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Factors affecting the dynamics and regulation of coral-reef fish populations

Creator:

Webster, Michael Scott

Abstract:

Ecologists have long questioned why fluctuating populations tend to persist rather than go extinct. Populations that persist indefinitely are regulated by mechanisms that cause demographic density dependence, which works to bound fluctuation above zero. In a series of studies, I have sought to determine the processes and mechanisms that regulate...

Resource Type:

Dissertation

Full Text:

AN ABSTRACT OF THE THESIS OF Michael S. Webster for the degree
Unconditioned Response to a Naturally Aversive Stimulus is Associated with Sensitized Defensive Responding and Self-Reported Fearful Traits in a PTSD Sample

Creator:

Lewis, Michael W., Bradford, Daniel E., Rauch, Scott L., and Rosso, Isabelle M.

Abstract:

Unconditioned responding (UCR) to a naturally aversive stimulus is associated with defensive responding to a conditioned threat cue (CS+) and a conditioned safety cue (CS-) in trauma-exposed individuals during fear acquisition. However, the relationships of UCR with defensive responding during extinction training, posttraumatic stress disorder (PTSD) symptom severity, and fearful...

Resource Type:

Article

Full Text:

Sensitized Defensive Responding and Self-Reported Fearful Traits in a PTSD Sample Michael W. Lewis1,2