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1.
舟山褐牙鲆(Paralichthys olivaceus)仔鱼摄食和生长的研究   总被引:1,自引:0,他引:1  
试验研究了褐牙鲆Paralichthys olivaceus仔鱼的摄食和生长。结果表明,仔鱼初次开口摄食时间在6日龄(16~18℃),初次摄食率为30%,8日龄饥饿仔鱼最大初次摄食率为65%,孵出后第9天达到不可逆点(PNR),混合营养期为3d左右。初次摄食强度和初次摄食率开始时较低,在卵黄囊耗尽时达最高,然后下降。随着饥饿时间的延长,仔鱼出现“负增长”,孵化第11天存活率仅为10%,12日龄全部死亡。  相似文献   

2.
牙鲆消化道发育的组织学观察   总被引:1,自引:0,他引:1  
牙鲆(Paralichthys olivaceus)肉质鲜美、营养价值高,是我国重要的海水养殖鱼类之一,同时,牙鲆二次变态显著,是研究硬骨鱼类变态发育很好的模式生物。在其变态过程前后,外型上最大的变化是其右眼的移位,内部器官如脑颅骨、骨骼肌等都发生结构和功能上的改变,而消化道的发育和分化,特别是其胃在变态前后有显著的变化。消化系统的发育关系到饵料的选择,与仔鱼成活率有直接关系,有较为重要的研究价值。[第一段]  相似文献   

3.
Two feeding trials were carried out to determine the optimum feeding rates in juvenile olive flounder, Paralichthys olivaceus, at the optimum rearing temperature. Fish averaging 5.0 ± 0.11 g (mean ± SD) in experiment 1 and 20.2 ± 0.54 g (mean ± SD) in experiment 2 were fed a commercial diet at the feeding rates of 0%, 3.0%, 4.0%, 4.25%, 4.5% and 4.75% body weight (BW) day?1 and satiation (5.52% BW day?1) in experiment 1 and 0%, 1.0%, 2.0%, 3.0% and 3.5% BW day?1 and satiation (4.12% BW day?1) in experiment 2 at 20 ± 1 °C. Both feeding trials lasted for 2 weeks. Results from experiment 1 indicated that weight gain (WG) and specific growth rate (SGR) of fish fed to satiation were significantly higher than those of fish fed at other feeding rates while feed efficiency (FE) and protein efficiency ratio (PER) of fish fed at 4.25% BW day?1 were significantly higher than those of fish fed to satiation and fish fed at 3.0% BW day?1 (< 0.05). In experiment 2 WG, SGR and PER leveled out after the feeding rate of 3.5% BW day?1 whereas FE reached a plateau at 3.0% BW day?1. anova of FE indicated that the optimum feeding rates in 5.0 and 20 g juvenile olive flounder could be 4.25% and 3.0% BW day?1, respectively. Broken line analysis of WG suggested the optimum feeding rates of 5.17% and 3.47% BW day?1 in 5.0 and 20 g fish, respectively. Therefore, these results indicated that the optimum feeding rates could be >4.25 but <5.17% BW day?1 for 5.0 g, and it could be >3.0 but <3.47% BW day?1 for 20 g size of juvenile olive flounder at the optimum rearing temperature.  相似文献   

4.
5.
鱼类在水中游泳时,需要克服水的阻力从而需要消耗一定的能量.鱼类依鱼种、大小以及形态特征的差异,在同样的水流条件或游泳速度下,其水中阻力也不相同.本研究通过对褐牙鲆(Paralichthys olivaceus)在垂直循环水槽中进行游泳阻力测试实验,分别用3种特征面积(横截面积、湿表面积和鱼体体积的2/3次方),获得褐牙鲆3种不同的阻力系数.经比较分析发现,在雷诺数Re为2.7×104~1.91×105时,采用湿表面积作为褐牙鲆的特征面积获得的阻力系数的平均值为0.020,此时标准差最小,仅为0.000 76.而分别用横截面积和鱼体体积的2/3次方时获得的阻力系数的标准差相对较大.因此,用褐牙鲆的湿表面积计算得到的阻力系数更适合于该种鱼类个体水中阻力的研究.  相似文献   

6.
冯俊荣  陈营  刘红梅 《水产科学》2006,25(4):163-165
对体重7.5~20.0 g的牙鲆幼鱼的摄食比率、食物的消化时间、消化道不同部位蛋白酶的最适pH值、蛋白酶和脂肪酶的分布和摄食后不同时间蛋白酶的变化规律进行了研究。结果表明:牙鲆幼鱼的平均摄食量为净体重的5.89%。摄食配合饲料后约5 h,胃内的食物基本排空。pH值为2.6~3.0时胃蛋白酶的活性最高,pH值为8.2时幽门盲囊和肠道的蛋白酶活性最高。消化道中蛋白酶活性的变化趋势为由前向后逐渐降低,以胃蛋白酶活性最高;脂肪酶活性变化趋势为由前向后逐渐增高,以肠道脂肪酶活性最高。摄食后不同时间牙鲆消化道各部位的蛋白酶活性有显著变化,胃蛋白酶活性在摄食后3 h达到最高值,摄食后7 h降至极低水平;肠道蛋白酶活性在摄食后呈现逐渐增高趋势;幽门盲囊中蛋白酶活性变化与胃和肠道密切相关。在下一次摄食前消化道各部位蛋白酶活性均处于较高水平。  相似文献   

7.
牙鲜幼鱼能量代谢的初步研究   总被引:20,自引:1,他引:20  
对个体重2.5~87.6g的牙鲆幼鱼的代谢进行测试。结果表明:温度和体重对牙鲆幼鱼的耗氧率及二氧化碳排出率有明显的影响;牙鲆幼鱼的呼吸商为0.82±0.08,氧氮比为23.8±6.6,其能源物质以蛋白质和脂肪为主;牙鲆在盐度为30、25、20和15的水中,平均代谢率分别为3.08、3.07、3.87和3.28J/g·h,说明牙鲆幼鱼适盐较广,在本实验盐度阈值内,对鱼体代谢基本没影响。  相似文献   

8.
以牙鲆(Paralichthys olivaceus)为母本,圆斑星鲽(Verasper variegatus)为父本进行科间远缘杂交,观察和记录了杂交受精卵胚胎及胚后仔鱼的发育情况,描述了各时期的形态特征。杂交受精卵为浮性卵,其受精率和孵化率分别为(71.18±0.14)%和(61.65±0.19)%,胚胎发育的畸形率为(17.00±0.06)%,4日龄仔鱼出苗率为(58.63±0.19)%,35日龄仔鱼的成活率为(57.08±0.20)%。在水温为(15±0.5)℃、海水盐度为29~30的条件下,受精卵经74 h孵化。孵化后4 d开口摄食,17 d开始变态,35 d完成变态。变态时,37%的仔鱼向右偏转,63%的仔鱼向左偏转。结果表明,牙鲆和星鲽杂交不存在配子不亲和,受精卵可以正常发育,杂交子代可以正常成活和生长。本研究旨为下一步杂交育种奠定基础。  相似文献   

9.
Effect of dietary nutrient composition on compensatory growth of juvenile olive flounder, Paralichthys olivaceus using different feeding regimes was determined. Six treatments were prepared in triplicate: fish were daily hand‐fed with the control (C) diet twice a day, 7 days a week, for 8 weeks (8WF‐C); fish were starved for 1 week, and then fed with the C and high protein and lipid (HPL) diets twice a day, 7 days a week, for 7 weeks, referred to as 7WF‐C and 7WF‐HPL, respectively; and fish were starved for 2 weeks, and then fed with the C, HPL and HPL with supplementation of the mixture of amino acids (HPLA) diets twice a day, 7 days a week, for 6 weeks, referred to as 6WF‐C, 6WF‐HPL and 6WF‐HPLA, respectively. Growth of fish in 7WF‐HPL treatment was greater than that of fish in any other treatments. Feed efficiency of fish in 7WF‐HPL, 6WF‐HPL and 6WF‐HPLA treatments was higher than that of fish in 8WF‐C, 7WF‐C and 6WF‐C treatments. The high protein and lipid diet effectively improved compensatory growth of fish. However, supplementation of the mixture of amino acids into the high protein and lipid diet did not improve compensatory growth of fish further.  相似文献   

10.
在基础饲料中分别添加维生素E(VE)(60mg/kg标为e或300mg/kg标为E)和硒(Se)(0mg/kg标为s或2.5mg/kg标为S),制成4种试验饲料(s/e,s/E,S/e,S/E)分别饲喂初始体重为38.5±0.15g的牙鲆70d,观察其对生长性能、肝脏及血清中谷胱甘肽过氧化物酶(GSH-Px)活性、非特异免疫力以及抗病力的影响。结果表明,饲喂添加高剂量VE的两组饲料(s/E,S/E),牙鲆的特定生长率和吞噬率明显地提高(P0.05)。饲喂添加硒的两组饲料(S/e,S/E),牙鲆血液和肝脏的GSH-Px活性显著升高(P0.05)。70d投喂实验结束后,利用鳗弧菌进行攻毒试验,不添加硒和低剂量VE(s/e)使牙鲆的累积死亡率明显高于其他3组。  相似文献   

11.
An energetic method was used to investigate the effects of stocking density and dissolved oxygen (DO) concentration on the growth of juvenile Paralichthys olivaceus. Fish, with initial weights of 14±2.1 g, were exposed to a normal and a high DO of 5.5±0.5 and 14±2 mg L?1, as well as four stocking densities per DO concentration (100, 200, 300 and 400 ind m?2 for the normal DO and 200, 400, 600 and 800 ind m?2 for the high DO). The feed efficiency (FEW) decreased significantly with increasing stocking density and increased significantly with increasing DO concentration. The maximum weight was achieved at 400 ind m?2 under a high DO depending on our rearing conditions. The stocking density and DO concentration change energy ingestion and its allocation for respiration, growth and excretion lost in nitrogen excretion, but do not affect the energy loss through faeces. The results of the body composition of fish indicated that the stocking density and DO concentration had no significant effects on the moisture, lipid content and gross energy, but are affected by the same. Energetic analysis demonstrated that high DO concentrations could alleviate the growth depression caused by high stocking densities, decrease energy loss in respiration and nitrogen excretion and increase the energy proportion allocated to growth.  相似文献   

12.
ABSTRACT:   Two newly designed microparticle diets (MD), with two kinds of peptide (C700 and C800) as a protein source were developed. Microparticle diet Q (MD-Q) contained C700 (molecular weight ∼30 000 Da) and C800 (molecular weight 1000–2000 Da); in contrast, microparticle diet T (MD-T) contained C700 only. Two separate trials, representing larvae from different hatches, were conducted. Japanese flounder Paralichthys olivaceus larvae were fed newly designed MD or a combination of them with live food (LF) between 3 and 10 days after hatching (d.a.h.) in experiment I, or between 11 and 20 d.a.h. in experiment II, and compared them to LF and a commercial diet (CD) feeding groups. The growth and survival rates in both experiments were the highest in the LF treatment. But in the microparticle treatment larvae fed MD-Q had a higher survival rate and better growth than those fed MD-T, either alone or in combination with LF. First-feeding larvae fed on MD-Q had a 20.5% survival rate and 1.12 mm gain by 10 d.a.h. Unfed larvae died within 6 d.a.h. These results indicate that using a mixture of different molecular weight peptides is good protein sources and also this type of microparticle diet can be applied to flounder from larval to juvenile stages.  相似文献   

13.
分析了野生与人工养殖褐牙鲆亲鱼肝脏、背肌及卵中硒、铁、锰、铜、铬、镉和铅等微量元素的含量。结果表明,野生褐牙鲆亲鱼肝脏中硒、铁含量均显著高于养殖亲鱼(P<0.05),铜含量则显著低于养殖亲鱼(P<0.05),其他各元素间均未见显著差异(P>0.05);野生褐牙鲆亲鱼背肌中除硒和锰的含量显著高于养殖亲鱼外(P<0.05),其他各元素含量均基本保持恒定(P>0.05);野生褐牙鲆亲鱼卵中硒、铁和锰的含量均显著高于养殖亲鱼(P<0.05),其中硒的含量约为养殖亲鱼的1.7倍,铁的含量约为养殖亲鱼的2.0倍,而锰含量则为养殖亲鱼的2.8倍。养殖褐牙鲆亲鱼卵中镉含量与野生亲鱼相比高出78%(P<0.05)。两种亲鱼卵中铜、镉、铅3种重金属含量均未见显著差异(P>0.05)。  相似文献   

14.
A 70‐day feeding experiment was conducted to assess the dietary vitamin A (VA) requirements of juvenile Japanese flounder (Paralichthys olivaceus). Six semi‐purified diets with VA supplementations of 0, 5000, 10 000, 15 000, 20 000 and 25 000 IU kg?1 were fed twice a day to triplicate groups of 20 juveniles per tank with an initial weight of 1.59 ± 0.01 g (mean ± SE). Weight gain (WG) and specific growth rate (SGR) increased as dietary VA increased up to 10 000 IU kg?1. Significantly lower WG and SGR were observed for the 0 IU kg?1 treatment than for treatments of 5000, 10 000 and 15 000 IU kg?1. Highest WG and SGR were observed in fish fed 10 000 IU kg?1; slightly lower values were recorded in fish fed 15 000, 20 000 or 25 000 IU kg1. No significant difference was observed in survival rate among treatments. Whole body total lipid was significantly higher in fish fed 0 and 5000 IU kg?1 than for other levels. Reduced growth and small livers were observed as signs of VA deficiency in fish fed 0 IU kg?1. Slightly reduced growth and pale fragile livers were observed as effects of VA excess in fish fed 25 000 IU kg?1. Total retinol contents in liver and eyes increased with increasing levels of dietary VA. No retinol was detected in livers, and significantly lower total retinol content was observed in eyes, of fish fed 0 IU kg?1. WG analysed by the broken line method indicated that an optimum dietary VA requirement of 9000 IU kg?1.  相似文献   

15.
指状拟舟虫诱导牙鲆抗血清免疫球蛋白分析   总被引:3,自引:1,他引:3  
对引起牙鲆体表溃烂的原纤毛虫-指状舟虫诱导牙鲆免疫反应产生的免疫球蛋白IgM进行分析,结果表明,病原纤毛虫免疫注射牙鲆 ,可诱导牙鲆发生特异性免疫反应,产生抗体型上鲆抗指状拟舟虫血清的凝集试验,发现纤毛虫停止游动并发虫体聚集;抗血清经与标准分子量和鼠IgM单克隆抗体以及对照血清的SDS-PAGE电泳比较分析证明,牙鲆抗指状拟舟虫血清免疫球蛋白IgM重链分子量为71000,轻链分子量为23000;I  相似文献   

16.
复合诱食剂对牙鲆摄食生长的影响   总被引:11,自引:0,他引:11  
以初始体质量为(3.01±0.04)g的牙鲆(Paralichthys olivaceus)为实验对象,进行为期70 d的摄食生长实验。共配制5种等氮等能饲料,其中以鱼粉和豆粕为蛋白源(豆粕蛋白替代45%的鱼粉蛋白)配制出基础饲料,分别在基础饲料中添加0.0%、0.5%、1.0%和1.5%的复合诱食剂配制成4种豆粕取代饲料,同时以全鱼粉饲料为对照饲料,研究复合诱食剂对牙鲆摄食生长的影响。结果表明,当豆粕取代饲料中诱食剂添加量为1.0%时,牙鲆的摄食率(P<0.05)、饲料效率(P<0.05)、鱼体脂肪含量(P<0.01)以及肝脏、肠胰蛋白酶活力和肠氨肽酶活力(P<0.01)显著高于不添加诱食剂组;当豆粕取代饲料中诱食剂的添加量为0.0%和0.5%时,牙鲆的特定生长率显著低于全鱼粉组(P<0.05);而当添加量为1.0%和1.5%时,牙鲆的特定生长率与全鱼粉组比较没有出现显著差异(P>0.05)。结论认为,当以豆粕蛋白替代45%的鱼粉蛋白时,添加1.0%的复合诱食剂能够显著提高牙鲆幼鱼对饲料的摄食率和生长率。  相似文献   

17.
GnRH(gonadotropin-releasing hormone)是下丘脑-垂体-性腺轴中重要的十肽信息分子,在所有的脊椎动物的生殖神经内分泌调控中具有重要的作用。GnRH成熟的十肽沿着轴突被运送到下丘脑正中隆起(median eminence)末端,然后进入下丘脑垂体门脉循环(hypothalamo hypophyseal portal circulation)(四足动物)或直接通过轴突末梢(大多数硬骨鱼)把信号传递给刺激性腺的细胞,与特异性受体结合,刺激促性腺激素(GtHs,gonadotropins)的合成与释放,参与脊椎动物繁殖的起始和维持正常生殖功能。伴随着GnRH的研究,研究者对鱼类GnRH受体的研究也越来越感兴趣,牙鲆(Paralichthys olivaceus)是中国重要的海水养殖鱼类,本研究从牙鲆脑组织中克隆得到全长的Type Ⅰ GnRH受体,并对其组织特异性表达作了分析,为牙鲆的神经生殖内分泌研究奠定了一定的基础。 在本研究中,以海水养殖牙鲆为材料,从牙鲆脑组织中采用巢式PCR、5′-和3′-RACE技术克隆得到了1671bp牙鲆促性腺激素释放激素受体(GnRH-R)全长cDNA序列,包括147bp的5′-UTR、1248bp的开放阅读框和276bp的3′-UTR,GenBank登录号是DQ011872。牙鲆GnRH-R和其他物种GnRH-R的氨基酸序列的多序列比对结果显示,其存在许多保守的特征,牙鲆GnRH-R显示有3个主要的功能区域:1个N端胞外结构域(1~44个氨基酸残基)、1个大的跨膜结构域(45~324个氨基酸残基)和1个C端细胞质区域(325~415个氨基酸残基)。空间结构预测显示牙鲆GnRH-R跨膜区域包含7个高度保守的跨膜α螺旋(45—64、76—95、114—135、156—176、207—224、267—286、305—324),这些α螺旋是受体锚定到细胞膜上必需的。 氨基酸序列系统进化分析表明,牙鲆GnRH-R与琥珀鱼GnRH-R1具有高度同源性(85%同源性)。已知的硬骨鱼GnRH—R基因的系统进化分析表明,存在两种类型的GnRH-R基因:Type Ⅰ GnRH—R和Tpye Ⅱ GnRH-R基因。在牙鲆GnRH—R的氨基酸序列中,具有Type Ⅰ GnRH—R共有的典型基序:CAFVT(TMⅢ)和DlLEGKVSHSLTH(TMⅦ开始的序列处),表明克隆得到的牙鲆GnRH-R属于Type Ⅰ GnRH—R。 GnRH-R跨膜α螺旋之间的区域形成了胞内或胞外loops,这些区域参与受体信号转导和肽选择性功能上。牙鲆GnRH-R在TMⅢ的细胞质边界处具有一个保守的DRQSA/(DRXXXI/V)基序,这个基序被认为参与G蛋白偶联信号转导和GnRH肽诱导受体的激活;另一个保守的区域是位于TMⅦ内的NPXXY或DPXXY基序同样存在于牙鲆中(DPVIY),这个基序参与到一些GPCRs(包括GnRH-R)的内在化(internalization),同时这个基序特别是基序中的Tyr残基对于受体激活和信号转导起到关键作用。在第三个胞内loop中,鱼类GnRH—R有个保守的Ala残基(在牙鲆中为Ala^250),其也在G蛋白偶联和受体内在化方面具有重要作用。 在哺乳动物或非哺乳动物GnRH-R中,在第一个和第二个胞外loop之间由2个Cys形成1个保守二硫桥,是受体的正确折叠必需的。和其他的GnRH-R一样,牙鲆GnRH-R在第一个和第二个胞外loop之间存在由2个Cys(Cys^112和Cys^190)可以形成的潜在的二硫桥。这个二硫桥的完全缺失将会影响受体的结构完整性和降低鱼类GnRH—R对GnRH肽的选择性。 GnRH-Rs的NH2-末端区域不是很保守,但含有糖基化位点,是GnRH—Rs表达、GnRH—Rs穿梭到细胞胞表面或受体稳定必需的。将mouse的GnRH—R糖基化位点引进到人GnRH-R中,可以增加受体的数量,但不影响受体结合力或肽选择性。牙鲆Type Ⅰ GnRH—R中在NH2-末端含有3个潜在的糖基化位点(N^11SSW、N^15GSS和N^22WTA),此外,在第一个胞外loop和第二个胞外loop中分别存在1个糖基化位点(N^100ITV和N^178VTI),牙鲆Type Ⅰ GnRH—R含有的糖基化位点比哺乳动物要多,牙鲆糖基化位点的数目是否/怎样影响牙鲆GnRH-R的表达、降解率或亲和力,应该进一步研究。 在牙鲆GnRH-R的第一个胞内Ioop中,存在1个和tGnRH-R Ⅲ基序(^80KRKSH^84)一致的基序(^69KRKSH^74),这个基序是Gs识别基序(BBXXB,B代表碱性氨基酸,X代表任何一种氨基酸)。已经证明这个基序和cAMP产生相关,cGnRH-Ⅱ能通过cAMP-PKA途径提高stbGnRH-R在COS7细胞中的活性。 和其他非哺乳动物GnRH-Rs相似,牙鲆GnRH-R含有1个C-末端细胞内尾巴。这种胞内尾巴是鱼类GnRH-Rs功能必需的,在第三个胞内loop中,牙鲆GnRH-R含有2个PKC磷酸化位点(^233SKR^235和^262TLK^264);在C端尾巴中,存在1个PKC磷酸化位点(^402TAR^404)。牙鲆GnRH-RC-末端尾巴中含有鱼类GnRH-R具有的Src同源区3(SH3)结合区域(PxxP序列)(^340PPAP),能够潜在地传送偶联的能力到丝裂原活化蛋白激酶(MAPKs),GnRH通过PKC和PKA调控GtHα和LHβ转录,二者都集中于MAPK水平。 RT—PCR分析表明,GnRH-R在牙鲆脑和垂体有表达,暗示牙鲆GnRH-R参与到生殖行为如产卵行为;RT-PCR也检测到牙鲆GnRH-R在卵巢和睾丸中有表达,其能与牙鲆cGnRH-Ⅱ和sbGnRH在卵巢中共表达,GnRH肽在卵巢中具有自分泌/旁分泌功能,对牙鲆卵巢中的GnRH受体可能起到调控作用。[中国水产科学,2006,13(4):536—546]  相似文献   

18.
19.
本研究利用有丝分裂雌核发育建立牙鲆(Paralichthys olivaceus)双单倍体(Doubled Haploids,DH)群体,对牙鲆体重、全长、背鳍长、腹鳍长、体高、尾柄高、头高和躯干长共8组表型性状标准化处理后,进行主成分分析,得到可解释全部性状90.4%的表型主成分性状。然后,基于JoinMap 4、MapDisto、JoinMap 4-DistortedMap、MapDisto-DistortedMap构建4个连锁图谱,用偏分离标记矫正数量性状位点(Quantitative Trait Locus,QTL)基因型条件概率,采用Bayesian模型选择方法定位牙鲆表型主成分性状的加性QTL和上位性QTL。结果表明,用不同方法构建的遗传图谱和表型主成分性状QTL定位结果均有所不同。在图谱构建中,与基于JoinMap 4构建的图谱相比,基于MapDisto构建的图谱中偏分离标记的相对位置和遗传距离都发生了变化,甚至有5个偏分离标记没有被定位到相应的连锁群上;相对于基于JoinMap 4和MapDisto构建的图谱,经DistortedMap校正后的图谱中偏分离标记的相对位置没有发生变化,但是偏分离标记间遗传距离发生了变化。另外,在4个图谱中都检测到3个加性QTL,分别位于6号连锁群上,可解释表型变异的12.95%、14.85%、11.56%和11.76%,9号、22号连锁群上,具有负向加性效应;9号连锁群上,可解释表型变异的13.86%、13.27%、11.17%和11.25%,具有负向加性效应;22号连锁群上,可解释表型变异的5.68%、4.36%、4.97%和3.58%,具有正向加性效应。同时,分别检测到28对、19对、29对和20对上位性QTL,主要分布在6号、7号、9号、17号、20号和22号连锁群上,可解释表型主成分性状变异的2.19%~17.62%、2.40%~22.26%、2.08%~26.0%、3.16%~22.05%。研究结果表明,基于MapDisto软件构建、经DistortedMap软件包矫正后的图谱,定位结果更加准确,但仍需进一步验证。  相似文献   

20.
迟恒  绳秀珍  唐小千  战文斌 《水产学报》2009,33(6):1011-1017
应用抗牙鲆免疫球蛋白单克隆抗体(2D8、1H1)对牙鲆外周血系统、肾、脾、肝、胰、肠道组织中抗体阳性细胞进行了定位观察,并对其组织学特征进行了描述。两株单抗均能在外周血滴片和组织切片中成功地检测到抗体阳性细胞。外周血系统中的抗体阳性细胞主要为淋巴细胞,没有发现抗体阳性的巨噬细胞;牙鲆头肾中没有肾单位,肾小管、肾小球等主要存在于后肾中,脾脏和肾脏都含有巨噬细胞、粒细胞、淋巴细胞等免疫相关细胞,抗体阳性细胞存在方式也极为相似,成簇或单独分布于黑色素巨噬细胞中心和血管周围;牙鲆的胰组织镶嵌在肝上,形成肝胰脏,也参与免疫应答,抗体阳性细胞单个存在,分布于肝组织中,胰组织中没有发现抗体阳性细胞;肠道抗体阳性细胞主要存在于固有层中,有成簇存在现象,在上皮层也可见到单个存在的抗体阳性细胞。  相似文献   

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