Overview
Distribution
Range Description
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Geographic Range
The short-eared elephant shrew mostly inhabits Namibia, southern Botswana, and South Africa.
(Shaw, 1983)
Biogeographic Regions: ethiopian (Native )
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Physical Description
Morphology
Physical Description
Compared to members of the other elephant shrew genus, the short-eared elephant shrew has shorter and rounder ears and lacks the pale rings around the eyes that are typical of those animals. The tail is hairy, with a visible gland on the underside. On the hind feet, the first digit is small and has a claw. The fur is usually long, soft, and is an orange, brown or grayish color on top and a lighter color on the underside. Adults often weigh between 40-50 grams with 100-110mm long bodies and 97-130mm long tails. Defining skull features include an enlarged auditory bullae and the appearance of three upper incisors, as well as a short rostrum and crowded teeth. Females also have six mammae.
(Rathbun & Fons) (Unger, online)
Range mass: 40 to 50 g.
Range length: 100 to 110 mm.
Average basal metabolic rate: 0.292 W.
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Ecology
Habitat
Habitat and Ecology
Systems
- Terrestrial
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Habitat
The animal only lives in desert and semi-desert areas of the countries in which it is found. It hides in the sparse grass cover or bushes that are a part of these dry areas. They also burrow into the sand.
(Smith, 1829)
Terrestrial Biomes: desert or dune ; scrub forest
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Trophic Strategy
Food Habits
Short-eared elephant shrews typically eat insects, usually termites and ants, and other small invertebrates. They may also feed on plant parts such as roots, shoots, and berries.
(Unger & Kratochvil, 1999)
Animal Foods: insects; terrestrial non-insect arthropods
Plant Foods: leaves; roots and tubers; fruit
Primary Diet: carnivore (Insectivore , Eats non-insect arthropods)
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Associations
Ecosystem Roles
These elephant shrews help move soil around to create their burrows as well as recycle vacant burrows left from rodent species.
(Unger, online)
Ecosystem Impact: soil aeration
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Predation
The animal usually jumps from bush to bush during the day or basks in the sun, but if harassed by diurnal predators, such as hawks, it switches its schedule and looks for food at dusk, hiding in bushes during the day. Also, by using their forelimbs these animals can dig tunnels very rapidly to quickly escape predators. Few predators prey on the young because the young mature and leave the nest shortly after birth.
(Lincoln Park Zoo, online) (Smith, 1829)
Known Predators:
- hawks (Accipitridae)
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Known predators
Accipitridae
This list may not be complete but is based on published studies.
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Known prey organisms
non-insect arthropods
Arthropoda
Insecta
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
In the wild, these animals only live for 1-2 years. In captivity they can live as long as 3-4 years.
(Unger, online)
Range lifespan
Status: wild: 1 to 2 years.
Range lifespan
Status: captivity: 3 to 4 years.
Average lifespan
Status: captivity: 8.7 years.
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Lifespan, longevity, and ageing
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Reproduction
Reproduction
The breeding season is in the warm, wet months of August and September. A female may have many pregnancies during one breeding season. (Shaw, 1934)
Mating System: monogamous
Gestation for these animals is typically about 56 days and only two young are born, sometimes one. They are born in a very precocial state; they can run within a few hours after birth, are large in size, and are born with hair and their eyes open. Babies are weaned at 16-25 days and reach sexual maturity after about 43 days. (Rathbun & Fons)
Breeding season: August and September
Range number of offspring: 1 to 2.
Average number of offspring: 2.
Average gestation period: 56 days.
Range weaning age: 16 to 25 days.
Average age at sexual or reproductive maturity (female): 43 days.
Average age at sexual or reproductive maturity (male): 43 days.
Key Reproductive Features: gonochoric/gonochoristic/dioecious (sexes separate); sexual ; fertilization (Internal ); viviparous
Average birth mass: 7 g.
Average gestation period: 65 days.
Average number of offspring: 1.6.
Average age at sexual or reproductive maturity (female)
Sex: female: 44 days.
The female does not make a nest for the young; however, she will find a sheltered area and give birth to the young in it. The mother does not guard her young and is gone from the litter most of the time, coming back once a day to feed the young. (Smith, 1829)
Parental Investment: precocial ; female parental care
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Molecular Biology and Genetics
Molecular Biology
Barcode data: Macroscelides proboscideus
There are 2 barcode sequences available from BOLD and GenBank. Below is a sequence of the barcode region Cytochrome oxidase subunit 1 (COI or COX1) from a member of the species. See the BOLD taxonomy browser for more complete information about this specimen and other sequences.
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Download FASTA File
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Statistics of barcoding coverage: Macroscelides proboscideus
Public Records: 2
Species: 2
Species With Barcodes: 1
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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
- 2006Least Concern(IUCN 2006)
- 2003Least Concern(IUCN 2003)
- 1996Vulnerable
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Conservation Status
Due to destruction of its habitat, this species is labeled “vulnerable” by the IUCN.
(Shaw, 1983)
US Federal List: no special status
CITES: no special status
IUCN Red List of Threatened Species: least concern
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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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Relevance to Humans and Ecosystems
Benefits
Economic Importance for Humans: Positive
Possible helpful soil movement from burrowing activity.
(Unger, online)
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Wikipedia
Short-eared Elephant Shrew
The Short-eared Elephant Shrew (Macroscelides proboscideus), or Round-eared Sengi or Round-eared Elephant Shrew, is a species of elephant shrew in the Macroscelididae family. It is found in Botswana, Namibia, and South Africa. Its natural habitats are subtropical or tropical dry shrubland, subtropical or tropical dry lowland grassland, and hot deserts.[2] They eat insects, shoots, and roots. Their gestation period is 56 days. The Short-eared Elephant Shrew is the only species in its genus (monotypic), but is still grouped with the soft-furred (non-giant) elephant shrews[3].
Elephant-shrews are among only a handful of monogamous mammals, making them a model group for the study of monogamy. The Short-eared Elephant Shrews have been studied for their mate guarding behavior[4].
References
| Wikimedia Commons has media related to: Macroscelides proboscideus |
- ^ Schlitter, Duane A. (16 November 2005). Wilson, Don E., and Reeder, DeeAnn M., eds. ed. Mammal Species of the World (3rd ed.). Baltimore: Johns Hopkins University Press, 2 vols. (2142 pp.). pp. 83. ISBN 978-0-8018-8221-0. OCLC 62265494. http://www.bucknell.edu/msw3.
- ^ a b Stuart, C., Perrin, M., FitzGibbon, C., Griffin, M. & Smit, H. (2008). Macroscelides proboscideus. In: IUCN 2008. IUCN Red List of Threatened Species. Downloaded on 29 December 2008.
- ^ California Academy of Sciences. Elephant-shrews or Sengis: Macroscelidea. http://research.calacademy.org/research/bmammals/eshrews/index.html
- ^ Bernard, R. T. F., G. I. H. Kerley, T. Doubell and A. Davison 1996. Reproduction in the round-eared elephant shrew (Macroscelides proboscideus) in the southern Karoo, South Africa. Journal of Zoology, London, 240 233-243.
Further reading
| This article about a mammal is a stub. You can help Wikipedia by expanding it. |
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