Related Experiment Video
Updated: Feb 23, 2026

Development of a Colloidal Gold-based Immunochromatographic Test Strip for Detection of Cetacean Myoglobin
Published on: July 13, 2016
"Spot" call: A common sound from an unidentified great whale in Australian temperate waters
Rhianne Ward1, Alexander N Gavrilov1, Robert D McCauley1
1Centre for Marine Science and Technology, Curtin University, Kent Street, Bentley, Western Australia, 6102, Australia rhiward@hotmail.com, a.gavrilov@curtin.edu.au, r.mccauley@cmst.curtin.edu.au.
Abstract:
Underwater passive acoustic recordings in the Southern and Indian Oceans off Australia from 2002 to 2016 have regularly captured a tonal signal of about 10 s duration at 22-28 Hz with a symmetrical bell-shaped envelope. The sound is often accompanied by short, higher frequency downsweeps and repeated at irregular intervals varying from 120 to 200 s. It is termed the "spot" call according to its appearance in spectrograms of long-time averaging. Although similar to the first part of an Antarctic blue whale Z-call, evidence suggests the call is produced by another great whale, with the source as yet not identified.
More Related Videos
12:32Image Rendering Techniques in Postmortem Computed Tomography: Evaluation of Biological Health and Profile in Stranded Cetaceans
Published on: September 27, 2020
06:22The Floating Lab: Standard Operational Procedure for Collecting and Filtering Seawater Samples from Operating Ferries for Environmental DNA Analysis
Published on: August 1, 2025
Related Concept Videos
Heart Sounds
Auscultation is the process of listening to these internal body sounds using a stethoscope. The heart produces four types of sounds, but only two—S1 and S2—can usually be heard with a stethoscope.
S1, also known as the "lub" sound, is caused by the closure of atrioventricular (A-V)...
Sound as Pressure Waves
The pressure fluctuation depends on the difference in displacements between the successive points in the...
Sound Waves
Sound waves are longitudinal in most fluids because fluids cannot sustain any lateral pressure. In solids, however, shear forces help in propagating the disturbance in the lateral direction as well....
Sound Waves: Resonance
Tidal Forces
Perception of Sound Waves
The pitch of a sound depends on the frequency and the pressure amplitude of the source. Two sounds of the same...