development and agriculture have had devastating impacts on the habitats on river dolphins. the total population of araguaian river dolphins is estimated to be between 600 and 1,500 individuals, and genetic diversity is limited. the ecology of their habitat has been adversely affected by agricultural, ranching and industrial activities, as well as by the use of dams for hydroelectric power. the inhabited section of the araguaia river probably extends over about out of a total length of . the tocantins river habitat is fragmented by six hydroelectric dams, so the population there is at particular risk. its probable eventual iucn status is vulnerable or worse.