Immunostimulant effects of nucleotide isolated from yeast RNA on carp, Cyprinus carpio L.   总被引：2，自引：0，他引：2  

M Sakai  K Taniguchi  K Mamoto  H Ogawa  & M Tabata 《Journal of fish diseases》2001,24(8):433-438

Nucleotides from yeast RNA were evaluated for their ability to enhance the non-specific immune responses in carp, Cyprinus carpio . Oral administration of nucleotides to fish daily for 3 days resulted in enhanced responses of phagocytic and nitroblue tetrazolium (NBT) activities in kidney phagocytic cells. This activation of kidney cells was observed for at least 10 days post-treatment. The serum complement and lysozyme activities also increased in fish treated with nucleotides. Furthermore, the number of Aeromonas hydrophila in nucleotide-treated fish significantly decreased in the blood, kidney and liver after intraperitoneal injection. Thus yeast nucleotides appear to enhance non-specific immune responses in fish.  相似文献   

The effect of feeding three anabolic steroids in different combinations on the growth,food conversion efficiency and protein and nucleic acid levels of liver,kidney, brain and muscle of mirror carp (Cyprinus carpio)     

Khalid P. Lone 《Fish physiology and biochemistry》1989,6(3):149-156

A study on the effect of three different anabolic-androgenic steroids on the growth, food conversion efficiency and nucleic acid contents of liver, kidney, brain and muscle of carp,Cyprinus carpio was undertaken. The three steroids, methyltestosterone (MT), ethylestrenol (EE) and oxandrolone (ON), were fed in different combinations at final concentrations of 5 or 6 mg/kg diet for 60 days. No effect on the growth was observed in any of the experimental groups. A decrease in the specific growth rate (11–21%) and food conversion efficiency (20–29%) was noted. Feeding of drugs increased the cranio-somatic and reno-somatic index in all except one group. Hepatosomatic (ON+MT) and viscero-somatic (ON+MT; EE+MT+ON) indices decreased. Protein increased and RNA/DNA decreased in only one group while a decrease in protein/DNA was observed in the liver of all experimental groups. RNA/DNA increased and protein/RNA decreased only in one group while no effect was seen in protein and protein/DNA contents in any of the treated kidneys. Proteins, protein/RNA and protein/DNA decreased in certain groups in brain tissue. In muscle, no effect was seen in proteins or protein/DNA. Protein/RNA decreased in all but one group while RNA/DNA was higher only in the group fed all the three steroids together.  相似文献   

鲤鱼脱脂方法的研究   总被引：1，自引：0，他引：1  

王雅卿  郭恒斌  曾庆祝 《水产科学》2006,25(6):297-300

分别采用水漂洗、有机溶剂浸提、脂肪酶酶解的方法对鲤鱼鱼肉进行脱脂。试验结果表明,水漂洗法中,清水漂洗效果最优;有机溶剂浸提法中,异丙醇脱脂效果最佳,并对其采用正交试验方案对异丙醇脱脂工艺进行优化,得到最佳试验条件是:脱水时间30 m in,脱脂时间110 m in,温度为75℃,溶剂添加量为50 g;脂肪酶脱脂试验得出最佳条件是加酶量40 U/m l,酶作用时间50 m in。3种方法中,脂肪酶脱脂效果最佳。  相似文献   

饲料Vc对异育银鲫的生理效应及其适宜添加量     

宋学宏  蔡春芳  赵林川  潘新法  吴康  张建 《中国水产科学》2002,9(4):359-362

在精制饲料中分别添加不同剂量Vc(0、37.5、75、15 0、30 0、6 0 0和 12 0 0mg/kg) ,连续投喂异育银鲫 (方正银鲫♀×兴国红鲤♂ ) (Carassiusauratusgitelio) 8周。结果显示 ,当饲料中缺乏Vc时异育银鲫虽没有出现明显的缺乏症状 ,但日增重率、血红蛋白含量和血清POD酶活性均低于Vc添加组 ,而红细胞脆性极显著地高于高剂量Vc添加组 (P <0 .0 1) ;同时 ,经新复极差检验 ,在适宜范围内随着饲料Vc含量增加 ,异育银鲫日增重率、血红蛋白含量、POD活性等指标显著提高 ,而红细胞脆性明显下降 (P <0 .0 5 )。综合以上指标的非线性回归分析结果 ,建议生产上异育银鲫饲料Vc适宜添加量为 30 0～ 5 0 0mg/kg。  相似文献   

不同给药方式下培氟沙星在鲤体内的药代动力学研究   总被引：1，自引：0，他引：1  

李改娟  刘艳辉  祖岫杰  鞠松柏  王文兰  陈伟强  刘铁钢 《大连海洋大学学报》2014,(4):386-390

在水温为18℃下,按10 mg/kg（体质量）对体质量为（200±30）g的福瑞鲤Cyprinus carpio单次肌肉注射和混饲口灌培氟沙星,于不同时间点采集鲤血浆、肌肉、肝胰脏、肾脏组织,经超高液相色谱法测定各组织中培氟沙星的浓度,并采用DAS 3.0药物代谢动力学软件的非房室模型统计矩方法分析药时数据。结果表明：混饲口灌给药和肌注给药后,培氟沙星的药时曲线下面积（ AUC）分别为88.35、139.9 mg·h/L,达峰浓度（ Cmax ）分别为2.092、3.687 mg/L,达峰时间（ Tmax ）分别为4.0、0.5 h,消除半衰期（ t1/2）分别为22.301、74.357 h,表观分布容积（ Vd ）分别为5.464、15.342 L/kg,总体清除率（ CL ）分别为0.170、0.143 L·kg/h。研究表明,肌肉注射给药较混饲口灌达峰时间短,达峰浓度高,半衰期长,生物利用度高。  相似文献   

几种淡水养殖鱼死后僵硬的季节变化   总被引：3，自引：0，他引：3  

刘承初  王慥  王莉平  骆肇荛 《水产学报》1994,18(1):1-7

几种淡水养殖鱼活杀死后在室全僵的时间（Ｔｒ）同其生活时的水温（ｔ）之间存在着良好的负相关，即ｌｎＴｒ＝５．０３７－０．１１６５ｔ（ｒ＝－０．９２３６），显示出明显的季节差异。死后僵硬还受致死方法影响，表现为活杀鱼的僵硬时间长，挣扎死的短，半死的近于二者之间。据此，讨论了在温度低，僵硬期长的季节，采用冰藏或１０℃以常温条件下活杀鲜鱼流通上市，拓宽淡水养殖鱼类流通渠道的可能性及活杀鲜鱼的鲜度质量指标等  相似文献   

草鱼出血病细胞培养弱毒疫苗的制备及其免疫效果   总被引：11，自引：1，他引：11  

许淑英  李焕林  邓国成  姜兰 《水产学报》1994,18(2):110-117

本文报道经筛选的ＧＣＨＶ－８４１毒株在草鱼吻端成纤维细胞系中进行适应性培养，弱毒驯化，细胞培养弱毒疫苗的制备，安全性观察，不同稀释度和剂量的免疫保护率测定及保存试验，ＧＣＨＶ－８４１毒株在ＰＳＦ细胞中继代驯化至５３代达到减毒目的。筛选得５３－５９代作毒株在ＰＳＦ细胞中继代驯化至５３代达到减毒目的，筛选得５３－５９代作毒种制备的细胞制备细胞弱毒疫使用安全，用稀释１０－１０＾４倍的疫苗，０．１－０．３  相似文献   

超高压对草鱼肌肉超微结构与质构特性的影响   总被引：3，自引：0，他引：3  

沈月新 《水产学报》1996,20(4):343-347

研究了等静超高压对草鱼肌肉超微结构与质构特性的影响，并与猪肌肉用对照。结果表明：１．加压处理的草鱼肌肉，其超微结构中出现较明显的变化，如肌原纤维中Ａ带和Ｉ带的细丝均被破坏，粗丝相互聚集，出现间隙，Ｚ线变粗，不连续，Ｈ带和Ｍ线消失等，但肌原纤维的外形仍保持完整。２加压处理的草鱼肌肉，其外观无显著变化，色泽稍白，略有汁液流出，但质构特性与处理前无明显差别。  相似文献   

Growth testing of two breeds of common carp, Cyprinus carpio L. (Hungarian mirror and Třeboň scaly carp), in ponds with low and high stocking density     

P Hartvich  M Flaj&#;hans  V Nýdl  T Vondra  & T Pavlí&#;ek 《Aquaculture Research》2003,34(12):1015-1021

The growth of two breeds of common carp, Cyprinus carpio L., was tested in ponds under the climatic conditions of South Bohemia. T?eboň scaly carp (TR) and Hungarian mirror carp (M2) were kept in both low and high stocking densities during the second growing season and then stocked together for communal testing during the third growing season. Before the communal testing, the mean initial weights of fish from low‐ and high‐density stocks differed significantly (374.1 vs. 227.7 g for the TR breed and 766.7 vs. 317.3 g for the M2 breed respectively, P<0.01). After communal testing, mean weights of fish from low‐ and high‐density stocks gained 761.8 vs. 543.8 g for the TR breed and 1339.7 vs. 706.7 g for the M2 breed respectively. These observed weights were also significantly different (P<0.01). However, the test of corrected weight gain, i.e. gain not related to the initial weight of fish, revealed insignificant differences (P>0.01) between the weight gains after correction, i.e. the effect of different initial weights was successfully eliminated. These results seem to confirm the applicability of this method for the assessment of growth of purebred common carp under the climatic conditions of Central European fish farms.  相似文献   

The evaluation of secondary stress response of grass carp (Ctenopharyngodon idella, Val. 1844) after exposing to the saline water     

H. Yavuzcan-Yıldız  M. Kırkavgaç-Uzbilek 《Fish physiology and biochemistry》2001,25(4):287-290

The stress response of grass carp to salinity was evaluated assessing the levels of hematocrit, leucocrit, plasma glucose, sodium, potassium and calcium. Mean hematocrit values increased following exposure to salinity. Mean leucocrit values elevated after exposure to salinity for 24 h, then decreased. Mean plasma glucose increased during saline exposure for 48 h and then decreased to normal values. Plasma sodium and chloride levels were increased to their highest values after 48 h. While plasma potassium value increased with the exposure time, plasma calcium values were not affected by salinity exposure.  相似文献