Fig. 1 Distribution of ampeliscid amphipods on the Canadian Beaufort Shelf, with abundance partitioned by the Jenks criterion (Jenks and Caspall1971) and color coded (left inset of each map).aAmpelisca macrocephala;bByblisspp.;cHaploops laevis;dHaploopssp.;eAmpeliscasp.;fHaploops tubicola;g...