Persistence of an endangered native duck, feral mallards, and multiple hybrid swarms across the main Hawaiian Islands
| العنوان: | Persistence of an endangered native duck, feral mallards, and multiple hybrid swarms across the main Hawaiian Islands |
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| المؤلفون: | John M. Eadie, Stephen Turnbull, Philip Lavretsky, Michael D. Sorenson, Kimberly J. Uyehara, Bruce D. Dugger, Andrew Engilis, Jeffrey L. Peters, Jeffrey M. DaCosta, Caitlin P. Wells, Christopher P. Malachowski |
| المصدر: | Molecular Ecology. 28:5203-5216 |
| بيانات النشر: | Wiley, 2019. |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | 0106 biological sciences, 0301 basic medicine, Anas, Conservation genetics, Genotype, Insular biogeography, Population, Endangered species, Zoology, 010603 evolutionary biology, 01 natural sciences, Hawaii, Evolution, Molecular, 03 medical and health sciences, Genetics, Animals, education, Ecology, Evolution, Behavior and Systematics, Islands, Genetic diversity, education.field_of_study, biology, Endangered Species, Genetic Variation, DNA, Reproductive isolation, biology.organism_classification, Biological Evolution, Ducks, 030104 developmental biology, Threatened species, Hybridization, Genetic |
| الوصف: | Interspecific hybridization is recognized as an important process in the evolutionary dynamics of both speciation and the reversal of speciation. However, our understanding of the spatial and temporal patterns of hybridization that erode versus promote species boundaries is incomplete. The endangered, endemic koloa maoli (or Hawaiian duck, Anas wyvilliana) is thought to be threatened with genetic extinction through ongoing hybridization with an introduced congener, the feral mallard (A. platyrhynchos). We investigated spatial and temporal variation in hybrid prevalence in populations throughout the main Hawaiian Islands, using genomic data to characterize population structure of koloa, quantify the extent of hybridization, and compare hybrid proportions over time. To accomplish this, we genotyped 3,308 double-digest restriction-site-associated DNA (ddRAD) loci in 425 putative koloa, mallards, and hybrids from populations across the main Hawaiian Islands. We found that despite a population decline in the last century, koloa genetic diversity is high. There were few hybrids on the island of Kaua'i, home to the largest population of koloa. By contrast, we report that sampled populations outside of Kaua'i can now be characterized as hybrid swarms, in that all individuals sampled were of mixed koloa × mallard ancestry. Further, there is some evidence that these swarms are stable over time. These findings demonstrate spatial variation in the extent and consequences of interspecific hybridization, and highlight how islands or island-like systems with small population sizes may be especially prone to genetic extinction when met with a congener that is not reproductively isolated. |
| تدمد: | 1365-294X 0962-1083 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::18f2b15185974f520bf5627878e33172 https://doi.org/10.1111/mec.15286 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....18f2b15185974f520bf5627878e33172 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 1365294X 09621083 |
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