The most well studied aspect of communication in this species is foot drumming. Foot drumming is used by males to call females during the breeding season, but it can also be used to warn other animals that a burrow is occupied. Foot drumming contains both auditory and seismic components. Seismic vibrations have been shown to propagate at least an order of magnitude better than airborne sound between the burrow systems of G. capensis. It is more sensible that cape mole rats use seismic signals over auditory communication because seismic signals travel better and farther underground. It is not know how detection of seismic waves is accomplished in this species, although it is theorized that it is a form of bone conduction. Vocal communication is used, but usually only when the animals are in close proximity to each other.
Chemical signaling and the sense of smell are probably used as well. Tactile communication occurs between mates, rivals, and between mothers and their young. Although this species has eyes, it is unlikely, given their fossorial existence, that they use many visual signals in communication.
Communication Channels: tactile ; acoustic ; chemical
Other Communication Modes: vibrations
Perception Channels: visual ; tactile ; acoustic ; vibrations ; chemical
Cape mole rats are not listed by IUCN or CITES.
CITES: no special status
IUCN Red List of Threatened Species: least concern
Cape mole rats can have a negative impact on agricultural fields and crops.
Negative Impacts: crop pest
No information could be found on economic importance of cape mole rats.
Cape mole rats feed on tubors and roots and may affect plant communities. Their burrowing behavior probably helps to aerate the soil.
Ecosystem Impact: soil aeration
The diet of cape mole rats consists almost exclusively of below ground plant parts, although they have been know to ingest insects, especially ants. The main burrow of G. capensis is used for food storage of tubers, roots, and bulbs. Cape mole rats have been know to bite off the buds of bulbs and tubers to stop them from growing.
Animal Foods: insects
Plant Foods: roots and tubers
Foraging Behavior: stores or caches food
Primary Diet: herbivore (Eats sap or other plant foods)
Cape mole rats are found in the southwestern and southern parts of the Cape of Good Hope Province in South Africa.
Biogeographic Regions: ethiopian
Details of the habitat of this species are lacking in the literature. They apparently occur in areas where the soil is hard, and where tubers are available for food. They can be destructive to tuber crops, so they must be found in agrigultural areas.
Habitat Regions: temperate
Terrestrial Biomes: savanna or grassland
Other Habitat Features: agricultural
Georychus capensis may live as long as 3 years in the wild.
Range lifespan
Status: wild: 3 (high) years.
Average lifespan
Status: wild: 3.0 years.
Georychus capensis has a body length of 150 to 205 mm with a tail addint and additional 15 to 40 mm. Body mass averages about 181.8 g for males and 180.0 g for females. There is variation, however, and individuals may weigh as much as 350 g.
These animals have short limbs and a thick-set body. They have long, thick, fluffy pelage that can completely conceal the tail. The tail looks flattened due to hair along the sides.
They are buff to buff-orange in color with a lighter underside. The hands, feet, and tail of G. capensis are white and they have black or dark brown markings, with white spots on the face. The ears are round with thickened skin and there is a reduction of the eyes, ears and tail due to their fossorial existence.
The claws are relatively weak (considering they are burrowers) and both the claws and front feet are not well adapted to digging.
The incisors are used to loosen the dirt and the claws and front feet are used to move the loosened soil. The incisors are prominent and are not grooved.
It is normal for cape mole rats to have 3 pairs of mammae but 4 are not unusual.
Average mass: 181 g.
Range length: 150 to 205 mm.
Sexual Dimorphism: male larger
Other Physical Features: endothermic ; bilateral symmetry
Average mass: 181 g.
Average basal metabolic rate: 0.637 W.
No information could be found on predation in cape mole rats. It is likely that these animals do experience predation, probably by snakes, or by other animals capable of entering their burrows or digging them up.
Information on the mating system of G. capensis is not available. However, the beginning to the breeding season is signaled when males begin drumming. This behavior is apparently intended to signal females.
Breeding in cape mole rats occurs from August to December. Males call the females by drumming with their hind feet. This drumming usually occurs in June and marks the beginning of the breeding period. Gestation lasts 44 days. Females experience a postpartum estrus and can produce two litters during the season.
Cape mole rats produce an averag of 5.9 young per litter, although they may produce as few as 3 and as many as 10. Young are unfurred at birth, measure 30 to 40 mm, and weigh between 5 and 12 g.
The young develop quickly. Their eyes are open and the fur has grown in completely by the age of 9 days. By 17 days of age, young mole rats can eat solid food. Siblings become aggressive to one another, and disperse from their home by 60 days of age. Adult size is reached by the age of 260 days and young of the previous year breed before their first birthday.
Breeding interval: These animals breed only during the months of August to December, and can produce up to two litters during that time.
Breeding season: Breeding takes place between August amd December.
Range number of offspring: 3 to 10.
Average number of offspring: 5.9.
Average gestation period: 44 days.
Average weaning age: 17 days.
Average time to independence: 60 days.
Average age at sexual or reproductive maturity (female): 10 months.
Average age at sexual or reproductive maturity (male): 10 months.
Key Reproductive Features: iteroparous ; seasonal breeding ; gonochoric/gonochoristic/dioecious (sexes separate); sexual ; fertilization ; viviparous ; post-partum estrous
Average birth mass: 8.4 g.
Average gestation period: 44 days.
Average number of offspring: 5.
Average age at sexual or reproductive maturity (male)
Sex: male: 304 days.
Average age at sexual or reproductive maturity (female)
Sex: female: 304 days.
There are usually 3 to 10 young, born naked. The young are 30 to 40 mm long. The are weaned around the time they start eating solid food, at 17 days of age. No reports of male parental care exist, so it is likely that all care comes from the mother, who provides her offspring with protection, grooming, and milk.
Parental Investment: no parental involvement; altricial ; pre-fertilization (Protecting: Female); pre-hatching/birth (Provisioning: Female, Protecting: Female); pre-weaning/fledging (Provisioning: Female, Protecting: Female); pre-independence (Protecting: Female)
