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- Ovoviviparous shark pups depend on yolk for nutrition, and when an embryo has expended its own yolk sac, it turns to the eggs around it. Some species practice intrauterine cannibalism, or eating the other fertilized or unfertilized eggs in the womb. The best-known intrauterine cannibal is the sand tiger shark.
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Apr 30, 2013 · Shark embryos cannibalize their littermates in the womb, with the largest embryo eating all but one of its siblings. Now, researchers know why: It's part of a struggle for paternity in...
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Jul 8, 2024 · Two views of a sand tiger shark embryo in September 1970 that show damage by an intrauterine attack by one of its siblings.
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Sep 3, 2024 · Researchers tracking pregnant porbeagle sharks uncovered the first evidence of the species getting eaten by an even bigger shark.
Dec 21, 2018 · The researchers think this potentially unique behaviour might come down to the way aplacental tawny nurse and sand tiger sharks feed their developing embryos. Without yolks of a placenta to sustain them, developing pups in many shark species will diet on surplus eggs .
Dec 20, 2018 · The little sharks swim around inside their mom, switching between her multiple uteruses. When they get hungry they eat her unfertilized eggs.
May 1, 2013 · Shark embryos cannibalize their littermates in the womb, with the largest embryo eating all but one of its siblings. Now, researchers know why: It's part of a struggle for paternity in utero,...
Sharks have young in three different ways. After internal fertilization, some species lay a thick egg case that encloses the shark embryo (seen in the photo here). Most species are ovoviviparous, which means that the shark hatches and develops within the female shark and is born live.
