Goats Invaded Seychelles Islands, Triggering Early Conservation Efforts

Introduced goats became a major conservation concern on Seychelles islands, leading to one of the region's earliest mammal eradication efforts on Aride Island around 1920. This historical event, documented in a study on introduced mammals in the Western Indian Ocean, marked a crucial step in recognizing the threat these animals posed to island vegetation. The problem was widespread, with researchers identifying 74 eradication attempts across 45 islands, predominantly in the Seychelles, Mauritius, and Îles Éparses.

Goats, being large herbivores, severely impacted island ecosystems that had evolved without such grazing pressure. Early attempts, like the one on Aride, involved shooting the animals, demonstrating that introduced species could become targets for conservation when they threatened an island's natural state. Later efforts became more organized and extensive, with three-quarters of all documented eradication attempts occurring after 2000.

The focus gradually shifted from controlling populations to complete removal, aiming to restore island ecosystems. The study encompassed nine introduced mammal species, but goats stood out due to their significant vegetation consumption. Eradication projects varied in scale, from small islets to thousands of hectares, illustrating a broader conservation strategy evolving over time.

Further goat eradication efforts were recorded on Aldabra's islands, with one ambitious program aiming for complete removal across the atoll. Researchers emphasize the distinction between deliberate eradication and natural die-offs following control measures. The history of goats in the Seychelles serves as a clear example of how introduced species can create lasting conservation issues, requiring deliberate action to protect native biodiversity.