TY - RPRT TI - Interacting effects of latitude, mass, age, and sex on winter survival of Surf Scoters ( Melanitta perspicillata ): Implications for differential migration AU - Brian D. Uher-Koch AU - Daniel Esler AU - Samuel A. Iverson AU - David H. Ward AU - Sean Boyd AU - Molly Kirk AU - Tyler L. Lewis AU - Corey S. VanStratt AU - Katherine M. Brodhead AU - Jerry W. Hupp AU - Joel A. Schmutz PY - 2016 DO - 10.1139/cjz-2015-0107 UR - https://pubs.usgs.gov/publication/70168860 ID - 70168860 ER -