[新聞] 南非殺人鯨開戰 半月咬死3頭大白鯊消失
1.媒體來源:
蘋果
2.完整新聞標題:
【頂上戰爭】南非殺人鯨開戰 半月咬死3頭大白鯊
3.完整新聞內文:
http://bit.ly/2rjNiOx
海洋專家表示,兩大海洋殺手殺人鯨與大白鯊,在南非的互鬥情況愈來愈激烈,半個月來
至少有3頭大白鯊被獵殺。專家們認為,如此頻繁的獵殺行為實在罕見,相信是殺人鯨的
食物不足,才會把目標轉到大白鯊身上。
日前已有報導指,南非的觀鯊熱門景點杭斯拜(Gansbaai)頻現大白鯊屍體,牠們的肝臟
都「失蹤」,成了殺人鯨的食糧。一直在當地展開研究的生物學家湯納(Alison Towner
)表示,殺人鯨襲擊大白鯊雖然偶有聽聞,但之前從未在南非發生過,她認為是殺人鯨的
其他食物因污染或氣候轉變而減少,令牠們改為獵食大白鯊。
殺人鯨被喻為「海中之狼」,牠們會群體出動獵食,每天可狼吞200公斤食物。湯納稱,
殺人鯨彼此合作得很好,「兩頭殺人鯨會咬住(大白鯊)胸鰭,再向外拉,撕開牠來取得
肝臟」。大白鯊的肝臟可重逾60公斤,且含有豐富的有機化合物「鯊烯」(squalene),
對殺人鯨來說是很不錯的食物來源。
研究殺人鯨的學者維瑟(Ingrid Visser)指,殺人鯨獵食時會製造強大暗流,迫使鯊魚
游近水面,然後趁這個時機出擊。不過殺人鯨並沒有吃掉大白鯊的屍身,只對肝臟有興趣
。(國際中心/綜合外電報導)
http://bit.ly/2qlISZW
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4.完整新聞連結 (或短網址):
http://bit.ly/2pP8pb6
5.備註:
......
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