Recrudescense of sexual activity in a reproductively quiescent colony of the Damaraland mole-rat, by the introduction of a genetically unrelated male – a case of incest avoidance in “queenless” colonies. Synonyms for Damaraland mole rat in Free Thesaurus. In seasonally flooded areas, they build an extensive mound to keep living chambers and food stores above the high-water mark. Make your way onto the nice list and give today. At the Smithsonian's National Zoo, they eat fed tubers, sweet potatoes, turnips, carrots, kale and leaf eater biscuits. Even in other areas, the main living and storage rooms are located in higher ground, and from there tunnels extend in several directions. Individuals from the same system live peacefully together but are extremely aggressive toward individuals originating in other colonies. When the rains come, the mole rats cooperate and dig furiously. Because they live in arid environments, this means that Damaraland mole-rats can be extremely active over short periods; a typical colony has been estimated to excavate three tons of soil over a two-week period. [17] While her removal causes previously non-reproductive females to become fully fertile, they will only mate with unrelated males, thus avoiding incest within the colony. "Mole rat" is applied to rodents in several families, but the article focused on the Bathyergidae, which includes the Damaraland mole rat (Cryptomys damarensis) and the naked mole rat … To better understand the molecular mechanisms underlying the traits of African mole rats, we developed an improved NMR genome assembly, determined the genome sequence of the related ∼160 g Damaraland mole rat (DMR, Fukomys damarensis) found in the arid regions of southwest Africa (Figures 1A and 1B), and sequenced the transcriptomes of additional subterranean rodents. Dominance is linear and related to gender and body mass where the dominant male is the heaviest male in the colony and the dominant female is one of the heaviest individuals in the colony [57] , [58] . How deep they dig their tunnels depends on soil consistency: the looser the soil, the deeper the burrow. [14] New colonies are established by unrelated males and females, which become the new breeding pair. Even when our gates are closed, we are still here, working as always to save species. The Damaraland mole-rat, found in Kalahari red sands, displays an elaborate extended form of cooperative breeding. Damaraland mole-rats can give a very serious bite and should be handled with caution. Educational Activities You Can Do at Home, About the Smithsonian Conservation Biology Institute, A Look Back At Panda Cub Xiao Qi Ji's Exciting November. The colony is eusocial, consisting of a single breeding pair and their non-reproductive offspring. [4] Non-reproductive males have smaller testes than their reproductive counterparts and produce little, if any, viable sperm. These mole rats exhibit co-operative breeding, where some individuals forgo reproduction to help others breed. These results contrast sharply with colony defense in the related naked mole-rat and suggest that investment in defense activities in Damaraland mole-rats primarily reflects repulsion of potential competitors for breeding status. Their large lower incisors can move separately. [17] The pups are initially hairless, with closed eyes, and only weigh 8 or 9 grams. As Damaraland mole-rat pups are highly altricial and hairless, social thermoregulatory benefits derived from huddling might therefore constitute an important form of social and, arguably, cooperative behaviour (Arnold, 1990, Kotze et al., 2008). comm. Share the story of this animal with others. Damaraland mole rat synonyms, Damaraland mole rat pronunciation, Damaraland mole rat translation, English dictionary definition of Damaraland mole rat. Their large lower incisors can move separately. Like naked mole-rats, Damaraland mole rats exhibit co-operative breeding, where some individuals forgo reproduction to help others breed. The smaller animals do most of the work. This type of reproduction is most common among insects like honeybees. See more » Psamment In USDA soil taxonomy, a psamment is defined as an entisol which consists basically of unconsolidated sand deposits, often found in shifting sand dunes but also in areas of very coarse-textured parent material subject to millions of years of weathering. Noun 1. One breeding pair was at least 15.5 years of age when they died in captivity. Antonyms for Damaraland mole rat. In such cases, dispersal usually only occurs during rainy weather, ensuring that digging will be relatively easy once a suitable location has been found. Gestation lasts 78 to 92 days and the average litter size is three young. In naked mole-rats the chances of independent reproduction are considerably lower than in Damaraland mole-rats (naked mole-rats: 0.1%, n 4000; Damaraland mole-rats 8%, n 403; Jarvis et al., 1994), providing a greater incentive to sacrifice current direct fitness. [7], Damaraland mole-rats live in networks of tunnels,[8] which they dig with their front teeth. Along with the smaller, less hairy, naked mole rat, it is one of only two known eusocial mammals. h.[4], Despite living in an entirely subterranean environment, Damaraland mole-rats exhibit circadian rhythms, and are active primarily during the day. Non-reproductive individuals are not truly sterile, however, and become capable of reproduction if they establish a colony of their own. Extending mole rat burrows to find more underground food is all but impossible during droughts because of soil conditions. 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