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- Title
Application of a method for estimating effective population size and admixture using diagnostic single nucleotide polymorphisms (SNPs): implications for conservation of threatened Paiute cutthroat trout () in Silver King Creek, California.
- Authors
Finger, Amanda J.; Anderson, Eric C.; Stephens, Molly R.; May, Bernard P.; Taylor, Eric
- Abstract
The threatened Paiute cutthroat trout (, PCT) is endemic to Silver King Creek, California, USA, which was stocked with non-native trout beginning in 1930. Single nucleotide polymorphism (SNP) and microsatellite data reveal that the trout population in Silver King Creek is weakly structured and composed of introgressed California golden trout (, CAGT), hatchery rainbow trout (, RT), and some native PCT. Two SNP groups were analyzed: ( i) one mitochondrial and five autosomal SNPs, diagnostic between Lahontan cutthroat trout () or PCT and CAGT or RT and ( ii) one mitochondrial and five autosomal SNPs nearly diagnostic between CAGT and RT. The five autosomal cutthroat-rainbow SNPs were used to jointly estimate the cutthroat trout mixing proportion in Silver King Creek and effective population size ( Ne) of the admixed population, using a coalescent-based maximum likelihood method. Given the stocking history of Silver King Creek, there are two different scenarios that bound the range of expected point estimates for Ne. We obtain point estimates of Ne = 150 and Ne = 750 for Silver King Creek under these two scenarios. This method will be useful in cases with differentiated taxa and in prioritizing conservation and restoration programs where the populations of concern are introgressed.
- Subjects
CALIFORNIA; GENETIC polymorphisms; PAIUTE cutthroat trout; FISH conservation; MICROSATELLITE repeats; FISH population estimates; FISH population measurement; FISHERY management
- Publication
Canadian Journal of Fisheries & Aquatic Sciences, 2011, Vol 68, Issue 8, p1369
- ISSN
0706-652X
- Publication type
Article
- DOI
10.1139/f2011-075