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渔民捕获巨型海鱼 大小如卡车轮胎(组图)

2017-05-24 08:45:02   中国青年网

5月23日报道,美国加州,一只体型奇怪,体重达90磅(41kg),大小和卡车轮胎差不多的巨型海鱼在沿海被当地渔民被捕捞上岸。

这种鱼被称为月亮鱼。由于它们大多生活在海平面400米以下,靠捕食小鱼和鱿鱼为生因此通常很少被渔民捕获。上周,这只身上带有白色斑点巨型月亮鱼,在美国加利福尼亚奥克斯纳德附近海域被一名叫肖恩的渔夫捕获。

据了解,这种鱼是目前已知的唯一一种和哺乳动物、鸟类一样体温恒定的鱼类。研究人员表示,这种隐藏在深海的巨型鱼类可以利用其恒温的优势在寒冷的海洋深处成为强有力的捕食者。

虽然金枪鱼和部分鲨鱼能在深海捕食时维持身体某些部位的温度,但他们必须及时浮出水面,不然心脏这样的器官会受到冷水的侵蚀。而月亮鱼可通过不断煽动自己的胸鳍来产生热量,它的肌肉温度平均比周围的海水高出约4-5摄氏度。这种独特的身体结构能够保证月亮鱼即使处在冰冷的海水中,身体也不会失温。

图为渔民捕获月亮鱼的地图截图。

责任编辑:刘敏丹 CN012
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