• Corpus ID: 81768693

The role of the ram in the impala (Aepyceros melampus) mating system

  title={The role of the ram in the impala (Aepyceros melampus) mating system},
  author={Colin Malcolm Oliver},
  • C. Oliver
  • Published 24 July 2002
  • Environmental Science
The role of territoriality was investigated using 25 impala rams in a site in South Africa. Field data were used to determine known rams as territorial and bachelors, as well as aspirant and indeterminate. The mean territorial tenure was 67.25 days, with a mean territory size of 21.0 ± 11.27 ha, compared to the home ranges of 34.1 ha ± 9.03 ha for territorial and 58.8 ha ± 33.35 ha for bachelor males. Territory boundaries seemed to remain constant through the season, and are smaller when… 
Factors influencing productivity in sympatric populations of Mountain Reedbuck and Grey Rhebok in the Sterkfontein Dam Nature Reserve, South Africa
Productivity of grey rhebok and mountain reedbuck was studied at Sterkfontein Dam Nature Reserve (eastern Free State) between September 1999 and May 2002. Within a study area of 550 ha, all herds of
Stress as a facilitator? Territorial male impala have higher glucocorticoid levels than bachelors
The hypothesis that territorial individuals have higher glucocorticoid concentrations than non-territorial bachelors, in wild impala in the Serengeti ecosystem supports the hypothesis that elevated GC levels may be beneficial and act as a facilitator of a male’s reproductive potential.
Rutting vocal display in male impala (Aepyceros melampus) and overlap with alarm context
In the studied male impala, rutting snorts within bouts of rutts calls were longer and had higher values of the upper quartile in the call spectra than alarm snorts produced towards potential danger.
Short-Term Behavioural Responses of Impalas in Simulated Antipredator and Social Contexts
It appears that predators’ vocalizations stimulate anti-predator behaviours such as vigilance and movement at the expense of foraging, whereas males' vocalizations increase individuals’ displacements atThe expense of vigilance.
Consequences of climate-induced vegetation changes exceed those of human disturbance for wild impala in the Serengeti ecosystem
The results show that impala had elevated GC levels when forage quality was low, even with significant protection and reduced human disturbance.


The role of territoriality in the mating system of the springbokantidorcas marsupialis
Male springbok showed no pre- or post-copulatory guarding behaviour, whilst oestrous females did not choose to join larger groups in order to avoid harassment by other males, and only males who successfully defended territories were observed to breed with females.
Production parameters of the impala, Aepyceros melampus
In a long-term study of the impala in the Kruger National Park, certain production parameters have become available that can be used to evaluate the gamefarming potential of this animal.
The herding activity of the male, the main forms of his courtship, and “roaring”, which occurs in the context of courting and as showing off and threat displays in male rivalry, are described.
Population Studies of Impala in Southern Rhodesia
Studies of the impala, Aepyceros melampus Lichtenstein, in Southern Rhodesia during 1959–60 suggest that this species is a successional animal, favored by factors which open up forest, dense woodland or tall grassland, and which will move a considerable distance to obtain food and cover in the absence of these factors.
Some costs of maintaining a perennial territory in the springbok, Antidorcas marsupialis
Summary The territorial behaviour of male springbok was investigated over a period of 12 months along the Nossob riverbed in the southern Kalahari. Springbok males maintain perennial territories
Morphometries and reproduction in a population of springbok Antidorcas marsupialis in the semi-arid southern Kalahari
Rams appeared to be physiologically capable of reproductive activity throughout the year, and responded to various stimuli by exhibiting rutting and/or mating behaviour and the possible stimuli are discussed.
Observations on social organization, behaviour and distribution of impala In the Jack Scott Nature Reserve
Seasonal changes in social organisation and distribution of impala were recorded over a one year period in the Jack Scott Nature Reserve, Transvaal. During the rut in April and May of 1971, there was
Home range, dispersal and the clan system of impala
Female impala enhance their breeding success by longevity rather than competition and this was achieved through the clan system and its variation is related to cycling of resources in neighbouring habitats, and to differences in territorial behaviour by adult males.
Interactions between impala and oxpeckers at Matobo National Park, Zimbabwe
Interactions between yellow-billed oxpeckers and impala were investigated at Matobo National Park, Zimbabwe during the wet and dry seasons, and an interaction was apparent between the tick-removal strategies of oxpecker and their impala hosts.
Effects of annual rainfall and habitat types on the body mass of impala (Aepyceros melampus in the Zambezi valley, Zimbabwe
Body mass is often considered as a good indicator of body condition of individuals in ungulates, hence of their fitness, and thus, may be used as an index to monitor the status of populations subject