Overview
Distribution
Range Description
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Geographic Range
Planigale tenuirostris occupies inland SE Australia. (Painter et al, 1995)
Biogeographic Regions: australian (Native )
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Australia
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Physical Description
Morphology
Physical Description
P. tenuirostris is a rodent-like marsupial. It is small when compared to other Planigale spp. It has a flat skull that can be used for shoveling (Painter et al, 1995). The fur is brownish, but breeding males have fur discoloration (Read, 1987).
Range mass: 4 to 9 g.
Other Physical Features: endothermic ; bilateral symmetry
Average basal metabolic rate: 0.063 W.
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Ecology
Habitat
Habitat and Ecology
Systems
- Terrestrial
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Habitat
P. tenuirostris lives in low shrubland and tussock grassland with cracking clay soils. It lives in the deepest realms of the soil cavities and occasionally emerges at the surface . (Moss, 1988) Preferred habit is away from water in more open, less densely vegetated areas. (Read, 1987)
Habitat Regions: temperate
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Trophic Strategy
Food Habits
P. tenuirostris is a generalist insectivore; their diet reflects the available prey. Arthropods eaten include Coleoptera (beetles) and Araneidae (orbweavers), taxa not bigger than 800 cu mm. They may also eat small lizards. (Read, 1987)
Animal Foods: reptiles; insects; terrestrial non-insect arthropods
Primary Diet: carnivore (Insectivore , Eats non-insect arthropods)
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Associations
Ecosystem Roles
P. tenuirostris lives in sympatry with P. gilesi and the two appear to partitioning food resources. This is partly due to body size differences (P. gilesi is larger than P. tenuirostris). Also, partitioning occurs due to the fact that P. tenuirostris lives in the deepest parts of the cavities, while P. gilesi lives at intermediate crack depths. (Read, 1987)
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Predation
Becaue P. tenuirostris spends so much time below the ground (where no larger species coud fit), it is well protected from predators. (Moss, 1988)
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Known prey organisms
non-insect arthropods
Arthropoda
Insecta
Reptilia
This list may not be complete but is based on published studies.
- Myers, P., R. Espinosa, C. S. Parr, T. Jones, G. S. Hammond, and T. A. Dewey. 2006. The Animal Diversity Web (online). Accessed February 16, 2011 at http://animaldiversity.org. http://www.animaldiversity.org
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Life History and Behavior
Life Expectancy
Lifespan/Longevity
It has been estimated that less than 15% of individuals in wild populations survive to an age of 2 years (Read, 1995).
Range lifespan
Status: captivity: 3 (high) years.
Average lifespan
Status: captivity: 5.2 years.
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Lifespan, longevity, and ageing
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Reproduction
Reproduction
The female P. tenuirostris has 12 teats and a pouch. Estrus in females lasts 1 day and the estrus cycle is 33 days. In males, spermatogenesis occurs in July and aspermatogenesis occurs the following March. The breeding season coincides with increases in food availability during the spring and summer. (Read, 1984)
Breeding season: July to mid-January
Average number of offspring: 6.
Average gestation period: 19 days.
Average weaning age: 95 days.
Key Reproductive Features: seasonal breeding ; gonochoric/gonochoristic/dioecious (sexes separate); sexual ; fertilization (Internal ); viviparous
Average gestation period: 19 days.
Average number of offspring: 6.
Average age at sexual or reproductive maturity (female)
Sex: female: 240 days.
Young P. tenuirostris detach from the teats at 36 days. The eyes open at 51 days. and weaning occurs at 95 days after birth. (Read, 1985)
Parental Investment: altricial ; female parental care
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Conservation
Conservation Status
IUCN Red List Assessment
Red List Category
Red List Criteria
Version
Year Assessed
Assessor/s
Reviewer/s
Justification
History
- 1996Lower Risk/least concern
- 1996Lower Risk/least concern
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Conservation Status
P. tenuirostris is fairly uncommon. (Read, 1987)
US Federal List: no special status
CITES: no special status
IUCN Red List of Threatened Species: least concern
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Status: Endangered
Date Listed: 12/02/1970
Lead Region: Foreign (Region 10)
Where Listed:
Population detail:
Population location: entire
Listing status: E
For most current information and documents related to the conservation status and management of Planigale tenuirostris , see its USFWS Species Profile
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Trends
Population
Population Trend
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Threats
Threats
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Management
Conservation Actions
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Wikipedia
Narrow-nosed Planigale
The narrow-nosed planigale (Planigale tenuirostris) is a species of very small marsupial carnivore of the family Dasyuridae.
Contents |
Taxonomy
The narrow-nosed planigale was described by Ellis Le Geyt Troughton in 1928, separating it from the common planigale (P. maculata) with which it had previously been associated. The scientific name for the species means "slender-snouted flat-weasel".[3]
Description
The narrow-nosed planigale differs from other planigales in its more rufous colouring and smaller size – only the long-tailed planigale is smaller. It is an active hunter of various invertebrates,[4] including beetles, grasshoppers, crickets, spiders and moths and is known as a fearless and pugnacious predator.[3] Its flattened head is used as a wedge to prize apart grass stems and turn over leaves in the leaf litter. It will often attack prey larger than itself. It is a nocturnal species and in winter is primarily crepuscular.[3]
Distribution and habitat
The narrow-nosed planigale is found in New South Wales, Queensland, South Australia and Northern Territory in a wide range of inland habitats.[4] It prefers areas with cracked clay soil.
References
- ^ Groves, C. (2005). Wilson, D. E., & Reeder, D. M, eds. ed. Mammal Species of the World (3rd ed.). Baltimore: Johns Hopkins University Press. pp. 37. OCLC 62265494. ISBN 0-801-88221-4. http://www.bucknell.edu/msw3.
- ^ Ellis, M., van Weenen, J. & Burnett, S. (2008). Planigale tenuirostris. In: IUCN 2008. IUCN Red List of Threatened Species. Downloaded on 28 December 2008. Database entry includes justification for why this species is of least concern
- ^ a b c Read, D. G. (1995). "Narrow-nosed Planigale". In Strahan, Ronald. The Mammals of Australia. Reed Books. pp. 113–115. ISBN 0-7301-0484-2
- ^ a b Menkhorst, Peter (2001). A Field Guide to the Mammals of Australia. Oxford University Press. p. 64. ISBN 0-19-550870-X.
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