掃一掃!日糧膽汁酸對草魚生長性能、體組成、脂質代謝及微生物區系的影響掃一掃!
瀏覽:- 發布日期:2019-08-12 17:09:00【

子弹视频 To investigate the effects of dietary bile acids (BA) on growth and metabolism of lipid in grass carp (Ctenopharyngodon idella, C. idella) at high dietary lipid level,a basal diet (50 g/kg lipid, 5L group) was supplemented with 20 g/kg soybean oil (70 g/kg lipid, 7L group); then, 0.06 g/kg BA was added in 7L diet to form the third diet (7L+BA group). The 96C. idella(69.86 ± 6.24 g) were divided into three groups (duplicate per group) and fed three diets, respectively, for 8 weeks, and then, growth and lipid metabolism were determined. Results showed that growth of fish in 7L+BA group was significantly higher than 5L and 7L groups. The lipid level in whole body, hepatopancreas and muscle of grass carp in 7L+BA group were significantly lower than 7L group. Relative expression of lipid catabolism genes in hepatopancreas and muscle of 7L+BA group was significantly higher than 5L group. The amount of microbiota in intestine of fish in 7L+BA group was significantly higher than the other two groups. The present results indicated that BA in 7L diet improved growth of fish by increasing protein synthesizing, decreasing lipid content in fish body and by regulating amount of microbiota in intestine of fish.

Keywords:adipose triglyceride lipase, fatty acid synthase, growth performance, intestinal microbiota, lipid accumulation, protein deposition

子弹视频 日糧膽汁酸對草魚生長性能、體組成、脂質代謝及微生物區系的影響

子弹视频 為研究高脂日糧中膽汁酸對草魚生長和脂質代謝的影響,基礎日糧(50 g/kg油脂, EE=5%,5L組)中添加20 g/kg豆油(70 g/kg油脂, EE=7%,7L組),將0.06 g/kg膽汁酸添加到7%日糧中,即第三組(7L+BA組)。將96條草魚(69.86±6.24 g)分為三組(每組兩個重復),分別飼喂三種日糧,為期8周,測定生長性能和脂質代謝情況。結果表明,7L+BA組的生長性能顯著高于5L組和7L組。7L+BA組草魚全體、肝胰腺和肌肉中的脂肪含量顯著低于7L組。7L+BA組肝胰腺和肌肉脂質分解代謝基因的相對表達顯著高于5L組。7L+BA組腸道微生物數量顯著高于另外兩組。本研究結果表明,7L日糧中添加BA通過增加蛋白質合成、降低魚體脂肪含量和調節腸道微生物數量等方面促進魚的生長。

           關鍵詞子弹视频:脂肪甘油三酯脂肪酶,脂肪酸合成酶,生長性能,腸道菌群,脂肪積累,蛋白質沉積

           全文要點:

           1、膽汁酸顯著提高了草魚的體重、特定生長率、蛋白利用率等。原因為:膽汁酸通過提高高脂日糧中草魚脂肪酶活性、提高油脂轉運和吸收,從而提高其生長表征;

           2、膽汁酸顯著降低草魚腹腔脂肪指數和膽囊體指數,從而起到保護肝膽健康的作用;

           3、膽汁酸能夠顯著提高草魚全體蛋白含量,同時顯著降低高脂日糧中草魚肝胰腺的脂肪含量;

           4、鯨桿菌屬和擬桿菌屬能夠產生短鏈脂肪酸、乙酸酯、丙酸酯和丁酸酯,增加脂肪分解,降低脂肪合成,從而防止肥胖;厚壁菌門能夠增加腸上皮內脂滴的數量。膽汁酸可通過增加鯨桿菌屬和擬桿菌屬數量以及減少厚壁菌門的數量,從而減少高脂日糧中草魚肝臟及肝胰腺的脂肪沉積,達到保肝護膽的目的。

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