[en] Initially developed so that an individual could be recognised in mark-recapture studies of aquatic animals, fluorescent VIE (Visible Implant Elastomer) tags are used here for a new application in ethometry: the study of behavior of transparent animals in dim light or in darkness using automatic tracking technology. The application and validation of this multitracking method is tested in the context of research on the glass eel (Anguilla anguilla) estuarine migratory behavior, a crucial point to better understand the dynamics of this endangered species. The method makes it possible to measure the activity (notably distance and speed) of four individuals as a function of tidal and nycthemeral rhythms in the same flume (circular aquarium simulating the river or estuarine conditions) across a wide time scale (from seconds to weeks).
INRA/UPPA UMR ECOBIOP St Pée sur Nivelle France ; Behavioural Biology Unit: Laboratory of Fish and Amphibian Ethology, ULg
Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS ; INRA ; Tournesol Hubert Curien WBI ; EGIDE ; Région Aquitaine