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17 May, 2012 Thu
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今集以土地的侵略者為主題，介紹兩棲動物怎樣設法侵略土地。土地侵略者其實是展示做父母的技能。有些兩棲動物的母親，會分泌一種像牛奶的分泌物，確保兒女不受傷害的情況下才進行餵養。 另外會介紹澳洲一種有袋的青蛙，其臀部有一個守衛青蛙卵的皮囊，保護蛙卵直至準備孵化成白色小蝌蚪。最後，攝製隊在巴拿馬遇上罕見的金黃青蛙；還有主持人在澳洲的沙漠差點被烘烤，原因何在？主持人發現沙漠特色蟾蜍能居住於沙漠長達兩年滴水不沾，真正證明兩棲動物切切實實的征服了土地。
Among chorusing frogs in Panama, Sir David Attenborough asks how amphibians first managed to invade the land. The Australian lungfish, an ancient relative of the amphibians that can breathe air, and the giant Japanese salamander, one of the largest amphibians on Earth, give vital clues about their first tentative steps. These giant land invaders also demonstrate fiercely protective parenting skills.
In a disused goldmine, David finds salamanders that no longer need water. The mine walls glisten with dozens of female western slimy salamanders guarding their eggs and young. They are ready to put up a fight against other predatory hungry females, who see their young as a source of nourishment.
The primitive worm-like caecilians demonstrate parental care never filmed before. The mother produces a rich secretion and the young lap it up like milk and, more bizarrely, they also eat her skin, tearing at it like mini sharks. She is unharmed and regularly feeds her babies in this way. |
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爬行動物最大的特色，就是五顏六色的膚色轉變，這亦是它們的通信指標。它們的居住、生活方式都沒有特定的時間表，即使與它們的父母比較，也可以是完全不同……以上的種種大自然生態，《冷血世界》會陸續為大家披露。
今集先帶大家觀察在加拉帕戈斯群島的蜥蜴是怎麼取暖的。原來牠們會找不同的新穎熱源，例如用盡在陽光下的驚人熱量，找出最熱的岩石並與之作伴，直到他們和岩石一樣溫暖。 爬行動物不會浪費他們的能量，相反，牠們會非常高效率地使用太陽能。驚人地，他們的肝臟可以在兩天內加倍增大，而他們的心臟功能更可以增長40%。節目最後更會解說體積最大的冷血動物—恐龍，它們又是如何收集熱能、以及如何把熱能留在體內。
Reptiles and amphibians are as dramatic in combat, colourful in their communication and tender in their parental care as other animals. They also live their lives on a totally different time scale and harness their energy from the sun. The Cold Blooded Truth reveals the secret of their success.
Sir David Attenborough begins the story on the Galapagos Islands, among massed ranks of marine iguanas. Stunning thermal imagery reveal how these lizards bask in the sun until they are as warm as he is, and then pour like hot golden lava into the cold sea as the heat they have accumulated powers their dives. |
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