Overview

Distribution

Range Description

Distributed in Kazakhstan, China, Mongolia. In Kazakhstan from northern Aral sea basin to Balkhash Lake and Zaysan basin. In Mongolia found in Great Lakes Depression, Valley of the Lakes, Dzungarian Govi Desert, Trans-Altai Govi Desert, Alashani Govi Desert, Northern Govi, and Eastern Govi Sokolov et al. (1996). In the northern part the major factor that limits dispersal is deep freezing of soil during winter.
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Geographic Range

Salpingotus crassicauda is found in northwest China, Southwest Mongolia, and the Soviet Union.

Biogeographic Regions: palearctic (Native )

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Physical Description

Morphology

Physical Description

Head and body range in length from 41 to 47 mm. The tail is more than double the length of the body, ranging in length from 93 to 126 mm. The tail is swollen at the proximal end, due to fat storage, and it is covered with short hairs that become longer toward the terminal end. The metatarsals are extended and range from 20 to 25 mm. There are only three toes present in each hind foot of S. crassicauda. It has tufts of hair beneath each toe, which aid in gripping when running on soft sand. S. crassicauda has external ears that are small and round (MacDonald 1984, Nowak 1991, Ognev 1963).

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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
Inhabits desert and steppe habitats, preferentially in sand dunes overgrown with tamarisk, saxaul, and saltwort vegetation. Solitary, nocturnal, sometimes also active in dusk. When chased try to bury in the sand. Has simple temporary and complex permanent burrows. Permanent burrows can be up to 3 m long with several passages, part of which do not reach surface. Exits sealed with sand plugs. Feed on insects (mainly acridoids), arachnids and plant parts (mainly seeds). Spring reproduction starts in April - May, summer reproduction starts in May-June. Litter size is 2-5 young.

Systems
  • Terrestrial
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Habitat

Salpingotus crassicauda can be found in steppes and deserts. They dig burrows in sand dunes. Their burrows can extend up to three meters in length (Holden 1993, Nowak 1991).

Terrestrial Biomes: desert or dune

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Trophic Strategy

Food Habits

Salpingotus crassicauda feeds on insects and vegetable matter. However, in captivity one Salpingotus ate only invertebrates. S. crassicauda may also eat seeds, like many other jerboas (Nowak 1991, MacDonald 1984).

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Life History and Behavior

Reproduction

Reproduction

Salpingotus crassicauda females have eight teats and have an average litter of 2.7 young. Sexual maturity is not reached in the first year. The reproductive behavior is unknown. Other northern species of jerboas, however, breed shortly after emerging from hibernation. These jerboas are thought to have two litters per season consisting of two to six young (Nowak 1991, MacDonald 1984, Ognev 1963).

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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
DD
Data Deficient

Red List Criteria

Version
3.1

Year Assessed
2008

Assessor/s
Batsaikhan, N. & Tsytsulina, K.

Reviewer/s
Amori, G. (Small Nonvolant Mammal Red List Authority) & Temple, H. (Global Mammal Assessment Team)

Justification
Inadequate information on distribution, population size and trends, or the impact of threats. Data Deficient.

History
  • 1996
    Vulnerable
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Conservation Status

Salpingotus crassicauda is regarded as rare in both China and the Soviet Union (Nowak 1991).

IUCN Red List of Threatened Species: data deficient

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Population

Population
Spatial distribution is very erratic, and number significantly fluctuates. In different subpopulations number can differ 1,7 - 14,5 times. According to some authors up to 13 individuals per 10 km tracking is considered high density (Scherbakov and Kochenev, 1982). However, Gromov and Erbaeva (1995) wrote that in summer in Zaysan basin population density can be up to 60 individuals per 10 km of tracking.

Population Trend
Unknown
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Threats

Threats

Major Threats
Drying of water sources and droughts also threaten this species, although it remains unclear if these represent natural environmental changes or are driven by anthropogenic activity. Preyed upon by owls, red foxes, alpine weasels and marbled polecats. In Kazakhstan major threats include overgrazing. Also, burrow destruction and roadkills are significant.
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Management

Conservation Actions

Conservation Actions
Listed as Rare in the 1987 and 1997 Mongolian Red Books (Shagdarsuren et al., 1987; MNE, 1997).
In Red List of Kazakhstan (1996) listed under category III (rare, small in number and limited range species).
Occurs in protected areas along whole range (approximately 19% of the species’ range in Mongolia).
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Relevance to Humans and Ecosystems

Benefits

Economic Importance for Humans: Negative

Jerboas in general may be a pest to melon growers, however, there were no reports of this behavior specifically for this species (MacDonald 1984).

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Wikipedia

Thick-tailed Pygmy Jerboa

The Thick-tailed Pygmy Jerboa (Salpingotus crassicauda) is a species of rodent in the Dipodidae family. It is found in China, Kazakhstan, and Mongolia. Its natural habitats are temperate grassland and temperate desert. It is threatened by habitat loss.

This species grows to around 1 inch as an adult and is primarily a herbivore, they will eat many leafy greens, nuts, and small insects. They get most of their water intake from the food that they consume, however they will drink water if they can find it.

References

  1. ^ Batsaikhan, N. & Tsytsulina, K. (2008). Salpingotus crassicauda. In: IUCN 2008. IUCN Red List of Threatened Species. Downloaded on March 2009. Database entry includes a brief justification of why this species is of data deficient
  • Holden, M. E. and G. G. Musser. 2005. Family Dipodidae. Pp. 871-893 in Mammal Species of the World a Taxonomic and Geographic Reference. D. E. Wilson and D. M. Reeder eds. Johns Hopkins University Press, Baltimore.
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