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Population genetic structure of two abyssal grenadiers of the north Atlantic and northeastern Pacific oceans

<p> I studied the population genetic structure of abyssal grenadier: <i> Coryphaenoides armatus</i> and <i>Coryphaenoides yaquinae</i> of the Pacific and Atlantic Ocean basins, testing the hypothesis that population genetic structure is detectable by microsatellite allele analysis. I determined allele frequencies at six microsatellite loci, assessing genetic structure using Jost&rsquo;s <i>D<sub>est</sub>.</i> </p><p> Pacific versus Atlantic <i>C. armatus</i> yielded <i> D<sub>est</sub></i> comparable to Pacific C. armatus caught 170 km apart. Given the subspecies designation of North Pacific versus Atlantic C. armatus, it was unexpected that <i>D<sub>est</sub></i> of the former comparison would approximate the latter; or that the latter would be significant at all. Pacific fish may exhibit depth-driven genetic structure. Coryphaenoides yaquinae of the eastern Pacific, CCZ, and central North Pacific were also compared. Only the CCZ versus eastern Pacific yielded unambiguously significant <i> D<sub>est</sub></i>. Similar values among <i>D<sub>est</sub></i> in both species suggest horizontal distances among sampling sites are not the principal driver of population genetic structure.</p>
Date23 February 2017
CreatorsOlson, Cody R.
PublisherCalifornia State University, Long Beach
Detected LanguageEnglish

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