... received modafinil, suggesting a fitness cost. In contrast, modafinil had no measurable impact on male or female snow bunting behavior, nestling growth rates or time to fledging. We suggest male longspurs compromise and maintain vigilance at their nests in lieu of sleeping because of the increased...

...Michael L. Kelly; Richard A. Peters; Ryan K. Tisdale; John A. Lesku ABSTRACT Reduced vigilance is the conspicuous cost of sleep in most animals. To mitigate against this cost, some birds and aquatic mammals have evolved the ability to sleep with one-half of their brain at a time, a phenomenon known...

...Sam Ridgway; Mandy Keogh; Don Carder; James Finneran; Tricia Kamolnick; Mark Todd; Allen Goldblatt SUMMARY The present study reports the first use of a choice visual–vocal response time cognitive task, during 72 or 120 h of continuous auditory vigilance. Two adult bottlenose dolphins ( Tursiops...

...Sam Ridgway; Don Carder; James Finneran; Mandy Keogh; Tricia Kamolnick; Mark Todd; Allen Goldblatt SUMMARY The present report describes the first study of continuous vigilance in dolphins. Two adult bottlenose dolphins ( Tursiops truncatus ), WEN(male) and SAY (female), maintained a very high...