... studied the cardiac response of the crab Chasmagnathus to different stimulus modalities: a light pulse, an air puff, virtual looming stimuli and a real visual danger stimulus. The first two did not trigger observable behavior, but the last two elicited a clear escape response. We examined the changes...

...E. Keijer; P. J. Butler; A. J. Woakes ABSTRACT Heart rate was monitored in tufted ducklings during first-ever and subsequent voluntary whole-body dives. Although the cardiac response to first-ever dives varied between individuals, the average response to these dives, to the following 20 dives...