Vets and keepers confirm giant panda Jia Jia’s pseudopregnancy, a state common worldwide for pandas under human care
SINGAPORE, 23 September 2015 – Despite promising signs and after months of monitoring, River Safari’s female panda, Jia Jia, will not be delivering a cub this year. Based on scientific data gathered from her behaviours and hormone levels, the birthing window has now passed and panda caretakers concluded that the seven-year-old bear is not pregnant.
Jia Jia underwent artificial insemination on 18 April after an unsuccessful mating attempt with her male counterpart, Kai Kai. Since July, she was seen eating less bamboo, sleeping more and her hormone levels were increasing – all signs consistent with pregnancy or pseudopregnancy. Giant pandas commonly display pseudopregnancies and experts worldwide are often not able to determine pandas’ pregnancy status until a late stage.
Dr Cheng Wen-Haur, Chief Life Sciences Officer, Wildlife Reserves Singapore, said: “Our team of vets and keepers were cautiously optimistic in welcoming a baby panda and while we cannot expect one this year, we are pleased and encouraged by the development of Kai Kai and Jia Jia. The past months have provided an invaluable learning experience for us in understanding the complex reproduction and biology of one of the world’s most charismatic species, and we hope for better results next year.”
Panda caretakers will review information and data collected in the last few months before the next breeding season for the bears begin around April. To get the pandas accustomed to physical contact with each other, keepers aim to bring the pandas together before the start of the mating season.
In addition, caretakers will continue to vary daylight hours and temperature in the Giant Panda Forest – a technique which successfully triggered the breeding cycles of the pandas in April this year. Pandas’ mating instincts are brought on by hormonal changes in response to seasonal variations such as temperature changes and increasing day length from winter to spring. To simulate this seasonal transition, the pandas will return to their dens earlier between October to March, and later between April to September.
Giant pandas Kai Kai and Jia Jia celebrate birthdays and third anniversary in Singapore; Changes in Jia Jia’s hormones and behaviours keep caretakers on toes over possible pregnancy
SINGAPORE, 3 September 2015 – As she quietly celebrated her 7th birthday this morning, River Safari’s female panda Jia Jia continues to keep a little secret which has been keeping vets and keepers on their toes over changes in her behaviours.
In the past two months, panda caretakers have been playing a guessing game on whether the bear is pregnant or going through pseudopregnancy, a common state in which pandas exhibit hormonal and behavioural changes that indicate they are pregnant when they are not.
After the panda underwent artificial insemination on 18 April, caretakers, including a panda specialist from China, have been closely monitoring her behaviours and hormone levels, watching for signs of pregnancy. Since July, Jia Jia has been eating less bamboo, sleeping more, spending more time in her den and her hormone levels are increasing – all signs consistent with pregnancy or pseudopregnancy. Giant pandas commonly display pseudopregnancies and experts worldwide are often not able to determine pandas’ pregnancy status until a late stage.
Dr Cheng Wen-Haur, Chief Life Sciences Officer, Wildlife Reserves Singapore, said: “Under the watchful eyes of our vets and keepers, both Kai Kai and Jia Jia continue to develop well in their Singapore home. Both reached sexual maturity for the first time this year and we are now tracking Jia Jia closely. We hope the data and knowledge gathered from the study of Kai Kai and Jia Jia will add to the global understanding of this endangered species, and contribute to the conservation of giant pandas.”
Since 23 July, vets and keepers have been conducting weekly ultrasound scans in an attempt to detect a foetus but the results have been inconclusive. The gestation period for a giant panda is typically five months, and the foetus only starts to develop a few weeks before birth.
Dr Serena Oh, Assistant Director of Veterinary Services, Wildlife Reserves Singapore, said: “Her behaviours are in line with a rise in progesterone but it is not easy to confirm her pregnancy because the gestation period varies for each panda. Giant pandas have delayed implantation and it is difficult to see the small foetus during ultrasound scans. We can only definitively conclude she is not pregnant once her hormone levels return to normal and she has not delivered, but for now, it is still a guessing game.”
Classified as “endangered” with only 1,600 left in the wild, giant pandas are notoriously difficult to breed. River Safari’s pandas were brought together to mate in April, after vets and keepers had successfully triggered breeding behaviours through controlled lighting and temperature in Giant Panda Forest. As the mating session appeared unsuccessful, Jia Jia was artificially inseminated.
Vets and keepers will continue monitoring Jia Jia’s hormone levels and conduct ultrasound scans. The public can follow Jia Jia’s development via Wildlife Reserves Singapore’s Twitter account (@tweetWRS) with the hashtag #SGPanda.
Jia Jia’s mate, Kai Kai, was also presented with a cake today where he enjoyed the birthday treat in the company of 30 pre-school kids from PCF Zhenghua. The male panda will turn eight on 14 September.
The pandas’ birthdays will be marked with a Panda Party Week from 5 to 13 September, where both bears will receive daily treats as a form of enrichment. In addition, visitors can look forward to interactive booths to learn more about giant pandas, and get hands-on with arts and crafts. Visitors can also enjoy one-for-one promotions on exclusive panda merchandise, as well as panda-licious treats. To mark the pandas’ coming of age, children born in 2007 and 2008 enter River Safari for free in September. Free admission is extended to Singaporeans, permanent residents and long-term visit pass holders.