After an absence of over 180 years, giant tortoises have made a comeback to Floreana Island in the Galápagos archipelago of Ecuador. In a remarkable conservation effort, 158 juvenile hybrids were reintroduced to the island by scientists and local park rangers. The initiative, part of a captive breeding program that began in 2017, aims to revive the population of these tortoises, which faced extinction in the 1840s due to whalers, a devastating fire, and human exploitation.
Describing the moment as akin to watching his children take their first steps, conservation biologist James Gibbs, the vice-president of science and conservation at the Galápagos Conservancy, expressed his excitement as the young tortoises enthusiastically explored their new surroundings upon release. These juveniles, expected to reach a weight of up to 600 pounds in the next two decades, constitute a portion of the planned 700 tortoises to be gradually reintroduced to Floreana. The hybrids carry a significant genetic resemblance to the extinct Floreana species, making their reintroduction crucial for the island’s ecosystem.
Washington Tapia, a biologist and director of Biodiversa-Consultores specializing in the Galápagos Islands, highlighted the importance of not only increasing the tortoise population but also reestablishing the lost genetic lineage. The hope is that these juvenile tortoises, aged between eight and 13 and weighing 30 to 50 pounds, will contribute to the restoration of Floreana Island’s depleted ecosystem over time, given their potential lifespan of over a century.
The release of the tortoises was a heartfelt endeavor, with Gibbs and park rangers carrying the hefty juveniles up the volcanic island’s slopes before setting them free in designated areas. Divided into two groups, the tortoises were released into different habitats on the island, with expectations that many will migrate to the highland farmlands for better resources. They now coexist with various wildlife and face challenges from non-native species introduced by humans, such as rats, cats, and invasive plants like blackberry and guava.
Equipped with GPS trackers, the tortoises will be closely monitored by researchers to track their movements in real-time. Gibbs emphasized the team’s commitment to ensuring the tortoises’ successful acclimatization to their new/old habitat, with continuous monitoring and interventions if needed.
Overall, the reintroduction of giant tortoises to Floreana Island marks a significant milestone in conservation efforts, aiming to revive a species and restore ecological balance in this unique ecosystem.