Amazon River Dolphin Conservation and Welfare

Amazon river dolphins — botos — face escalating threats from deliberate killing for bait and dam construction that are driving population declines across the Amazon and Orinoco river systems.

Key Facts

Amazon river dolphins are the largest river dolphin species, reaching 2.5 meters and distinctive pink coloration
They inhabit the Amazon and Orinoco river systems across nine South American countries
The boto was uplisted to Endangered on the IUCN Red List in 2018 as populations declined significantly
Deliberate killing has dramatically increased as fishers use boto carcasses as bait for catfish species sold in markets
Dam construction fragments river systems and prevents dolphin movement between habitats
Mercury from illegal gold mining bioaccumulates in dolphin tissue at levels causing neurological effects
Boto are important to Amazonian indigenous cultures — they feature in mythology as shapeshifters
Population surveys estimate the Amazon population declined by approximately 65% between 1994 and 2016

Welfare Considerations

Boto welfare is threatened by deliberate violence that has no analog in most large mammal conservation contexts. Fishers catching catfish using boto carcasses as bait kill dolphins intentionally — the killing method and conditions of death cause significant acute suffering. Unlike bycatch or habitat loss, this is direct targeted killing driven by economic incentive. The rapid population decline documented between 1994 and 2016 demonstrates the welfare and conservation impact of this practice. Mercury from artisanal gold mining causes chronic neurological harm in surviving dolphins. Dam construction prevents the seasonal river flood movements that botos depend on to access floodplain feeding areas, causing nutritional stress. Protecting boto welfare requires both law enforcement against killing and mercury reduction in gold mining practices — a politically complex challenge given the economic significance of both catfish fishing and artisanal mining.

What You Can Do

Support Boto Conservation Network and WWF programs monitoring and protecting boto populations
Advocate for stronger enforcement of boto killing prohibitions in Brazil, Peru, and Colombia
Support mercury reduction programs for artisanal gold mining in the Amazon basin
Donate to river dolphin conservation organizations working across all South American range countries
Raise awareness about boto conservation among people unfamiliar with this unique and declining species