TY - RPRT TI - Energy density and variability in abundance of pigeon guillemot prey: Support for the quality-variability trade-off hypothesis AU - Michael A. Litzow AU - John F. Piatt AU - Alisa A. Abookire AU - Martin D. Robards PY - 2004 DO - 10.1111/j.0021-8790.2004.00890.x UR - https://pubs.usgs.gov/publication/70026389 ID - 70026389 ER -