Fractal long-range correlations in behavioural sequences of wild chimpanzees: A non-invasive analytical tool for the evaluation of health

Citation
Cl. Alados et Ma. Huffman, Fractal long-range correlations in behavioural sequences of wild chimpanzees: A non-invasive analytical tool for the evaluation of health, ETHOLOGY, 106(2), 2000, pp. 105-116
Citations number
34
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Animal Sciences","Neurosciences & Behavoir
Journal title
ETHOLOGY
ISSN journal
0179-1613 → ACNP
Volume
106
Issue
2
Year of publication
2000
Pages
105 - 116
Database
ISI
SICI code
0179-1613(200002)106:2<105:FLCIBS>2.0.ZU;2-4
Abstract
Quantitative evaluation of health impairments in wild chimpanzees was explo red using fractal long-range correlations of behavioural sequences. The hea lth status of 13 chimpanzees in the Mahale Mountains National Park, Tanzani a was evaluated non-invasively using standard behavioural observation and p arasitological analysis of stool samples. Based on these data, individuals were classified as being either healthy or sick. Behavioural sequences were analysed and shown to exhibit long-range power law correlations. The behav ioural sequences of individuals in healthy and sick states were quantitativ ely evaluated using detrended fluctuation analysis of social and non-social behaviours within behavioural sequences. These values were compared and si gnificant differences in long-range correlations were found between health states. Sex differences were also noted, with female social behaviour displ aying a larger fractal dimension than male social behaviour. The fractal di mension of females declined significantly in sick individuals. This analysi s of behaviour provides a new and effective Iron-invasive method to record and evaluate the general state of health and related stress of animals in t he wild. Possible applications of this method in captive situations include the monitoring and evaluating of stress levels over time.