生态畜牧业与畜牧业的可持续发展

论述了生态畜牧业在畜牧经济中的地位和作用，分析了当前畜牧业的现状与存在的问题，提出了发展生态畜牧业是实现生态系统良性循环和畜牧业可持续发展的必然选择。     

中国有机畜牧业产业化发展研究

介绍了中国畜牧业发展现状,分析了中国畜牧业发展存在的问题,指出发展有机畜牧业是中国实施畜牧业可持续发展的重要举措,并提出发展中国有机畜牧业的若干建议。     

畜牧业可持续发展战略的理论思考

畜牧业的可持续发展作为农业可持续发展乃至全球经济可持续发展的重要组成部分,近年来愈来愈引起世人的重视。本文以目前畜牧业发展过程中暴露的主要问题为着眼点,分别从资源承载和系统功能整合两个方面对畜牧业发展存在的深层次问题进行了分析探讨。以期对我国畜牧业的可持续发展研究能有所启迪。     

我国畜牧业可持续发展的问题与对策

本文从可持续发展的概念出发，介绍了我国畜牧业的发展现状、存在的问题，并针对这些问题提出了从开发饲料资源、保护物种多样性、重视畜产品安全、发展生态畜牧业、调整畜牧业结构、积极应对WTO的挑战等方面来实现我国畜牧业的可持续发展。     

我国畜牧业可持续发展的问题与对策

本文从可持续发展的概念出发,介绍了我国畜牧业的发展现状、存在的问题,并针对这些问题提出了从开发饲料资源、保护物种多样性、重视畜产品安全、发展生态畜牧业、调整畜牧业结构、积极应对WTO的挑战等方面来实现我国畜牧业的可持续发展.     

畜牧业可持续发展战略的理论思考

畜牧业的可持续发展作为农业可持续发展乃至全球经济可持续发展的重要组成部分,近年来愈来愈引起世人的重视.本文以目前畜牧业发展过程中暴露的主要问题为着眼点,分别从资源承载和系统功能整合两个方面对畜牧业发展存在的深层次问题进行了分析探讨.以期对我国畜牧业的可持续发展研究能有所启迪.     

云南迪庆藏族自治州草地畜牧业现状及可持续发展前景

迪庆州发展草地畜牧业有优越的条件和基础。当前制约迪庆州草地畜牧业可持续发展的主要问题有：草地及家畜品种退化、草畜矛盾突出、畜产品生产力水平及商品化程度低、与草地畜牧业相关的配套机制不健全等。本文从草地可持续发展的角度,提出了实现迪庆州草地畜牧业可持续发展的建议。     

生态畜牧业是青海省畜牧业可持续发展的必然选择

论述了生态畜牧业在青海畜牧业经济中的地位和作用,分析了当前畜牧业的现状与存在的问题,提出了发展生态畜牧业是青海省实现生态系统良性循环和畜牧业可持续发展的必然选择。     

浅谈青海草地畜牧业可持续发展

通过对青海省畜牧业的基本情况进行了概述,分析了青海省草地畜牧业可持续发展的现状及存在的问题,并提出了相应的发展对策。     

试论我国生态畜牧业及其可持续发展

本文提出了生态畜牧业的概念,分析了我国目前畜牧业的现状以及存在的问题,确定了生态畜牧业是我国畜牧业可持续发展的必然选择,提出了发展生态畜牧业的措施.     

Heartworm in dogs in Canada in 1984

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.

     

Heartworm in dogs in Canada in 1983

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.

     

Heartworm in dogs in Canada in 1991

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.     

Heartworm in dogs in Canada in 1985

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.

     

Heartworm in dogs in Canada in 1988

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%).     

Heartworm in dogs in Canada in 1989

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.

     

Heartworm in dogs in Canada in 1987

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%).     

Heartworm in dogs in Canada in 1986

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.