Over the last thirty years, Claire Garrigue has been invested in programs on the ecology and conservation of marine mammals. Most of them focuses on the IUCN subpopulation of Humpback Whales of Oceania classified by IUCN as an endangered, with the aim of assessing its status, estimating existing connectivity in the South Pacific, and identifying its migratory routes nutrition areas. She also worked on other species such as dugongs, small delphinids and sperm whales. The issues addressed relate to population dynamics, connectivity, reproductive behavior, habitat use, migration, and human impact. In order to answer these questions, various tools are used including demographic methods, molecular analysis, acoustic and telemetry. These complementary methods make it possible to obtain the knowledge necessary for the implementation of effective management for the conservation of populations.