交配不能

The strange and powerful mating calls of the giant flightless parrot of New Zealand, the Kakapo. There are only 86 of them left in the world.

新西兰的枭鹦是一种不能飞的巨大鹦鹉，它求偶时会发出很奇特很大声的交配鸣叫，现在全世界只有86只存活的枭鹦。

LYNEE MALCOLM: The strange and powerful mating calls of the giant flightless parrot of New Zealand, the Kakapo. There are only 86 of them left in the world.

林恩·马尔科姆：新西兰的枭鹦是一种不能飞的巨大鹦鹉，它求偶时会发出很奇特很大声的交配鸣叫，现在全世界只有86只存活的枭鹦。

No significant relationship was found between the body sizes of amplexed males and females and successful male frogs were not significantly larger than unmated males.

结果表明：抱对雄蛙和雌蛙的个体大小无显著的关系，成功交配的雄蛙并不比未交配的雄蛙大，其它雄蛙不能取代已抱对的雄蛙。

Dodson has a name for each of his charges and can pick them all out on sight, though they look much alike to the unpracticed eye.

道森为每一只交配出来的犬都起了名字，在不熟悉这些小狗的人来看，他们似乎都如出一辙，道森却很容易就能辨别出他们。

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。

Since he cannot be sure of paternity, the best he can do is prevent his mate from copulating with any other males.

由于怕不能确保父子关系，对他来说，最好的办法就是防止配偶和他人交配。

This result is consistent with the result come from PCRfingerprinting method. The results of the two methods indicate that maize, soybeanand castor-oil plant can act as refuges of Bt sensitive cotton bollworm as non-Btcotton; while sesame and peanut may not.

第三代棉铃虫的六个寄主种群间存在一定的遗传差异；其中，花生种群与其他种群间没有明显的基因交流，遗传分化比较明显；Bt棉上的棉铃虫与普通棉花、大豆、玉米上的棉铃虫敏感种群间基因交流频繁；而与花生、芝麻上的棉铃虫敏感种群间的基因流均不显著，说明它们间有可能不能进行随机交配。

The results suggest that bothmaize and castor-oil plant could be refuge to provide susceptible individuals and toprolong the effectiveness of Bt-cotton, but peanut and sesame may not.

说明除普通棉花外，玉米、蓖麻能作为庇护所，提供Bt易感棉铃虫与抗虫棉上的棉铃虫个体随机交配，稀释抗性基因频率，防止棉铃虫对转Bt抗虫棉的抗性，而芝麻和花生不适于作为Bt易感棉铃虫的庇护所在田间与转基因棉花套种。

Results of interpopulation crossing test of mating, fertilization rate, embryo growth and hatchability under the condition of cage feeding indicated that:(1) due to difference in body size, morphology, habits and characteristics and reproducing season, crossing fertility between wild Japanese quail in China and domestic quail population was lower than that of intrapopulation mating, but fertilized egg through reciprocal crossing could be incubated and produced F1 without prezygotic isolation;(2) crossing of wild male quail ?female small-type domestic quail produced the best effect among all combinations of reciprocal crossings.

通过关于笼饲环境下交配行为、受精率、胚胎发育、种蛋孵化率的种群间杂交试验证明：由于体量、形态、习性、繁殖季节性的差异，我国境内的野生日本鸣鹑与家鹑群体之间的杂交能育性低于同种群交配水平，但可以实现正、反杂交，产生受精卵、孵出杂种一代，不存在合子前生殖隔离；在正反杂交组合中，以野雄鹑X小型雌家鹑的效果最好。

Animals of all sizes, from elephant to ant , all have procreational intercourse for their lifetime instead of recreational sex that humen beings can enjoy.

各种大小动物，大至大象，小如蚂蚁，终身都只是为了繁殖而交配；而不像人类能那样能以欢愉为目的享受性爱。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。