{"id":16762,"date":"2026-04-13T12:23:19","date_gmt":"2026-04-13T11:23:19","guid":{"rendered":"https:\/\/explorersagainstextinction.co.uk\/blog\/?p=16762"},"modified":"2026-04-16T13:35:54","modified_gmt":"2026-04-16T12:35:54","slug":"giant-otters-in-the-pantanal-progress-pressure-and-the-power-of-monitoring","status":"publish","type":"post","link":"https:\/\/explorersagainstextinction.co.uk\/blog\/giant-otters-in-the-pantanal-progress-pressure-and-the-power-of-monitoring\/","title":{"rendered":"Giant Otters in the Pantanal: Progress, Pressure and the Power of Monitoring"},"content":{"rendered":"\n

In 2024, Explorers Against Extinction supported a small but important part of the long-term monitoring work carried out by Projeto Ariranhas<\/a>, the Giant Otter Project, in Brazil\u2019s Pantanal.<\/p>\n\n\n\n

Their latest annual report provides a clear snapshot of both progress and ongoing challenges for this Endangered species.<\/p>\n\n\n\n

Monitoring in numbers<\/h2>\n\n\n\n
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Fieldwork in 2025 focused on three key regions of the Pantanal, alongside additional work in the Central Amazon. Across these areas, the team carried out 13 field expeditions<\/strong>, monitoring 164 individual giant otters across 31 groups<\/strong>, and surveying over 410 kilometres of river systems<\/strong>.<\/p>\n\n\n\n

During this period, 34 new cubs were recorded<\/strong>, providing valuable insight into breeding success and population structure.<\/p>\n\n\n\n

This kind of consistent, long-term dataset is critical. Giant otters are highly social and territorial, and understanding how groups form, move and reproduce over time is essential for effective conservation planning.<\/p>\n\n\n\n

Signs of progress<\/h2>\n\n\n\n

One of the most encouraging trends is in cub survival<\/strong>.<\/p>\n\n\n\n

Since 2019, the project has tracked a steady improvement, with average cub survival increasing from 0.27% to 0.54<\/strong>% over a six-year period.<\/p>\n\n\n\n

While still low, this doubling reflects the impact of sustained monitoring, protection of breeding areas, and improved management of human activity in key habitats.<\/p>\n\n\n\n

A fragile system<\/h2>\n\n\n\n

Despite this progress, the report makes clear that early life remains the most vulnerable stage.<\/p>\n\n\n\n

Giant otter pups face multiple pressures, including:<\/p>\n\n\n\n