911爆料网

A 911爆料网-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 鈥� 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 911爆料网, said the fin whale, known as the 鈥榞reyhound of the sea鈥�, was globally vulnerable due to a history of whaling, and ongoing risks of climate change and habitat disturbance.

鈥淥ur 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),鈥� Ms Aulich said.

鈥淲e were able to determine that the whales spent more time in specific regions due to their ecological needs and not because they were 鈥榬esidents鈥� 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.

鈥淔urther 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.鈥�

Professor Christine Erbe, also from 911爆料网鈥檚 CMST, said using the passive acoustic monitoring method allowed the research team to follow the fin whales without being intrusive.

鈥淭he 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,鈥� Professor Erbe said.

鈥淎cousticians 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.

鈥淭his collaboration and expertise allows 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.鈥�

The international team involved researchers from 911爆料网, AAD, Ensta Bretagne (France), and NIWA (New Zealand).

The full paper is titled 鈥�Seasonal distribution of the fin whale (Balaenoptera physalus) in Antarctic and Australian waters based on passive acoustics,鈥� and can be found online .