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

Biochemistry, Biophysics, and Structural Biology Commons

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

Articles 61 - 77 of 77

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

Taking Laboratory Experiments Into The Field: Studies Of Sleep In Wild Animals, Charles Amlaner Dec 1983

Taking Laboratory Experiments Into The Field: Studies Of Sleep In Wild Animals, Charles Amlaner

Charles J. Amlaner

No abstract provided.


A Synthesis Of Sleep In Wild Birds, Charles Amlaner, Nigel Ball Dec 1982

A Synthesis Of Sleep In Wild Birds, Charles Amlaner, Nigel Ball

Charles J. Amlaner

No abstract provided.


Twenty-Four Hour Temperature And Activity Measurements Of Herring Gulls (Larus Argentatus), Charles Amlaner, David Mcfarland Dec 1981

Twenty-Four Hour Temperature And Activity Measurements Of Herring Gulls (Larus Argentatus), Charles Amlaner, David Mcfarland

Charles J. Amlaner

No abstract provided.


Sleep In The Herring Gull (Larus Argentatus), Charles Amlaner, David Mcfarland Apr 1981

Sleep In The Herring Gull (Larus Argentatus), Charles Amlaner, David Mcfarland

Charles J. Amlaner

Sleep postures and eye state of free-ranging herring gulls (Larus argentatus) were studied during the breeding season. Three mutually exclusive behaviours were observed, namely sleep, rest-sleep and rest postures. Arousal thresholds, eye blink rates and eye closure time were obtained during these behaviours. Significant relationships existed between eye blinking, eye closure, and a raised threshold of arousal when birds were in the sleep and rest-sleep postures. During a natural disturbance, birds in the sleep posture remained in this posture but did not blink their eyes: this is called pseudo sleep. Male gulls also exhibited a lower threshold of arousal while ...


Listening In To Wildlife, Charles Amlaner, David Macdonald Dec 1980

Listening In To Wildlife, Charles Amlaner, David Macdonald

Charles J. Amlaner

No abstract provided.


Techniques Of Study In Animal Behaviour, Charles Amlaner Dec 1979

Techniques Of Study In Animal Behaviour, Charles Amlaner

Charles J. Amlaner

No abstract provided.


A Handbook On Biotelemetry And Radio Tracking, Charles Amlaner (Editor), David Macdonald (Editor) Dec 1979

A Handbook On Biotelemetry And Radio Tracking, Charles Amlaner (Editor), David Macdonald (Editor)

Charles J. Amlaner

Proceedings of an International Conference on Telemetry and Radio Tracking in Biology and Medicine, held in Oxford, March 20-22, 1979.


Changing Heart Rates Of Herring Gulls When Approached By Humans, Nigel Ball, Charles Amlaner Dec 1979

Changing Heart Rates Of Herring Gulls When Approached By Humans, Nigel Ball, Charles Amlaner

Charles J. Amlaner

No abstract provided.


A Clarification On The Effects Of Telemetry Transmitter Weight On Breeding Success In Herring Gulls, Charles Amlaner, Richard Sibly, Robin Mccleery Dec 1978

A Clarification On The Effects Of Telemetry Transmitter Weight On Breeding Success In Herring Gulls, Charles Amlaner, Richard Sibly, Robin Mccleery

Charles J. Amlaner

No abstract provided.


Voltage-Controlled Oscillators: Inexpensive Alternative To Analog-To-Digital Converters, Brian Partridge, Richard Dawkins, Charles Amlaner Sep 1978

Voltage-Controlled Oscillators: Inexpensive Alternative To Analog-To-Digital Converters, Brian Partridge, Richard Dawkins, Charles Amlaner

Charles J. Amlaner

Describes a simple software mimic of an analog-to-digital (A/D) converter that is suitable for most laboratory applications requiring A/D. The routine samples output from a voltage-controlled oscillator that can be built for around $6. Results of proving trials show the output to be linear and sampling rates of up to 50/sec are possible.


Design Of A Remotely Controlled 'Locomotory' Platform Useful In Ethological Studies., Charles Amlaner, Robert Korzyniowski, Robert Bender, John Stout Sep 1978

Design Of A Remotely Controlled 'Locomotory' Platform Useful In Ethological Studies., Charles Amlaner, Robert Korzyniowski, Robert Bender, John Stout

Charles J. Amlaner

A platform capable of movement from one point to another under remote control has been designed for use in behavior studies. Electrical and mechanical design criteria for the platform are discussed, and schematics and engineering drawings are included. The primary application was to study communication between Glaucous-winged gulls. Other applications are suggested.


Aggressive Communication By Larus Glaucescens. Part Vi: Interactions Of Territory Residents With A Remotely Controlled, Locomotory Model, Charles Amlaner Dec 1977

Aggressive Communication By Larus Glaucescens. Part Vi: Interactions Of Territory Residents With A Remotely Controlled, Locomotory Model, Charles Amlaner

Charles J. Amlaner

Observations and experiments on aggressive communication by Larus glaucescens gulls were conducted on Colville Island in 1974. The colony contains approximately 1,800 breeding pairs of Ss. Defenders maintaining a territory utilized defense strategies when responding to a locomotory model. Model directional movement, body posture, and orientation were highly correlated with subsequent behavioral response by the defender. Directional model movement caused an immediate position adjustment by the defender in most cases. The sex of defending birds interacting with the model was not distributed randomly. Males interacted more than females. Evidence supports the observation that male defenders are more aggressive than ...


Effects Of Telemetry Transmitter Weight On Breeding Success In Herring Gulls, Charles Amlaner, Richard Sibly, Robin Mccleery Dec 1977

Effects Of Telemetry Transmitter Weight On Breeding Success In Herring Gulls, Charles Amlaner, Richard Sibly, Robin Mccleery

Charles J. Amlaner

Dummy ratio-tracking transmitters weighing 10, 30 and 50 g were attached to randomly chosen pairs of breeding herring gulls (Larus argentatus). Breeding success was measured as a function of eggs hatched and chicks fledged. Fewer clutches survived if patients were subjected to more severe treatments (p less than 0.02). Component effects (catching pairs of gulls or increased transmitter weight) were not singularly significant in decreasing clutch success.


Biotelemetry From Free Ranging Animals, Charles Amlaner Dec 1977

Biotelemetry From Free Ranging Animals, Charles Amlaner

Charles J. Amlaner

No abstract provided.


Increases In A Population Of Nesting Glaucous-Winged Gulls Disturbed By Humans, Charles Amlaner, James Hayward, Ernest Schwab, John Stout Dec 1976

Increases In A Population Of Nesting Glaucous-Winged Gulls Disturbed By Humans, Charles Amlaner, James Hayward, Ernest Schwab, John Stout

Charles J. Amlaner

No abstract provided.


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 ...


Predation On Nesting Gulls By A River Otter In Washington State, James Hayward, Charles Amlaner, W. Gillett, John Stout Apr 1975

Predation On Nesting Gulls By A River Otter In Washington State, James Hayward, Charles Amlaner, W. Gillett, John Stout

Charles J. Amlaner

No abstract provided.