To assess the correlation between four visual morphological types based on body colour and shape (fario trout, FT ; shiny fario, SFT ; presmolt trout, PST; typical smolt ST) of juvenile brown trout Salmo trutta during downstream spring migration and the biological form at the adult stage (river or sea), mark–recapture experiments were carried out over a period of 23 years. Evidence is provided that the visual SFT type is not a...

The genetic variability of 11 French pike Esox lucius populations from rivers or extensive aquaculture ponds was analysed using seven microsatellite markers. The fish stocking of eastern European pike in French rivers is widespread, so five supplementary populations from this region were also analysed. Genetic variability within the French population was small, and similar to that previously found in Europe for this species. F...