TY - RPRT TI - Breeding at higher latitude as measured by stable isotope is associated with higher photoperiod threshold and delayed reproductive development in a songbird AU - Singh, D. AU - Reed, S. R. AU - Kimmitt, A. A. AU - Alford, K. A. AU - Ketterson, E. D. PY - 2019 DO - 10.1101/789008 UR - https://www.biorxiv.org/content/10.1101/789008v1 ID - 10.1101/789008 ER -