Southbound migration corridor of pygmy blue whales off the northwest coast of Australia based on data from ocean bottom seismographs
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A line array of 14 ocean bottom seismographs was deployed on the Exmouth Plateau northwest of the North West Cape in Western Australia in December 2014-January 2015. Acoustic data collected with this array were used to evaluate the corridor of the southbound migration of pygmy blue whales of the eastern Indian Ocean population. It is found that pygmy blue whales tended to travel southward much further away from the Western Australian coast, at distances of up to 400 km from shore, than that expected from data on their northbound migration. This is an important observation providing additional information on the migration pattern of pygmy blue whales, which is crucial for assessing their population and migration by passive acoustic means.
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Migratory patterns and estimated population size of pygmy blue whales (Balaenoptera musculus brevicauda) traversing the Western Australian coast based on passive acoustics.McCauley, Robert ; Jenner, Curt (2010)Passive acoustic data sets along the Western Australian coast have revealed annual southnorth migrations of pygmy blue whales. At the latitude of Exmouth (21o 30’ S) a sharp southerly travelling pulse of pygmy blue whales ...
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