Isaac Planas-Sitjà



Université libre de Bruxelles, CP 231
Bd. du Triomphe, B-1050 Bruxelles

E-mail: iplanass [at]
Tel: 02 650 55 28 (from abroad +32 2 650 55 28)
Fax: 02 650 59 87 (from abroad +32 2 650 59 87)


Animal Behaviour: I am interested in animal behaviour in general but more precisely in collective dynamics. The ability of animals to reach complex decisions with simple rules and often poor information about the environment is fascinating. I aim to quantify the implications of personality at the collective level and better understand the existing synergies between two decision levels: individual and collective.

Conservation Biology: Based on my background (Biodiversity and Conservation Ecology) I use tools from the study of collective systems to better understand the biology of endangered social and gregarious species and therefore help to preserve their ecological niche.

Behavioural Ecology: I study the evolutionary constraints and the adaptive value of behavioural plasticity and personality variation. With the use of quantitative genetics, we are currently studing the origins of the behavioural variability in the American cockroach.

“While the individual man is an insoluble puzzle, in the aggregate he becomes a mathematical certainty”

– W. Winwood Reade cited by Sherlock Holmes –