Perameles bougainville

Geographic Range

Western barred bandicoots ( Perameles bourgainville ) are endemic to Australia. Originally, this species inhabited the mainland from Onslow and Wheatbelt in the west and New South Wales and Victoria in the east. Currently, they only reside naturally on the islands of Bernier and Dorre in Shark Bay, located off of the western coast of Australia. These islands were separated from the mainland about 8,000 years ago and they were separated from each other between 3,000 to 6,000 years ago. Populations have been removed from Dorre and Bernier Islands to be reintroduced to Heirisson Prong, Faure Island and the Arid Recovery Reserve at Roxby Downs. Captive breeding programs have also been attempted to establish populations in Dryandra Woodland, Peron Captive Breeding Centre and Kanyana Wildlife Rehabilitation Centre.

• Biogeographic Regions
• australian australian
  • introduced introduced
  • native native

Habitat

Originally, western barred bandicoots were found in arid and semi-arid areas with open bluebush, saltbush, scrublands and stony hills. Currently, they live in scrublands, sandhills and grasslands of stable dunes, just off of the beach. If predators are absent, they are fairly adaptable to their introduced habitats.

• Habitat Regions
• temperate temperate
• terrestrial terrestrial

• Terrestrial Biomes
• desert or dune desert or dune
• savanna or grassland savanna or grassland
• scrub forest scrub forest

Physical Description

This small marsupial has light brown to grey fur, which fades to white on their feet and bellies. They have two to three stripes on their hindquarters, known as 'bars', which alternate between brown-grey and brown-black fur. Western barred bandicoots have a long, pointed snout and large, erect ears. Their hind feet are elongated and their second and third toes are partially fused, their forth toe is long and equipped with a strong claw. Their marsupium faces backwards, so dirt is not kicked inside while females dig. Their tail is about 1/3 of their total length. Western barred bandicoots are the smallest members of the bandicoot family. At birth, they are about one centimeter long and weigh about 0.25 g. When they are fully grown, their head and body length is about 17.1 to 23.6 cm and they weigh between 172 and 286 g. These animals show slight sexual dimorphism; the females weigh more and have longer snouts than the males. There is no physical difference between the different island populations. A distinguishing factor between this animal and their close relatives are the bars on their hind quarters and their relative size. Eastern barred bandicoots are longer, between 27 to 35 cm and southern brown bandicoots are dark brown and have shorter ears, muzzles and hind feet.

• Other Physical Features
• endothermic endothermic
• bilateral symmetry bilateral symmetry

• Sexual Dimorphism
• female larger

Reproduction

Western barred bandicoots can breed throughout the year. A few nights before estrus, males and females become sexually attracted, particularly at dusk. Immediately after mating, all attraction ceases. Males follow females, attempting to grasp their tails. When they catch a tail, the male holds it to the ground and the female raise her hindquarters. Intromission only lasts about 30 seconds at a time; males continuously penetrate for a period of about 26 to 120 minutes. Their large testes give evidence for a promiscuous mating system. While mating, the female's tail is often severally damaged or may fall off.

• Mating System
• polygynandrous (promiscuous) polygynandrous (promiscuous)

Western barred bandicoots breed about every 2 months. Their breeding season lasts all year, but they prefer the cooler months between April and October. These animals have the highest breeding rate for animals of their size and only have a 12 day gestation period. An average litter consists of 1.8 young; the ratio of males to females is 1.2 to 1, respectively. Females typically have 1 to 3 young per litter and around 4 litters a year. The pouch young are weaned when they are about 61 to 63 days old, just before the next litter is born. The young become independent shortly after being weaned. Females become sexually mature at around 120 days while males take slightly longer at 150 days.

• Key Reproductive Features
• iteroparous iteroparous
• seasonal breeding seasonal breeding
• year-round breeding year-round breeding
• gonochoric/gonochoristic/dioecious (sexes separate)
• sexual sexual
• viviparous viviparous

Females take care of their young while they are in the pouch and for a very short time after they leave. Inside the pouch, 8 teats are arranged in two semicircles. Newborns use a teat that was not been used by the previous litter. The young continue to grow in the pouch until they are about 50 to 54 days old and begin to emerge. At this point, the mother leaves the young in the nest while she forages. Around day 61 to 63, the young are weaned and are soon kicked out of the nest to make space for the next litter.

• Parental Investment
• female parental care female parental care
• pre-hatching/birth
  • provisioning
    • female
  • protecting
    • female
• pre-weaning/fledging
  • provisioning
    • female
  • protecting
    • female
• pre-independence
  • provisioning
    • female
  • protecting
    • female

Lifespan/Longevity

Western barred bandicoots live a maximum of 5.8 years in captivity. In Heirisson Prong, females have a maximum lifespan of more than 5 years, where males have a maximum lifespan of 4.5 years; the average lifespan at this facility is less than 18 months. In Peron, the maximum lifespan is 5 years, females live an average of 3 years and males live an average of 3.5 years. The lifespan of wild populations has not been determined.

Behavior

Western barred bandicoots are nocturnal, solitary animals that make nests within their home range. Their nests are built in shallow hollows or leaf litter under low shrubs. During the day, they stay in their nests until dusk when they emerge to forage. Within a 24 hour period, males may travel up to 1,020 m while females limit their traveling to about 490 m.

• Key Behaviors
• terricolous
• nocturnal nocturnal
• motile motile
• sedentary sedentary
• solitary solitary
• territorial territorial

Home Range

The home range of a male is about 2.5 to 14.2 hectares, while a female’s home range is only 1.4 to 6.2 hectares. These ranges may overlap but it is generally only on the outer boundary limits. As the population increases, home ranges generally decrease.

Communication and Perception

These animals are nocturnal, so they depend on touch, smell and hearing while hunting and traveling at night. They are very solitary and rarely live together. Both sexes have special scent glands behind their ears for marking their territory, males have scent glands for attracting and laying claim to a female for mating. Not much is known about how these animals communicate, but males make puffing sounds and show their aggression by opening their mouths and chasing other males.

• Communication Channels
• tactile tactile
• acoustic acoustic
• chemical chemical

• Other Communication Modes
• scent marks scent marks

• Perception Channels
• visual visual
• tactile tactile
• chemical chemical

Food Habits

Western barred bandicoots are terrestrial omnivores; they eat arthropods, plants, roots, herbs, seeds, berries, fungi and occasionally small vertebrates. As nocturnal animals, they go out at night to forage and dig for their food.

• Primary Diet
• omnivore omnivore

• Animal Foods
• insects
• terrestrial non-insect arthropods

• Plant Foods
• leaves
• roots and tubers
• seeds, grains, and nuts
• fruit

• Other Foods
• fungus

Predation

Foxes and feral cats were introduced to Australia and can severely damage native populations, including the population size of western barred bandicoots. These bandicoots are able to run fast, jump straight into the air and change direction quickly to escape these predators.

Ecosystem Roles

Cats and foxes are major predators that could eliminate populations. Fire, disease, rats and mice may also cause issues by depleting their habitats or food sources. By trying to protect this species and remove introduced predators, the other native flora and fauna may benefit. Foxes and feral cats prey on more than just bandicoots, removing them would help protect other small mammal populations. Western barred bandicoots also have many ecto- and endoparasites such as mites, ticks, fleas, nematodes and protists.

Economic Importance for Humans: Positive

There are no known positive effects of western barred bandicoots on humans.

Economic Importance for Humans: Negative

There are no known adverse effects of western barred bandicoots on humans.

Conservation Status

Western barred bandicoots are listed as 'endangered' by the IUCN and the US Federal List, CITES places them under Appendix I. Their native islands, Bernier and Dorre, are protected areas. A recovery plan was developed between 2005 and 2010 and involves the protection of wild populations and their habitat by maintaining captive populations, enhancing community participation and education and introducing populations to the mainland. The Arid Recovery area is looking for new locations where climate fluctuations are manageable. Captive populations may become infected with the poorly known papillomatosis carcinomatosis virus, the course of this infection is determined by the host’s immune system. Likewise, a new species of Chlamydiales bacteria was isolated in 2000 from a handful of western barred bandicoots on Bernier Island, preventing the relocation of these animals to avoid infecting others. In 2005, topical oxytetracycline and neomycin eye drops were given for 4 months and oxytetracycline was given intramuscularly for 6 weeks to treat this.

Additional Links

Encyclopedia of Life

Contributors

Laura Rochefort (author), Northern Michigan University, John Bruggink (editor), Northern Michigan University, Leila Siciliano Martina (editor), Texas State University.

References

Bennett, M., Murdoch University. 2008. "Western barred bandicoot in health and disease: thesis" (On-line). Accessed January 31, 2013 at http://researchrepository.murdoch.edu.au/474/2/02Whole.pdf .

Friend, T., J. Richards. 2008. "IUCN Red List of Threatened Species" (On-line). Perameles bougainville . Accessed January 29, 2013 at http://www.iucnredlist.org/details/full/16569/0 .

Friend, T. 2012. "Genetics and ecology of the western bandicoot" (On-line). Department of Environment and Conservation. Accessed January 29, 2013 at http://www.dec.wa.gov.au/our-environment/science-and-research/animal-conservation-research/5765-genetics-and-ecology-of-the-western-barred-bandicoot.html .

Richards, J., J. Short. 2003. Reintroduction and establishment of the western barred bandicoot Perameles bougainville ( Marsupialia : Peramelidae ) at Shark Bay, Western Australia. Biological Conservation , 109: 181-195. Accessed January 29, 2013 at http://www.sciencedirect.com/science/article/pii/S0006320702001404 .

Short, J., J. Richards, B. Turner. 1998. Ecology of the western barred bandicoot ( Perameles bougainville ) ( Marsupialia : Peramelidae ) on Dorre and Bernier Islands, Western Australia. wildlife Research , 25: 567-586. Accessed February 04, 2012 at http://www.publish.csiro.au/paper/WR97131.htm .

Tacutu, C., A. Budovsky, D. Wuttke, G. Lehmann, D. Taranukha, J. Costa, V. Fraifeld, J. Magalhaes. 2012. "Human Ageing Genomic Resources: Integrated databases and tools for the biology and genetics of ageing" (On-line). AnAge entry for Perameles bougainville . Accessed January 28, 2013 at http://genomics.senescence.info/species/entry.php?species=Perameles_bougainville .

Warren, K., R. Swan, T. Bodetti, T. Friend, S. Hill, P. Timms. 2005. Ocular Chlamydiales infections of Western Barred Bandicoot ( Perameles bougainville ) in Western Australia. Journal of Zoo and Wildlife Medicine , 36: 100-102. Accessed January 30, 2013 at http://www.jstor.org/stable/20096420 .

Young, S. 2002. Zoological Restraint and Anesthesia . Ithaca, New York: International Veterinary Information Service. Accessed January 29, 2013 at http://www.ivis.org/special_books/Heard/young/ivis.pdf .

2010. " Perameles bougainville " (On-line). Encyclopedia of Life. Accessed January 29, 2013 at http://eol.org/pages/323867/details .

2004. "ARKive" (On-line). Western barred bandicoot ( Perameles bougainville ). Accessed January 30, 2013 at http://www.arkive.org/western-barred-bandicoot/perameles-bougainville/ .

Department of Primary Industries, Parks, Water and Environment. 2008. "Bandicoots" (On-line). Tasmania Parks and Wildlife Service. Accessed January 28, 2013 at http://www.parks.tas.gov.au/index.aspx?base=4826 .

U.S. Fish & Wildlife Service. 2013. "Environment Conservation Online System" (On-line). Barred bandicoot ( Perameles bougainville ). Accessed January 30, 2013 at http://ecos.fws.gov/speciesProfile/profile/speciesProfile.action?spcode=A02Y .

The Government of Western Australia. 2012. "Western Barred Bandicoot Perameles bougainville (Quoy and Gaimard, 1834)" (On-line). Department of Environment and Conservation. Accessed February 03, 2013 at www.dec.wa.gov.au .

Species and Communities Unit. Western Barred Bandicoot Perameles bougainville , Burrowing Bettong Bettongia lesueur and Banded Hare-Wallaby Lagostrophus fasciatus National Recovery Plan. 49. Western Australia: Department of Environment and Conservation (Western Australia). 2012. Accessed April 26, 2013 at http://www.environment.gov.au/biodiversity/threatened/publications/recovery/pubs/shark-bay-marsupials.pdf .

Government of Western Australia: Department of Environment and Conservation. 2009. "Western barred bandicoot ( Parameles bougainville bougainville )" (On-line). Shark Bay World Heritage Area, Western Australia. Accessed January 29, 2013 at http://www.sharkbay.org/assets/documents/fact%20sheets/western%20barred%20bandicoot%20v2.pdf .