逃避天敵襲擊:南非海域上演沙丁魚群大逃亡奇觀
文章來源: 卜人 於
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南非海域上演沙丁魚群大逃亡奇觀
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塘鵝從上方俯衝下來追逐沙丁魚
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幾隻海豚從下麵遊入沙丁魚群
北京時間11月14日消息,據英國《每日郵報》報道,為了逃避一群天敵的襲擊,成千上萬隻銀色沙丁魚驚恐地閃身遊過。幾隻海豚從下麵遊入沙丁魚群,黑鰭鯊和虎鯊上遊捕食,塘鵝從上方俯衝下來追逐。
浩浩蕩蕩的沙丁魚遷徙真可謂海邊不容錯過的自然奇觀,自然也“吸引”了鯊魚、海豚和其他捕食者的注意,一場捕食大戰很快爆發了,霎時間整個淺灘陷入一片混亂。這就是著名的“沙丁魚大逃亡”,是每年6、7月間鯊魚為尋找冷水浮遊動物在南非東部誇祖魯-納托爾海岸上演的一幕自然奇景。
沙丁魚本能的集體移動是為了迷惑天敵,但是,有道是道高一尺,魔高一丈,它們的天敵也學會了團結合作,四麵夾攻。這樣的壯觀場景曾經常發生在歐洲和美洲海洋中,但是,後來因長期捕撈沙丁魚,這些海域已經很少能看到“沙丁魚大逃亡”的壯美景觀了。
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