LONDON — Employees members at London Zoo have been “heartbroken” after a high-risk matchmaking operation involving two uncommon Sumatran tigers went horribly fallacious on Friday. The male’s lethal mauling of the feminine tiger quickly after they met drew an outpouring of reactions on social media.

However one query was paramount: May the tragedy have been averted?

The animals had been paired as potential mates as a part of a European-wide conservation effort for the critically endangered subspecies. Asim — age 7, assured, good-looking, playful — had been shipped in from Demark to satisfy Melati, a fellow Sumatran who had lived for years on the famend zoo in Regent’s Park in Central London.

He courted her for 10 days in a separate enclosure, the zoo mentioned — “chuffing” at her and getting used to her sight and scent. Then he lastly approached her.

Melati, who had raised 5 cubs with one other tiger, by no means survived the encounter. She died at 10 years previous.

Shocked and grieving social media customers questioned London Zoo’s strategies:

Was it too quickly for the 2 wildcats to satisfy?

Why didn’t keepers use tranquilizers when the encounter turned violent?

And why not use different strategies, comparable to reproductive biotechnologies, to attempt to enhance the inhabitants of a subspecies whose numbers have shrunk within the wild?

“This demise is on you,” Gal Hazor, a popular culture author, mentioned in a tweet on Saturday. “You introduced a tiger to an unnatural atmosphere, and launched him to a different tiger lower than two weeks later.”

Helen Goss, a social media supervisor, additionally wrote on Twitter: “Why on Earth would you introduce two tigers after solely 10 days!?”

“I wouldn’t introduce my cat to a brand new cat in such a short while,” she added, calling the strategy “unbelievable” and “merciless.”

The zoo mentioned in an announcement on Friday that it had taken each precaution earlier than the pairing, and that consultants had judged the time proper for the introduction.

Employees members additionally tried to save lots of Melati when issues turned aggressive, the zoo mentioned, nevertheless it was too late.

“Zoo workers instantly carried out their ready response, utilizing loud noises, flares and alarms to try to distract the pair, however Asim had already overpowered Melati,” the assertion mentioned.

Some got here to the zoo’s protection.

Vivian Walker, a wildlife photographer and conservation employee, argued that “each assembly between large cats is a threat regardless of how calculated,” and that tranquilizers “wouldn’t have taken impact fast sufficient to save lots of her.”

The truth is, in an up to date assertion, the zoo mentioned, “A tranquilizer wouldn’t have been efficient, not solely due to the problem of focusing on the right tiger in that state of affairs, however as a result of size of time wanted for it to take impact.”

Others questioned if a safer methodology to assist Melati produce extra cubs might have been used.

“Wouldn’t synthetic insemination have been the safer solution to go?” Barbara Gould Stringer wrote on Fb.

Rebecca Blanchard, a spokeswoman for the Zoological Society of London, which manages London Zoo, mentioned in an electronic mail on Sunday that the vets on the zoo had pioneered synthetic insemination for its animals a decade in the past, when conventional mating had not been profitable for a pair of tigers.

However the methodology “was not required on this occasion,” she mentioned, “as there was an acceptable female and male who could possibly be paired.”

Synthetic insemination, the method of amassing sperm from a male animal and manually depositing it right into a feminine’s reproductive tract, has been used efficiently earlier than to facilitate the copy of endangered tiger species.

In the USA, there have been three recognized tiger pregnancies from synthetic insemination up to now 20 years, in line with the Minnesota Zoo, which coordinates a Tiger Species Survival Plan. However the success charge has been low to date.

“The restricted contribution of fertility preservation methods to species conservation principally stems from the lack of awareness of species biology, in addition to insufficient services, house, experience and funding wanted for his or her profitable software,” Pierre Comizzoli, a analysis biologist on the Smithsonian Conservation Biology Institute, wrote in a paper printed in January 2015.

Mr. Comizzoli argued that, earlier than creating assisted reproductive methods, data of reproductive traits is first wanted. “Sadly, we all know little or no about species biology (copy in solely 250 species has been correctly described),” he wrote.

The truth is, Melati mated with one other Sumatran tiger, Jae Jae, in 2013, 2014 and 2016 to supply her cubs. However Jae Jae was just lately moved to Le Parc des Félins, a zoo southeast of Paris, with the intention to begin a brand new household.

“The European breeding program takes plenty of elements into consideration — together with parentage and historical past, to generate essentially the most genetically various inhabitants potential,” Ms. Blanchard wrote.

Sumatran tigers are the smallest surviving tiger subspecies. Recognized scientifically as Panthera tigris sumatrae, they weigh 165 to 380 kilos, are distinguished by their orange coats and black stripes and might be discovered within the wild solely on Sumatra, an Indonesian island.

There are fewer than 400 of the uncommon tigers left, in line with World Wildlife Fund, a world nongovernmental group. The animals’ low numbers render their copy crucial for his or her survival.

It’s nonetheless not clear why Asim attacked, and lots of are mourning the lack of a treasured animal.

The zoo mentioned that Asim had sustained a “minor harm” from the assault Friday and was being handled by vets.

It is usually unclear if London Zoo will use him to mate once more.


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