Galapagos giant tortoise reintroduction
Kartavya Desk Staff
Source: BBC
Subject: Species in News
Context: The Galapagos National Park released 158 hybrid giant tortoises onto Floreana Island to help restore its delicate ecosystem.
• These juvenile tortoises carry significant DNA from the Chelonoidis niger, a species that had been considered extinct for 150 years.
About Galapagos giant tortoise reintroduction:
About The Galapagos Islands:
What it is?
• The Galapagos is an extraordinary volcanic archipelago consisting of 19 main islands and over 100 islets.
Location: Situated in the Pacific Ocean, approximately 1,000 km (620 miles) west of the Ecuadorian coast.
Geological Origins: Formed by volcanic activity at the confluence of three tectonic plates (Nazca, Cocos, and Pacific).
Key Features:
• Evolutionary Hub: Known as a living museum of evolution, it famously inspired Charles Darwin’s theory of natural selection.
• Endemic Species: Home to species found nowhere else, including marine iguanas, blue-footed boobies, and the iconic giant tortoises.
• UNESCO Heritage: Designated as a Natural World Heritage Site in 1978 for its unique biodiversity.
About Hybrid Giant Tortoises:
What it is?
• These are tortoises with mixed ancestry. While the original Floreana species (Chelonoidis niger) was hunted to extinction by the mid-19th century, scientists discovered hybrid descendants on Wolf Volcano (Isabela Island).
IUCN Status:
• Extinct in the Wild (Parent Species): The pure Chelonoidis niger is technically extinct.
• Conservation Status: The genus Chelonoidis as a whole is generally classified as Endangered or Critically Endangered by the IUCN.
• Conservation Goal: Through a selective breeding program, these hybrids (carrying 40%–80% original DNA) are being used to resuscitate the ecological role of the extinct species.
Key Characteristics:
• Ecological Engineers: They shape the landscape by dispersing seeds, clearing vegetation, and creating wallows that serve as micro-habitats for other animals.
• Saddlebacked Carapace: Unlike the dome-shaped shells of some other islands, Floreana-descended tortoises often have saddlebacked shells, an adaptation that allows them to lift their necks higher to reach tall cacti.
• Longevity & Resilience: Released between ages 8 and 13, these tortoises are large enough to survive potential threats from introduced rats and cats. They can live for over 100 years.