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Baby Shark

2025/6/20
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People
C
Chris Lowe
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Claudia Guy
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Greg
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Latif
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Lulu
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Nick Delvey
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Rachael Cusick
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Topics
Rachael Cusick: 我想了解小鲨鱼是如何出生的，以及 Greg 是如何通过营救死鲨鱼的卵来为鲨鱼保护做出贡献的。我发现鲨鱼的繁殖方式非常多样，而且 Greg 的故事非常感人。 Claudia Guy: 鲨鱼的繁殖方式有很多种，包括卵胎生、卵生和卵胎生。卵胎生鲨鱼会生出活的小鲨鱼，就像哺乳动物一样。卵生鲨鱼将胚胎放在卵壳中，然后将卵释放到海洋中。卵胎生是指胚胎在卵中形成，但在母亲体内孵化，然后小鲨鱼出生。其中沙虎鲨在子宫内通过吃掉自己的兄弟姐妹来变得强壮。 Greg: 我在马耳他创立了一个鲨鱼保护和教育组织，并通过在鱼市收集死鲨鱼的卵来孵化小鲨鱼，然后将它们放回大海。我希望通过这种方式来为鲨鱼保护做出贡献。虽然我最初的尝试并不成功，但我最终成功地孵化出了小鲨鱼，并将其放回了大海。我降低了水族箱的温度，鲨鱼卵的存活率大大提高。迄今为止，我们已经放生了 371 条鲨鱼。

Deep Dive

Chapters
This chapter explores the fascinating world of shark reproduction, covering three main categories: viviparous, ovoviviparous, and oviparous. It highlights the unique strategies sharks employ to ensure the survival of their offspring, from nurturing embryos in a milk bath to the extreme intrauterine cannibalism of sand tiger sharks.
  • Three categories of shark birth: viviparous, ovoviviparous, and oviparous.
  • Sand tiger sharks exhibit intrauterine cannibalism.
  • Oviparous sharks lay eggs, some with unique shapes like spiral drills.

Shownotes Transcript

This is episode five of Swimming with Shadows: A Radiolab Week of Sharks.

Today, the strange, squirmy magic behind how sharks make more sharks. Drills. Drama. Death. Even a coliseum of baby sharks duking it out inside mom’s womb. And a man on a small island in the Mediterranean trying, against all odds, to give baby sharks a chance in a little plastic aquarium in his living room. Can a human raise a shark? And if so, what good is that for sharks? And for us? Doo doo doo doo doo doo.

Special thanks to Jaime Penadés Suay and la Fundación Azul Marino.)

**EPISODE CREDITS: **Reported by - Rachael CusickProduced by - Rachael Cusickwith mixing help from - Jeremy BloomFact-checking by - Diane Kellyand Edited by  - Pat Walters

EPISODE CITATIONS:

Articles - Claudia’s original reporting that inspired the episode)

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Leadership support for Radiolab’s science programming is provided by the Gordon and Betty Moore Foundation, Science Sandbox, a Simons Foundation Initiative, and the John Templeton Foundation. Foundational support for Radiolab was provided by the Alfred P. Sloan Foundation.