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migratory behavior     
相关语句
  迁飞行为
     Radar observations on the migratory behavior of the second generation cotton bollworm moths in the north part of northern China
     华北北部地区二代棉铃虫成虫迁飞行为的雷达观测
短句来源
     The study on migratory behavior of cotton bollworm showed that the moths usually took off in 19 : 30 -20 : 00 o'clock and alighted on the deck of boat in 4 : 00 - 5 : 00 o'clock in the morning after they flew 8. 5 - 9. 5h in the air.
     在距海岸线20~80km处发现大量的棉铃虫、粘虫和龟纹瓢虫等昆虫向辽宁方向迁飞。 对棉铃虫迁飞行为的观察结果表明,棉铃虫成虫于傍晚19:30左右起飞,凌晨4:00~5:00降落,共计在空中大约飞行8.5~9.5h。
短句来源
     Ovarian Development of Adult Females of Cotton Bollworm and Its Relation to Migratory Behavior Around Bohai Bay of China
     环渤海湾地区棉铃虫成虫的卵巢发育特点及与迁飞行为的关系
短句来源
     The Physiological and Genetic Characteristics of Migratory Behavior and Genetic Diversity, as Determined by AFLP in the Oriental Armyworm, Mythimna Separata (Walker)
     粘虫迁飞行为的生理、遗传特征以及遗传多样性的AFLP分析
短句来源
     Recently most researches related physiological characteristics of insect migratory behavior are the result of analyzing laboratory insect populations and difficult to represent the fact of the natural populations, in addition, little is known about genetic characteristics and application of melecular biology to insect migratory behavior regulation, so this dissertation focus on the physiological and genetic characteristics in migration and genetic diversity of different geographical and melanic forms as determined by AFLP in Mythimna separata.
     以及迁飞行为的生理及遗传特征一直是国内外昆虫迁飞研究领域中的热点问题。 但是,目前昆虫迁飞行为生理特征的研究主要是以室内研究为主,因而较难反映昆虫实际迁飞过程中行为生理特征的变异。
短句来源
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  迁徙行为
     Further research on stopover ecology is urgently needed in China for a better understanding of the migratory behavior and for the conservation of these songbird migrants.
     对迁徙中途的停歇生态研究有利于更好地了解鸟类的迁徙行为和更有效地保护迁徙鸣禽类。
短句来源
     Large changes in these factors always caused adaptive changes in their behavior and more obvious influence on their migratory behavior,while food and water supply may affect the overwintering behavior through changes in climatic fac- tors and influence on safety.
     气候因子则根据各级气象部门的预报结果,结合观察点温度计等手段测算。 结果表明丹顶鹤越冬期间,气候因子的变化是对其行为产生直接影响的主要因素,温度、雨、雾、雪、风等发生大幅度变化时,都将导致越冬期丹顶鹤的行为发生相应的适应性变化,对迁徙行为的影响则更为明显。
短句来源
  迁移行为
     International migration of specialized human capital is the elemental form of international talent flows in the era of knowledge economy, while such kind of migratory behavior will result in the contest for interests between nations, not just the advantages and disadvantages of specialized human capital in the international community composed by sovereign states.
     专业化人力资本国际迁移是知识经济时代国际人才流动的基本形式,而在以主权国家为基本单位的国际社会,这种迁移行为将引发国家层面上的利益争夺,而不仅仅是专业化人力资本自身的利害得失。 该领域的相关研究主要围绕两大问题展开:一是为何迁移,二是怎样迁移,前者即迁移的机理与动因,后者即迁移成本、收益、特点及趋势。
短句来源
     This paper reviewed the research development on insect resistance mechanism to B. thuringiensis , including aspects of physiological and biochemical, genetics, feeding and migratory behavior, as well as cross resistance.
     本文从害虫的生理生化特性、遗传学基础、取食和迁移行为及交互抗性等方面综述了有关害虫对苏云金杆菌的抗性机制研究进展,揭示抗性产生及发展的原因。
短句来源
     Migratory behavior of gold nanoparticles and Au-BSA conjugates in the applied electric field is similar to that of rocket immuno-electrophoresis,where the migration speed decreases with increasing gold nanoparticles size.
     胶体金及其BSA复合物在特定电场中的迁移行为类似于火箭免疫电泳,其迁移速度随着金纳米粒子粒径的增大而减小;
短句来源
  迁飞
     Radar observations on the migratory behavior of the second generation cotton bollworm moths in the north part of northern China
     华北北部地区二代棉铃虫成虫迁飞行为的雷达观测
短句来源
     The study on migratory behavior of cotton bollworm showed that the moths usually took off in 19 : 30 -20 : 00 o'clock and alighted on the deck of boat in 4 : 00 - 5 : 00 o'clock in the morning after they flew 8. 5 - 9. 5h in the air.
     在距海岸线20~80km处发现大量的棉铃虫、粘虫和龟纹瓢虫等昆虫向辽宁方向迁飞。 对棉铃虫迁飞行为的观察结果表明,棉铃虫成虫于傍晚19:30左右起飞,凌晨4:00~5:00降落,共计在空中大约飞行8.5~9.5h。
短句来源
     Ovarian Development of Adult Females of Cotton Bollworm and Its Relation to Migratory Behavior Around Bohai Bay of China
     环渤海湾地区棉铃虫成虫的卵巢发育特点及与迁飞行为的关系
短句来源
     Recently most researches related physiological characteristics of insect migratory behavior are the result of analyzing laboratory insect populations and difficult to represent the fact of the natural populations, in addition, little is known about genetic characteristics and application of melecular biology to insect migratory behavior regulation, so this dissertation focus on the physiological and genetic characteristics in migration and genetic diversity of different geographical and melanic forms as determined by AFLP in Mythimna separata.
     以及迁飞行为的生理及遗传特征一直是国内外昆虫迁飞研究领域中的热点问题。 但是,目前昆虫迁飞行为生理特征的研究主要是以室内研究为主,因而较难反映昆虫实际迁飞过程中行为生理特征的变异。
短句来源
     Since insect migration not only represents an adaptive syndrome in behavior evolved from adaptation to varying and unpredictable environmental conditions for long time, but also leads to serious damage of the crops, so the formation and regulation of insect migration and relationship between flight and reproduction and the physiological and genetic characteristics of migratory behavior are always the popular issue in the field of insect migration research.
     迁飞是昆虫在长期适应多变的环境过程中进化形成的一种行为对策,也是昆虫的种类和数量繁多,以及迁飞害虫经常暴发成灾的主要原因。 因此,昆虫迁飞行为的发生与调控,迁飞与生殖的互作关系。
短句来源
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      migratory behavior
    The recent progress in trafficking receptors and migratory behavior of FoxP3+ Tregs is reviewed here and the validity of these myths is examined.
          
    Because of their distinctive functions and gene expression phenotype, the migratory behavior of FoxP3+ Tregs has been somewhat mystified.
          
    Migration assays revealed heterogeneous responses between the different cell lines, ECM components and culture conditions, making it difficult to correlate ECM expression patterns and migratory behavior.
          
    Autocrine motility and scatter factors probably have key roles in initiating migratory behavior, while specific and non-specific extracellular matrix alterations can facilitate cell locomotion.
          
    Acid-exposed hatchery-origin and wild Narraguagus River smolts were both under ionoregulatory stress that may have affected their migratory behavior, but not their survival for the time and area in which we tracked them.
          
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    Resistance to Bacillus thuringiensis, the most widely used and intensively studied microbial insecticides, has been reported in some cases. Resistance development will potentially imperil the application of B. thuringiensis in near future. This paper reviewed the research development on insect resistance mechanism to B. thuringiensis , including aspects of physiological and biochemical, genetics, feeding and migratory behavior, as well as cross resistance. It was discussed on the strategies of resistance...

    Resistance to Bacillus thuringiensis, the most widely used and intensively studied microbial insecticides, has been reported in some cases. Resistance development will potentially imperil the application of B. thuringiensis in near future. This paper reviewed the research development on insect resistance mechanism to B. thuringiensis , including aspects of physiological and biochemical, genetics, feeding and migratory behavior, as well as cross resistance. It was discussed on the strategies of resistance management through the new strain selection, genetic engineering and applied technique in field based on the principle of integrated pest management(IPM) and insecticide resistance management(IRM).

    苏云金杆菌是一种应用面积最大的微生物杀虫剂,已有资料报道多种害虫对其产生了不同程度的抗药性,抗性发展对苏云金杆菌的应用是一个潜在的威胁。本文从害虫的生理生化特性、遗传学基础、取食和迁移行为及交互抗性等方面综述了有关害虫对苏云金杆菌的抗性机制研究进展,揭示抗性产生及发展的原因。最后,根据害虫综合治理和杀虫剂抗性治理原理,从菌株选育、遗传工程和使用技术三方面探讨了抗性治理的对策。

    A hypothesis on the exciting mechanism of rice planthopper plagues in northern China was presented based on the migratory behavior of BPH and WBPH, and the general circulation of the atmosphere in East Asia. It is suggested that the plague will be triggered when the temporal and spatial variation of the northward low level jet coincides with the emigration periods and regions of the outbreak populations of BPH and WBPH in central eastern China, and that the plague spots will be consistent with the forward...

    A hypothesis on the exciting mechanism of rice planthopper plagues in northern China was presented based on the migratory behavior of BPH and WBPH, and the general circulation of the atmosphere in East Asia. It is suggested that the plague will be triggered when the temporal and spatial variation of the northward low level jet coincides with the emigration periods and regions of the outbreak populations of BPH and WBPH in central eastern China, and that the plague spots will be consistent with the forward position of the low level jet. where rainstorms are generally expected.Furthermore, the research methodology for the verification of the hypothesis was discussed.

    本文通过对大量文献资料的综合分析,从飞虱的飞行特性和北迁运载气流入手,以东亚大气低层环流为背景审视飞虱在有限时间内远迁北方致灾的成因机制,提出了以北上低空急流的时空变化与南方大发生虫源迁出期(区)相吻合、其前沿所至与北方迁入区相一致作为北方稻虱成灾的启动因子的假说.并提出了验证该假说的研究方法和技术路线,为揭示北方稻虱成灾的奥秘,完善灾变监测技术和预警系统奠定了基础。

    Poyang Lake, a special freshwater lake , is an inflow-outflow lake with falling water level and rich aquatic creature resources. The migratory behavior of Poyang Lake wetland soil elements is more remarkable than that of ordinary soil because of its periodic variation of water level. The typical elements, Fe and Mn, which are sensitive to oxidation-deduction control the geochemical circulation of some other trace elements. In this paper, the acidity(pH) and redox potential(Eh) of the wetland soil cores...

    Poyang Lake, a special freshwater lake , is an inflow-outflow lake with falling water level and rich aquatic creature resources. The migratory behavior of Poyang Lake wetland soil elements is more remarkable than that of ordinary soil because of its periodic variation of water level. The typical elements, Fe and Mn, which are sensitive to oxidation-deduction control the geochemical circulation of some other trace elements. In this paper, the acidity(pH) and redox potential(Eh) of the wetland soil cores of Poyang Lake at different depths are observed in the spot. The distribution of the total content of elements, Fe and Mn, reduced Fe and Mn, organic matter etc. at different depths on the section is also studied. The results show that Fe and Mn are of special distribution pattern and migratory characteristics. Fe was only accumulated lightly on the water-land boundary layer, but Mn not only on the boundary layer, but also in deep layers. The distribution and migratory characteristics of reduced Fe and Mn which are controlled by the redox boundary layer occured in the vertical direction. Fe and Mn migrated in the horizontal direction was also found, which was related to the change of water level. When tide is on the ebb, Fe and Mn migrate to the lake centre. Results in Dacha Lake, Sha Lake etc. around the Wucheng County showed the same conclusion. Finally we discussed the influence on the environment of Poyang Lake aera owing to the variation of water level caused by the Three-Gorge Project. After the building of the Three -Gorge Project, because discharge amount of the Yangtze River decreases in October caused by storing floodwater, Poyang Lake water level will descend significantly, and wetland of Poyang Lake will emerge earlier, resulting in, the change of soil characteristics.

    对鄱阳湖地区蚌湖水下沉积物、滩地草甸土柱状样品不同深度土壤的酸度、氧化还原电位进行了现场测定;对剖面各层次的Fe、Mn总量,还原性Fe、Mn含量,以及有机质等进行了分析。实验表明:鄱阳湖湿地土壤中Fe、Mn有其独特的分布规律和迁移特征。元素Fe仅在水土界面轻微富集,Mn则向界面和深层双向富集;还原性Fe、Mn受氧化还原边界层的控制呈垂向分布。另外,元素Fe、Mn的水平迁移与水位变动相关,退水时Fe、Mn具有向湖中心迁移的特征。

     
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