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1.
五指山猪(WZSP)近交系生长曲线分析与拟合研究 总被引：3，自引：0，他引：3
本文先后对WZSP近交系F158窝共58头个体进行了为期180d的观测试验。依据对近交第15代WZSP 1-180日龄的体重及体长、体高、胸围、管围4项体尺性状数据，我们进行了生长曲线分析和非线性曲线拟合研究，对指数模型、Logistic模型和Gompertz模型分别进行拟合，结果表明Logistic模型拟合效果较好。据3种拟合曲线的拟合度可知，Logistic曲线能较好地拟合WZSP的生长曲线（公猪和母猪体重、体长、体高、胸围和管围的拟合度R^2分别为0．9854、0．9277、0．9691、0．9521、0．9651和0．9914、0．9544、0．9823、0．9061、0．9636），拟合曲线模型中代表极限体重的参数K值母猪明显高于公猪，其他参数也略有差异。研究结果表明，Logistic曲线模型适用于描述WZSP近交系的体重及体尺生长发育规律。 相似文献
2.
《现代畜牧兽医》2017,(3)
经测定鲁西黑头羊3月龄断奶体重公羔32.58±3.21 kg,母羔30.78±3.03 kg。6月龄公羊体重49.39±4.58 kg,母羊45.60±4.39 kg,分别达到成年体重的48.05%、59.39%。周岁公羊体重87.26±5.42 kg,母羊65.12±6.46kg,分别达到成年体重的84.90%和84.81%。成年公羊体重102.78±9.50 kg,母羊体重76.78±7.39 kg。周岁公羊体高、体长、胸围和管围分别达到成年羊体尺的88.24%、93.92%、92.92%和91.59%;周岁母羊分别达到成年体尺的95.47%、95.04%、91.99%和96.23%。成年公羊体高83.87±7.48 cm,体长98.68±4.57 cm;成年母羊体高70.41±4.41cm,体长88.49±5.38 cm。整体分析,出生至六月龄体重呈直线上升趋势,公羊生长趋势强于母羊,8月龄后体重生长速度减缓;各项体尺生长发育成熟顺序,公羊依次为胸围、体长、体高;母羊依次为体高、体长、胸围。 相似文献
3.
波尔山羊及波唐杂交一代山羊生长发育规律研究 总被引：2，自引：0，他引：2
采用Compertz模型分别拟合了纯种波尔山羊及波尔与唐山奶山羊杂交一代 (波唐一代 )山羊初生至 7月龄的体重、体长、体高和胸围四个指标的生长曲线 ,并根据模型计算了各指标的指数生长率。结果表明 ,Compertz模型能够很好地拟合山羊体重及体尺的生长曲线 ,所有曲线的拟合度均在 0 .989以上。两种山羊在生后时期均以体重的生长强度明显高于体尺。纯种波尔山羊各体尺的生长强度变化在 2月龄以前为体长 >胸围 >体高 ,2～ 3月龄则为胸围 >体长 >体高 ,4月龄及以后为胸围 >体高 >体长。而波唐一代山羊 4月龄前为体长 >胸围 >体高 ,4月龄为体长 >体高 >胸围 ,5月龄以后体高的生长强度高于其他两个体尺指标的生长强度。同类型公羊比母羊具有较快的生长强度 ,纯种波尔山羊不同性别间的生长速度差异明显大于波唐一代不同性别间的差异。纯种波尔公羊比波唐一代公羊具有更大的生长优势 ,纯种波尔母羊在后期才表现出比波唐一代母羊较快的生长优势 相似文献
4.
本研究通过对湖羊母羊的体高、体长、胸围、管围与湖羊羔羊出生、1月龄、断奶三个阶段的体重进行相关性分析,研究适合湖羊早期选种的生长发育指标。结果显示,湖羊羔羊在出生、1月龄和断奶时的体高、体长、胸围、管围与体重之间有一定的正相关,湖羊母羊的体高、体长、胸围、管围与羔羊在出生、1月龄和断奶时的体重之间也有一定的正相关;相关系数大于0.6的体尺指标有体高、体长和胸围,其中胸围与体重之间的相关系数最大、相关性最好。以上结果表明,选种时湖羊母羊和羔羊的体高、体长、胸围可以作为参考依据,而胸围可作为主要依据。本研究将为湖羊的早期选育提供理论参考。 相似文献
5.
为了探析非遗传因素对鲁中肉羊不同生长阶段体尺体重性状的影响,采用莱芜市赢泰有机农业科技发展有限公司2015—2019年的15 040条鲁中肉羊的生产性能数据,用最小二乘方差分析和多重比较分析了出生年份、出生季节、性别对初生、3月龄、6月龄、周岁、成年阶段鲁中肉羊体重、体高、体长、胸围、胸宽、胸深、管围的影响。结果表明,出生年份对鲁中肉羊初生、3月龄、6月龄、成年阶段的体重、体高、体长、胸围、胸宽、胸深、管围均有极显著影响,出生年份对周岁阶段的体重、体高、胸围、胸宽、胸深、管围有极显著影响。出生季节对初生阶段的体重、体长、胸宽、胸深有极显著影响;出生季节对3月龄阶段的体重、体高、体长、胸围、胸宽、胸深和管围均有极显著影响;出生季节对6月龄阶段的体重、体高、胸围、胸宽、胸深、管围有极显著影响;出生季节对周岁体重、体高、体长、胸围、胸宽也有极显著影响;出生季节对成年阶段的体长有极显著影响。性别对鲁中肉羊初生、3月龄、6月龄、周岁、成年阶段的体重、体高、体长、胸围、胸宽、胸深、管围均有极显著影响。本文通过对影响鲁中肉羊不同生长阶段的非遗传因素进行科学合理分析,为鲁中肉羊遗传参数估计和遗传进展工... 相似文献
6.
为了了解藏羊的生长发育规律,试验采用Logistic、Gompertz和Von Bertalanffy三种非线性模型对0～6月龄藏羊的体重和体尺进行生长曲线拟合与分析,并探讨初生与断乳期羔羊体质的关联性。结果表明:藏羊在0～6月龄时,不同性别间体重、体尺增长均无显著差异(P0. 05); Von Bertalanffy模型对体重、体长和胸围的拟合度最高,Gompertz模型对体高的拟合效果最好;体重的时间拐点为1. 52月龄,体重的生长拐点为8. 98 kg;体长、体高、胸围的生长拐点为0. 23～0. 27月龄; 3月龄羔羊的体重与初生体重呈极显著正相关(P0. 01),3月龄公羊体高与初生体高,以及3月龄母羊胸围与初生胸围均呈显著正相关(P0. 05)。说明哺乳期是羔羊生长的关键时期,初生体质对断乳期体质具有显著影响。 相似文献
7.
新疆地区西门塔尔犊牛生长发育规律分析 总被引：1，自引：0，他引：1
为探讨新疆地区西门塔尔犊牛的生长发育规律,本研究对2011—2016年新疆呼图壁种牛场0~6月龄新疆地区西门塔尔犊牛的体重、体尺进行分析。结果表明:新疆地区西门塔尔犊牛体重增重规律与其他品种相似,体尺累积生长平缓,同时西门塔尔牛具有早期发育快的特点;绝对生长曲线总体呈上升趋势,而相对生长曲线呈下降趋势;公犊牛6月龄体重与体高、体斜长、腿围、管围存在极显著正相关(P0.01),体重与体高的相关系数最高,为0.62;母犊牛6月龄体重与体高、体斜长、胸围、腿围、管围存在极显著正相关(P0.01),其中体重与胸围的相关系数最高,为0.81;表明性别是影响体重与体尺相关性的重要因素。新疆地区西门塔尔牛分为乳肉兼用和肉乳兼用型,其犊牛的生长发育对后期牛的生产性能有重要影响,因此要注重犊牛时期的饲喂。 相似文献
8.
对南方某警犬基地史宾格犬的体尺性状与生长发育规律进行了研究。结果表明:史宾格犬在1月龄期管围发育迅速,头长和胸围生长较快;出生后的前6个月,体重、体尺增长较快,至12月龄时体重和体尺增长基本停止,公犬体成熟时间稍晚于母犬;体长与体高、胸深、胸围、荐高、头长呈极显著正相关(P<0.01);体高与胸深、胸围、荐高呈极显著正相关(P<0.01);荐高与头长、管围呈显著正相关(P<0.05);头长与管围呈显著负相关(P<0.05);F1代成年公母犬的体重、体长、胸深、胸围与原代有极显著差异(P<0.01)。 相似文献
9.
《中国草食动物科学》2021,(4)
为探究沂蒙黑山羊和鲁波山羊在育肥期生长性能的差异,选取3月龄断奶的沂蒙黑山羊13只、鲁波山羊16只开展育肥试验,预试期21 d,正试期90 d,分别于育肥第0、30、60和90天测定体重、体高、体长、胸围、胸宽、胸深、管围等生长发育指标。结果表明,在育肥期间,鲁波山羊体重总增量、平均日增重,体高、体长、胸围和胸深增长量均极显著高于沂蒙黑山羊(P0.01),胸宽和管围增长量两个品种之间无显著性差异(P0.05)。沂蒙黑山羊体重的阶段增长量呈上升趋势,体高、体长及胸围累计增长量均超过7 cm,而鲁波山羊体重的阶段增长量呈下降趋势,体高、体长及胸围累计增长量均超过11 cm;3个试验阶段中不同体尺指标在沂蒙黑山羊与鲁波山羊之间总体表现出与体重增长量一致的生长趋势。整体来看,鲁波山羊在育肥期的生长速度快于沂蒙黑山羊。 相似文献
10.
试验对0~120日龄新疆也木勒白羊羔羊体尺指标、体重生长发育规律进行了分析,旨在为也木勒白羊品种选育提供理论依据。选择222只也木勒白羊初生羔羊,每30 d对其体尺、体重进行测量,直至120日龄。结果显示,也木勒白羊公、母羔早期各月龄体重、体尺累积增长差异极显著（P<0.01）,公羔生长发育较母羔快,公、母羔30~60日龄生长速度最快,30~60日龄公羔平均日增重（ADG）较母羔多6.8 g/d;体尺指标分析结果显示,体长、体高、管围、脂臀宽和脂臀厚在0~30日龄增长最快,胸围和脂臀长在30~60日龄增长最快,公、母羔脂臀长指标在90~120日龄差异明显;120日龄断奶羔羊体尺与体重表型相关性分析结果显示,羔羊胸围与体重的相关系数最大,脂臀长与体重的相关系数最小。通径分析结果显示,羔羊胸围对体重的直接作用较大,体高、体长、脂臀长和脂臀宽主要通过间接作用影响体重。公羔管围对体重的直接作用大于间接作用,母羔管围对体重的间接作用大于直接作用。 相似文献
11.
Owen J Slocombe D McMillan I 《The Canadian veterinary journal. La revue veterinaire canadienne》1986,27(9):324-328
In late December 1985, 1485 institutional veterinarians and small and mixed animal clinics across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1985 and 44% of them responded. Veterinarians reported that 137,300 dogs were blood-tested to check for microfilariae and 1210 dogs were found with heartworm. Another 36 dogs were amicrofilaremic but diagnosed with heartworm disease to give the total number diagnosed in 1985 as 1247 (0.91%).
Heartworm was reported from all provinces except Prince Edward Island, Newfoundland and Saskatchewan but most (1126) of the cases were in Ontario. Southwestern Ontario continued to be the primary focus of the infection in Canada. From Quebec, 91 cases were reported mostly from and around Montreal. From Manitoba, 19 cases were reported from Winnipeg and surrounding areas. Heartworm was found most frequently in companion dogs over three years of age maintained mainly outdoors in rural areas. About 28% of the cases were observed with clinical signs of heartworm disease and 78% had a history of not having left Canada.
相似文献12.
Slocombe JO McMillan I 《The Canadian veterinary journal. La revue veterinaire canadienne》1989,30(6):504-508
In late November 1988, 1581 small and mixed animal clinics and institutional veterinarians across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1988, and 46% of them responded. Veterinarians reported that 181,577 dogs were blood-tested for heartworm disease and 367 dogs were found with D. immitis microfilariae. Another 60 dogs were amicrofilaremic but diagnosed with heartworm disease to give the total number of cases diagnosed in 1988 as 441 (0.24%). 相似文献
13.
Slocombe JO McMillan I 《The Canadian veterinary journal. La revue veterinaire canadienne》1985,26(10):323-327
In late December 1984, 1853 institutional veterinarians and small and mixed animal clinics across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1984 and 35% of them responded. Veterinarians reported that 97,794 dogs were blood-tested to check for microfilariae and 1417 dogs (1.45% of those tested) were found with heartworm. Another 34 dogs were amicrofilaremic, but were diagnosed as having heartworm disease, to give the total number diagnosed in 1984 as 1451 (1.48%). Heartworm was reported from all provinces except Prince Edward Island and Newfoundland but most (1310) of the cases were in Ontario. In Quebec, 126 cases were reported mostly from west of Montreal.
Heartworm was found most frequently in companion dogs over three years of age maintained mainly outdoors in rural areas. About 27% of the cases were observed with clinical signs of heartworm disease and 72% had a history of not having left Canada. Southwestern Ontario continued to be the primary focus of the infection.
相似文献14.
15.
Slocombe JO Villeneuve A 《The Canadian veterinary journal. La revue veterinaire canadienne》1993,34(10):630-633
In late November 1991, 1883 clinics in Canada were sent a questionnaire to assess the status of Dirofilaria immitis in dogs in 1991 and there was a 60.0% response. There were 344,031 dogs tested for heart-worm (HW), 627 were found infected and the prevalence of HW infection was 0.18%. There were 417 dogs with HW in Ontario, 116 in Manitoba, 38 in Quebec, 53 in British Columbia, three in Alberta, and one in Nova Scotia. In British Columbia, all of the infected dogs but one were from the Okanagan valley which, as from 1991, is a new focus of infection in Canada. Most dogs with HW had not been on preventive medication in 1990, and the prevalence among dogs tested and unprotected was 0.59%. That prevalence was considerably higher in endemic areas. Companion dogs, over three years of age and maintained primarily outdoors in rural areas, were most frequently infected. One cat was diagnosed with D. immitis and 33 dogs had Dipetalonema reconditium. 相似文献
16.
In late November 1989, 1732 clinics and institutional veterinarians were sent a questionnaire to assess the status of Dirofilaria immitis, and 51.7% responded. Of 247,716 dogs tested, 394 had D. immitis microfilariae and 51 were amicrofilaremic for a total of 445 cases and heartworm prevalence of 0.17%. Most (408) of these dogs had no preventive medication and the prevalence among dogs tested and unprotected was 1.01%. That prevalence was considerably higher in endemic areas. Thirty-seven dogs with heartworm had preventive medication. Heartworm was most frequent in companion dogs over three years of age maintained outdoors in rural areas. About 75% of the cases had never left Canada, 26% had clinical signs and 125 were not treated.
Heartworm was reported from British Columbia, Manitoba, Ontario, Quebec, Nova Scotia and Newfoundland, but 383 cases were in Ontario. South-western Ontario was the primary focus of infection. There were 33 cases in Quebec and 24 in Manitoba, mainly found in and around Metropolitan Montreal and Winnipeg respectively.
相似文献17.
Slocombe JO McMillan I 《The Canadian veterinary journal. La revue veterinaire canadienne》1988,29(8):641-646
In late November 1987, 1246 institutional veterinarians and small and mixed animal clinics across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1987, and 50% of them responded. Veterinarians reported that 165,428 dogs were blood tested for heartworm disease and 511 dogs were found with D. immitis microfilariae. Another 78 dogs were amicrofilaremic but diagnosed with heartworm disease to give the total number of cases diagnosed in 1987 as 589 (0.35%). 相似文献
18.
Owen J Slocombe D McMillan I 《The Canadian veterinary journal. La revue veterinaire canadienne》1987,28(8):491-495
In late December 1986, 1224 institutional veterinarians and small and mixed animal clinics across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1986; 46% of them responded. Veterinarians reported that 150,989 dogs were blood-tested for microfilariae and 869 dogs were found with heartworm. Another 65 dogs were amicrofilaremic but diagnosed with heartworm disease and one was found with heartworm at necropsy to give the total number diagnosed in 1986 as 935 (0.62%).
Heartworm was reported from Manitoba, New Brunswick, Ontario and Quebec, but most (810) of the cases were from Ontario. South-western Ontario continued to be the primary focus of the infection in Canada. There were 103 cases reported from Quebec, mostly from and around Montreal, and 21 cases from Manitoba, from Winnipeg and surrounding areas. Heartworm was found most frequently in companion dogs over three years of age maintained mainly outdoors in rural areas. About 33% of the cases were observed with clinical signs of heartworm disease and 81% had a history of not having left Canada.
相似文献19.
20.
Slocombe JO McMillan I 《The Canadian veterinary journal. La revue veterinaire canadienne》1984,25(9):347-350
In late December 1983, 2 800 veterinarians across Canada were sent a questionnaire in order to assess the status of heartworm disease in Canada in 1983 and 26% of them responded. Veterinarians reported that 59 504 dogs were blood-tested to check for microfilariae and 771 dogs (1.30% of those tested) were found with Dirofilaria immitis. Heartworm disease was diagnosed in all provinces except New Brunswick and Newfoundland but most (733) of the cases were in Ontario.
Heartworm disease was found most frequently in companion dogs over three years of age maintained mainly outdoors in rural areas. About 31% of the cases were observed with clinical signs of heartworm disease and 64% had a history of not having left Canada. Southwestern Ontario continues to be the focus of the infection and most of the dogs there had not left the province previously.
相似文献