Abnormal Coloration in Chimpanzees

How Abnormal Is the Behaviour of Captive, Zoo-Living Chimpanzees?

BACKGROUND Many captive chimpanzees (Pan troglodytes) show a variety of serious behavioural abnormalities, some of which have been considered as possible signs of compromised mental health. The provision of environmental enrichments aimed at reducing the performance of abnormal behaviours is increasing the norm, with the housing of individuals in (semi-)natural social groups thought to be the m...

Abnormal iris coloration in the Campo Flicker, Colaptes campestris: pigmentary color production error?

Long-Term Evaluation of Abnormal Behavior in Adult Ex-laboratory Chimpanzees (Pan troglodytes) Following Re-socialization

Adverse rearing conditions are considered a major factor in the development of abnormal behavior. We investigated the overall levels, the prevalence and the diversity of abnormal behavior of 18 adult former laboratory chimpanzees, who spent about 20 years single caged, over a two-year period following re-socialization. According to the onset of deprivation, the individuals were classified as ea...

Characterizing abnormal behavior in a large population of zoo-housed chimpanzees: prevalence and potential influencing factors

Abnormal behaviors in captive animals are generally defined as behaviors that are atypical for the species and are often considered to be indicators of poor welfare. Although some abnormal behaviors have been empirically linked to conditions related to elevated stress and compromised welfare in primates, others have little or no evidence on which to base such a relationship. The objective of th...

Chimpanzees

that, while humans can do things that fruit flies can't — such as writing a quick guide for Current Biology — fruit flies can also do things that humans can't — such as flying or walking upside down on the ceiling. But rice beats both fruit flies and humans, with 62,435 genes, and it is hard to argue that rice are 3–5 times as complex as humans or fruit flies. So if the sheer number of genes do...