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Analysis on the Status of Farmers, Agriculture and Countryside, and Development Strategies and Measures in Tibet Autonomous Region 被引量:4
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作者 ZHONGXianghao LIXiangmei PENGChuanzhong 《Journal of Mountain Science》 SCIE CSCD 2004年第2期175-182,共8页
Coordinated and sustainable development of farmers, agriculture and countryside (FAC) is key to realize the national objective of comprehensively developed well-off society. Since the peaceful liberation of Tibet, out... Coordinated and sustainable development of farmers, agriculture and countryside (FAC) is key to realize the national objective of comprehensively developed well-off society. Since the peaceful liberation of Tibet, outstanding achievements have been made in FAC work. However, compared with East and Middle China, there still exists a big gap. The farmers’ net income per capita in 2001 was 1,404 yuan, 962 yuan lower than the nation’s average. In late 90’s the farmers’ income growth slowed down. Agricultural industrialization is at low level, technologies play a small role in agricultural development, rural infrastructure is weak, the rural grass root organization is much underdeveloped, and construction of towns is behind the other regions of China. Based on the problems of FAC development there, this paper proposes FAC development strategies and measures for accelerating rural development in Tibet. 展开更多
关键词 农业经济 农民收入 人均收入 农业产业化
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Dynamic Changes of the Farmers and Herdsmen’s Income Sources in the Tibet Autonomous Region
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作者 LIXiang-mei LIUHua +1 位作者 PENGChuan-zhong ZHONGXiang-hao 《Wuhan University Journal of Natural Sciences》 EI CAS 2005年第4期745-750,共6页
Based on the Tibet Autonomous Region's statistic yearbooks and the data fromthe two household surveys in 2002 and 2004, this paper has comprehensively analyzed the pattern ofchanges on the farmers and herdsmen'... Based on the Tibet Autonomous Region's statistic yearbooks and the data fromthe two household surveys in 2002 and 2004, this paper has comprehensively analyzed the pattern ofchanges on the farmers and herdsmen's income sources in the Tibet Autonomous Region since 1990 withthe main findings as follows; (1) The change of income from the labor payment is the fastest; (2)There is no regular pattern of income variation for the household economic activities, the farmersand herdsmen's household incomegeneration projects are impacted by the elements like prices andreturns, and there is a lack of appropriate direction; (3) The income structure of labor paymentshows that the income from the farmers and herdsmen working outside grows fastest; (4) The incomefrom the farmers and herdsmen's labor payment correlate positively to their net income per capita;(5) From the perspective of the variation by region, labor payment income has changed fastest in thecounties of Rutok, Nyerong and Khangmar comparedthe data from the household survey in 2002 withthat of 2004. 展开更多
关键词 the tibet autonomous region rural residents income source
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Analysis of Income Structure of Farmer (Herdsman) of the Tibet Autonomous Region
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作者 Li Xiang-mei, Liu Jian-Zhong Xiang-haoInstitute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, Sichuan. China 《Wuhan University Journal of Natural Sciences》 CAS 2003年第03B期926-934,共9页
Based on the sampling data this paper analyzes income structure of farmer (herdsman) of the Tibet Autonomous Region, including source, characteristics and cash. Situation of income structures and income sources of the... Based on the sampling data this paper analyzes income structure of farmer (herdsman) of the Tibet Autonomous Region, including source, characteristics and cash. Situation of income structures and income sources of the farmers in different areas (agricultural, animal husbandry areas and half agricultural and half animal husbandry areas etc. ) was approached. The following features were found through an analysis of surveyed data: (1) In Tibetan peasant household goods and products instead of money. disposable income and cash are very little. (2) The variety index of income is higher in the out skirt than it in rural, the index has a direct bearing on net income. (3) The income ways are simplistic and out-date in the poor households, they have no ability to resist and guard a-gainst any risk, it is very difficult to increase their receipts. (4) The living standard in agricultural areas is better than in pastoral areas, it is the worst in half agriculture and half animal husbandry areas. 展开更多
关键词 the tibet autonomous region farmer (herdsman) income structure
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Status and Protection of National Wetland Parks in the Tibet Autonomous Region
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作者 YOU Yuhui HU Jingkuo XING Zhen 《Journal of Landscape Research》 2019年第1期73-78,86,共7页
This paper summarized the status, the brief history of the construction and development of national wetland parks in the Tibet Autonomous Region, and proposed corresponding measures for their later protection and deve... This paper summarized the status, the brief history of the construction and development of national wetland parks in the Tibet Autonomous Region, and proposed corresponding measures for their later protection and development, in order to realize the sustainable development of national wetland parks. 展开更多
关键词 tibet autonomous region NATIONAL WETLAND parks STATUS and PROTECTION
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Tibet: Nearer and Nearer——An Interview With Radi,chairman of the Standing Committee of the People's Congress of Tibet Autonomous Region
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《China Today》 2001年第5期8-10,共3页
关键词 In An Interview With Radi chairman of the Standing Committee of the People’s Congress of tibet autonomous region Nearer and Nearer tibet
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The Tibetan Opera Troupe of Tibet Autonomous Region
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《China & The World Cultural Exchange》 1996年第5期36-36,共1页
The Tibetan Opera Troupe of TibetAutonomous Region was established in1960 on the basis of the JormulongTroupe.After sorting and revising thetraditional Tibetan operas,the troupe haspresented some traditional items,suc... The Tibetan Opera Troupe of TibetAutonomous Region was established in1960 on the basis of the JormulongTroupe.After sorting and revising thetraditional Tibetan operas,the troupe haspresented some traditional items,such asPrincess Wencheng,King Norsang,NangsaVibum,Sukyi Nima,Drooa Sangmu,BemaVenba and Chimi Gundan.While revisingtraditional programs,the troupe has ad-ded stage props,makeup,lighting and aband for musical accompaniment.Thishas increased the artistic appeal of theTibetan opera,making it a more compre-hensive stage art.The revised version of Nangsa Vibumwon an award from the Ministry of Cul-ture at a national theatrical performancefestival,and the playscript of Sukyi 展开更多
关键词 the tibetan Opera Troupe of tibet autonomous region
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How Should Tibet Face The New Century?──Chairman Leqoi of the Tibet Autonomous Regional Government Answers China's Tibet Questions
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《China's Tibet》 2001年第2期4-6,共3页
关键词 Chairman Leqoi of the tibet autonomous regional Government Answers China’s tibet Questions How Should tibet Face the New Century
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MAP OF THE TIBET AUTONOMOUS REGION
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作者 SOIQUN 《China's Tibet》 2001年第4期20-20,共1页
关键词 MAP of the tibet autonomous region
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Changes of population growth in Tibet Autonomous Region 被引量:1
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作者 FU Xiaofeng Institute of Geography, Chinese Academy of Sciences, Beijing 100101, CHINA 《Journal of Geographical Sciences》 SCIE CSCD 1998年第4期2-11,共10页
The population of the Tibet Autonomous Region which is thinly scattered, is almost entirely Tibetan. The unique high and cold climate, varied and changeable topography and social economic and human environment restri... The population of the Tibet Autonomous Region which is thinly scattered, is almost entirely Tibetan. The unique high and cold climate, varied and changeable topography and social economic and human environment restrict population mobility in the region. Historically there were little statistic documents and the early data about population scale is poorly reliable. After the peaceful liberation of Tibet in 1951, its population went up continuously, and the growth rate has been higher than the national average level since 1964. The general tendency was that the pattern of population increase had changed within a short period. At first, the death rate was lowered quickly and the natural population increase speed was quickened, then, the death rate was lowered further, and the birth rate began to rise at a quick speed. After 1970, both the death rate and birth rate was generally stable, the level was relatively lower than before, the death rate slowed down at a quicker speed than the birth rate. The natural population increase rate rose extremely slowly, which formed the population development situation of fast but steady increase. The future population development tendency is that, the quick increase tendency characterized by young population will continue for quite a long time, and the pressure of future population increase upon resources environment will become increasingly great. The age structure and sex composition of population in Tibet, rather low since long time ago, became increasingly high upon entering the 1980s, but it was still the lowest one compared to other provinces or regions in China. The main reason is due to the low sex ratio of Tibetan infants and children caused by the low sex ratio of newly born infants and the high death rate of male infants, which will slow down the population increase in a limited way. There are few barren lands appropriate for farming and there exist many restricting factors for cultivation or utilization. With further increase in Tibetan population, it is inevitable that per capita available cultivated land will drop continuously. The problem of food supply in Tibet will still be the main issue in its regional development with the increase of population. It is impossible to support a quickly increasing population with the limited agricultural resources in Tibet. Therefore, the population development direction of Tibet can only be to tighten quantity control and to popularize family planning knowledge among Tibetan people. It is a fundamental strategic policy for the social and economic development in Tibet if family planning can be followed progressively on a voluntary basis. 展开更多
关键词 tibet autonomous region population growth food supply education and population quantity lamas census.
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Geographic distribution and prevalence of human echinococcosis at the township level in the Tibet Autonomous Region 被引量:1
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作者 Liying Wang Gongsang Quzhen +4 位作者 Min Qin Zehang Liu Huasheng Pang Roger Frutos Laurent Gavotte 《Infectious Diseases of Poverty》 SCIE 2022年第1期90-90,共1页
Background Echinococcosis,a zoonotic parasitic disease,is caused by larval stages of cestodes in the Echinococcus genus.Echinococcosis is highly prevalent in ten provinces/autonomous regions of western and northern Ch... Background Echinococcosis,a zoonotic parasitic disease,is caused by larval stages of cestodes in the Echinococcus genus.Echinococcosis is highly prevalent in ten provinces/autonomous regions of western and northern China.In 2016,an epidemiological survey of Tibet Autonomous Region(TAR)revealed that the prevalence of human echinococcosis was 1.66%,which was much higher than the average prevalence in China(0.24%).Therefore,to improve on the current prevention and control measures,it is important to understand the prevalence and spatial distribution characteristics of human echinococcosis at the township level in TAR.Methods Data for echinococcosis cases in 2018 were obtained from the annual report system of echinococcosis of Tibet Center for Disease Control and Prevention.Diagnosis had been performed via B-ultrasonography.The epidemic status of echinococcosis in all townships in TAR was classified according to the relevant standards of population prevalence indices as defined in the national technical plan for echinococcosis control.Spatial scan statistics were performed to establish the geographical townships that were most at risk of echinococcosis.Results In 2018,a total of 16,009 echinococcosis cases,whose prevalence was 0.53%,were recorded in 74 endemic counties in TAR.Based on the order of the epidemic degree,all the 692 townships were classified from high to low degrees.Among them,127 townships had prevalence rates≥1%.The high prevalence of human echinococcosis in TAR,which is associated with a wide geographic distribution,is a medical concern.Approximately 94.65%of the villages and towns reported echinococcosis cases.According to spatial distribution analysis,the prevalence of human echinococcosis was found to be clustered,with the specific clustering areas being identified.The cystic echinococcosis primary cluster covered 88 townships,while that of alveolar echinococcosis’s covered 38 townships.Conclusions This study shows spatial distributions of echinococcosis with different epidemic degrees in 692 townships of TAR and high-risk cluster areas at the township level.Our findings indicate that strengthening the echinococcosis prevention and control strategies in TAR should directed at townships with a high prevalence and high-risk clustering areas. 展开更多
关键词 Human echinococcosis PREVALENCE Geographic distribution tibet autonomous region China
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西藏跨境民族形成与发展
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作者 倪芷 《边疆经济与文化》 2024年第2期80-84,共5页
西藏跨境民族有藏族、珞巴族、门巴族、未识别民族夏尔巴人、未识别民族僜人,具有西南地域的特色。本文论述了跨境民族在西藏的分布情况,跨境民族之所以跨境的原因有历史渊源、主动或被动迁徙、不同国家之间的政策等。党和国家在推动西... 西藏跨境民族有藏族、珞巴族、门巴族、未识别民族夏尔巴人、未识别民族僜人,具有西南地域的特色。本文论述了跨境民族在西藏的分布情况,跨境民族之所以跨境的原因有历史渊源、主动或被动迁徙、不同国家之间的政策等。党和国家在推动西藏发展的同时,也带动了这些少数民族发展,铸牢了中华民族共同体意识。 展开更多
关键词 西藏自治区 跨境民族 交往交流交融 中华民族共同体意识
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基于SOFM网络的西藏自治区流域尺度生态功能分区 被引量:6
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作者 牛泽鹏 王晓峰 +1 位作者 罗广祥 尹礼唱 《水土保持通报》 CSCD 北大核心 2020年第4期116-123,共8页
[目的]基于区域关键生态系统服务,研究西藏自治区生态功能区划,为高原生态系统的区域综合认知和空间综合治理提供科学依据。[方法]在GIS技术支持下,基于区域关键生态系统服务功能构建西藏生态功能分区指标体系,运用自组织特征映射(SOFM... [目的]基于区域关键生态系统服务,研究西藏自治区生态功能区划,为高原生态系统的区域综合认知和空间综合治理提供科学依据。[方法]在GIS技术支持下,基于区域关键生态系统服务功能构建西藏生态功能分区指标体系,运用自组织特征映射(SOFM)网络聚类栅格单元指标,并基于小流域单元逐步合并破碎化的聚类结果来确定生态功能区边界。[结果]①区域内各生态系统服务功能指标整体上呈现出从东南向西北递减的格局;②根据各分类栅格的景观聚集度指数确定最优分类数为5类;③破碎化的5种聚类结果经过子流域单元的合并而最终被划分为5个生态功能区。[结论]根据各区域生态系统特征进行命名,划分出藏北高寒荒漠草原生态脆弱区、藏中草原牧业盈余区、藏东亚热带山地针叶林农牧产品供给区、藏东南亚热带山地针叶林产水区和藏东南热带季雨林生物多样性保护区5个生态功能区。 展开更多
关键词 生态功能分区 生态系统服务 SofM网络 流域单元 西藏自治区
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西藏自治区图书馆10年发展与未来展望 被引量:1
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作者 尼玛格桑 《图书馆杂志》 北大核心 2023年第6期4-11,共8页
西藏自治区图书馆从1996年开馆至今从传统图书馆成功步入现代图书馆的转型期。特别是党的十八大以来的10年里,事业发展日新月异。正当党的二十大胜利召开之际,本文回顾自治区图书馆过去10年在基础建设、服务效能、资源建设、阅读推广、... 西藏自治区图书馆从1996年开馆至今从传统图书馆成功步入现代图书馆的转型期。特别是党的十八大以来的10年里,事业发展日新月异。正当党的二十大胜利召开之际,本文回顾自治区图书馆过去10年在基础建设、服务效能、资源建设、阅读推广、数字服务、古籍保护、学会协作等方面所取得的成绩,同时思考制约向“第三代图书馆”发展的瓶颈,谋划未来发展对策。 展开更多
关键词 西藏自治区图书馆 事业发展 图书馆建设
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西藏自治区脑结核瘤手术治疗分析(附16例报道并文献复习)
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作者 多吉玉杰 扎多 +4 位作者 刘焕东 曹旭东 王洪国 罗含欢 仁增 《中国临床神经外科杂志》 2023年第2期83-85,共3页
目的总结西藏自治区脑结核瘤的诊治经验。方法回顾性分析西藏自治区人民医院2013年9月至2021年9月手术治疗的16例脑结核瘤的临床资料。结果15例为脑内单发病灶行开颅显微镜下手术切除病灶;1例多发病灶,手术切除小脑蚓部较大病灶以及左... 目的总结西藏自治区脑结核瘤的诊治经验。方法回顾性分析西藏自治区人民医院2013年9月至2021年9月手术治疗的16例脑结核瘤的临床资料。结果15例为脑内单发病灶行开颅显微镜下手术切除病灶;1例多发病灶,手术切除小脑蚓部较大病灶以及左侧丘脑较小病灶。术后均给予标准抗结核治疗2个月,停用吡嗪酰胺,其它3联化疗3个月~1年。16例术后病理检查均诊断为脑结核瘤。1例小脑半球较大病灶术后并发严重肺部感染、电解质紊乱,最终死亡;其余15例术后随访1年,改良Rankin量表评分0分,未见复发。结论西藏地区结核病高发,对颅内占位性病变,需重视与脑结核瘤鉴别。部分具有手术指征的脑结核瘤,积极手术治疗,联合术后规范抗结核治疗,疗效满意。 展开更多
关键词 脑结核瘤 西藏地区 诊断 手术治疗
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基于人口与经济特征的西藏4A级及以上景区可达性研究
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作者 李庆华 滕俊哲 +2 位作者 张坦 王博 王辛岩 《高原科学研究》 CSCD 2023年第3期39-48,共10页
以西藏4A级及以上旅游景区为研究案例,在综合考虑西藏人口与经济特征的基础上,运用核密度分析、多距离空间聚类(Ripleys K函数)分析、莫兰指数(Moran I)分析等方法,对旅游景区的可达性进行深入分析。研究表明:西藏各区县居民分布呈现显... 以西藏4A级及以上旅游景区为研究案例,在综合考虑西藏人口与经济特征的基础上,运用核密度分析、多距离空间聚类(Ripleys K函数)分析、莫兰指数(Moran I)分析等方法,对旅游景区的可达性进行深入分析。研究表明:西藏各区县居民分布呈现显著的空间聚类特征,人口和经济主要集中在拉萨市城关区,其景区可达性最佳,并呈现出以拉萨-林芝旅游片区为核心,向周围城市扩散趋势。 展开更多
关键词 旅游景区 空间分布 交通可达性 西藏
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西藏车载地震现场应急通信系统设计
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作者 王辉山 许亮 +1 位作者 司金罗布 李佳辑 《高原地震》 2023年第S01期47-52,共6页
根据西藏自治区地震局地震应急响应工作发展需要,概要介绍了地震应急指挥车总体设计,对通信系统、中央控制系统、视频会议与语音系统等各工作子系统的主要性能进行了详细阐述。在地震发生后,该系统能有效提高地震部门应对地震灾害和突... 根据西藏自治区地震局地震应急响应工作发展需要,概要介绍了地震应急指挥车总体设计,对通信系统、中央控制系统、视频会议与语音系统等各工作子系统的主要性能进行了详细阐述。在地震发生后,该系统能有效提高地震部门应对地震灾害和突发公共事件的快速反应能力,辅助相关部门做好地震现场应急救援工作。 展开更多
关键词 地震 应急通讯 地震现场 西藏自治区
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新形势下西藏绿色矿山建设高质量发展研究 被引量:3
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作者 尹莉洁 易建洲 +3 位作者 林毅斌 林德才 魏保军 郑有业 《中国国土资源经济》 2023年第4期73-81,共9页
当前西藏自治区绿色矿山建设高质量发展面临新形势与要求:积极保障国家战略性新兴产业资源安全、全力筑牢国家生态安全屏障、加快推动区域经济高质量发展、竭力服务区域长治久安和助力现代化国家边境建设。西藏自治区在绿色矿山建设方... 当前西藏自治区绿色矿山建设高质量发展面临新形势与要求:积极保障国家战略性新兴产业资源安全、全力筑牢国家生态安全屏障、加快推动区域经济高质量发展、竭力服务区域长治久安和助力现代化国家边境建设。西藏自治区在绿色矿山建设方面取得了一定成效,主要包括绿色矿山建成比例大、多措并举构建和谐矿区、积极引进先进开采技术、不断提高资源综合利用水平和新建矿山严格落实绿色发展理念等;同时也存在一些的不足,主要包括对绿色新发展理念的理解不充分、绿色矿山建设地方标准体系尚未形成、部门联动机制不健全、政策支撑体系有待完善、科技创新薄弱、老矿山建设绿色矿山压力大、矿山生态修复治理难度大等7方面。基于西藏自治区矿产资源基本情况和绿色矿山建设存在的问题,文章提出新形势下推动西藏绿色矿山建设高质量发展建议:(1)坚持规划统领;(2)完善政策支撑体系;(3)强化部门协同联动机制;(4)尽快出台绿色矿山建设地方标准;(5)加强科技创新;(6)构建绿色矿业高质量发展新格局;(7)加强优秀经验推广;(8)探索高海拔地区生态修复和环境保护。 展开更多
关键词 西藏自治区 绿色矿山 生态 地方标准 新形势 科技创新
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西藏传统体育、游艺与杂技类非物质文化遗产项目保护调查与研究 被引量:1
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作者 张济琛 王兴怀 德吉 《武术研究》 2023年第7期91-94,共4页
文章以西藏自治区传统体育、游艺与杂技类非物质文化遗产国家级、省级项目为切入点,采用田野考查法、文献资料法、访谈法、问卷调查法、逻辑分析法、数理统计法等研究方法,对西藏自治区传统体育非物质文化遗产项目进行实证考察。从调查... 文章以西藏自治区传统体育、游艺与杂技类非物质文化遗产国家级、省级项目为切入点,采用田野考查法、文献资料法、访谈法、问卷调查法、逻辑分析法、数理统计法等研究方法,对西藏自治区传统体育非物质文化遗产项目进行实证考察。从调查中了解西藏自治区传统体育非物质文化遗产项目现状、界定、传承人、困境、体育非物质文化遗产援藏以及西藏自治区群众对其的了解。 展开更多
关键词 西藏 非遗项目 传统体育 调查研究
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西藏高海拔地区人群非心胸外科手术术中低氧血症的危险因素:前瞻性队列研究
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作者 段函宇 朱倩梅 +7 位作者 次仁德吉 李艺 苗煦涵 张越伦 刘子嘉 拉巴次仁 申乐 黄宇光 《协和医学杂志》 CSCD 2023年第3期646-651,共6页
目的探讨西藏高海拔地区人群行全身麻醉非心胸外科手术术中低氧血症发生率及其危险因素,并简要分析术中低氧血症对患者预后的影响。方法前瞻性收集2021年6月1日至2022年8月31日西藏自治区人民医院行全身麻醉非心胸外科手术患者的临床资... 目的探讨西藏高海拔地区人群行全身麻醉非心胸外科手术术中低氧血症发生率及其危险因素,并简要分析术中低氧血症对患者预后的影响。方法前瞻性收集2021年6月1日至2022年8月31日西藏自治区人民医院行全身麻醉非心胸外科手术患者的临床资料,包括术前基本资料、手术及麻醉相关信息,主要结局指标为术中低氧血症。采用多因素Logistic回归法分析术中低氧血症的危险因素,并比较术中低氧血症与非术中低氧血症患者围术期预后指标差异。结果共入选符合纳入与排除标准的全身麻醉非心胸外科手术患者161例。其中发生术中低氧血症9例(5.6%),非术中低氧血症152例(94.4%)。多因素Logistic回归分析结果显示,术前血氧饱和度≤85%(OR=4.604,95%CI:1.064~19.916,P=0.041)、术前血红蛋白≥170 g/L(OR=5.396,95%CI:1.163~25.035,P=0.031)、术前肺动脉压≥40 mm Hg(OR=11.744,95%CI:1.599~86.243,P=0.015)是西藏高海拔地区人群行全身麻醉非心胸外科手术出现术中低氧血症的独立危险因素。术中低氧血症患者围术期心脏不良事件发生率较非术中低氧血症患者显著增加(55.6%比15.1%,P=0.002)。结论术前低血氧饱和度、高血红蛋白血症和肺动脉高压是西藏高海拔地区人群行全身麻醉非心胸外科手术术中低氧血症的危险因素,且术中低氧血症可能对患者预后造成不良影响。 展开更多
关键词 西藏自治区 高海拔 全身麻醉 术中低氧血症 危险因素
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色林错裸鲤感染匙形双穴吸虫的种群动态和寄生偏好 被引量:1
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作者 潘瑛子 《水生生物学报》 CAS CSCD 北大核心 2023年第6期924-930,共7页
文章通过种群动态研究匙形双穴吸虫感染在时空上的变化,并研究该虫感染是否存在对宿主性别、左右眼及眼球不同部位的寄生偏好性,摸清匙形双穴吸虫在色林错裸鲤中的感染情况,分析种群消长原因,探究其生活史策略。跨年按不同季节采捕色林... 文章通过种群动态研究匙形双穴吸虫感染在时空上的变化,并研究该虫感染是否存在对宿主性别、左右眼及眼球不同部位的寄生偏好性,摸清匙形双穴吸虫在色林错裸鲤中的感染情况,分析种群消长原因,探究其生活史策略。跨年按不同季节采捕色林错裸鲤,记录全长、体重和性别,采集并统计匙形双穴吸虫囊蚴数量,计算不同时空下的感染率和平均丰度,通过独立样本非参数检验,判断不同性别宿主、左右眼及眼球不同部位的感染数量是否存在显著差异性,以检验匙形双穴吸虫是否存在寄生偏好。共剖检色林错裸鲤165尾[全长28.7—49.5 cm,平均全长(37.9±4.0)cm,体重196.9—827.2 g,平均体重(473.3±127.9)g,包括雌性82尾,雄性83尾],共检出匙形双穴吸虫515只,最大寄生量为32只/尾。在时间上,匙形双穴吸虫感染率和平均丰度在2020年夏季最高,秋季和春季呈下降趋势,2021年夏季感染率下降,平均丰度却呈上升趋势,2021年秋季与2020年秋季感染率与平均丰度较为接近。在空间上,根据色林错裸鲤全长范围,以5 cm为分组间隔,将其分为5个全长组,感染率和平均丰度在25 cm≤TL<30 cm全长组最低,在30 cm≤TL<35 cm、35 cm≤TL<40 cm和40 cm≤TL<45 cm全长组均较为接近,在45 cm≤TL<50 cm全长组出现了较大的上升。匙形双穴吸虫对色林错裸鲤的感染,在不同性别的宿主中不存在偏好,对宿主的左右眼也不存在偏好性,但在晶状体和玻璃体中存在明显的偏好性,更多寄生于晶状体中。匙形双穴吸虫种群消长的季节动态,与水温等环境因素、候鸟的迁徙时间和螺类的存在息息相关。随着鱼类宿主全长的增长,眼睛体积增加,可容纳数量更多的复口吸虫,长期积累性接触也使感染数目更多。在45 cm≤TL<50 cm全长组出现了较大的上升,可能是因为更大的体型代表着更大的表面积,不仅可受到更多尾蚴的入侵,也在一定程度上有利于色林错裸鲤在不断增加的感染水平下保持生存,从而积累更多的匙形双穴吸虫。匙形双穴吸虫感染色林错裸鲤的寄生偏好,是适应环境所表现出的一种生活史策略,有利于种群的传播和繁衍。 展开更多
关键词 种群动态 寄生偏好 匙形双穴吸虫 色林错裸鲤 色林错 西藏
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