The behaviour may also deter competing males and stops different species interbreeding.

这种行为也可能阻止互相竞争的雄性，并阻止不同物种的杂交。

Having a tight aggregation, hunting and interbreeding with related crocodile species all pose threats.

由于聚群密集，和近亲鳄鱼共同捕猎并种间繁殖，这都对它们造成了威胁。

Because we don't know the exact source of that interbreeding, we can't link it with the fossils directly.

因为我们不知道这种融合混血的确切来源，我们不能直接把它和化石联系起来。

That means interbreeding between the two reduces the quality of wild varieties.

这意味着两者之间的杂交会降低野生品种的质量。

It was not clear from the Oase man's genome whether interbreeding was common in Europe.

从绿洲人的基因组来看， 混血在欧洲是否很普遍尚不清楚。

Which suggests that both of these traits are used to distinguish one another in territorial interactions and avoid interbreeding.

这表明这两种特征都被用来在地域互动中相互区分并避免杂交。

What's less well known is that there were other ancient interbreeding events in our genome showing up in Neanderthals and in other groups.

鲜为人知的是，在我们的基因组中还有其他古时融合混血，显现出有尼安德特人和其他群体的基因。

Escapes are also a concern as interbreeding threatens wild salmon populations and farmed salmon can pass parasites to the wild fish.

逃逸也是一个问题，因为杂交威胁到野生鲑鱼种群，而养殖鲑鱼可以将寄生虫传染给野生鱼类。

But I believe that their fertility has been diminished in nearly all these cases by an independent cause, namely, by too close interbreeding.

但我相信，在几乎所有这些情况下， 它们的生育能力都被一个独立的原因所削弱， 即由于过于紧密的杂交。

In order for a scientist to confirm whether animals are from a single species or multiple species, he must observe the animals interbreeding.

科学家为了确认动物是来自单一物种还是来自多个物种，他必须观察动物的杂交。

Mr Malfoy submitted his demand for a ban on the story in writing: Any work of fiction or non-fiction that depicts interbreeding between wizards and Muggles should be banned from the bookshelves of Hogwarts.

任何描绘巫师和麻瓜通婚的虚构或非虚构类作品，都应该禁止出现在霍格沃茨的书架上。

And thus, the strange fact of an increase of fertility in the successive generations of artificially fertilised hybrids, in contrast with those spontaneously self-fertilised, may, as I believe, be accounted for by too close interbreeding having been avoided.

混合性质。 因此，与自发受精的杂交后代相比， 人工受精的杂交后代生育率增加的奇怪事实，我相信，可能是由于避免了过于接近的杂交。