Australian Sea Lions - Adventure Bay Charters

Australian Sea Lions – Adventure Bay Charters

Australian Sea Lions Fact Sheet

Australian Sea Lions are an endangered species that live only in the waters of South Australia and southern Western Australia. South Australia is lucky enough to have 85% of the whole Australian Sea Lion population!

  • Threatened Status: Endangered (IUCN Red List)
  • Generation Length: 12.4 – 12.8 years
  • Number of Mature Individuals: 6,500
  • Group Population Trend: Decreasing

Australian Sea Lions Diet

The Australian Sea Lion’s diet is poorly known but probably includes a variety of fish and invertebrates such as octopus and squid. There is some suggestion that they occasionally may catch penguins! (Australian Museum)

Australian Sea Lions Breeding Behaviour

Australian Sea Lions form loose associations within the breeding colonies. Males do not form harems but will guard and then mate with individual females in turn. (Australia Museum)  Breeding colonies are located only on remote areas of the coastline or islands and only 66 breeding colonies are known. Breeding cycles happen only once every 18 months and females will only breed at the site where they were born at. (Australian Marine Conservation Society)

Australian Sea Lions - Adventure Bay Charters

Australian Sea Lions – Adventure Bay Charters

Why we run a Sea Lion count program

Australian Sea Lions are a unique species, as they live in genetically isolated populations, have low reproductive rates, high site fidelity and poor dispersal. Gillnets from commercial shark fishing are one of the biggest threats to Australian Sea Lions – one of the main reasons why their population is decreasing every year. The data we collect may help more researchers to have a better understanding of the sea lion populations and behaviours in this area, and to come up with relevant conversation suggestions for the future.

Dominant Male Australian Sea Lions - Adventure Bay Charters

Dominant Male Australian Sea Lions – Adventure Bay Charters

What data we will collect

  • Count # of total individuals on the beach
  • Count # of dominant males on the beach
  • Count # of social groups, group size, and # of dominant males in each social group
  • Observe and report unusual behaviour
  • Observe and report injured sea lions

How you can be involved

Join our sea lion count program to contribute towards our data collection project and the future of Australian Sea Lion conservation! We will provide binoculars and data sheets onboard for our observers to carry out their surveys.

How you can help the Australian Sea Lions

Pick up any rubbish you find in or near waterways and oceans. Marine debris (like old fishing nets, rope, plastic, and other non-biodegradables are causing havoc on our marine ecosystems and animals that live within them!).

Support the protection and management of key coastal and marine sites and volunteer in sea lion surveys through National Parks.

Support programs to reduce the discharge of pollutants into the aquatic environment.

Minimise waste of packaging and materials—refuse, reduce, re-use, recycle.

East sustainable seafood rather than unethically sourced options.