Antarctic blue and fin whales were once abundant in the southeastern Atlantic Ocean, yet
their occurrence and ecology in this region is still poorly understood. Seasonal acoustic …

Killer whales are apex predators with temporally and spatially varying distributions
throughout the world's oceans. Their ecology and behaviour are poorly understood in most …

Little is known of the movements and seasonal occurrence of humpback whales (Megaptera
novaeangliae) of South Africa and the Antarctic, populations once brought to near extinction …

Underwater vocalization is widely documented in phocids. In aquatic mating species,
vocalization is typically associated with breeding, including intraspecific agonistic behavior …

Two of the Antarctic pack ice seals, Ross, Ommatophoca rossii, and leopard, Hydrurga
leptonyx, seals, are extremely difficult to study via traditional visual survey techniques, yet …

Southern right whales (SRWs), Eubalaena australis, have a cosmopolitan distribution in the
Southern Hemisphere but are known to overwinter in four coastal breeding grounds off …

Knowledge of cetacean occurrence and behaviour in southern African waters is limited, and
passive acoustic monitoring has the potential to address this gap efficiently. Seasonal …

Underwater vocalisations of grey seals (Halichoerus grypus) were recorded by static
acoustic monitoring (SM2M, Wildlife Acoustics) in the vicinity of a colony located at White …

Animals use different strategies to adjust their vocalisations to compensate for ambient noise
interference. This is true for some marine mammals, especially cetaceans, but relatively little …

Some marine mammals can adjust acoustic parameters of their sound signals in response to
changes in sunlight and ambient noise. Evidence was found in several toothed whales; …