Predation, group size and mortality in a cooperative mongoose, Suricata suricatta.

@article{CluttonBrock1999PredationGS,
  title={Predation, group size and mortality in a cooperative mongoose, Suricata suricatta.},
  author={Tim H. Clutton‐Brock and David Gaynor and G. M. McIlrath and Andrew D. C. MacColl and Ruth Kansky and P. Chadwick and Marta B. Manser and John D. Skinner and Peter N. M. Brotherton},
  journal={Journal of Animal Ecology},
  year={1999},
  volume={68},
  pages={672-683}
}
1. In social mammals where group members cooperate to detect predators and raise young, members of small groups commonly show higher mortality or lower breeding success than members of large ones. It is generally assumed that this is because large group size allows individuals to detect or repel predators more effectively but other benefits of group size may also be involved, including reduced costs of raising young and more effective competition for resources with neighbouring groups. 2. To… 

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References

SHOWING 1-10 OF 24 REFERENCES

Reproduction and survival of suricates (Suricata suricatta) in the southern Kalahari

The demography of Kalahari suricates (Suricata suricatta) resembles that of other social mongooses, but high rates of group extinction have been found in other cooperative breeders and may occur because breeding success and survival show inverse density dependence.

Why Are Diurnal Primates Living in Groups

A critical test is proposed of the hypothesis that increasing group size should lead to reduced predation risk by comparing demographic patterns between areas where predators are still present and where they have disappeared and the results provide strong support for the predation-feeding competition theory.

Costs of cooperative behaviour in suricates (Suricata suricatta)

Here it is provided of one form of cooperative behaviour that is seldom performed by parents and has substantial energetic costs to helpers, in the cooperative mongoose, Suricata suricatta, non–breeding adults commonly babysit young pups at the natal burrow for a day at a time.

Diet and foraging behaviour of group‐living meerkats, Suricata suricatta, in the southern Kalahari

The timing of foraging activity altered over the months in response to changes in daylength and thermoregulatory constraints, and the implications of an insect prey base for meerkat socioecology are discussed.

The costs and effectiveness of vigilance behaviour in the Dwarf Mongoose: implications for fitness and optimal group size

Group size is shown to be a function of the efficiency of group protection mechanisms such as vigilance and group attack of ground predators and Maximal fitness gains at the level of the individual are attained at a group size lower than the observed mean group size.

Band Structure and Failures of Reproductive Suppression in a Cooperatively Breeding Carnivore, the Slender-Tailed Meerkat (Suricata Suricatta)

The data show that meerkats employ a range of reproductive strategies: bands exhibiting a spectrum of reproductive suppression coexist, and individuals respond to the opportunities afforded by their social environments.

‘Helpers’in fox society

It is reported that non-breeding vixens occur in fox groups in some habitats and are subordinate to the breeding females, and may feed, guard, groom and play with the cubs of the breeding vixen within their group.

Dispersal and extra-territorial prospecting by slender-tailed meerkats (Suricata suricatta) in the south-western Kalahari

Dispersal in slender-tailed meerkats or suricates, Suricata suricatta, in the south-western Kalahari occurred mainly during the early breeding season, and was age- and sex-dependent. Among yearlings,