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当前位置:科技 > 科学博览 > 生物奇趣 > 正文

马达加斯加发现世界上最大最坚实蜘蛛网(图)(3)

2010-09-20 08:08:27 【

    3.蛛网基本结构

马达加斯加发现世界上最大最坚实蜘蛛网(图)

蛛网基本结构

    2008年,大量蜻蜓被粘在达尔文吠蛛的蛛网上。据阿格纳尔森介绍,达尔文吠蛛的蛛网基本上由两种蛛丝织成:“牵引”蛛丝被用于织出支撑股,支撑股将圆网一个个终点固定在外悬于河湖之上的树杈,形成蛛网的辐射状细丝;更具弹性和粘性的蛛丝则被用于织出捕获猎物的螺旋形结构。当昆虫撞上蛛网,它会粘在上面,它的挣扎引起蛛丝震动,提醒达尔文吠蛛有猎物上钩。达尔文吠蛛马上爬向被捕获的猎物,用蛛丝将其围成蚕茧状,最终慢慢享用。与多数蜘蛛不同的是,达尔文吠蛛有时会将多个昆虫尸体包裹成一个蚕茧,等到以后将其吃掉。

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