蚊子的选择揭秘:为什么咬我不咬他?

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ers.
‘‘All the lab employees rubbed petri dishes a- gainst their stom achs. In that w ay, their scents were deposited on the dishes,which were th en put in an enclosure full of m osquitoes,”he says.
英语衄 。
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tion are. But research does indicate that som e scents are m ore attractive to m osquitoes than oth——
“The m osquitoes repeatedly landed on some of t he petri dishes.but diБайду номын сангаасl’t go anywhere near th e others.”
Perhaps taking inspiration from popular tic—— tion,there are also t hose who swea r by gar lic as an excellent repellent against the w inged blood- suckers.According to the researcher,though un— substantiated, this s ̄ategy m ay not be entirely fr u itless: There m ay be something to the theory that it’S possible to m ask people’S scent with g lic.
“W hen t he mosquito com es closer. it uses sm ell,heat and carbon dioxide to decide wheth er to bite.But if it is confused by a repellent,it will never get t hat fa r ,” says Jensen.However, even repellents do not provide complete protection a- gainst the persistent insects.
The only reliable method of protection against m osquitoes is to use one of the effective repel—— lents.M osquito repellent contains som e smells that confuse the m osquitoes.The first thing a m osquito does when looking for prey is to see if there are any anim als or people in the vicinity.
叮咬 的代 名词 。而有些人却从 未被 蚊子叮 咬过 。那 么这些吸 血虫是如 何 选择它们 的受害对 象 的呢?
蚊虫 的 口味好 像很 随意 。然而 研 究 显 示 当蚊 子 要从 潜 在 的受 害 者 中选 择对 象 时 ,还是 气 味起 了决 定 作用 。
“蚊子会 被 每个人 都会 散 发 出 的二 氧化碳 和热 量所 吸 引 ,但 蚊子 也 会被 某些 特定 的气 味所 吸 引 。” 丹麦 阿尔胡斯大学农学部研究 的 负 责人 卡尔 ·马 丁 ·威 ·詹 森说 。根 据 他 的说 法 ,目前 还无 法 确定那 些 会 吸引蚊 子的气味 到底是哪些 。但
‘‘M osquitoes are attracted by carbon dioxide and heat, which everyone gives of. But m osquitoes a r e alSO attracted by certain scents.’’ says Ka r l-M artin Vagn Jensen,head of the De- partm ent of A griculture from A arhus University, Denm a rk. According to Jensen, it has not yet been established exactly what the scents in ques-
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hardly ever get bitten.So how do the bloodthirsty insects select their victim s?
The insects’ tastes m ay seem a rbitrary. How ever,resea r ch reveals that when m osquitoes make their choice between potential victim s,it all com es down to scent.
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