A dispersive morph in the naked mole-rat

  title={A dispersive morph in the naked mole-rat},
  author={M. Justin O'Riain and Jennifer U. M. Jarvis and Chris G. Faulkes},
CLOSE inbreeding is known for a variety of small mammal species1–4 for which a high probability of mortality during dispersal makes helping and delayed maturation a relatively secure fitness option5. Prolonged inbreeding, however, is usually associated with lowered fitness6,7, and it has been shown that most highly inbred small mammals8 and social insects9 have inbreeding-avoidance mechanisms that promote some degree of outbreeding. However, previous field and laboratory research on the naked… 

Dispersal and new colony formation in wild naked mole-rats: evidence against inbreeding as the system of mating

Evidence of dispersers and outbreeding in colonies of wild naked mole-rats that suggests that inbreeding is not the system of mating for this species and that outbreeding is probably frequent.

Growth affects dispersal success in social mole-rats, but not the duration of philopatry

It is shown that in Damaraland mole-rats, males that subsequently disperse successfully grow faster than other non-reproductive males, and contrary to the suggestion that faster growth represents a developmental specialization for early dispersal, fast-growing and slow-growing males remained equally long in their natal groups.

New colony formation in the “highly inbred” eusocial naked mole-rat: outbreeding is preferred

It is shown that in laboratory colonies in which each individual had an equal number of familiar siblings and unfamiliar distant kin (UDK) as potential mates, mating pairs were significantly more likely to consist of UDK.

The Mating Pattern of Captive Naked Mole-Rats Is Best Described by a Monogamy Model

An in-depth microsatellite-based kinship analysis on captive colonies shows that each mole-rat colony contains a single monogamous breeder pair, which translates to a reproductive skew of 100% for both sexes, and favors monogamy as the best-fitting model to describe naked mole- rat reproduction patterns.

Damaraland and naked mole-rats: Convergence of social evolution

African mole-rats (Family: Bathyergidae) have become well established as a model taxon with which to investigate the evolutionary origins and maintenance of cooperative breeding and there have been convergent gains and losses of sociality within the family.

Natal dispersal in two mice species with contrasting social systems

The results showed that the natal dispersal of these two species differ; both sexes of the mound-building mice dispersed later than the house mice, where a difference between sexes also occurs; house mice males dispersed earlier than females.

Social Behavior in Naked Mole-Rats: Individual Differences in Phenotype and Proximate Mechanisms of Mammalian Eusociality.

Naked mole-rats provide the opportunity to examine the proximate mechanisms controlling individual differences in social behavior, shedding light on how mammals live in complex social groups.

Intracolony aggression in the eusocial naked mole-rat, Heterocephalus glaber

Queen shoving may have several functions, depending on social context, in inhibiting reproduction in subordinates of both sexes, maintaining social order, and in inciting work-related behaviours in colony members, all of which ultimately increase the reproductive success of queens.



Investigation of genetic diversity in wild colonies of naked mole-rats (Heterocephalus glaber) by DNA fingerprinting

The lack of polymorphism in the MHC I questions its possible role in individual odour recognition in this species of rodent, and suggests that these animals are highly inbred, and that there may be little or no genetic diversity within and between closely neighbouring colonies in the wild.

DNA "fingerprinting" reveals high levels of inbreeding in colonies of the eusocial naked mole-rat.

It is found that DNA fingerprints of colony-mates were strikingly similar and that between colonies they were much more alike than fingerprints of non-kin in other free-living vertebrates.

Mammalian eusociality: a family affair.

Termite Eusocial Evolution: A Re-Examination of Bartz's Hypothesis and Assumptions

It is concluded that inbreeding according to Bartz's model may be a contributing factor in the social evolution of some termites but is probably not the major initiating or sustaining factor in termite social evolution.

Behavior and genetic variation in natural populations.

An analysis of allelic variation at genetic loci controlling several esterases and hemoglobin indicates that wild populations of the house mouse are characterized by fine-scale genetic subdivision, which, through the territorial behavior of family groups (tribes), is achieved even in the absence of physical or ecological barriers to migration.

Avoiding inbreeding: at what cost?

Inbreeding avoidance behaviors.

Individuality, social behavior, and reproductive success in yellow-bellied marmots

Current theory suggests that population dynamics are the consequence of the repro? ductive strategies of individuals. Individual differences should be expressed in reproductive output, dispersal,

Genetics of the Evolutionary Process

1. The Unity and Diversity of Life2. Genetic Continuity and Change3. Mutation and Genetic Variability4. Normalizing Natural Selection5. Balancing Selection and Chromosomal Polymorphism6. Balancing

The Ecology of Animal Movement

The editors' aim has been to concentrate on current and fundamental problems in movement to stimulate interest by enabling the authors to put forward new ideas in a well- reasoned and coherent way.