Cited by 1Animal Behavior and Welfare StudiesStress Responses and CortisolAvian ecology and behavior

Establishment and Application of a Fecal Glucocorticoid Metabolite Assay for 4.1 Magellanic Penguins (Spheniscus Magellanicus) for the Assessment of Adrenal Activity in Conjunction with Behavioral Observations to Understand the Potential Impact Associated with Variables of Behind the Scenes Tours at a Zoological Facility

Open access
Hartell-DeNardo, Julie·2015·George Mason University

Abstract

An excrement glucocorticoid metabolite (GCM) assay was established for penguins and was applied as a tool, in conjunction with behavioral observations, to evaluate individual birds responses to participation in a behind the scenes tour program involving potential tactile interactions with zoo guests. An adrenocorticotrophic hormone (ACTH) challenge was used to validate a corticosterone assay for measuring GCM in Magellanic penguin excrement, as well as to develop individual GCM profiles consisting of maximum values, baseline, and percent change for each bird. The GCM assay was used in conjunction with behavioral and environmental data collected during behind the scenes tours as a means to quantify potential stress. Excrement samples and tour observations were collected daily from each bird for one week during which it participated, with a second bird, in tours with zoo guests twice daily. Excrement samples were also collected from each bird daily during one week in which it participated in no tours. Results indicate that both endocrine and behavioral responses to tours, and associated tour environment components, are variable among the individual birds. While three of the birds did not have significant changes in GCM values (F1,48 = 2.05, p = 0.16) on days they participated in tours, two birds did show increased GCM levels (F1,35 = 4.60, p = 0.04) on days that they participated in tours. These same two birds also showed a lower maximum response to ACTH challenge (= 1,205ng/g…

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  • Our results differed from the one previous study that investigated penguin behavioral responses to an ambassador program in which Magellanic penguins showed an increase in negative or aggressive behaviors during guest encounter programs.

    “Our results differed from the one previous study that investigated penguin behavioral responses to an ambassador program in which Magellanic penguins showed an increase in negative or aggressive behaviors during guest encounter programs [13].”
  • In a study of Magellanic penguins, two penguins exhibited increased fecal glucocorticoid metabolite levels on days with tours, while three did not.

    “Two penguins exhibited increased FGM levels on days with tours, while three did not.”
  • Additional factors may contribute to the different responses to ambassador programs reported here and by Hartell-DeNardo.

    “However, given that both Magellanic and African penguins have been shown to desensitize similarly to human presence in the wild [41,42], additional factors may contribute to the different responses to ambassador programs reported here and by Hartell-DeNardo [13].”
  • Responses to ambassador programs may vary by individual.

    “This suggests that responses to ambassador programs may vary by individual and that individual control over the level of participation may be a key component to the welfare response.”
  • All five Magellanic penguins exhibited an increase in negative behaviors (nipping, biting) during involuntary situations, such as when guided into a different location by caretakers.

    “All five birds exhibited an increase in negative behaviors (nipping, biting), during involuntary situations, such as when guided into a different location by caretakers.”

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Authors
Hartell-DeNardo, J.
Venue
George Mason University
Publisher
George Mason University
Published
2015-03-24
OpenAlex
W2261197219
Cited by
1
References
0
Citations by year
2019: 1
Type
dissertation
Language
en
Open access
Locations
George Mason University
Topics
  • Health Sciences › Veterinary › Small Animals › Animal Behavior and Welfare Studies
  • Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
  • Physical Sciences › Environmental Science › Ecology › Avian ecology and behavior
Keywords
fecal glucocorticoid metabolites, Magellanic penguin, Spheniscus magellanicus, zoo animal welfare, stress measurement, hypothalamic-pituitary-adrenal axis, chronic stress, ACTH challenge, corticosterone, individual differences in stress response, captive birds

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