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1.
7 多不饱和脂肪酸对家禽的重要性 7.1 日粮成分对多不饱和脂肪酸代谢的影响 日粮不饱和脂肪的类型和含量会迅速改变鸡蛋蛋黄和快速生长鸡组织中脂质的脂肪酸组成。鱼油中的长链ω-3 PUFA(特别是EPA和DHA)对降低鸡肝脏、蛋黄、可食肉、 相似文献
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多不饱和脂肪酸(PUFA)是一种具有重要生物功能的脂类物质,除可提供能量外,还对动物的免疫功能、机体代谢和繁殖性能等具有调节作用。本文简述了PUFA对种公鸡繁殖性能的影响及其作用机理,为合理利用家禽饲粮中油脂资源和提高家禽良种产业经济效益提供理论参考。 相似文献
3.
n-3多不饱和脂肪酸(n-3PUFA)是一类具有重要生物学功能的营养物质,既可提供能量、增加细胞膜流动性,还能调节脂类代谢和机体的免疫机能等。本文从n-3PUFA的定义、生物学功能及其在家禽生产上的研究进展进行综述,以期为n-3PUFA在家禽生产中的应用提供参考。 相似文献
4.
动物体内不同部位的脂肪沉积对其胴体品质和肉品质具有重要影响。同时,人体中过多脂肪沉积会导致肥胖及相关代谢疾病的发生。因此,调控机体脂肪沉积对提高动物产品品质和改善人类健康均具有重要意义。氧化脂质(oxylipins)是一类多不饱和脂肪酸(PUFA)氧化代谢产物,越来越多研究表明,氧化脂质对机体脂肪沉积具有重要调控作用。本文总结了氧化脂质在脂肪生成、脂肪代谢、脂肪组织褐色化及产热等方面的调控作用及其可能作用机制,为深入了解PUFA调控机体脂肪沉积的作用机制及其应用提供参考依据。 相似文献
5.
亚麻籽、鱼油、微藻等功能性原料富含大量n-3多不饱和脂肪酸(n-3 PUFA),常添加到家禽饲粮中富集n-3 PUFA禽产品。不同原料具有不同的脂肪酸组成及其他营养物质,在养殖中对家禽生长发育会产生不同的影响。本文从家禽生产性能、禽产品品质、n-3 PUFA及其他成分含量、感官评价、氧化稳定性等方面,对利用不同原料富集n-3 PUFA保健禽产品的研究进行了综述,为不同功能性原料更好地应用于家禽养殖生产提供科学依据。 相似文献
6.
多不饱和脂肪酸(PUFA)是影响动物组织脂类代谢的关键因子。本文综述了PUFA对动物脂类代谢的影响,并从脂类代谢相关基因的表达及其信号通路、脂肪细胞的数量、脂肪细胞因子分泌、参与表观遗传学修饰和改变瘤胃微生物组成的角度综述了其可能的影响机制,为深入探讨PUFA对动物脂类代谢的影响机制及通过PUFA调控动物的脂类代谢提供了理论依据。 相似文献
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多不饱和脂肪酸是一类具有重要生物学功能的物质，主要包括ω-3和ω-6系列。本文就PUFA的全程代谢、营养功能及其在家禽生产中的应用作一综述。 相似文献
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多不饱和脂肪酸（Polyunsaturated fatty acids，PUFA）作为细胞膜磷脂、胆固醇酯和血浆脂蛋白的重要成分．在体内代谢转化过程中有重要的生理功能，能够调节机体的脂质代谢，治疗和预防心脑血管疾病，促进生长发育，此外对抗癌症、 相似文献
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多不饱和脂肪酸（PUFA）是一种具有独特生物功能的物质，在机体免疫、脂质代谢、基因表达、细胞膜功能等方面有着重要的作用，对人和畜禽的健康有着重要的影响。本文综述了多不饱和脂肪酸主要的生物学功能，在养猪生产上的应用以及富含多不饱和脂肪酸猪肉产品的研究进展。 相似文献
10.
胆碱是家禽保持健康、生长发育必需的营养素,它在细胞膜磷脂合成、甲基组代谢、神经递质传递和肝脏脂质转运等方面发挥重要作用.饲粮中胆碱缺乏导致家禽生长发育迟缓和采食量下降.本文综述了家禽胆碱缺乏的临床特点、造成胆碱缺乏的主要因素以及胆碱缺乏对家禽健康和生长的影响及可能的机理,并且展望了胆碱在家禽生产上的应用. 相似文献
11.
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
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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
15.
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 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
17.
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
18.
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
19.
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
20.
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
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