What factors shape genetic diversity in cetaceans?
| Autor: | Hal Whitehead, Felicia Vachon, Timothy R. Frasier |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
population size
0106 biological sciences 0301 basic medicine Mitochondrial DNA Range (biology) media_common.quotation_subject Biology 010603 evolutionary biology 01 natural sciences 03 medical and health sciences encephalization quotient matrilineal social systems Ecology Evolution Behavior and Systematics Original Research Nature and Landscape Conservation media_common Genetic diversity cetacea Ecology Phylogenetic tree Population size genetic diversity Encephalization quotient respiratory system 030104 developmental biology Evolutionary biology Microsatellite human activities Diversity (politics) |
| Zdroj: | Ecology and Evolution |
| ISSN: | 2045-7758 |
| DOI: | 10.1002/ece3.3727 |
| Popis: | Understanding what factors drive patterns of genetic diversity is a central aspect of many biological questions, ranging from the inference of historical demography to assessing the evolutionary potential of a species. However, as a larger number of datasets have become available, it is becoming clear that the relationship between the characteristics of a species and its genetic diversity is more complex than previously assumed. This may be particularly true for cetaceans, due to their relatively long lifespans, long generation times, complex social structures, and extensive ranges. In this study, we used microsatellite and mitochondrial DNA data from a systematic literature review to produce estimates of diversity for both markers across 42 cetacean species. Factors relating to demography, distribution, classification, biology, and behavior were then tested using phylogenetic methods and linear models to assess their relative influence on the genetic diversity of both marker types. The results show that while relative nuclear diversity is correlated with population size, mitochondrial diversity is not. This is particularly relevant given the widespread use of mitochondrial DNA to infer historical demography. Instead, mitochondrial diversity was mostly influenced by the range and social structure of the species. In addition to population size, habitat type (neritic vs. oceanic) had a significant correlation with relative nuclear diversity. Combined, these results show that many often‐unconsidered factors are likely influencing patterns of genetic diversity in cetaceans, with implications regarding how to interpret, and what can be inferred from, existing patterns of diversity. |
| Databáze: | OpenAIRE |
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