We have developed idTracker, a software to follow individuals in a group without error propagation.
From a single video of group behavior of any length, it gives the trajectory of each animal, typically with >99% frames correctly identified.
Validated species include fruitflies (Drosophila melanogaster), mice (Mus musculus), larval and adult zebrafish (Danio rerio), nine-spine stickleback (Pungitius pungitius), medaka (Oryzias latipes), European sea bass (Dicentrarchus labrax), Hemigrammus rhodostomus and ants (Atta cephalotes and Atta columbica).
A. Pérez-Escudero, J. Vicente-Page, R.C. Hinz, S. Arganda, G.G. de Polavieja (2013) idTracker: Tracking individuals in a group by automatic identification of unmarked animals (submitted)
Soon be downloadable from www.idtracker.es
We will soon release idSocial, software to analyze social behavior
We have also developed multiwellTracker that tracks individuals separated in circular plates, see www.multiwelltraker.es