Scientists: Second case of 'virgin birth' in a shark
ثبت نشده
چکیده
In May 2007, the 5-foot, 94-pound shark died of stress-related complications related to her unknown pregnancy after undergoing a yearly checkup. The 10-inch shark pup was found during a necropsy of Tidbit, surprising aquarium officials. They initially thought the embryonic pup was either a product of a virgin birth or a cross between the blacktip and a male of another shark species which has never been documented, Chapman said.
منابع مشابه
Another Shark "Virgin Birth" Confirmed
In May 2007, the 5-foot, 94-pound shark died of stress-related complications related to her unknown pregnancy after undergoing a yearly checkup. The 10-inch shark pup was found during a necropsy of Tidbit, surprising aquarium officials. They initially thought the embryonic pup was either a product of a virgin birth or a cross between the blacktip and a male of another shark species which has ne...
متن کاملShark virgin birth produces multiple, viable offspring.
Facultative automictic parthenogenesis has only recently been confirmed in the most ancient jawed vertebrates, the chondrichthyan fishes (sharks, batoids, and chimeras). To date, however, in both documented cases, the females have only produced a single parthenogen offspring, and none of these have lived for more than 3 days. We present a genetically verified case of automictic parthenogenesis ...
متن کاملVirgin birth in a hammerhead shark.
Parthenogenesis has been documented in all major jawed vertebrate lineages except mammals and cartilaginous fishes (class Chondrichthyes: sharks, batoids and chimeras). Reports of captive female sharks giving birth despite being held in the extended absence of males have generally been ascribed to prior matings coupled with long-term sperm storage by the females. Here, we provide the first gene...
متن کاملA Case Report of Pelvic Tuberculosis in a 12-Year-Old Virgin Girl
Background: In virgin girls pelvic tuberculosis is rare, and due to nonspecific symptoms and radiographic studies, there is a possibility of misdiagnosis, and mortality so strong clinical suspicion, especially in girls exposed to tuberculosis is important in diagnosing the disease. This study reports a case of pelvic tuberculosis in a 12-year-old virgin girl. Case Presentation: In this case st...
متن کاملResearch Article: Do derived whitecheek shark proteins motivate T cells to fight cancer cells? A case study in using SW742 cell line
Shark cartilage is considered as a natural dietary supplement consisting of anti-angiogenic, immunostimulatory, and anti-inflammatory characteristics. Therefore, this study was designed to inspect the possibility that whitecheek shark (Carcharhinus dussumieri) cartilage proteins motivate expression of NKG2D, CXCR3, NKP46, and NKP44 receptors on natural killer cells and their activities against ...
متن کامل