Ocean climate and El Niño impacts on survival of Cassin’s Auklets from upwelling and downwelling domains of British Columbia

Douglas F. Bertram, Anne Harfenist, and Barry D. Smith  Abstract: We report on the survival of populations of Cassin’s Auklet (Ptychoramphus aleuticus) that breed on two oceanic colonies in British Columbia: Triangle Island, near the northern end of the California Current Ecosystem, and Frederick Island to the north in the Alaska Current Ecosystem. We captured