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1.
In order to predict the body weight of grass cutters from linear body measurements, the weights and measurements of 50 intensively managed female grass cutters aged 5 months were fitted into linear, quadratic and cubic regression models. Highly significant (p?<?0.01) R 2 values ranging from 74 to 98 % were obtained indicating that all body measurements were good predictors of body weight. Although quadratic and cubic models gave slightly higher R 2 values than linear models, it is recommended that farmers should use a simple linear equation based on tail length or heart girth to predict the body weight of their grass cutters. The recommended equations are (weight in kg)?=?0.47?+?0.08 (tail length in cm) and (weight in kg)?=?0.32?+?0.07 (heart girth in cm).  相似文献   

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Abstract

The differences in body weight (BW) and measurements between the cows of today and the early 70s was evaluated and the usefulness of heart girth (HG), wither height, body length (BL) and body condition score (BCS) as predictors of the BW of modern Finnish Ayrshire cows was estimated. During the last three decades, the BW, HG and BL has increased indicating change in body conformation. The BW prediction equation based on early 70s data underestimate the BW of modern Ayrshire cows. Based on current data it is recommended to use different models to predict BW for primiparous and multiparous cows. From single measurements, HG predicted BW most accurately. Inclusion of BL in model gave slight improve in BW prediction, especially for primiparous cows. An additional term of age or days in milk (DIM) for primiparous cows and BCS or DIM for multiparous cows along with HG increased slightly the accuracy of BW prediction.  相似文献   

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《畜牧与兽医》2017,(2):6-9
为了提高测定效率,运用SPSS软件对30只赛加羚羊初生羔的体尺、体重结果进行了相关分析和通径分析,并建立了最优回归方程。结果表明:赛加羚羊初生体重(Y)与体直长(X_1)、体高(X_2)、胸深(X_3)、胸宽(X_4)、胸围(X_5)、尾长(X_6)、耳长(X_7)及管围(X_8)均呈极显著正相关(P0.01),其中体直长(X_1)和胸围(X_5)是体重(Y)的最主要决定变量。初生羔羊体直长(X_1)和胸围(X_5)对体重(Y)的最优回归方程为Y=-1.219+0.052X1+0.072X5。  相似文献   

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Changes in appetite, body mass (BM), body condition score (BCS), direct (ultrasonographic) and indirect (deuterium oxide dilution technique) measures of body fat were monitored in Welsh Mountain pony mares (n = 11, 5–19 years of age) offered ad libitum access to a complete diet (gross energy 16.9 ± 0.07 MJ/kg dry matter) for 12 weeks during summer (n = 6; 246 ± 20 kg) and winter (n = 5; 219 ± 21 kg). At the outset, each group comprised two thin (BCS 1–3/9), moderate (BCS 4–6/9) and obese (BCS 7–9/9) animals.For ponies that were non-obese at the outset, BM was gained more rapidly (P = 0.001) in summer (0.8 ± 0.1 kg/day) than winter (0.6 ± 0.0 kg/day). This was associated with a seasonal increase in dry matter intake (DMI) which became maximal (summer, 4.6 ± 0.3% BM as DMI/day; winter, 3.5 ± 0.1% BM as DMI/day) during the second month. The appetite of the obese ponies was half that reported for non-obese animals in the summer and BM remained constant irrespective of season.Body ‘fatness’ increased progressively for non-obese but not obese ponies. Body fat content was exponentially associated with increasing BCS but BCSs >6 were not useful indicators of actual body fat. Endogenous circannual mechanisms to suppress winter weight gain were insufficient to prevent the development of obesity in ad libitum fed ponies.  相似文献   

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波尔山羊生长模型及体尺体重相关分析   总被引:2,自引:1,他引:1  
用Gompertz、Bertalanffy及Logistic模型拟合4~39月龄的澳洲波尔山羊生长模型.结果表明:Logistic模型拟合效果最好(R2>O.98),公母羊生长模型分别为:w=51.59X(1十6.15×e-1.82)-1和W=52.56×(1+7.15×e2.08)-1.波尔山羊的体重与胸围呈极显著相关(P0.05).利用胸围和体高,估算体重的回归方程为:y=0.279Bug+0.893Bxw-19.28.  相似文献   

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为了解牦牛不同性别和年龄的体尺性状数据表现和相关性,实验采集146头健康的牦牛性别、年龄、体高、体斜长和胸围的数据,使用SPSS软件分析牦牛各体尺指标与体重之间相关性,并用SAS软件分析性别年龄对牦牛体尺的影响。结果表明,牦牛的体高、体斜长和胸围有显著的相关性,其中牦牛的胸围变异系数和标准差权衡数值最大,有较高的选育价值。此外,性别和年龄会对牦牛的选育产生很大影响,根据牦牛性别和年龄制定合适的选育标准。根据体尺估算不同性别和年龄的牦牛,发现体尺数据表现良好的牦牛在体重上同样表现良好。  相似文献   

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绿雁土鸡体重、体尺的相关性研究   总被引:2,自引:0,他引:2  
运用SPSS软件对180羽绿雁土鸡进行体重、体尺相关分析、通径分析,建立最优回归方程。结果表明:绿雁土鸡公鸡体重与体斜长、胸深、胸宽、胫长、胫围呈极显著正相关(P〈0.01);母鸡体重与体斜长、龙骨长、胸宽、胫围呈极显著正相关(P〈0.01)。经通径分析,公鸡体尺与体重的相关性依次为胸宽、胫长、体斜长、胸围、胸深、龙骨长、骨盆宽;母鸡依次为体斜长、龙骨长、胫围、胸宽、胫长、骨盆宽、胸深。  相似文献   

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BACKGROUND: Obesity is a risk factor for cardiovascular disease in people, but overweight and obese human heart failure patients have improved survival compared with normal--or underweight controls--the obesity paradox. The purpose of this study was to determine if there is an association of body weight and body condition with survival in dogs with heart failure. HYPOTHESIS: That body condition and changes in body weight are predictors of survival in dogs with heart failure. ANIMALS: One hundred and eight dogs with heart failure (International Small Animal Cardiac Health Council stages 2, 3a, or 3b) secondary to dilated cardiomyopathy or chronic valvular disease. METHODS: Medical records were reviewed, and data regarding initial body weight and body condition score (BCS), subsequent changes in body weight, and treatment were collected. Survival times were determined for dogs that were discharged from the hospital and lived >24 hours. RESULTS: Survival was significantly different between dogs that gained, lost, or maintained body weight over the course of their disease (P= .04), with dogs that gained weight surviving the longest. BCS and medications were not significantly associated with survival time; however, n-3 fatty acid intake was associated with longer survival time (P= .009). CONCLUSIONS AND CLINICAL IMPORTANCE: These results suggest that changes in body weight might be an important consideration in the survival of dogs with heart failure.  相似文献   

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Vertebral body osteomyelitis in the horse   总被引:1,自引:0,他引:1  
Over a 4-year period, vertebral body abscess was diagnosed in 5 young cattle. The laboratory findings in most of these cases did not suggest a diagnosis of vertebral body abscess. The most important basis for diagnosis of this condition was a thorough neurologic examination. In 4 cases, necropsy revealed abscesses in the lungs or thoracic cavity as well, suggesting that a history of pneumonia preceding paresis may favor the diagnosis of vertebral body abscess.  相似文献   

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A preputial foreign body caused severe preputial swelling and depression in a 4-year-old Shorthorn bull. Disruption of the preputial epithelium by the foreign body resulted in abscess formation lateral to the prepuce. A patent urethral fistula, probably a complication of prior fibropapilloma excisional surgery, was also detected on the distal portion of the glans penis. Foreign body removal, antimicrobial administration, and warm hydrotherapy resolved the swelling and abscess. Electroejaculation was used to extend the penis and to minimize preputial adhesions. Breeding soundness examinations were used to evaluate breeding potential.  相似文献   

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A dog that was referred to the University of Florida Veterinary Medical Center was discovered to have a bamboo skewer within the right atrium and right ventricle, traversing the tricuspid valve. The skewer was ingested approximately four months prior to referral and was partially removed via gastrotomy. The presenting complaint at the time of referral included coagulopathy, anemia and leukocytosis. A linear, hyperechoic structure was identified in the right heart during an echocardiogram. The foreign body was suspected to be a portion of the skewer that the patient had previously ingested. Cardiopulmonary bypass was performed and the foreign body was removed successfully. Complications following surgery included the development of tricuspid valve and ventricular wall thrombi, atrial flutter and amiodarone toxicity. Many indications have been described in the veterinary literature for cardiopulmonary bypass. However, to the best of the authors' knowledge, successful removal of an intracardiac foreign body with cardiopulmonary bypass has not been reported in a veterinary patient. This represents a new indication for cardiopulmonary bypass in veterinary medicine.  相似文献   

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