Morphological and Genetic Variation of Three-spined Stickleback (Gasterosteus aculeatus) in a Hybrid Zone
The mechanisms that contribute to evolutionary divergence between popula-tions are difficult to discern, but may be suggested by patterns in the distribu-tion of morphological traits, alleles and genotypes. Hybrid zones across eco-tones and population variation across environmental gradients can be...
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| Format: | Thesis (University of Nottingham only) |
| Language: | English |
| Published: |
2025
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| Online Access: | https://eprints.nottingham.ac.uk/80967/ |
| _version_ | 1848801282141192192 |
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| author | Bodkin, Harry |
| author_facet | Bodkin, Harry |
| author_sort | Bodkin, Harry |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | The mechanisms that contribute to evolutionary divergence between popula-tions are difficult to discern, but may be suggested by patterns in the distribu-tion of morphological traits, alleles and genotypes. Hybrid zones across eco-tones and population variation across environmental gradients can be especial-ly useful in this regard. Here, I analyse changes in morphological traits such as armour plating, standard length and body shape, as well as genetic variation such as the allele frequency of the well-known Eda locus, across environmental gradients within a hybrid zone and between systems. I show the lack of a pat-tern in morphological traits across the hybrid zone, but very strong genetic structure. In addition, I observe allele frequencies of chromosomal inversions across environmental gradients to show a tight link between the chromosome XI inversion and pH in freshwater systems. |
| first_indexed | 2025-11-14T21:04:58Z |
| format | Thesis (University of Nottingham only) |
| id | nottingham-80967 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T21:04:58Z |
| publishDate | 2025 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-809672025-07-24T04:40:15Z https://eprints.nottingham.ac.uk/80967/ Morphological and Genetic Variation of Three-spined Stickleback (Gasterosteus aculeatus) in a Hybrid Zone Bodkin, Harry The mechanisms that contribute to evolutionary divergence between popula-tions are difficult to discern, but may be suggested by patterns in the distribu-tion of morphological traits, alleles and genotypes. Hybrid zones across eco-tones and population variation across environmental gradients can be especial-ly useful in this regard. Here, I analyse changes in morphological traits such as armour plating, standard length and body shape, as well as genetic variation such as the allele frequency of the well-known Eda locus, across environmental gradients within a hybrid zone and between systems. I show the lack of a pat-tern in morphological traits across the hybrid zone, but very strong genetic structure. In addition, I observe allele frequencies of chromosomal inversions across environmental gradients to show a tight link between the chromosome XI inversion and pH in freshwater systems. 2025-07-24 Thesis (University of Nottingham only) NonPeerReviewed application/pdf en cc_by https://eprints.nottingham.ac.uk/80967/1/HarryBodkin_RevisedThesis.pdf Bodkin, Harry (2025) Morphological and Genetic Variation of Three-spined Stickleback (Gasterosteus aculeatus) in a Hybrid Zone. MRes thesis, University of Nottingham. hybrid zones three-spined Stickleback chromosomal inversions mitochondrial DNA |
| spellingShingle | hybrid zones three-spined Stickleback chromosomal inversions mitochondrial DNA Bodkin, Harry Morphological and Genetic Variation of Three-spined Stickleback (Gasterosteus aculeatus) in a Hybrid Zone |
| title | Morphological and Genetic Variation of Three-spined Stickleback
(Gasterosteus aculeatus) in a Hybrid Zone |
| title_full | Morphological and Genetic Variation of Three-spined Stickleback
(Gasterosteus aculeatus) in a Hybrid Zone |
| title_fullStr | Morphological and Genetic Variation of Three-spined Stickleback
(Gasterosteus aculeatus) in a Hybrid Zone |
| title_full_unstemmed | Morphological and Genetic Variation of Three-spined Stickleback
(Gasterosteus aculeatus) in a Hybrid Zone |
| title_short | Morphological and Genetic Variation of Three-spined Stickleback
(Gasterosteus aculeatus) in a Hybrid Zone |
| title_sort | morphological and genetic variation of three-spined stickleback
(gasterosteus aculeatus) in a hybrid zone |
| topic | hybrid zones three-spined Stickleback chromosomal inversions mitochondrial DNA |
| url | https://eprints.nottingham.ac.uk/80967/ |