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Individual differences in neophobia:...

Bebus, Sara Elizabeth.

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Individual differences in neophobia: Relationships with stress-physiology, experience, and learning.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Individual differences in neophobia: Relationships with stress-physiology, experience, and learning./
作者:	Bebus, Sara Elizabeth.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2016,
面頁冊數:	131 p.
附註:	Source: Dissertation Abstracts International, Volume: 78-04(E), Section: B.
Contained By:	Dissertation Abstracts International78-04B(E).
標題:	Zoology. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10296232
ISBN:	9781369394641

Individual differences in neophobia: Relationships with stress-physiology, experience, and learning.
Bebus, Sara Elizabeth.

Individual differences in neophobia: Relationships with stress-physiology, experience, and learning. - Ann Arbor : ProQuest Dissertations & Theses, 2016 - 131 p.

Source: Dissertation Abstracts International, Volume: 78-04(E), Section: B.

Thesis (Ph.D.)--The University of Memphis, 2016.

Consistent, intraspecific variation in behavior, termed animal personality, has been demonstrated in a wide variety of taxa. While the theoretical ecological and evolutionary implications of personality have been recognized, there are critical gaps in knowledge. For example, though behavior may be less repeatable over time, few studies have measured long-term consistency. I determined long-term repeatability of neophobia and examined factors that may influence neophobia. Then, I tested whether 'bold' behavior was consistent across contexts and related to stress-physiology, as predicted by the coping style model. While personality limits behavioral plasticity, individuals still may adjust their behavior based on environmental conditions. I investigated how a change in environmental risk may influence neophobia and whether an individual's stress-response influences their reaction to risk. Finally, I compared the relationships among personality, learning, and stress-physiology to determine if differences in performance on learning tasks were related to personality. I investigated neophobic behavior, as it can be assayed in situ in free-living Florida scrub-jays, Aphelocoma coerulescens. Neophobia was repeatable in individuals. Older birds were more neophobic, which may be due to selective mortality on bolder individuals. Boldness near a novel object correlated with boldness in a non-novel context, but was not related to stress-responsiveness. In a separate study, individuals were more neophobic after a "predation attempt" (i.e., standardized capture and restraint) and the effect was conditional on physiological profile, with low stress-responders the most hesitant to approach a novel object after capture. When I examined cognition, I found that individuals experienced a trade-off in performance between types of learning which correlated with personality. Corticosterone exposure during the nestling period was correlated with learning as an adult. Low levels of corticosterone were associated with better associative learning performance and high levels with better reversal learning performance. These findings provide evidence that variation in sensitivity to environmental conditions, as reflected by an individual's personality, underlie the strategy individuals use to perform cognitive tasks (i.e., cognitive style). Overall, the results of this dissertation contribute to gaps in knowledge of animal personality and demonstrate that the Florida scrub-jay provides a suitable model for further investigation of the causes and consequences associated with personality.

ISBN: 9781369394641Subjects--Topical Terms:

518878
Zoology.

Individual differences in neophobia: Relationships with stress-physiology, experience, and learning.
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