Morphological and genetic concordance of cutthroat trout (Oncorhynchus clarkii) diversification from western North America
| Autor: | Zacharia M. Njoroge, Janet L. Loxterman, Ernest R. Keeley, Sammy L. Matsaw, Meredith B. Seiler, Steven M. Seiler |
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| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
biology Range (biology) 010604 marine biology & hydrobiology Zoology Diversification (marketing strategy) biology.organism_classification 010603 evolutionary biology 01 natural sciences Trout Habitat Freshwater fish Oncorhynchus Animal Science and Zoology Ecology Evolution Behavior and Systematics |
| Zdroj: | Canadian Journal of Zoology. 99:235-248 |
| ISSN: | 1480-3283 0008-4301 |
| DOI: | 10.1139/cjz-2020-0106 |
| Popis: | The cutthroat trout (Oncorhynchus clarkii (Richardson, 1836)) is one of the most widely distributed species of freshwater fish in western North America. Occupying a diverse range of habitats, they exhibit significant phenotypic variability that is often recognized by intraspecific taxonomy. Recent molecular phylogenies have described phylogenetic diversification across cutthroat trout populations, but no study has provided a range-wide morphological comparison of taxonomic divisions. In this study, we used linear- and geometric-based morphometrics to determine if phylogenetic and subspecies divisions correspond to morphological variation in cutthroat trout, using replicate populations from throughout the geographic range of the species. Our data indicate significant morphological divergence of intraspecific categories in some, but not all, cutthroat trout subspecies. We also compare morphological distance measures with distance measures of mtDNA sequence divergence. DNA sequence divergence was positively correlated with morphological distance measures, indicating that morphologically more similar subspecies have lower sequence divergence in comparison to morphologically distant subspecies. Given these results, integrating both approaches to describing intraspecific variation may be necessary for developing a comprehensive conservation plan in wide-ranging species. |
| Databáze: | OpenAIRE |
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