SCIENCE IN THE NEWS DAILY
Shark "Virgin Birth" Confirmed
from National Geographic News
A female blacktip shark in Virginia fertilized her own egg without mating with a male shark, new DNA evidence shows. This is the second time scientists have used DNA testing to verify shark parthenogenesis—the process that allows females of some species to produce offspring without sperm.
The female shark, dubbed Tidbit, died during a routine physical exam before the pregnancy was identified. A necropsy—an animal autopsy—after her death revealed she was carrying a near-term pup fetus that was about 12 inches (30 centimeters) in length.
Tidbit was caught in the wild when she was very young and reached sexual maturity in a tank at the Virginia Aquarium in Virginia Beach, where she lived for eight years.
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