PBBs (as a group) were not found in otters (Lutra canadensis) from a region relatively remote from industrial sites in north eastern Alberta (Canada) (Somers et al., 1987).
北部东阿尔伯达省（加拿大）较偏远地区的水獭身上没有发现多溴联苯（一族）（Somers等人，1987年）。