Foraging Behavior and Physiological Adaptation for Diving in Thick-Billed Murres

Foraging behavior and physiological adaptations for diving were studied in Thick—billed Murrer, Uria lomiva, in the field and laboratory. Electronic, light—emitting diode, and capillary recording devices were used to measure foraging behavior. Individual dives were a flattened U shape in profile, and occurred in bouts lasting °15 min. Dive patterns were nocturnal; most dives occurred between 2000 and 0400. Murres probably concentrate their...