That's the basis of sexual selection.

这是性选择的基础。

" We previously thought this was mostly due to sexual selection, " he said.

" 我们之前认为这主要是由于雌雄淘汰。"

This is what the theory of sexual selection would predict.

这是性选择理论做出的预测。

This is a form of sexual selection and is subject to natural selection.

这是一种性选择的形式，受自然选择的影响。

One by one, natural selection and sexual selection leave the weak and the timid behind.

自然选择和性选择接二连三地淘汰了弱者和胆小鬼。

Their advanced physiology comes down to one thing...adaptation, the result of both natural and sexual selection.

这些先进的生理机能都能归结为一点，那就是适应能力，这是自然选择和性选择的结果。

Sexual selection is, therefore, less rigorous than natural selection.

因此，性选择不如自然选择严格。

This is know as sexual selection.

这就是性选择。

It was sexual selection to compete for mates, instead.

相反，性选择是为了争夺配偶。

So sexual selection is thought to produce  many showy animal structures - even walrus tusks.

因此，性选择被认为产生了许多华丽的动物结构——甚至是海象的象牙。

This leads me to say a few words on what I have called sexual selection.

这让我想就我所谓的性选择说几句话。

Sexual selection, a phenomenon first described scientifically by Darwin, occurs when one sex (usually the female) chooses another (usually the male) on the basis of a distinctive genetically derived characteristic.

“性选择”是达尔文首次在科学上描述的一种现象，在一个性别(通常是女性)基于一种独特的遗传特征来选择另一个性别(通常是男性)之时出现。

And sexual selections give rise to a host of organisms, some of which survive and are fit and others which aren't.

性选择产生了大量的生物体，其中一些能够存活下来并适应，而另一些则不能。

These guys, we think, and we've pretty good evidence to say this, that the reason these guys are so bizarre-looking is that they have an extremely intense sexual selection.

这些家伙，我们认为，我们有很好的证据证明这一点，这些家伙看起来如此奇怪的原因是他们有极其强烈的性选择。

The sail and tail may not have been for  balance and propulsion respectively, but rather, a display for sexual selection, like a  peacock's tail.

帆和尾巴可能不是分别用于平衡和推进，而是用于性选择的展示，就像孔雀的尾巴一样。

It looked to be another example of sexual  selection driving extreme head and neck traits in the giraffe family that  were totally unrelated to feeding.

这似乎是性选择导致长颈鹿家族极端头部和颈部特征的另一个例子，而这些特征与进食完全无关。

The classic example is a peacock's tail. But sexual selection could also serve to separate species in what is more-or-less a one-step process, by the sudden appearance of such a characteristic.

孔雀的尾巴就是比较经典的例子。但是性选择也可以通过这种特征的突然出现，在一个或多或少是一步的过程中分离物种。

The field of evolutionary biology also developed around this time; pioneered by male scientists, who used their theories on sexual selection to explain Victorian gender roles.

进化生物学领域也在这段时间发展起来； 由男性科学家开创，他们用他们的性选择理论来解释维多利亚时代的性别角色。

Now, Sheela Turbek of the University of Colorado, in Boulder, has taken matters a step further, by showing that a process called sexual selection plays a role in what is going on.

目前，来自科罗拉多大学(位于博尔德)的席拉·图尔贝克通过展示一种被称为性选择的过程在正在发生的事情中起着作用使得这一说法更进一步。

Sexual selection has given the most brilliant colours, elegant patterns, and other ornaments to the males, and sometimes to both sexes of many birds, butterflies and other animals.

性选择赋予雄性最鲜艳的色彩、 优雅的图案和其他装饰，有时也赋予许多鸟类、 蝴蝶和其他动物的两性。