Whether treatment programs are effective at rehabilitating rapists is yet to be determined empirically. From a scientist-practitioner perspective, treatment should be based on an empirical understandi...
This study examined the locomotor behavior of wild Bornean orangutans (P. p. wurmbii) in an area of disturbed peat swamp forest (Sabangau Catchment, Indonesia) in relation to the height in the canopy,...
This report summarizes a variety of research findings and tips from web designers on how to make web sites more appealing, educational and entertaining for children. Given the great importance of comp...
The behavioral development of young apes is influenced by their physical and social environments. Deficient or limited environments can result in reproductive insufficiencies (see Beck and Power, 1988...
The Asian apes, orangutans and gibbons, possess unusual social systems among anthropoid primates. Social groups of gibbons consist of mated adult pairs and their offspring; mature orangutans are prima...
Recent research suggests profound sex and sexual orientation differences in sexual response. These results, however, are based on measures of genital arousal, which have potential limitations such as ...
Orangutans are the only great apes found outside of Africa. At present, they occur only on the two large Sunda‐shelf islands of Sumatra and Borneo. Most researchers recognize two separate subspecies, ...
Intersexual conflicts over mating can engender antagonistic coevolution of strategies, such as coercion by males and selective resistance by females. Orangutans are exceptional among mammals for their...
During a four‐year period, more than 6,800 hours of observation were collected on 58 individually recognized wild orangutans in a 35‐km2 study area at the Tanjung Puting Reserve, Kalimantan Tengah (Ce...
Data on the presence of wild orang-utans, Pongo pygmaeus, in the Ketambe area (Sumatera, Indonesia), collected over 12 consecutive years, were analysed to study population structure and residential st...
Comparative studies of birth interval dynamics in wild primates suffer from several problems of analysis and interpretation: (1) the data are always right-censored, (2) sample sizes are usually small,...
Both in the wild and in captivity, a marked and enduring arrest of secondary sexual developmental occurs in some male orangutans (Pongo pygmaeus) (Kingsley [1982] The Orang-Utan: Its Biology and Conse...
Behavioural observations suggest that orang‐utans are semi‐solitary animals with females being philopatric and males roaming more widely in search of receptive partners, leading to the prediction that...
At first sight, the orangutan may well be the least spectacular of the great apes. In comparison with its African cousins, this solitary creature seems to lead a far less exciting life. Superficially,...
At Tanjung Puting, adolescent female orangutans were the most social of all age/sex classes and should not be described as solitary or even semi-solitary. Non-exclusive groupings involving adolescent ...
Although orang-utans live solitary lives most of the time, they have a complex social structure and are characterized by extreme sexual dimorphism. However, whereas some adult male orang-utans develop...
Abstract Striking secondary sexual traits, such as brightly colored “sexual skin,” capes of hair, beards, and other facial adornments occur in adult males of many anthropoid primate species. This revi...