A Curtin University-led research team has uncovered valuable information on the migration patterns of the fin whale, as well as where they breed and feed, which will help aid in the monitoring and protection of the species.
Published in Frontiers in Marine Science, the research team monitored 285,000 hours of underwater sound recordings from 15 locations off Antarctica and Australia between 2002 and 2019 and identified two migratory pathways used by the species – from the Indian sector of Antarctica to the west coast of Australia and from the Pacific sector of Antarctica to the east coast of Australia.
Lead researcher PhD student Meghan Aulich, from the Centre for Marine Science and Technology (CMST) at Curtin University, said the fin whale, known as the ‘greyhound of the sea’, was globally vulnerable due to a history of whaling, and ongoing risks of climate change and habitat disturbance.
“Our study identifies the long-term, seasonal vocal presence of the fin whale in Antarctic waters from late summer to early winter (February to June) and in Australian waters from autumn to mid-spring (May to October),” Ms Aulich said.
“We were able to determine that the whales spent more time in specific regions due to their ecological needs and not because they were ‘residents’ of that area. For example, we found that the fin whale had a late seasonal presence in colder, Antarctic waters in the winter and may be breeding at the Pacific Antarctic Ridge during this time.
“Further research is needed to fully understand their behaviour and migratory patterns, but by tracking this species and listening to their underwater conversations we were able to learn about where they breed and feed, which will help us monitor and protect this vulnerable species to ensure it thrives in its natural habitat.”
Professor Christine Erbe, also from Curtin’s CMST, said using the passive acoustic monitoring method allowed the research team to follow the fin whales without being intrusive.
“The Southern Hemisphere fin whale is a vulnerable sub-species and this method of tracking, whereby microphones are deployed in the deep sea, allows us to observe and map their movements with little disruption,” Professor Erbe said.
“Acousticians from the Australian Antarctic Division (AAD) were instrumental in helping us conduct this research, recording almost a million calls at frequencies of 20Hz, which is too low for humans to hear.
“This collaboration and expertise allow researchers to listen in to where the whales are going and why better informing us so we can help protect their populations in the future.”
The international team involved researchers from Curtin University, AAD, Ensta Bretagne (France), and NIWA (New Zealand).
The full paper is titled ‘Seasonal distribution of the fin whale (Balaenoptera physalus) in Antarctic and Australian waters based on passive acoustics,’ and can be found online here.
About Curtin University
Curtin University is Western Australia’s largest university, with close to 60,000 students. In addition to the University’s main campus in Perth, Curtin also has a major regional campus in Kalgoorlie, and a campus in Midland, as well as four global campuses in Malaysia, Singapore, Dubai and Mauritius. Curtin staff and students come from Australia and over 120 other countries around the world, with half our international students studying at Curtin’s offshore campuses.
Curtin is ranked in the top one per cent of universities worldwide, with the University placed 9th in Australia according to the Academic Ranking of World Universities (ARWU) 2021 and has achieved a QS Five Stars Plus rating, the highest available for a tertiary institution, and one of only five to do so in Australia.
The University has built a reputation around innovation and an entrepreneurial spirit, being at the forefront of many high-profile research projects in astronomy, biosciences, economics, mining and information technology. It is also recognised globally for its strong connections with industry, and for its commitment to preparing students for the jobs of the future.
For further information, visit curtin.edu.au.
This piece was prepared online by Panuruji Kenta, Publisher, SEVENSEAS Media