共查询到19条相似文献,搜索用时 125 毫秒
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本研究是对4窝0~45日龄的22只罗威纳仔犬全天24h以监控录像的方式记录犬舍内仔犬的行为,定量分析各种行为每日出现的频率、时间和每次的持续时间。研究表明,仔犬的睡眠行为每日出现的频率和时间随仔犬日龄增加而逐渐下降,仔犬的环境适应能力、衔取能力、运动能力等行为是随仔犬日龄增加而增强,等级意识是在仔犬有独立能力时开始形成的。 相似文献
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罗威纳犬是我国警方新引进的警用犬种,原产于德国,具有优良血统、历史悠久,是在世界工作犬品种中享有盛誉的著名犬种:它性格勇敢、警觉、聪明、安静而自信,有强烈的工作愿望并能吃苦耐劳、适应性极强,被欧美许多国家广泛应用于治安、救护、追踪、搜索及海关缉私工作中,亦是良好的伴侣犬。 相似文献
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本试验用罗威纳犬作父本、本地犬作母本进行杂交。结果表明,交配受低率低于本地犬,繁殖率、断奶、成活率高于本地犬,杂交后代的生长速度和看家护院性能良好。 相似文献
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罗威纳犬是非常机警、性格坚强的犬,它具有兴奋活泼,衔取欲及占有欲强等特点,所以在日常的训练当中,应正确地把握其行为特征,因犬制宜,扬长避短,用科学训练的方法培养犬的能力:可以在训犬工作中达到事半功倍的效果. 相似文献
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罗威纳犬是非常机警、性格坚强的犬,它具有兴奋活泼,衔取欲及占有欲强等特点,所以在日常的训练当中,应正确地把握其行为特征,因犬制宜,扬长避短,用科学训练的方法培养犬的能九可以在训犬工作中达到事半功倍的效果。 相似文献
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罗威纳犬(Rottweiler)又称罗特威勒犬,系世界著名的犬种,由于其体型高大强悍,身体丰满匀称,性情稳重镇静,服从性能良好而广受世界各国养犬者青睐。因其机警聪慧,力大威猛,耐力持久,易于训练,工作性能好而被广泛用于护卫警戒、巡逻执勤、追捕擒凶、防暴制暴,也用于搜索追踪等。2000年以来,公安部先后引进了30头种犬,由公安部南昌警犬基地进行警用犬繁殖、训练和使用研究。现已作为装备配发给全国部分省(市、区)公安机关,并在打击犯罪中发挥重要作用。 相似文献
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R. Beuing CH. Mues B. Tellhelm G. Erhardt 《Zeitschrift für Tierzüchtung und Züchtungsbiologie》2000,117(6):375-383
A total of 2114 scores of elbow arthrosis from the official screening programme of the German Rottweiler Breeding Association (ADRK) were analysed in respect of prevalence and genetic disposition. 45.8% showed no signs of arthritis, 40.6% were scored in Grade 1 with minor osteophytes and 13.6% were affected by arthritis of clinical relevance (Grade 2 and 3). REML estimates showed a heritability of 28% and a litter variance of 6.4%. The only significant environmental fixed effect was gender. 39.1% of the male and 51.5% of the female were free from ED which corresponds with 19.2% of the male and only 8.8% of the female in the critical ED classes of Grade 2 and 3. Differences between the years of examination could be explained by genetic gain. Month of birth as well as age at examination, in the range covered by this study, was not significant. It was stated that the effect of bodyweight should be tested before starting a breeding programme. 相似文献
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随着全国各级公安机关大规模配发巡逻犬用于城区巡逻,在社会面的控制及预防犯罪中起到较好的震慑作用,如何提升其实战效能则成为一个重要课题。切实解决巡逻犬在实战中放的问题是提升警犬使用效能、服务一线警务工作的一种思路。巡逻犬佩戴口笼出勤不 相似文献
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Katherine A Houpt Steven Zicker 《Veterinary Clinics of North America: Small Animal Practice》2003,33(2):405-16, vii-viii
The effects of dietary deficiency, including both malnutrition and deficiency of specific vitamins, on behavior is discussed with special emphasis on the growing kitten and puppy. The effect of caloric restriction on behavior is reviewed so that owners can be advised what to expect when their dog is placed on a reducing diet. The evidence for influence of dietary protein and tryptophan on canine aggression is presented. The effect of special diets on canine cognitive dysfunction is reviewed. 相似文献
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C A Osborne 《Veterinary Clinics of North America: Small Animal Practice》1986,16(2):251-260
Canine uroliths may form rapidly or slowly, progressively increase or decrease in size, or become inactive. Associated clinical signs are usually dependent on their locations but may also be influenced by underlying causes. Recurrence of uroliths is unpredictable, being influenced by several variables. Recurrent uroliths are usually, but not invariably, similar in mineral composition to those present during the initial episode. 相似文献
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Urine samples were collected from 32 male dogs and examined for the presence of spermatozoa. Twenty-eight dogs were found to have spermatozoa in their urine, indicating that spermatogenesis is occurring normally. 相似文献
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犬是我们最亲近的朋友,然而我们常常误解它的行为。例如我们通常以为犬是因为内疚或不安才去破坏东西,然而其真正原因却是它受到了惊吓。当犬处在焦虑、 相似文献
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一、外部刺激在犬生存的环境中,经常会受到来自外部因素的影响而改变自己的行为。这种情况最为常见,表现为各种反射性活动。如爪子触碰火后会立 相似文献