Fig. 1
From: Overwintering aggregation patterns of European catfish Silurus glanis
Bathymetric map of “Etang des Aulnes” and experimental setup. The bathymetry was calculated at the water level of 11.14 m above sea level. Acoustic receivers and their associated synchronizing tags are represented by grey dots. Reference tags are symbolized by pale grey squares. Hourly temperature profiles are indicated by crosses; location 42 is the deepest in the lake