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Endocrine and Behavioural Plasticity in Vertebrates / AMANDA FRY

Swansea University Author: AMANDA FRY

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DOI (Published version): 10.23889/SUthesis.56835

Abstract

Endocrine plasticity is the reversible change in endocrine traits in response to unpredicted changes in an animals’ physical and social environment. Inter-individual differences in how individuals’ endocrine traits vary can occur as a result of differences in how individuals’ hypothalamic-pituitary-...

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Published: Swansea 2021
Institution: Swansea University
Degree level: Doctoral
Degree name: Ph.D
Supervisor: Fürtbauer, Ines ; King, Andrew
URI: https://cronfa.swan.ac.uk/Record/cronfa56835
first_indexed 2021-05-10T08:57:50Z
last_indexed 2021-05-11T03:22:07Z
id cronfa56835
recordtype RisThesis
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spelling 2021-05-10T10:42:34.9584291 v2 56835 2021-05-10 Endocrine and Behavioural Plasticity in Vertebrates b1f8c3ce3fdd0ef0d56ead0967377da8 AMANDA FRY AMANDA FRY true false 2021-05-10 Endocrine plasticity is the reversible change in endocrine traits in response to unpredicted changes in an animals’ physical and social environment. Inter-individual differences in how individuals’ endocrine traits vary can occur as a result of differences in how individuals’ hypothalamic-pituitary-adrenal/interrenal (HPA/I axis) respond to stressors. However, it remains unknown if and how the variation in individuals’ baseline stress hormones (measured by glucocorticoids) can predict stress-induced plasticity. In this thesis, I aim to gain a more in-depth understanding of variation in endocrine plasticity over a range of physical and social environmental changes across different vertebrate systems, and the potential factors (behavioural and morphological) driving it. First, I review the literature on between-individual variation in endocrine plasticity to better understand why and how plasticity occurs (Chapter 1) and provide an overview of my methods and study systems (Chapter 2). Second, I investigate the effects of familiarity and recent social context on cortisol responses (Chapter 3) and behavioural responses (Chapter 4) in three-spined stickleback fish (Gasterosteus aculeatus). Third I investigate endocrine plasticity in humans (Homo sapiens) and potential links to BIG 5 personality measures in a social task (Chapter 5). Fourth, I investigate long-term plasticity in Welsh mountain ewes (Ovis aries) in response to changing food availability (Chapter 6). Across these three different study systems I find i) endocrine repeatability, which can be considered equivalent to personality traits, ii) evidence for endocrine plasticity and between-individual differences in plasticity, and iii) links between endocrine repeatability and plasticity to between variations behavioural/morphological traits. In the final chapter (Chapter 7) I discuss how these findings advance our understanding of how individuals respond and adapt to environmental challenges. E-Thesis Swansea 31 3 2021 2021-03-31 10.23889/SUthesis.56835 COLLEGE NANME COLLEGE CODE Swansea University Fürtbauer, Ines ; King, Andrew Doctoral Ph.D 2021-05-10T10:42:34.9584291 2021-05-10T09:55:34.3637626 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Biosciences AMANDA FRY 1 56835__19833__80b6c1d9f1b94edebc20d7661ddc409c.pdf Fry_Amanda_L_PhD_Thesis_Final_Redacted_Signature.pdf 2021-05-10T10:35:41.4631845 Output 3039156 application/pdf E-Thesis – open access true Copyright: The author, Amanda Louise Fry, 2021. true eng
title Endocrine and Behavioural Plasticity in Vertebrates
spellingShingle Endocrine and Behavioural Plasticity in Vertebrates
AMANDA FRY
title_short Endocrine and Behavioural Plasticity in Vertebrates
title_full Endocrine and Behavioural Plasticity in Vertebrates
title_fullStr Endocrine and Behavioural Plasticity in Vertebrates
title_full_unstemmed Endocrine and Behavioural Plasticity in Vertebrates
title_sort Endocrine and Behavioural Plasticity in Vertebrates
author_id_str_mv b1f8c3ce3fdd0ef0d56ead0967377da8
author_id_fullname_str_mv b1f8c3ce3fdd0ef0d56ead0967377da8_***_AMANDA FRY
author AMANDA FRY
author2 AMANDA FRY
format E-Thesis
publishDate 2021
institution Swansea University
doi_str_mv 10.23889/SUthesis.56835
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Biosciences, Geography and Physics - Biosciences{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Biosciences
document_store_str 1
active_str 0
description Endocrine plasticity is the reversible change in endocrine traits in response to unpredicted changes in an animals’ physical and social environment. Inter-individual differences in how individuals’ endocrine traits vary can occur as a result of differences in how individuals’ hypothalamic-pituitary-adrenal/interrenal (HPA/I axis) respond to stressors. However, it remains unknown if and how the variation in individuals’ baseline stress hormones (measured by glucocorticoids) can predict stress-induced plasticity. In this thesis, I aim to gain a more in-depth understanding of variation in endocrine plasticity over a range of physical and social environmental changes across different vertebrate systems, and the potential factors (behavioural and morphological) driving it. First, I review the literature on between-individual variation in endocrine plasticity to better understand why and how plasticity occurs (Chapter 1) and provide an overview of my methods and study systems (Chapter 2). Second, I investigate the effects of familiarity and recent social context on cortisol responses (Chapter 3) and behavioural responses (Chapter 4) in three-spined stickleback fish (Gasterosteus aculeatus). Third I investigate endocrine plasticity in humans (Homo sapiens) and potential links to BIG 5 personality measures in a social task (Chapter 5). Fourth, I investigate long-term plasticity in Welsh mountain ewes (Ovis aries) in response to changing food availability (Chapter 6). Across these three different study systems I find i) endocrine repeatability, which can be considered equivalent to personality traits, ii) evidence for endocrine plasticity and between-individual differences in plasticity, and iii) links between endocrine repeatability and plasticity to between variations behavioural/morphological traits. In the final chapter (Chapter 7) I discuss how these findings advance our understanding of how individuals respond and adapt to environmental challenges.
published_date 2021-03-31T04:53:21Z
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score 11.098786

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