英語聽力文摘487 小猴子如何表達愛

00:00

00:00

MP3下載 文本下載

https://online2.tingclass.net/lesson/shi0529/0007/7643/487.mp3

https://image.tingclass.net/statics/js/2012

小猴子表達如何愛

狨猴(Marmoset)，又稱指猴，是生活在在南美洲亞馬遜河流域的森林中的一種世界上最小的猴子。這種猴長大后身高僅10—12厘米，重80—100克。新生猴只有蠶豆般大小，重13克。這種猴子喜歡捉虱子吃，且性格溫和，因此飼養(yǎng)它們便成了當?shù)赜〉诎踩说氖群谩?/p>

Marmosets are small primates. Think of a monkey with huge fuzzy ears. Primatologists have often wondered whether nonhuman males evaluated their potential mates, or whether their sex drive was more like an on/off switch.

We may think of animals as just responding to sexual invitations without thinking, but a study conducted in both the U.S. and Germany shows this isn’t necessarily so. Male marmosets having their brains scanned were given sniffs of genital-gland secretions from ovulating females.

That’s a scent that should trigger a mating response in the brain, and it did! But guess what else happened? Many other brain areas lit up as well, such as memory formation, information integration–in other words, areas associated with decision-making.

Researchers are still studying the effect, but apparently a lot more happens in a marmoset brain than a simple “have sex now” program. The specific areas of brain activity suggest that the males are evaluating potential mates before agreeing to a sexual union.

This makes special sense for marmosets, because they are monogamous and both partners raise the offspring. Under those circumstances you wouldn’t want to enter into a relationship without any thought.

絨猴是很小的靈長類。試想一下，猴子長者一對大大的毛絨絨的耳朵。動物學家時常有這樣的疑惑：雄性動物選擇“另一半”或者控制性欲是否更像是一個開關(guān)鍵。

我們也許會認為動物對于性邀請基本是不假思索的，但最近美國和德國有研究稱事實并非如此。雄性絨猴用它們的大腦掃描，聞?wù)谂怕训拇判詣游锷诚俚姆置谖铩?/p>

有一種氣味會引起大腦里的交配反應(yīng)，這樣它們才會進行交配。但你猜還會發(fā)生什么情況?很多其它的大腦葉都會被“激活”，像信息形成，信息整合，也就是說，所有和決策相關(guān)的區(qū)域。

研究人員還在觀察其影響，但很顯然，絨猴的腦部有很多活動而不是一個簡單的“性行為”指定。特定區(qū)域的大腦活動暗示雄性絨猴

在性結(jié)合之前會評估潛在的交配對象。

這對于絨猴有特殊的意義，因為它們是單配制，并且共同撫養(yǎng)后代。在這種情況下，就不會不假思索地介入這段關(guān)系了。