Standard Presentation Australian Marine Sciences Association Annual Meeting 2023

Animal-borne video highlights individual foraging specialisation and key benthic habitats for Australian sea lions (Neophoca cinerea) (#283)

Nathan Angelakis 1 2 , Simon Goldsworthy 2 , Sean Connell 1 , Roger Kirkwood 2 , Dirk Holman 3
  1. School of Biological Sciences, Ecology and Evolutionary Biology, The University of Adelaide, Adelaide, SA, Australia
  2. Marine Ecosystems, South Australian Research and Development Institute (SARDI) (Aquatic Sciences), Adelaide, SA, Australia
  3. Marine Parks, Department for Environment and Water, Port Lincoln, SA, Australia

Identifying key resources and habitats utilised by endangered species is crucial to quantifying the ecological value different areas have for at-risk populations. For marine species, gaining meaningful data on foraging behaviours and habitat selection is particularly difficult. For the endangered Australian sea lion, animal-borne cameras offer an opportunity to identify key prey and foraging behaviours as well as important benthic habitats exploited by the species. Used concurrently with GPS, time-depth recorder and accelerometer/magnetometer technologies, this provides insight into how habitat and foraging specialisation vary between individuals, age/sex classes, colonies and across the species’ distribution. Here, we present data from 10 Australian sea lions, illustrating how different foraging strategies are used across habitat, providing information on the value of different benthic habitats for Australian sea lions. This information is fundamental to informing crucial management and conservation of populations. Animal-borne video from Australian sea lions also provides a novel and engaging opportunity of connecting both Indigenous and non-Indigenous people to Sea and Land Country. Using animal-borne video, Australian sea lions allow us to explore the benthic habitats they utilise across current Sea Country, as well as Sea Country that was formerly coastline and Land Country lived on and utilised by Indigenous Australians.