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The Australian sea lion is a fascinating species endemic to Australia, with a population of around 11,000 to 15,000 individuals. They are found along the southern and western coastlines of the Great Southern Reef, with the majority (about 85%) living in South Australia and the remaining 15% in Western Australia. These unique creatures are agile in water and on land, using their front flippers for propulsion and their back flippers for steering and walking on land.
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What You'll Learn
- Australian sea lions are found in Western Australia and South Australia
- They breed on at least 50 islands off the coast of these states
- The population is estimated to be around 11,200 to 14,730 individuals
- They are endangered and protected by Australian State and Federal government legislation
- They are found on sandy beaches, in isolated bays and sheltered areas
Australian sea lions are found in Western Australia and South Australia
The Australian sea lion (Neophoca cinerea) is a species of sea lion that is endemic to Australia. It is Australia's only endemic pinniped and is the least numerous seal species in the country. Its breeding range extends from the Houtman Abrolhos Islands in Western Australia to The Pages Islands, which lie east of Kangaroo Island in South Australia.
In Western Australia, the Australian sea lion population has experienced a decline in recent years. This is attributed to various factors, including interactions with commercial fishing gear, illegal shooting, and marine fish aquaculture. Conservation efforts are focused on addressing these issues and protecting the species. The Australian Sea Lion is also protected by Australian State and Federal government legislation and is listed as rare by the IUCN.
In South Australia, the Australian sea lion population is mainly concentrated in three large colonies: The Pages Islands, Dangerous Reef, and Seal Bay at Kangaroo Island. These colonies have been relatively stable over the last decade, with a total population of around 4,474 individuals and 985 pups per season. However, there have been concerns about the high mortality rate among pups in these colonies, which may be due to infanticide or food shortages.
Overall, the Australian sea lion population is facing various challenges, including human disturbances, a unique breeding cycle, and a declining population trend. Conservation efforts are ongoing to protect this rare and endemic species in Western Australia and South Australia.
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They breed on at least 50 islands off the coast of these states
The Australian sea lion, also known as the Australian sea-lion or sealion, is a species of sea lion that is the only endemic pinniped in Australia. They breed on at least 50 islands off the coast of Western Australia and South Australia. The population is estimated to be 11,200 individuals spread among 67 breeding colonies. Thirty per cent of the population is found in Western Australia and 70% in South Australia.
The breeding range of the Australian sea lion extends from the Houtman Abrolhos Islands in Western Australia to The Pages Islands that lie east of Kangaroo Island in South Australia. The three largest colonies are found at The Pages Islands, Dangerous Reef, and Seal Bay at Kangaroo Island. These three large colonies all occur in eastern South Australia and account for an estimated 40% of the population.
The smaller colonies do not have complete population estimates, but the average pup count per season is 29 pups, ranging from 120 pups to 1 pup for the smaller colonies. The pup mortality rate during the 1999 breeding season at the Dangerous Reef colony in South Australia, for example, was 41%, a record for the colony, and there are concerns that the colony’s population is stagnating as a result.
Australian sea lions breed on rocks and sandy beaches, usually in isolated bays and sheltered areas. One such site on Kangaroo Island off South Australia has become a popular tourist attraction. They are agile in both water and on land and use their front flippers to propel themselves and their back flippers to walk on land and as a rudder in the water.
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The population is estimated to be around 11,200 to 14,730 individuals
The Australian sea lion (Neophoca cinerea) is a species of sea lion that is the only endemic pinniped in Australia. It is Australia's only endemic and least numerous seal species. The population is estimated to be 11,200 to 14,730 individuals, spread among 67 breeding colonies. About 85% of the population lives in South Australia, and the remaining 15% in Western Australia. An estimated 40% of the population is found in the three largest colonies located at the eastern end of its range. These large colonies are found at The Pages Islands with approximately 2100 individuals and 474 pups per season, Dangerous Reef with approximately 1650 individuals and 351 pups per season, and Seal Bay at Kangaroo Island with 700 individuals and 160 pups per season.
Australian sea lions are agile in water and on land. They use their front flippers to propel themselves and their back flippers to walk on land and steer in the water. They can hold their breath for up to 12 minutes and are referred to as benthic foragers, feeding from the sea floor on species like cuttlefish, octopus, small rays, sharks, and rock lobsters. They are also known to feed on fish, cephalopods, crustaceans, and possibly penguins.
The breeding range of Australian sea lions extends from the Houtman Abrolhos Islands in Western Australia to The Pages Islands that lie east of Kangaroo Island in South Australia. They breed on at least 50 islands off the coast of Western Australia and South Australia, preferring sandy beaches, usually in isolated bays and sheltered areas. They have a unique breeding cycle among the pinniped species, with females giving birth to their pups after a 17.3-17.7-month cycle. Their breeding season is about five months long, and they give birth a day or two after arrival and mate about a week later.
Australian sea lion numbers are relatively small compared to other seals in the area, and they suffered heavily during the 19th century sealing period, with many colonies being wiped out. They are highly susceptible to disturbance by humans, especially during the breeding season. Major threats in the 20th and 21st centuries include interactions with commercial fishing gear and illegal shooting. They are listed as rare by the IUCN and as "in need of special protection" under the Wildlife Conservation Act of Western Australia (1950).
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They are endangered and protected by Australian State and Federal government legislation
Australian sea lions are listed as vulnerable under the Commonwealth Environment Protection and Biodiversity Conservation Act 1999 and are similarly listed in each state across their range (South Australia and Western Australia). They are also protected by Australian State and Federal government legislation and listed as rare by the IUCN.
The Australian sea lion population is naturally disadvantaged when compared to other pinnipeds in Australia. Its long and complicated breeding cycle, the high site fidelity of females, and high mortality rates all make the species more vulnerable to extinction. The population is listed as endangered on the IUCN Red List of Threatened Species.
The Wildlife Conservation Act of Western Australia (1950) has listed them as "in need of special protection". Their conservation status is listed as endangered, with a population estimated at 14,730 animals. In 2010, the population was listed at an estimated 6,500 mature adult sea lions, and it continues to decrease.
The biggest threat to Australian sea lion colonies is gillnets, which are invisible, thin mesh nets suspended in the water. Gillnets are used by commercial fisheries to capture sharks, but Australian sea lions also get snagged in the mesh and drown. The only solution to accidental gillnet deaths and other fishery-related deaths of sea lions is to close the areas where sea lions forage for food out at sea and prevent fishing with gillnets in those areas.
The Australian government has taken steps to protect sea lion colonies, closing the areas of sea directly around breeding colonies to gillnet fishing. Every fishing boat that fishes near sea lion colonies must now have cameras on board to monitor what is being caught, and further areas are closed to all gillnet fishing when a sea lion is killed. This strategy has been shown to have an immediate impact, with an estimated 98% reduction in sea lion bycatch mortality in the gillnet fishery and a stabilization of the decline in sea lion pup abundances at some impacted breeding sites.
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They are found on sandy beaches, in isolated bays and sheltered areas
Australian sea lions are found on sandy beaches, in isolated bays and sheltered areas. They are endemic to Australia, with their breeding range extending from the Houtman Abrolhos Islands in Western Australia to The Pages Islands, east of Kangaroo Island in South Australia. About 85% of the population is found in South Australia, while the remaining 15% is in Western Australia. They are known to breed on at least 50 islands off the coast of these two states.
One popular site for tourists is a beach on Kangaroo Island, South Australia. Other notable breeding sites include Dangerous Reef and Seal Bay, both of which are also located in South Australia. The three largest colonies are found at The Pages Islands, Dangerous Reef, and Seal Bay at Kangaroo Island, with approximately 2100, 1650, and 700 individuals, respectively.
Australian sea lions are agile on land and in water, using their front flippers for propulsion and their back flippers for steering and walking on land. They are known to wander several kilometres inland, although the reasons for this are unclear. They are also capable of holding their breath for up to 12 minutes and can dive to depths of more than 100 metres.
Historically, the population of Australian sea lions experienced a significant decline due to over-hunting for their leather and oil in the 19th century. Today, they continue to face threats such as entanglement in fishing nets and illegal shootings. Conservation efforts are in place to protect this rare and endangered species.
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Frequently asked questions
Australian sea lions are found along the southern and western coastlines of the Great Southern Reef, with about 85% living in South Australia and the other 15% in Western Australia.
Australian sea lions breed on at least 50 islands off the coast of Western Australia and South Australia. Their breeding range extends from the Houtman Abrolhos Islands in Western Australia to The Pages Islands that lie east of Kangaroo Island in South Australia.
The population of Australian sea lions is estimated to be between 11,200 and 14,730 individuals, spread among 67 breeding colonies.
Australian sea lions are listed as "in need of special protection" under the Wildlife Conservation Act of Western Australia (1950) and as rare by the IUCN. They are considered endangered.
