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cover of episode Sharks — From Fear to Fascination

Sharks — From Fear to Fascination

2024/7/26
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The Pulse

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A
AJ Rotendeller
A
Andy Danochuk
J
Jasmine Graham
J
John Long
J
John Mohan
R
Reina Onan
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John Long: 我在南澳大利亚海岸的船上,周围都是大白鲨,这非常可怕。许多澳大利亚人害怕鲨鱼,这是有原因的。澳大利亚每年因鲨鱼袭击死亡的人数并不多,但事件本身非常可怕。鲨鱼会观察你,它们是强大而迅速的掠食者。《大白鲨》吓坏了我。《大白鲨》和过度捕捞对鲨鱼造成了毁灭性的影响。北大西洋的白鲨数量在《大白鲨》电影上映后的五年内下降了约 70%。北大西洋的白鲨需要 26 到 31 年才能性成熟,恢复种群可能需要 50 到 100 年。

Deep Dive

Chapters
This chapter explores the history of sharks, their unique adaptations, and their ability to survive all five mass extinction events. It focuses on their dental plasticity, the strength and flexibility of their teeth, and their unique cartilage.
  • Sharks have survived all five mass extinction events.
  • Shark teeth are highly adaptable, grow back, and allow them to eat a wide range of prey.
  • Sharks' unique cartilage is strong, flexible, and lightweight.

Shownotes Transcript

Before dinosaurs, before trees — even before Saturn had its rings – there were sharks. The fierce predators have been swimming in our oceans for hundreds of millions of years, standing the test of time as they survived all five of Earth's mass extinction events.Now, though, many of them face unprecedented threats, from overfishing to climate change. But there's a movement underway to protect sharks — and to change their public image, which suffered after the classic movie Jaws.On this episode, we explore the secret lives of sharks, and what can be done to help these ancient predators survive. We learn about the history of sharks, and what's made them so adaptable; hear about how some fishermen are helping to save them; and find out what the historical record can teach us about the largest, most fearsome shark to ever exist — the megalodon.Learn more about sponsor message choices: podcastchoices.com/adchoices)NPR Privacy Policy)