Standard Presentation (12 minutes) Australian Marine Sciences Association 2025 Conference

Satellite Tagging Reveal Movements and Occupancy Patterns of Southern Right Whales in Southern Australian Waters and the Southern Ocean. (120127)

Claire Barr 1 , Luciana Moller 1 2 , Sarah Laverick 3 , Rob Slade 3 , Simon Childerhouse 3 , Dave Paton 3 , Amy Kennedy 4 , Alex Zerbini 4
  1. Cetacean Ecology, Behaviour and Evolution Laboratory, Flinders University, Adelaide, South Australia, Australia
  2. Molecular Ecology Laboratory, Flinders University, Adelaide, South Australia, Australia
  3. Blue Planet Marine, Canberra, Australian Capital Territory, Australia
  4. Cooperative Institute for Climate, Ocean and Ecosystem Studies, University of Washington, Marine Mammal Laboratory, Alaska Fisheries Science Center, NOAA Fisheries, and Marine Ecology and Telemetry Research, Seattle, WA, United States

Southern right whales (Eubalaena australis) are listed as endangered under the Australian Environment Protection and Biodiversity Conservation Act, with eastern and western populations recovering at different rates. While several coastal calving areas have been identified in southern Australia, little is known about movements outside these areas, or their overlap with anthropogenic activities. To address this, we satellite-tagged four whales in Encounter Bay, South Australia (SA), in June 2024 — an area seasonally used by individuals from the slower-recovering eastern population. The tags provided data for up to 200 days and tracks of up to 11,000 km. The whales exhibited transiting and area-restricted search behaviours, moving in westerly or south-then-westerly directions and occupying latitudes between 31° -47°S and longitudes between 96° - 138°E. Two whales with calves spent extended periods in coastal reproductive areas in SA and Western Australia, as well as previously unrecognised sites along the SA coast. Over 20,000 dive profiles were recorded, with average depths ranging from 8.4-20 m, and maximum of about 300 m in the subtropical convergence zone. Tracking confirms overlap with significant marine industry activity, highlighting risks to this recovering species and providing information to support conservation under the southern right whale National Recovery Plan.