Allometric trajectories of body and head morphology in three sympatric Arctic charr ( (L.)) morphs.

A study of body and head development in three sympatric reproductively isolated Arctic charr ( (L.)) morphs from a subarctic lake (Skogsfjordvatn, northern Norway) revealed allometric trajectories that resulted in morphological differences. The three morphs were ecologically assigned to a littoral omnivore, a profundal benthivore and a profundal piscivore, and this was confirmed by genetic analyses (microsatellites).