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在巴西的马米拉亚自然保护区中,生活着一种被称为“活化石”的巨骨舌鱼。这种鱼是世界上最大的淡水鱼之一,成鱼体长可达2-6米,重可达100千克。
巨骨舌鱼有着一个特点,那就是笨。其体型笨重,行动迟缓。渔民们经常只需要等它浮上水面呼吸时用木棍将它打晕即可。
不过巨骨舌鱼同时拥有强大的蛮力,利用尾巴作为武器,可以轻易击倒成年的男性,并击碎骨骼造成大量内伤,所以渔民捕鱼的时候也需要小心。
巨骨舌鱼具有庞大的经济价值。一条巨骨舌鱼平均有70千克的鱼肉。鱼鳞片大且硬,可磨成爪刀。牙齿晒干后可用来代替锉具。可以说浑身都是宝。
不过这种易捕获,高价值的鱼自十八世纪初以来就成了密集捕捞的对象,在2012年被列为濒危物种。
在巴西,土著居民在当地政府的许可下,可以猎杀一定数量的巨骨舌鱼作为食用,但数量和鱼的大小都有严格限制。
同时巨骨舌鱼的人工繁殖技术也正在发展,东南亚的一些大鱼场已经开始引入这种鱼并着手人工繁殖。
责任编辑:刘敏丹 CN012
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