▲美国佛州坦帕市中心。
美国佛州坦帕(Tampa)居民多年来饱受噪音困扰,许多人报警表示,他们不断听见海湾传来奇怪的「砰砰声」,但没人知道确切来源是什么。如今,海洋科学家洛卡西奥(James
Locascio)已经确定,这是黑鼓鱼(black drum fish)在水下大声交配的声音。
至少从2021年开始,坦帕居民一直被这种深沉低频的噪音所苦,于是委托科学家进行调查,甚至在募资网站GoFundMe筹措研究经费。负责人希莉(Sara
Healy)说,「对我来说,如此固执地追究这件事似乎有点蠢,但在另一个层面上,这对社区来说,是很重要的事情。」
▼坦帕居民长年听到的诡异噪音。
洛卡西奥受托后,把录音设备放置在水下,证实了假说。他向《华盛顿邮报》解释,黑鼓鱼透过鱼鳔周围的肌肉收缩,产生这种类似鼓声的声音,「这是一种低频声音,因此传播地更好、更远,能够更有效通过不同媒介」,甚至可以在陆地上传播。这或许解释了,为何居民住在距离海湾超过1英里(约1.6公里)之外的地方,却仍能听见噪音。
▲黑鼓鱼(black drum fish)。
洛卡西奥是非营利研究组织「莫特海洋实验室」(Mote Marine Laboratory and
Aquarium)的渔业项目主任,2005年完成了关于黑鼓鱼的论文,过去也曾协助坦帕以南约100英里(约161公里)的科勒尔角(Cape
Coral)和蓬塔戈尔达(Punta Gorda)解开类似谜团。
他坦言,「这是一个颇为罕见的现象。人们对此感到惊讶,因为它并非众所皆知。」
迈阿密先驱报报导,大约就在去年的这个时候,蓬塔戈尔达官员也向居民证实,许多人通报的怪声音,来自「在产卵季节」的黑鼓鱼。
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