Open Access. Powered by Scholars. Published by Universities.®

Biochemistry, Biophysics, and Structural Biology Commons

Open Access. Powered by Scholars. Published by Universities.®

Animal Sciences

Charles J. Amlaner

Birds

Articles 1 - 4 of 4

Full-Text Articles in Biochemistry, Biophysics, and Structural Biology

A Phylogenetic Analysis Of The Correlates Of Sleep In Birds, Timothy Roth, John Lesku, Charles Amlaner, Steven Lima Nov 2006

A Phylogenetic Analysis Of The Correlates Of Sleep In Birds, Timothy Roth, John Lesku, Charles Amlaner, Steven Lima

Charles J. Amlaner

Quantitative comparative studies of sleep have focused exclusively on mammals. Such studies have repeatedly found strong relationships between the time spent in various sleep states and constitutive variables related to morphology, physiology, and life history. These studies influenced the development of several prominent hypotheses for the functions of sleep, but the applicability of these patterns and hypotheses to non-mammalian taxa is unclear. Here, we present the first quantitative analysis of sleep in a non-mammalian taxon (birds), focusing on the daily amount of time spent in slow-wave sleep (SWS) and rapid-eye movement (REM) sleep as determined by electrophysiological methods. We examined ...


Unilateral Eye Closure And Interhemispheric Eeg Asymmetry During Sleep In The Pigeon (Columba Livia), Niels Rattenborg, Charles Amlaner, Steven Lima Dec 2000

Unilateral Eye Closure And Interhemispheric Eeg Asymmetry During Sleep In The Pigeon (Columba Livia), Niels Rattenborg, Charles Amlaner, Steven Lima

Charles J. Amlaner

Aquatic mammals (i.e., Cetaceans, eared seals and manatees) and birds show interhemispheric asymmetries (IA) in slow-wave sleep-related electroencephalographic (EEG) activity, suggesting that the depth of sleep differs between hemispheres. In birds, an association between unilateral eye closure and IA has been reported in five species from three orders (i.e., Galliformes, Charadriiformes, and Anseriformes). Moreover, unilateral eye closure has been observed during behaviorally defined sleep in 29 species from 13 avian orders, suggesting that birds in general display IA during sleep. Despite the apparent prevalence of unilateral eye closure and IA in birds, previous work did not detect A ...


Behavioral, Neurophysiological And Evolutionary Perspectives On Unihemispheric Sleep, Niels Rattenborg, Charles Amlaner, Steven Lima Nov 2000

Behavioral, Neurophysiological And Evolutionary Perspectives On Unihemispheric Sleep, Niels Rattenborg, Charles Amlaner, Steven Lima

Charles J. Amlaner

Several animals mitigate the fundamental conflict between sleep and wakefulness by engaging in unihemispheric sleep, a unique state during which one cerebral hemisphere sleeps while the other remains awake. Among mammals, unihemispheric sleep is restricted to aquatic species (Cetaceans, cared seals and manatees). in contrast to mammals, unihemispheric sleep is widespread in birds, and may even occur in reptiles. Unihemispheric sleep allows surfacing to breathe in aquatic mammals and predator detection in birds. Despite the apparent utility in being able to sleep unihemispherically, very few mammals sleep in this manner. This is particularly interesting since the reptilian ancestors to mammals ...


Dispersal Of Seagulls In An Airdrome Environment, John Stout, William Gillett, James Hayward, Charles Amlaner May 1975

Dispersal Of Seagulls In An Airdrome Environment, John Stout, William Gillett, James Hayward, Charles Amlaner

Charles J. Amlaner

Glaucous-winged Gulls (Larus Glaucescens) provide an acute bird/ aircraft hazard at Shemya Air Force Base, Shemya Island, Alaska. The problem was evaluated by making survey counts of aggregations of gulls on the island. At Ellington Air Force Base, TX, Ring-billed Gulls (Larus delawarensis) often aggregate in large groups on or near the active runways and are hazardous to aircraft. Recorded gull calls played to aggregations of Glaucous-winged Gulls at Shemya AFB showed that the Distress call resulted in fewer birds remaining following playback than any other call. Distress calls played back to aggregations of Ring-billed Gulls near Ellington AFB were ...