Quantitative genetic models of sexual selection

Summary Quantitative genetic models of sexual selection have disporven some of the central tenets of both the handicap mechanism and the sexy son hypothesis. These results suggest that the good genes approach to sexual selection may generally lead to erroneous results.Runaway sexual selection seems possible under a wide variety of circumstances. Quantittive genetic models have revealed runaway processes for sexually selected attributes expressed in both sexes and for attributes of parental care. Furthermore, the runaway could occur simultaneously in a series of populations that straddle an environmental gradient. While the models support the feasibility of runaway processes, empirical studies are needed to evaluate whether runaways actually happen. Estimates of critical genetic parameters are particularly needed, as well as measures of natural and sexual selection acting on the same population.The models also show that sexual selection has tremendous potential to produce population differentiation, particularly in epigamic traits. Differentiation is promoted by indeterminancy of evolutionary outcome, transient differences among populations during the final slow approach to equilibrium, sampling drift among equilibrium populations, and the tendency of sexual selection to amplify geographic variation arising from spatial differences in natural selection. Recent work with two- and three-locus models of sexual selection has produced results that parallel the results of the polygenic models^36–38,58. Thus the feature of indeterminate equilibria (outcome dependent on initial conditions) is common to both types of model.     

高阶微分中值定理及其应用

利用向量形式的微分中值定理,把一阶微分中值定理推广到全新的高阶微分中值定理,并研究了它的应用．     

《内蒙古师范大学学报》(自然科学汉文版)主要文献计量指标评析

对《内蒙古师范大学学报》 （自然科学汉文版）1999-2003年的文献计量指标进行了统计和分析,并选取总被引频次、影响因子、即年指标、他引总引比四项指标与师范类高校学报进行了排序分析.结果表明,学报的各项指标比较稳定,并呈逐年上升趋势,但学报的整体水平不高,与许多同类期刊相比尚有较大差距.学报要改变办刊观念和办刊模式,突出个性和特色,提高学报的学术影响力.     

内蒙古小城镇可持续发展评价指标体系初探

基于小城镇可持续发展的思想内涵与目标，从小城镇可持续发展必备的地理环境、资源基础、经济条件、社会系统、科技优势、制度与政策6个基本条件出发，构建了包括环境、资源、经济、社会、科技和政策等要素在内的内蒙古小城镇可持续发展评价指标体系．     

内蒙古发展生态农业的宏观调控对策研究

发展生态农业是内蒙古农业可持续发展的必然要求，根据所处的地理位置和气候条件，内蒙古比较适宜发展高效节水农业、沙产业和观光农业。宏观调控对策对实现发展生态农业的战略目标具有决定性意义。     

内蒙古西部荒漠半翅目昆虫多样性及区系研究

内蒙古西部荒漠是内蒙古昆虫区系重要的组成部分。由于该地区复杂和特殊的自然条件，形成了半翅目昆虫种类的多样性和区系性质的特殊性。     

内蒙古自治区赛罕乌拉国家自然保护区地衣的区系研究

内蒙古自治区赛罕乌拉国家自然保护区地衣共有12科13属42种1变型，其中优势科为梅衣科、蜈蚣衣科、黄枝衣科、石蕊科。其区系成分以环北极成分、东亚成分为主．这与该保护区维管束植物区系特点相一致，过滤性是其突出特点。     

内蒙古自治区马拉松运动发展对策研究

在总结内蒙古自治区马拉松运动取得成功经验的基础上，分析了内蒙古自治区马拉松运动的现状，指出目前存在的问题，提出内蒙古自治区马拉松运动的发展对策．     

温差电动势对测量灵敏电流计内阻的影响

以测量灵敏电流计内阻为例，分析了温差电动势产生的原因，是由于光点式灵敏电流计内部有照明光源，与外电路存在温差而引起的．并定量给出了由此带来的测量误差．介绍了消除温差电动势影响的方法．     

A new species in the genus Grandidierella Coutière (Crustacea: Amphipoda) from an Australian solar salt-works

Grandidierella propodentata sp. nov., a third Australian species of the genus, is described. It was collected from among algae in a hypersaline lagoon in Queensland. Sexual dimorphism of the uropods is reported for the first time in this genus.