A gal for George, the world’s loneliest tortoise?
July 27, 2010 Leave a comment
Long-lived, lonely: The tragic fate of Lonesome George
George has seen a lot in his life. He was born sometime between 80 and 200 years ago, so what exactly he’s seen remains speculative. What we do know is that in 1971, some goat herders spotted George on the island of Pinta in the Galapagos, and George’s life changed significantly. Researchers rushed to the site to find the tortoise. The reason for the rush? They thought George was the very last of his subspecies, the lone denizen of Pinta, a survivor of the combined adverse effects of whalers and goats in the Galapagos.
George’s people+goats problem
Probably within George’s memory—if he could form such memories—whalers arrived at the Galapagos islands and decimated tortoise populations by eating the animals, whose abundant meat proved irresistible to the protein-starved mariners. With the people came the goats, and the goats proceeded to eat their way through everything on Pinta that the tortoises like to eat, too, destroying all of the tortoise’s nesting sites in the process. By the 1970s, biologists were pretty sure that there were no longer any Geochelone nigra abingdonii, George’s subspecies, living on the island. Then George popped up his wrinkled head just as the goatherders were walking by.
George elicits some bizarre human behavior, ignores tortoise females
The people took George to a tortoise sanctuary, where they attempted to introduce him to the joys of female companionship. Because George was alone, species-wise, they selected a couple of females from a closely related subspecies, Geochelone nigra becki, who hailed from Wolf Island, part of the Galapagos island chain. There, George lived with the females for 30 years with nary a leering glance at them, much less successful mating. One frustrated researcher went so far as to join George in his pen, where she covered herself in eau d’ female tortoise, excretions from the female that presumably carried male-attracting pheromones. During her time with George, the male tortoise appeared to have a sort of sexual awakening, showing a bit of interest and exhibiting signs of sexual activity. The researcher even confirmed that George was indeed male and that everything appeared to be functioning normally.
Then, her research period at the sanctuary ended, and George lost his trainer in the romantic arts. Bachelor and celibate, his claim to fame remained that he was the world’s loneliest animal. He even made it into the Guinness Book of World Records as the rarest creature on Earth. His sobriquet became Lonesome George, and thousands of people came to view him at his island sanctuary. Over time, he has had his trials: a caretaker who let him eat too much, periodic overindulgence in cactus—a tortoise delicacy—that led to constipation, and a fall that almost killed him. But still, no mating.
Will George find his Ms. Right?
Then, a group of researchers tackled the job of drawing blood from tortoises on the nearby island of Isabela, where a different subspecies of tortoise lives. They performed microsatellite DNA analysis on the blood, a type of analysis that produces a DNA fingerprint that can be used to characterize a species. To their surprise, they found a tortoise among their samples who appeared to be half-George. The male tortoise had a microsatellite DNA pattern that was a 50% match for George, meaning that somewhere on the island of Isabela, a possibly-female G. n. abindonii lurked and, apparently, mated.
Now the search is on for the individual who may blow George’s place in the record books but also be the last hope for their mutual species to persist on the planet. If the tortoise is female, researchers hope to introduce her to George, possibly awakening his long-dormant libido. Meanwhile, George’s former island home of Pinta could be a tortoise Eden for the pair: the goats are gone and much of the vegetation has returned to its original ecological state. If they can find George a mate, he may very well cease to be Lonesome George and become his species’ Adam, partner to the as-yet-unidentified Eve.