Clipping Board » New Knowledge and the Unknown of Life ─ Life will always bring you surprises and wonders.
Update Date: 2008/10/15 14:20 by Jian Changsheng
(AFP, Washington, 14th)
Researchers confirmed today that a baby shark appears to have been born without the mother shark mating with a male shark. This is the second similar case discovered by researchers.
According to a report in the "Journal of Fish Biology" over the weekend, the study seems to indicate that female sharks can reproduce without the eggs being fertilized by a male shark.
The lead author of the study, shark expert Chapman from the Marine Conservation Science Institute at the State University of New York, said that DNA tests on the baby shark confirmed it had no father.
The baby shark is the offspring of a blacktip shark named "Tidbit," which has lived in an aquarium in Virginia for eight years but has never been in contact with a male shark.
Scientists say this is the second confirmed case of a shark becoming pregnant through parthenogenesis, a process in which an unfertilized egg develops into a new individual.
Until now, it was generally believed that parthenogenesis only occurred in certain insects, spiders, centipedes, and crustaceans.
Source: http:/ / tw. news. yahoo. com/ art……url/ d/ a/ 081015/ 19/ 17oh1. html
Scientists Discover Second Case of Shark Asexual Reproduction
(AFP, Washington, 14th)
Researchers confirmed today that a baby shark appears to have been born without the mother shark mating with a male shark. This is the second similar case discovered by researchers.
According to a report in the "Journal of Fish Biology" over the weekend, the study seems to indicate that female sharks can reproduce without the eggs being fertilized by a male shark.
The lead author of the study, shark expert Chapman from the Marine Conservation Science Institute at the State University of New York, said that DNA tests on the baby shark confirmed it had no father.
The baby shark is the offspring of a blacktip shark named "Tidbit," which has lived in an aquarium in Virginia for eight years but has never been in contact with a male shark.
Scientists say this is the second confirmed case of a shark becoming pregnant through parthenogenesis, a process in which an unfertilized egg develops into a new individual.
Until now, it was generally believed that parthenogenesis only occurred in certain insects, spiders, centipedes, and crustaceans.
Source: http:/ / tw. news. yahoo. com/ art……url/ d/ a/ 081015/ 19/ 17oh1. html