| 项目编号: | 1601433
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| 项目名称: | DISSERTATION RESEARCH: Integrative Taxonomy and Species Delimitation of Hakes (Merluccius, Merlucciidae) |
| 作者: | Eric Hilton
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| 承担单位: | College of William & Mary Virginia Institute of Marine Science
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| 批准年: | 2016
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| 开始日期: | 2016-06-01
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| 结束日期: | 2018-05-31
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| 资助金额: | 18685
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| 资助来源: | US-NSF
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| 项目类别: | Standard Grant
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| 国家: | US
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| 语种: | 英语
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| 特色学科分类: | Biological Sciences - Environmental Biology
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| 英文关键词: | species
; taxonomy
; hake species
; species delimitation
; genome-wide
; within-species variation
; endangered species act
; new integrative method
; species hypothesis
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| 英文摘要: | How the distinction between species is recognized is becoming increasingly objective and cross-disciplinary. Despite the computational challenges of large datasets, new methods allow genetic and non-genetic data to be analyzed together. These methods offer great potential for genome-wide sampling of variation at different evolutionary scales and an opportunity to understand taxonomic groups with complex evolutionary histories. The 16 currently recognized species of hake, a commercially valuable group of fishes, are often difficult to identify because they are very similar morphologically and there is a high level of within-species variation. This confusion has increased in recent years because there has been continuous splitting and lumping of species based on limited sampling, and limited data on morphological and genetic variability. Some hake species are of conservation concern, with at least one population of the North Pacific Hake being listed under the Endangered Species Act. The poor understanding of the taxonomy of these fishes has led to inaccuracies in fisheries data, making management and conservation difficult. This research seeks to shed new light on the taxonomy of hakes by applying the new approaches of using both genetic and anatomical information together.
The possibility of genome-wide biases, such as rate heterogeneity, underscores the need for corroboration from independent data such as morphology. In contrast, morphological data contains a mixture of informative and misleading traits that are able to delimit some taxa but unable to retrieve others. This study will empirically test the applicability of new integrative methods that combine genome-wide single nucleotide polymorphisms (SNP) and morphological data in a Bayesian framework for delimiting hake species. A two-step approach to species delimitation will be used: a species 'discovery' step (without a priori species hypotheses) to assign individuals to putative groups, followed by a 'validation' step, which tests the robustness of the groups. This study will result in a better understanding of the evolution and taxonomy of a group of commercially valuable fishes, and these results can be directly applied to fisheries management. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/92231
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| Appears in Collections: | 全球变化的国际研究计划
科学计划与规划
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| Recommended Citation: | |
Eric Hilton. DISSERTATION RESEARCH: Integrative Taxonomy and Species Delimitation of Hakes (Merluccius, Merlucciidae). 2016-01-01.
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