Assessment of chosen semen characteristics of two colour morphs of the Arctic fox Alopex lagopus L.     

Karolina Stasiak  Stanis&#x;aw Kondracki  Maria Iwanina 《Animal Science Journal》2019,90(9):1120-1126

The aim of the study was to evaluate semen quality in the two most popular colour morphs of the Arctic fox Alopex lagopus L., blue and white, based on ejaculate parameters, acrosin activity and analysis of sperm morphology. The research material consisted of ejaculates collected once by manual stimulation from 20 one‐year‐old male Arctic foxes (10 individuals of the blue morph and 10 of the white morph). Ejaculates were evaluated in terms of volume, sperm concentration, total number of spermatozoa and the percentage of spermatozoa with major and minor defects. The study revealed that male blue Arctic foxes produce ejaculates with much higher concentration (148.75 × 10⁶/ml) and total number of spermatozoa (98.16 × 10⁶) compared to white Arctic foxes (42.88 × 10⁶/ml and 35.2 × 10⁶ respectively). The level of acrosin activity from white foxes seemed to be higher compared to blue foxes but the difference was not statistically confirmed. Semen from Arctic foxes is characterized by high inter‐individual variability in sperm morphology. The frequency of morphological changes in sperm from Arctic foxes does not significantly depend on ejaculate volume, sperm concentration or the total number of spermatozoa in the ejaculate, but is associated with acrosin activity.  相似文献   

Plasma Progesterone during the Luteal Phase and Pregnancy in Parturient and Barren Blue Fox Vixens     

Nina M. Valberg  Wenche Farstad 《Acta Agriculturae Scandinavica, Section A - Animal Sciences》2013,63(4):232-239

Abstract

The variation in progesterone secretion during the luteal phase and pregnancy in blue fox vixens was analyzed. Progesterone was measured in blood plasma once or twice a week using radioimmunoassay. The material was allocated into three groups; five mated, but barren, blue fox vixens, six mated vixens with implantation zonès in the uterus, but no cubs at parturition, and 26 normally parturient vixens. The progesterone profiles for the three different groups of females showed a steady increase in progesterone immediately after mating. Maximum values were observed on days 8–12 of pregnancy. Then the progesterone levels decreased gradually until delivery around day 52. The levels of progesterone were found to be significantly different (P<0.05) between non-pregnant and pregnant females from day 22 after mating. The plasma progesterone level seems to be affected by the presence of conceptuses.  相似文献   

提高蓝狐仔狐成活率的技术研究     

王德志  孙中野 《经济动物学报》2000,4(1):9-12

哺乳期仔狐成活率低一直是蓝狐生产的制约因素。研究结果表明 ,实施人工驯化 ,产仔人工监护 ,可使断乳时仔狐成活率达到 81 1 5%。  相似文献   

Imported disease of dogs and cats exotic to Ireland: Echinococcus multilocularis     

Goodfellow M  Shaw S  Morgan E 《Irish veterinary journal》2006,59(4):214-216

Changes in legislation that facilitate the movement of animals within the European Union may increase the risk that some microbial and parasitic organisms, currently exotic to Ireland, will be introduced by travelled pet animals. It is possible that the fox tapeworm, Echinococcus multilocularis, might be introduced in that manner from any of the several member states in which it is endemic. Red foxes are the principal definitive hosts of E. multilocularis but dogs and cats can also be infected. Infection in the definitive host is of little clinical significance, but aberrant infection of humans results in alveolar echinococcosis, a debilitating disease that has a high mortality rate. Humans acquire the organism by ingestion of Echinococcus multilocularis eggs excreted by definitive hosts; the larval metacestodes develop primarily in the liver, in the initial asymptomatic phase as small, well-encapsulated cysts. Over time, perhaps five to 15 years, progressive local infiltration and secondary cyst development at distant sites occur with resultant clinical signs. Patients with infiltrative liver disease present with cholestatic jaundice, epigastric pain, fatigue, weight loss and hepatomegaly. If left untreated, the disease can be fatal.This paper recounts the life cycle of the parasite, and discusses the control measures on which its exclusion from Ireland depend. Strict adherence to the routine worming of travelled dogs with praziquantel, at appropriate doses, 24 to 48 hours prior to entry into the country will minimise the likelihood of introduction of this zoonosis.  相似文献   

银狐的繁殖年龄和配种日期对繁殖性能的影响     

冯敏山  张进红  杨彩然  马永兴  葛旭升  安翠花  张子佳 《特产研究》2012,(2):9-11,29

本试验通过对816只母银狐的1 195个繁殖记录和51只公狐的211个繁殖记录进行了整理,统计分析了母银狐配种日期及公、母银狐年龄对主要繁殖性能的影响。结果表明:在唐山地区,母银狐2月29日前发情配种,产胎率和胎断奶成活仔兽数较高,而3月16日以后发情配种,其繁殖效率大大降低;1岁和5岁公银狐比2到4岁公银狐的配种或采精次数低,但1岁公银狐所配母银狐的平均受胎率和胎断奶成活仔兽数均高于其它年龄公银狐所配母银狐。  相似文献   

北极狐、乌苏里貉精液细管冷冻技术研究   总被引：1，自引：0，他引：1  

耿孝媛  吴晓民  车利锋  裴俊峰  李涤非  李宝山  王静婉 《经济动物学报》2005,9(4):198-200

为了对濒危珍稀动物种质资源的进行保护,完善精液冷冻技术方案,对北极狐37只次、乌苏里貉32只次的精液进行细管冷冻技术研究,结果表明,北极狐精液用3%柠檬酸三钠—卵黄—甘油作冷冻稀释液,乌苏里貉精液用11%蔗糖—卵黄—甘油作冷冻稀释液,在5℃冰箱内平衡1 h后,进行细管冷冻(液氮-196℃),冻溶粒子活力达4~5级。速冻法优于缓冻法。细管冻精在50℃温水中快速溶化,北极狐精液用3%柠檬酸三钠作解冻液,乌苏里貉精液用7%葡萄糖液作解冻液效果较佳。  相似文献   

不同水平脂肪对冬毛期蓝狐生产性能及消化代谢的影响   总被引：3，自引：2，他引：1  

刘佰阳  李光玉  张海华  李丹丽  钟伟  王凯英  常忠娟 《经济动物学报》2008,12(3)

采用单因素随机试验设计,选择冬毛期蓝狐72只,随机分成4组(Ⅰ、Ⅱ、Ⅲ、Ⅳ组),公母各半,分别饲喂在基础日粮中添加1%、4%、7%和10%豆油的4种试验饲粮,以探讨不同水平脂肪对冬毛期蓝狐生产性能和消化代谢的影响。结果表明:不同水平脂肪对日采食量和干物质消化率影响差异不显著(P>0.05);Ⅱ组的日增重高于其他组,Ⅱ组公狐的日增重显著高于Ⅲ组(P<0.05);Ⅱ组的料肉比低于其他组,其中Ⅱ组母狐的料肉比显著低于其他组(P<0.05)。公狐Ⅱ组的日食入氮显著高于Ⅰ组(P<0.05);日粪氮排出量各组间差异不显著(P>0.05);Ⅳ组公狐和母狐的日尿氮排出量分别显著(P<0.05)和极显著(P<0.01)高于其他组;Ⅱ组的日沉积氮、氮沉积率、氮表观消化率和氮生物学效价高于其他组,并且日沉积氮、氮沉积率和氮生物学效价显著(P<0.05)或者极显著(P<0.01)高于Ⅳ组。随着脂肪添加量的增加,蓝狐的食入脂肪量、脂肪消化率和可消化脂肪量也随之增加,达到了显著(P<0.05)或者极显著(P<0.01)的差异。母狐Ⅰ组的总胆固醇极显著地低于Ⅱ组和Ⅲ组(P<0.01);甘油三酯以Ⅲ组最低,公狐Ⅲ组的甘油三酯显著低于Ⅰ组和Ⅳ组(P<0.05),母狐Ⅲ组极显著低于其他组(P<0.01);对高密度脂蛋白胆固醇无影响(P>0.05);随着脂肪水平的提高,血清总蛋白呈现先升后降,公狐以Ⅱ组最高,Ⅰ组最低,两组之间差异极显著(P<0.01)。不同水平脂肪对冬毛期蓝狐的体长、干皮长、针毛长度和针毛直径的影响差异不显著(P>0.05),母狐Ⅱ组的绒毛长度极显著地高于Ⅳ组(P<0.01),公狐Ⅰ组的绒毛直径显著地高于Ⅲ组(P<0.05)。综合各项试验指标,冬毛期蓝狐日粮中添加4%的豆油效果较好。  相似文献   

气候对北极狐繁殖力影响的分析     

常秀云  毕永周 《经济动物学报》1999,3(2):4-8

为了探讨１９９８年商州市北极狐繁殖力明显降低的原因,根据对商州市郊８个养狐场北极狐繁殖情况的调查和商洛地区气象局提供的气象资料,分析了日照、温度及空气相对湿度等气候因素对北极狐繁殖力的影响,为今后制订预防措施提供了依据。  相似文献   

陕西省3种北极狐饲料中矿物质元素的含量分析     

任战军  高会战  张金王 《经济动物学报》2001,5(3):11-15

随机抽取陕西境内 3家养狐场哺乳期北极狐饲料 ,对其中的Ca、P、K、Mg、Fe、Cu、Zn、Mn、Co、Se 1 0种矿物质元素的含量进行了检测。结果表明 ,在 3种饲料样品中Ca、Mg、Mn、Co、Se的含量都明显偏高 ,Cu、Zn基本符合要求。另外 ,P在A样中含量较高 ,C样中基本符合要求 ,而B样中略低 ;但部分元素如Ca与P、Cu与Zn、Zn与Ca、P与Cu等之间的比例严重失调。  相似文献   

狐犬瘟热继发细菌感染的诊断及防治     

罗国良  田宏宇  张海玲  闫喜军  邵西群  王凤雪  钟伟 《经济动物学报》2007,11(2):121-122

通过对一送检病狐临床症状的调查,剖检病变和细菌学检查,并进行RT-PCR检测犬瘟热病毒,确诊该狐为犬瘟热继发大肠杆菌感染,通过疫苗注射和治疗细菌感染,较好地控制了该病。  相似文献