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Underlying behavioural and physiological determinants of dominance hierarchy in a eusocial mammalian species, the naked mole-rats (Heterocephalus glaber)
Thesis (PhD (Zoology))--University of Pretoria, 2023.
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| Format: | Thesis |
| Language: | English |
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University of Pretoria
2023
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| _version_ | 1867613471075467264 |
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| access_status_str | Open Access |
| author2 | Bennett, Nigel Charles |
| author_browse | Bennett, Nigel Charles |
| author_facet | Bennett, Nigel Charles |
| collection | Thesis |
| dc_rights_str_mv | © 2023 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. |
| description | Thesis (PhD (Zoology))--University of Pretoria, 2023. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/93800 |
| institution | University of Pretoria (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:36:40.309Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2023 |
| publishDateRange | 2023 |
| publishDateSort | 2023 |
| publisher | University of Pretoria |
| publisherStr | University of Pretoria |
| record_format | dspace |
| source_str | UPSpace — University of Pretoria Institutional Repository |
| spelling | oai:repository.up.ac.za:2263/93800 Underlying behavioural and physiological determinants of dominance hierarchy in a eusocial mammalian species, the naked mole-rats (Heterocephalus glaber) Bennett, Nigel Charles u17297002@tuks.co.za Ganswindt, Andre Hart, Daniel Majelantle, Tshepiso Lesedi UCTD Naked mole-rat (Heterocephalus glaber) Heterocephalus glaber Social hierarchy Animal personality Glucocorticoids Testosterone Progestogens Stress Reproduction Sustainable Development Goals (SDGs) SDG-03: Good health and well-being Natural and agricultural sciences theses SDG-03 SDG-15: Life on land Natural and agricultural sciences theses SDG-15 Thesis (PhD (Zoology))--University of Pretoria, 2023. The naked mole-rat (Heterocephalus glaber) is a subterranean mammal which occurs in colonies of up to 60 individuals. The animals have a distinct dominance hierarchy with breeders at the top specifically dominant breeding female (queen) and one to three breeding males, and the rest of the hierarchy is occupied by non-reproductive subordinates. The non-reproductive subordinates are able to reproduce, but are suppressed from reproducing by the queen.The aim of this thesis was to investigate how dominance-ranking position in naked mole-rats differs with animal personality traits, as well as stress-related and reproduction endocrine markers. However, to achieve this goal, the methods used to quantify animal personality traits, and the assays to determine stress- and reproduction-related hormone concentrations had to first be reliably validated. The validation steps are covered in the first three data chapters of the thesis. Thereafter, the last data chapters applied the novel validated methods in five naked mole-rat colonies. This study has revealed that the degree of reproductive suppression orchestrated at the level of the pituitary on various members of entire colonies is unequal, with some colony members being more suppressed than others that are closely linked to their position in the dominance hierarchy of the colony. Similarly, naked mole-rats experience differing levels of stress while in the colony and this may well be dependent upon their position in the dominance hierarchy and consequently interactions with the queen. SARChI Chair of Mammalian Behavioral Ecology and Physiology from the DST–NRF South Africa, the National Research Foundation (grant No. 64756) Zoology and Entomology PhD (Zoology) Restricted Faculty of Natural and Agricultural Sciences 2023-12-19T07:47:11Z 2023-12-19T07:47:11Z 2024-04 2023 Thesis * A2024 http://hdl.handle.net/2263/93800 10.25403/UPresearchdata.24591387 en © 2023 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. application/pdf University of Pretoria |
| spellingShingle | UCTD Naked mole-rat (Heterocephalus glaber) Heterocephalus glaber Social hierarchy Animal personality Glucocorticoids Testosterone Progestogens Stress Reproduction Sustainable Development Goals (SDGs) SDG-03: Good health and well-being Natural and agricultural sciences theses SDG-03 SDG-15: Life on land Natural and agricultural sciences theses SDG-15 Underlying behavioural and physiological determinants of dominance hierarchy in a eusocial mammalian species, the naked mole-rats (Heterocephalus glaber) |
| title | Underlying behavioural and physiological determinants of dominance hierarchy in a eusocial mammalian species, the naked mole-rats (Heterocephalus glaber) |
| title_full | Underlying behavioural and physiological determinants of dominance hierarchy in a eusocial mammalian species, the naked mole-rats (Heterocephalus glaber) |
| title_fullStr | Underlying behavioural and physiological determinants of dominance hierarchy in a eusocial mammalian species, the naked mole-rats (Heterocephalus glaber) |
| title_full_unstemmed | Underlying behavioural and physiological determinants of dominance hierarchy in a eusocial mammalian species, the naked mole-rats (Heterocephalus glaber) |
| title_short | Underlying behavioural and physiological determinants of dominance hierarchy in a eusocial mammalian species, the naked mole-rats (Heterocephalus glaber) |
| title_sort | underlying behavioural and physiological determinants of dominance hierarchy in a eusocial mammalian species the naked mole rats heterocephalus glaber |
| topic | UCTD Naked mole-rat (Heterocephalus glaber) Heterocephalus glaber Social hierarchy Animal personality Glucocorticoids Testosterone Progestogens Stress Reproduction Sustainable Development Goals (SDGs) SDG-03: Good health and well-being Natural and agricultural sciences theses SDG-03 SDG-15: Life on land Natural and agricultural sciences theses SDG-15 |
| url | http://hdl.handle.net/2263/93800 |