NBS cod northward  movement
RAD libraries were  prepared as described in Drinan et al. 2018, Drinan DP, Gruenthal KM, Canino  MF, Lowry D, Fisher MC, Hauser L. 2018. Population assignment and local  adaptation along an isolationbydistance gradient in Pacific cod (Gadus  macrocephalus). Evolutionary Applications 11(8):1448-1464.