| African grass rat | |
|---|---|
 | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Mammalia |
| Order: | Rodentia |
| Family: | Muridae |
| Genus: | Arvicanthis |
| Species: | A. niloticus |
| Binomial name | |
| Arvicanthis niloticus (É. Geoffrey, 1803) | |
The African grass rat (Arvicanthis niloticus) is a species of rodent in the family Murinae. [2]
The species is divided into the following six subspecies.
Arvicanthis niloticus is a rodent of medium size, with the length of the head and of the body between 159 and 202 mm, the length of the tail between 125 and 173 mm, the length of the foot between 33 and 42 mm, the length of the ears between 19 and 23 mm and a weight up to 201 g. [4]
The fur is rough. The upper parts of individual hairs are yellowish with blackish tips. Long yellow or orange hairs are present on the bottom. A dorsal dark stripe more or less distinct extends from the head to the base of the tail. The ventral parts are whitish, with the base of the hairs blackish.
Areas where there are the whiskers, the eyes and a small patch behind each ear are orange. The legs are pink. The tail is shorter than the head and body, densely covered with hair, blackish above and white-yellowish below. The karyotype is 2n = 62, FN = 62-64.
It is mainly distributed in the Sahel and the sudano-zambesian Savanna belt, namely Benin, Burkina Faso, Burundi, Central African Republic, Chad, Democratic Republic of the Congo, Ivory Coast, Eritrea, Ethiopia, [5] Gambia, Ghana, Kenya, Malawi, Mauritania, Niger, Nigeria, Senegal, Sierra Leone, Somalia, Sudan, Tanzania, Togo, Uganda, and Zambia. Populations also occur in Algeria, Egypt, and Yemen.
Despite its wide distribution and commonness, little is known about the biology and actual occurrence of the species. It reproduces mainly between June and November. The females give birth to 5-6 small cubs at least 3-4 times a year. Life expectancy in the wild is 2.5–3 years.
Its natural habitats are dry savanna, moist savanna, subtropical or tropical moist shrubland, arable land, [6] pastureland, rural gardens, urban areas, irrigated land, and seasonally flooded agricultural land.
The Nile rat has gained traction as a useful nutritional model to study Type 2 Diabetes (T2DM). The Nile Rat gets Metabolic Syndrome that develops into diet-induced Type 2 Diabetes that is similar to human T2DM: insulin resistance, hyperinsulinemia, increased body fat, hypertension, elevated Triglycerides with decreased High-Density Lipoproteins, and eventually hyperglycemia and beta cell failure resulting in depressed insulin and end-stage diabetes that includes severe ketosis. The beta cell failure follows the same course as the five-stage decline documented in humans with T2DM. [7]
The Old World rats and mice, part of the subfamily Murinae in the family Muridae, comprise at least 519 species. Members of this subfamily are called murines. In terms of species richness, this subfamily is larger than all mammal families except the Cricetidae and Muridae, and is larger than all mammal orders except the bats and the remainder of the rodents.
The greater Egyptian gerbil is a small rodent in the family Muridae. It is native to northern Africa where it inhabits sandy deserts, semi-arid areas and oases. It is a common species, and the International Union for Conservation of Nature has rated its conservation status as being of "least concern".
The pale fox is a species of fox found in the band of African Sahel from Senegal in the west to Sudan in the east. It is one of the least studied of all canid species, in part due to its remote habitat and its sandy coat that blends in well with the desert-like terrain.
The Guinean grass rat is a species of rodent in the family Muridae. It is found in Benin, Ghana, Togo, possibly Cameroon, possibly Central African Republic, possibly Ivory Coast, possibly Guinea, possibly Liberia, and possibly Sierra Leone. Its natural habitats are moist savanna, subtropical or tropical dry shrubland, subtropical or tropical moist shrubland, arable land, pastureland, and urban areas.
Neumann's grass rat is a species of rodent in the family Muridae. It is found in Ethiopia, Somalia, Sudan, Tanzania, and possibly Kenya. Its natural habitats are dry savanna and subtropical or tropical dry shrubland.
The African wading rat or African water rat is a species of rodent in the family Muridae. It is native to Africa, where it occurs in Angola, Burundi, Cameroon, Republic of the Congo, Democratic Republic of the Congo, Equatorial Guinea, Ethiopia, Gabon, Kenya, Liberia, Rwanda, South Sudan, Uganda, and Zambia.
The pouched gerbil is a species of rodent in the family Muridae. It is the only species in the genus Desmodilliscus and the subtribe Desmodilliscina.
The Ethiopian forest brush-furred rat or golden-footed brush-furred rat, is a species of rodent in the family Muridae. It is endemic to Ethiopia where its natural habitat is subtropical or tropical moist montane forests. It is threatened by habitat loss.
The Guinea multimammate mouse is a species of rodent in the family Muridae found in Benin, Burkina Faso, Burundi, Cameroon, the Central African Republic, Chad, the Republic of the Congo, the Democratic Republic of the Congo, Ivory Coast, Ethiopia, Gambia, Ghana, Guinea, Guinea-Bissau, Kenya, Liberia, Mali, Mauritania, Morocco, Niger, Nigeria, Rwanda, Senegal, Sierra Leone, Sudan, Togo, and Uganda. Its natural habitats are subtropical or tropical dry forests, dry savanna, moist savanna, subtropical or tropical dry shrubland, subtropical or tropical moist shrubland, arable land, rural gardens, urban areas, and irrigated land. They weigh between 12 and 105 grams.
The Yemeni mouse is a species of rodent in the family Muridae. It is found in Saudi Arabia and Yemen. It is the only modern member of the tribe Praomyini to be found outside of Africa.
The Angolan multimammate mouse is a species of rodent in the family Muridae. It is found in Angola and Democratic Republic of the Congo. It was formerly classified in the genus Myomyscus but has been reclassified into the genus Mastomys. Its natural habitats are dry savanna and moist savanna.
The Ethiopian white-footed mouse or white-footed stenocephalemys is a species of rodent in the family Muridae. It lives in Ethiopia and Eritrea. Its natural habitats are tropical moist montane forest and tropical high-altitude shrubland.
Stenocephalemys is a genus of rodent in the family Muridae. The genus is endemic to Ethiopia.
German's one-toothed moss mouse is a species of rodent in the family Muridae which occurs in the mountains of southeastern New Guinea.
The Chingawa forest rat is a species of rodent endemic to Ethiopia. It is the only member of the monotypic genus Chingawaemys. It was only described in 2021, when it was discovered during a broad phylogenetic analysis of the tribe Praomyini.
Praomyini is a tribe of muroid rodents in the subfamily Murinae. Species in this tribe are found mostly throughout Sub-Saharan Africa, but one species is found in North Africa, and another is found in the Arabian Peninsula.
Arvicanthini is a tribe of muroid rodents in the subfamily Murinae. Almost all recent species in this tribe are or were found in Africa aside from one species, the Indian bush rat, which is found in South Asia and Iran. However, some fossil Golunda species from India and the genus Parapelomys are thought to have also occurred outside Africa, and one species in the fossil genus Saidomys may have also occurred in Afghanistan.
