Home > Biology, Fish > Female sharks can apparently fertilize own eggs

Female sharks can apparently fertilize own eggs

May 22, 2007

AP is reporting:

Female sharks can fertilize their own eggs and give birth without sperm from males, according to a new study of the asexual reproduction of a hammerhead in a U.S. zoo.

The joint Northern Ireland-U.S. research, being published Wednesday in the Royal Society’s peer-reviewed Biology Letter journal, analyzed the DNA of a shark born in 2001 in the Henry Doorly Zoo in Omaha, Neb. The shark was born in a tank with three potential mothers, none of whom had contact with a male hammerhead for at least three years.

The baby was killed within hours of its birth by a stingray in the same tank. Analysis of its DNA found no trace of any chromosomal contribution from a male partner.

Shark experts said this was the first confirmed case in a shark of parthenogenesis, which is derived from Greek and means “virgin birth.”

More here.

  1. Sean
    September 17, 2007 at 8:54 pm

    The Arizona Republic is is reporting a similar occurance at Carl Hayden High School.

  2. Sean
    November 13, 2007 at 10:32 pm

    Carl Hayden High’s “lone shark” is expecting again.

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