How Old Is the Oldest Known Tortoise?

A Seychelles giant tortoise named Jonathan is the oldest known tortoise at 182 years old. Residing on the tropical island of Saint Helena in the South Atlantic Ocean, Jonathan was brought to the island in 1882. He was estimated to be about 50 years old at the time of his arrival, and is the only survivor of the four tortoises brought to Saint Helena. Giant tortoises are among the longest living animals on the planet, and thought to live over 200 years. Yet it is difficult to confirm this idea as the tortoises usually outlive the people studying them. Besides Jonathan, other giant tortoises have lived well into the history books: Harriet at 176, Esmeralda at 170, and Adwaita whose lifespan was measured to be 255 years.

More about tortoises:

  • While the term "turtle" refers to any shelled reptile, tortoises are those that only live on land.
  • The shell of a tortoise or turtle is fused bone and contains a rib cage, spinal cords, and nerve endings. The nerve endings allow the creatures to feel movement against them.
  • Eleven species of giant tortoises live on the Galápagos islands as of 2014. When Charles Darwin arrived at the islands 1835, there were 15 species. The tortoises are listed as endangered species and protected by the Ecuadorian government.

Frequently Asked Questions

What is the age of the oldest known tortoise?

The oldest known tortoise, named Adwaita, was an Aldabra giant tortoise that lived to be around 255 years old. Adwaita passed away in 2006 at the Alipore Zoological Gardens in Kolkata, India. His impressive lifespan is a testament to the longevity potential of tortoises.

How do scientists determine the age of a tortoise?

Scientists often estimate a tortoise's age by counting the growth rings on their shells, much like counting tree rings. However, this method becomes less accurate as tortoises age and their shells wear down. In some cases, historical records or carbon dating of the shell may provide more precise age estimates.

Are all tortoise species capable of living for centuries?

Not all tortoise species have the same lifespan potential. While some species, like the Aldabra giant tortoise, can live for over a century, others have shorter lifespans. Environmental factors, diet, and genetics play significant roles in determining the longevity of different tortoise species.

What factors contribute to the longevity of tortoises?

Tortoises are known for their slow metabolism, which contributes to their long lifespans. A diet rich in nutrients, a safe habitat free from predators, and minimal stress are other factors that can contribute to the longevity of tortoises. Their hard shells also provide protection from environmental hazards.

Can tortoises in captivity live as long as those in the wild?

Tortoises can indeed live long lives in captivity, sometimes even longer than in the wild, due to the absence of predators and regular access to food and veterinary care. However, the quality of care, including diet, habitat, and enrichment, is crucial for their health and longevity in a captive environment.

What can humans learn from the longevity of tortoises?

Humans can learn a great deal about aging and longevity from tortoises. Their slow-paced lifestyle, low-calorie diet, and resilience are areas of interest for researchers studying aging. Understanding the biological mechanisms behind tortoises' longevity could offer insights into extending human healthspan and lifespan.

More Info: BBC

Discussion Comments

anon1000427

Jonathan is not the oldest living turtle. It is George (Jorge).

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