Fig. 1From: Differential expression of the aryl hydrocarbon receptor pathway associates with craniofacial polymorphism in sympatric Arctic charrDrawings of adult heads of the four Arctic charr morphs in Thingvallavatn, Iceland. The two limnetic morphs, piscivorous (PI) and planktonivorous (PL) have terminal mouths and pointed snouts and the two benthic morphs, large benthivorous (LB) and small benthivorous (SB) have blunter snouts and more sub-terminal mouths. Scale bars represent 1 cm. (drawings by Eggert Pétursson)Back to article page