During my stay several activities have contributed to achieve a number of goals. I went two times to
the field to do direct-count surveys of river dolphins. The objective of these projects is to estimate the
distribution and abundance of the Inia boliviensis in the rivers Mamoré, Madeira, Abuna, Negro, Apere,
Ibare and Tijamuchi. Physical and chemical characteristics of the rivers are taken to understand how the
environment influences the distribution and abundance.