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科学家：屎壳郎为世上力量最大的昆虫[文章来自:考试与评价 http://www.trgroup.com.cn/te/ UYht!A$ )o` &Y&`Exp]
Dung beetle is world's strongest insect: study[文章版权 禁止转载:考试与评价 http://www.trgroup.com.cn/te/ ML:C[.?nTwln^_FroG]
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The world's strongest insect is a type of male dung beetle which needs its power to be able to mate with females in animal faeces, British and Australian scientists said Wednesday.[文章版权 禁止转载:考试与评价 http://www.trgroup.com.cn/te/ 5Y$VbPf=E|~?!+esW=FroG]
Onthophagus taurus can pull 1,141 times its own body weight -- the equivalent of a 70-kilogramme (154-pound) person being able to lift 80 tonnes, the weight of six double-decker buses.[文章版权 禁止转载:考试与评价 http://www.trgroup.com.cn/te/ -mT?mU`kJGBDA47UFroG]
The extraordinary strength of many of the beetles is due to their unusual mating arrangements.[文章版权 禁止转载:考试与评价 http://www.trgroup.com.cn/te/ Z$VEAi90jSoK~ C=|SBFroG]
Even weaker members of the species have a compensating trait in evolutionary terms -- huge testicles which increase their chances of fertilising a female.[文章版权 禁止转载:考试与评价 http://www.trgroup.com.cn/te/ pnu 2 Ratr2 0F$aFroG]
"Insects are well known for being able to perform amazing feats of strength and it's all on account of their curious sex lives," said Dr Rob Knell of Queen Mary,[文章版权 禁止转载:考试与评价 http://www.trgroup.com.cn/te/ !]z T+QRC1dh=|}QFroG]
"Female beetles of this species dig tunnels under a dung pat, where males mate with them.[文章版权 禁止转载:考试与评价 http://www.trgroup.com.cn/te/ 76Wq*GA^ZXBsOE6~FroG]
"If a male enters a tunnel that is already occupied by a rival, they fight by locking horns and try to push each other out."[文章版权 禁止转载:考试与评价 http://www.trgroup.com.cn/te/ H"�ZNfV k]5 1H\ NKFroG]
Knell added that some male dung beetles are smaller and weaker, but do not have to fight for female attention due to their "substantially bigger testicles".[文章版权 禁止转载:考试与评价 http://www.trgroup.com.cn/te/ gSfa*N$ *TSo ;U[FroG]
"This suggests they sneak behind the back of the other male, waiting until he's looking the other way for a chance to mate with the female," he said.[文章版权 禁止转载:考试与评价 http://www.trgroup.com.cn/te/ mD,bPL w"^+Je9) izFroG]
"Instead of growing super strength to fight for a female, they grow lots more sperm to increase their chances of fertilising her eggs and fathering the next generation."[文章版权 禁止转载:考试与评价 http://www.trgroup.com.cn/te/ ?bq*G4\l xUU g|hg_FroG]
Onthophagus taurus's amazing feats of strength are chronicled by Knell and Professor Leigh Simmons of the[文章版权 禁止转载:考试与评价 http://www.trgroup.com.cn/te/ u--mGg&{rXo?~b#OFroG]
英国和澳大利亚科学家本周三称，全世界力量最大的昆虫是一种雄性屎壳郎，这种屎壳郎需要很大的力量才能在动物粪便中与雌性屎壳郎交配。[文章版权 禁止转载:考试与评价 http://www.trgroup.com.cn/te/ USFx=r. gN�lFroG]
屎壳郎可拖动相当于其身体重量1141倍的物体，这相当于一个体重[文章版权 禁止转载:考试与评价 http://www.trgroup.com.cn/te/ |MslBQ=hk5{r F FroG]
很多这种屎壳郎的惊人力量源于它们特殊的交配形式。[文章版权 禁止转载:考试与评价 http://www.trgroup.com.cn/te/ XxQVl3[!n#FP8fA9 \/ FroG]
但这一物种中即便“体质”较弱的成员在进化过程中也形成了一种补偿性特质，即巨大的睾丸，这一特征会增大它们与雌性屎壳郎交配成功的几率。[文章版权 禁止转载:考试与评价 http://www.trgroup.com.cn/te/ m N- =C{p3 �Mvb FroG]
其中一名研究人员、伦敦大学玛丽皇后学院的罗布•克奈尔博士说：“昆虫以其惊人的力量而著称，这主要归因于它们奇特的交配方式。”[文章版权 禁止转载:考试与评价 http://www.trgroup.com.cn/te/ O up)/Ddalq2 iL FroG]
“该物种的雌蜣螂会在粪块下打洞，在那里等待雄蜣螂前来与它们交配。[文章版权 禁止转载:考试与评价 http://www.trgroup.com.cn/te/ Hf1hkNa?x~'#~ZzFroG]
“如果一只雄蜣螂进入一个已经被对手占据的洞穴，它们就会用触角抗衡，相互搏斗，努力把对方挤出去。”[文章版权 禁止转载:考试与评价 http://www.trgroup.com.cn/te/ u ,B)E;]D?u5CBFroG]
克奈尔说，有一些雄蜣螂体积较小，力量较弱，但它们不需要通过搏斗来吸引雌蜣螂的注意，因为它们的“睾丸相当大”。[文章版权 禁止转载:考试与评价 http://www.trgroup.com.cn/te/ \qshn cQ'??# =T_e;"FroG]
他说：“它们会躲在另一只雄蜣螂的背后，趁其不备时与雌蜣螂进行交配。”[文章版权 禁止转载:考试与评价 http://www.trgroup.com.cn/te/ $C0?LaEftp%BJQFroG]
“这种雄蜣螂会产生很多精子来增加让雌蜣螂受孕的几率，从而繁衍出下一代，而不是凭借力气来博得雌蜣螂的青睐。”[文章版权 禁止转载:考试与评价 http://www.trgroup.com.cn/te/ YcY'a 9ECvvFroG]
有关屎壳郎惊人力量的研究报告由克奈尔和西澳大学的雷•西[文章版权 禁止转载:考试与评价 http://www.trgroup.com.cn/te/ h-9[!bf)jBA.B(`r*uFroG]
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