Chattanooga Zoo Komodo Dragon Hatchling DNA Results

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03/03/20

Chattanooga, TN​ – In September 2019, the Chattanooga Zoo was pleased to announce the first successful Komodo dragon hatchlings by first-time mother, Charlie, through the recommendations of the AZA’s Species Survival Plan (SSP).  At that time, it was unknown if the offspring were a product of breeding between Charlie and the zoo’s resident male, Kadal, or if parthenogenesis had occurred.

Parthenogenesis is a type of reproduction where the female produces offspring without male fertilization. In the wild, Komodo dragons mainly live isolated and often become violent when approached, which has allowed these animals to evolve to reproduce both sexually and parthenogenetically. Female Komodo dragons carry the sex chromosomes of WZ with males carrying ZZ. When parthenogenesis occurs, the mother can only create WW or ZZ eggs. Eggs with the sex chromosomes of WW are not viable, leaving only ZZ eggs to produce all male hatchlings. Parthenogenesis is considered a very rare phenomenon, with the first case of a successful parthenogenesis reproduction in Komodo dragons recorded in 2006.

DNA results show that the three Komodo dragon hatchlings born at the Chattanooga Zoo on August 4, 2019, were reproduced through parthenogenesis. The six-month-old brothers, named Onyx, Jasper, and Flint, are growing rapidly and doing very well. Although Kadal and Charlie were placed together in hopes of breeding, the Chattanooga Zoo staff is very excited to witness this monumental work of nature and be part of such an important conservation program.  “​Our staff is thrilled to play a part and to be able to witness this truly miraculous occurrence. As the Komodo dragon is listed as vulnerable to extinction, these hatchlings are even more special and represent a bright future for their species,”says Dardenelle Long, Chattanooga Zoo CEO and President.

 

The 14-acre Chattanooga Zoo (historically referred to as the Chattanooga Zoo at Warner Park) is accredited by the national Association of Zoos and Aquariums (AZA), assuring the highest standards of animal care and husbandry. The Zoo is dedicated to its mission of engaging and inspiring all citizens of the community to better understand and preserve wildlife by creating meaningful connections between people and animals. With its intimate, innovative exhibits, wide-ranging education offerings and commitment to conservation, the Chattanooga Zoo fills a unique niche within the community. The Zoo is open daily from 9 a.m. to 5 p.m. with the exception of Thanksgiving, Christmas and New Year’s Day. For more information, visit www.chattzoo.org.

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