Lion population dynamics: do nomadic males matter?

  title={Lion population dynamics: do nomadic males matter?},
  author={Natalia Borrego and Arpat Ozgul and Rob Slotow and Craig Packer},
  journal={Behavioral Ecology},
Key population processes are sometimes driven by male dynamics, but these drivers are often overlooked because of the scale over which they operate. Lions (Panthera leo) provide an ideal case study for investigating factors governing male dynamics and their influence on population sustainability. Lions display sexually selected infanticide, and resident males must defend their offspring from nomads that may have dispersed over long distances; factors affecting male–male competition over large… Expand

Paper Mentions

Genetic rescue of an isolated African lion population
Although genetic rescue is a valuable tool for the recovery of inbred, isolated populations, genetic augmentation should be performed at regular intervals to ensure continued population viability. Expand


Do males matter? The role of males in population dynamics
The results of this study show that the males can have a substantial effect on population dynamics, particularly so when human influences result in biased sex ratios. Expand
Male turnover reduces population growth: an enclosure experiment on voles.
It is shown that recruitment and female survival dramatically declined and that reproduction commenced slightly later in treatment populations compared with control populations, and suggested how predation and social factors interact mechanistically. Expand
Bears are simply voles writ large: social structure determines the mechanisms of intrinsic population regulation in mammals
It is shown that intrinsic population regulation interacting with extrinsic mortality agents may occur irrespective of taxon, life history and body size, and that experimental model populations are useful to elucidate natural populations of other species with similar social systems. Expand
Demographic side effects of selective hunting in ungulates and carnivores.
Selective harvesting regimes are often implemented because age and sex classes contribute differently to population dynamics and hunters show preferences associated with body size and trophy value.Expand
Optimal group size, dispersal decisions and postdispersal relationships in female African lions
We used 40 years of long-term data to test whether dispersal decisions of female African lions, Panthera leo, are sensitive to variations in pride size, interpride competition and the quality ofExpand
The Evolution of Sex-Biased Dispersal in Lions
Most female lions remain in their natal pride for their entire lives, but about a third emigrate before they reach four yrs of age. Most emigrating females leave either when they are evicted by anExpand
Social relationships affect dispersal timing revealing a delayed infanticide in African lions
All males that dispersed before 31 months died during transience and that dispersal coincided, regardless of age or body condition, with the arrival of unfamiliar adult males, indicating a high turn-over of territorial males can also induce a previously undescribed, ‘delayed infanticide’. Expand
Sustainable trophy hunting of African lions
A simple non-invasive technique for estimating lion age in populations lacking long-term records is presented, and it is suggested that quotas would be unnecessary in any male-only trophy species where age determination could be reliably implemented. Expand
Modeling the effects of trophy selection and environmental disturbance on a simulated population of African lions.
An individually based, spatially explicit, stochastic model is used, parameterized with nearly 40 years of behavioral and demographic data on lions in the Serengeti, to examine the separate effects of trophy selection and environmental disturbance on the viability of a simulated lion population in response to annual harvesting. Expand
Sex‐Biased Harvesting and Population Dynamics in Ungulates: Implications for Conservation and Sustainable Use
It is shown that the interaction between sperm limita- tion and harvests with highly male-biased sex ratios can lead to greatly reduced female fecundity and population collapse and suggest that present methods of harvest- ing may not be optimal, or viable, in the long term. Expand