《甘蔗蟾蜍》，一段不寻常的历史，是一部难得一见的片子。它讲述了澳大利亚生物学上一个奇特的真实故事。1935年，为了使国家主要作物甘蔗免遭灰壳甲虫的破坏，昆士兰ZF从夏威夷引进了一批甘蔗蟾蜍。但它们的繁殖速度相当迅速，以至变成了当地的一大公害。
70年前，澳大利亚昆士兰州引进一种蔗蟾蜍以对付甘蔗田里的害虫。如今，这种蟾蜍已经进化成“同类中的强者”，对本地物种构成了威胁。
悉尼大学生物科学家理查德·希恩在新一期《自然》杂志上撰文说：“我们发现这种蟾蜍的腿部较长，不仅能够跳得更快，首先到达新领地，而且领先的蔗蟾蜍比年长的同类腿部也要长。
悉尼大学的研究人员在这场生物“入侵”的最前线――达尔文市以东６０公里处，连续观察蔗蟾蜍达１０个月，发现它们在潮湿环境下一晚能够跳１．８公里远，打破了青蛙蟾蜍世界中的“夜行世界纪录”。
此外，最早到达观测地的蔗蟾蜍的腿普遍比...
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