水生生物学报
水生生物學報
수생생물학보
ACTA HYDROBIOLOGICA SINICA
2015年
3期
490-497
,共8页
程炜轩%张丽%许国焕%吴清洋%熊达%郭莹姿%谭文俊%许迪
程煒軒%張麗%許國煥%吳清洋%熊達%郭瑩姿%譚文俊%許迪
정위헌%장려%허국환%오청양%웅체%곽형자%담문준%허적
精氨酸%N-氨甲酰谷氨酸%脂肪%尼罗罗非鱼%生长指标%内脏指标%氨基酸
精氨痠%N-氨甲酰穀氨痠%脂肪%尼囉囉非魚%生長指標%內髒指標%氨基痠
정안산%N-안갑선곡안산%지방%니라라비어%생장지표%내장지표%안기산
Arginine%N-Carbamylglutamate%Fat%Nile tilapia%Growth index%Visceral index%Amino acids
为研究精氨酸对尼罗罗非鱼(Oreochromis niloticus)的生物学效应,采用精氨酸内源合成途径的必需辅助因子N-氨甲酰谷氨酸(NCG)代替精氨酸, 研究不同剂量包被NCG制剂(实际NCG含量为80%)对尼罗罗非鱼生长及脂肪沉积的影响.实验共设 6 个制剂添加组, 分别为 0.025%、0.05%、0.1%、0.2%、0.4%、0.5%及对照组.结果显示, 罗非鱼血液中所有 NCG 添加组(0.025%—0.5%)和对照组相比, 赖氨酸、苏氨酸、亮氨酸、异亮氨酸、缬氨酸等必需氨基酸含量无显著性差异(P>0.05), 而当 NCG 添加量为 0.4%时, 精氨酸含量显著高于其他各组(P<0.05), 且约为对照组的4倍, 继续提高NCG添加量至0.5%时, 精氨酸含量无显著提高(P>0.05); 所有 NCG 添加组的末均重、特定生长率、饲料系数、内脏比和肥满度等指标与对照组相比均无显著性差异(P>0.05), 当 NCG 添加量为 0.2%时, 增重率和蛋白质效率均显著高于其他组(P<0.05), 除了0.1%NCG添加组, 其他各组全鱼蛋白质含量均高于对照组; 脂肪沉积方面, 所有NCG添加组均显示肝体比显著低于对照组(P<0.05),全鱼干物质中脂肪含量显著高于对照组 (P<0.05),脂肪有从肝转移至肌肉的倾向.饲料中添加0.4%NCG, 对于血液中精氨酸含量的提高有较好的促进作用, 而且不影响其他氨基酸的吸收;饲料中添加0.025%—0.5% NCG有利于减少肝脏脂肪沉积而增加了肌肉中的脂肪沉积,研究结果为进一步开展精氨酸影响鱼体脂肪沉积的机理研究提供了科学依据.
為研究精氨痠對尼囉囉非魚(Oreochromis niloticus)的生物學效應,採用精氨痠內源閤成途徑的必需輔助因子N-氨甲酰穀氨痠(NCG)代替精氨痠, 研究不同劑量包被NCG製劑(實際NCG含量為80%)對尼囉囉非魚生長及脂肪沉積的影響.實驗共設 6 箇製劑添加組, 分彆為 0.025%、0.05%、0.1%、0.2%、0.4%、0.5%及對照組.結果顯示, 囉非魚血液中所有 NCG 添加組(0.025%—0.5%)和對照組相比, 賴氨痠、囌氨痠、亮氨痠、異亮氨痠、纈氨痠等必需氨基痠含量無顯著性差異(P>0.05), 而噹 NCG 添加量為 0.4%時, 精氨痠含量顯著高于其他各組(P<0.05), 且約為對照組的4倍, 繼續提高NCG添加量至0.5%時, 精氨痠含量無顯著提高(P>0.05); 所有 NCG 添加組的末均重、特定生長率、飼料繫數、內髒比和肥滿度等指標與對照組相比均無顯著性差異(P>0.05), 噹 NCG 添加量為 0.2%時, 增重率和蛋白質效率均顯著高于其他組(P<0.05), 除瞭0.1%NCG添加組, 其他各組全魚蛋白質含量均高于對照組; 脂肪沉積方麵, 所有NCG添加組均顯示肝體比顯著低于對照組(P<0.05),全魚榦物質中脂肪含量顯著高于對照組 (P<0.05),脂肪有從肝轉移至肌肉的傾嚮.飼料中添加0.4%NCG, 對于血液中精氨痠含量的提高有較好的促進作用, 而且不影響其他氨基痠的吸收;飼料中添加0.025%—0.5% NCG有利于減少肝髒脂肪沉積而增加瞭肌肉中的脂肪沉積,研究結果為進一步開展精氨痠影響魚體脂肪沉積的機理研究提供瞭科學依據.
위연구정안산대니라라비어(Oreochromis niloticus)적생물학효응,채용정안산내원합성도경적필수보조인자N-안갑선곡안산(NCG)대체정안산, 연구불동제량포피NCG제제(실제NCG함량위80%)대니라라비어생장급지방침적적영향.실험공설 6 개제제첨가조, 분별위 0.025%、0.05%、0.1%、0.2%、0.4%、0.5%급대조조.결과현시, 라비어혈액중소유 NCG 첨가조(0.025%—0.5%)화대조조상비, 뢰안산、소안산、량안산、이량안산、힐안산등필수안기산함량무현저성차이(P>0.05), 이당 NCG 첨가량위 0.4%시, 정안산함량현저고우기타각조(P<0.05), 차약위대조조적4배, 계속제고NCG첨가량지0.5%시, 정안산함량무현저제고(P>0.05); 소유 NCG 첨가조적말균중、특정생장솔、사료계수、내장비화비만도등지표여대조조상비균무현저성차이(P>0.05), 당 NCG 첨가량위 0.2%시, 증중솔화단백질효솔균현저고우기타조(P<0.05), 제료0.1%NCG첨가조, 기타각조전어단백질함량균고우대조조; 지방침적방면, 소유NCG첨가조균현시간체비현저저우대조조(P<0.05),전어간물질중지방함량현저고우대조조 (P<0.05),지방유종간전이지기육적경향.사료중첨가0.4%NCG, 대우혈액중정안산함량적제고유교호적촉진작용, 이차불영향기타안기산적흡수;사료중첨가0.025%—0.5% NCG유리우감소간장지방침적이증가료기육중적지방침적,연구결과위진일보개전정안산영향어체지방침적적궤리연구제공료과학의거.
The direct addition of arginine into diets causes malabsorption of other amino acids in farmed fish. To study the biological effects of arginine in Nile tilapia, we replaced arginine with N-Carbamylglutamate (NCG), an essential cofactor glutamate in the endogenous arginine synthesis pathway. We examined the effects of NCG (actual content of 80%) in different doses (0.025%, 0.05%, 0.1 %, 0.2 %, 0.4 % and 0.5%) on the concentration of amino acids in the blood, the growth, and the fat deposition in Nile tilapia. The results showed that there was no significant difference be-tween the control group and the NCG-containing groups in the levels of lysine, threonine, leucine, valine and isoleucine in the blood. The blood arginine level increased significantly in the fish fed with 0.4% NCG, which was four times as the control group, but there was no difference in the fish fed with 0.5% NGG compared to the control (P>0.05). In terms of the final weight gain rate, the specific growth rate, the feed coefficient rate, the viscera-somatic index and the condition factor, there were no differences between the NCG groups and the control group (P>0.05). The weight gain and the protein efficiency ratio were significantly elevated in the fish fed with 0.2% NCG (P<0.05). The whole fish protein content of all NCG groups, except for the group of 0.1% NCG addition, was significantly higher than that of the control group (P<0.05). The hepatosomatic index of all NCG groups was significantly lower than that of the control group (P<0.05), and the whole fish fat content of the NCG groups was higher than that of the control group, except for the group of 0.1% NCG addition, which implied the transfer of fats from the liver to the muscles. The diet containing 0.4% NCG effectively improved the arginine level in the blood but did not affect the absorption of other amino acids. The diet with 0.025%—0.5% NCG reduced the liver fat deposition and increased the muscle fat deposition. Our results should provide important information for future studies on the effects of arginine on fish fat deposition.