CNRS International project 2025-2030 Small odontocetes, such as small dolphins or porpoises, are discreet species, very often threatened and sensitive to human occupation. Passive acoustics is a good way to monitor these populations, but this monitoring comes up against various technical and theoretical problems. The acoustic productions of some of these species are high-frequency, narrow-bandwidth clicks (NBHF), which need to be recorded at very high sampling rates, by dedicated devices. Theoretical and computer tools are lacking to discriminate between species that sometimes coexist in the same area and whose behavior and spatial occupation are not well known. We record the acoustic productions of dolphins and coastal porpoises present on the Argentine coast, in the province of Buenos Aires and in other important zones of the American south cone, such as Patagonia (Chilean and Argentine) and the Chilean coast. We develop mathematical models for describing these signals and then, thanks to these models, we will refine their detection and classification, using tools related to artificial intelligence (convolutional neural network for example). The classification of clicks according to species would allow longer-term monitoring through dedicated detectors of the sound productions of these species whose conservation status needs to be clarified. cf. Summary sheet

LIS, IIMyC, UACh, Chili & Argentina, coPI Glotin, Malige