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Sand tiger shark trivia: It eats its siblings in the womb while it’s still an embryo

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Sand tiger shark trivia: It eats its siblings in the womb while it's still an embryo
Sand tiger shark trivia: It eats its siblings in the womb while it’s still an embryo

Sand tiger sharks usually give birth to only two babies, but they can carry up to 12 embryos in the womb. About five months into a typical 12-month pregnancy, the largest embryos start to devour all but one of their cohorts, but scientists have been unable to figure out why.

It turns out that this bloody in-utero massacre was the mother’s fault, all because of the consequences of mating with multiple males.

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In 2013, a team of Marine biologists led by demian chapman of stony brook university in the United States began their research. They decided to analyze the embryos of 15 sand tiger shark mothers at different stages of development. DNA tests have shown that in the latter stages of pregnancy, the few embryos that are more likely to remain appear to have only one father. This means that embryos from the strongest fathers are competing with other embryos and winning.

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Comments 151

  1. 小澤 マリア、おざわ まりあ says:
    2 years ago

    ポルノブロッキングソフトウェアプログラムは、子供をポルノウェブサイトやさまざまな不適切なコンテンツから保護するための素晴らしいデバイスです。
    私たちは個人的ではなく、このWebサイトに表示されるコンテンツを作成します。
    コンテンツ素材の所有者のウェブサイトを宣伝する。 はい、私はそれが決まり文句であることを知っていますが、それはあなたを危険な検索から遠ざけるでしょう
    インターネット上のウェブサイト、それは本当にあなたの供給されたポルノ中毒を維持しているそれらの衝動を鎮めるのに役立ちます。
    サタンはこれをあまりにも効果的に知っているので、ポルノサイトは無邪気な笑顔の若い女性でいっぱいです。
    一部の女性は非常に野心的であり、
    他の女性とは完全に異なる興味は、彼らを男の子と名付ける動機にはなりません。
    本当に、あなたは典型的に何も言わなくてもいいのです。
    優れたクレジットスコアスコアは、数千ドル以上節約できます

    Reply
  2. 佐々木希 says:
    2 years ago

    怖いサメ、私を食べようとしている

    Reply
  3. 사설토토 says:
    2 years ago

    I am regular reader, how are you everybody? This paragraph posted at this web page is truly good.

    Reply
  4. Janedus says:
    2 years ago

    What age did you live in, now it’s 2020

    Reply
  5. Pay Day Loan says:
    2 years ago

    It ’s been too lucky for so long

    Reply
  6. Carldus says:
    2 years ago

    Why is the shark alone? Is n’t it eaten by humans? It ’s a self-righteous editor, and it ’s forced into a fantasy plot. I ’m lonely.

    Reply
  7. Boodus says:
    2 years ago

    Wake up. Alas, I’m still alive

    Reply
  8. Pauldus says:
    2 years ago

    Prove that singles can also live well

    Reply
  9. Amydus says:
    2 years ago

    I heard that the sleeping shark can live to 400 years old

    Reply
  10. Miadus says:
    2 years ago

    Your ignorance is not your fault, but it ’s your fault if you come out to scare people

    Reply
  11. Best Payday Loan says:
    2 years ago

    It didn’t think so much

    Reply
  12. Speedy Cash says:
    2 years ago

    Shark: Well, I’m smart, I don’t want to catch me

    Reply
  13. Dendus says:
    2 years ago

    Hahaha The shark speaks fluent English

    Reply
  14. online car insurance says:
    2 years ago

    The scars left by yourself to challenge others are proof of the strong. The probability of being hit by a knife in life for no reason is too small (ignored by the group), but when it is suffered, it is the disaster of extinction.

    Reply
  15. Ashdus says:
    2 years ago

    This picture looks so painful, I can’t stand it [tears]

    Reply
  16. Ugodus says:
    2 years ago

    so beautiful! Vitality is beautiful

    Reply
  17. Quick Loan says:
    2 years ago

    What is the experience of swimming with sharks? Do you feel it?

    Reply
  18. Eyedus says:
    2 years ago

    It ’s so exciting to be able to play with sharks, the problem is I ca n’t swim

    Reply
  19. Wimdus says:
    2 years ago

    How does it feel to swim with shark fins? It must be exciting?

    Reply
  20. geico auto insurance says:
    2 years ago

    It is worthy of being a creature that has existed on the earth for 500 million years, and is a killer in the womb.

    Reply
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