交配的

When male mated consecutively in a night, mating interval, duration for mating, each mounting, intromission and the last mount, and copulatory mass kept constant, suggesting that male possess a pattern of constant mating investment, which might result from intense sperm competition in this species.

雄兽连续交配时，交配间隔、交配持续时间、每次爬跨持续时间、总爬跨持续时间、最后一次爬跨持续时间、射精持续时间等行为参数以及交配栓的重量均保持不变。表明雄兽具有恒定的交配投资模式，这种模式可能起因于该物种雄性之间激烈的精子竞争。

By the contrast between common population and inbreeding population, we know that the sameness of them are they all take the population for the synthesis of panmixia and selfing or inbreeding.

通过普通群体与近亲交配群体的比较，群体在非平衡条件下，普通群体与近亲交配群体相同的是都把群体作为随机交配和自交或近亲交配两部分的合成群体。

For allopatric species, asymmetric ethological isolation was apparent in crosses between O. chinensis formosana and O. yezoensis: females of O . chinensis formosana readily accepted males of O. yezoensis, but females of O. yezoensis show reluctance to males of O. chinensis formosana; howe ver, in either reciprocal cross sperms were transferred.

分布不重叠的中华稻蝗台湾亚种与小翅稻蝗之间，小翅稻蝗的雌虫与中华稻蝗台湾亚种雄虫的交配率显著低于种内交配，反向交配时则和种内交配率无显著差异；正反交配都能完成精子传送，显示出不对称、不完全的行为隔离，而无机械隔离的存在。

When mating virgin females, males decreased investment in the form of copulatory plug, but increased investment in the form of behaviors, such as increased mating duration, shorten mating interval, longer duration for mountings and intromissions.

雄性与处女兽交配所形成的交配栓明显减小，却增加了行为上的交配投资，表现为与处女兽交配时交配持续时间较长、交配间隔较短、总爬跨持续时间和总插入持续时间较长。

This news people can not help but think of the recent virtual community online game "Second Life" is horrifying phenomenon - when you see the other players in the game, and friends lie on the green lawn, as if caressing his own children in the lovely pets in general, you can guess these Licorne baby is not in the game by the players or game development companies produced, but through play and the role of women in Belgium on a plateau in the stores Kirin adult mating results.

此消息让人不禁联想到最近虚拟社区网络游戏《第二人生》的令人咋舌的现象——当你看到游戏中的其他玩家，在和朋友一起躺在那翠绿的草坪上，抚摸着仿佛自己亲生孩子一般的可爱宠物的时候，你能否猜得到，这些独角兽的宝宝并不是由游戏中的玩家或者游戏开发公司所制作出来的，而是通过游戏中的女性角色与位于比利时高原上某个商店中的成年麒麟交配的结果。

The mate choice of Brandt′s voles Microtus brandti was investigated in the laboratory to study the mating system of this species. It was found that the female voles spent significantly more time visiting the partners than the strange males, but the male voles did not show any preference of the partners to the strange females. A female vole showed no difference in the copulatory behavior between an unfamiliar male and a familiar male which had copulated with her for 15 minutes, but she visited and fought the unfamiliar male significantly more than the familiar male. A male vole significantly preferred visiting and mating with an unfamiliar oestrous female to a familiar female which had copulated with him for 15 minutes.

在实验室通过布氏田鼠对配偶与陌生异性鼠、已交配和未交配异性鼠、熟悉和陌生异性鼠三种情况下配偶选择的实验研究，结果表明：雌性布氏田鼠对配偶的选择显著地要多于陌生雄鼠；虽然对陌生和熟悉雄鼠选择差异不显著，但对陌生鼠的选择强度要高于熟悉雄鼠；同时对已交配和未交配雄鼠的选择无显著差异。

The calling and copulation behaviour of Ancylis sativa Liu had a dielperiodicity.The female moths began to calling at the first day and increasedto 100% at the second day,then the percentage of calling decreasedgradually from the third day to the fifth day,only 16.7% of females showingcalling behaviour at the sixth day.The effect of environmentaltemperature on calling behaviour of Ancylis sativa Liu was studied duringadult life at 16℃,21℃,26℃ and 31℃.The result showed differenttemperature during adult life affected significantly the calling behaviour ofvirgin females.There was considerable variability in the calling patternsamong the different temperature groups,the higher the temperature was,thelater females called,the shorter the calling behaviour lasted.The copulationbehaviour of Ancylis sativa Liu can be divided into following squence:female calling,male responsing,male approaching female,hairpencil displayingand copulating.

枣粘虫求偶和交配行为研究结果表明，在光周期为14L：10D、温度为21℃下，越冬代枣粘虫雌蛾的求偶高峰期为黑暗期6.0-8.0小时，求偶活动以羽化后1-3天表现强烈，第二天求偶百分率高达100％，第4天开始，求偶百分率下降，到第6天仅为16.7％；环境温度对枣粘虫雌蛾的求偶活动有明显的影响，随着温度的下降，求偶高峰期明显提前，求偶高峰期的持续时间变长，在21、26、31℃下，求偶百分率接近或达到100％，在16℃下，仅为43％；枣粘虫的交配行为可分为雌蛾求偶、雄蛾反应、雄蛾接近雌蛾、打开味刷及交配成功等阶段；交配活动也以羽化后前3天表现强烈；第1、2代在黑暗周期中的交配高峰期比越冬代推后1-2.5小时；越冬代枣粘虫的交尾持续时间多为3-4小时，第1、2代比越冬代短；越冬代交尾前期多为2-3天，第1、2代多为1-2天，少数羽化当天便可交尾；雌雄成虫均有多次交尾习性，雄蛾最高交尾6次，平均3.3次，雌蛾最多交尾3次，平均1.5次，在田间自然条件下，大多数越冬代雌雄成虫只交尾1次，第1、2代交尾次数有所增高，第1、2代成虫交配率明显高于越冬代。

Methods: Inbred WKAH/Hkm rats were used for this study. Pregnant females were treated with busulfan at embryonic day 11. The embryos were removed at E12 to E21 and stained with alcian blue and alizarin red S. The abnormal changes in the treated embryos' hind limbs were observed with a microscope.

近亲交配的WKAH/Hkm大鼠被用于这项研究，妊娠的雌性大鼠在妊娠11天用白消安处理，妊娠12天到21天的胚胎被移开并用阿辛蓝和水溶性茜素红s处理染色，处理后的胚胎后肢的变化可以在显微镜下观察到。

If the number of matings is small, then the actual numbers of different types of pairing may depart significantly from the number expected on a purely random basis. Genetic drift is one of the factors that can disturb the HARDY-WEINBERG EQUILIBRIUM.

如果交配的数量很小，那么不同种类的配对的真实数量会与所期望的纯的随机的数量大不相同，遗传漂变也是一种可以扰乱哈迪—温伯格平衡的因素。

Meanwhile, researchers including Inga Neumann, PhD, of the University of Regensburg in Germany have shown that pregnant and lactating rats are less prone to fear and anxiety in the face of stress than virgin rats, as measured by fewer stress hormones in the blood.

与此同时，包括德国 Regensburg大学的Inga Neumann博士在内的研究人员也通过测量血液中的压力荷尔蒙，发现怀孕和哺乳期的大鼠在面对压力时，比未曾交配的大鼠更少出现恐惧和焦虑。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐