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Can two female sharks have a baby?

Some female sharks are so self-sufficient they don't even need a male shark to have babies! Females from at least two different species of sharks that were separated from males have had pups without mating. Genetic testing showed that the baby sharks, also known as pups, only carried the female's DNA.

fisheries.noaa.gov - Five Wild Facts About Shark Reproduction | NOAA Fisheries
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In our ongoing effort to help you #KnowSharksBetter, we wanted to share some lesser-known facts about how sharks make more sharks!

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Who Runs the World?

Some female sharks are so self-sufficient they don't even need a male shark to have babies! Females from at least two different species of sharks that were separated from males have had pups without mating. Genetic testing showed that the baby sharks, also known as pups, only carried the female’s DNA. This indicates they had been conceived by asexual reproduction. When females do mate with a male, sometimes it’s more than one. Female sharks have been known to use the sperm from multiple males when they reproduce—meaning that pups in one litter could be half-siblings.

It's a Pup-Eat-Pup World

Sharks will eliminate all competition--even in the family. The largest embryo in a shark litter sometimes eats its brothers and sisters in the womb! It’s called “intrauterine cannibalism." Researchers studying sand tiger sharks noted there might be 12 in the womb but the biggest will consume the rest. This allow sharks to have 1-2 bigger babies at birth and increases the odds of survival.

104 Weeks Along

Some shark species carry their young in their womb, similar to mammals. The spiny dogfish shark can be pregnant for up to 24 months—making it the longest gestation period of any vertebrate. And you thought 9 months seemed like a long time!

135 and Counting

While the number of pups in a litter varies widely depending on the species, some sharks can give birth to huge litters. For example, the blue shark is known to give birth to as many as 135 pups in a single litter. Imagine that daycare tuition!

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What is the full name of Ollie?

Oliver Ollie is a given name and a nickname, often as a shortened form of Oliver, Olive, Olympia, Olga or Olivia. Variants include Olie, Oli, Oly and Olly.

en.wikipedia.org - Ollie - Wikipedia

This article is about people with names related to Ollie. For other uses, see Ollie (disambiguation) Ollie is a given name and a nickname, often as a shortened form of Oliver, Olive, Olympia, Olga or Olivia. Variants include Olie, Oli, Oly and Olly.

People [ edit ]

Given name [ edit ]

Olie [ edit ]

Olie Cordill (1916–1988), American football player

Olié Koffi, (born 1984), Ivorian footballer

Olaf Kölzig (born 1970), German former goaltender known as "Olie the Goalie"

Olie Sundstrom (born 1968), retired Swedish ice hockey goaltender

Oliver [ edit ]

Olivia [ edit ]

Ollie Rae (born 1988), Scottish cricketer

Olga [ edit ]

Olly Donner - Finnish writer

Other [ edit ]

Alan Gelfand (born 1963), known by the nickname "Ollie", American inventor of the Ollie (skateboarding) trick Ian Holloway (born 1963), known by the nickname "Ollie", British football manager and former player

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