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达赉湖保护区水鸟生境利用研究 总被引:2,自引:0,他引:2
2007年3~11月,通过样带法对内蒙古达赉湖自然保护区内水乌生境利用进行了研究。研究表明,达赉湖保护区不同种水乌的生境利用显著不同,鹳形目、鸥形目和鹈形目鸟类主要选择在河漫滩草甸,鸻形目鸟类主要选择泥岸沼泽,鹤形目和鸊(?)目鸟类主要选择浅水植被区,雁形目鸟类主要选择深水区。 相似文献
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随着猪、鸡市场的日益饱和,以及人们生活水平的不断提高,水禽饲养成为人们投资的焦点,为了满足水禽养殖迅速发展的需求,对水禽营养需要的研究已成为当务之急。对水禽饲料代谢能的研究成为鸡代谢能测定标准化之后的又一热点。本文对水禽代谢能测定中常见的测定方法的选择、试验对象的选用及过渡期饲养和实验过程中的粪便收集的问题进行了讨论,并针对问题,从实用出发,提出了建议。 相似文献
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如何提高水禽禽流感(AD免疫防控的效果,一直是临床兽医工作者所关注的问题。本文根据“水禽禽流感的免疫防控关键技术研究”所获得的主要成果,从疫苗质量控制、免疫程序制订与实施、免疫效果监测、卫生与饲养管理措施等重要方面陈述了水禽AI防控的技术要点,望对提升水禽AI的防控水平、增加水禽养殖业收益方面有所帮助。 相似文献
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红碱淖湿地遗鸥及水鸟的种群和分布研究 总被引:2,自引:0,他引:2
红碱淖湿地位于中国候鸟迁徙的主要路线上,水鸟分布较为集中,是遗鸥、大天鹅等珍稀水鸟的重要迁徙停歇地和繁殖地。通过对红碱淖湿地遗鸥及水鸟的种群和分布进行了8 a的实地调查和研究,统计分析了红碱淖2001~2007年的遗鸥和水鸟的种群数量动态变化。研究结果表明2007年红碱淖湿地的遗鸥繁殖巢数达5 036巢,种群数量10 072只,已成为全球最大遗鸥种群,在此基础上,还总结了红碱淖湿地7目14科55种水鸟的分布和保护价值,为水鸟的保护和管理提供了依据,对红碱淖湿地遗鸥及水鸟的保护具有重要意义。 相似文献
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We analysed population trends of 24 wildfowl species in Mexico. Wildfowl numbers peaked during the early 1980s; lowest counts were recorded in 1997. Total wildfowl numbers (all species combined) and duck numbers (duck species combined) showed significant short-term (1981-2000) declines, while geese (goose species combined) showed a significant long-term (1961-2000) increase. Six wildfowl species suffered significant long-term declines, while four showed increases. During 1981-2000, 11 species declined, but none had significant increases. Redhead (Aythya americana), Mexican duck (Anas diazi), northern pintail (A. acuta) and black brant (Branta bernicla nigricans) should be given high conservation priority because of the high proportions of their North American populations in Mexico. Declining numbers of the later two species should trigger further investigation into the possibility of assigning them legal protection status. Other species with apparent declines in numbers should also be more closely monitored. For setting hunting limits in the country, the population status of each species should be accounted for, as well as the condition of breeding populations the previous spring. Other species with poor data or combined counts should be targeted for basic population studies. We suggest that the mid-winter counts be expanded to cover non-surveyed areas and conducted every year to more precisely detect wildfowl population change. Integrated to a site-selection analysis, the information presented here can provide the basis for a wildfowl conservation strategy in Mexico. 相似文献