In the wetlands of the Pantanal and beyond, Projeto Ariranhas is working to safeguard the vulnerable giant otter, a species vital to maintaining the health of aquatic ecosystems. The Pantanal population, the southernmost in Brazil, is particularly at risk due to its low genetic diversity, making it more susceptible to environmental changes, habitat loss, and disease.
This work is being supported by fundraising from Sketch for Survival 2024.
Creating Pathways for Survival
Projeto Ariranhas is focused on identifying migration corridors and recolonization areas to connect fragmented habitats. This is achieved through field surveys and a community-driven monitoring programme, ensuring local engagement and sustainable solutions. The aim is to mitigate the impacts of habitat fragmentation and climate change, creating opportunities for giant otter populations to expand and adapt.
2024 Monitoring Update
This year, monitoring efforts are in full swing across key regions, including the Pantanal (Porto Jofre and Rio Negro) and Tocantins (Parque Estadual do Cantão). Surveys have covered approximately 233 km of rivers, cataloging 74 giant otters, including 19 confirmed pups, spread across 11 groups and a few solitary individuals.
Monitoring is essential for understanding the challenges facing this endangered species. Habitat loss, human conflict, and climate change remain significant threats. In 2024, wildfires severely affected parts of the Rio Negro, providing an urgent reminder of these challenges. Monitoring has helped measure the impact of these fires and devise strategies to mitigate future incidents.
Through direct observation, the collection of biological samples, and behavioral data, researchers are gaining crucial insights into giant otter populations. This knowledge is essential for creating effective conservation strategies to ensure the species’ long-term survival.
Why It Matters
The giant otter is an apex predator, playing a vital role in maintaining balance within aquatic ecosystems. Protecting these animals means protecting the biodiversity and resilience of their habitats. Migration corridors are key to reconnecting populations and enabling adaptation in the face of ongoing environmental pressures.
Image: Projeto Ariranhas
