Sound propagates much faster and over larger distances in water than in air, mainly
because of differences in the density of these media. This raises the question of whether …

In its most basic conception, a novelty is simply something new. However, when many
previously proposed evolutionary novelties have been illuminated by genetic …

This special issue of the Anatomical Record explores many of the anatomical adaptations
exhibited by aquatic mammals that enable life in the water. Anatomical observations on a …

Baleen whales (mysticetes) use vocalizations to mediate their complex social and
reproductive behaviours in vast, opaque marine environments. Adapting to an obligate …

Background It is widely held that in toothed whales, high frequency tonal sounds
called'whistles' evolved in association with'sociality'because in delphinids they are used in a …

Background For marine animals, acoustic communication is critical for many life functions,
yet individual calling behavior is poorly understood for most large whale species. These …

In practical applications of passive sonar principles for extracting characteristic frequencies
of acoustic signals, scientists typically employ traditional time-frequency domain …

Background Unlike most mammals, toothed whale (Odontoceti) skulls lack symmetry in the
nasal and facial (nasofacial) region. This asymmetry is hypothesised to relate to …

Reports of humpback whale (Megaptera novaeangliae) song chorusing occurring outside
the breeding grounds are becoming more common, but song structure and underwater …

In the past decades, in the context of a changing ocean submitted to an increasing human
activity, a progressive decrease in the frequencies (pitch) of blue whale vocalizations has …